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- Keyword
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- Numerical simulation (87)
- Coalbed methane (47)
- Coal mine (39)
- Ordos Basin (31)
- Gas drainage (28)
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- Deep learning (27)
- Permeability (27)
- Pore structure (27)
- Coalbed methane (CBM) (25)
- Deep coalbed methane (24)
- Hydraulic fracturing (23)
- Tar-rich coal (23)
- Directional drilling (21)
- Underground coal mine (20)
- Coal (17)
- Deep coalbed methane (CBM) (17)
- Qinshui Basin (15)
- Horizontal well (14)
- Open-pit coal mine (14)
- Rock burst (14)
- Shale gas (13)
- Underground coal gasification (UCG) (13)
- Fracture (12)
- Machine learning (12)
- Mine water (12)
- Prospect (12)
- Fractal dimension (11)
- Helium (11)
- Intelligent mining (11)
- Microstructure (11)
- Publication Year
Articles 1351 - 1380 of 1799
Full-Text Articles in Sustainability
Study On The Main Controlling Geological Factors Of High Yield Deep Cbm In Southern Yanchuan Block, Gao Yuqiao, Li Xin, He Xipeng, Chen Zhenlong, Chen Gang
Study On The Main Controlling Geological Factors Of High Yield Deep Cbm In Southern Yanchuan Block, Gao Yuqiao, Li Xin, He Xipeng, Chen Zhenlong, Chen Gang
Coal Geology & Exploration
The Southern Yanchuan Block belongs to a deep, high-rank coalbed methane(CBM) reservoir. Due to the influence of geological conditions, the single well productivity varies greatly. Researching on the main controlling geological factors and their changing mechanism of CBM accumulation, combined with the dynamic data of CBM development, the main controlling geological factors of the CBM well enrichment and high production are analyzed. The research results show that the productivity of the gas field is controlled by the geological factors of “tectonic, hydrology, coal structure”. Tectonic restricts the accumulation of CBM; the degree of salinity characterizes affects the preservation of CBM; …
New Mathematical Model And Key Parameters Of Capillary Pressure Curves Of High-Rank Coal Samples, Chen Ke, Tang Lei, Yin Chao, He Wei, Zhang Wei, Quan Zheng
New Mathematical Model And Key Parameters Of Capillary Pressure Curves Of High-Rank Coal Samples, Chen Ke, Tang Lei, Yin Chao, He Wei, Zhang Wei, Quan Zheng
Coal Geology & Exploration
Capillary pressure is an important parameter that affects the occurrence and development of coalbed methane. In order to establish an effective mathematical model to characterize capillary pressure curves of high-rank coalbed methane reservoirs, coal samples from No.3 coal seam in southern Qinshui Basin was taken as the research object, high-pressure mercury intrusion experiments were carried out, and the adaptability of the typical mathematical models of the capillary pressure curve currently in common use are systematically evaluated. Then a new mathematical model with higher fitting degree for high-rank coal is established. The results show that capillary pressure curves of 6 coal …
3d Geological Model Construction And Error Analysis Of Intelligent Mining Working Face, Wang Xinmiao, Han Baoshan, Song Tao, Shen Kai, Yue Hui, Lei Xiaoyu
3d Geological Model Construction And Error Analysis Of Intelligent Mining Working Face, Wang Xinmiao, Han Baoshan, Song Tao, Shen Kai, Yue Hui, Lei Xiaoyu
Coal Geology & Exploration
The complexity of geological conditions is one of the key issues affecting the further development of current intelligent mining, and there is an urgent need to build a high-precision 3D geological model of the mining face. This article analyzes the construction method of the intelligent mining geological model, and takes an intelligent working face of Huangling No.1 Mine as an example, combines all the geological exploration data of the working face, and uses the TIM-3D modeling software to construct the initial static model and the working face respectively. The dynamic model of the working face is equipped with a transparent …
Geochemical Characteristics And Genesis Of Coalbed Methane In Baode Area, Li Yangbing, Zeng Lei, Hu Weiqiang, Chen Xin, Ma Litao, Liu Cheng, Huang Ying, Qiao Fang
Geochemical Characteristics And Genesis Of Coalbed Methane In Baode Area, Li Yangbing, Zeng Lei, Hu Weiqiang, Chen Xin, Ma Litao, Liu Cheng, Huang Ying, Qiao Fang
Coal Geology & Exploration
