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深部岩体处于高地应力、高温、高孔隙压力的环境。这使深部岩体的组织结构、基本行为特征和工程响应均发生根本性变化,也导致深部开采中灾变事故的出现。为了控制深部采场回采过程中的某金属矿深部采场的围岩稳定性,也为改善深部开采采矿技术经济指标,结合实际利用有限元程序,对某矿爆破回采过程进行数值模拟,分析采场顶板和间柱的应力场、位移场和塑性区,爆破作用对顶板和间柱造成的损伤作用。研究表明,采场经过爆破回采作业后,水平及竖直向应力场的区域及位移场的区域并没有发生明显改变,只是在数值上有所增加。但塑性区发生明显变化。分析结果对采场的稳定性研究及地表沉降研究提供了参考。
Deep rock in high ground stress, high temperature, high pore pressure environment. This causes fundamental changes in the organizational structure, basic behavior and engineering response of deep rock mass, and also leads to the occurrence of catastrophic accidents in deep mining. In order to control the stability of surrounding rock in the deep stope of a metal mine during the deep stope mining process and also to improve the economic and technical indexes of mining technology in deep mining, the finite element program is used to simulate the blasting process in a mine. The stress field, the displacement field and the plastic zone of the roof and between the columns, the blasting effect on the roof and between the column damage. The research shows that the area of horizontal and vertical stress fields and the area of displacement field have not changed obviously after blasting and mining operation, only the numerical increase. However, significant changes have taken place in the plastic zone. The results of the analysis provide a reference for the study of stope stability and surface subsidence.