金源矿区房柱法开采围岩稳定性分析

发布时间：2018-03-27 11:51

本文选题：深部开采　切入点：岩爆倾向性　出处：《中国矿业》2016年S2期

【摘要】：为了对矿区深部开采岩体的稳定性及岩爆倾向性进行深入地分析研究,本文针对金源矿区深部开采而可能带来的稳定性问题进行了数值模拟分析,结果表明:1中段开采过程中,拉应力集中在采场顶柱和部分矿柱,需严密监测中部矿柱应力,必要时可对其施加预应力锚杆加固;2矿柱水平位移基本变化不大,底板有轻微的底臌现象;3对60m长度单矿块的开采模拟中,若需多个矿块同时开采时,可采用隔一采一的方式有效控制围岩变形,保证开采安全;4若对埋深不同的多中段同时开采,最大弹性应变能将达到1.16×105J/m3,会对周边矿柱及围岩的稳定性留下安全应隐患。
[Abstract]:In order to analyze deeply the stability and rockburst tendency of the deep mining rock mass in the mining area, this paper makes a numerical simulation analysis of the possible stability problems caused by the deep mining in Jinyuan mining area. The results show that in the process of mining in the middle section of the first section, The tensile stress is concentrated on the top pillar of the stope and part of the pillar. The stress of the central pillar needs to be closely monitored. If necessary, the horizontal displacement of the No. 2 pillar can be strengthened with prestressed anchor bars. In the mining simulation of 3 pairs of 60 m long single ore blocks with slight floor heave, the deformation of surrounding rock can be effectively controlled by the method of one-mining and one-by-one if multiple ore blocks are needed to be mined simultaneously. The maximum elastic strain energy will reach 1.16 脳 10 ~ 5J / m ~ (3), which will leave a hidden danger to the stability of the surrounding pillar and surrounding rock.
【作者单位】：北京科技大学土木与环境工程学院;北京科技大学金属矿山高效开采与安全教育部重点实验室;
【基金】：国家自然科学基金资助项目资助(编号:51574014) 国家重点基础研究发展计划(973)项目资助(编号:2015CB060200)
【分类号】：TD325.1;TD853.32

【相似文献】