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岩石抗拉强度是岩石力学与工程研究中的重要参数之一。除了常规的几种岩石抗拉强度测量试验,空心岩柱法测岩石抗拉强度试验作为岩石抗拉强度测量试验的补充,在国外已有了较全面的研究,而国内对该试验的研究还很少,值得对该类试验归纳整理,探究其岩石抗拉强度的测量效果。通过从力学模型、试验开展现状、试验特征及影响因素等方面对国内外空心岩柱液压致裂试验文献进行整理总结,并与常规试验的测量结果进行对比分析,得出影响试验的主要因素为注液加载速率、岩样的尺寸规格、孔内液压与围压差值等。该类试验岩样加工简便,试验自身干扰因素较少、结果波动性小,相比其他常规的岩石抗拉强度测试试验具有一定的优越性。
Rock tensile strength is one of the most important parameters in rock mechanics and engineering research. In addition to the conventional tests of several kinds of rock tensile strength tests, the rock-column test of rock by the hollow column method, as a supplement to the rock tensile strength measurement test, has been more comprehensively studied abroad. However, the domestic research on this test Few, it is worth summarizing these tests to explore the measurement of rock tensile strength. By summarizing the hydraulic fracturing test data of hollow rock pillar at home and abroad from the aspects of mechanical model, current situation of test, characteristics of test and influencing factors, and comparative analysis with conventional test results, the main factors affecting the test are Fluid injection rate, the size of the rock sample, the hole pressure difference between the confining pressure and so on. These test samples are easy to process, less intrusive in the test and less fluctuation in results, which has some advantages over other conventional tests of rock tensile strength.