摘要
为了对不同地层接触区裂隙结构面的渗流特征进行研究,针对单裂隙异质岩体的变形参数及渗透系数,通过理论推导得出计算公式,并用试验对公式的正确性及适用性进行验证.研究结果表明：在相同裂隙水压和围压作用下,单裂隙粗砂岩、单裂隙细砂岩及单裂隙异质岩体的渗透系数各不相同,由此说明裂隙面两侧岩性对裂隙岩体渗透性有显著影响;裂隙岩体渗透系数随围压增大呈减小分布,且数值变化限定在一定围压范围内,当围压达到一定值时渗透系数趋于稳定;将推导所得的单裂隙岩体渗透系数理论计算值与试验结果进行对比分析,发现二者符合较好,从而表明推导所得的单裂隙岩体渗透系数理论计算公式的正确性与适用性.
In order to study the seepage characteristics of fracture surfaces in different formation contact areas,the deformation parameters and permeability coefficients of a single fracture heterogeneous rock mass were discussed.Formula by theoretical deduction was derived,and the correctness and applicability of the formula were verified by experimental method.Research results show that under the same fracture hydraulic pressure and confining pressure,the permeability coefficients of three kinds of single fracture rock mass are different,indicating that the lithology on both sides of fracture surface has significant influence on the permeability of fractured rock mass.The permeability coefficient of fractured rock mass decreases with the increase of confining pressure,and the change is confined to a certain confining pressure range,and the permeability coefficient tends to be stable when the confining pressure reaches a certain value.The calculated value of the proposed theoretical calculation formula of permeability coefficient of the fractured rock mass was compared with the experimental results,showing excellent agreement,which verified the correctness and applicability of the proposed theoretical calculation formula of permeability coefficient of fractured rock mass.
作者
王渭明
王晓杰
张为社
田忠喜
Wang Weiming;Wang Xiaojie;Zhang Weishe;Tian Zhongxi(School of Civil Engineering and Architecture,Shandong University of Science and Technology,Qingdao 266590,Shandong China;College of Architecture and Civil Engineering,Liaocheng University,Liaocheng 252000,Shandong China)
出处
《华中科技大学学报（自然科学版）》
EI
CAS
CSCD
北大核心
2018年第10期40-45,共6页
Journal of Huazhong University of Science and Technology(Natural Science Edition)
基金
国家自然科学基金资助项目(41472280)
关键词
单裂隙异质岩体
变形参数
渗透系数
理论公式
渗流试验
single fractured heterogeneous rock mass
deformation parameter
permeability coefficient
theoretical formula
seepage test
