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- Keyword
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- Coalbed methane (10)
- Numerical simulation (8)
- Hydraulic fracturing (6)
- Underground coal mine (6)
- Daning-Jixian Block (5)
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- Deep coalbed methane (5)
- Directional drilling (4)
- Ordos Basin (4)
- Prospect (4)
- Qinshui Basin (4)
- Water cutoff curtain (4)
- Yellow River Basin (4)
- Advanced detection (3)
- Coal gangue (3)
- Coalbed methane (CBM) (3)
- Eastern margin of Ordos Basin (3)
- Gas drainage (3)
- Gas extraction (3)
- Horizontal well (3)
- Index system (3)
- Open-pit coal mine (3)
- Permeability (3)
- Progress (3)
- Shear strength (3)
- Abandoned coal mine (2)
- Abandoned mine (2)
- Acoustic emission characteristics (2)
- Anisotropy (2)
- Application (2)
- Azimuth electromagnetic wave logging (2)
Articles 1 - 30 of 252
Full-Text Articles in Engineering
Table Of Contents, The Editors
Evaluation On Potential Of Using Abandoned Mines For Pumped Storage In Nine Provinces Of Yellow River Basin, Bian Zhengfu, Zhu Chaobin, Zhou Yuejin, Xu Yunong
Evaluation On Potential Of Using Abandoned Mines For Pumped Storage In Nine Provinces Of Yellow River Basin, Bian Zhengfu, Zhu Chaobin, Zhou Yuejin, Xu Yunong
Coal Geology & Exploration
In view of the low utilization rate of closed mine resources and the increasing demand for power and energy storage in China, the pumped storage technology of abandoned mine is an effective means to realize the secondary development and utilization of resources and enhance the peak sheaving capacity of power grid. Based on the working principle and development status of pumped storage power plants using the abandoned mines, it was proposed to build the semi-underground and full-underground pumped storage power plants using the abandoned mines in the nine provinces of Yellow River Basin. By considering the influence factors of space, …
Geochemical Characteristics And Sedimentary Model Of Shales In Lower Member Of Zhongjiangou Formation In Wudun Sag, Dunhuang Basin, Deng Wei, Yang Tao, Fan Shenglong, Liu Zirui, Wan Xuhui, Xiao Juanyi, Cao Taotao
Geochemical Characteristics And Sedimentary Model Of Shales In Lower Member Of Zhongjiangou Formation In Wudun Sag, Dunhuang Basin, Deng Wei, Yang Tao, Fan Shenglong, Liu Zirui, Wan Xuhui, Xiao Juanyi, Cao Taotao
Coal Geology & Exploration
Analysis on the sedimentary environment of shale is of great significance for the evaluation of shale gas reservoir and the optimization of sweet spot. In order to deeply explore the depositional environment of organic-rich shale and the mechanism of organic matter accumulation in the Lower member of Zhongjiangou Formation of Wudun Sag in Dunhuang Basin, the TOC content, maceral composition, carbon isotope, major elements, trace elements and rare earth element were tested based on DY1 well. The results indicate that the lithologies of the Lower member of Zhongjiangou Formation in Wudun Sag are gray-black carbonaceous shale and silty shale with …
Experimental Research On Mechanical Properties Of “Jacked Pipe-Frozen Soil” Composite Structure In Freeze-Sealing Pipe Roof Tunnel, Duan Yin, Rong Chuanxin, Cai Haibing, Long Wei
Experimental Research On Mechanical Properties Of “Jacked Pipe-Frozen Soil” Composite Structure In Freeze-Sealing Pipe Roof Tunnel, Duan Yin, Rong Chuanxin, Cai Haibing, Long Wei
Coal Geology & Exploration
As the key project of Zhuhai Connecting Line of Hong Kong‒Zhuhai‒Macao Bridge, the underground excavation section of Gongbei Tunnel has applied the freeze-sealing pipe roof method for the first time. Combining the advantages of the pipe roof method and the artificial ground freezing method, this method could form a “jacked pipe-frozen soil curtain” composite support system on the tunnel section, so as to effectively achieve the dual goals of “bearing” and “water-stopping between pipes”, thereby ensuring that stability and safety during tunnel excavation. To obtain the temperature, deformation and mechanical properties of the “jacked pipe-frozen soil” composite structure, a set …
Study On Performance Optimization Of Gasification Slag Based Paste Filling Materials In Ningdong Mining Area, Chen Denghong, Li Chao, Zhang Zhiguo
Study On Performance Optimization Of Gasification Slag Based Paste Filling Materials In Ningdong Mining Area, Chen Denghong, Li Chao, Zhang Zhiguo
