摘要
为揭示工作面煤层瓦斯压力与采动应力耦合特征,针对不同应力状态,深入开展了工作面煤层瓦斯压力与采动应力"异步-同步"特征研究。结果表明,工作面煤层力学状态是引起瓦斯压力与采动应力耦合特性差异的根本所在。受采动影响,当工作面煤层发生扩容力学现象,煤层瓦斯压力峰值与采动应力峰值位置呈现异步特性,且瓦斯压力峰值位置超前于采动应力;当工作面煤层未发生扩容力学现象,煤层瓦斯压力峰值与采动应力峰值位置呈现同步特性。工作面瓦斯压力与采动应力耦合效应的"异步-同步"特性研究成果,为煤与瓦斯动力灾害有效防治提供了科学理论依据。
In order to reveal the coupling characteristics of coal seam gas pressure and mining-induced stress at coalface, the intensive study of coupling characteristics of coal seam gas pressure and the mining-induced stress in working face has been conducted according to the different stresses. The results show that coal mechanical state in working face is fundamental to the difference of coupling gas pressure and mining-induced stress of coal seam. Under the influence of mining,the peak position will assume asynchronous features between gas pressure and mining-induced stress of coal seam in working face and the peak position of gas pressure will present itself before the stress of mining when dilatancy happens;their peak positions will assume synchronous characteristics when the dilatancy doesn＇t happen. The research of asynchronous and synchronous characteristics of coupling effect of gas pressure and mining-induced stress in working face provides the scientific evidence to effective prevention and control of the coal and gas dynamic disaster.
出处
《采矿与安全工程学报》
EI
CSCD
北大核心
2015年第6期1037-1042,共6页
Journal of Mining & Safety Engineering
基金
国家自然科学基金项目(U1361208,51174003)
国家重点基础研究发展计划(973)项目(2014CB260403)
安徽省教育厅自然科学基金重点项目(KJ2015A048)
关键词
瓦斯压力
采动应力
异步-同步特征
扩容
gas pressure
mining-induced stress
＂asynchronous and synchronous＂characteristics
dilatancy
