墩柱式沿空留巷方法在软弱顶板煤层中的应用  

Application of Pier Column Gob-side Entry Retaining Roadway in Weak Roof Coal Seam

作　　者：朱怀志[1] 王苗 徐朋伟 黄成军[1] 

机构地区：[1]滕州市金达煤炭有限责任公司,山东滕州277500 [2]青岛市黄岛区安全生产监管执法局,山东青岛266500

出　　处：《煤矿安全》2017年第11期159-162,共4页Safety in Coal Mines

摘　　要：为提高东大煤矿薄煤层软弱顶板条件下煤层回采率,延长采区开采时间,从理论和数值模拟角度论证了墩柱式沿空留巷技术在该矿井应用的可行性,分析了留巷期间巷道垂直应力分布特征,水平及垂直位移变化特点。工程实践表明,墩柱能够提供较大的支护阻力,可以有效切断巷道顶板应力传递途径,减小巷道压力,提高煤炭资源回收利用率,为薄煤层开采设计提供工程实例。In order to improve the recovery rate of coal seam in the thin roof of Dongda Coal Mine and extend the mining time of the mining area, the feasibility of the application of pier column gob-side entry retaining technology in the mine is demonstrated from the theoretical and numerical simulation. During the period of gob-side entry retaining, vertical stress distribution characteristics, horizontal and vertical displacement characteristics are analyzed. The engineering practice shows that the pier can provide a large support resistance, which can effectively cut off the roadway stress transmission path, reduce the roadway pressure,improve the utilization rate of coal resources, and provide the engineering examples for the thin coal seam mining design.

关 键 词：软弱顶板 沿空留巷 墩柱切顶 数值模拟 巷旁支护 

分 类 号：TD322.3[矿业工程—矿井建设]