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Experimental study on the influence mechanism of gas seepage on coal and gas outburst disaster

机译:瓦斯渗漏对煤与瓦斯突出灾害影响机理的实验研究

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摘要

By using the self-developed triaxial servo-controlled seepage equipment for thermo-fluid-solid coupling of coal containing gas and the self-developed coal and gas outburst simulation test device, experiments to study the influence mechanism of gas seepage on coal and gas outburst disasters. The results show that: (i) gas seepage decreases the strength of coal containing gas and accelerates its failure process; (ii) under the same gas pressure, the confining pressure is larger, the more difficult the gas flows and the greater the intensity of coal containing gas is; (iii) in the process of coal and gas outburst, the greater the vertical ground stress is, the more powerful the outburst will be; (iv) the influence mechanism of gas seepage on coal and gas outburst disasters is as follows: firstly, gas seepage weakens the mechanical properties of coal body, which makes it much easier for coal and gas outburst to occur; secondly, on the same effect of external force, it will be easy to form a high gas pressure zone in the coal body under the difficult condition of gas seepage, and accumulate more gas compression energy, which is the energy source for coal and gas outburst, and it is also the main dynamic source to throw and grind the coal.
机译:利用自主研发的三轴伺服渗漏设备进行含瓦斯热流固耦合及自主研发的煤与瓦斯突出模拟试验装置,研究了瓦斯渗漏对煤与瓦斯突出的影响机理。灾难。结果表明:(i)瓦斯渗漏降低了含煤瓦斯的强度并加速了瓦斯的破坏过程; (ii)在相同的气体压力下,围压越大,气体流动越困难,含煤气体的强度越大; (iii)在煤与瓦斯突出过程中,垂直地面应力越大,突出作用越强; (iv)瓦斯渗漏对煤与瓦斯突出灾害的影响机理如下:首先,瓦斯渗漏削弱了煤体的力学性能,使煤与瓦斯突出的发生更加容易;其次,在外力作用相同的情况下,在气体渗流困难的情况下,容易在煤体内形成高压区域,并积累更多的瓦斯压缩能,这是煤与瓦斯突出的能源。 ,也是抛煤和磨煤的主要动力来源。

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