爆破荷载作用下煤岩本构模型参数特性研究

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振动与冲击 ›› 2025, Vol. 44 ›› Issue (5) : 263-277.

冲击与爆炸

爆破荷载作用下煤岩本构模型参数特性研究

张鑫1, 2, 刘泽功*1, 2, 常帅2, 陈响升2, 薛勇林2, 朱家亮2, 宋鑫2

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Parametric characteristics of coal rock constitutive model under blasting load

ZHANG Xin1,2, LIU Zegong*1,2, CHANG Shuai2, CHEN Xiangsheng2, XUE Yonglin2 ZHU Jialiang2, SONG Xin2

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摘要

为探究RHT(Riedel-Hiermaier-Thoma)本构模型和HJC(Holomquist-Johnson-Cook)本构模型在深部煤岩体爆破数值模拟中的适用性，首先基于淮北矿区深部原煤对RHT和HJC两种本构模型参数进行了标定；然后通过单孔爆破室内试验和数值模拟对所标定参数进行了有效性验证，并添加最大拉伸应力和最大剪切应力的复合失效准则对HJC模型进行改进；最后基于两种本构模型对不同地应力状态下单孔爆破进行数值模拟，探讨两种本构模型在模拟损伤区范围和破裂形态方面的适用性。单孔爆破数值模拟结果表明，无地应力加载状态下RHT本构模型和改进的HJC本构模型都能够较好描述压碎区的形成和裂纹区裂纹演化；不同地应力加载状态下RHT和HJC两种本构模型数值模拟结果均能体现出地应力对裂纹扩展具有制约作用。当围压为0 MPa，理论裂隙区半径为RHT模型的1.11倍，为HJC模型的1.20倍，两者差异较小。当围压增加到30 MPa，理论值裂隙区半径为RHT模型的1.31倍，为HJC模型的4.13倍，两者相差较大，基于RHT模型的数值模拟结果与理论值更接近。根据研究结果，RHT模型和改进的HJC本构模型均适用于无地应力状态下爆破问题的数值模拟，对于高地应力状态下爆破RHT本构模型应成为首选。

Abstract

In order to investigate the performance of Riedel-Hiermaier-Thoma（RHT） and Holomquist-Johnson-Cook（HJC） constitutive models in the numerical simulation of blasting in deep coal and rock bodies, the parameters of RHT and HJC constitutive models were calibrated based on the deep coal in Huaibei mining area; then the validity of the calibrated parameters was verified through the indoor tests and numerical simulations of single-hole blasting, and the composite failure criterion of maximal tensile stress and maximal shear stress was added to improve the HJC model. Finally, the numerical simulation of single-hole blasting under different ground stresses is carried out based on the two constitutive models to explore the applicability of the two constitutive models in simulating the range of damage zones and rupture patterns. The numerical simulation results of single-hole blasting show that both the RHT model and the improved HJC model are able to describe the formation of the crushed zone and crack evolution under no ground stress loading condition; the numerical simulation results of the RHT and HJC models under different ground stress loading conditions show that the ground stress has a restraining effect on the crack expansion, and the quantitative indexes of the expansion range of the crack zone show that the RHT model is closer to the theoretical value than the HJC model. The RHT model is closer to the theoretical calculation value than the HJC model. According to the results of the study, the RHT model and the improved HJC constitutive model are both suitable for the numerical simulation of the blasting problem in the absence of ground stress, and the RHT constitutive model should be the first choice for the blasting in the high ground stress condition.

导出引用

张鑫1, 2, 刘泽功1, 2, 常帅2, 陈响升2, 薛勇林2, 朱家亮2, 宋鑫2. 爆破荷载作用下煤岩本构模型参数特性研究[J]. 振动与冲击, 2025, 44(5): 263-277

ZHANG Xin1, 2, LIU Zegong1, 2, CHANG Shuai2, CHEN Xiangsheng2, XUE Yonglin2 ZHU Jialiang2, SONG Xin2. Parametric characteristics of coal rock constitutive model under blasting load[J]. Journal of Vibration and Shock, 2025, 44(5): 263-277

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