基于CT三维重建的高阶煤孔裂隙结构综合表征和分析

为有效研究煤的孔裂隙结构特征,实现对煤的孔裂隙结构的定性定量表征和分析。以内蒙古巴彦高勒煤矿311102运输巷的煤样为研究对象,基于ZEISS Xradia510 Versa X射线显微镜扫描得到的CT数据,结合三维可视化软件AVIZO中内置数学算法,提出了煤的孔裂隙结构定量表征的方法,并建立了煤的三维孔裂隙结构模型和具有拓扑结构的孔隙网络简化模型。通过本文提出的方法,对巴彦高勒煤矿煤样的孔裂隙微观参数——孔径大小、孔体积、孔隙率、配位数、喉道长度等进行了统计分析。研究表明:在微米的尺度下,内蒙古巴彦高勒煤矿的煤样以大孔为主,并伴有网状的割理裂隙,有效孔隙率为10.34%,通过孔隙网络模型统计出的孔隙数为12 834,喉道数为432及其他的微观结构参数。

Characterization and analysis of pores and fissures of high rank coal based on CT three-dimensional reconstruction

To effectively study the characteristics of coal pore and fissures，the pore and fissures of coal were characterized by qualitative and quantitative characterization and analysis.The coal sample of 311102 working face in Bayangaole Colliery of Inner Mongolia was studied.Based on the IEISS Xradia 510 X-ray microscope Get the CT data.The mathematical algorithm was embedded in the three-dimensional visualization software AVIZO.The study proposed the methods of quantitative characterization of pore and fissure and set up a three-dimensional model of pore and fissure of coal and a pore network model with topology structure.The coal sample microscopic parameter of pore and fissures includes pore size，pore volume，porosity，coordination number and length of throat.The results show that under the micron scale the coal samples of Bayangaole Colliery are mainly in macroporous and have a cleat network.Its effective porosity is 10.34%.The number of pores is 12 834，and the number of throats is 432.These are calculated by the pore network model.