露天地下联合开采边坡的稳定性及时效性研究  

Study on the Stability and Timeliness of Slope Mining by the Combination of Open Pit and Underground

作　　者：王创业 李俊鹏 刘伟 张琪 

机构地区：[1]内蒙古科技大学矿业研究院,内蒙古包头市014010

出　　处：《矿业研究与开发》2017年第12期107-110,共4页Mining Research and Development

基　　金：国家自然科学基金项目(51464036;51564048)

摘　　要：针对安太堡露天矿及安家岭井工二号井露天地下联合开采井采塌陷下边坡的稳定性及时效性问题,利用相似模拟物理实验,对该矿露天边坡的沉降及变形和在采掘过后不同时间内的变形进行研究,结果表明:井采条件下,露天边坡在不同开采距离下沉降和变形是不同的,开采长度越大,地表沉降和变形越大,最大沉降值为0.58 m;当开采扰动达到一定强度时,采空区上覆主关键层发生破断,坡体稳定性降低,坡体存在剪切断裂危险;在井采达到采掘临界线以后,随着时间的变化,坡体沉降和变形是不同的,时间越长沉降和变形越大,直到达到平衡状态时才会终止。Aimed at the stability and timeliness problems of the slope under the condition of the mining collapse by the combination of open pit and underground in the Antaobao stripe mine and at No.2 well of Anjialing, the sedimentation and deformation of this slope were studied by the physics experiments of similar simulation, as well as the deformations at the different time after excavation. The results showed that under the condition of well mining, the sedimentations and deformations of the open-pitslope were different at different mining distances, and the longer the mining length was, the larger the surface sedimentation and deformation were, with the maximum sedimentation value of 0.58 m. When the mining disturbance reached at a certain strength, the primary key stratum upon the goal broke down. Thus, the stability of the slope was reduced and the slope was threaten by shear failure. When the mining critical line of underground mining was reached, the settlements and deformations of the slope were changed with time, namely the longer the time was, the larger the settlement and the greater the deformation were, ended up at equilibrium state.

关 键 词：露天地下联合 边坡稳定性 时效性 相似模拟 

分 类 号：TD824.7[矿业工程—煤矿开采]