基于解析-数值耦合法的瓦斯压力预判方法
发布时间：2018-12-06 07:00
【摘要】：瓦斯压力是煤层瓦斯的重要基础参数,为了掌握煤层瓦斯压力,基于煤层瓦斯连续方程进行了瓦斯压力与煤层倾斜长度解析模型的推演,针对推演出的模型结合数值拟合方法建立了一种解析-数值耦合的瓦斯压力预判方法。为便于比较该方法与一般数值拟合的差异,选择了浅埋煤层及深部煤层两个差异化样本。不同样本下,一般数值拟合方法与耦合方法预判结果显示:样本Ⅰ中不同预判方法的相关性系数均在0.9874之上,样本Ⅱ中不同的预判模型相关性系数差异较大,耦合模型相关性系数最大为0.7786;样本Ⅰ中标准差数值及不同方法间差异均较小,样本Ⅱ中标差差异较明显;一般预判方法瓦斯压力增长梯度随倾斜长度的增加逐渐变大与实际不符,耦合方法瓦斯压力随倾斜长度增长趋于稳定与实际情况一致;不同预判模型下瓦斯压力生长曲线不因样本差异而有较大的波动。综合不同样本瓦斯压力预判结果可知,浅埋煤层瓦斯压力预判可应用线性回归方法,深部煤层瓦斯压力预判应用耦合方法与实际更相符。
[Abstract]:Gas pressure is an important basic parameter of coal seam gas. In order to master the gas pressure of coal seam, the analytical model of gas pressure and inclined length of coal seam is deduced based on the continuous equation of coal seam gas. Based on the derived model and numerical fitting method, an analytical-numerical coupled method for predicting gas pressure is established. In order to compare the difference between this method and general numerical fitting, two different samples of shallow coal seam and deep coal seam were selected. Under different samples, the results of general numerical fitting method and coupling method show that the correlation coefficients of different prediction methods in sample 鈪，
本文编号：2365624
[Abstract]:Gas pressure is an important basic parameter of coal seam gas. In order to master the gas pressure of coal seam, the analytical model of gas pressure and inclined length of coal seam is deduced based on the continuous equation of coal seam gas. Based on the derived model and numerical fitting method, an analytical-numerical coupled method for predicting gas pressure is established. In order to compare the difference between this method and general numerical fitting, two different samples of shallow coal seam and deep coal seam were selected. Under different samples, the results of general numerical fitting method and coupling method show that the correlation coefficients of different prediction methods in sample 鈪，
本文编号：2365624
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