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为揭示上层残留煤柱下综放沿空回采巷道矿压显现规律,有效控制围岩变形,根据阳泉一矿8902综放面地质与开采条件,结合现场沿空回采巷道矿压观测结果,应用FLAC3D数值模拟计算分析回采巷道塑性区发育及应力分布情况.研究表明,综放回采巷道在上层残留煤柱影响与本层煤回采引起的应力重新分布耦合作用下,回风巷两帮及顶底移近量高达1985,1877mm,局部断面不足2m2,严重制约了工作面安全高效生产,采取合理布置回采巷道及减小区段煤柱宽度等措施可有效维护巷道.
In order to reveal the regularity of underground pressure in underground mining gateway under the upper residual coal pillar and effectively control the deformation of surrounding rock, according to the geology and mining conditions of No.8902 fully mechanized caving mining face in Yangquan No.1 Mine, Numerical simulation analysis of plastic zone development and stress distribution in mining gateway shows that the effect of residual coal pillar in upper fully-mechanized caving mining roadway and the stress redistribution caused by coal mining in this layer, As close to the amount of up to 1985,1877mm, partial cross-section of less than 2m2, a serious constraint on the safe and efficient production of face, to take reasonable layout of the mining roadway and reduce the width of pillars and other measures can effectively safeguard the roadway.