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在冶金矿山、水工建设、铁路隧道,以及其它的地下工程中,分析研究地下工程围岩的破坏机理是极为重要的,因为安全性就依靠控制围岩破坏的能力。当前,国际上对坚硬岩石的脆性破坏机理研究的较多,而对于软弱岩石在工程实践中往往发生脆性破坏的情况研究的很少。本文通过粉砂岩的现场试验,分析了单轴和三轴压缩下的脆性破坏机理,并对其在地下工程的设计应用上作一简要叙述。
In metallurgical mines, hydraulic construction, railway tunnels, and other underground engineering, it is important to analyze the failure mechanisms of the surrounding rock in underground engineering because safety depends on the ability to control the failure of surrounding rock. At present, there are many researches on the brittle failure mechanism of hard rock in the world, and few studies on the brittle failure of soft rock often occur in engineering practice. In this paper, through the field test of siltstone, the brittle failure mechanism under uniaxial and triaxial compression is analyzed, and a brief description of its design and application in underground engineering is given.