综采工作面破碎带注浆加固应用研究

Study on application of grouting reinforcement in broken zone of fully mechanized mining face

针对山西平朔井工一矿14112综采工作面158号支架至215号支架之间出现的片帮和漏顶问题,结合现场地质特点,选择了适宜注浆材料,制定了合理的注浆加固方案,并对注浆加固效果进行了评估。该项目选用硅酸盐改性聚氨酯材料和聚氨酯两种材料结合使用的方式,并采用三循环注浆方案,以解决该工作面出现的片帮和漏顶问题,为设备回撤通道提供安全保障。应用结果表明,通过材料和工艺的双向控制,第一循环共消耗63 t注浆材料,经过4刀煤之后,开展了第二次和第三次的循环注浆,未发生片帮、漏顶现象。

Aiming at the problems of rib spalling and roof leakage between No.158 support and No.215 support in No.14112 fully mechanized mining face of Pingshuo No.1 Coal Mine in Shanxi Province,combined with the geological characteristics of the site,the suitable grouting material was selected,the reasonable grouting reinforcement scheme was formulated,and the grouting reinforcement effect was evaluated.The project adopted the combination of silicate modified polyurethane material and polyurethane material,and adopts the three-cycle grouting scheme to solve the problem of rib spalling and roof leakage in the working face,so as to provide safety guarantee for the equipment withdrawal channel.The application results showed that through the two-way control of materials and processes,a total of 63 t grouting materials were consumed in the first cycle.After 4 cuts of coal,the second and third cycles of grouting were carried out,and no spalling and roof leakage occured.