不同性质煤的微观特性及渗透特性对比试验研究

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Abstract Tests of microscopic characteristics and seepage properties were done respectively，using different coals from the typical coal mines. The results show that specific surface area and adsorption/desorption capacity of outburst coal is higher than those of delay outburst coal and non-outburst coal，and delay outburst coal at intermediate between the two others. Adsorption capacity of outburst coal is strong，desorption velocity is very fast too. It can form very high gas pressure which enhance destructiveness of coal-rock. Permeability of non- outburst coal is about 4 times higher than those of other coals at the largest department. If coal?s seepage properties are excellent，methane moves very easy in the coal seam in which gas storage condition is very poor and methane detaches very easy from it. Conversely，the outburst risk may increase. It is shown that the seepage property is an important index of the outburst risk of the coal seam. In a word，the seepage property and microscopic characteristics of coal are closely related to which the coal has strong adsorption/desorption characteristics，relatively poor seepage property，rather low strength，and is easy to fail. So it has very high outburst risk.

Key words： mining engineering microscopic characteristics seepage properties adsorption/desorption characteristics specific surface area coal and mathane outburst

Received: 07 October 2010

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https://rockmech.whrsm.ac.cn/EN/Y2011/V30/I3/500

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