TY -的A2温Zhijie AU -杨,“非盟-赖,Xingping盟——山,Pengfei AU -崔,冯AU -杨,Yiran PY - 2020 DA - 2020/09/01 TI -研究综放的特点和优化的采收率急倾斜残余煤柱高截面SP - 8883784六世- 2020 AB -本文旨在解决技术问题,如低采收率和频繁的灾害在急倾斜和extrathick煤层残余煤柱高分段。需要Wudong煤矿为工程背景,一个典型的矿急倾斜和extrathick煤层;的结构特点在急倾斜综放残余煤柱高截面进行了分析使用方法现场监测和数值模拟等;顶煤拱结构的力学模型,和综放高度的计算方法和相关的影响因素。结果表明,在急倾斜综放残余煤柱高截面特征是拱门。由于拱结构的存在,光滑屈服的煤是阻碍,导致较低的顶煤回收比率,在工作面支承压力低,差异探测到钻孔电视顶煤裂缝的分布。进步的工作面,顶煤拱结构在动态演化的过程中,由于旧的拱的平衡系统不断被新的拱的平衡系统,它不断走向上层煤。综放高度等因素影响工作面长度,上覆煤岩的体积密度,凝聚力的煤炭。综放高度与工作面长度的增加上覆煤岩体的体积密度,但成反比的凝聚力上煤。在当前的开采条件下,综放高度是39.8米,这是远低于残余煤柱高截面高度(71); the top coal cannot collapse completely. Based on the characteristics of the top-coal caving structure, the technology of sublevel advanced presplitting blasting was adopted to weaken the top coal in engineering practice, so that the top-coal caving structure moved up naturally. The daily coal production in the working face has increased by an average of 2419.6 tons, which has significantly improved the top-coal recovery ratio and production efficiency. The result provided a theoretical basis and application reference for similar residual high sectional coal pillar recovery. SN - 1468-8115 UR - https://doi.org/10.1155/2020/8883784 DO - 10.1155/2020/8883784 JF - Geofluids PB - Hindawi KW - ER -