TY - JOUR A2 - miao, chen AU - Jiulin, Shi AU - Shaohong, Yan AU - Zhuhe, Xu AU - Jisheng, Xue AU - Zhao, Kaikai AU - Jianwei, Zheng PY - 2021 DA - 2021/01/19 TI - Analysis of the Progressively Enhanced Mine Pressure in the Fully Mechanized Top Coal Caving Work Face of a 20 m Ultra-Thick Coal Seam SP - 6678207 VL - 2021 AB - Considering the large mined area, wide strata moving range, strong mine pressure occurrence, and difficult roof control for the fully mechanized top coal caving in 20 m ultra-thick coal seams, this study analyzes the strata structure evolution and mine pressure occurrence behavior through field test, numerical simulation, and theoretical analysis.基于台东矿区Tashan煤矿矿条件,为院落覆盖结构搭建机械模型从这项研究中可以证明:(1)硬层可组成三种不同的复合空间结构,分布在覆盖岩层的不同位置上,包括低组合罐头结构I、中间组合罐头结构II和上链结构上层结构失效可诱导下层结构压缩,改变下层结构断段复合空间结构“同时非同时故障”是由多层结构间断度变化引起的(4) 基于权重特征,工作面部权重分三大阶段,包括逐步加压阶段(StageI)、加速加压阶段(StageII)和快速加压阶段(StageIII)。(5) 矿压复发展示出小中型大特征(6) 预分解技术应额外整合以防止多层结构同时失效工作发现可显示大通矿区出现强矿压,并具有理论意义和参考值以维护类似条件的安全采掘SN-1070-9622UR-https://doi.org/101155/20216678207DO-10.1155/20216678207JF-震荡和振荡PB-HindawiKW-ER-