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通过分析指出了大倾角“三软”煤层走向长壁工作面顶底板运动的规律及其垮落的形式和特点。对大倾角“三软”煤层工作面使用下行收作法进行了可行性分析和论证 ,并在实践的基础上介绍了大倾角“三软”煤层工作面的下行收作法
Through the analysis, it points out the law and the form and characteristics of caving of the roof and floor of longwall face with “big soft” coal seam with big inclination. Feasibility analysis and demonstration are carried out on the working face of “three soft” coal seam with large dip angle using the down approach, and on the basis of practice,