Effect of Rock Stress Evolution on Failure Under Transverse Plain Water Jet
Effect of Rock Stress Evolution on Failure Under Transverse Plain Water Jet
复制标题
横向普通水射流下岩石应力演化对破坏的影响
DOI：
10.1007/s10706-020-01269-7
复制
发表时间：
2020
影响因子：
1.7
通讯作者：
Cao Wenzheng
中科院分区：
文献类型：
--
作者：
Hu Mengmeng;Li Biao;Zhang Bo;Zhang Chao;Nie Lichao;Liu Zhengyu;Cao Wenzheng
研究了横向平面水射流冲击岩石的应力演化特征，包括应力演化在解释岩石（包括人造岩石）破碎规律中的应用。基于半无限平面理论，得到了横向射流作用下岩石应力演化的解析解，以及基于Mohr-Coulomb准则的岩石微元应力状态变量F的演化。在此基础上，分析了岩石微元的弹脆性破坏和弹脆性损伤。此外，还提出了基于弹脆性破坏假设的损伤变量D的表达式。分析表明，基于弹脆性破坏假设，岩石微元的破坏是由F-S演化曲线的峰值决定的。由演化曲线F和直线（F = F-0）所围成的面积Δ S（F）与损伤变量D呈正相关关系，可以定性地解释横向PWJ破岩的时间依赖性。此外，本文提出的基于损伤变量D的方法在定量分析岩石破坏的时间相关性方面显示了巨大的潜力。
The subject of this investigation is the stress evolution characteristics of rock impacted by transverse plain water jet (PWJ), including the application of stress evolution in the interpretation of the laws of breaking rocks (including artificial rock). Based on the semi-infinite plane theory, an analytical solution of the stress evolution of rock subjected to transverse jet loading is obtained, and the evolution of the stress state variableFof the rock microelement based on the Mohr-Coulomb criterion is also obtained. Then, elastic brittle failure and elastic-brittle damage of rock microelements are analyzed. Besides, an expression of the damage variableDbased on elastic-brittle failure assumption is proposed. The analysis shows that the peak values of theFevolution curve determines the failure of the rock microelement based on the elastic-brittle failure hypothesis. The areaS(F)surrounded by the evolution curveFand the line (F = F-0) is positively correlated with the damage variableD, which can be used to qualitatively explain the time dependence of breaking rock using a transverse PWJ. In addition, the method based on damage variableDpresented in this paper shows great potential in quantitative analysis of time dependence of rock failure.