【作者】 陈昌富； 朱剑锋； 周志军；

【Author】 CHEN Chang-fu ZHU Jian-feng ZHOU Zhi-jun (Geotechnical Engineering Institute of Hunan Univ,Changsha Hunan 410082,China)

【机构】 湖南大学土木工程学院；

【摘要】 研究了基于Hoek-Brown强度准则岩体力学参数取值方法,指出了Hoek-Brown强度准则和有关改进公式中存在的不足,利用正弦函数来表征岩体受扰动程度修正系数K_m,K_s与完整系数K_v之间的关系,建立了Hoek-Brown经验参数m,s的一种改进取值方法-IBDRMP法.该法既反映了岩体受扰动程度,又反映了K_m,K_s与K_v之间的非线性关系.以大厂91号矿体岩体力学参数工程处理为例,分别采用IBDRMP法和其他几种方法进行分析计算,结果表明:IBDRMP法在确定介于扰动和未扰动之间的岩体力学参数时更接近实际情况.更多还原

【Abstract】 The calculation method of mechanical parameters of rock mass is discussed based on Hoek-Brown strength criterion.The shortcomings of Hoek-Brown strength criterion and its modified expressions are also pointed out.Through utilizing sine function to embody the relations between the modified coefficients K_m,K, which can take the degree of rock mass into account and the integrality coefficient K_v,an improved acquired method of Hock-Brown empirical parameters m,s,i.e.,the IBDRMP method,is constituted in this paper. The proposed method can not only reflect the distributed degree of rock mass but also be got easily,and more important it can embody the nonlinear relation between K_m,K_s and K_v.The calculation is carried out through the IBDRMP method and other methods,respectively,where study on mechanical parameters of rock mass from process on mechanical parameters of rock from Dachang 91~# Mine mass.Based on comparative study,it is found that the IBDRMP method is more suitable to determine the mechanical parameters of rock mass between dis- turbed and undisturbed and results from this method is closer to measured ones.更多还原