沿空留巷爆破切顶及煤体注浆加固技术

Blasting Roof Cutting and Coal Grouting Reinforcement Technology for Gob Side Entry Retaining

为解决沿空留巷巷道变形问题,减小巷道维护量,提高煤炭回收率,采取中深孔聚能爆破切顶及煤体注浆加固的综合治理方法,采用"十"字布点法对巷道的变形情况进行监测。结果表明:留巷巷道顶板下沉量和两帮收缩量均显著减小,保证了围岩的整体完整性,能够较好地控制住围岩变形,具有较高的应用价值。

In order to solve the deformation problem of gob side entry retaining roadway,reduce the amount of roadway maintenance and improve the coal recovery rate,the comprehensive treatment method of medium deep hole shaped blasting roof cutting and coal grouting reinforcement is adopted,and the"+"shaped point method is used to monitor the deformation of the roadway.The results show that the roof subsidence and two side shrinkage of the retained roadway are significantly reduced,which ensures the overall integrity of the surrounding rock and can better control the deformation of the surrounding rock,which has high application value.