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Articles 2071 - 2100 of 4587
Full-Text Articles in Mining Engineering
Evaluation Of Coalbed Methane Extraction Effect Based On 3d Geological Modeling Technology: An Example Of Sihe Mine In Jincheng City, Jiang Zaibing, Yang Jianchao, Li Yong, Pang Tao
Evaluation Of Coalbed Methane Extraction Effect Based On 3d Geological Modeling Technology: An Example Of Sihe Mine In Jincheng City, Jiang Zaibing, Yang Jianchao, Li Yong, Pang Tao
Coal Geology & Exploration
Three-dimensional geological modeling can intuitively and visually evaluate the effect of coalbed methane(CBM) dynamic drainage, and provide guidance for subsequent adjustments to development plans. With the help of 3D geological modeling software, No.3 Coal Seam of west-second panel is taken as the research object. A geological model that can reflect the spatial geometric changes and structural characteristics of coal seams, and the dynamic changes of coal reservoir attribute parameters is established based on the analysis of geological and productivity data and numerical simulation, to realize the dynamic evaluation of the CBM extraction effect in the study area. The constructed three-dimensional …
Geochemical Characteristics And Significance Of Water Produced By Coalbed Methane Wells In Lu’An Mining Area, Hua Mingguo, Tian Lin, Zhang Yan, Li Jia, Cao Yongheng
Geochemical Characteristics And Significance Of Water Produced By Coalbed Methane Wells In Lu’An Mining Area, Hua Mingguo, Tian Lin, Zhang Yan, Li Jia, Cao Yongheng
Coal Geology & Exploration
Hydro-geochemistry analysis is an important method for CBM exploration and development research. In this paper, the distribution characteristics of salinity, H/O stable isotope and ion concentration in sample water was investigated, and the optimal CBM development area was analyzed by the characteristics of regional structural distribution and the CBM development history. The testing water was from the No.3 CBM well of the Shanxi Formation Permian system in the Lu’an Mining area in the south-central part of Qinshui Basin. The results show that there are three high salinity areas in the mining area, with an average groundwater salinity of 2 000-3200 …
Characteristics Of Roof Water Inflow And Control Technology For High Intensity Mining In Dongsheng Mining Area，Shenfu Coalfield, Xu Feng, Jin Dewu, Yang Maolin, Wang Shidong, Huang Huan, Dang Yakun
Characteristics Of Roof Water Inflow And Control Technology For High Intensity Mining In Dongsheng Mining Area，Shenfu Coalfield, Xu Feng, Jin Dewu, Yang Maolin, Wang Shidong, Huang Huan, Dang Yakun
Coal Geology & Exploration
In view of the threat of roof water disasters in coal mining in western China, the water inflow data of 50 working faces are counted in Dongsheng Mining Area of Shenfu Coalfield, and five typical water inflow characteristics are summarized, which are dynamic recharge-led sustained growth type, the increasing first and then stabilizing type with “dynamic-static” reserves acting together, continuous stability of micro inflow, differential hydrogeological conditions locally prominent type, and the increasing first and then decreasing type dominated by static reserves. According to the law of each type of water inrush, the corresponding ideas and measures of water disaster …
Water Inrush Warning System Of Deep Limestone In Panxie Mining Area Based On Multi-Source Data Mining, Bi Bo, Chen Yongchun, Xie Hao, An Shikai, Xu Yanfei
Water Inrush Warning System Of Deep Limestone In Panxie Mining Area Based On Multi-Source Data Mining, Bi Bo, Chen Yongchun, Xie Hao, An Shikai, Xu Yanfei
Coal Geology & Exploration
Under the long-term water-rock interaction, the hydrochemical composition of deep limestone water in each aquifer is different. Such factors as crustal movement and mining influence have led to the hydraulic connection between aquifers. Major water inrush accidents often occur when the deep high-pressure limestone water bursts into the mine with the shallow limestone water as a channel. On the basis of water level data of 182 surface hydrological observation holes in nine coal mines in Panxie Mining Area of Huainan Coalfield from 2015 to 2018, and the temporal and spatial law of water level change of each hydrological observation hole …
