• 主题
高级搜索  >
历史搜索 清空历史
首页> 外文期刊>RSC Advances >The dual deformation and remodeling of coal powders: implications for obtaining reliable stress-formed coal samples
【24h】

The dual deformation and remodeling of coal powders: implications for obtaining reliable stress-formed coal samples

机译：煤粉的双重变形和重塑：获得可靠的应力形成煤样品的意义

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

摘要

The preparation of suitable specimens is important for obtaining credible mechanical and methane migration parameters for tectonic coal, which help to guide methane extraction and disaster prevention. In this study, a dual-deformation mechanism for porous media was introduced along with two powder compression models, and the issues that should be considered in the preparation of coal specimens were analyzed. By compression tests, the relationship between bed relative density and the applied stress in the compression of coal particles was obtained. The method of coal specimen preparation was introduced in detail. The results indicated that the Kawakita model is suitable for describing the compressive process of tectonic coal powders and guiding the preparation of tectonic coal specimens. The key parameters a and b in the Kawakita model are 0.411 and 0.108, respectively. The bed relative density shows a slight increasing trend followed by an obvious rising tendency with an increase in the applied stress. A compressive stress of 150 MPa was determined to be suitable for preparation of the tested coal specimens.
机译：准备合适的标本对于获得构造煤的可靠的机械和甲烷运移参数非常重要，这有助于指导甲烷的提取和防灾工作。在这项研究中，介绍了多孔介质的双重变形机制以及两个粉末压缩模型，并分析了煤样品制备中应考虑的问题。通过压缩试验，获得了煤层压缩中床层相对密度与外加应力之间的关系。详细介绍了煤标本的制备方法。结果表明，Kawakita模型适用于描述构造煤粉的压缩过程，并指导构造煤样品的制备。川北模型中的关键参数a和b分别为0.411和0.108。床的相对密度显示出轻微的增加趋势，随后随着施加应力的增加而出现明显的上升趋势。确定150 MPa的压应力适合于制备受试煤样品。

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