黄金科学技术 ›› 2018, Vol. 26 ›› Issue (5): 605-614.doi: 10.11872/j.issn.1005-2518.2018.05.605
李光1,2,3,马凤山1,2,刘港1,2,3,郭捷1,2,郭慧高4,寇永渊4
Guang LI1,2,3,Fengshan MA1,2,Gang LIU1,2,3,Jie GUO1,2,Huigao GUO4,Yongyuan KOU4
摘要:
巷道支护问题一直是矿业工程中的难题,特别是在深部软岩巷道中,能否提供持久、有效的支护直接影响着矿山的安全生产和可持续发展。“双层网锚喷+U型钢拱架”联合支护是目前金川矿区在深部巷道支护中较常用的支护方案,为了解该方案的支护效果,在二矿区814 m分斜坡道上设立试验段,采用现场监测与数值模拟计算相结合的方法,对该试验段巷道的支护效果进行评价,并针对支护的薄弱部分提出改进措施。研究结果表明:(1)在当前支护条件下,巷道顶板和两帮围岩得到了较好的控制,但底鼓问题严重,最大位移可达110 cm;(2)针对当前支护方案的薄弱环节,提出增加锚杆长度、提高锚杆强度和增加底板支护等补强措施;(3)设计了一组参数优化方案,并对其支护效果进行了数值模拟分析,认为该优化支护方案能够有效地控制巷道围岩变形,并弥补原支护方案的缺陷。
中图分类号:
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