摘要:
通过搭建渗流实验平台,选取焦作矿区具有代表性的无烟煤型煤和原煤煤样,研究了煤体渗透性实验中型煤和原煤的差异。同时,在改变围压、气体压力等单一条件下,研究了不同围压和气体压力对型煤和原煤渗透性的影响差异;以及在固定围压和气体压力时,在施加轴向应力加载的条件下,对比分析了应力变化过程中型煤和原煤的渗透率变化。结果表明,型煤的渗透性在围压和气体压力变化时趋势相近,但在应力加载过程中有较大差异,渗流实验中煤样的选取对结果有着较大的影响。
关键词:
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型煤
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原煤
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渗透率
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围压
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气体压力
Abstract:
Through constructing permeability experimental platform, it selected the representative samples of anthracite coal and raw coal in Jiaozuo Mining Area, studied the differences between briquettes and raw coal in coal body permeability experiment. At the same time, it studied permeability effect differences of different confining pressure and gas pressure for briquettes and raw coal under the single condition of changing confining pressure or gas pressure; When confining pressure and gas pressure were changeless, under the condition of applying axial stress load, it compared and analyzed the permeability changes of briquettes and raw coal in the process of stress change. The results showed that the permeability change trend of briquettes between confining pressure and gas pressure was similar, but had big difference in the process of stress load, the selection of coal samples had great effects on the result in the permeability experiment.
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