论文部分内容阅读
采场破坏失稳是一个不连续的非线性过程。为分析矿山采场的稳定性,在建立采场顶板-矿柱的简化力学模型的基础上,结合安徽某充填采矿法矿山的采场结构参数,运用尖点突变理论分析采场突变过程中的能量释放机理,构建采场破坏失稳的尖点突变模型,推导得出系统失稳的充要力学条件。结果表明:采场中矿柱的应变软化特性和刚度比是导致系统失稳的主要因素,而矿柱的突跳量仅与系统的内在特性有关。结合矿山实例,从必要条件和充分条件2个方面对采场进行稳定性分析,表明尖点突变理论合理可行。验证了采区设置盘区矿柱等安全措施的必要性。
Stope failure instability is a discontinuous nonlinear process. In order to analyze the stope stability of stope, based on the simplified mechanics model of stope roof - pillar, combined with the stope structure parameters of a mining mining method in Anhui Province, the cusp catastrophe theory is used to analyze the process of stope change Energy release mechanism to construct a cusp catastrophe model of stope failure instability, deduced the necessary and sufficient mechanical conditions of system instability. The results show that the strain softening and stiffness ratio of the mine pillar in the stope are the main factors leading to system instability, while the amount of sudden jump in the mine pillar is only related to the inherent characteristics of the system. According to the mine example, the stability analysis of the stope is carried out from the necessary and sufficient conditions, which shows that the cusp catastrophe theory is reasonable and feasible. It verifies the necessity of safety measures such as setting pillars in the mining area.