摘要
以致密砂岩三轴测试为基础,建立Hoek-Brown(H-B)参数反算模型,应用4种基于不同假设H-B准则方法对岩石抗剪参数进行估值并修正,与Mohr-Coulomb(M-C)准则结果对比。结果表明,修正后两种准则估值结果极为接近。将该方法应用于Shirahama砂岩,评价结果与试验结果较为一致,表明基于反算法建立的H-B参数与岩体抗剪参数间定量关系可信。岩体声学参数与抗剪参数间关系的进一步探索对预测岩体破坏及采矿安全具参考价值。
This paper is based on the triaxial test results of the tight sandstone,we created an inverse model to obtain the defining parameters in H-B criterion,using 4 other methods based on the H-B criterion to evaluate the values of sandstone’s cohesion and internal friction angle. A comparison was made with the results by conventional linear M-C criterion method,it shows that after giving a certain correction to the evaluation results,they would have a much more higher precision and application value. Finally,by applying these methods into Shirahama sandstone,the evaluation result is consistent with the real one. The results show that the method promoted in this paper is feasible. The further exploration of rock mass’ s acoustic parameters and its shear parameters has a great reference value to prediction of rock damage and the safety of mining.
出处
《地下空间与工程学报》
CSCD
北大核心
2016年第2期407-411,共5页
Chinese Journal of Underground Space and Engineering
基金
国家自然科学基金(41372139
41072098)
国家科技重大专项专题(2011ZX05018-001-002
2011ZX05009-002-205
2016ZX05046-003)
关键词
H-B准则
砂岩
抗剪强度
内聚力
内摩擦角
估值
H-B criterion
sandstone
shear strength
cohesion
internal friction angle
evaluation
