摘要
为明确多因素作用下岩体双孔爆破损伤规律,借助RHT本构模型,构建岩体爆破裂纹扩展演化模型,采用ANSYS/LS-DYNA软件探究地应力A、抗拉强度B、不耦合系数C对岩体爆破特征的影响,并运用Design-Expert 12.0软件设计Box Behnken实验,构建岩体爆破损伤的二次回归响应曲面模型,探究三因素交互作用影响规律。研究结果表明:岩体有效损伤面积与地应力、抗拉强度、不耦合系数均呈负相关趋势;影响因素中地应力、抗拉强度、不耦合系数均为显著项,其中单因素影响程度为A>B>C;交互项影响依此为BC>AC>AB,且BC和AC交互作用极显著,AB交互作用不显著;基于响应曲面法,构建三因素-三水平下的二次响应回归模型,模型预测值与实验结果的偏差低于3.16%。研究结果对提高深部爆破效率具有重要意义。
To clarify the law of double-hole blasting damage in rock mass under the action of multiple factors,a model of rock mass blasting crack extension evolution was constructed with the aid of RHT constitutive model.The ANSYS/LS-DYNA software was used to explore the influence of ground stress A,tensile strength B and decoupling coefficient C on the blasting characteristics of rock mass.The Box Behnken test was designed by using Design-Expert 12.0 software to construct a quadratic regression response surface model for the blasting damage of rock mass,thus explore the influence of the interaction of three factors.The results show that the effective damage area of rock mass is negatively correlated with the ground stress,tensile strength and uncoupling coefficient.Among the influencing factors,the ground stress,tensile strength and decoupling coefficient are all significant terms,among which,the influence degree of single factor is A>B>C.The interaction term effect is BC>AC>AB,and the interaction of BC and AC is highly significant,while the interaction of AB is not significant.Based on the response surface method,a quadratic response regression model with three factors and three levels is constructed,and the deviation between the predicted values of the model and the test results is less than 3.16%.The research results are of great significance for improving the efficiency of deep blasting.
作者
解北京
栾铮
李晓旭
石嘉煜
XIE Beijing;LUAN Zheng;LI Xiaoxu;SHI Jiayu(School of Emergency Management and Safety Engineering,China University of Mining and Technology-Beijing,Beijing 100083,China)
出处
《中国安全生产科学技术》
CAS
CSCD
北大核心
2023年第9期20-26,共7页
Journal of Safety Science and Technology
基金
国家重点研发计划项目(2022YFC2904100)
中央高校基本科研业务费专项资金资助项目(2023ZKPYAQ04)
安徽省爆破器材与技术工程实验室项目(AHBP2022A-03)。
关键词
双孔爆破
损伤演化
影响因素
响应曲面
交互作用
double-hole blasting
damage evolution
influencing factor
response surface
interaction