Coal Geology & Exploration
As one of the nine coal bases at hundred million ton level in Yellow River Basin, Ningdong Mining Area has nearly 2×108 t of coal-based solid waste produced annually, and faces to the problems of large stock of gasification slag, difficulty in scaled utilization, and limited space for simple landfill. Filling mining could solve the problem of stockpiling, of which the cost is high and the performance needs to be optimized. According to the response surface method, 17 groups of central composite experiments were designed for the three factors at three levels: the mixing amount of gasification slag in …
Effect Of Coal Mining Subsidence Fractures On Source Of Water Absorption Of Artemisia Desertorum, Shang Jingxuan, Chen Shi, Liu Qianwen, Guo Xufeng, Guo Junting, Li Mi
Effect Of Coal Mining Subsidence Fractures On Source Of Water Absorption Of Artemisia Desertorum, Shang Jingxuan, Chen Shi, Liu Qianwen, Guo Xufeng, Guo Junting, Li Mi
Coal Geology & Exploration
Ground fissures caused by coal mining subsidence are not only a serious geological hazard, but also affect the growth and development of vegetation in the mining area and damage the mining ecosystem. To investigate the quantitative influence of coal mining subsidence fractures on the source of water uptaken by Artemisia Desertorum, the simulated precipitation tests of isotopically-labeled water were conducted in three test areas influenced by coal mining subsidence fractures to different degrees on 22312-working face of Huojitu mine field in Shendong mining area. The three test areas were divided according to the distance between Artemisia Desertorum and the fractures, …
Prediction Method And Application Of Gas Emission From Mining Workface Based On Stl-Eemd-Ga-Svr, Lin Haifei, Liu Shihao, Zhou Jie, Xu Peiyun, Shuang Haiqing
Prediction Method And Application Of Gas Emission From Mining Workface Based On Stl-Eemd-Ga-Svr, Lin Haifei, Liu Shihao, Zhou Jie, Xu Peiyun, Shuang Haiqing
Coal Geology & Exploration
Accurate prediction of gas emission can provide important basis for mine ventilation and the prevention and measures of gas disasters. In order to improve the prediction accuracy of gas emission in the mining workface, the monitoring data of gas emission were decomposed into the trend term, periodic term and irregular fluctuation term by the Seasonal-Trend decomposition procedure based on Loess (STL) based on the monitoring data of gas emission from the mining workface of Huangling Mine in Shaanxi. Besides, the irregular fluctuation term was further broken down into the Intrinsic Mode Functions (IMFs) components with different characteristics and the residual …
Influence Of Thick Sandstone On Development Of Overburden Mining Fissures In Northern Shaanxi Coal Mining Area Of Yellow River Basin And Suggestions On Water-Preserved Coal Mining, Wang Shuangming, Wei Jiangbo, Song Shijie, Wang Shengquan, Sun Tao
Influence Of Thick Sandstone On Development Of Overburden Mining Fissures In Northern Shaanxi Coal Mining Area Of Yellow River Basin And Suggestions On Water-Preserved Coal Mining, Wang Shuangming, Wei Jiangbo, Song Shijie, Wang Shengquan, Sun Tao
Coal Geology & Exploration
The change of geological conditions of coal seam roof overburden and the development of mining fissures caused by coal mining activities are the direct causes of damage to the key underground aquifers, and also the root causes of ecological environment degradation in the mining area. As a typical geological condition, the thick sandstone developed in the overburden structure of the coal seam roof has an important impact on the development law of mining fissures in the overburden. Therefore, the influence of the thickness and location of different thick sandstones on the development morphology and height of overburden mining fractures was …
Laws And Prevention Methods Of Ground Cracks In Shallow Coal Seam Mining, Hou Enke, Xie Xiaoshen, Feng Dong, Chen Qiuji, Che Xiaoyang, Hou Pengfei
Laws And Prevention Methods Of Ground Cracks In Shallow Coal Seam Mining, Hou Enke, Xie Xiaoshen, Feng Dong, Chen Qiuji, Che Xiaoyang, Hou Pengfei
Coal Geology & Exploration
