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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摘要对从典型矿井取得的不同性质煤，分别进行微观特性和瓦斯渗透特性试验。结果表明：突出煤的比表面积和吸附/解吸能力明显高于延期突出煤和非突出煤，延期突出煤介于二者之间。突出煤吸附能力强，解吸速度相对也较快，可能形成较高的气体压力，对煤岩的破坏性增强。非突出煤的渗透率明显高于突出煤和延期突出煤的渗透率，相差最大处超过4倍以上，煤的渗透特性好，瓦斯就较易在煤层中运移，煤层的储气条件差，瓦斯更容易从煤层中脱离出来，反之则会增加突出危险性。说明渗透特性是考察煤层是否具有突出危险性的一个重要指标。总之，煤的渗透特性和微观特性是密切相关的，吸附/解吸特性能力强，煤的渗透特性相对较差，强度较低，较易发生破坏，突出危险性较大。

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关键词 ：采矿工程, 微观特性, 渗透特性, 吸附/解吸特性, 比表面积, 煤与瓦斯突出

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

收稿日期: 2010-10-07

引用本文:

李晓泉1，尹光志2，3. 不同性质煤的微观特性及渗透特性对比试验研究[J]. 岩石力学与工程学报, 2011, 30(3): 500-508.
LI Xiaoquan1，YIN Guangzhi2，3. CONTRAST TEST OF MICROSCOPIC CHARACTERISTICS AND SEEPAGE PROPERTIES OF DIFFERENT COALS. , 2011, 30(3): 500-508.

链接本文:

http://www.rockmech.org/CN/Y2011/V30/I3/500

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