煤矿安全2025，Vol.56Issue(6)：63-70,8.DOI:10.13347/j.cnki.mkaq.20231236
动静载荷诱发应力主导型煤与瓦斯突出模拟与防控
Simulation and control of coal and gas outburst induced by dynamic and static loads
摘要
Abstract
In order to study the effects of multi factor coupling on micro-cracks,stress changes,outburst velocity,and outburst dis-tance during coal and gas outbursts,including geostress,gas pressure,and dynamic disturbances,based on the particle method,we establish a numerical model to simulate the process of coal and gas outburst.Firstly,different vertical and horizontal stress condi-tions are applied to the model to simulate the characteristics of coal and gas outburst speed,outburst distance,crack propagation when the initial gas pressure is 1.0 MPa.Then,four gas pressure gradients of 0.25,0.5,1.0,2.0 MPa were set under the condition of vertical and horizontal stress of 12 MPa and 9.6 MPa,and the influence of gas pressure on coal and gas outburst process was studied.Finally,dynamic loads are applied to three sets of boundary conditions that did not cause coal and gas outbursts in the previous two simulation environments to explore the impact of dynamic disturbances on coal and gas outbursts.Research has shown that stress mainly provides the driving force for coal and gas outbursts,accelerating the destruction of the coal body.The higher the stress,the faster the coal particles outburst,and the farther the outburst distance.Stress plays a dominant role in the development and occur-rence of stress dominated outbursts.Gas pressure can to some extent reduce the difficulty of coal and gas outbursts,but when the gas pressure is too low,it will limit the occurrence of disasters.The main impact of dynamic disturbance on coal and gas outbursts is that it leads to the expansion and development of coal rock fractures,promoting gas desorption.Moreover,when the stress level is low,dynamic disturbances can also become a triggering factor for outburst occurrences.关键词
煤与瓦斯突出/动静载荷/应力变化/瓦斯解吸/注爆一体化/突出防治Key words
coal and gas outburst/dynamic and static load/stress change/gas desorption/injection and explosion integration/out-burst prevention分类
矿业与冶金引用本文复制引用
李普,房新亮,郭志企,郭怀广,温蓬..动静载荷诱发应力主导型煤与瓦斯突出模拟与防控[J].煤矿安全,2025,56(6):63-70,8.基金项目
河南省高等学校重点科研资助项目(22A440003) （22A440003）
