Environmental Geological Chain Of Mining Development And Its Control In Changzhi Basin

The changzhi basin is bounded by the changzhi fault in the east,the coal measures outcrop line in the west,and the wenwangshan barrier in the north of the zhuangtou fault in the south.Since the founding of the People's Republic of China,the large-scale concentrated mining of coal resources has caused a series of environmental geological problems,which not only brings huge economic benefits but also causes pollution and disasters.The environmental geological problems in the region include ground collapse,water resources destruction,vegetation reduction and soil pollution.This paper fully collecting geological data in the study area and the predecessors' research results,on the basis of the theory of environmental geological chain classify environmental geology problems in the research district,USES the analytic hierarchy method to establish evaluation system of the bearing capacity of geological environment in mines,the environmental geological problems involved in the studied area was chosen and a set of index classification standard,and to quantify the various indicators,calculated the index weight value and bearing capacity.1.By combining the theory of mine environmental geological chain with the evaluation of the bearing capacity of mine geological environment,the grade of the bearing capacity of the whole geological environment in the research area is excellent to good except yuwu mining area which is poor and gucheng mining area which is medium.The bearing capacity level of the whole geological environment in the study area is good,and the level affected by mining development is still controllable2.According to the theory of environmental geology chain,the constitutive index of the environmental geology problem is selected,and the development degree of the problem is evaluated by the load value of the environmental geology problem.In the study area,the malignant chain of geological disasters caused by coal mining is the most serious in shigejie,zhangcun and wangzhuang mining areas.Changcun,gucheng and yuwu mining areas have the largest gas problem carrying capacity,which means that the gas problem caused by mining in these three mining areas is more serious than other mining areas,which also conforms to the law that gas occurrence concentration increases with the increase of coal seam burial depth.The bearing capacity of water gusher in yuwu,guozhuang and shigejie mining areas is also larger than that in other mining areas,which represents that the environmental geological malignant chain involving water gusher and water inrush in these three mining areas is more developed.3.In this study,in the hierarchical analysis of environmental geological problems caused by mining,mine water gushing problem occupies the largest weight in the composition of environmental geological problems,followed by geological disasters,and finally the mine gas problem.It indicates that the environmental geological problems related to mine gushing water in the whole research area are the most prominent,followed by geological disasters caused by mining.Therefore,when solving the environmental geological problems caused by mining in this area,it is necessary to first solve the mine water gushing problem with a relatively large weight.