五家沟矿5201综放工作面矿压规律研究

Study on Strata Behavior Regularity of 5201 Fully Mechanized Caving Face in Wujiagou Coal Mine

参考并修正现场煤岩力学性质参数,通过UDEC数值模拟分析五家沟矿5201综放工作面推进过程中煤层覆岩裂隙发育特征、垂直应力和位移的分布及变化规律,并对采场老顶初次垮落步距、周期来压步距等参数进行确定。工作面回采期间支架循环末阻力呈正态分布,支架受力状态较为理想,支架初撑力小于其额定初撑力,前后立柱受力比较均匀。

Referring and correcting mechanical parameters of coal and rock in numerical simulation by UDEC was applied to analyze fractures＇ development features in overburden, distribution and changing laws of stress and displacement with 5201 fully mechanized caving face advancing in Wujiagou coal mine. Besides, the distance of basic roof first collapse and average interval of basic roof periodic weighting were obtained approximately. Working resistance of supports distribute ideally relatively;setting load of hydraulic support is less than the rated setting load and the force condition of anterior column and posterior column for support are uniform relatively.