破碎煤体再造矩形通道受力分析

为了在煤层巷道垮落后快速建立安全稳定的再生救援通道，并了解通道垮落后垮塌体的力学性质，将煤层通道垮落后破碎的煤块视为均质散粒体，通过理论分析及数值模拟，分析了在散粒体中修复新通道的基本力学特性。研究结果表明:理论分析可知，当散粒体作用在通道顶板上时，应力集中区域在顶板中部，并向两侧逐渐减小；当散粒体作用在通道两帮时，应力集中区域在两帮的底部，最大值与通道一侧的散粒体面积与截面周长的比值呈正相关；与理论分析结果相比，数值模拟分析忽略了两帮上部散粒体的影响，模拟计算所得出的应力与理论分析结果有所不同。

Stress analysis of reconstructive rectangular passage in fragmentized coal body

In order to rapidly establish a safe and stable reconstructive rescue passage after the collapse of coal seam roadway, and understand the mechanical properties of the collapse body after the collapse of passage, the fragmentized coal block after the collapse of coal seam passage was regarded as the homogeneous granular body, and the basic mechanical characteristics of repaired new passage in the granular body were analyzed through the theoretical analysis and numerical simulation. The results showed that according to the theoretical analysis, when the granular body acted on the passage roof, the stress concentration area was at the middle of roof and decreased gradually towards both sides. When the granular body acted on both sides of passage, the stress concentration area was at the bottom of both sides, and the maximum value was positively correlated with the ratio of the area of granular body at one side of passage to the sectional circumference. Compared with the results of theoretical analysis, the influence of granular body at the upside of both sides was neglected in the numerical simulation, and the stress obtained by the numerical simulation were different from the results of theoretical analysis.