宏岩煤矿综放工作面高抽巷合理层位布置研究

Study of High Level Drainage Roadway Reasonable Position of Top Coal Caving Working Face of Hongyan Coal Mine

针对高瓦斯综放工作面瓦斯超限问题,根据宏岩煤矿10101工作面的实际地质条件和开采工艺,基于工作面覆岩破坏高度和高抽巷层位理论,分析认为高抽巷层位理论高度应布置在23～50.5m之内。并通过数值模拟进行验证,得出9+10煤采动后L_4石灰岩以下的岩层全部垮落,垮落带发育高度为21m左右,结合该矿的实际情况确定高抽巷层位布置在6煤中。

To gas transfinite problem of high gas top coal caving working face,according geological situation and mining technical of 10101 working face of Hongyan coal mine,based on overburden broken height of working face and high level drainage roadway position theory,the theoretical height should be arranged within 23~50.5m,and then verified by numerical simulation,the following conclusion was reached that all strata below L 4 limestone would collapsed after 9+10 coal seam was mined,collapse zone development height was about 21m,at last,high level position was layout in No.6 coal seam.