综放回采巷道支护形式选择的距离判别分析方法及应用

The Application of Distance Discriminant Analysis in Selecting Support Pattern for Mining Roadway in Fully Mechanized Caving Face

选择支护形式是综放回采巷道支护设计的重要内容。根据综放回采巷道的围岩特征,以围岩强度、煤层强度、巷道埋深、围岩节理裂隙发育程度、采动影响系数、顶煤厚度、护巷煤柱宽度和断面面积作为支护形式选择的指标,借鉴距离判别分析理论,建立了综放回采巷道支护形式选择的距离判别分析模型。应用表明:距离判别分析模型选择能力强,识别精度高,是综放回采巷道支护形式选择的一种有效方法。该方法对综放回采巷道围岩道稳定性分类及支护方案选择等具有重要意义。

Selecting support pattern is an important component in support design for mining roadway in fully mechanized caving face. Based on surrounding rock features of mining roadway in fully mechanized caving face, eight main factors such as surrounding rock intensity, coal seam intensity, mining depth, joint and crack of surrounding rock, mining influence coefficient, top coal thickness, coal pillar width and section area of roadway have considered as the indexes in support pattern selection. Distance discriminant analysis model to select support pattern for mining roadway in fully mechanized caving face was established based on the principle of distance discriminant analysis. The application shows that the established distance discriminant analysis model has a great selective ability and a high precision in recognition, and is an effective method to select support pattern for mining roadway in fully mechanized caving face. It plays an important role in stability classification and selecting support pattern of mining roadway in fully mechanized caving face.