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为解决大倾角煤层变角度综放工作面“支架-围岩”系统稳定性控制的难题,以枣泉煤矿120210工作面综放开采为工程背景,采用平面相似模拟实验、理论分析现场矿压观测等综合研究方法,重点研究了角度变化过渡区域“支架-围岩”系统稳定性,分析得出了大倾角变角度综放采场围岩变形破坏及支架稳定性的分区域特征.结果表明:在大倾角变角度工作面,上部区域是安全高效生产的主体区域,下部区域是整体稳定性的基础,中部区域是安全高效生产与系统稳定协调转换的关键区域,并提出基于工作面仰伪斜变角度布置、顶煤放出量和支架工作阻力分区域控制的大倾角变角度工作面围岩稳定性控制技术.
In order to solve the problem of stability control of “bracket-surrounding rock” system in fully mechanized caving mining face with variable angle in steeply inclined coal seam, based on the fully mechanized caving mining face of 120210 working face in Zaoquan Coal Mine, the plane similar simulation experiment is used to analyze the rock pressure in situ And other comprehensive research methods, the stability of the “bracket-surrounding rock” system in the transitional area of angle change is studied emphatically, and the sub-regional characteristics of deformation and failure of the surrounding rock and the stability of the support are analyzed.The results show that: In the steeply inclined face, the upper region is the main area for safe and efficient production, while the lower region is the basis of overall stability. The middle region is the key area for safe and efficient production and system stable coordination conversion. Variable angle arrangement, top coal release and support working resistance sub - zone control of the large angle variable angle face rock stability control technology.