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高应力松软煤层巷道支护技术研究及应用

Application and study on support technology of gateway in high stress and soft seam

  • 摘要: 为解决高应力松软煤层巷道难以维护的问题,基于高应力松软煤层巷道控制原理,分析新郑煤电公司煤层巷道在原有支护条件下变形破坏特征,并提出了锚网与U型钢联合支护技术。结果表明:高应力松软煤层巷道围岩离层、破裂的过程是围岩自承载能力逐步丧失的过程,单一的支护方式不能为围岩提供足够的支撑力,而采用主动支护和被动支护相结合的方式能使围岩始终保持一定的自承载能力,锚网与U型钢联合支护技术是实现该目的的重要手段。该支护条件下巷道顶底板和两帮最大移近量分别为45、100 mm左右,锚网与U型钢棚联合支护技术控制了围岩变形。

     

    Abstract: In order to solve a difficult maintenance problem of the gateway in high stress and soft seam,based on the contral principle of the gateway in the high stress and soft seam,the paper analyzed the deformation failure features of the mine seam gateway under the previous support condition in Xinzheng Coal and Electric Power Co mpany and provided a combined support technology with bolt 1 steel mesh and U type steel. The results showed that the surrounding rock bed separation and breaking pro cess of the gateway in the high stress and soft seam was the self loading capacity steadily lost process of the surrounding rock. A single support method could not supply a sufficient support force to the surrounding rock. An active support and passive support combined method could make the surrounding rock always to keep certain self loadi ng capacity and the bolt 1 steel mesh and U type steel combined support technology would be an important means to realize the target. Under the support condition,the roo f and floor and the two sidewalls of the gateway would have the max convergence about 45 and 100 mm individually. The bolt 1 steel mesh and U type steel frame combine d support technology could control the deformation of the surrounding rock.

     

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