闭坑矿山多层空区消纳盾构渣土稳定性分析

• 作 者: 何环莎 吴亚斌 戴志平
• 机 构: 长沙矿山研究院有限责任公司,金属矿山安全技术国家重点实验室,苏州市吴江区住房与城乡建设局,
• 出 处: 矿业研究与开发
• 发表日期: 2017年10期
• 关键词: 稳定性分析 地下采空区 矿山 闭坑 渣土消纳场 顶板围岩 移动范围 采空区治理 盾构 石材

为确保由石材厂改造建成的渣土消纳场的安全运行,利用有限元分析软件FLAC~(3D)对原石材厂开采过程进行数值模拟,综合分析地下采空区对地表房屋及消纳作业场所的影响。结果表明:采空区顶板位移沉降量较小,大部分顶板围岩拉应力为0.1~0.13MPa,大面积受拉破坏可能性小,但可能出现局部冒落现象;采空区上方岩体移动范围影响至地表,最大位移发生在6号采空区的顶板位置,处于目前消纳场作业区域,采空区上方地表位移3~4 mm。渣土浆充填入采空区后将改善采空区的稳定性,对地表房屋及渣土车作业场所影响较小。

In order to ensure the safe operation of the mucky ground built by the stone factory, finite element analysis software FLAC 3D was used to simulate the mining process of the original stone factory. The comprehensive analysis of the effects of the underground mined area on the surface houses and consumption Place of influence. The results show that the displacement of roof displacement in goaf is small, the tensile stress in most roof rock is 0.1 ~ 0.13MPa, the possibility of large area tensile failure is small, but local caving may occur; The range affects the ground surface, and the maximum displacement occurs at the roof position of No.6 gob, which is at the current operation area of ​​the disposal area. The surface displacement above the goaf is 3 ~ 4 mm. Slag filling into the goaf will improve the stability of the goaf and has less impact on the work place of the surface houses and the muck.