摘要
根据大同矿区的开采情况和综合地质条件,分析了引发冲击地压的机理,针对大同矿区的特殊性提出了开采设计原则;通过数值模拟研究了留设小煤柱防治冲击地压的可行性,研究了锚杆加锚网整体支护方式的防冲击地压支护方法。结果表明:整体锚固结构使得围岩的切向应力更加集中,缩小了应力集中的围岩部分,对围岩深部煤层具有较强的径向约束,可优化围岩的应力分布,提高围岩的抗冲击能力。因此,整体锚固结构与一般锚固结构相比,抵御冲击能力大大增强。
According to the mining of Datong mining situation and the comprehensive geological conditions, this paper analyzes the cause mechanism of percussive ground pressure, mining design principles for the particularity of Datong mining area;This small coal pillars is studied through numerical simulation the feasibility of the prevention and treatment of percussive ground pressure, and this paper studies the mode of bolt and anchor net overall impact ground pressure supporting method, the actual effect is good.Results show that the whole anchorage structure makes the tangential stress of surrounding rock concentrated, reduces the stress concentration of the surrounding rock, restricts the surrounding rock of deep coal seam with strong radial constraint, and optimizes the surrounding rock stress distribution, improves the shock resistance ability of surrounding rock.As a result, compared with general anchorage structure, the overall anchorage structure impact ability greatly has enhanced.
出处
《机械管理开发》
2016年第7期15-17,20,共4页
Mechanical Management and Development
关键词
冲击地压
护巷煤柱
支护
rock dust
preserving coal pilla
support
