摘要
从紊流非达西流角度出发,利用压水孔水压、压水段长度、观测孔水压和流量等参水,推导出高水压条件下岩体渗透系数计算公式。结合某矿下组煤底板压水试验成果,分析了不同水流状态下计算的渗透系数的差异性,得出水流状态对岩体渗透系数计算的结果影响巨大,水压的变化引起岩体渗透性的剧烈变化。本文建议的渗透系数计算公式为裂隙岩体紊流状态下的非达西流渗透系数的计算提供了一种有效的方法。
Based on turbulent flow and non-Darcy flow, the hydraulic conductivity calculating formula was derived by using hydraulic pressure in water injection borehole, length of the water injection part, hydraulic pressure and discharge in monitor borehole. With the test results of coal seam floor＇s water-pressure in a mine, the difference of hydraulic conductivities under different flow status were analyzed, and it shows that the calculating result of hydraulic conductivity is greatly influenced by flow patterns, and the rock masses＇ permeability can be changed greatly by hydraulic pressure. The paper provides an effective method for calculation of non-Darcy flow hydraulic conductivity in fracture rocks under turbulent flow conditions.
出处
《采矿与安全工程学报》
EI
CSCD
北大核心
2016年第2期324-328,335,共6页
Journal of Mining & Safety Engineering
基金
国家重点基础研究发展计划(973)项目(2013CB036000)
关键词
高压压水试验
紊流
非达西流
渗透系数
high water-pressure test
turbulent flow
non-Darcy flow
hydraulic conductivity