The large-scale and high-intensity mining of shallow coal seams in northern Shaanxi has induced serious ground collapse, resulting in land damage in large area, water and soil loss, and vegetation death, and thus leading to the epigenetic environment degradation. In order to understand the development law of ground collapse and fracture in shallow coal seam mining, clarify its mechanism, and put forward the appropriate treatment and restoration measures to realize the coordinated development of “coal-water-ecology”, Zhangjiamao mine field and Ningtiaota mine field in northern Shaanxi were taken as the study area. On this basis, the development law and control methods …
Fault Diagnosis Of Hydraulic Power System For Coal Mine Tunnel Drilling Rig Based On T-S Fuzzy Fault Tree, Liu Ruojun, Zhang Youzhen, Yao Ke
Fault Diagnosis Of Hydraulic Power System For Coal Mine Tunnel Drilling Rig Based On T-S Fuzzy Fault Tree, Liu Ruojun, Zhang Youzhen, Yao Ke
Coal Geology & Exploration
In view of the problems of fuzzy logic relation between the elements of the system, the polymorphism of fault mode, and the difficulty in obtaining the fault probability as a result of the complication of the hydraulic power system for coal mine tunnel drilling rig, a fault diagnosis method of hydraulic power system for coal mine tunnel drilling rig based on Takagi-Sugeno (T-S) fuzzy tree was proposed to overcome the limitations of traditional fault tree in fault diagnosis and analysis of the complex electromechanical hydraulic equipment. The method could timely and accurately obtain the fault information of equipment, and to …
Discussion On Identification Standard Of Coal-Measure Graphite, Cao Daiyong, Wang Lu, Zhu Wenqing, Wu Guoqiang, Wei Yingchun, Ning Shuzheng, Wang Guixiang, Xiao Jincheng, Xu Xiang, Liu Kang
Discussion On Identification Standard Of Coal-Measure Graphite, Cao Daiyong, Wang Lu, Zhu Wenqing, Wu Guoqiang, Wei Yingchun, Ning Shuzheng, Wang Guixiang, Xiao Jincheng, Xu Xiang, Liu Kang
Coal Geology & Exploration
The identification and classification of coal-measure graphite are the precondition and basic work of mineral geological exploration, as well as resource exploitation and utilization. The preparation of identification standards of coal-measure graphite should follow the principles of science, systematicness, applicability and operability. Coal graphitization and coalification is a continuous progression plus jump process, and the characteristics of coal-measure graphite, including the step evolution of macromolecular structure and the heterogeneity of material composition, leads to the complexity of ore identification. In order to establish the scientific and practical identification standards, and from the study of metallogenic mechanism and the demand of …
Precise Magnetotelluric Single-Component Processing Technology And Detection Of Deep Disaster-Causing Water Body, Li Peitao, Wu Qiang, Li Zhuorong, Li Wenyu, Xie Jian, Wang Yuxi
Precise Magnetotelluric Single-Component Processing Technology And Detection Of Deep Disaster-Causing Water Body, Li Peitao, Wu Qiang, Li Zhuorong, Li Wenyu, Xie Jian, Wang Yuxi
Coal Geology & Exploration
In order to realize the fine detection of hydrogeological conditions by natural source single-component magnetotelluric technology, the problems of magnetotelluric signal acquisition and processing were systematically analyzed, and study was conducted for the response characteristics of underground water-rich area on magnetotelluric wave. Besides, water-richness index model was established according to the magnetotelluric sounding theory and analytic hierarchy process. Moreover, the corresponding relationship between waveform and lithology was fitted based on a large amount of experimental data, and the information on physical properties, such as the dielectric constant, elastic brittleness, density and porosity was extracted from the fractal dimension of waveform. …
Experimental Study On Effect Of Soil Layer Reconstruction And Inoculation On Plant Root Hydraulic Lift In Open-Pit Coal Mine Dump, Bi Yinli, Gao Xuejiang, Ke Zengming, Xiao Li
Experimental Study On Effect Of Soil Layer Reconstruction And Inoculation On Plant Root Hydraulic Lift In Open-Pit Coal Mine Dump, Bi Yinli, Gao Xuejiang, Ke Zengming, Xiao Li
Coal Geology & Exploration
