特厚煤层孤岛综放工作面沿空护巷煤柱宽度及控制技术研究

为了提高特厚煤层孤岛综放工作面沿空护巷煤柱及巷道围岩稳定性，以唐家会煤矿61102特厚煤层孤岛综放工作面为研究对象，采用理论分析、数值模拟与现场实测相结合的研究方法，对特厚煤层孤岛综放工作面沿空护巷煤柱合理尺寸及巷道支护方式进行了研究，结果表明：采用应力极限平衡理论和内应力场分布规律，以及有限元法对比不同煤柱宽度的塑性区及应力分布特征，确定出孤岛综放工作面沿空护巷煤柱宽度为21 m；采用锚网索+钢筋梯子梁+钢带的联合支护方式，可以有效减小沿空巷道围岩移近量，显著提高沿空巷道围岩的整体稳定性。研究结果可为类似地质生产条件下的矿井提供参考依据。

Study on Coal Pillar Width and Control Technology on Gob-side Roadway of Isolated Fully Mechanized Working Face in Ultra-thick Coal Seam

In order to improve the stability of coal pillar and surrounding rock on gob-side roadway in isolated fully mechanized working face of ultra-thick coal seam, taking the isolated fully mechanized working face of 61102 ultra-thick coal seam in Tangjiahui Coal Mine as the background, by means of theoretical analysis, numerical simulation and field measurement, the reasonable size of coal pillar and roadway support method on gob-side roadway were studied in the isolated fully mechanized working face of ultra-thick coal seam. The results show that by using the stress limit equilibrium theory, the distribution law of internal stress field and finite element method to compare the plastic zone and stress distribution characteristics of different coal pillar widths, it is concluded that the width of coal pillar on gob-side roadway in the isolated fully mechanized working face is 21 m; the combined support method of