综放工作面过断层注浆加固技术

Grouting Reinforcement Technology in Crossing Fault at Fully-mechanized Caving Face

本文以小峪煤矿8102工作面过断层为工程背景,提出了采用双液注浆材料进行浅层堵漏、高性能单液注浆材料进行深孔注浆的过断层施工工艺,根据8102工作面推进速度以及注浆材料达到峰值强度所需时间,并结合工作面前方煤体裂隙发育情况,确定在工作面前方45 m开始进行注浆。工程实践表明:通过实施注浆加固技术,有效降低了片帮、冒顶事故发生的频率及程度,工作面推进速度由0.88 m/d提高至1.35 m/d,实现了综放工作面安全、快速通过断层。

The paper presents the construction technology of crossing fault by shallow plugging with double liquid grouting material and deep hole grouting with high-performance single-fluid grouting material at 8102 working face of Xiaoyu Colliery,in which grouting is carried out 45 m ahead of the working face according to the advancing speed,the time needed for grouting material peak intensity,and the fracture development of coal body,effectively reducing the frequency and degree of rib spalling and roof caving,increasing the advancing speed of working face from 0.88 m/d to 1.35 m/d and realizing the safe and rapid fault crossing at fully mechanized caving face.