豫西地区三叠系石佛组碎屑岩富水性探讨

Discussion on Triassic Shifo Formation Clastic Rocks Water Yield Property in Western Henan Area

通过对豫西地区三叠系石佛组碎屑岩岩性、结构特征、岩性组合、碎屑岩裂隙水富水特征的分析,结合工作实例,对该地区碎屑岩裂隙地下水找水方法进行初步探讨。根据该区三叠系碎屑岩水文地质特征,首先井位要尽量选择在地形坡度相对较缓且覆盖层较厚的地带,然后在初步选定地段进行必要的地面电法勘探,以进一步确定覆盖层类型、岩性及厚度,并圈定裂隙相对发育地段。按照上述方法,在该区找到了较为理想的布井位置,其单井出水量一般可达20m3/h,成井率较高。

Through analyses of western Henan Triassic Shifo Formation clastic rock lithology, texture characteristics, lithological assemblage, water yield features, combining with case studies preliminarily discussed fissure groundwater research method in the area. According to the area＇s Triassic clastic rock hydrogeological characteristics, the first thing is to select well site in slope relatively gentle, overburden thicker terrain when it is possible, then carry out necessary surface electric prospecting in the selected area, to further determine overburden type, lithology and thickness, circle out fissure relatively developed area. In the light of above mentioned method, relatively perfect well site has found, individual well yield can be 20m^3/h, and hither well completion rate.