There is a landfill sewage pool on the surface of the No.12203 working face of Xinzheng Coal and Electricity Company.In or-der to maximize the recovery of coal resources and effectively protect sewage pool,the impact of mining on sewage pool was studied and corresponding solutions and measures were proposed.The vertical section method was used to determine the range of protective coal pil-lars for the sewage pool,and the impact range of the mining surface movement deformation angle was calculated to analyze the degree of influence of the working face mining on the sewage pool.The probability integral method was used to calculate and analyze the surface movement and deformation of three mining schemes:overall mining with different thicknesses,limited mining with different widths,and limited mining with different thicknesses.The measure of local area limited thickness of 2.8 m was proposed for the working face.The limited thickness mining area:inclined from the lower roadway to the uphill direction of 30 m,and inclined towards an area 70 to 170 m away from the open-off cut.And by establishing an observation station for the movement and deformation of the sewage pool,monito-ring the surface movement and deformation,analyzing the impact of mining on the sewage pool,and taking corresponding technical meas-ures to provide technical reference.
关键词
地表移动变形/污水池/保护煤柱/概率积分法/限厚开采
Key words
surface movement and deformation/sewage pool/protective pillar/probability integral method/limited thickness mining
维普
万方数据