迎采对掘沿空掘巷的有效围岩控制措施

Effective Surrounding Rock Control Measures for Gob-side Entry Driving of Relative Tunneling

为解决大同矿区个别矿井存在的迎采对掘沿空掘巷围岩安全控制问题,对燕子山矿小煤柱巷道采取了“水射流切顶卸压、交锋阶段巷道停掘、组合锚索配合单体分段强力支护”措施,矿压观测表明,巷道围岩变形以两帮移近和底鼓为主,顶板完整,煤柱侧喷浆后无明显大裂缝产生,巷道围岩保持稳定。

In order to solve the problem of safety control of surrounding rock of relative tunneling for gob-side entry in individual mines in Datong mining area, the measures of "water jet roof cutting and pressure relief, roadway stop excavation in the confrontation stage, combined anchor cable and monomer segmented strong support" were adopted for the small coal pillar roadway in Yanzishan mine. The mine pressure observation showed that the deformation of surrounding rock of roadway was mainly two-way approaching and floor heave, the roof was complete. There was no obvious large cracks after coal pillar side grouting, and the surrounding rock of roadway remained stable.