Soil layer reconstruction of open-pit coal mine dump is of great significance for ecological reconstruction. In order to study the effect of inoculation of dark septate endophytes (DSE) on water utilization of corn root system under different reconstructed soil layer models, soil column simulating and culturing test was adopted, with DSE inoculation and control treatment set up under each of the four soil layer types, in a total of 8 groups. The results show that the roots of corn are the longest with the maximum density under the treatment with 20% loess, which are 3.2, 2.4 and 2.8 times that …
Geological Soil Formation For Ecological Restoration Of Mining Areas And Its Case Study, Hu Zhenqi, Zhang Zixuan, Sun Huang
Geological Soil Formation For Ecological Restoration Of Mining Areas And Its Case Study, Hu Zhenqi, Zhang Zixuan, Sun Huang
Coal Geology & Exploration
Soil is an important substrate of plant growth, as well as the key for successful ecological restoration of mine. In view of the status of insufficient soil for most of ecological restoration of mine and the reality of a very long process of geological soil formation, the concept and method of geological soil formation for ecological restoration of mine (Mine-GSF for short) were discussed on the basis of description on the principle of natural geological soil formation. Natural geologic soil formation is the process of turning “rock” into “soil” through a long period of macro-geological cycle and biological cycle, including …
Succession Process And Management Mode Of Land Reclamation In Open-Pit Coal Mine Areas Based On Vegetation Rehabilitation, Zhou Wei, Guan Yanjun
Succession Process And Management Mode Of Land Reclamation In Open-Pit Coal Mine Areas Based On Vegetation Rehabilitation, Zhou Wei, Guan Yanjun
Coal Geology & Exploration
Rehabilitated vegetation plays an important role in energy exchange and ecological cycling, and its dynamic change can characterize the extensive details of the disturbance to and the restoration of ecosystem in coal mining areas. From the points of different disturbance states of vegetation in the coal mining area, such as the undisturbed state, the coal mining disturbance state, the restoration state and the post-restoration state, six succession scenarios of the rehabilitated vegetation in coal mining areas were analyzed, including the effective restoration to maturity, inefficient restoration to maturity, effective restoration followed by degradation, effective restoration to development, inefficient restoration to …
Preparation Of Coal-Series Solid-Waste-Based Green Filling Materials And Their Performance, Dong Meng, Li Jiangshan, Chen Xin, Jin Jiaxu, Lu Longzhao
Preparation Of Coal-Series Solid-Waste-Based Green Filling Materials And Their Performance, Dong Meng, Li Jiangshan, Chen Xin, Jin Jiaxu, Lu Longzhao
Coal Geology & Exploration
The filling technology is an important part of green mining. The low-carbon environmental-friendly filling materials with low costs in research and development and reliable performance are critical for the development of filling technologies. The coal gangue (CG) and coal-series metakaolin (MK) were adopted as the raw materials to prepare coal-series solid-waste-base green filling materials, and the effect of the mixing proportion and alkali activator on the strength and fluidity of filling materials was discussed. In combination with the X-ray diffraction (XRD), Fourier-transform infrared spectroscopy (FTIR), thermogravimetric (TG) analysis and scanning electron microscopy/energy dispersive x-ray spectroscopy (SEM-EDS) and other characterization measures, …
Shear Characteristics And Modified Coulomb Model Of Alfalfa Root-Loess Composite, Duan Zhao, Yuan Lin, Bi Yinli, Wang Kai, Wu Yanbin, Zhang Qing
Shear Characteristics And Modified Coulomb Model Of Alfalfa Root-Loess Composite, Duan Zhao, Yuan Lin, Bi Yinli, Wang Kai, Wu Yanbin, Zhang Qing
Coal Geology & Exploration
Plant roots can significantly improve the strength of soil. In order to explore the enhancement effect of alfalfa root on the shear strength of loess, study was conducted based on the root-soil composites of alfalfa with a growth period of 60 d herein. Specifically, the parameters on shear strength of the alfalfa root-soil composite and the tensile strength of alfalfa root were obtained through the direct shear tests and root tensile tests. By observing the structure and characteristics of alfalfa root with an electronic magnifier, a modified Coulomb model of root-soil composite was established with the empirical formula. Meanwhile, the …
