摘要
为有效防治"震-冲"型冲击地压,根据矿震与冲击地压的关系建立煤岩"震-冲"动力系统模型。以此作为研究的基本模型,探讨"震-冲"型冲击地压的发生机制和判据。采用数值模拟方法研究强矿震在工作面附近产生的动力效应。提出"震-冲"型冲击地压的防治对策。结果表明,"震-冲"型冲击地压的发生机制是在矿震扰动下,煤岩应力瞬间进入塑性软化阶段,煤岩体积聚能量与破坏消耗能量的差能增大,在满足冲击破坏的刚度条件时,发生强烈的冲击地压事故。分别控制矿震震动源区、矿震震能传播路径和冲击源区,能大大减弱或消除发生"震-冲"型冲击地压的危险性。
For effective provention and mitigation of rock burst induced by shock bump, a model was built for the coal and rock ＂ shock bump-rock burst＂ dynamic system based on the relationship between rock burst and shock bump. The mechanism of rock burst induced by shock bump and its instability criteri- on were analyzed on the basis of the model. The dynamic effects caused by thigh energy shock bumps near the working face were certified by numerical simulation. Corresponding control measures of rock burst induced by shock bumps were provided. The results show that the rock burst mechanism induced by shock bumps is that disturbance created by shock bump makes coal and rock stress reach the plastic softening stage instantaneously, the difference bigger between the accumulation energy of coal and rock and the consumption energy due to destruction, and a strong rock burst occurrs when the rigidity condition is satisfied. and that the danger of rock burst induced by shock bumps can be avoided or reduced greatly by controlling separately shock bump sources, shock bump energy propagation path and rock burst sources.
作者
吕鹏飞
陈学华
LYU Pengfei CHEN Xuehua(College of Mining, Liaoning Technical University, Fuxin Liaoning 123000, China)
出处
《中国安全科学学报》
CAS
CSCD
北大核心
2017年第4期145-150,共6页
China Safety Science Journal
基金
国家自然科学基金资助(51304110)
关键词
矿震
冲击地压
“震-冲”动力系统
传播与耗散
失稳判据
分源防治
shock bump
rock burst
＂shock bump-rock burst＂ dynamic system
transmitting and dissipating
instability criterion
prevention and treatment from different sources
