从能量角度分析瓦斯含量法预测突出的科学性

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引入有效应力、热力学概念分析了含瓦斯煤层突出潜能,通过6起突出事故能量分析,表明无论是浅部突出还是深部突出、小型突出还是特大型突出,突出释放的弹性能与瓦斯膨胀能相差25个数量级,突出能量以瓦斯膨胀能为主;在瓦斯膨胀能中,游离瓦斯膨胀能占0.07%~8.82%,解吸瓦斯膨胀能占91.18%~99.93%,瓦斯膨胀能以解吸瓦斯为主,且这个能量比例与游离、吸附瓦斯量在煤层中的赋存比例是较一致的.能量分析表明了煤层瓦斯含量及瓦斯解吸速度对于突出的重要性,瓦斯含量是突出能量的主要物质基础.通过能量法与含量法相结合,对突出的预测可以归结为具体条件下的瓦斯含量临界值问题,抽采瓦斯本质就是降低主要突出潜能,从而论证了瓦斯含量法预测煤与瓦斯突出的科学性.
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