Evolution Law Of Water Inflow In Full Life Cycle Of Working Face In Deep Buried Inner Mongolia-Shaanxi Mining Area, Liu Yang, Yang Jian, Zhou Jianjun
Evolution Law Of Water Inflow In Full Life Cycle Of Working Face In Deep Buried Inner Mongolia-Shaanxi Mining Area, Liu Yang, Yang Jian, Zhou Jianjun
Coal Geology & Exploration
The deep buried Inner Mongolia-Shaanxi mining area was newly developed, where the hydrogeological characteristics under the disturbance of coal mining were still unclear. Various types of water damage problems had occurred in the process of infrastructure construction and production. Among them, no research was conducted for the variation characteristics of water inflow during and after mining in working face, which increased the difficulty in the arrangement of underground water drainage system and the work of water prevention and control. In order to find out the evolution law of water inflow in the full life cycle of working face before and …
Experimental Study On High-Pressure Hydraulic Percussive Rotary Drilling Based On Single-Tooth Rock-Breaking Process, Dou Xuqian, Yao Ningping, Li Xiushan, Wang Li, Zhang Kai, Wei Hongchao
Experimental Study On High-Pressure Hydraulic Percussive Rotary Drilling Based On Single-Tooth Rock-Breaking Process, Dou Xuqian, Yao Ningping, Li Xiushan, Wang Li, Zhang Kai, Wei Hongchao
Coal Geology & Exploration
Aiming at the problem of low efficiency of hard rock drilling in crossing borehole in underground coal mine, the morphology of crushing pit formed by column tooth under the percussive load was analyzed based on the percussive rotary drilling mechanism and the main characteristics of Wassara high-pressure hydraulic impactor, and the crushing pit was divided into the four areas of disintegration area, compact area, crack area and elastic area. On this basis, process analysis was performed on the continuous tooth rock-breaking with large and small interval impact. Meanwhile, the technical parameters of high-pressure hydraulic percussive rotary drilling were discussed with …
Comprehensive Recycling Utilization Technology Of Foundation Engineering Slurry, Xie Hui, Ye Jingliang, Chen Juan, Xue Man, Hu Huicong, Yang Xianyu, Cai Jihua
Comprehensive Recycling Utilization Technology Of Foundation Engineering Slurry, Xie Hui, Ye Jingliang, Chen Juan, Xue Man, Hu Huicong, Yang Xianyu, Cai Jihua
Coal Geology & Exploration
Foundation engineering slurry in the fields of underground continuous walls, horizontal directional drilling, shield, and pipe jacking has the characteristics of large amount of consumption and relatively single pollutant. With the implementation of various national environmental protection laws and regulations, the comprehensive treatment of slurries is particularly important. In this paper, a set of comprehensive recycling utilization technology of foundation engineering slurry was proposed. The technology of sand removal plus recycling of purified slurry and drilling cuttings can be adopted to the circulating slurry, and the technology of calcium removing, pH reducing, flocculation separation, pressure filtration and recycling of wastewater …
Path Planning Of Coal Mine Rescue Robot Based On Improved A* Algorithm, Zhang Weimin, Zhang Yue, Zhang Hui
Path Planning Of Coal Mine Rescue Robot Based On Improved A* Algorithm, Zhang Weimin, Zhang Yue, Zhang Hui
Coal Geology & Exploration
A coal mine rescue robot that performs a rescue task needs to obtain the environment model and plan a collision-free path from the current location to the target location with the built-in algorithm upon receiving a task instruction. In order to reduce the moving time of the rescue robot, the path is usually required to be time-optimal. However, the path planned by the conventional A* algorithm that is widely used at present under the grid map environment has many problems, such as many path redundancy points and large turning angle, which leads to the fact that the path is suboptimal …
Adaptive Electro-Hydraulic System Of Zmk5550tzjf50/120 Truck-Mounted Drilling Rig With Wob Adaptive Control Function, Chang Jianghua, Zhao Liang, Lu Feifei, Wang Longpeng, Yang Jiangbo
Adaptive Electro-Hydraulic System Of Zmk5550tzjf50/120 Truck-Mounted Drilling Rig With Wob Adaptive Control Function, Chang Jianghua, Zhao Liang, Lu Feifei, Wang Longpeng, Yang Jiangbo
Coal Geology & Exploration
