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利用数值模拟软件FLAC3D,分析了巷道上方煤层开采时,在底板支承压力不断前移的情况下巷道围岩的应力以及塑性区变化规律,研究巷道的初始破坏位置,得出了巷道首先在靠近工作面一侧的拱腰部位破坏,然后依次是巷道底板、远离工作面一侧的拱腰部位,基于此破坏规律,提出相应的锚梁网索和注浆锚杆联合支护技术。
The numerical simulation software FLAC3D was used to analyze the stress and plastic zone variation of the surrounding rock under the condition of continuous support pressure at the bottom of the roadway when mining the coal seam. The initial damage position of the roadway was studied. According to this rule of failure, the corresponding anchor beam net and grouting bolt joint support technology are put forward.