Mechanical Properties And Acoustic Emission Characteristics Of Sandstone Under Natural And Saturated Conditions, Zhang Yin, Li Zhe, Song Shikang, Zhao Yi, Li Hao
Mechanical Properties And Acoustic Emission Characteristics Of Sandstone Under Natural And Saturated Conditions, Zhang Yin, Li Zhe, Song Shikang, Zhao Yi, Li Hao
Coal Geology & Exploration
In order to study the mechanical properties and acoustic emission (AE) characteristics of sandstone with different grain sizes in the process of damage and failure under saturated and natural conditions, we carried out uniaxial compression tests and AE tests on three kinds of sandstone under saturated and natural conditions to study the mechanical properties and AE characteristics under the uniaxial stress state. The test results show that the average compressive strength of coarse-grained sandstone, medium-grained sandstone, and fine-grained sandstone are 54.23 MPa, 53.56 MPa, 59.46 MPa respectively under natural conditions, and 35.62 MPa, 31.79 MPa and 29.10 MPa under saturated …
The Reflected Radio Wave Method For Detecting Coal Seam Faults In Mining Face, Gu Huanqi, Wu Rongxin, Shen Guoqing, Hu Ze
The Reflected Radio Wave Method For Detecting Coal Seam Faults In Mining Face, Gu Huanqi, Wu Rongxin, Shen Guoqing, Hu Ze
Coal Geology & Exploration
Mine radio wave exploration can be used for coal seam geological structure exploration. With its advantages of portability and good effect, it has become a conventional and necessary means for coal seam geological structure exploration. At present, the energy attenuation of radio wave signal in coal seam is fast, and the transmission radio wave detection of working face is restricted in large width coal seam. On this basis, the radio wave reflection exploration method of coal seam working face is proposed. Firstly, the electric model of two-dimensional coal measure strata is constructed by numerical simulation to analyze the field strength …
Detection Performance Of The Azimuthal Electromagnetic Wave Logging Instrument At Coal-Rock Interface In Horizontal Wells, Zhang Yi, Kang Zhengming, Feng Hong, Han Xue, Li Fei, Li Xin
Detection Performance Of The Azimuthal Electromagnetic Wave Logging Instrument At Coal-Rock Interface In Horizontal Wells, Zhang Yi, Kang Zhengming, Feng Hong, Han Xue, Li Fei, Li Xin
Coal Geology & Exploration
The advance and accurate identification of coal-rock interfaces is one of the key technologies to realize intelligent mining, improve mining efficiency and reduce cost. Azimuthal electromagnetic wave logging has achieved good results in lithologic interface identification of petroleum logging, but the identification of coal-rock interface is seldom studied. For the purpose of studying the applicability and detection performance of azimuthal electromagnetic wave in the coalfield logging environment, the one-dimensional generalized reflection coefficient method is used to calculate the magnetic field component, and the fast Hankel transform is used to accelerate the integral calculation speed. What is more, the effects of …
Development Of A Methane Concentration Monitoring Sensor In Underground Boreholes Of Coal Mines, Cong Lin
Development Of A Methane Concentration Monitoring Sensor In Underground Boreholes Of Coal Mines, Cong Lin
Coal Geology & Exploration
At present, during underground drilling operations in coal mines, the methane concentration monitoring system can only reflect the total drainage volume of methane at the borehole, and cannot observe the effect of methane drainage of a certain section of the borehole. With the increase of the borehole depth for underground methane drainage, the effect of methane drainage changes greatly along the length of the borehole. There is a big difference in the effective extraction radius at different hole depths, leading to greater difficulty in arranging the boreholes for methane extraction, and increased uncertainty. In response to this problem, a methane …
Acoustic Emission Characteristics And Fracture Response Behavior Of Hard Rock-Like Material Under Influence Of Loading Rate, Zhang Zekun, Song Zhanping, Cheng Yun, Huo Runke, Song Wanxue, Wang Kuisheng, Wang Tong, Yang Tengtian, Liu Wei
Acoustic Emission Characteristics And Fracture Response Behavior Of Hard Rock-Like Material Under Influence Of Loading Rate, Zhang Zekun, Song Zhanping, Cheng Yun, Huo Runke, Song Wanxue, Wang Kuisheng, Wang Tong, Yang Tengtian, Liu Wei
