煤层条件对顶煤可放性的影响研究
Effect of Seam Conditions on the Top Coal Caving and Drawing Characteristics
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摘要: 根据现场观测、相似材料模型试验和数值分析结果,研究了影响放顶煤开采顶煤可放性的煤层条件,提出了各种条件的临界值、影响规律和次序,得出了预测各种煤层顶煤可放性的综合表达式和分类方案。Abstract: Based on the results of field observation, simulation model experiment and numerical analysis , the seam conditions that affect the top coal caving and drawing characteristics in the sub-level caving mining are analysed. The critical values,the regularity and sequence of influence of several conditions are put forward. The forecasting formula and the classification for the top coal caving and drawing characteristics of different seams are obtained.