Numerical simulation of strainbursts using a novel initiation method
Numerical simulation of strainbursts using a novel initiation method
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一种新型起爆方法的应变爆数值模拟
DOI：
10.1016/j.compgeo.2018.10.018
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发表时间：
2019-02
影响因子：
5.3
通讯作者：
F. Gao;P. Kaiser;D. Stead;E. Eberhardt;D. Elmo
中科院分区：
文献类型：
--
作者：
F. Gao;P. Kaiser;D. Stead;E. Eberhardt;D. Elmo
冲击地压的数值模拟仍然是一个挑战，因为动态破坏模拟固有的困难。提出了一种新的离散单元粘结块体方法，并对其进行了数值模拟。该方法模拟了岩石动态破裂诱发的地震事件的产生。地震事件产生的P波和S波具有预期的应变爆发所需的地震波特性，包括速度、Vs/Vp比和频率。通过这种方式，成功地捕捉到了动态断裂过程中的应变破裂过程。模拟表明，可能存在一个临界应力水平，超过这个临界应力水平，微小的扰动就可以引发应变爆发。
Numerical simulation of rockbursts remains a challenge due to the inherent difficulties in dynamic failure simulation. A novel distinct-element bonded block method is proposed and tested to simulate strainbursts. The method simulates the generation of a seismic event induced by dynamic rock cracking. The seismic event produces P- and S-waves with seismic wave properties including velocity, the ratio of Vs/Vp, and frequency that are expected for strainbursts. In this manner, the process of strainbursting by dynamic fracture processes is successfully captured. The simulations suggest that a critical stress level may exist beyond which a minor disturbance can induce strainbursts.