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为了研究侏罗系煤开采导水断裂带高度,首先基于区域侏罗系煤层开采导水断裂带高度实测数据,分析认为其与现行规范经验公式计算结果存在较大差异;采用多元回归分析,建立了适用于研究区导水断裂带高度预测的多元非线性公式。然后考虑大规模煤层开采顶板工程地质参数动态变化特征,选用RFPA软件,以金鸡滩煤矿为例,模拟分析了侏罗系煤层大采高综放开采顶板变形破坏动态过程及裂隙发育高度。结果表明:多元非线性公式预计误差较其他公式小,采用多元非线性公式预计金鸡滩矿综放工作面导水断裂带高度为176.68 m,数值模拟结果为174.80 m,二者较为相符。
In order to study the height of aqueduct in Jurassic coal mining, based on the measured data of the aqueduct in the Jurassic coal seam in the region, it is considered that there is a big difference between the experimental data and the current empirical formula. Using multiple regression analysis, The multivariate nonlinear equations suitable for predicting the height of water-conducting fracture zone in the study area. Considering the dynamic characteristics of roof geological parameters in large-scale coal seam mining, RFPA software was used to take Jinjiatan coal mine as an example to simulate the dynamic process of deformation and failure of roof and the height of fractures in the fully mechanized top-coal caving mining face with large mining height in Jurassic coal seam. The results show that the prediction error of multivariate nonlinear formula is smaller than that of other formulas. By using multivariate nonlinear formula, it is estimated that the height of hydraulic conductivity fault in fully mechanized caving face in Jinjitan Mine is 176.68 m and the numerical simulation result is 174.80 m.