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综采放顶煤工作面顶煤冒放性受多方面因素的影响 ,针对综放采场的特点 ,建立力学模型 ,以悬梁拉应力破坏作为强度准则和采用关键块体理论 ,分别对单组裂隙和多组裂隙的分布方位、间距、倾角及层理发育程度对顶煤冒放性的影响进行了研究和分析。同时对顶煤冒块的形状特征和块径大小对顶煤放出难易程度的影响规律进行了研究 ,提出了工作面布置和裂隙分布最佳匹配 ,能够改善综放开采顶煤冒放性的观点 ,为提高综放工作面顶煤放出率开辟了一条可行的途径。
In view of the characteristics of fully mechanized caving face, the mechanical model is set up. According to the tensile stress of cantilever beam as the strength criterion and the key block theory, The influence of fracture orientation, distribution orientation, spacing, dip angle and degree of bedding development on the roofing coal runoff was studied and analyzed. At the same time, the influence law of the shape characteristics and block size of top coal rised to the ease of top coal release was studied, and the optimal matching of working face layout and fracture distribution was proposed to improve the top coal caving capacity Point of view, to open up a feasible way for the top coal release rate of fully mechanized caving face.