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本文采用三维空间有限元电子计算机模拟计算的研究手段,分析了综采工作面直接顶板破碎的原因。着重研究了综采支架与直接顶板的相互关系,分析了综采支架在“支撑—采煤—降压移架”这一完整的支护循环过程中,直接顶板的应力分布变化及破坏发展过程,指出综采支架卸载范围大、初撑力过高是导致顶板稳定性降低的重要原因。
In this paper, three-dimensional finite element computer simulation of computer research methods, analysis of fully mechanized mining face direct roof broken reason. The relationship between the fully mechanized mining support and the direct roof is studied emphatically. The change of the stress distribution and the process of the failure of the direct roof are analyzed during the complete supporting and supporting process of the “fully mechanized mining support - coal mining - lowering pressure moving frame” It is pointed out that the unloading scope of fully mechanized coal mining support is too high and the initial propping force is too high, which is an important reason for the decrease of roof stability.