尾矿库库区勘察物探方法与钻探方法对比分析

Comparative analysis of geophysical prospecting methods and drilling methods in tailings reservoir area

广西地区尾矿库建设工作中,尾矿库库区一般位于岩溶发育区,为给将来设计与施工提供工程地质基础资料,首先需要对尾矿库建设区域进行工程地质勘察。而对岩溶场地进行工程地质勘察最常用的两种手段就是物探与钻探,两种手段对于岩溶场地勘察各有优劣性,物探手段一般范围较广,对岩溶主要发育区有明显区别;钻探手段一般只对钻孔内情况进行说明,对单个钻孔内所发现的岩溶发育情况及其规律进行说明。物探方法通过对电阻率大小的解译结果区别出库区内所存在的岩溶现象。钻探方法通过现场钻机取芯以后,可以通过钻孔钻心较为直观的观察出所存在的地层岩性以及岩溶地质现象。两种方法的联合运用,既能从整体上排查,又能对各个勘探点进行详细区分,所获得的勘察基础资料将更有利于后续尾矿库的设计与建设工作。

In the construction of tailings pond in Guangxi,Tailings reservoir area is generally located in Karst Development Area,To provide basic engineering geological data for future design and construction,First of all,it is necessary to carry out engineering geological survey for the construction area of tailings pond.The two most commonly used means of engineering geological exploration for Karst sites are geophysical exploration and drilling,Two methods have advantages and disadvantages for Karst site investigation,Generally,geophysical means have a wide range,There are obvious differences in the main karst development areas;Generally,drilling means only describe the situation in the borehole,The development and law of karst found in a single borehole are described.The geophysical method distinguishes the karst phenomenon in the ex warehouse area by interpreting the resistivity.Drilling method after coring by on-site drilling machine,The formation lithology and karst geological phenomenon can be observed directly through the drilling center.Joint application of the two methods,It can be checked as a whole,In addition,it can distinguish each exploration point in detail,The obtained basic survey data will be more conducive to the design and construction of tailing pond in the future.