In order to find out the geochemical characteristics and origins of coalbed methane(CBM)in Baode area, coal, CBM and water samples were collected, gas component analysis, quality detection of CBM well-produced water and stable isotope analysis were carried out. The results show that CH4 is the main hydrocarbon gas in CBM composition and its volume fraction ranges from 88.60% to 97.59%; a small amount of ethane is contained, and the volume fraction is only 0.01%-0.14%. The drying coefficient is greater than 0.99, the CBM belongs to the extremely dry CBM. The non-hydrocarbon components mainly contain CO2 and N2 …
Study On Mesozoic Magmatic Intrusion And Paleozoic Multi-Mineral Genesis Mechanism In Huanghebei Coalfield，Shandong Province, Wang Huaihong, Shen Lijun, Wang Dongdong, Zhu Yuzhen, Li Zengxue, Wang Yongjun, Mao Qiang
Study On Mesozoic Magmatic Intrusion And Paleozoic Multi-Mineral Genesis Mechanism In Huanghebei Coalfield，Shandong Province, Wang Huaihong, Shen Lijun, Wang Dongdong, Zhu Yuzhen, Li Zengxue, Wang Yongjun, Mao Qiang
Coal Geology & Exploration
Accumulation of various minerals is common in strata, especially in areas invaded by magma, which is more conducive to the generation and preservation of various minerals and greatly improves the exploration benefit and development value of mineral resources. Taking Huanghebei Coalfield in Shandong Province as an example, this paper studies the genesis mechanism of Mesozoic rock intrusion and Paleozoic multiple minerals(coal, coal-bed methane, coal-measure shale gas and rich iron ore). Research shows that: Huanghebei Coalfield Carboniferous-Permian Period tectonic conditions and sedimentary environment are conducive to the development of coal seam, and coal seam distribution in the plane is characterized by …
Evaluation Of The Development Potential Of The Coalbed Methane Resources In Mining Area Based On Ahp-Entropy Method, Jia Zhichao, Huang Huazhou, Huang Shaobo, Zhou Yu, Wang Bo
Evaluation Of The Development Potential Of The Coalbed Methane Resources In Mining Area Based On Ahp-Entropy Method, Jia Zhichao, Huang Huazhou, Huang Shaobo, Zhou Yu, Wang Bo
Coal Geology & Exploration
The development of coalbed methane(CBM) in mining area is conductive to the efficient mining of pressure relief CBM in mining panels, and it reduces the risk level of underground gas. However, the difference in geological and coal mining conditions makes the development effect of surface wells quite different. Therefore, it is of guiding significance to evaluate the pre-mining panel selection. In order to explore an efficient selection method of CBM in mining areas, a complete evaluation system of CBM development potential in mining area is established by building one vote veto system and evaluation index system, combining analytic hierarchy process(AHP) …
Discussion On Roof Water Loss Control Method Of Coal Seam Based On Pre-Splitting Grouting Reformation(P-G), Zhao Chunhu, Wang Hao, Jin Dewu
Discussion On Roof Water Loss Control Method Of Coal Seam Based On Pre-Splitting Grouting Reformation(P-G), Zhao Chunhu, Wang Hao, Jin Dewu
Coal Geology & Exploration
In view of the technical requirements of roof water disaster prevention and water resources collaborative protection faced by coal mining in western coal mining area, this paper puts forward a technical idea of roof water loss control based on pre-splitting grouting reformation(P-G) according to the strain strength theory of material mechanics and the statistical results of mining fracture zones of different overburden types. The basic principle is that the continuous bedrock layer will be fractured into discontinuous rock layers by fracturing technology, and by weakening the “tip effect” of upward expansion of mining induced water flowing fracture in hard rock …
Forward Simulation Of Fault Detection By Transmitting Channel Wave In Thin Alternating Coal Seams, Ma Yanlong
Forward Simulation Of Fault Detection By Transmitting Channel Wave In Thin Alternating Coal Seams, Ma Yanlong
Coal Geology & Exploration
In order to study the feasibility of the fault detection by transmitting channel wave in thin alternating coal seams of southwestern region, a representative area was selected, and a coal mine in Panzhihua Coal Industry Group was selected as the research object. A three-dimensional geological model with three alternating coal seams containing three partings, three partings and faults and without parting was established based on actual geological data. Through the forward simulation and analysis of the characteristics of the wave field and the frequency dispersion of the channel waves of the three dimensional elastic wave, the validity of the amplitude …
