厚松散层薄基岩特厚煤层综放开采防塌煤柱研究

Research on Anti-collapse Pillar of Fully-mechanized Top Coal Caving in Extremely Thick Coal Seam with Thick Loose Bed and Thin Overlying Strata

通过对厚松散层、薄基岩覆岩及其矿井水文地质特征的分析,采用相似模拟实验与数值模拟等手段研究了特厚煤层综放开采防塌煤柱的留设。研究结果表明,基岩风氧化带具有再生隔水能力,能有效抑制冒落带的发育高度,留设最大防塌煤岩柱的高度为16.9 m时,可以进行安全高效开采。

Through the analysis on thick loose layer and thin bedrock strata and the hydrogeological characteristic of the coal mine,anti-collapse pillar was studied by using the methods of the similarity simulation experiment and numerical simulation. Research results show that, wind oxidized zone of bedrock has the capacity of regenerated water, can restrain the development height of caving zone effectively. Mining can be carried out safely and efficiently when the height of maximum anti-collapse pillar is 16.9 m.