单位等量解吸焓对煤与瓦斯突出综合作用假说的补充
Supplement of unit equal desorption enthalpy to comprehensive action hypothesis of coal and gas outburst
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摘要: 基于平顶山五矿中阶原生煤和构造煤的系列等温吸附实验数据计算温度-压力-吸附方程（TPAE）参数。通过TPAE方程计算结果证实，吸附是可以自发进行的放热反应，解吸是无法自发进行的吸热反应；热力学计算证明当吸附量增加，其单位等量解吸焓却按幂函数关系下降；原生煤单位等量解吸焓是构造煤单位等量解吸焓的2.2倍；煤靠吸收环境能量进行瓦斯解吸、降低温度、升高压力；而瓦斯压力升高和温度降低都有利于其余煤增加吸附以达到新的瓦斯气液平衡；煤吸附量持续增加带来的直接后果是其单位等量解吸焓的持续下降；环境能量输入与瓦斯内能蓄积转移显示互为诱因、互相强化，直至新一波的环境能量输入，诱发吸附瓦斯解吸达到足够高的压差梯度发生瓦斯突出；瓦斯突出是按准备、启动、发展和终止的先后次序发生；准备与启动的分段节点是有无工程活动，启动与发展的分段节点是圈闭瓦斯的煤壁是否被突破，发展与终止的分段节点是构造煤的吸附量是否接近于0。
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关键词:
- 温度-压力-吸附方程 /
- 单位等量解吸焓 /
- 瓦斯内能 /
- 吸附解吸 /
- 煤与瓦斯突出
Abstract: Temperature-pressure-adsorption equation （TPAE） parameters were calculated based on a series of isothermal adsorption experimental data from medium rank normal coal and deformed coal in Pingdingshan No.5 mine. The results of TPAE show that the adsorption is a spontaneous exothermic reaction, and the desorption is not a spontaneous endothermic reaction. The thermodynamic calculation proves that when the adsorption amount increases, its unit isosteric enthalpy of desorption decreases according to the power function relationship. The unit isosteric enthalpy of desorption of normal coal is 2.2 times that of deformed coal. Coal absorbs environmental energy to desorb gas, reduce temperature, and increase pressure; rising pressure and lowing temperature are promoting the adsorption of coal, which results in a new gas liquid equilibrium. The direct consequence of the continuous increase of coal adsorption is the continuous decline of its unit isosteric enthalpy of desorption. The ambient energy input and the gas internal energy accumulation and transfer show mutual inducement and mutual reinforcement, until the new wave of environmental energy input, induce gas desorption to reach a high pressure gradient sufficiently to cause gas protrusion. The preparation, initiation, development, and termination of gas outburst are sequential processes. The segment node for separating outburst preparation and initiation is whether there is human engineering activity. The segment node for separating initiation and development is whether the wall of the system is broken. The segment node for separating development and termination is whether the adsorption amount of the deformed coal is close to zero. -
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