论文部分内容阅读
对高阶段充填体进行了力学分析,推导了分层充填力学计算公式,用可靠性理论研究了高阶段充填体稳定性。考虑高阶段充填体可靠性分析的状态函数求导困难,提出了基于混沌优化的可靠性计算方法,为工程中复杂函数计算可靠性指标提供了一种新的方法。高阶段充填体力学研究表明:缩短采场长度和增大采场宽度有利于充填体稳定性和降低充填成本。为了评价高阶段充填体稳定性,分别在实验室配制充填料浆和采场取样试验了尾砂胶结充填体强度,分析了采场原位充填体强度与实验室试验强度的差异。研究认为:采用实验室力学参数进行充填设计,最小设计安全系数为1.6～1.8,最小可靠性指标为1.8～2.0比较合理。用本文方法对安庆铜矿3号高阶段采场充填体进行了可靠性分析,并评价了充填设计的可行性。
The mechanical analysis of high-stage filling body was carried out. The formula of layered filling mechanics was deduced, and the stability of high-stage filling body was studied by reliability theory. Considering the difficulties of derivation of the state function of the reliability analysis of high-level filling body, a reliability calculation method based on chaos optimization is proposed, which provides a new method for calculating the reliability index of complex functions in engineering. The research of high-stage filling body mechanics shows that shortening the stope length and increasing the stope width are beneficial to the stability of filling body and reducing the filling cost. In order to evaluate the stability of the high-stage filling body, the strength of the tailings cemented filling body was tested in the laboratory by preparing the filling slurry and stope sampling respectively. The difference between the strength of the in-situ filling body and the laboratory test strength was analyzed. The study shows that: the filling design with laboratory mechanical parameters, the minimum design safety factor of 1.6 ~ 1.8, the minimum reliability index of 1.8 to 2.0 is more reasonable. The reliability analysis of No.3 high-stage stope filling body in Anqing Copper Mine was carried out with this method and the feasibility of filling design was evaluated.