急倾斜厚煤层综放工作面矿压规律数值模拟研究

急倾斜厚煤层采用综放开采时,其巷道布置形式有错层位和同层位两种,两者工作面的矿压显现规律、顶煤冒放性和回采巷道矿压显现差异较大。通过UDEC4.0数值模拟分析了错层位布置和同层位布置时首采和下临近工作面的两侧支承压力分布规律、上覆顶煤岩运移规律和回采巷道顶板冒落规律,研究结果表明,首采工作面错层位顶煤冒放性优于同层位,但前者下部支承压力大于后者;错层位首采面回风巷和运输巷压力大,巷道维护困难,而下临近工作面上顺槽矿山压力小,有利于巷道的维护。

Steeply Inclined Thick Coal Seam Fully-Mechanized Caving Mine Pressure Regularity Numerical Simulation Research

When steeplyinclined thick coal seam was taken byusing the fully- mechanized mining, there were mix horizon and same horizon, two types of roadway layout, the two way working face of law of mine pressure appearance, top- coal caving and roadway, mine pressure appearance were quite different. Through UDEC4.0 numerical simulation analyzing mix horizon and same horizon under the initial mining and abutment pressure distribution law on both sides near the working face, overlying top- coal movement rule and rule of roadway roof caving mining, the results proved that the first mining face mix horizon top coal caving was superior to same horizon, but, the former lower bearing pressure was larger than the latter; mix horizon the first mining face roadway pressure was big, with hard maintenance of roadway, whereas, the near work along the groove on the surface of the mine pressure was small, which is in favor of roadway maintenance.