摘要
和煤层瓦斯压力一样,煤层透气性系数也是很重要的煤层瓦斯基本参数。目前而言,煤层透气性系数的测定主要采用中国矿大提出的建立在煤层钻孔瓦斯流动属于径向不稳定流动基础上的方法。本文利用薛湖煤矿2303风巷测压钻孔对二2煤煤层透气性系数进行了测定,对径向不稳定法测定煤层透气性系数的应用进行了较深入的探讨。本次测定煤层透气性系数结果为λ=1.14386m2/(MPa2.d)。通过本次应用探讨,结合永夏矿区煤层赋存特点,为径向不稳定法测定透气性系数在永夏矿区的推广和应用奠定了良好的基础。
Same as the gas pressure of coal seam, the permeability coefficient is also an important basic CBM parameter. Currently, we mainly adopt the method proposed by China University of Mining Technology for de- termination of permeability coefficient of coal seam, which is based on the concept that gas flow in a borehole drilled in coal seam belongs to radial unstable flow. The paper makes a further to-the-depth discussion on the application of the permeability coefficient of No2-2 seam obtained from a pressure measurement borehole in No.2303 airway in Xuehu Coal Mine. The seam permeability coefficient measured is λ = 1.14386m^2/ （MPa2. d）. Taking into consideration of the seam occurrence character in Yongxia mine area this has laid a good foundation for spreading and application of the radial unstable flow method for measurement of permeabili- ty coefficient in Yongxia mine area.
出处
《中国煤层气》
2012年第3期27-29,15,共4页
China Coalbed Methane
关键词
径向不稳定流动
瓦斯流量
测压孔
透气性系数
Radial unstable flow
gas flow quantity
pressure tap
permeability coefficient
作者简介
彭齐中，现就职于河南神火集团薛湖煤矿，主要从事瓦斯治理方面工作。
