首页 | 本学科首页   官方微博 | 高级检索  
     

矿山压力下断层破碎带的导水性研究
引用本文:翟建廷,汪吉林,杨靖.矿山压力下断层破碎带的导水性研究[J].煤矿安全,2012,43(11):37-40.
作者姓名:翟建廷  汪吉林  杨靖
作者单位:1. 淮北矿业集团袁店二矿,安徽淮北,233665
2. 中国矿业大学资源与地球科学学院,江苏徐州,221116
3. 中国矿业大学资源与地球科学学院,江苏徐州221116 重庆136地质勘探队,重庆401147
摘    要:为了探讨断层带充填破碎岩石条件下的导水性,实地采集岩样,配制了全砂岩、砂泥岩含量2∶1、砂泥岩含量1∶2等3组实验样品,模拟实际的矿山压力和渗流水压等条件,测量渗流速度,计算渗透系数。结果表明破碎岩石的泥质成分越高,则相同条件下的渗透系数越小;在相同的矿山压力条件下,破碎岩石的渗透系数与渗流水压呈非线性反比例关系。认为断层带破碎岩石中含粘土矿物较多时,岩石易吸水膨胀、软化,增加对地下水渗流的阻碍作用;瞬间施加的渗流水压使样品被压密,导致孔隙被压缩,表现为渗透系数减小;实验成果可用于近似判断断层破碎带的实际渗流特性,可合理解释某些矿区断层发育、承压水头高但却不导水的现象。

关 键 词:断层破碎带  矿山压力  渗流水压  导水性  渗透系数

Study on Transmissivity of Shattered Fault Zone Under Ground Pressure
ZHAI Jian-ting,WANG Ji-lin,YANG Jing.Study on Transmissivity of Shattered Fault Zone Under Ground Pressure[J].Safety in Coal Mines,2012,43(11):37-40.
Authors:ZHAI Jian-ting  WANG Ji-lin  YANG Jing
Affiliation:2,3(1.No.2 Coal Mine of Yuandian,Huaibei Mining Group,Huaibei 233665,China;2.School of Resources and Earth Science,China University of Mining and Technology,Xuzhou 221116,China;3.Chongqing NO.136 Geologic Prospecting Team,Chongqing 401147,China)
Abstract:For studying transmissivity of fault zone filled with shattered rock,a simulation experiment was designed under the conditions of actual ground pressure and seepage force.Three sets of samples were collected in mine roadways,which were pure sandstone,sandstone mixed mudstone by 2∶1,and sandstone mixed mudstone by 1∶2.The permeability coefficient was calculated by measuring seepage velocity.The result shows that the higher composition of mud in shattered rock will result in the lower permeability coefficient under same conditions.The permeability coefficient of shattered rock presents non-linear inverse proportion with seepage force under the same underground pressure.It is concluded that the clay mineral contained in shattered rock of fault zone will result in the rock sopping up the water and being swelled and intenerated,which will block groundwater seepage.Otherwise,the seepage force,which was brought to bear on rock sample quickly,makes the holes in sample be compressed and decrease permeability coefficient.The result of the experiment can be used to estimate the actual seepage characteristic of fault zone filled with shattered rock approximatively.It can explain the phenomenon reasonably that some fault's transmissivity is very poor with high confined water head in some mines.
Keywords:shattered fault zone  ground pressure  seepage force  transmissivity  permeability coefficient
本文献已被 CNKI 万方数据 等数据库收录!
设为首页 | 免责声明 | 关于勤云 | 加入收藏

Copyright©北京勤云科技发展有限公司  京ICP备09084417号