近距离下层煤综采面顶板稳定性与加固技术的研究

Study on Roof Stability and Reinforcement Technology for Fully Mechanized Mining Face of Close Lower-level Coal Seams

针对霍州煤电集团汾源煤业有限公司近距离10号煤层与9号煤层之间顶板厚度较薄且分布不均匀、顶板破碎程度大的情况,分析了开切眼直接顶板的稳定性,得出顶板破坏的原因和条件,并结合现场工程条件提出了顶板加固技术和相应的注浆加固参数。现场应用结果表明,顶板加固效果较好,没有出现恶性冒顶事故。

For the case where the thickness of the roof between the No.10 coal seam and the No.9 coal seam of Fenyuan Coal Industry Co., Ltd. of Huozhou Coal Electricity Group is thin, uneven and broken, this paper analyzed the stability of the direct roof of open cut, obtained the reasons and conditions for the roof damage and proposed the roof reinforcement technology and the corresponding grouting reinforcement parameters in combination with the site engineering conditions. The field application results show that the roof reinforcement effect is better and there is no malignant roof accident.