Study On The Prevention And Control Of Surface Water And The Rule Of Surface Displacement Induced By Coal Mining On Guan Cen Mountain 13102 Working Face

At present,coal mining industry is in full swing in China,and coal is widely used,which means that coal mining will lead to the development of national economic construction,at the same time,due to coal mining,mine rock mass stress redistribution,this will lead to deformation of the rock,and a series of change,if not timely take measures in the process of mining,it will be bound to affect the safety of coal mining.For example:In the mining process,if not using surface water prevention and control measures,surface water will be collected in the goaf collapse pit,or supply to other aquifer,even through cracks into mine,which will cause the floods.At the same time,for shallow buried thick coal seam,mining often causes a large amount of surface subsidence and surface cracks,which can easily lead to the danger of air leakage and be harmful to coal mine safety exploitation.This paper is based on the research project of surface water control measures on 13102working face of Zhengxing Coal Industry,using numerical simulation to predict the ground subsidence induced by coal mining on Guan Cen Mountain 13102 working face,and determined the surface subsidence area,settlement amount and the development height of the caving zone and the hydraulic fracture zone,analyzed the development scope of surface crack,and proposes a set of drainage measures for surface water and the management method of surface crack.The main work and research results are as follows:?1?Using the FLAC^3D software,six models of coal seam mining thickness were set up in six models:3m,5m,7m,9m,11m,13m,which obtained the surface displacement value and influence radius are obtained,and the relationship between the influence radius and mining thickness.?2?By numerical simulation,the development height of the the caving zone and the hydraulic fracture zone in the goaf is obtained,the development height of this two zones is about 108m at full completion,secondly,study mine hydrogeology,combined with analysis of the research area of contact with water,and to predict mine drainage water level variation caused by each aquifer on surface water seepage research areas on the basis of risk assessment.?3?Based on the surface movement regularity analysis and the analysis of hydrogeology,according to the actual landform features,analysis of the surface crack development situation,and surface water of row cutting measures and ground fissure filling pressure are put forward.