煤岩“震-冲”动力系统冲击失稳致灾机制研究

doi:10.16265/j.cnki.issn1003-3033.2017.04.026

中国安全科学学报 ›› 2017, Vol. 27 ›› Issue (4): 145-150.doi: 10.16265/j.cnki.issn1003-3033.2017.04.026

煤岩“震-冲”动力系统冲击失稳致灾机制研究

吕鹏飞, 陈学华教授

辽宁工程技术大学矿业学院,辽宁阜新 123000

收稿日期:2017-01-04 修回日期:2017-03-12 发布日期:2020-11-22
作者简介:吕鹏飞 (1989—),男,辽宁阜新人,博士研究生,主要研究方向为矿井动力灾害防治、矿山压力及控制。E-mail:lntu_lpf@163.com。
基金资助:
国家自然科学基金资助(51304110)。

Research on instability mechanism of coal and rock "shock bump-rock burst" dynamic system

LYU Pengfei, CHEN Xuehua

College of Mining, Liaoning Technical University, Fuxin Liaoning 123000, China

Received:2017-01-04 Revised:2017-03-12 Published:2020-11-22

摘要/Abstract

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。

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

Abstract: 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 criterion 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 greatlyby controlling separately shock bump sources, shock bump energy propagation path and rock burst sources.

Key words: shock bump, rock burst, "shock bump-rock burst", dynamic system, transmitting and dissipating, instability criterion, prevention and treatment from different sources

中图分类号:

X915.5
TD324

吕鹏飞, 陈学华. 煤岩“震-冲”动力系统冲击失稳致灾机制研究[J]. 中国安全科学学报, 2017, 27(4): 145-150.

LYU Pengfei, CHEN Xuehua. Research on instability mechanism of coal and rock "shock bump-rock burst" dynamic system[J]. China Safety Science Journal, 2017, 27(4): 145-150.

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煤岩“震-冲”动力系统冲击失稳致灾机制研究

Research on instability mechanism of coal and rock "shock bump-rock burst" dynamic system

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