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深部煤层底板采动损伤指数取决于采场底板的应力场、底板岩体的节理分布和应用的采煤方法。建立了深部煤层采动损伤指数控制指标体系,分析了各控制指标在损伤过程中的耦合作用。在此基础上,分析并建立综合主成分模型并筛选出深部煤层采动损伤指数的13个主控指标。结果表明:应用综合主成分分析能将定性问题转化为定量问题,可以比较客观、准确地对类似复杂非线性问题进行分析。
The mining floor damage index of deep coal seams depends on the stress field of stope floor, the joint distribution of floor rock mass and the coal mining method applied. The index system for controlling the mining damage index in deep coal seams is established, and the coupling effects of various control indexes during the damage process are analyzed. On this basis, 13 main control indexes for analyzing and establishing the integrated principal component model and screening the mining damage index of deep coal seams are selected. The results show that the application of the integrated principal component analysis can transform the qualitative problem into the quantitative problem, which can objectively and accurately analyze the similar complex nonlinear problems.