Coal Geology & Exploration
For the purpose of clarifying the correlation between Acoustic Emission(AE) and rupture response characteristics and loading rate in the failure and instability of hard rocks, uniaxial compression tests and acoustic emission tests were conducted on hard rock-like material samples at different loading rates to analyze the characteristics of mechanical parameters, AE phenomena and rupture response characteristics of hard rock-like material, and to obtain the early warning information of the rock failure based on the information on AE parameters. The results show that the peak strength, elastic modulus and peak strain of hard rock-like material have the loading rate effect. The …
Computational Study On The Microscopic Adsorption Characteristics Of Linear Alkylbenzene Sulfonates With Different Chain Lengths On Anthracite Surface, Xuanlai Chen, Guochao Yan, Guang Xu, Xianglin Yang, Jinfa Dong, Zidong Liang, Shuai Wei
Computational Study On The Microscopic Adsorption Characteristics Of Linear Alkylbenzene Sulfonates With Different Chain Lengths On Anthracite Surface, Xuanlai Chen, Guochao Yan, Guang Xu, Xianglin Yang, Jinfa Dong, Zidong Liang, Shuai Wei
Mining Engineering Faculty Research & Creative Works
In order to explore the influence of different lengths of hydrophobic carbon chains on the diffusion characteristics of surfactants on the surface of anthracite, six linear alkyl benzene sulfonates with different hydrophobic carbon chain lengths were selected (mC, m = 8, 10, 12, 14, 16, 18; m represents the numbers of carbon atoms in the hydrophobic carbon chain), and molecular dynamics (MD) simulations were adopted. Models of surfactant-anthracite, surfactant-graphite layer, and water-surfactant-anthracite were constructed. After analyzing a series of properties such as adsorption energy, diffusion coefficient, radial distribution function (RDF), and hydrophobic tail order parameters, it was found that 12C …
Accident Analysis Of Mining Industry In The United States – A Retrospective Study For 36 Years, Elham Rahimi, Younes Shekarian, Naser Shekarian, Pedram Roghanchi
Accident Analysis Of Mining Industry In The United States – A Retrospective Study For 36 Years, Elham Rahimi, Younes Shekarian, Naser Shekarian, Pedram Roghanchi
Journal of Sustainable Mining
A retrospective study on accident analysis of the United States mines for 36 years was achieved using statistical analysis on the MSHA's accident databases between 1983 and 2018. A regression model of generalized estimation equation (GEE) was used for unbalanced panel data that provided 95,812 observations for 19,924 mine-ID-year in aggregate, coal, metal, and non-metal mines. The contributions of various parameters, including mine type, injured body part, days lost, age, and experience on the rate of accidents and injuries were investigated across the commodity types. The results showed coal miners in the East region are at a higher risk of …
Wettability Alteration Process At Pore-Scale During Engineered Waterflooding Using Computational Fluid Dynamics, Yongqiang Chen, Ping Chang, Guang Xu, Quan Xie
Wettability Alteration Process At Pore-Scale During Engineered Waterflooding Using Computational Fluid Dynamics, Yongqiang Chen, Ping Chang, Guang Xu, Quan Xie
Mining Engineering Faculty Research & Creative Works
Engineered waterflooding modifies chemistry of injected brine to efficiently and environmentally friendly enhance oil recovery. The common practice of engineered waterflooding includes low salinity waterflooding (LSW) and carbonated waterflooding. Among these oil recovery methods, wettability alteration has been perceived as a critical physicochemical process for additional oil recovery. While extensive work has been conducted to characterize the wettability alteration, the existing theory cannot explain the conflict oil recovery between secondary mode (injecting engineered water at the very beginning of flooding) and tertiary mode (injecting engineered water after conventional waterflooding), where secondary engineered waterflooding always gives a greater incremental oil recovery …
Control Of High-Temperature Static And Transient Thermomechanical Behavior Of Simo Ductile Iron By Al Alloying, Semen Naumovich Lekakh, Catherine E. Johnson, L. Godlewski, Mei Li
