旧街煤业9202工作面开切眼支护措施分析

Analysis of support measures for open-off cut of 9202 working face in Jiujie mine

针对近距离煤层下组煤工作面开切眼矿压显现显著这一问题,以旧街煤业9202工作面开切眼作为研究对象,在掘进过程中提出了一次成巷支护、注浆、支护参数调整、二次成巷及高冒区处理等巷道支护措施。结果表明,该支护措施行之有效,保证了开切眼巷道宽度7 m,高度2.8 m的断面,为工作面设备的敷设提供了保障。该措施对类似条件的矿井具有借鉴意义。

In view of the problem that the strata pressure of the open-off cut in the working face under the lower coal of the contiguous seams,the studied object was the open-off cut of 9202 working face in Jiujie mine.The supporting measures of primary roadway,grouting,adjustment of support parameters,secondary roadway and treatment of high-risk area were putted forward.The result is the supporting measures are effective.The section with width of 7 m and height of 2.8 m is ensured.It provides guarantee for the laying of working face equipment.The measure can be used for reference in mines with similar conditions.