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振动是诱发煤与瓦斯突出的重要因素,为此实验研究了振动对瓦斯吸附的作用并从理论上分析了振动对煤体结构的影响,探讨了振动诱发煤与瓦斯突出的机理.结果表明:在振动作用下,煤对瓦斯的吸附量有一定程度的减少,吸附能力降低;振动延长了煤样达到吸附平衡的时间,使吸附平衡压力与未加振动时有所升高,煤样中游离瓦斯增多;振动使煤体内的裂隙增加并扩展,当振动强度达到一定值时煤体内形成较大范围的连通裂隙网;在振动对煤体和瓦斯产生的综合作用下,煤与瓦斯突出的危险性大大增加.
Vibration is an important factor to induce coal and gas outburst. Therefore, the effect of vibration on gas adsorption is studied experimentally and the effect of vibration on the structure of coal is theoretically analyzed, and the mechanism of vibration induced coal and gas outburst is discussed.The results show that: Under the action of vibration, the amount of gas adsorbed by coal decreases to a certain extent and the adsorption capacity decreases. Vibration prolongs the time when the coal sample reaches the adsorption equilibrium and the adsorption equilibrium pressure increases with no increase in vibration pressure. Gas increases; vibration increases and expands the cracks in the coal body, when the vibration strength reaches a certain value, a large range of connected fracture network is formed in the coal body; under the combined action of vibration and coal and gas, the risk of coal and gas outburst Sex greatly increased.