门克庆矿综采工作面区段煤柱合理尺寸研究 The Study of Reasonable Section Coal Pillar Size of Men Keqing Mechanized Longwall Mining Face

随着浅部煤炭资源的日益枯竭，开采活动逐渐转入深部，鉴于安全高效生产和资源回收的原则，区段煤柱留设的合理宽度变得尤为重要。本文以门克庆矿31201工作面区段煤柱留设为工程背景，利用载荷估算法和塑性理论进行了煤柱宽度的初步计算，分别得出煤柱宽度为36.03 m和18.59 m。并利用数值模拟计算的方法分别对15 m、25 m、35 m、40 m煤柱宽度条件下，回采巷道在一次采动影响下的塑性区和支承压力分布情况进行了研究，结果显示，煤柱宽度为35 m、40 m时，巷道的塑性区破坏最小，综合分析认为，区段煤柱的合理尺寸应为35~40 m。 With the shallow coal resources exploitation exhausts, coal mining gradually changes into the deep mining. In view of the principle of safe and efficient production and resource recovery, the reasonable width of section coal pillar has become more important. On the engineering background of coal pillars of 31201 working face of Menkeqing Mine, by using load estimation method and plastic theory, the paper calculates the pillar width and obtains that the coal pillar widths are 36.03 m and 18.59. By using the method of theoretical calculation and numerical simulation, the plastic zones of roadway affected by the one-time mining and its abutment pressure distribution in the condition of 15 m, 25 m, 35 m and 40 m coal pillar widths are studied. The results show that the roadway has minimal damage when coal pillar widths are 35 m and 40 m. The reasonable size of the section coal pillar should be 35 - 40 m.