声波电视在刚果(金)铜钴矿勘察中的应用

Application of Acoustic Televiewer for Engineering Investigation in a Copper-cobalt Mine, Congo(DRC)

声波电视是利用声波走时和振幅参数进行钻孔壁成像的一种地球物理测井系统。由于采用数字技术和配置功能完善的软件,系统具有图像分辨率高、测井速度快、可在混浊的井液中工作、数据处理和分析过程相对简单的特性,是研究岩层结构面的有效手段。在刚果(金)某铜钴矿岩体稳定性评价中,采用声波测井方法,获取岩体的优势结构面,为确定采坑边坡角、岩体抗剪强度指标提供了可靠数据。本文介绍RG声波电视测井的原理及方法,以DK02孔为例,对所揭露岩层结构面、裂隙发育信息进行分析。工程实践说明,声波井下电视在进行深部岩体的原位勘察方面具有明显优势。

Acoustic televiewer is a geophysical logging system which utilizes acoustic travel time and amplitude parameters for borehole wall imaging. The system has such that characteristics： high image resolution, fast logging speed, working in turbid well fluid, data processing and analysis process relatively simple because of its perfect software with digital technology and configuration. It is an effective means to study the structure surface of the rock strata. In the evaluation of the rock mass stability of a copper-cobalt mine in Congo （DRC）, the acoustic logging method is used to obtain the dominant structural surface of the rock mass. The reliable data are provided for determining the slope angle of the open mining pit and shear strength index of the rock mass. The principle and method of the RG Acoustic televiewer logging are introduced in this paper. And rock mass structure surfaces and fractures revealed by borehole in wall image were analyzed, taking DK02 as a example. Engineering practice shows that the acoustic television in deep rock mass in situ investigation has obvious advantages.