定量分析煤体破坏程度的探讨
Discussion on Quantitative Analysis of Breakage Degree of Coal
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摘要: 对原始煤体破坏程度的准确分类是研究煤与瓦斯突出危险性的重要手段，而经典的5类法已不能满足目前对煤与瓦斯突出危险程度的定量研究。通过分析煤体遭到地质构造应力的破坏过程，从粒度着手研究煤体破坏程度，共建立了0.5 mm粒径下筛分指数K、细度模数P、质量分形维数D等3个模型。结果显示，D值与煤体破坏程度关联度好、数学意义明确、使用数据丰富，可作为描述煤体破坏程度的定量指标，D值越大煤体遭到破坏的程度越剧烈。Abstract: An important research mean for coal and gas outburst is to accurately classify of the breakage degree of the original coal, but the classic five levels cannot meet the quantitative study of coal and gas outburst at present. Through the analysis of the failure process of coal by geological tectonic stress, 3 models of the particle size and extent of the breakage were built, including the screening index K of 0.5 mm particle, the fineness modulus P, and the mass fractal dimension D. The D value that has advantages of good correlation degree, clear mathematic significance and plentiful data can be used to describe the quantitative index of the breakage degree of the coal mass. The higher of D value is, the more severe of the breakage degree of the coal mass is.
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