爆破荷载作用下煤岩本构模型参数特性研究  

Parametric characteristics of coal rock constitutive model under blasting load

作　　者：张鑫 刘泽功[1,2] 常帅[2] 陈响升 薛勇林 朱家亮 宋鑫 ZHANG Xin;LIU Zegong;CHANG Shuai;CHEN Xiangsheng;XUE Yonglin;ZHU Jialiang;SONG Xin(Key Laboratory of Safe and Effective Coal Mining Ministry of Education,Ministry of Education,Anhui University of Science and Technology,Huainan 232001,China;School of Safety Science and Engineering,Anhui University of Science and Technology,Huainan 232001,China)

机构地区：[1]安徽理工大学煤矿安全高效开采省部共建教育部重点实验室,安徽淮南232001 [2]安徽理工大学安全科学与工程学院,安徽淮南232001

出　　处：《振动与冲击》2025年第5期263-277,共15页Journal of Vibration and Shock

基　　金：云南省重点研发计划项目(202303AA080014);国家自然科学基金(52074013);安徽理工大学煤矿安全高效开采省部共建教育部重点实验室开放基金(JYBSYS202409);安徽理工大学2023年研究生创新基金(2023CX1004)。

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本构模型进行改进;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时,理论裂隙区半径为RHT本构模型的1.11倍,为HJC本构模型的1.20倍,两者差异较小;当围压增加到30 MPa时,理论值裂隙区半径为RHT本构模型的1.31倍,为HJC本构模型的4.13倍,两者相差较大,基于RHT本构模型的数值模拟结果与理论值更接近。根据研究结果,RHT本构模型和改进的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。Here,to investigate the applicability of Riedel-Hiermaier-Thoma(RHT)constitutive model and Holomquist-Johnson-Cook(HJC)constitutive model in numerical simulation of deep coal rock masses blasting,parameters of RHT and HJC constitutive models were calibrated based on deep raw coal in Huaibei mining area,Anhui Province of China.Then,the effectiveness of the calibrated parameters was verified by using single-hole blasting indoor tests and numerical simulation,and HJC model was improved by adding a composite failure criterion of maximum tensile stress and maximum shear stress.Finally,based on the two constitutive models,numerical simulations were conducted for single-hole blasting under different crustal stress conditions to explore the applicability of the two constitutive models in simulating damage zone range and fracture morphology.Numerical simulation results of single-hole blasting showed that both RHT constitutive model and the improved HJC constitutive model can better describe formation of crushed zone and crack evolution in crack zone under no crustal stress loading condition;numerical simulation results of RHT and HJC constitutive models under different crustal stress loading states can reflect the constraint effect of crustal stress on crack propagation;when confining pressure is 0,theoretical crack zone radius is 1.11 times that of RHT model and 1.20 times that of HJC model,the difference between the two is smaller;when confining pressure increases to 30 MPa,theoretical crack zone radius is 1.31 times that of RHT model and 4.13 times that of HJC model,the difference between the two is larger,numerical simulation results based on RHT model are closer to theoretical values;according to the study results,both RHT model and the improved HJC constitutive model are applicable for numerical simulation of blasting problems under no crustal stress condition,and RHT constitutive model should be the preferred choice for blasting under high crustal stress condition.

关 键 词：煤岩体 爆破 本构模型 裂纹扩展 裂隙区范围 

分 类 号：X936[环境科学与工程—安全科学]