摘要
为提高深部岩体力学参数估算的准确性。对从某矿现场取得的岩样进行岩石力学性质试验,获得包括岩石的抗压强度、弹性模量、黏聚力和内摩擦角等岩石力学参数。然后,对同一位置、不同方向的多个钻孔进行钻孔成像勘探,延伸其中的结构面,联通获得其三维空间分布特征,确定岩体结构等级和结构面表面特征等级。进而,基于地质强度指标(GSI)系统和Hoek-Brown准则,建立深部岩体力学参数量化取值的新方法。研究表明,用量化GSI方法估算得出的岩体力学参数小于室内岩石力学性质试验得出的结果。
The paper was aimed at developing a better mefhod for estimating more accurately deep rock mass mechanics parameters using indoor rock mechanics test and borehole imaging field exploration technology, combined with GSI and Hoek-Brown criteria.The new method for quantitative values of deep rock mass mechanics parameters.Based on mine field are rock mechanics laboratory test sample.Tests were made on a certain rock sample taken from a mine in China. Rock mechanics parameters, were obtained for the sample, such as rock sigma compressive strength, elastic modulus, cohesion and internal friction angle. Borehole imaging exploration operations were carried out for the borehole from which the sample was taken.Distribution of structural planes in 3D space was studied. A GSI and Hoek-brown criteria based method was worked out for estimating the parameters.It was demonstrated that the values estimated by GSI method for the parameters are lower than those obtained by indoor testing.
出处
《中国安全科学学报》
CAS
CSCD
北大核心
2016年第4期131-136,共6页
China Safety Science Journal
基金
国家自然科学基金应急项目资助(51474258)
国家科技重大专项课题(2011ZX05040-001-005)
