Abstract:The layout of wide alleys in mines can cause waste of working face resources. To solve the problems of coal waste and gas emissions caused by the layout of wide tunnels in high gas mines, this article proposes a technical solution for constructing concrete walls into tunnels. By using numerical simulation methods, the stress distribution law of surrounding rock in different widths of concrete wall tunnels was analyzed, and the material ratio for constructing concrete walls using flexible formwork pumping technology was studied. The optimal height of concrete wall tunnels was revealed, and the concrete wall tunnel technology was optimized based on actual situations. The results indicate that when the width of the concrete wall is 1.6m, the stress concentration of the isolation wall is the smallest, it has good bearing capacity, and is less prone to plastic failure and instability under the influence of mining. The combined application of flexible formwork pumping technology to construct concrete walls and support technology can effectively maintain the deformation of surrounding rocks. This study has achieved pillar free mining in high gas mines, providing a certain theoretical basis and phenomenon basis for maintaining the stability of tunnel surrounding rock.
