Study On Surface Movement And Surface Water Prevention And Control Measures For Working Faces Of 9504~9508 In Antaibao Mining Area

As an important energy resource,coal is widely used in production and life,which is an important material basis for social development.In the process of underground mining,there are water resources problems such as falling groundwater level,surface water dryness,and geological disasters such as collapse,surface subsidence,fissures,and mine seepage.Due to the mining of coal mines,under the complex physical and mechanical effects of the overlying strata,the rock layers move and the surface sinks.In the process of mining,if no preventive measures are taken,the cracking or even falling of the roof of the mine and the infiltration of surface water into the mine through the cracks in the rock formation will seriously threaten the mine operation and mining safety.This paper is based on the“Study on the prevention and treatment of surface drainage and land reclamation of 9504⁹508 working face in No.3 Well Mining and Mining Area”,dynamically predict the surface movement law caused by mining in the study area,and propose surface water prevention measures and crack treatment schemes for the damage characteristics of rock formation.The main research results of the thesis are as follows:?1?Using the probability integral method and FLAC^3D,the mining process of9504⁹508 working face is calculated in 4 steps,and the horizontal displacement,sinking displacement,tilting displacement and influence radius of the surface are obtained,and the displacement value of the surface is obtained.And the relationship between the radius of influence and the thickness of the mining.?2?Using the empirical formula of the"three procedures"and the numerical simulation calculation method,the deformation and failure of the overlying strata in the goaf are calculated,and the development height of the"two belts"is determined.Combined with the hydraulic linkages between the aquifers in the study area and the prediction of water level changes,the risk assessment of surface water leakage in the study area was carried out.?3?Based on the law of surface movement and hydrogeological conditions,the fracture development of the overlying strata and surface of the goaf is analyzed,and the surface water prevention measures and crack filling schemes are proposed.