某铜矿逆断层对围岩稳定性影响数值分析

来源期刊：有色金属科学与工程2012年第6期

论文作者：饶运章 徐灵彬

文章页码：57 - 62

关键词：逆断层；围岩稳定性；数值模拟

Key words：reverse fault; stability of surrounding rock; numerical simulation

摘    要：Reverse fault which includes various weak structural planes such as joint, fissure, cleavage is a geological structure often encountered in mining. With the lithology change, it makes unpredictable effects on the mining. In this paper, it builds a mining model which the orebody is in the middle of the two reverse faults by FLAC3D software, researches the influence of thrust faults on the stability of surrounding rock, and finds out the rule that reverse fault changes the distribution pattern of the surrounding rock stress gradually increase with depth, hence increases the maximum shear stress and maximum principal stress in part of the region, especially the stress above orebody, which leads to the shear failure area in upper plate fault, which significantly increases the risk of stope roof falling and collapsing. Close attention should be paid and active and effective support measures should be taken to avoid safety accidents.

Abstract: Reverse fault which includes various weak structural planes such as joint, fissure, cleavage is a geological structure often encountered in mining. With the lithology change, it makes unpredictable effects on the mining. In this paper, it builds a mining model which the orebody is in the middle of the two reverse faults by FLAC3D software, researches the influence of thrust faults on the stability of surrounding rock, and finds out the rule that reverse fault changes the distribution pattern of the surrounding rock stress gradually increase with depth, hence increases the maximum shear stress and maximum principal stress in part of the region, especially the stress above orebody, which leads to the shear failure area in upper plate fault, which significantly increases the risk of stope roof falling and collapsing. Close attention should be paid and active and effective support measures should be taken to avoid safety accidents.