Coupled GIMP and CPDI material point method in modelling blast-induced three-dimensional rock fracture  

作　　者：Duanying Wan Meng Wang Zheming Zhu Fei Wang Lei Zhou Ruifeng Liu Weiting Gao Yun Shu Hu Xiao 

机构地区：[1]MOE Key Laboratory of Deep Earth Science and Engineering,College of Architecture and Environment,Sichuan University,Chengdu 610065,China [2]Failure Mechanics and Engineering Disaster Prevention,Key Laboratory of Sichuan Province,Sichuan University,Chengdu 610065,China [3]State Key Laboratory of Hydraulics and Mountain River Engineering,College of Water Resources and Hydropower,Sichuan University,Chengdu 610065,China [4]College of Civil and Architecture Engineering,Panzhihua University,Panzhihua 617099,China

出　　处：《International Journal of Mining Science and Technology》2022年第5期1097-1114,共18页矿业科学技术学报（英文版）

基　　金：This research was funded by the Natural Science Foundation of Sichuan,China(No.2022NSFSC1915);the National Natural Science Foundation of China(No.U19A2098);State Key Laboratory of Precision Blasting and Hubei Key Laboratory of Blasting Engineering,Jianghan University(No.PBSKL2022B06);the Fundamental Research Funds for the Central Universities。

摘　　要：Three-dimensional rock fracture induced by blasting is a highly complex problem and has received considerable attention in geotechnical engineering.The material point method is firstly applied to treat this challenging task.Some inherent weaknesses can be overcome by coupling the generalized interpolation material point(GIMP)and the convected particle domain interpolation technique(CPDI).For the media in the borehole,unchanged GIMP-type particles are used to guarantee a homogenous blast pressure.CPDITetrahedron type particles are employed to avoid the fake numerical fracture near the borehole for the rock material.A blasting experiment using three-dimensional single-borehole rock was simulated to examine the applicability of the coupled model under realistic loading and boundary conditions.A good agreement was achieved between the simulation and experimental results.Moreover,the mechanism of three-dimensional rock fracture was analyzed.It was concluded that rock particle size and material parameters play an important role in rock damage.The reflected tensile waves cause severe damage in the lower part of the model.Rayleigh waves occur on the top face of the rock model to induce a hoop failure band.

关 键 词：Material point method(MPM) Convected particle domain interpolation (CPDI) Generalized interpolation material point (GIMP) Rock fracture BLAST 

分 类 号：TU45[建筑科学—岩土工程]