基于虚拟影像探查的深部裂隙岩体储水分布探测研究  

Research on water storage distribution detection of deep fractured rock mass based on virtual image exploration

作　　者：孟川杰[1] MENG Chuanjie(School of Information Engineering,Sichuan Post and Telecommunication College,Chengdu 610067,China)

机构地区：[1]四川邮电职业技术学院信息工程学院,四川成都610067

出　　处：《中国测试》2022年第3期53-58,共6页China Measurement & Test

基　　金：国家自然科学基金项目(41472271)。

摘　　要：针对现有探测技术未考虑深部裂隙渗透系数,储水分布运动状况分析不清晰,导致探测精准度下降,因此,提出基于虚拟影像探查的深部裂隙岩体储水分布探测方法。计算单个深部裂隙单元等效渗透系数张量,结合三维随机裂隙岩体网络影像下岩体储水分布随机性有限元,实现虚拟三维深部裂隙网络的岩体储水和随机运动相关分析。实验显示,倾角、迹长不断增加下,渗透系数也呈逐渐增大趋势;在裂隙深度不断增加下,渗透系数呈减小趋势;当裂隙为非贯通,则隙宽对渗透系数产生的影响比较小,裂隙贯通,隙宽增加时,渗透系数呈显著性增加趋势。剖面等势线整体演进方向较为趋向裂隙发育倾向,局部渗流形态变化较大,等势线分布较杂乱且粗糙,且自由面等势线分布规律性较差,与实测结果相符。In view of the fact that the existing detection technology does not consider the permeability coefficient of deep fractures, the analysis of water storage distribution and movement is not clear, resulting in a decrease in detection accuracy. Therefore, a method for detecting the distribution of water storage in deep fractures based on virtual image detection is proposed. Calculate the equivalent permeability coefficient tensor of a single deep fracture unit, and combine the random finite element of the rock mass water storage distribution under the 3D random fractured rock mass network image to realize the correlation analysis of the virtual 3D deep fracture network rock mass water storage and random motion. Experiments show that as the dip angle and trace length continue to increase, the permeability coefficient also shows a gradual increase trend;as the fracture depth increases, the permeability coefficient shows a decreasing trend;when the fracture is not perforated, the effect of the gap width on the permeability coefficient is compared. If the gap is small, the permeability coefficient will increase significantly when the gap width increases under the crack penetration.The overall evolution direction of profile equipotential lines tends to develop fractures, the local seepage morphology changes greatly, the distribution of equipotential lines is messy and rough, and the regularity of free surface equipotential lines is poor, which is consistent with the measured results.

关 键 词：虚拟影像探查 岩体 裂隙深度 储水分布探测 随机性有限元 

分 类 号：TU463[建筑科学—结构工程] TB9[建筑科学—土工工程]