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中文摘要：
为探讨瓦斯压力在煤与瓦斯突出过程中的作用机制,利用自主研制的煤与瓦斯突出模拟试验台和同一种煤样,在煤样成型压力、煤样含水率、受力状况等参数均恒定的情况下,分别进行了5种不同瓦斯压力水平下的煤与瓦斯突出模拟实验。结果表明,煤与瓦斯突出可形成口小腹大的呈梨形或椭圆形的突出孔洞,且突出孔洞容积仅为突出煤体积的1/2～2/3;在瓦斯压力方面存在一个使煤与瓦斯突出发生与否的阀值,高于此阀值时,瓦斯压力愈大则突出强度亦愈大,且瓦斯压力作为突出发生的动力同时也对突出煤粉有一定的粉碎和抛出作用;煤样温度呈先升高后降低并连续变化的趋势,利用温度变化梯度可进行煤与瓦斯突出预测预报。
英文摘要：
To discuss the mechanism of gas pressure in coal and gas outburst process,with the constant of moulding pressure,moisture and forced status of the outburst coal sample,five outburst experiments of the different gas pressure are simulated by the independently developed coal and gas outburst simulation test device and the same coal sample.It is found that coal and gas outburst could produce pyriform or elliptic holes with small mouth and big belly.And the volume of hole to the volume of outburst coal is from 1/2 to 2/3.Moreover,there is a threshold value of gas pressure for coal and gas outburst and greater with the increase of outburst intensity.As the force of outburst,the gas pressure has a certain effect of ejection and porphyrization on the outburst coal powders.The coal sample temperature varies continuously with the trend of rising firstly and decreasing subsequently.And the grads of coal temperature can be adopted for predicting the coal and gas outburst.
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