千米深井复杂运输条件特厚煤层综放支架设计及参数优化

Design and Parameters Optimization of Full-mechanized Top-coal Caving Powered Support for Extremely-thick Coal-seam under Complex Transportation Condition in 1000m Deep Mine

为满足3号特厚煤层千米以上埋深、顶板控制要求和复杂运输条件,对不同采煤方法适应性和支架参数进行研究。研究结果表明：特厚煤层综放开采在回采率、成本控制、安全保障和设备配套等方面较分层和大采高综采具有较大优势,千米埋深特厚煤层所需支护强度为1．3~1．4MPa,支架设计？300/220mm较大缸径立柱和1500mm较小中心距解决罐笼小尺寸运输和强力支护重型大设备之间的矛盾,采用铰接顶梁加强架前支护和方便运输,优化立柱布置保证足够的行人和操作空间,设置防倒防滑、双侧活动侧护板和抬底机构增强对较大倾角和较软底板的适应性。

In order to meet 1000m deep depth, roof controlling requirement and complex transportation condition of No. 3 extremely-thick coalseam, adaptability of different mining methods and powered support＇s parameters were researched. Results showed that full-mechanized top-coal caving mining had larger advantage in mining ratio, cost control, safety assurance and equipments matching, compared with slicing mining and large-mining-height full-mechanized mining method. For extremely-thick coalseam in 1000m deep mine, 1. 3-1. 4MPa supporting intensity, 300/220 cylinder diameter and 1500mm center distance was designed to solve the conflict of small size cage and large equipment. Articulated roof beam was applied to strengthening supporting and facilitating transportation. Prop arrangement was optimized to ensure enough pedestrian and operation space. Anti-slide and anti-dumping structure, side-guard plate and bottom-lift device was designed to strengthen adaptability for large inclined angle and soft floor.