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为了深入研究煤与瓦斯突出的机制,从能量角度对煤与瓦斯突出有进一步认识和理解,基于煤与瓦斯突出综合作用假说,采用理论分析与试验相结合的方法,对煤与瓦斯突出的能量耗散情况进行深入分析,得到弹性潜能和瓦斯内能的计算表达式。建立煤巷掘进煤与瓦斯突出力学模型,得到突出煤体与堆积位置的数学函数关系式,并根据突出煤体的堆积状态和破碎情况,计算突出煤体的移动功、摩擦功和破碎功,从而构建煤与瓦斯突出和煤、瓦斯的物理力学参数、巷道结构参数之间的突出条件式。研制高压气体瞬间对称卸压破煤试验装置,从试验角度分析煤的力学性质、瓦斯和地应力对煤与瓦斯突出的影响因素,对煤与瓦斯突出进行试验模拟。试验结果表明:突出煤的抗压强度、坚固性系数明显低于非突出煤;在单因素瓦斯作用下,较低的瓦斯压力不能使完整的煤体破碎抛出,地应力对煤与瓦斯突出有着重要影响;煤与瓦斯突出是一个温度下降过程。
In order to further study the mechanism of coal and gas outburst, we can further understand and understand the coal and gas outburst from the energy point of view. Based on the hypothesis of combined effect of coal and gas outburst, the method of combining theoretical analysis and experiment is used to analyze the energy of coal and gas outburst Dissipative situation in-depth analysis to obtain elastic potential and gas inner energy of the expression. The mechanical model of coal heading and gas outburst is established to get the mathematical function of the prominent coal body and its stacking position. According to the pile-up state and the crushing of the protruding coal body, the moving work, friction work and crushing work of the protruding coal body are calculated, Thus, the prominent condition formulas between coal and gas outburst, coal and gas physical and mechanical parameters and roadway structure parameters are constructed. The instantaneous symmetrical pressure-relief coal-breaking test device for high-pressure gas was developed. The mechanical properties of coal, the influencing factors of gas and ground stress on the coal and gas outburst were analyzed from the experimental point of view, and the simulation of coal and gas outburst was simulated. The test results show that the compressive strength and the solidity coefficient of the protruding coal are obviously lower than those of the non-protruding coal. Under the single-factor gas, the lower gas pressure can not disintegrate and throw the complete coal, and the stress of the coal and gas outburst Has an important impact; coal and gas outburst is a temperature drop process.