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Height Detection and Analysis of Water Flowing Fractured Zone of Coal Face
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作者 Ziyang Feng 《Computational Water, Energy, and Environmental Engineering》 2021年第4期131-139,共9页
Taking 91105 working face as the research object, the observation method of water flowing fracture<span style="font-family:Verdana;">d</span><span style="font-family:Verdana;"> zo... Taking 91105 working face as the research object, the observation method of water flowing fracture<span style="font-family:Verdana;">d</span><span style="font-family:Verdana;"> zone and the layout of mining holes were determined by analyzing the field geological structure</span><span style="font-family:Verdana;">. </span><span style="font-family:Verdana;">It was shown that the fractured zone height and the ratio given by the measured method were 52.33 and 12.46, respectively. By the numerical simulation method with the software of UDEC, the fractured zone height and the ratio were 42.5 and 10.12. By comparison of measured height data and UDEC numerical simulation, there were some differences between the measured height and the calculated results of UDEC numerical simulation method. The method of simulation can be used as the technical basis for the design of waterproof coal pillar in the future.</span> 展开更多
关键词 water flowing fractured zone Height Detection Fracture Mining Ratio Numerical Simulation
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Optimum Calculation of Coal Pillars in Inclined Weathered Oxidation Zone
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作者 Yingbo Zhang Shi Chen 《Energy Engineering》 EI 2021年第3期707-714,共8页
In the mining process of coal mine,waterproof coal pillars should be set between the weathered oxidation zone and the first mining face.In order to determine the reasonable upper limit of the first mining face of Hong... In the mining process of coal mine,waterproof coal pillars should be set between the weathered oxidation zone and the first mining face.In order to determine the reasonable upper limit of the first mining face of Hongyi Coal Mine,the waterproof coal pillar needs to be wide enough to resist the lateral hydrostatic pressure of the oxidation zone,and to ensure that the top plate aquifer does not run through the water guide crack zone,while also liberating as much stagnant coal as possible.In this paper,the first coal mine face’s waterproof coal pillar was calculated using conventional and optimized calculation methods,taking into account the dip angle of the coal seam,the height of the water-guide crack zone,and the rock shift influence zone,and finally the upper limit of the first face of Hongyi Coal Mine was determined. 展开更多
关键词 efflorescent oxygenized belts upper limit water flowing fractured zone waterproof pillar
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Forecasting water disaster for a coal mine under the Xiaolangdi reservoir 被引量:21
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作者 SUN Ya-jun XU Zhi-min +3 位作者 DONG Qing-hong LIU Sheng-dong GAO Rong-bin JIANG Yu-hai 《Journal of China University of Mining and Technology》 EI 2008年第4期516-520,共5页
Xin’an coal mine, Henan Province, faces the risk of water inrush because 40% of the area of the coal mine is under the surface water of the Xiaolangdi reservoir. To forecast water disaster, an effective aquifuge and ... Xin’an coal mine, Henan Province, faces the risk of water inrush because 40% of the area of the coal mine is under the surface water of the Xiaolangdi reservoir. To forecast water disaster, an effective aquifuge and a limit of water infiltration were determined by rock-phase analysis and long term observations of surface water and groundwater. By field monitoring, as well as physical and numerical simulation experiments, we obtained data reflecting different heights of a water flow fractured zone (WFFZ) under different mining conditions, derived a formula to calculate this height and built a forecasting model with the aid of GIS. On the basis of these activities, the coal mine area was classified into three sub-areas with different potential of water inrush. In the end, our research results have been applied in and verified by industrial mining experiments at three working faces and we were able to present a successful example of coal mining under a large reservoir. 展开更多
关键词 coal mining under surface water water flow fractured zone water inrush of coal mine effective aquifuge forecasting model
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Forecasting of destroyed height of overlying rock with the top coal caving based on ANN
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作者 陈佩佩 《Journal of Coal Science & Engineering(China)》 2008年第2期190-194,共5页
Analyzed the rule of the Water Flowing Fractured (WFF) zone's development during the fully mechanized top coal caving.Six influence factors of WFF's height were selected,viz.mining thickness,base rock thicknes... Analyzed the rule of the Water Flowing Fractured (WFF) zone's development during the fully mechanized top coal caving.Six influence factors of WFF's height were selected,viz.mining thickness,base rock thickness,dip angle,uniaxial compressing strength of roof,mudstone proportion in overlying rock,and structure of overlying rock. The height-forecasting model of WFF was established based on the Artificial Neural Net-work techniques,and was applied in the first fully mechanized top coal caving face under sea in China. 展开更多
关键词 fully mechanized top coal caving artificial neural network water flowing fractured zone
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