...
  • 主题
高级搜索  >
历史搜索 清空历史
首页> 外文期刊>Journal of Residuals Science & Technology >Deep Coal Mine Methane Drainage in China with Lower Greenhouse Gas Emissions: Insights of Borehole Protection Technology
【24h】

Deep Coal Mine Methane Drainage in China with Lower Greenhouse Gas Emissions: Insights of Borehole Protection Technology

机译：温室气体排放低的中国深层煤矿瓦斯排放：井眼保护技术的见解

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

摘要

Climate warming has currently been one of the most important global environmental issues. Coal mine methane (CMM) is a typical greenhouse gas with higher global warming potential and ozone depletion potential than CO2. Unfortunately, it should be noted that the CMM emission increases rapidly with the increasing coal consumption in China. Fast and whole protection technology of borehole is a recently developed method to maintain the drainage efficiency in deep mining level. However, the potential negative impact of screen pipes on CMM drainage efficiency has not been well studied. To investigate this impact, an innovative coal permeability model from elastic to post-failure state was deduced to develop our previous gas migration model. Then redistributed stress, coal permeability and gas pressure around a borehole were studied by implementing the mathematical model into Comsol Multiphysics. Numerical results indicate that the negative impact of screen pipes on drainage subpressure do not affect the drainage efficiency due to the stress redistribution. Engineering application shows that comparing to the traditional borehole protection technology, the gas concentration increases about 120% and the gas flux increases about 110% by using the fast and whole protection technology. The research will provide theoretical foundation of CMM capture and borehole protect technology and is of great significance for the CMM utilization and the global environment.
机译：当前，气候变暖是全球最重要的环境问题之一。煤矿瓦斯（CMM）是一种典型的温室气体，具有比CO2高的全球变暖潜能和臭氧消耗潜能。不幸的是，应该指出的是，随着中国煤炭消费量的增加，煤矿瓦斯的排放量迅速增加。快速，全面的井眼保护技术是最近在深部开采中保持排水效率的一种新方法。但是，尚未充分研究筛管对CMM排水效率的潜在负面影响。为了研究这种影响，推导了从弹性状态到破坏后状态的创新煤渗透性模型，以发展我们以前的天然气运移模型。然后，通过将数学模型应用于Comsol Multiphysics中，研究了井眼周围的重新分布应力，煤渗透率和气压。数值结果表明，由于应力的重新分布，筛管对排水负压的负面影响不会影响排水效率。工程应用表明，与传统的井眼保护技术相比，采用快速，全面的保护技术，瓦斯浓度提高了约120％，气流量提高了约110％。该研究将为煤矿瓦斯抽采和井下保护技术提供理论基础，对于煤矿瓦斯的利用和全球环境具有重要意义。

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