CAJ | 학술논문

采用裂隙带发育规律实测、概率积分法预计及 UDEC 数值模拟等手段分析了覆岩运动规律及油页岩变形破坏状态.由分析结果可知,2＃煤层采出后,油页岩位于2＃煤层裂隙带内,但其内部结构破坏不大,可进行上行开采；同时,裂隙带侧向的边界岩层移动距离平均15 m,平均影响角55°,当油页岩距2＃煤层开采边界小于0.5倍开采影响范围时,岩层以拉伸运动为主,产生台阶下沉；在距0.5~1倍开采影响范围时,岩层以滑移运动为主,不利于巷道布置.因此,回采巷道合理的位置应在开采影响范围以外.
채용렬극대발육규률실측、개솔적분법예계급 UDEC 수치모의등수단분석료복암운동규률급유혈암변형파배상태.유분석결과가지,2＃매층채출후,유혈암위우2＃매층렬극대내,단기내부결구파배불대,가진행상행개채；동시,렬극대측향적변계암층이동거리평균15 m,평균영향각55°,당유혈암거2＃매층개채변계소우0.5배개채영향범위시,암층이랍신운동위주,산생태계하침；재거0.5~1배개채영향범위시,암층이활이운동위주,불리우항도포치.인차,회채항도합리적위치응재개채영향범위이외.
This paper analyzes the movement law of the overlying strata and the deformation and failure state of oil shale with the methods of field observation on fissure zone development, probability integral method and UDEC numerical simulation. The analysis results show,oil shale locates in the fissure zone in 2 # coal seam after its mining with little-damaged internal structure, which suits the upward mining;meanwhile,the movement distance of boundary strata located in the lateral of fissure zone is 15m averagely,and the average impact angle is 55°,so when the dis-tance from oil shale to mining boundary of 2 # coal seam is less than 0.5 times of the mining influ-ence scope,rock layer movement is mainly the stretching,and it can form stepped settlement;when the distance is 0.5 ~1 times of the mining influence scope,rock layer movement is given priority to the sliding motion,which is bad for roadway layout. Therefore,the reasonable posi-tion of the roadway should be beyond the mining influenced scope.