摘要
为研究湖北高烽磷矿副井岩石的渗流特性,本文选取矿区主要含水层段的白云岩为研究对象,在将其制成标准试件后,通过RYL-600剪切流变仪制备裂隙白云岩试件,并在MTS815岩石力学试验系统上对其进行渗流试验.研究结果表明:(1)裂隙白云岩的孔隙压差是关于时间序列的四次多项式,渗流状态为非Darcy流,且岩样渗流的非Darcy效应随围压的增大不断增强;(2)裂隙白云岩非Darcy流的渗透率恒小于Darcy流的渗透率,岩样渗透率随围压增大而减小;(3)同一轴压作用下,裂隙白云岩的渗透率与体积应力呈负指数相关,且岩样渗透率在低体积应力作用下更为敏感.
In order to study the seepage characteristics of the rock in the auxiliary shaft of Gaofeng Phosphate Mine in Hubei Province,this paper selects the dolomite in the main aquifer section of the mining area as the research object.After making it into a standard specimen,the fractured dolomite specimen is prepared by RYL-600 shear rheometer,and the seepage test is carried out on the MTS815 rock mechanics test system.The results show that:(1)The pore pressure difference of fractured dolomite is a polynomial of degree 4 about time series,the seepage state is non-Darcy flow,and the non-Darcy effect of rock sample seepage increases with the increase of confining pressure.(2)The permeability of non-Darcy flow in fractured dolomite is always less than that of Darcy flow,and the permeability of rock sample decreases with the increase of confining pressure.(3)Under the same axial compression,the permeability of fractured dolomite is negatively correlated with the volume stress,and the low volume stress is more sensitive to the permeability of rock samples.
作者
谢先斌
XIE Xianbin(Hunan Chuxiang Construction Engineering Group Company,Changsha 410114,China)
出处
《矿业工程研究》
2023年第2期9-14,共6页
Mineral Engineering Research
关键词
高烽磷矿
裂隙白云岩
渗透率
围压
体积应力
Gaofeng Phosphate Mine
fractured dolomite
permeability
confining pressure
volume stress
