关键词: 上行开采, 层间岩层, 竖向位移, 数值模拟

Abstract: During the process of the ascending mining in coal mine，the movement and deformation rules of interlayer rock are the key factors to affect the feasibility of ascending mining in coal mines.Taking Tongjialiang Coal Mine as engineering background to study the movement and deformation problem of hard and thick strata，and combining the occurrence of coals，mining condition，physical mechanical properties and characteristics of strata，the movement and deformation rules in 8# coal seam were analyzed by numerical simulation.The results showed that the vertical displacement of interlayer rock located at the rear of ascending mining working face became larger with the advancing，and the vertical displacement of interlayer rock located in front of the working face increased first and then decreased.The influence of second mining at ascending mining working face becomes small with the depth of rock strata increasing，and the vertical displacement and plastic damage area of interlayer rock decrease.The research results provide a theoretical basis for judging the feasibility of ascending mining.