厚煤层综放开采沿空留巷技术研究

Research on the Technology of the Gob Side Entry Retaining of Fully Mechanized Caving Mining in Thick Coal Seam

为提高厚煤层开采煤炭资源回收率,减少巷道掘进量,本文以晋煤集团某矿4311综放工作面为工程背景,通过充填体支护阻力计算得出合理充填体宽度为2 m,据此确定了充填材料的最佳水灰比,并提出了巷旁充填施工工艺。现场工业性试验表明,该技术条件下的沿空留巷巷道维护效果良好,能较好地满足煤矿安全生产要求。

In order to improve the recovery rate of coal resource in thick coal seam mining and reduce the amount of roadway driving, in this paper, under the engineering background of the 4311 fully mechanized coal mining group of a mine, Shanxi Coal Group, through the calculation of the filling body, the reasonable filling width was 2 m, the optimal water cement ratio of the filling material was determined, and then the construction technology of the filling of roadside packing was put forward. Field industrial test shows, under the condition of the technology, that the maintenance effect of the roadway of gob side entry retaining is good. Therefore, it can achieve the coal mine safety production requirements better.