岩石RHT本构的爆破碎裂判定方法优化及验证  

Optimization and Verification of Blasting Fragmentation Judgment Method for RHT Constitutive Model of Rock

作　　者：黄永辉[1] 孙博 张智宇[2,3] 钱正乾 王军 李洪超 HUANG Yonghui;SUN Bo;ZHANG Zhiyu;QIAN Zhengqian;WANG Jun;LI Hongchao(Faculty of Electric Power Engineering,Kunming University of Science and Technology,Kunming,Yunnan 650500,China;Faculty of Land Resources Engineering,Kunming University of Science and Technology,Kunming,Yunnan 650093,China;Yunnan Key Laboratory of Sino-German Blue Mining and Utilization of Special Underground Space Kunming,Kunming University of Science and Technology,Kunming,Yunnan 650093,China;Yuxi Dahongshan Mining Co.,Ltd.,Yuxi,Yunnan 650302,China;Faculty of Urbanism,Kunming University of Science and Technology,Kunming,Yunnan 650051,China)

机构地区：[1]昆明理工大学电力工程学院,云南昆明650500 [2]昆明理工大学国土资源工程学院,云南昆明650093 [3]昆明理工大学云南省中-德蓝色矿山与特殊地下空间开发利用重点实验室,云南昆明650093 [4]玉溪大红山矿业有限公司,云南玉溪650302 [5]昆明理工大学城市学院,云南昆明650051

出　　处：《北京理工大学学报》2023年第6期565-574,共10页Transactions of Beijing Institute of Technology

基　　金：国家自然科学基金资助项目(52164009,52064025,52164010);云南省重大科技专项计划项目(202102AG050024)。

摘　　要：为补充RHT本构在岩石爆破中损伤分区研究方面的不足,基于岩石损伤准则与RHT本构方程建立了碎裂判定分区的计算方法,开展数值仿真与现场试验结果的对比分析,在此基础上对损伤半径计算公式进行了进一步划分与优化.研究结果表明:物质点法能很好地模拟出以变钠质熔岩为主要岩性下根据损伤临界阈值Dcr与碎裂区临界阈值Dcf所划分的碎裂区域,数值模拟结果与现场模拟拟合度高,RHT本构的碎裂判定方法具有一定的可行性;爆破漏斗各项数据随着埋深的增加呈先增加后减小的变化趋势,在埋深590mm时达到最大;不同埋深条件下,变钠质熔岩破碎区半径在近自由面位置最大,之后随着深度增加呈现下降趋势.研究成果能够在爆破数值模拟中损伤分区计算方面提供一定方法,为相关爆破工程设计提供指导.In order to overcome the deficiencies of RHT constitutive research on damage zoning in rock blasting,a calculation method of fracture determination zoning was established based on rock damage criterion and RHT constitutive equation.The feasibility of this method was verified by numerical simulation and field test.On this basis,the calculation formula of damage radius was further divided and optimized.The results show that the material point method can well simulate the fracture zone divided by the damage critical threshold Dcr and the critical threshold Dcf of the fracture zone under the main lithology of sodium metamorphosed lava.The numerical simulation results are highly consistent with the results of field simulation,proving the fracture determination range feasibility of RHT constitutive.With the increase of the buried depth ratio,the radius of each partition increases first and then decreases.The radius of each partition reaches the maximum when the buried depth ratio is 0.89.Under the conditions of different burial depth ratios,the radius of the broken zone of sodium metamorphosed lava is the largest near the free surface,and it showed a downward trend with increasing depth.The research results can provide a certain method for damage partition calculation in blasting numerical simulation,and provide guidance for blasting engineering design.

关 键 词：物质点法 RHT本构 损伤分区 数值模拟 爆破漏斗 

分 类 号：O389[理学—流体力学] TD862[理学—力学]