煤矿安全2019，Vol.50Issue(11)：158-163,6.DOI:10.13347/j.cnki.mkaq.2019.11.038
基于能量源-能量耗散理论的突出煤层最优掘进速度判定
Decision Method of Optimum Driving Speed in Outburst Coal Seam Based on Energy Source and Energy Dissipation Theory
摘要
Abstract
Taking a working face of Nanshan Mine for an example, the stress state in front coal body, the permeability of coal body and the change rule of gas pressure(or gradient)distribution under the heading speed of different working faces are analyzed, and the functional relations between the parameters and distance from working face were provided. Finally, based on the analysis results, the risk of outburst for a working face of Nanshan Mine was determined by the energy source and energy dissipation theory, and the safe and reasonable tunneling scheme was provided, and the scheme was successful. The results show that with the increase of driving speed, the pre-peak region decreases, the stress concentration factor increases, the permeability near the coal wall increases, the region with high permeability decreases, the gas pressure gradient in the front coal increases, the region with low gas pressure(or content)decreases, and the risk of outburst increases.关键词
安全工程/煤与瓦斯突出/掘进速度/透气性系数/瓦斯压力分布Key words
safety engineering/ coal and gas outburst/ driving speed/ permeability coefficient/ distribution of gas pressure.分类
矿业与冶金引用本文复制引用
孙喜贵..基于能量源-能量耗散理论的突出煤层最优掘进速度判定[J].煤矿安全,2019,50(11):158-163,6.基金项目
国家自然科学基金资助项目(51074086,51174109,51774170) （51074086,51174109,51774170）
