地下采矿引起地表滑移变形分析  

Analysis for landslide caused by underground mining

作　　者：付华[1] 陈从新[1] 夏开宗[1] 邓洋洋[1] 

机构地区：[1]中国科学院武汉岩土力学研究所岩土力学与工程国家重点实验室,湖北武汉430071

出　　处：《岩石力学与工程学报》2016年第A02期3991-4000,共10页Chinese Journal of Rock Mechanics and Engineering

摘　　要：基于概率积分法对地下采矿引起的岩体变形规律的描述,推导出岩体最大剪切变形和最大拉伸变形的分布曲线,阐述地表出现滑移破坏的原因。结合程潮铁矿地表变形监测成果,进一步说明地下采矿引起的地表滑移变形的条件及特征。最后,采用离散单元法模拟地下开采引起的岩体变形发展过程,阐述地表滑移后岩体的变形趋势。结果表明:在地下开采作用下,岩体中出现的最大剪切变形可使地表发生塌陷,最大拉伸变形可使岩体出现贯通地表的裂缝,在这2个因素共同作用下,地表出现滑移现象。滑移产生后,受影响的地表可分为滑移区和卸荷区,并出现浅部裂缝、深部裂缝和卸荷裂缝,其中,深部裂缝是滑移区和卸荷区的分界线。受地表滑移的影响,在继续开采时,地表在滑移区内的变形程度增大,但地表主要变形范围得到抑制。Based on the description of rock deformation caused by underground mining,the distribution curves of rock maximum shear deformation and maximum tensile deformation were deduced,which can explained the reason of surface landslide. Combine with Chengchao iron monitoring results of surface deformation,the factors and features of landslide caused by underground mining were described detailedly. In order to describe surface deformation trend,finally,UDEC（Universal Distinct Element Code） was used to simulate the development of such rock deformation. It shows that,under the action of underground mining,the maximum shear deformation in rock can lead to the surface subsidence while the maximum tensile deformation can cause cracks through the rock. Under the combined action of above two factors,the landslide appears usually. After that,with Shallow cracks,deep cracks and unloading cracks generating,affected rocks can be divided into slip zone and unloading zone. Among them,deep crack can be seen as the dividing line between slip zone and the unloading zone. Influenced by surface landslide,under the further mining, the surface deformation degree is increased in the slip zone while the main deformation range of the surface is suppressed.

关 键 词：采矿工程 地下开采 地表滑移 地表变形趋势 

分 类 号：TD32[矿业工程—矿井建设]