某矿复杂采空区群稳定性数值模拟研究

某矿采空区具有规模大、数量多、空间关系复杂等特点,急需开展复杂采空区群稳定性课题的研究。在对采空区群及其开采环境现场调研的基础上,进行了现场点荷载试验与室内单轴抗拉、抗压强度实验,获得岩体力学参数。采用三维有限元方法对该矿进行数值模拟,模拟结果表明:该矿采空区稳定性偏低,部分空区顶板出现拉应力集中,有可能出现顶板冒落。根据分析结果,提出了相应安全对策,为矿山的安全生产起到指导作用。

Numerical Simulation of Complicated Goaf Group Stability During Its Exploitation in A Limestone Mine

A limestone mine have some characteristics such as large scale, quantity and spatial relationships complex, so we need carry out a research about stability of complex goaf group. On the basis of goaf group of environment and field investigation, we performed the field point load test and indoor uniaxial tensile and compressive strength experi- ment, and obtained rock mechanics parameters. By adopting three - dimensional finite element method, analysis has been done in a limestone mine. The results are as follows ： the stability of the limestone mine is low, and part of roof mined -out area appear concentrated tensile stress, which maybe cause the roof to fall. According to the results, we put forward the corresponding countermeasures for mine safety, which can be lamilloy for mine safety production.