关键词: 切顶卸压留巷, 施工工序, 矿压显现规律, 顶板控制

Abstract: Based on production practice of 12201 working face of Ha Lagou coal mine Shendong mine area, pressure regularity and roof control measures were analyzed of gob-side entry retaining formed by roof cutting and pressure relief face. The results show that during the first mining, pressure intensity is relatively weak beside the left lane. When the pushed distance is 100 meters, the roadway is basically stable and the support can be retreated. The surrounding roadway rock of 12201 is controlled effectively by adding support strength, protecting roof anchor integrity and reinforcing glass bolt support. During the second mining, pressure intensity beside left lane is obviously larger than that of the other regions and there is serious hanging roof. The problem of hanging roof is solved and pressure intensity are weakened by taking retreating anchor and forced caving the roof. The influence range of lead pressure in left lane in not more than 25 meters and the peak position is about 10 meters. The support scheme of left lane by taking DW28-400/110 and DW25-400/110 type single support, single row spacing 0.6m, each row 6, advance support distance 30 meters is reasonable. From pressure control of the roadway and work face, the technology has been matured, but the ventilation management needs to be further summarized and verified.