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采用相似材料试验和数值模拟相结合的方法,对锚网锚杆、U型钢和吸能支护条件下煤岩巷道冲击破坏过程进行研究,揭示了巷道与支护相互作用下的巷道冲击破坏机制。试验和数值计算研究结果表明,不同支护作用下巷道冲击破坏规律表现基本一致,在冲击载荷作用下,巷道顶板有明显下沉,底板出现起鼓现象,两边帮均向巷道内部方向发生弯曲变形,形成裂缝,进而扩展和贯通,并有抛出物冲入巷道内。根据模型试验和数值计算结果可知,不同支护条件下冲击破坏程度不同,吸能支护具有良好的缓冲和吸能特性,巷道变形较小,整体稳定性好,更适合于冲击地压巷道的支护。
The impact and destruction process of coal and rock roadway under the conditions of anchor bolt, U-beam and energy-absorbing support are studied by the method of combining similar materials and numerical simulation. The impact and destruction mechanism of roadway under the interaction of roadway and support is revealed . The results of the test and numerical calculation show that the impact damage law of the roadway is basically the same under different supporting actions. Under the action of impact load, the roof of the roadway obviously sinks, the bottom plate appears as the drum, and both sides of the roadway bend to the inside of the roadway , The formation of cracks, and then expand and through, and thrown into the roadway. According to the results of model tests and numerical calculations, it is found that the impact damage under different support conditions is different, and the energy absorption support has good buffering and energy absorption characteristics. The deformation of the roadway is small and the overall stability is good. Support.