厚黏土层对薄基岩工作面矿压规律的影响  

Influence of Thick Clay Stratum on Underground Pressure of Mining Face under Thin Basement Rock

作　　者：邓鹏海 郭良银 张文科[1] 刘昂[1] 游家梁 李朋[1] 

机构地区：[1]中国矿业大学(北京)资源与安全工程学院,北京100083 [2]山东黄金矿业股份有限公司新城金矿,山东莱州261438

出　　处：《煤矿开采》2014年第4期100-102,122,共4页Coal Mining Technology

摘　　要：薄基岩厚黏土层煤层开采时具有与普通薄基岩厚松散层工作面不一样的矿压显现规律,基于赵固二矿的具体地质条件通过UDEC4.0模拟研究了当基岩厚度为0m,30m和60m时工作面初次来压步距、周期来压步距、支承压力分布和上覆顶板岩层垮落形态等,通过模拟得知,黏土层顶板有较小的来压步距,能缓和工作面煤壁前方的支承压力,并能与薄基岩共同成拱或独立成拱用以承担上覆岩层的重量,且厚黏土层以弯曲下沉为主,对于防止地表水侵入工作面也是有利的。There was different underground pressure rule in mining under thin basement rock , thick clay stratum and under ordinary thin basement rock and thick loose bed .On the basis of geological condition of Zhaogu 2nd Mine, applying UDEC to simulating first roof caving pace, periodical weighting pace , abutment pressure distribution and roof caving form when basement rock thickness was 0m, 30m and 60m.Result showed that weighting pace of clay stratum roof was small , and could relax abutment pressure in front of mining face and formed arch itself or with thin basement rock to bear weight of surrounding rock .Thick clay stratum mainly took on bending and subsidence deformation characteristic , which was favorable for preventing ground water entering mining face .

关 键 词：厚黏土层 薄基岩 矿压显现规律 UDEC数值模拟 顶板垮落形态 

分 类 号：TD323[矿业工程—矿井建设]