Study On The Influence Of No.15 Coal Seam Mining On Surface Water In Sijiazhuang Coal Mine

As the main energy source in China,coal plays a leading role in the energy security structure.However,a series of ecological and environmental problems,such as rock breaking,soil erosion and land pollution,are often encountered in the mining process of coal resources,among which the loss of water resources is the most serious.The Yellow River Basin,also known as China’s "energy basin",is rich in coal,oil,natural gas,etc.At present,the proven coal reserves are 449.2 billion tons,accounting for 46.5%of the national coal reserves,and mainly distributed in the upper and middle reaches of the Yellow River Basin,mostly in arid and semi-arid areas,ecological fragile,water shortage.Therefore,ensuring the safety of coal resources development and protecting regional water resources to the maximum extent are the key scientific issues for the high-quality development of coal industry in the Yellow River Basin.This paper,taking shanxi Yang Mei temple home zhuang coal mine safety mining of coal resources and water resources protection as the engineering background,system to study the temple house of no.15 coal seam mining of lady zhuang Guan Quan Yu the influence law of water resources distribution characteristics,test the underlying surface and underground mining area water distribution characteristics,analyzes the process of mining rock fracture and the development law of the ground fissures,discusses the influence of coal mining on the groundwater environment,mining area water environment protection measures are given,the main achievements are as follows:(1)Combined with the actual hydrogeological conditions of mining area,the methods of field investigation and laboratory research,analysis of the water distribution characteristics of the study area,the test and analysis the study area water p H,dissolved oxygen,and copper,zinc,iron,manganese,such as more than 10 background content of heavy metals,the lady Guan Quan Yu water of heavy metal ion concentration,oxide content,basic environmental evaluation indexes such as organic pollutants.(2)Using FLAC3 D software characteristics of roof rock mining simulation,simulation deduction 15 th 15207 working face in mining of coal seam roof displacement in the process of evolution,the law of evolution of surrounding rock stress and the plastic zone of roof distribution,etc.,get the roof height of water flowing fractured zone development for mining for 19.1 times the thickness of coal seam,the15 th coal seam roof water flowing fractured zone height is 65.89 ～ 140.58 m,average height of 97.63 m.(3)The research method combining numerical simulation and field measurement analysis is adopted to analyze the overlying rock movement law and the development height of water-conducting fracture zone during the mining process of working face.The fracture boundary of No.15 coal seam is determined to be 263 m,and the maximum surface subsidence value is 4m.The large well method and water-rich zoning were used to predict the water inflow,and the characteristics of water inflow in the mining process of 15207 working face were obtained,and the drainage pipe and water storage capacity at the bottom of the well were determined to meet the production requirements under the normal mining condition of 15 coal seam.(4)Based on the simulation results,in order to reduce the 15 th coal mining area,in the development of surface cracks,prevent fracture surface subsidence damage to the surface water system,combining with the temple zhuang no.15 coal seam of the specific geological conditions,comprehensive analysis of the abscission layer grouting,coordinated mining,local mining mining mode of surface subsidence and surface crack control effect,and determined the abscission layer grouting method and coordinate mining method is the best solution,implements the surface subsidence in the fracture and the effective control of mine water erosion,and the mining area water resources dynamic monitoring system is designed,the comprehensive utilization of water resources is actualized.The paper includes 38 pictures,12 tables,95 references.