摘要
为了充分认识煤与瓦斯突出(简称"突出")的动态演化过程,自主研发了多场耦合煤矿动力灾害物理模拟试验系统,并利用该系统开展了气-固耦合作用下的突出试验.结果表明:突出过程中煤层瓦斯压降速度对最大主应力的响应特性更好,压降区自煤层底部向上扩展.煤层内的温降区自突出孔扩展,与瓦斯压力的下降过程相似.固相煤粉流的运动过程存在二次加速特征.突出前期,巷道内冲击力值较低.随着膨胀波的叠加,在巷道中部出现较强的叠加压缩波.该套试验系统能够真实再现气-固耦合作用下的突出全过程,并获得煤层及巷道内不同断面的多物理场演化云图,从而更直观地揭示突出的演化过程.
In order to fully understand the dynamic evolution process of coal and gas outburst(abbreviated as "outburst"), a multi-field coupled coal mine dynamic disaster simulation test system was developed and used to carry out outburst tests under gas-solid coupling. The results show that the gas pressure drop velocity presents a better response to the maximum principal stress during the outburst, and the pressure drop zone expanded upward from the bottom of the coal seam. The drop zone of coal seam temperature expanded from the outburst cavern and showed a similar pattern with the decline of gas pressure. The motion process of outburst coal presented a secondary acceleration characteristic. In the early stage of outburst, the impact force in the roadway was weak. With the superposition of expansion wave, a strong superimposed compression wave appeared in the middle of the roadway. The test system can truly reproduce the whole process of outburst under the action of gas-solid coupling, and the cloud map of different sections in the coal seam and roadway can be obtained. Based on this, the evolution process of outburst can be revealed more intuitively.
作者
周斌
许江
彭守建
闫发志
杨威
程亮
杨孝波
ZHOU Bin;XU Jiang;PENG Shoujian;YAN Fazhi;YANG Wei;CHENG Liang;YANG Xiaobo(State Key Laboratory of Coal Mine Disaster Dynamics and Control,Chongqing University,Chongqing 400044,China;Key Laboratory of Coal Methane and Fire Control,Ministry of Education,China University of Mining and Technology,Xuzhou,Jiangsu 221116,China)
出处
《中国矿业大学学报》
EI
CAS
CSCD
北大核心
2020年第6期1067-1076,共10页
Journal of China University of Mining & Technology
基金
国家自然科学基金项目(51874055)
中国博士后科学基金项目(2018M633317)。
关键词
煤与瓦斯突出
瓦斯压力
煤层温度
两相流
冲击力
coal and gas outburst
gas pressure
coal seam temperature
two-phase flow
impact force