Construction And Application Of Remote Service Cloud Platform For Mine Water Hazard Prevention And Control, Wang Hao, Dong Shuning, Qiao Wei, Ji Yadong, Zhu Kaipeng, Zhou Zhenfang, Ning Dianyan, Shang Hongbo
Construction And Application Of Remote Service Cloud Platform For Mine Water Hazard Prevention And Control, Wang Hao, Dong Shuning, Qiao Wei, Ji Yadong, Zhu Kaipeng, Zhou Zhenfang, Ning Dianyan, Shang Hongbo
Coal Geology & Exploration
Coal mine water disaster restricts the safe and efficient development of coal resources seriously. Aiming at the typical problems of roof, floor and goaf mine water disaster at present, three aspects of mine water prevention and control in China has been carried out including water hazard assessment, water inflow prediction, water hazard early warning, and water hazard detection and control, etc. However, the intelligence of these prevention and control work is relatively low. In order to solve this problem, this paper developed a multi-data fusion remote service cloud platform for mine water disaster prevention and control combining with the integration …
Table Of Contents, The Editors
The Evolution Difference Of Macromolecular Structures And Its Dynamic Mechanism Of Coal Macerals：Research Status And Prospect, Cao Daiyong, Wei Yingchun, Wang Anmin, Wang Lu, Liu Zhifei, Qin Rongfang, Shu Zhenyu, Chen Gaojian
The Evolution Difference Of Macromolecular Structures And Its Dynamic Mechanism Of Coal Macerals：Research Status And Prospect, Cao Daiyong, Wei Yingchun, Wang Anmin, Wang Lu, Liu Zhifei, Qin Rongfang, Shu Zhenyu, Chen Gaojian
Coal Geology & Exploration
The physical and chemical properties of macerals are important factors affecting the clean and efficient utilization of coal and the physical properties of coal reservoirs. It has been recognized that the essential cause of determining the properties of macerals lies in their macromolecular structure. In order to reveal the evolution characteristics of macromolecular structure of macerals and its controlling factors, the research progresses at home and abroad were summarized and the shortcomings were analyzed from several aspects, such as the chemical and physical structure of macromolecules, the tectonic stress effect on the macromolecular evolution, and the evolution characteristics of macromolecules …
Review On Carbon Neutralization Associated With Coal Geology, Sang Shuxun, Wang Ran, Zhou Xiaozhi, Huang Huazhou, Liu Shiqi, Han Sijie
Review On Carbon Neutralization Associated With Coal Geology, Sang Shuxun, Wang Ran, Zhou Xiaozhi, Huang Huazhou, Liu Shiqi, Han Sijie
Coal Geology & Exploration
Coal-based carbon emissions constitute the largest part of China's total carbon emissions. Reducing coal-based carbon emissions and realizing the efficient, clean and low-carbon utilization of coal are the important ways to achieve the goal of "carbon neutralization". This paper systematically reviews the research fields of coal geology related to carbon neutralization, analyzes the role and application prospects of coal geology in carbon neutrality research and engineering practice, and discusses the development direction of coal geology in the context of carbon neutralization. The following understandings are obtained. Promoting clean coal geology research to advance the efficient and clean combustion of coal. …
Technologies And Prospect Of Geological Guarantee For Intelligent Coal Mining, Dong Shuning, Liu Zaibin, Cheng Jianyuan, Chen Baohui, Dai Zhenhua, Li Dan
Technologies And Prospect Of Geological Guarantee For Intelligent Coal Mining, Dong Shuning, Liu Zaibin, Cheng Jianyuan, Chen Baohui, Dai Zhenhua, Li Dan
Coal Geology & Exploration
Intelligent coal mining is the strategic selection of the coal industry under the new round of technological change. It is the way that must get through to achieve efficient production of coal mine safety. Geological guarantee technologies can provide accurate and reliable geological data for intelligent coal mining. Moreover, it could reduce the occurrence of coal mine production disasters and accidents by effectively detecting hidden geological factors. The development process of coal geological guarantee technologies in China is systematically expatiated, from serving for resource exploration, high-yield and efficient mine construction to serving for safe and efficient production of coal mines, …