The truck-mounted drilling rig is an ideal model for rescue drilling construction due to its strong mobility and wide process adaptability. The traditional truck-mounted drilling rig adopting the mode of hydraulic control and hydraulic drive has the problems of non-intuitive displaying of control parameters and many pipelines, which is hard to achieve the closed-loop control. In case of drilling into the complex formations, the response speed of the driller is often difficult to adapt to changes in working conditions, which is not conducive to the drilling safety. In order to meet the requirements of safety and high automation of rescue …
Key Technologies Of Surface Efficient Life Support Hole Forming For Mine Rescue, Zhang Biao, Kang Yuguo, Huang Yong, Zhang Ming, Zhou Guang, Ren Yingju, Liu Jianlin, Gao Ke, Zhao Yan
Key Technologies Of Surface Efficient Life Support Hole Forming For Mine Rescue, Zhang Biao, Kang Yuguo, Huang Yong, Zhang Ming, Zhou Guang, Ren Yingju, Liu Jianlin, Gao Ke, Zhao Yan
Coal Geology & Exploration
The surface life support hole, as the support channel for the trapped people underground, is one of the important ground emergency rescue schemes for the situation with some people trapped underground due to mine accidents. Under the complex conditions of the rescue area, including easy collapse, easy leakage, large water inflow and inclined formation, the single hole forming process has the problems such as poor ground adaptability matching, low comprehensive drilling efficiency and difficult roadway penetration, which cannot meet the requirements of rescue. In order to form an efficient drilling technology system for life support holes and improve the response …
Application Of Pneumatic Dth Hammer In Drilling Rescue Of Mine Accidents, Zhao Jiangpeng, Hao Shijun
Application Of Pneumatic Dth Hammer In Drilling Rescue Of Mine Accidents, Zhao Jiangpeng, Hao Shijun
Coal Geology & Exploration
As an efficient percussive rock breaking tool, pneumatic down-the-hole (DTH) hammer has played an important role in drilling rescue of mine accidents at home and abroad. Herein, the technical characteristics of pneumatic DTH hammer were described from the points of rock breaking mechanism, structure type, drilling method and specification, and the reverse circulation type and its characteristics of pneumatic DTH hammer were emphatically analyzed. Besides, the application of forward circulation drilling of pneumatic DTH hammer and the combined deviation correction drilling of pneumatic DTH hammer and mud screw in small diameter drilling, as well as the research progress of pneumatic …
Research And Application Of Multi-Source Information Detection Technology For Drilling Rescue Of Mine, Zheng Xuezhao, Sun Ziyu, Guo Jun, Zhang Duo, Chen Gang, He Qinjian
Research And Application Of Multi-Source Information Detection Technology For Drilling Rescue Of Mine, Zheng Xuezhao, Sun Ziyu, Guo Jun, Zhang Duo, Chen Gang, He Qinjian
Coal Geology & Exploration
Drilling rescue of mine is a new type of rescue technology. In order to quickly and accurately obtain the information on drilling channel, the location distance of the trapped person and the characteristics of the gas environment in the disaster area during rescue, as well as to realize the two-way video and audio communication between the trapped person underground and the rescue commander on the ground, theoretical research and technical development were conducted with the technical methods such as multi-source information fusion, dual-stream network video service, edge computing, intrinsically-safe circuit control, and ultra-wideband radar. Meanwhile, two key technologies were proposed: …
Quantitative Experimental Study On Time-Varying Characteristics Of Bleeding Of Cement-Based Grouting Materials, Zhang Runqi, Xu Bin, Yin Shangxian, Li Shuxia, Chang Yongwang, Lian Huiqing, Cao Min
Quantitative Experimental Study On Time-Varying Characteristics Of Bleeding Of Cement-Based Grouting Materials, Zhang Runqi, Xu Bin, Yin Shangxian, Li Shuxia, Chang Yongwang, Lian Huiqing, Cao Min
Coal Geology & Exploration
