Analysis for landslide caused by underground mining

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. © 2016, Science Press. All right reserved.