Control Of High-Temperature Static And Transient Thermomechanical Behavior Of Simo Ductile Iron By Al Alloying, Semen Naumovich Lekakh, Catherine E. Johnson, L. Godlewski, Mei Li
Materials Science and Engineering Faculty Research & Creative Works
Silicon and molybdenum (SiMo) ductile iron is commonly used for exhaust manifolds because these components experience thermal cycling in oxidizing environment, which requires resistance to fatigue during transient thermomechanical loads. Previous studies have demonstrated that alloying elements, such as Al, to SiMo ductile iron reduces the amount of surface degradation during static high-temperature exposure. However, deterioration of sphericity of the graphite nodules and a decrease in ductility could affect the tendency of cracking during thermal cycling. In this article, the effect of Al alloying on static and transient thermomechanical behavior of SiMo ductile iron was investigated to optimize the amount …
Detonation Synthesis Of Nanoscale Silicon Carbide From Elemental Silicon, Martin J. Langenderfer, Yue Zhou, Jeremy Lee Watts, William Fahrenholtz, Catherine E. Johnson
Detonation Synthesis Of Nanoscale Silicon Carbide From Elemental Silicon, Martin J. Langenderfer, Yue Zhou, Jeremy Lee Watts, William Fahrenholtz, Catherine E. Johnson
Materials Science and Engineering Faculty Research & Creative Works
Direct reaction of precursors with the products of detonation remains an underexplored area in the ever-growing body of detonation synthesis literature. This study demonstrated the synthesis of silicon carbide during detonation by reaction of elemental silicon with carbon products formed from detonation of RDX/TNT mixtures. Continuum scale simulation of the detonation showed that energy transfer by the detonation wave was completed within 2–9 μs depending on location of measurement within the detonating explosive charge. The simulated environment in the detonation product flow beyond the Chapman-Jouguet condition where pressure approaches 27 GPa and temperatures reach 3300 K was thermodynamically suitable for …
Fracturing The Rule Of Capture: The Improper Application Of The Rule Of Capture To Subsurface Intrusions Resulting From Hydraulic Fracturing, Alexis K. Désiré
Fracturing The Rule Of Capture: The Improper Application Of The Rule Of Capture To Subsurface Intrusions Resulting From Hydraulic Fracturing, Alexis K. Désiré
Seattle Journal of Technology, Environmental, & Innovation Law
Imagine that during the course of hydraulically fracturing a tract of land—a process used to extract gas from low-permeability rock formations —a drilling company causes fractures, as well as some of the materials necessary to the fracturing process, to cross the boundary of its property line and enter an adjoining property—that is, it makes a subsurface intrusion onto a neighbor’s property. Assume further that, because the company’s fractures have extended into the neighbor’s property, oil and gas from the neighboring land travels to the company’s wellbore, causing the neighbor to bring a tort action against the company for harms related …
Optimum Design Of Half Tunnels For Transportation In The Himalayas, Muhammad Zaka Emad, Muhammad Usman Khan, Muhammad Azeem Raza, Saqib Ahmad Saki, Muhammad Aijaz, Muhammad Usman Tahir
Optimum Design Of Half Tunnels For Transportation In The Himalayas, Muhammad Zaka Emad, Muhammad Usman Khan, Muhammad Azeem Raza, Saqib Ahmad Saki, Muhammad Aijaz, Muhammad Usman Tahir
Mining Engineering Faculty Research & Creative Works
Numerical modeling is a fine tool for the assessment of inaccessible zones or unforeseen conditions in geotechnical engineering. When modeling structures in rocks, the laboratory-determined properties must be factored as per rock mass classification. The joints present in rock mass can be utilized for assessment of wedges forming around the tunnels. Half tunnels or overhanging tunnels are constructed in steep rock slopes through slot cutting. This develops overhanging cliff in hard rocks that looked like a half tunnel. Half tunnels have advantage over conventional tunnels or open excavations as they require less excavation. The current construction practice of half tunnels …
Table Of Contents, The Editors
Application Of Borehole Transient Electromagnetic Method In Detecting The Cross-Border Mining Goaf, Fan Tao, Li Ping, Zhao Zhao, Li Wei, Zhao Rui, Zhang Peng, Yao Weihua, Li Yuteng, Fang Zhe
