Improving the Hoek-Brown criterion based on the disturbance factor and geological strength index quantification
Improving the Hoek-Brown criterion based on the disturbance factor and geological strength index quantification
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DOI：
10.1016/j.ijrmms.2018.06.004
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发表时间：
2018-08-01
影响因子：
7.2
通讯作者：
Bai, Huilin
中科院分区：
文献类型：
--
作者：
Feng, Wenkai;Dong, Shan;Bai, Huilin
提出了一种GSI系统的补充量化方法，重点是改善GSI和岩体扰动因子（D）。该方法采用表面条件等级（SCR）、结构面条件系数（J（c））、岩体基本质量指数（BQ）和岩体结构等级（SR）。提出了一种基于BQ的扰动因子（D）的改进公式。使用这种方法，GSI值是给定区间内的一组可能的数字，而不是一个恒定值。GSI与岩体D之间的关系不仅反映了波速对岩体的扰动程度，而且还反映了强度对岩体扰动程度的差异，从而提高了D值的准确性。此外，由于SCR、J（c）、BQ和SR之间的标准差值，GSI区域可能因量化因子差异较大而相当宽。因此，测量间隔值的方法可以最大限度地减少误差，推荐使用中间间隔值。
A supplementary quantified approach for the GSI system is proposed by focusing on improving the GSI and the rock mass disturbance factor (D). The surface condition rating (SCR), the structure plane condition factor (J(c)), the rock mass basic quality index (BQ), and the rock mass structure rating (SR) are used in the proposed method. An improved formula for the disturbance factor (D) using the BQ is established. With this method, the GSI value is a set of possible numbers within given intervals rather than a constant value. The relationship between the GSI and rock mass D reflects not only the disturbance degree of the rock mass from the wave velocity but also the difference in the disturbance degree from the strength, which increases the accuracy of the D value. In addition, because of the value of the standard differences among the SCR, J(c), BQ and SR, the GSI region may be considerably wider due to quantification factors with larger differences. Thus, the method of measuring the interval value can maximize error reductions, and intermediate interval values are recommended for use.