Analysis of Abnormal Gas in Gas Weathered Zone of Ningdong Mining Area
详细信息
- 责任者：Zhao Jizhan (Xi’an Research Institute ; China Coal Technology and Engineering Group Corp. ; Xi’an 710054 ; China) ; Chen Zhisheng
- 刊名：Coal Geology & Exploration
- 出版年：2013
- 卷期：41(4)
- 关键词：煤层 ; coal seam ; 煤和瓦斯突出 ; coal and gas outburst ; 鄂尔多斯地台 ; Ordos Platform
- 页码：p.14-17
- 图表：illus., 5 tables, 13 refs.
- 分类号：1004
- issnNo：ISSN1001-1986
- isbnNo：CN61-1155/P
摘要
During mining in gas weathered zone,the gas is not a major threat to production.But in this research,the high concentration of methane gas is found from the geological inspection drilling in the gas weathered zone for colliery construction.Through regional geological analysis and the geology exploration,it is found that in the initial district in arched structure zone,there is free gas accumulation in sandstone in roof due to the influence of geological structure.Through targeted gas drainage by boreholes,nearly 200 million m3 of pure gas were drained during 3 months.The study results indicated that there may exist an area with high gas concentration in gas weathered zone with closure conditions.
© 2004-2018 中国地质图书馆版权所有 京ICP备05064691号 京公网安备11010802017129号 地址：北京市海淀区学院路29号 邮编：100083 电话：办公室：(+86 10)66554848；文献借阅、咨询服务、科技查新：66554700 |