Application Of Borehole Transient Electromagnetic Method In Detecting The Cross-Border Mining Goaf, Fan Tao, Li Ping, Zhao Zhao, Li Wei, Zhao Rui, Zhang Peng, Yao Weihua, Li Yuteng, Fang Zhe
Coal Geology & Exploration
Cross-border mining in underground coal mines disrupts the order of coal resource development, and has huge hidden safety danger. Accurate detection of goafs caused by cross-border mining and their boundaries is extremely important for safe mining. Conventional mine transient electromagnetic detection methods are susceptible to interference from metal and electromagnetic signals in the roadway, and its detection accuracy is limited, which makes it difficult to meet the needs of accurate interpretation of goaf boundary. For the purpose of solving this problem, a drilling transient electromagnetic method and construction technology for transmitting and receiving signals in drilling is proposed to increase …
Research On Key Technologies Of The Zdy25000ldk Intelligent Directional Drilling Equipment, Fang Peng, Yao Ke, Wang Longpeng, Zhang Rui, Meng Rui, Wang Song, Shao Junjie, Liu Pu
Research On Key Technologies Of The Zdy25000ldk Intelligent Directional Drilling Equipment, Fang Peng, Yao Ke, Wang Longpeng, Zhang Rui, Meng Rui, Wang Song, Shao Junjie, Liu Pu
Coal Geology & Exploration
It is the most direct and effective method to extract coalbed methane by drilling along the coal seam and high-level drilling on the roof for comprehensive treatment of coalbed methane in underground coal mines. Improving the drilling speed of directional drilling and the drilling encounter rate in the coal seam of uneven thickness with large fluctuation, reducing the labor intensity of the personnel, enhancing the ability to prevent drilling accidents, and adapting to the intelligent development needs of coal mines, the intelligent drilling equipment for long-distance directional drilling in coal mines are all the important problems to be solved in …
Design And Implementation Of The Geological Guarantee System Architecture Based On Microservices, Li Peng, Cheng Jianyuan
Design And Implementation Of The Geological Guarantee System Architecture Based On Microservices, Li Peng, Cheng Jianyuan
Coal Geology & Exploration
The geological guarantee system is very important for safety production in coal mines. In view of the problems faced by the software development of the system, such as diverse data sources, inconsistent language for integrated development of the geological monitoring system and poor adaptability of the geological support platform in different coal mines caused by customized software development, a three-tier development architecture of the geological support system based on microservices is proposed, which includes an application tier, a platform tier and an infrastructure tier. On the basis of the microservices, the integrated development process of the geological support system is …
Influential Factors Of The Electromagnetic Wave Instrument While Drilling In Coal Seam Horizontal Wells And Resistivity Simulation Calculation, Chen Gang, Zhang Jiguan, Li Quanxin, Liu Zhiyi
Influential Factors Of The Electromagnetic Wave Instrument While Drilling In Coal Seam Horizontal Wells And Resistivity Simulation Calculation, Chen Gang, Zhang Jiguan, Li Quanxin, Liu Zhiyi
Coal Geology & Exploration
In order to figure out the influential factors of the detection by the electromagnetic wave instrument while drilling in coal seam horizontal wells, we studied the impacts of roof and floor surrounding rock resistivity, instrument eccentricity, coal seam borehole collapse and coal seam thickness on the measurement of resistivity through finite element numerical simulation. The resistivity response law of the amplitude ratio and phase difference calculation under the condition of high-resistivity coal rock formation was analyzed. On this basis, a three-layer geological mathematical model was established to simulate the difference between analytical and numerical solutions of the amplitude ratio and …
Optimization Of Surface Directional Wells For Water Control Based On Three-Dimensional Seismic Dynamic Geological Modeling, Lu Ziqing, Gao Yaoquan, Guo Yuan
Optimization Of Surface Directional Wells For Water Control Based On Three-Dimensional Seismic Dynamic Geological Modeling, Lu Ziqing, Gao Yaoquan, Guo Yuan
Coal Geology & Exploration
