维普中文期刊产品整合服务

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

查看全文 作　　者：Deyong [1]Guo;Pengfei [2]Lv;Jiechao [1]Zhao;Chao [1]Zhang 高影响力作者 机构地区：[1]School of Emergency Management and Safety Engineering,China University of Mining and Technology,Beijing,Beijing,100083,China;[2]Safety Engineering College,Beijing Institute of Petrochemical Technology,Beijing,102617,China高影响力机构 出　　处：《International Journal of Coal Science & Technology》索引2020年第7卷第2期,共8页高影响力期刊 基　　金：The project was supported by the National Science Foundation of China(41430640,U1704242). 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. 关 键 词：Cumulative blasting Fracturing mechanism Coalbed permeability improvement Permeability improvement technology Gas extraction
相关文献

参考文献(44)

引证文献(7)

耦合文献(922)

网站首页 | 关于我们 | 联系我们 | 产品服务 | 客服中心 | 广告服务 | 版权声明 | 网站联盟 | 友情链接 | 售卡网点

版权所有© 渝B2-20050021-1　渝公网安备 50019002500403号　违法和不良信息举报中心

互联网出版许可证 新出网证(渝)字10号 全国400电话 - 免长途话费