应用数学和力学2025，Vol.46Issue(10)：1320-1328,9.DOI:10.21656/1000-0887.450229
基于物质点法的岩石单孔爆破数值模拟研究
Numerical Simulation of Single Hole Blasting of Rock Based on the Material Point Method
摘要
Abstract
The drilling and blasting method is the main rock-breaking means in mineral resource mining,and its theoretical analysis imposes great limits on the applicable conditions.Moreover,the blasting experiments have limitations such as high costs,and difficulty in observing the cracks formed after blasting.Numerical methods have become an important supplementary means to explore the comprehensive fracture mechanism of rock ex-plosion.A 2D material point model coupled with the generalized interpolation material point(GIMP)and the conjugate particle domain interpolation material point(CPDI),was proposed to analyze effects of the back-ground mesh and material point discretization sizes.The results show that,the discretization sizes of the back-ground grid and material points significantly influence the transfer of explosion energy,and the degree of dam-age to the rock is positively correlated with the total energy transferred from the explosive to the rock.In the simulation of the fracture failure under rock blasting load,the GIMP-type material points are suitable for simu-lating extreme compression deformation in explosive core areas.In contrast,the CPDI-type material points are more appropriate for simulating rock blasting damage situations.Under the action of detonation waves,the compressive stress on the borehole wall exceeds the rock compressive strength,leading to the rock crushing destruction,and a severely damaged area appearing around the borehole.The detonation wave continues to propagate and attenuate into a stress wave,and the hoop stress wave propagating along the radial direction will generate a larger tensile stress in the circumferential direction,leading to the formation of radial cracks.关键词
爆破/物质点法/岩石Key words
blasting/material point method/rock分类
力学引用本文复制引用
韩方建,库启贤,于海军,邱乙,邹明,王蒙..基于物质点法的岩石单孔爆破数值模拟研究[J].应用数学和力学,2025,46(10):1320-1328,9.基金项目
四川省自然科学基金(2022NSFSC1915) （2022NSFSC1915）
