CAJ | 학술논문

为探讨煤与瓦斯突出过程中的瓦斯压力效应，利用自行研制的煤岩瓦斯动力灾害模拟试验系统和配比而成的中硬度的大型煤样，在煤样的含水率、配比方案、煤样成型压力等参数均恒定的条件下，恒定3种轴向载荷时，开展了5种不同瓦斯压力梯度的煤与瓦斯突出的相似模拟实验。实验表明，煤与瓦斯相对突出强度存在一个瓦斯压力阈值，超过此阈值时，随着瓦斯压力的增大则相对突出强度大大增强，且相对强度与瓦斯压力呈现正指数的关系；瓦斯压力作为突出发生的动力并对突出煤粉有一定的粉碎和搬运作用，可形成腹大口小的倒梨形突出孔洞；轴向应力对中硬度的含瓦斯煤岩体的突出具有正作用。
위탐토매여와사돌출과정중적와사압력효응，이용자행연제적매암와사동력재해모의시험계통화배비이성적중경도적대형매양，재매양적함수솔、배비방안、매양성형압력등삼수균항정적조건하，항정3충축향재하시，개전료5충불동와사압력제도적매여와사돌출적상사모의실험。실험표명，매여와사상대돌출강도존재일개와사압력역치，초과차역치시，수착와사압력적증대칙상대돌출강도대대증강，차상대강도여와사압력정현정지수적관계；와사압력작위돌출발생적동력병대돌출매분유일정적분쇄화반운작용，가형성복대구소적도리형돌출공동；축향응력대중경도적함와사매암체적돌출구유정작용。
In order to investigate the gas pressure effect on the process of coal and gas outburst, similar simulation exper-iments were carried out for coal and gas outburst under the conditions of 5 different gas pressure and 3 axial stress with self-developed simulation test system and large medium hard coal sample when the moisture content, proportioning, coal sample forming pressure and other parameters are constant. Experiments show that there is a gas pressure threshold, when the coal and gas outburst exceeds this threshold, the higher the gas pressure becomes, the greater the relative inten-sity of outburst happens, and relative intensity and gas pressure shows positive index, gas pressure has a certain degree of crushing and conveying of extruded pulverized coal as the outburst dynamic, can form obpyriform outburst hole with small mouth and large venter, and the axial stress has a positive role on the outburst of gas-bearing medium hard coal.