Abstract
In our country, the Yellow River Basin ecological protection and development are put forward under the background of high quality. Among the 14 large-scale coal bases in our country, 9 coal bases are located in the Yellow River Basin, and the Shenfu-Dongsheng Coalfield, which is currently the largest under development, is located here. The region is in the process of coal mining, and the movement of overlying strata will cause the stress redistribution and coal seam in overlying aquifers also due to the effect of pore water pressure along the seepage of rock fracture and damage of overlying aquifer, so in the same formation, stress and the coupled action of seepage flow will produce mutual influence. This article through the early stage of the theoretical results discussed the application of numerical simulation method for simulating 2301 face, and the effect of stress on seepage is concluded. It is proved that the numerical simulation analysis has an important reference value for the coupling problem of stress and seepage. At the same time, the protective mining of aquifers is the basic condition for the surface ecological protection of the area, and it also provides a theoretical basis for the restoration of the ecological environment in the coal mining areas of the Yellow River Basin.
Highlights
China’s Yellow River Basin is rich in coal resources; nine of the 14 large coal bases in our country coal base distribution are in the China Yellow River Basin’s many Dongsheng Coalfields which are located in the western Inner Mongolia, and the development of one of the biggest piece of coal is in the northern Shanxi Province, which has simple mining geological conditions; the surface has the salient feature of the fragile ecological environment
In the edge of Maowusu desert and the Loess Plateau, sparse vegetation and wind erosion are serious, and most of the areas covered by thick windblown sand; the main aquifer of quaternary system of Sarah WuSu group is an unconformable contact on the Jurassic bedrock; the aquifer is the survival of the whole region water system; water is very precious, mainly by the surface precipitation to supply; we have a clear understanding that the development of coal should not be at the expense of the destruction of the local ecological environment, especially in the northwest of Yulin and Ordos region; the region is an arid region, there is little rain, wind is big, and the ecological environment is very frail [1,2,3,4]
It is well known that the traditional coal mining causes damage of the underground rock mass structure, under the action of mining pressure and the movement of the overburden; the phenomenon such as fracture and overburden belongs to the discontinuous medium rock at the top of the aquifer in discontinuous medium flow, which we referred to as percolation, but due to coal mining, the influence of stress of rock mass will redistribute; it will inevitably affect the formation of the fissure zone of rock mass, which affects fluid seepage in rock mass; in the mining area, ecological restoration, protection, and restoration of aquifer are crucial
Summary
China’s Yellow River Basin is rich in coal resources; nine of the 14 large coal bases in our country coal base distribution are in the China Yellow River Basin’s many Dongsheng Coalfields which are located in the western Inner Mongolia, and the development of one of the biggest piece of coal is in the northern Shanxi Province, which has simple mining geological conditions; the surface has the salient feature of the fragile ecological environment. It is well known that the traditional coal mining causes damage of the underground rock mass structure, under the action of mining pressure and the movement of the overburden; the phenomenon such as fracture and overburden belongs to the discontinuous medium rock at the top of the aquifer in discontinuous medium flow, which we referred to as percolation, but due to coal mining, the influence of stress of rock mass will redistribute; it will inevitably affect the formation of the fissure zone of rock mass, which affects fluid seepage in rock mass; in the mining area, ecological restoration, protection, and restoration of aquifer are crucial. 1.2 the computer numerical simulation method commonly used in the field of geotechnical science is used to analyze this kind of problem, which has very important significance [5,6,7,8]
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