In the treatment of high-pressure Ordovician limestone water in the coal seam floor, the design and construction optimization of surface directional wells mainly relies on two-dimensional AutoCAD geological drawings. For the avoidance of such problems as low drilling rate and off-target in the target area under complex geological conditions, and to improve the effect of precise targeted water hazard control, a technology for optimizing directional wells for water hazard prevention and control based on seismic dynamic modeling is proposed. By comparing and analyzing the current situation and problems of drilling trajectory design and optimization technology, it is pointed out that …
Prevention And Control Technology Of Ordovician Water In Tangjiahui Coal Mine Based On Transparent Geology, Gao Yaoquan, Gao Yingui, Lu Ziqing, Kong Wanjun
Prevention And Control Technology Of Ordovician Water In Tangjiahui Coal Mine Based On Transparent Geology, Gao Yaoquan, Gao Yingui, Lu Ziqing, Kong Wanjun
Coal Geology & Exploration
The problems of many water diversion faults and, concealed water diversion structure have led to the difficulty of water disaster prevention and control of Ordovician limestone in No.6 coal seam in Tangjiahui Coal Mine. After continuous exploration and practice, a variety of advanced technologies has been introduced to obtain a large number of geological and hydrogeological data, and construct an intelligent geological guarantee system. The technical ideas of “geophysical and drilling exploration, joint grouting treatment up-hole and down-hole, in-hole transient electromagnetic fine exploration, inter-hole resistivity detection of grouting effect, and joint monitoring of coal seam floor by micro-seismic and electromagnetic …
Construction Method Of Transparent Working Face Based On Borehole Radar, Jiang Bici, Cheng Jianyuan, Li Ping, Liu Wenming, Yu Junhui, Wu Guoqing
Construction Method Of Transparent Working Face Based On Borehole Radar, Jiang Bici, Cheng Jianyuan, Li Ping, Liu Wenming, Yu Junhui, Wu Guoqing
Coal Geology & Exploration
The high-precision detection of coal rock interface is the key and difficult point to construct the three-dimensional geological model of intelligent mining. A method is proposed to construct regional coal rock interface geological model and realize transparent working face by using single hole reflection radar in the hole along coal seam and multi hole detection results. For single borehole radar data, the coal seam radar wave velocity is calculated by using the slope of roadway wave in-phase axis, and the spatial constrained migration imaging is used to realize the accurate calculating of coal seam top/floor reflection interface. Three transparent working …
Construction Method On Transparent Geological Guarantee Technologies: A Case Study Of Wuhai Mining Area, Gu Baoze, Dai Zhenhua, Li Mingxing, Chen Baohui
Construction Method On Transparent Geological Guarantee Technologies: A Case Study Of Wuhai Mining Area, Gu Baoze, Dai Zhenhua, Li Mingxing, Chen Baohui
Coal Geology & Exploration
Coal geological guarantee technologies are applied in the whole life cycle of the coal industry. The technologies are the basis and premise of realizing safe, efficient, intelligent and green mining of coal resources, and plays a key role in disaster prevention, hidden disaster-causing factor detection and intelligent mining of coal. Without any doubt, geological transparency is the crucial task to improve the ability of intelligent analysis and decision-making, automatic and precise control, and efficient coal mining. For the purpose of solving the problems faced by Wuhai Mining Area in the construction of coal mine intellectualization, such as complex geological conditions …
Feasibility Study Of The Metaverse Technology In Coal Mine Emergency Training And Drills, Guo Yangyang
Feasibility Study Of The Metaverse Technology In Coal Mine Emergency Training And Drills, Guo Yangyang
Coal Geology & Exploration
Coal mine safety training and emergency drills are effective measures to prevent disasters and accidents. At this stage, however, there are problems such as the boring training content, drills emphasizing “performance” rather than “practice”, and formalism. Metaverse technology integrates VR, AR, 3D, blockchain, Internet of things, AI, digital twin and other technologies, therefore, it is characterized by intuitiveness, strong interaction and high knowledge conversion rate in coal mine safety training and emergency drills, which can well solve the above problems. Now the metaverse technology is increasingly mature from hardware, software to various supporting facilities, while it is still faced with …
