露天煤矿边坡相对稳定性判据研究与应用  

Research on slope relative stability criterion and its application in open-pit coal mine

作　　者：王东[1] 姜聚宇 刘帅 韩新平[1] 曹兰柱[1] 宋子岭[1] WANG Dong;JIANG Juyu;LIU Shuai;HAN Xinping;CAO Lanzhu;SONG Ziling(College of Mines,Liaoning Technical University,Fuxin Liaoning 123000,China;Production Technology Department,Inner Mongolia Energy Generation Investment Group,Xilinhot Inner Mongolia 026000,China)

机构地区：[1]辽宁工程技术大学矿业学院,辽宁阜新123000 [2]内蒙古能源发电投资集团生产技术部,内蒙古锡林浩特026000

出　　处：《中国安全科学学报》2018年第7期76-81,共6页China Safety Science Journal

基　　金：国家自然科学基金重点资助(U1361211);国家自然科学基金资助(51474119)

摘　　要：针对软岩露天矿边坡滑坡数量多、规模大、难于防治的问题,以白音华1号露天矿东南帮顺倾软岩边坡为工程背景,基于极限平衡理论,确定边坡滑体几何形态,通过滑坡变形反分析获取弱层指标参数;采用FLAC3D数值模拟,揭示边坡岩土体应力-应变演化规律及破坏机制,提出边坡相对稳定性判据,进而确定合理的横采内排追踪距离与降深位置。结果表明：该矿东南帮边坡稳定性随留煤柱宽度的增加逐渐增大,随追踪距离的增加逐渐降低;当留煤柱宽度大于或等于180 m,追踪距离在50-300 m范围内时,东南帮可以安全降深;留煤柱宽度取180 m,追踪距离取50 m,可实现资源采出最大化。The quantity and scale of slope landslide in soft rock open-pit mine is large,and it is difficult to prevent and govern the landslide,aiming at such a problem,the inclined soft rock slope of the southeast in Baiyinhua 1# open-pit mine is taken as the background,on the basis of the theory of limit equilibrium,the geometric shape of slope sliding body is determined,the method of obtaining index parameters of weak layer by back analysis of landslide deformation is given. FLAC3 Dis used to reveal stress-strain evolution law and failure mechanism of rock and soil mass of the slope,the criterion of slope relative stability is proposed,the reasonable tracing distance and drawdown position are selected. The results show that： the stability of the slope in the southeast side of the mine increases with the increase of the width of the coal pillar,and decreases with the increase of the tracing distance. When the width of the coal pillar is greater than or equal to 180 m and the tracking distance is within the range of 50-300 m,the southeastern slope can be safely deepened. The width of coal pillar is 180 m and the tracking distance is 50 m,which can maximize the exploitation of resources.

关 键 词：露天煤矿 顺倾软岩边坡 降深位置 追踪距离 边坡稳定性 

分 类 号：X936[环境科学与工程—安全科学]