The authors perform numerical modeling for the comprehensive stress-strain analysis of roof rocks above powered roof support units in the longwall top coal caving technology. Passive control of top coal prefracture fails to maintain efficient disintegration and well-proportioned flow feed on armoured face conveyor. The relations between the residual and initial strength of coal and the prop of the powered roof support units at different combinations of methods and means of active control are obtained; their ranges of application and the proportioned flow rates are determined.

中文翻译：

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厚缓倾煤层放顶煤技术中的主动预压方法

作者对长壁放顶煤技术中动力顶板支架上方顶板岩石的综合应力-应变分析进行了数值模拟。顶煤预压裂的被动控制无法在装甲工作面输送机上保持有效的崩解和均匀的流动给料。得到了不同主动控制方法和手段组合下煤的残余强度和初始强度与动力顶板支架支撑的关系；它们的应用范围和比例流量是确定的。