...
  • 主题
高级搜索  >
历史搜索 清空历史
首页> 外文期刊>International Journal of Coal Science & Technology >Research progress on permeability improvement mechanisms and technologies of coalbed deep-hole cumulative blasting
【24h】

Research progress on permeability improvement mechanisms and technologies of coalbed deep-hole cumulative blasting

机译：煤层气累积爆破渗透性改进机制与技术研究进展

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

摘要

Coalbed gas extraction is an important means of exploiting and utilizing gas resources, as well as a means of preventing coal mine disasters. In view of the low gas extraction rate from coalbeds with high gas content and low permeability, a method of improving permeability through deep-hole cumulative blasting is applied to develop initial directional fractures using a jet flow. Under the action of the blasting stress wave and detonation gas wedge, the fractures extend over a large range within the coal, thereby improving coalbed permeability. This study focuses on the criteria of cumulative blasting-induced coalbed fracturing based on a literature review of the penetration effect of cumulative blasting. On this basis, we summarize the coal fracturing zone, crack extension process, and the key technologies of charging and hole sealing for cumulative blasting. In addition, the latest research progress in the optimization of field test drilling and blasting parameters for cumulative blasting is introduced. Research findings indicate that the permeability improvement mechanism of cumulative blasting could be further enhanced, and the technology and technical equipment are in urgent need of improvement. Finally, development trends in the cumulative blasting permeability improvement technique are identified.
机译：煤层气提取是利用和利用天然气资源的重要手段，以及防止煤矿灾害的手段。鉴于具有高气体含量和低渗透率的煤层的低气体提取率，通过深孔累积爆破改善渗透性的方法，应用使用喷射流动的初始定向骨折。在爆破应力波和爆炸气体楔的作用下，裂缝在煤内的大范围内延伸，从而提高了煤层气。本研究侧重于基于累积爆破渗透效应的文献综述累积爆破诱导煤层压裂标准。在此基础上，我们总结了煤压裂区，裂缝延伸过程，以及用于累积爆破的充电和孔密封的关键技术。此外，介绍了累计爆破的现场测试钻井和爆破参数优化的最新研究进展。研究结果表明，可以进一步提高累积爆破的渗透性改善机制，技术和技术设备迫切需要改进。最后，确定了累积爆破渗透性改善技术的发展趋势。

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