工程地质学报Issue(4)：641-645,5.DOI:10.13544/j.cnki.jeg.2015.04.008
地应力对低渗透性岩体的渗透率影响分析
EFFECTS OF GEO-STRESSES TO PERMEABILITY RATE OF LOW PERMEABLE ROCK AT DIFFERENT DEPTHS
胡继华 1宋勇超 1杨球玉 1王旭宏 1杨立建1
作者信息
- 1. 中国核电工程有限公司总图地质所 北京 100840
- 折叠
摘要
Abstract
In recent years,groundwater contamination can be caused by deep geological disposal of nuclear waste,CO2 deep geological disposal,landfills,hydroelectric reservoir leakage,oil pipeline leakage,which is attractedmuch attentions.The safety and reliability of these projects are closely related with the lowpermeability rock.Forthis problem,the low permeability of shale is studied with hydraulic fracturing method to measure stress and waterpressure test method for measuring rock permeability.The results show that:(1 )Stress value of the study areashows an increasing trend with the depth of the hole,in line with the general distribution of stress;(2)Rockpermeability decreases with depth.From 0 to 1 00m deep,water permeability changes greatly.From 1 00 to 400mdeep,water permeability changes little.From 400 to 600m deep,the rock permeability rate remains at a relativelystable order of magnitude.According to regression analysis,the rock permeability rate and depth of the hole have agood negative exponential relationship.(3 )Rock permeability and geostress have a negative exponentialrelationship.The impact of geostress on the rock permeability is a certain difference at different regions.This isconsistent with the findings of other scholars.It forms the foundation for future research on seepage of lowpermeability rock.关键词
渗透率/水压致裂/地应力/压水试验Key words
Permeability/Hydrofracturing/Geostresses/Water pressure test分类
建筑与水利引用本文复制引用
胡继华,宋勇超,杨球玉,王旭宏,杨立建..地应力对低渗透性岩体的渗透率影响分析[J].工程地质学报,2015,(4):641-645,5.