Chemical Compositions And Technological Properties Of Low-Rank Coals In The South Shenfu Mining Area: Characteristics, Relationship And Practice, Guo Chen, Wang Shengquan, Shi Qingmin, Qiao Junwei, Li Huantong, Zhang Weiguo, Li Jun, Zhang Chi, Wang Xiaokang, Du Fangpeng
Chemical Compositions And Technological Properties Of Low-Rank Coals In The South Shenfu Mining Area: Characteristics, Relationship And Practice, Guo Chen, Wang Shengquan, Shi Qingmin, Qiao Junwei, Li Huantong, Zhang Weiguo, Li Jun, Zhang Chi, Wang Xiaokang, Du Fangpeng
Coal Geology & Exploration
Coal grading utilization is an essential way to fit its high-efficiency, clean and green development trends. Understanding the basic chemical composition and key technological properties of coal is the basis for achieving grading and qualitative utilization of coal resources. The South Shenfu mining area in Shaanxi Province is rich in coal reserves and it is an important low-rank coal production base in West China. However, it has not been able to achieve the qualitative utilization of coal practically completely for a long time, which restricts the full play of the value of coal resources and the further improvement of coal …
The Characteristics Of Pore Structure And Gas Adsorption For Water-Immersion Coal After Drying, Si Leilei, Xi Yujun, Wang Hongyang, Wen Zhihui, Wei [email protected] Jianping
The Characteristics Of Pore Structure And Gas Adsorption For Water-Immersion Coal After Drying, Si Leilei, Xi Yujun, Wang Hongyang, Wen Zhihui, Wei [email protected] Jianping
Coal Geology & Exploration
In order to investigate the characteristics of pore structure and methane adsorption for water-immersion coal after drying, two coal samples with different ranks were soaked in distilled water for a long time(60 d). Then, the low-temperature N2 adsorption experiments and CO2 adsorption experiments were carried out to investigate the changing rules of pore structure for coal before and after water immersion, and the high-pressure capacity method was used to test the characteristics of methane adsorption. Results showed that the pore volume and specific surface area of coal decreased after water immersion. According to the results of low-temperature N …
Numerical Analysis On Csw Fracturing Behavior Of Coal Seam Under Constraint Of Geological And Engineering Conditions, Qin Yong, Li Hengle, Zhang Yongmin, Zhao Youzhi, Zhao Jincheng, Qiu Aici
Numerical Analysis On Csw Fracturing Behavior Of Coal Seam Under Constraint Of Geological And Engineering Conditions, Qin Yong, Li Hengle, Zhang Yongmin, Zhao Youzhi, Zhao Jincheng, Qiu Aici
Coal Geology & Exploration
As a revolutionary technology for rock stratum reformation, the controllable shock wave(CSW) fracturing technology has achieved remarkable effect in coal seam reconstruction, and application exploration in the field of coal safety mining has been carried out. However, the previous understanding of the basic CWS fracturing rules under the constraints of geological engineering factors is insufficient due to the limitation of experimental and field monitoring conditions, which restricts the exploration of the fracturing mechanism and the optimization of the field operation parameters. In view of this, based on the description of CSW coal seam reformation and its engineering scientific problems, the …
Study On Density Of The Supercritical Methane, Zhang Xinbin, Song Dangyu, Li Yunbo, Qi Yong'an, Fan Shunli
Study On Density Of The Supercritical Methane, Zhang Xinbin, Song Dangyu, Li Yunbo, Qi Yong'an, Fan Shunli
Coal Geology & Exploration
The density of supercritical methane is not only an important parameter for calculation of unconventional natural gas resources and adsorption capacity of methane in coal, but also a main indicator for measurement of the diffusion efficiency of supercritical methane and the ability to dissolve organic matter. Through analysis and comparison of the applicability of various gas state equations, it is realized that the Helmholtz energy state equation can accurately calculate the density of methane under the conditions of 0-30 MPa and 270-360 K. A calculation program for methane density was written using Microsoft Office Excel, and the error was less …
Effects Of Alternating Stress On Casing Damage Mechanism, An Fengchen, Zhang Feiyang, Yi Hao, Zhang Sui'an
Effects Of Alternating Stress On Casing Damage Mechanism, An Fengchen, Zhang Feiyang, Yi Hao, Zhang Sui'an
Coal Geology & Exploration
