基于主成分分析法的煤层瓦斯压力影响因素分析

Influence Factors Analysis of Coal Seam Gas Pressure Based on Principal Component Analysis

为确定阜康地区煤层瓦斯压力影响因素的影响程度,结合朗格缪尔方程,选用阜康矿区矿井现场实测瓦斯基础参数为对象,分析了影响瓦斯压力的7项因素。采用主成分分析法,对煤层瓦斯压力影响因素进行了主成分提取,选取了3个主成分代替原来的7项影响因素,并进行了定量分析,进而确定了各因素的影响程度。结果表明:在阜康矿区煤的灰分对煤层瓦斯压力的大小影响最大,占总影响程度的27.9%;瓦斯含量、水分、孔隙体积、视密度、吸附常数a值次之,分别为23.6%、20.8%、11%、10.6%、3.9%;吸附常数b最小,影响比例为2.2%。

In order to determine the impact from gas pressure influence factors in Fukang mining area, selecting the on - site test pa- rameters of gas in Fukang mining area and through the Langmuir equation, seven influencing factors of gas pressure are analyzed. Three main factors are seleted to replace seven original factors affecting gas pressure by principal component analysis, the effect of influencing factor is calculated through the quantitative analysis. The results show that the ash of the coal has the highest influence on the gas pres- sure, the proportion is 27.9 %, the methane content, the moisture, the pore volume, the coal visual density, gas adsorptive constant are secondary, the proportions are 23.6 %, 20.8 %, 11%, 10.6 %, 3.9 % respectively. The gas adsorptive constant is the least, the proportion is 2.2 %.