“两硬”围岩薄煤层工作面矿压显现规律研究

Study of “Two hard” Country Rock Thin Seam Mining Face Pressure Behavior Law

针对寺河煤矿二号井IX4306"两硬"围岩(坚硬顶板和坚硬底板)薄煤层综采工作面的地质条件,结合该工作面矿压现场监测数据,应用数值模拟的方法,对IX4306薄煤层工作面矿压显现规律进行了分析研究。研究结果表明:寺河煤矿二号井IX4306薄煤层工作面基本顶初次来压步距为26.8 m,周期来压步距平均为17.8 m,动载系数普遍较小;超前支承压力峰值位置位于煤壁前方1~5 m处,来压强度较低,为类似条件工作面的安全高效回采提供了参考和指导。

Contrary to Sihe 2nd Mine IX4306 'two hard' country rock(hard roof and hard floor) thin seam mining face geological conditions, combined with the mining face pressure field monitoring data,the application of numerical simulation methods, thin IX4306 coal mining face pressure behavior law were analyzed. The results show that Sihe 2nd mine IX4306 thin coal seam face basic roof initial pressure in steps of 26.8 m, periodic weighting from an average of 17.8 m, dynamic load factor is generally small; abutment pressure peak position is located in the coal at the wall in front of 1~5 m to pressure lower intensity, face similar conditions to the safe and efficient mining provides reference and guidance.