Horizontal well staged fracturing technology of horizontal well has been widely used in the exploitation of low-permeability oil and gas reservoirs and coalbed methane, and has achieved good economic results. However, the vertical section of the casing is found to be damaged with serious deformation in the process of multi-stage hydraulic fracturing, which will prevent bridge plugs from being installed at the preferred design depths, thereby resulting in abandonment of all remaining fracturing stages. In this study, a user element is developed to simulate the mechanical behavior at the casing-cement sheath interface under cyclic loads. The developed element is then …
Micro-Pore Structure And Fractal Characteristics Of Terrestrial Shales: A Case Study Of Shahezi Formation In Xujiaweizi Fault Depression, Lin Zizhi, Lu Shuangfang, Chang Xiangchun, Li Junqian, Zhang Pengfei, Zhou Nengwu, Zhang Yu, Wang Junjie, Huang Hongsheng
Micro-Pore Structure And Fractal Characteristics Of Terrestrial Shales: A Case Study Of Shahezi Formation In Xujiaweizi Fault Depression, Lin Zizhi, Lu Shuangfang, Chang Xiangchun, Li Junqian, Zhang Pengfei, Zhou Nengwu, Zhang Yu, Wang Junjie, Huang Hongsheng
Coal Geology & Exploration
The pore structure and fractal characteristics of shale are analyzed, and their impacting factors are also revealed using the low temperature nitrogen adsorption-desorption method, combined with scanning electron microscopy, C-S analysis and XRD. The results showed that the mineral compositions of Shahezi Formation continental shales were dominated by clay minerals, quartz and feldspar. The pore types in shales were mainly clay mineral intragranular pores, feldspar dissolution pores and grain edge pore, while the organic pores were not developed. The adsorption isotherms of shales belonged to the type Ⅳ isotherm according to the IUPAC, which develop two types of hysteresis loop, …
Framework On Intelligent Decision Support System For Coal Seam Floor Water Hazard Prevention And Control, Jin Dewu, Li Peng
Framework On Intelligent Decision Support System For Coal Seam Floor Water Hazard Prevention And Control, Jin Dewu, Li Peng
Coal Geology & Exploration
Coal floor water inrush is a common type of water disaster in the production process of coal mines in North China coalfield. In order to solve the scientific decision making problem of water hazard prevention and control engineering and further improve the reliability of the relevant projects, this paper puts forward a technical idea of establishing an intelligent decision support system(IDSS). The IDSS is a combination of the traditional decision support system(DSS) and artificial intelligence. On the basis of analyzing the functional requirements of DSS for water hazard prevention and control, an integrated design process of "data-model-solution" is proposed, and …
Deep Mining Under Safe Water Pressure Of Aquifer: Inheritance And Innovation, Yin Shangxian, Lian Huiqing, Xu Bin, Tian Wuzi, Cao Min, Yao Hui, Meng Haopeng
Deep Mining Under Safe Water Pressure Of Aquifer: Inheritance And Innovation, Yin Shangxian, Lian Huiqing, Xu Bin, Tian Wuzi, Cao Min, Yao Hui, Meng Haopeng
Coal Geology & Exploration
The paper reviews the development course of inheritance and innovation of mining under pressure, expounds the concept and the necessary and sufficient conditions of mining under pressure, and on the basis of the connotation of mining under pressure, the base level of erosion is defined as the boundary(interface) of shallow and deep mining under pressure. The paper clarified that mining above confined water is mining under pressure, while mining under aquifer does not belong to the category, and corrects the improper expression of roof and floor pressure in "Coal Mine Safety Regulations". This paper summarizes the theory and technology directly …
Design And Implementation Of Mine Water Hazard Monitoring And Early Warning Platform, Lian Huiqing, Xu Bin, Tian Zhentao, Liu Demin, Yang Yi, Pan Guangyi, Wang Rui
Design And Implementation Of Mine Water Hazard Monitoring And Early Warning Platform, Lian Huiqing, Xu Bin, Tian Zhentao, Liu Demin, Yang Yi, Pan Guangyi, Wang Rui
Coal Geology & Exploration
