• 主题
高级搜索  >
历史搜索 清空历史
首页> 外文期刊>Energy Science & Engineering >Test and study on transfusion law of gas in mining coal
【24h】

Test and study on transfusion law of gas in mining coal

机译：煤矿瓦斯涌出规律的试验研究

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

摘要

In this paper, the seepage tests of mining coal were conducted by servo‐controlled seepage apparatus. These tests consist of conventional triaxial compression seepage tests, and load and unload seepage tests. It was observed that the peak strength and corresponding axial strain of raw coal samples gradually increase with the increase of confining pressure, which conforms to the Mogi‐Coulomb strength criterion, and the internal friction angle was calculated as φ ?=?42.65°, and the cohesion force was c ?=?3.56?MPa. The ultimate strength of coal samples after load and unload test was obviously lower than that of the triaxial compression test under the same confining stress conditions, and the deviatoric stress‐permeability curves consistent with the exponential function under two stress paths. In load and unload test, the damage degree of raw coal was characterized by the permeability damage rate and the maximum permeability damage rate. The permeability of coal seam was closely related to the mining stress, it presents a nonlinearly declining as the mining stress increases, and the permeability increases nonlinearly when the mining stress was released.
机译：本文采用伺服控制的渗漏装置对采煤进行了渗流试验。这些测试包括常规的三轴压缩渗透测试以及加载和卸载渗透测试。可以看到，随着围压的增加，原煤样品的峰值强度和相应的轴向应变逐渐增大，这符合Mogi-Coulomb强度准则，并且内部摩擦角的计算公式为Φ？=？42.65°，并且内聚力为c≤3.56MPa。在相同的围压条件下，煤样的极限强度明显低于三轴压缩试验，在两个应力路径下，偏应力-渗透率曲线与指数函数一致。在装卸试验中，用渗透率破坏率和最大渗透率破坏率来表征原煤的破坏程度。煤层的渗透率与开采应力密切相关，随着开采应力的增加呈现非线性下降的趋势，而开采应力释放后渗透率则呈非线性增加的趋势。

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