Cement-based cementitious materials are the most common grouting materials for grouting engineering. This type of material has obvious water separation effect, and obtaining the quantitative formula of water separation thickness will be helpful to improve the calculation accuracy of slurry diffusion radius. By observing the water separation process of three admixtures, namely pyrophyllite powder (0%-35%), polyvinyl alcohol (0%-8%) and fly ash (0%-90%) in cement-based slurry, the water separating rate, stone formation rate, final water separation time and water separation thickness of the three admixtures were obtained. It is found that the water separation thickness of the slurry varies regularly with …
Key Pretreatment Technologies For Coalbed Gas Bioengineering And Review On Their Mechanism Of Action, Bao Yuan, Chang Jianing, Liu Xiangrong, Xia Daping, Wang Yaya
Key Pretreatment Technologies For Coalbed Gas Bioengineering And Review On Their Mechanism Of Action, Bao Yuan, Chang Jianing, Liu Xiangrong, Xia Daping, Wang Yaya
Coal Geology & Exploration
Coalbed gas bioengineering (CGB) is a new technology for the purpose of realizing the clean utilization of coal resources and the enhanced recovery of coalbed gas. To explore the key characteristics of the pretreatment technologies of CGB, hydrocarbon generation potential and its mechanism of action, conclusion and summary was made for various pretreatment technologies herein. Meanwhile, the pretreatment technologies were divided into three types according to the action mode of coal (organic matter) and bacteria (microorganism): microflora optimization and improvement, coal dissolution and oxidation, and biological stimulation and synergy. By comparing the capability of coal to generate methane through microbial …
Digital Twin Technology Of Geological Information In Mining And Excavation Working Face, Li Peng, Cheng Jianyuan
Digital Twin Technology Of Geological Information In Mining And Excavation Working Face, Li Peng, Cheng Jianyuan
Coal Geology & Exploration
The mine geology transparency is the basis for the intelligent coal mine construction. 3D geological modeling is an important measure for realizing the mine geology transparency. In the geological modeling of the previous working face, there are problems including the discrepancy between the interpolation algorithm and the geological law, the low fusion level of the multi-source heterogeneous geological data, and the seldom coupling between the coal mine production equipment and the geological information. The concept of the digital twin of the geological information about coal mine working face was proposed, the discrete smooth interpolation (DSI) algorithm was adopted, and the …
Subgrade Subsurface Anomalous Body Full-Waveform Inversion Based On Ground-Penetrating Radar, Hu Leilei, Chen Kang, Huang Dejun, Yang Rong
Subgrade Subsurface Anomalous Body Full-Waveform Inversion Based On Ground-Penetrating Radar, Hu Leilei, Chen Kang, Huang Dejun, Yang Rong
Coal Geology & Exploration
The hidden dangers of road collapse and underground voids are usually difficult to notice and easy to occur in sudden. They have caused huge losses in people's lives and properties. Therefore, the detection and analysis of road collapse and underground voids are crucial. The ground-penetrating radar (GPR) is the main method for detecting the hidden dangers of urban road collapse currently by virtue of its high accuracy, high efficiency, continuous non-destructiveness and real-time imaging. A convolution type objective function FWI algorithm was proposed to solve the problem of the lower inversion accuracy and practicability caused by the inaccurate estimation of …
Formation Mechanism Of Coalbed Methane In Dafosi Mine Field, Huanglong Coalfield, Liu Kaide, Yao Kaiwen, Chen Nengyuan, Fan Zhangqun, Li Shujia, Zheng Han, Yue Wenping, Li Xiaolong
Formation Mechanism Of Coalbed Methane In Dafosi Mine Field, Huanglong Coalfield, Liu Kaide, Yao Kaiwen, Chen Nengyuan, Fan Zhangqun, Li Shujia, Zheng Han, Yue Wenping, Li Xiaolong
Coal Geology & Exploration
Dafosi mine field is a typical low-rank coalbed methane (CBM) field in Binchang mining area of Huanglong Jurassic. There are many coalbed methane wells in the field, but few researches are performed on the formation mechanism of coalbed methane. Thus, it is of great guiding significance to clarify the geochemical characteristics and formation mechanism of coalbed methane (CBM) in the mine field, which could provide important basis for the analysis on productivity difference of high- and low-yield CBM Wells. For this reason, the samples of drained gas at the wellhead of six CBM wells, 22 coal samples of No.4 coal …