Any mine water hazard will show different omens. In order to consolidate the foundation of intelligent early warning of water disaster, the connotation of system construction of perception, identification, evaluation, prediction and the interlogical relation are clarified. The mechanism of water inrush is varred for different types of water hazards, we designed three types of multi-mode water inrush typical scenarios and established the corresponding water inrush criteria. In addition, so we proposed two kinds of forecasting methods, namely the precise prediction of deterministic theory and the non-deterministic trend projections including big data and deep learning, which laid a solid theoretical …
Investigation And Simutation On The Model And Prevention Technology Of Water Inrush From Roof Bed Separation, Zhang Wenquan, Wang Zaiyong, Wu Xintao, Shao Jianli, Lei Yu, Wu Xunan
Investigation And Simutation On The Model And Prevention Technology Of Water Inrush From Roof Bed Separation, Zhang Wenquan, Wang Zaiyong, Wu Xintao, Shao Jianli, Lei Yu, Wu Xunan
Coal Geology & Exploration
In order to prevent water inrush from roof separation, a partial backfill scheme is proposed for simulation study. First of all, based on the existing data, many kinds of separation water inrush accidents occurred in China were summarized and analyzed, and the disaster model of separation water accumulation was studied deeply. Then, taking the separation water accident of 1307 working face in the first mining area of a mine in Shaanxi Province as an example, the hydrogeological conditions and the relationship between upper aquifer and separation water inrush were analyzed, and the development characteristics of roof separation space of working …
Experiment Investigation On The Influence Of Mixing Effect On Dispersion Scale Dependence, Ma Ziqi, Dai Zhenxue, Dong Shuning, Wang Hao, Liu Xiaoqian
Experiment Investigation On The Influence Of Mixing Effect On Dispersion Scale Dependence, Ma Ziqi, Dai Zhenxue, Dong Shuning, Wang Hao, Liu Xiaoqian
Coal Geology & Exploration
Dispersivity, a property parameter defined to characterize the degree of dispersion and mixing, is crucial for the prediction and remediation of groundwater contamination. However, in field tracer tests, the real mixing effect has often been ignored. In this paper, an aquifer with horizontal layered structure was simulated by laboratory experiments. Three kinds of media were chosen to reconstructed experimental aquifer. Two monitoring methods, buried sensor and sensor in the well, were adopted to compare the difference of breakthrough curves, so as to investigate the influence of mixing effect in the well on the dispersion scale dependence. The results showed that …
Mechanism Of Water Rock Interaction In Coal Measure Sandstone Aquifer Disturbed By Grouting Engineering: A Case Study Of Taoyuan Coal Mine, Guo Yan, Gui Herong, Wei Jiuchuan, Ni Jianming, Cheng Rongfa, Pang Yingchun, Zhang Zhi, Hong Huang, Hu Mancong, Cui Yali, Liang Zhan, Li Jun, Chen Jiayu, Li Chen
Mechanism Of Water Rock Interaction In Coal Measure Sandstone Aquifer Disturbed By Grouting Engineering: A Case Study Of Taoyuan Coal Mine, Guo Yan, Gui Herong, Wei Jiuchuan, Ni Jianming, Cheng Rongfa, Pang Yingchun, Zhang Zhi, Hong Huang, Hu Mancong, Cui Yali, Liang Zhan, Li Jun, Chen Jiayu, Li Chen
Coal Geology & Exploration
Coal measure sandstone fissure water is one of the important water filling sources in coal mine. This paper takes the Permian coal measures in Taoyuan Coal Mine of Huaibei Coalfield as the research object. Based on the analysis of the water chemical characteristics of coal measures since the grouting treatment of water disaster in the mine, the mechanism of hydrogeochemical action of groundwater and its controlling factors were expounded. The results show that during the grouting treatment project, the main cation in coal measures water was Na+, and the main anion was SO42-; the relationship …
Unsupervised Noise Suppression Method For Depth Network Seismic Data Based On Prior Information Constraint, Chen Wenchao, Liu Dawei, Wei Xinjian, Wang Xiaokai, Chen Dewu, Li Shuping, Li Dong
Unsupervised Noise Suppression Method For Depth Network Seismic Data Based On Prior Information Constraint, Chen Wenchao, Liu Dawei, Wei Xinjian, Wang Xiaokai, Chen Dewu, Li Shuping, Li Dong
Coal Geology & Exploration
Seismic data processing is a critical step in seismic exploration. Due to the complexity of underground structure and surface conditions, seismic data processing needs to go through a series of complex processes, thus forming various types of seismic data. Different types of seismic data have different data characteristics. Exploring and making full use of the data characteristics can not only give full play to the technical potential of processing methods, eliminate the influence of various non-geological factors on the quality of seismic data processing, but also enhance the reliability of seismic data processing. Improving the signal-to-noise ratio and resolution of …
