...
  • 主题
高级搜索  >
历史搜索 清空历史
首页> 外文期刊>Advances in civil engineering >Study on the Instability Characteristics and Bolt Support in Deep Mining Roadways Based on the Surrounding Rock Stability Index: Example of Pansan Coal Mine
【24h】

Study on the Instability Characteristics and Bolt Support in Deep Mining Roadways Based on the Surrounding Rock Stability Index: Example of Pansan Coal Mine

机译：基于周围岩石稳定性指数的深层采矿路径中不稳定特性和螺栓支护研究：潘南煤矿示例

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

摘要

In view of the influence of mining stress on the stability of the surrounding rock of inclined roof mining roadways in deep mines, the surrounding rock stability index is defined and solved based on the rock strength criterion and the stress distribution. The mining roadway of the 17102(3) working face of the Pansan Coal Mine is used as the engineering background and example. The surrounding rock’ stabilities under the conditions of no support and bolt support are analyzed according to the surrounding rock’s stability index and the deformation data. The results show that the areas of low wall and high wall instability are 1.68?m2 and 2.12?m2, respectively, and the low wall is more stable than the high wall; the areas of the roof and floor instability are 0.33?m2 and 0.35?m2, respectively, and the roof and floor are more stable than the two sides. During mining, the area of instability greatly increases at first, then decreases to 0, and reaches a maximum value at the peak of the abutment pressure. The stability of the surrounding rock decreases first and then increases. Compared with the end anchoring bolt support, the full-length anchoring bolt support reduces the area of instability to a greater extent, and the full-length anchoring bolt support effect is better. The surrounding rock in the end anchoring zone and the full-length anchoring zone began to deform significantly at 200?m and 150?m from the working face, respectively. This indicates that the control effect of the full-length anchoring bolt support is better and verifies the rationality of the surrounding rock stability index to describe the instability characteristics. This research method can provide a theoretical reference for analysis of the stability characteristics and support design of different cross-section roadways.
机译：鉴于采矿应力对深矿井倾斜屋顶挖掘道路周围岩石稳定性的影响，基于岩石强度标准和应力分布来定义和解决周围岩石稳定性指标。粉末煤矿的17102（3）（3）个工作面的采矿道路用作工程背景和示例。根据周围的岩石的稳定性指数和变形数据，分析周围的岩石'在无支撑和螺栓支撑条件下的稳定性。结果表明，低壁和高壁不稳定性的区域分别为1.68？M2和2.12？M2，低壁比高壁更稳定;屋顶和地板不稳定性的区域分别为0.33？M2和0.35？M2，屋顶和地板比两侧更稳定。在挖掘期间，不稳定区域首先大大增加，然后减少到0，并在邻接压力的峰值处达到最大值。周围岩石的稳定性首先减少，然后增加。与端部锚固螺栓支撑相比，全长锚固螺栓支撑在更大程度上减小不稳定性区域，并且全长锚固螺栓支撑效果更好。端部锚固区和全长锚固区的周围岩石分别从工作面的200μm和150Ωm显着变形。这表明全长锚固螺栓支撑件的控制效果更好并验证周围岩石稳定性指数的合理性以描述不稳定性特性。该研究方法可以为分析不同横截面道路的稳定性特性和支持设计提供理论参考。

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