煤矿安全2018，Vol.49Issue(1)：226-229,4.DOI:10.13347/j.cnki.mkaq.2018.01.060
基于ANSYS的耦合装药系数对煤层预裂爆破增透效应数值模拟
Numerical Simulation of Coupling Charge Coefficient on Permeability Increasing Effect of Deep Hole Pre-splitting Blasting Based on ANSYS
李汉坤 1朱飞昊2
作者信息
- 1. 安徽理工大学能源与安全学院,安徽淮南232001
- 2. 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
- 折叠
摘要
Abstract
In order to study the effect of deep hole pre-splitting blasting on coal seam under different coupling charge coefficients,four sets of blasting models with different coupling charge coefficients were established and simulated by ANSYS / LS-DYNA.The stress nephogram and stress time history in x direction are obtained;the results of the analysis are as follows:when K=l.5,the crack propagation length is longer than that K=1.0;the uncoupled charge structure makes the effective stress distribution more uniform;with the increase of the coupling charge coefficient,the effective stress range decreases,which is less than that in the case of complete coupling;appropriately increasing in coupling charge coefficients can improve the energy efficiency and achieve the better permeability increasing effect;continuously increasing the coupling charge factor,the cracks do not extend to the control hole.关键词
煤层/深孔预裂爆破/耦合装药系数/增透/数值模拟Key words
coal seam/deep-hole presplitting blasting/coupling charge coefficient/permeability increasing/numerical simulation分类
矿业与冶金引用本文复制引用
李汉坤,朱飞昊..基于ANSYS的耦合装药系数对煤层预裂爆破增透效应数值模拟[J].煤矿安全,2018,49(1):226-229,4.