Design And Analysis Of Hole-Forming Technology For Surface Large Diameter Emergency Rescue Borehole, Hao Shijun, Mo Haitao
Design And Analysis Of Hole-Forming Technology For Surface Large Diameter Emergency Rescue Borehole, Hao Shijun, Mo Haitao
Coal Geology & Exploration
Surface large diameter borehole can be used as the escape channel for trapped people underground, and it is one of the important emergency rescue plans when mine accidents cause people trapped underground. However, the conventional large-diameter engineering hole is mainly formed by mud positive circulation and multi-stage reaming, which can not meet the rescue requirements. Focusing on the purpose of rescue and escape of large-diameter hole, this paper expounds the hole forming technology design principles including accurate connecting roadway, optimization of borehole structure, high-efficiency hole forming and safety connecting roadway. According to the specific construction conditions of overburden drilling, second …
Distribution And Occurrence Of Uranium In Coal And Its Migration Behavior During The Coal Utilization, Wang Wenfeng, Wang Wenlong, Liu Shuangshuang, Bai Hongyang, Wang Yulong, Duan Piaopiao, Qin Kemin, Chen Yilin
Distribution And Occurrence Of Uranium In Coal And Its Migration Behavior During The Coal Utilization, Wang Wenfeng, Wang Wenlong, Liu Shuangshuang, Bai Hongyang, Wang Yulong, Duan Piaopiao, Qin Kemin, Chen Yilin
Coal Geology & Exploration
Coal and uranium resources are closely related in spatial disposition as well as mineralization, and the reasonable development, utilization and pollution control of them play an essential role in the sustainable development of our national economy and society. Based on a large number of literature research and the previous results of our research group, some conclusions were drawn with regard to the distribution and occurrence of uranium in coal `and its migration in the process of coal preparation, combustion and leaching:(1) The enrichment and mineralization of uranium in coal has reflected the evolution of coal-forming tectonics:The U-rich coal in Southwest …
Evaluation Of The Hydro-Fracturing Potential For Coalbed Methane Reservoir: A Case Study Of Zhengzhuang Cbm Field, Yao Yanbin, Wang Hui, Yang Yanhui, Liu Dameng, Lu Xiuqin, Cao Lutong
Evaluation Of The Hydro-Fracturing Potential For Coalbed Methane Reservoir: A Case Study Of Zhengzhuang Cbm Field, Yao Yanbin, Wang Hui, Yang Yanhui, Liu Dameng, Lu Xiuqin, Cao Lutong
Coal Geology & Exploration
The "double low" rate of exploration and utilization of CBM resources in China leads to a significant slowdown in CBM production, which has become a bottleneck restricting the development of CBM industry in China. The common CBM reservoir evaluation method did not pay enough attention to the hydro-fracturing potential, resulting in low discovery rate of high-quality gas reserves and low mobilization-rate of the present reserves. Thus, it is extremely necessary to do some research regarding to hydro-fracturing potential evaluation. Targeting on the Zhengzhuang CBM field of the southern Qinshui Basin, this study did comprehensive investigations including coal core analysis, physical …
Comprehensive Testing Research On Floor Damage Characteristics Of Mining Extra-Thick Seam In Jungar Coalfield, Zhang Pingsong, Liu Chang, Ou Yuanchao, Sun Binyang, Xu Shi'ang, Li Shenglin
Comprehensive Testing Research On Floor Damage Characteristics Of Mining Extra-Thick Seam In Jungar Coalfield, Zhang Pingsong, Liu Chang, Ou Yuanchao, Sun Binyang, Xu Shi'ang, Li Shenglin
Coal Geology & Exploration
The 6th coal seam of the Carboniferous Permian in a coal mine in the Ordos Basin of Inner Mongolia is an extra-thick coal seam with an average minable thickness of 17.0 m. Its floor is threatened by limestone water. Distributed sensing optical fiber technology and cross-hole resistivity CT in situ comprehensive testing technology were used in the field, and the response characteristics of strain field and geoelectric field were obtained successively during mining. Combined with the threshold value of the discriminant parameter for loading deformation and failure of rock samples and detection section of practice, the monitoring data of the …