放顶煤开采顶煤冒放性分类及其在潞安矿区的应用

The classification of top coal cavability and its application in Lu’an coal mine

运用动态模糊聚类方法, 以煤层强度、赋存深度、节理裂隙发育程度、夹矸厚度、采空区充满程度、老顶级别、采放比等7个因素按模糊最大隶属度原则综合评价顶煤冒放性. 建立了模糊聚分析方法的数学模型, 以上述7个指标为基础, 对顶煤冒放性的模糊聚类分析进行运算,给出分类的实施过程. 潞安矿区顶煤冒放性分类结果表明, 5对主要生产矿井主采3号煤层, 其顶煤冒放性皆为好(Ⅰ类) 和较好(Ⅱ类), 经潞安矿区综放开采实践证实, 分类合理.

By using of dynamic fuzzy group method, the top coal cavability was evaluated according to the following seven factors, such as coal seam strength, mining depth, crack developing extent’s features, dirt band height, filling situation of goaf, classification of main roof and the ratio of mining and caving height etc. Based on these researches, the comprehensive evaluating model of top coal cavability by fuzzy mathematics theory was proposed and the classified work of top coal cavability in Lu’an No.3 coal seam was carried out. Results indicate that the top coal cavability belongs in Ⅰand Ⅱ types which is reasonable approved in Lu’an mining practice.