Construction And Demonstration Of The Transparent Geological Guarantee System In Tangjiahui Coal Mine, Liu Jiegao, Cheng Jianyuan, Shu Yiguo, Liu Zaibin, Gao Yingui, Gao Yaoquan, Lu Ziqing
Construction And Demonstration Of The Transparent Geological Guarantee System In Tangjiahui Coal Mine, Liu Jiegao, Cheng Jianyuan, Shu Yiguo, Liu Zaibin, Gao Yingui, Gao Yaoquan, Lu Ziqing
Coal Geology & Exploration
The intelligence construction of Tangjiahui Coal Mine is confronted with constrains such as water-conducting faults and pressure of Ordovician limestone water, and how to make the geological conditions transparent has become the technical bottleneck of intelligent mining. Tangjiahui Coal Mine puts emphasize on the prevention and control of water disasters and adopted five advanced technologies, including borehole transient electromagnetic technology, multi-borehole resistivity, seismic while excavating, seismic while mining, microseismic monitoring to build a real-time dynamic transparent geological guarantee system. The system realizes the prevention and control of water disasters, rapid excavation and intelligent mining based on transparent geological models, which …
Characteristics And Detection Performance Of The Source Of Seismic While Excavating In Underground Coal Mines, Wang Baoli, Cheng Jianyuan, Jin Dan, Yang Xiaogang, Yang Hui
Characteristics And Detection Performance Of The Source Of Seismic While Excavating In Underground Coal Mines, Wang Baoli, Cheng Jianyuan, Jin Dan, Yang Xiaogang, Yang Hui
Coal Geology & Exploration
Against a background of intelligent coal mines, seismic while excavating has become one of the key geological guarantee technologies for safe excavation in the mining face. It can detect hidden geological structures in real-time, in advance and finely, such as goafs, faults, and collapsed columns, effectively promoting safe and efficient excavation and production. Different from the widely used advanced detection technology of reflection in-seam wave, the vibration signal of the tunneling machine is used as the excitation source, which replaces the explosive source in conventional seismic exploration. It has the advantages of environmental frendliness, safety, low cost, recyclability and combined …
Application Of Reflected In-Seam Wave Detection For Small Faults In Thick Coal Seams, Su Xiaoyun
Application Of Reflected In-Seam Wave Detection For Small Faults In Thick Coal Seams, Su Xiaoyun
Coal Geology & Exploration
In general, the fault distance and extension length of small faults in the working face of thick coal seams and extremely thick coal seams are short. Due to the limitation of resolution, it is generally difficult to detect such small faults with current methods and instruments. The unclear detection of small faults will have a great impact on the efficient recovery of the intelligent working face. To solve this problem, the numerical simulation and field experiment of small fault reflected in-seam wave detection in the thick coal seam are carried out. In terms of numerical simulation, the three-component elastic wave …
Application Research On Dynamic Calibration And Prediction Technology Of Coal Seam In Coalmine Working Face, Liu Wenming, Gao Yaoquan, Jiang Bici, Li Peng, Xue Wuqiang
Application Research On Dynamic Calibration And Prediction Technology Of Coal Seam In Coalmine Working Face, Liu Wenming, Gao Yaoquan, Jiang Bici, Li Peng, Xue Wuqiang
Coal Geology & Exploration
One of the prominent problems of intelligent mining is its inadaptability to geological conditions, especially for the absolute accuracy of coal seam floor and thickness. 3D seismic has a high horizontal resolution and it can control the ups and downs of the coal seam. However, due to the time domain data, the calculation of the coal seam floor elevation is negatively affected by the time-depth conversion point. On the basis of the 3D seismic data of the working face and the coal thickness data during the mining process, the absolute accuracy of the time-depth conversion of the coal seam floor …