黄金科学技术 ›› 2020, Vol. 28 ›› Issue (6): 885-893.doi: 10.11872/j.issn.1005-2518.2020.06.112
Chenglong WANG1(),Chenglu HOU2,Shanghuan YANG2(),Xingdong ZHAO3
摘要:
针对千米深井高应力破碎围岩控制难题,以三山岛金矿大埋深巷道为工程背景,通过现场工程地质调查,获取围岩结构面信息,并结合室内岩石力学试验,进行岩体质量分级和岩体参数估算;基于RMR和Q支护图表,确定采用“喷射混凝土+锚杆+钢筋网+双筋条”方法对研究区域进行支护;应用RS2和Unwedge软件分析巷道支护前后围岩塑性区、位移和潜在楔形体安全系数的变化特征。结果表明:巷道支护后,围岩塑性区和位移显著减小,潜在楔形体安全系数明显增大,提出的支护方案能够确保巷道稳定。由此可知,经验法与数值模拟法相结合的综合研究方法可以准确地分析巷道稳定性情况,并确定更可靠的支护方案,为矿山安全生产提供可靠保障。
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