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shui wen shui jing chong xi ye shen tou hui fu lv de shi yan yan jiu
Author(s): 
Pages: 49-51
Year: Issue:  1
Journal: Hydrogeology and Engineering Geology

Keyword:  无固相冲洗液钻探施工地下水资源渗透恢复率地层压力含水层水文水井钻探基岩风化层含水特征第三纪;
Abstract: <正> 地下水资源的开釆,多在第三纪、第四纪含水层,凡是具有含水特征的地层,多为松散的卵砾石,砂砾石,砂层、基岩风化层或破碎带,孔隙发育,而且多数孔隙是相互连通的。在钻探施工中遇到含水层时,由于液柱压力与地层压力不平衡,冲洗液中的固相颗粒渗入到地层孔隙里,堵塞了含水层,并在井壁
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