充填泥沙裂隙岩石渗流特性的实验研究  

EXPERIMENTAL STUDY OF PERMEABILITY IN FRACTURED SANDSTONE WITH SEDIMENT PARTICLES

作　　者：王甘林[1] 刘卫群[1] 陶煜[1] 

机构地区：[1]中国矿业大学力学与建筑工程学院,深部岩土力学与地下工程国家重点实验室,徐州221008

出　　处：《力学与实践》2010年第5期14-17,13,共5页Mechanics in Engineering

基　　金：国家自然科学基金(50774083,40811120546);教育部“新世纪优秀人才支持计划”课题(NCET-07-0803);国家“973计划”项目子课题(2005CB221502)资助项目

摘　　要：对人工充填泥沙裂隙岩石在MTS815.02电液伺服岩石试验系统上进行渗流实验,同时结合岩石孔隙电子显微照片,探讨了泥沙颗粒对裂隙岩石渗透特性的影响规律.实验表明,在泥沙颗粒的作用下,裂隙岩样渗透率明显减小;泥沙颗粒在岩样宏观裂隙中运移达到重新平衡之后,裂隙岩样渗透率随时间逐渐增大并最终趋于稳定.Sediment particles in natural rock with a large number of connected cracks and faults,have some impact on the transport of groundwater and the variable permeability by creating micro-cracks and damage zones around faults.In this paper,an experiment about seepage on the rock electro-hydraulic servo test system of MTS815.02,together with electron micrograph of sandstone pore,is designed and used to investigate the relationship between the variable permeability and the filling silt in creating cracks.Results show that the permeability in cracked rock decreases distinctly under the silt-induced effect.The permeability,along with the sediment particles in macro-fissures in the cracked rock to achieve re-balancing of transport,gradually increases over time and eventually stabilizes.

关 键 词：人工充填 泥沙颗粒 裂隙岩石 渗流特性 

分 类 号：TD315[矿业工程—矿井建设]