...
  • 主题
高级搜索  >
历史搜索 清空历史
首页> 外文期刊>Shock and vibration >Analysis of the Progressively Enhanced Mine Pressure in the Fully Mechanized Top Coal Caving Work Face of a 20?m Ultra-Thick Coal Seam
【24h】

Analysis of the Progressively Enhanced Mine Pressure in the Fully Mechanized Top Coal Caving Work Face of a 20?m Ultra-Thick Coal Seam

机译：20μm超厚煤层综合机械化顶部煤塌方工作面逐步增强矿压的分析

获取原文
           
页面导航
  • 摘要
  • 著录项
  • 相似文献
  • 相关主题

摘要

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. Based on the mine condition of the Tashan Coal Mine in the Datong mining area, mechanical models are established for the compound overlying structures. The following can be demonstrated from this study: (1) The hard strata can form three different compound spatial structures at different positions in the overlying rock strata, including the lower combined cantilever structure I, the middle combined cantilever structure II, and the upper hinged structure. (2) Failure of the higher structure can induce compression on the lower structure, which changed the break span of the lower structure. (3) “Simultaneous and nonsimultaneous structural failures” of the compound spatial structure were caused by the variation of the break span of the multilayered structure. (4) Based on the weighting characteristics, there were three stages during work face weighting, including a gradual pressure increase stage (Stage I), an accelerated pressure increase stage (Stage II), and a fast pressure increase stage (Stage III). (5) The mine pressure occurrence demonstrated a “small to medium and to large” feature. (6) Prefracturing techniques should be additionally incorporated to prevent simultaneous failure of the multilayered structure. Findings of the work can demonstrate the emergence of strong mine pressure in the Datong mining area and have theoretical significance and reference value for maintaining safe mining in similar conditions.
机译：考虑到大型开采面积，宽地层移动范围，强矿压力发生，综合机械化顶煤煤堵塞件综合屋顶控制，这项研究分析了地层结构进化和矿井压力发生行为现场测试，数值模拟和理论分析。基于大同矿区中塔山煤矿的排雷，为复合结构建立了机械模型。从该研究中可以证明以下内容：（1）硬层可以在覆盖岩层中的不同位置形成三个不同的复合空间结构，包括下组合的悬臂结构I，中间组合的悬臂结构II和上铰链结构体。 （2）较高结构的失效可以诱导较低结构上的压缩，改变了下部结构的断裂跨度。 （3）复合空间结构的“同时和无情和无情的结构故障”是由多层结构的断裂跨度的变化引起的。 （4）基于加权特性，在工作面加权期间存在三个阶段，包括逐渐增加阶段（阶段I），加速压力增加阶段（阶段II）和快速增加阶段（第III阶段）。 （5）矿井压力发生展示了一个“小于中等和大的”特征。 （6）应另外掺入前表面处理以防止多层结构的同时失效。工作调查结果可以证明大同矿区强力矿井压力的出现，并具有理论意义和参考价值，以维持在类似条件下的安全采矿。

著录项

相似文献

  • 外文文献
  • 中文文献
  • 专利
获取原文

客服邮箱：kefu@zhangqiaokeyan.com

京公网安备：11010802029741号 ICP备案号：京ICP备15016152号-6 六维联合信息科技 (北京) 有限公司©版权所有

  • 客服微信

  • 服务号