厚煤层沿空巷道合理煤柱宽度留设及围岩控制研究

Research on Reasonable Coal Column Width along Gob-side Entry and Surrounding Rock Control in Thick Coal Seam

为解决18504与18506工作面间合理煤柱宽度留设及有效控制18506工作面辅运巷围岩变形的问题,根据18506工作面地质条件对辅运巷的支护参数进行设计,并实施矿压观测。结果表明:两工作面间合理煤柱宽度为19m,18506工作面辅运巷在19m护巷煤柱宽度现有支护方式下锚杆(索)受力和围岩变形量合理,满足回采巷道的使用要求。

In order to solve the problem of setting reasonable coal column width between the 18504 and 18506 working face and effectively control the surrounding rock deformation of the auxiliary roadway in the 18506 working face, according to the geological conditions of the 18506 working face, the supporting parameters of auxiliary roadway are designed, and the observation of mine pressure is carried out. The results show that the reasonable width of coal pillar between two working faces is 19m, and the bolt (cable) stress and surrounding rock deformation are acceptable by using the existing support mode with 19m coal pillar width for protecting roadway of the 18506 working face, which can meet the operating requirements of mining roadway.