• 主题
高级搜索  >
历史搜索 清空历史
首页> 外文会议>The 2008 International Symposium on Safety Science and Technology(2008年安全科学技术国际会议)论文集 >Fracture Mechanics Analysis on Composite Macro-Cracks Extension in Coal Seam Pre-splitting Blasting
【24h】

Fracture Mechanics Analysis on Composite Macro-Cracks Extension in Coal Seam Pre-splitting Blasting

机译：煤层预裂爆破中复合宏观裂纹扩展的断裂力学分析

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

摘要

During Pre-splitting Blasting in coal seam, the macro-cracks coming from blasting shock wave are composite ones in fact, however, for most oftbe fundamental researches, attention was concentrated on simplex mode-! fracture and the influence of methane pressure was ignored. According to fracture mechanics theories, this paper analyzed detailedly the characteristics of stress field and intensity factors ahead of crack tip, and educed extension directions, fracture roles and extension length of the macro-cracks by most-shear stress principle. Taking account of practice application in spot, maximal length and minimal length were working-out. Such a study will be significant not only for perfecting more the theory of pre-splitting blasting in coal seam but also for serving practice application.
机译：实际上，在煤层的预裂爆破过程中，爆破冲击波产生的宏观裂纹实际上是复合裂纹，但是，在大多数基础研究中，注意力都集中在单纯形模式上！裂缝和甲烷压力的影响被忽略。根据断裂力学理论，详细分析了裂纹尖端前的应力场和强度因子的特征，并根据最大剪切应力原理得出了宏观裂纹的延伸方向，断裂作用和延伸长度。考虑到现场实际应用，确定了最大长度和最小长度。这样的研究不仅对完善煤层预裂爆破理论具有重要意义，而且对实际应用具有重要意义。

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