动静加载下含瓦斯煤层突出试验研究

Experimental study on outburst of gas-containing coal under static and dynamic loads

为研究深部复杂应力环境中煤层开采受动态载荷扰动发生煤岩动力灾害的过程和机理,采用河南理工大学自主研制的动静载条件下煤与瓦斯突出模拟试验设备,模拟了静态和动态组合加载作用下煤与瓦斯突出现象,进行了瓦斯吸附条件下的动静载突出试验,深入研究了瓦斯吸附量对突出的影响。结果表明:在相同的动态载荷作用下,无瓦斯解吸过程比有瓦斯解吸过程更容易发生突出;无煤柱影响比有煤柱影响更容易发生突出,并且无煤柱影响的突出强度比有煤柱影响的要大。研究结果对于煤层瓦斯突出机理的研究具有重要的参考意义。

In order to study the process and mechanism of coal and gas outbursts caused by dynamic loads in complex stress environment in deep mining condition, simulated experimental equipment for coal and gas out- burst under dynamic and static loading conditions was developed independently by Henan Polytechnic Univer- sity. The phenomena of coal and gas outburst under the coupling of static and dynamic loads were simulated, coal and gas outburst experiments were carried out under the condition of gas adsorption, and the influences of gas adsorption on coal and gas outburst were studied in depth. The results showed that the ability of non-gas desorption and non-coal pillar to induce coal and gas outburst was stronger than that of gas desorption and coal pillar under a same impact load. And the outburst strength of non-coal pillar was bigger than that of coal pillar. The research results had important practical significance for the study of coal seam gas outburst mechanism.