基于CT技术的裂隙煤体细观数值重构方法

Micro-structure Numerical Reconstruction of Fractured Coal Body Based on CT Technology

为研究采动过程中原生裂隙对矿山压力的响应规律,运用高精度工业CT扫描技术,对王家岭煤矿12309工作面煤体原生裂隙场进行扫描,获得了煤样原生裂隙场的细观分布情况。基于Matlab软件编程,利用Soble算子对扫描所得裂隙数据进行三维重构,将三维重构结果导入PFC^(3D)数值模拟软件,建立包含原生裂隙场的煤岩三维细观数值模型。结果表明:该方法在细观尺度方面有效、精确地重构了煤样原生裂隙场,建立了充分考虑细观裂隙的PFC^(3D)细观数值模型,为提高数值模拟的可靠性与准确度提供了更为有效的数值建模方法。

In order to study the response law of primary fracture to ground pressure in mining process,the primary fracture field of coal body in 12309 working face of Wangjialing coal mine was scanned by high-precision industrial CT scanning technology,and the micro distribution of primary fracture field of coal sample was obtained.Based on Matlab software programming,the 3D reconstruction of the scanned fracture data was carried out with Soble operator,and the 3D reconstruction results were imported into PFC3D numerical simulation software to establish a 3D micro numerical model of coal and rock containing primary fracture field.The results show that the method effectively and accurately reconstructs the original fracture field of coal samples at the micro scale,and establishes the PFC3D micro numerical model with full consideration of micro fractures,which provides a more effective numerical modeling method for improving the reliability and accuracy of the numerical simulation.