摘要
大量工程实践已证明岩体结构是控制岩体稳定性的重要影响因素。为此,以大红山铜矿为研究背景,在选定有代表性调查地段的基础上,引入详细观测线法对其岩体结构进行了详细调查与统计。分析结果表明:调查区域内巷道岩体节理裂隙比较密集和发育,主要发育有倾向N53E、走向N37W、倾角53°,倾向W26S、走向N36W、倾角68°;倾向E1S、走向N1E、倾角89°的三组优势结构面,其中优势结构面第二组和第三组构成不稳定块体,并且断层及软弱夹层比较发育,加剧了巷道的破碎程度,对巷道围岩的稳定性有控制作用。最后提出了在巷道施工中密切注意围岩稳定性变化,避免工程事故的发生的建议。
It has been proved by many engineering practice that the rock structure is an important factor on controlling the stability of rocks. Taking Dahongshan Copper Mine as study background and selecting the representative investigation area, detailed observation line method was adopted to investigate and count the rock structure detailedly. The results show that the joints and cracks of the rock in the tunnels of investigated area developed and concentrated considerably. There were three groups of predominant structure surface in which the second and the third one constituted unstable rock body and developed faults and soft interlayer, which increased the breakage of tunnels and had the controlling function to the stability of tunnel rock. It is recommended that the changes of rock stability should be watched out in tunnel construction so as to avoid engineering accident.
出处
《云南冶金》
2007年第4期9-12,19,共5页
Yunnan Metallurgy
关键词
岩体结构
详细观测线法
围岩稳定性
大红山铜矿
rock structure
detailed observation line method
stability of wall rack
Dahongshan Copper Mine
