摘要
为研究不同变形程度构造煤的基质压缩特征，采用压汞法和气体（N2和CO2）吸附相结合的方法，计算了渭北煤田韩城矿区不同类型构造煤的基质压缩系数，探讨了基质压缩对构造煤孔隙结构的影响。结果表明，煤的基质压缩系数不一定随构造变形程度的增加而增大，是煤级、微孔含量和构造变形等因素的综合反映；基质压缩主要影响了压力大于20 MPa的压汞孔体积；由于压汞法和N2吸附方法的测试原理不同，基质压缩校正后压汞孔体积（6～100 nm）高于N2吸附孔体积；基质压缩对压汞孔体积的影响随构造变形程度的增强而变弱。
In order to research the characteristics of the coal matrix compression （CMC） of tectonic coal at different deformation extents, the pressure-driven CMC of coal from Hancheng Coal Mine, Weibei Coalfield, was calculated by means of mercury intrusion method combined with gas adsorption （N2 and CO2） technique, and the effect of CMC on pore structure of tectonic coal was discussed. The results indicate that the CMC of coal is not necessarily increases with the increases of tectonic deformation. The variation of CMC may be the comprehensive results of factors including coal rank, micropore content and tectonic deformation. Coal compressibility has a significant effect on mercury pore volume when pressure is over 20 MPa. The mercury pore volume in the pore size range is from 6 to 100 nm after compressibility correction are higher than the results of N2 adsorption due to the different testing principles followed by these two testing methods. Increasing tectonic deformation shows a trend to decrease the effect of CMC on mercury pore volume.
出处
《煤矿安全》
CAS
北大核心
2016年第2期175-179,共5页
Safety in Coal Mines
关键词
煤基质压缩
构造煤
压汞法
孔径分布
孔隙结构
coal matrix compression
tectonic coal
mercury intrusion methodpore
size distribution
pore structure
