水平孔多参数综合测试仪器研发与应用

Development and application of multi‑parameter integrated testing instrument for horizontal hole

为研究引大济岷工程隧洞岩体特征、岩溶发育特征、地应力特征和地下水特征等,在泸定取水中线方案的引水线路中布置水平钻孔8个,共计2300 m。为满足对水平孔综合测试的需求,研制了一套适用于水平钻孔的存储式综合测井仪器。本文分析了水平孔多参数综合测试仪器各参数测量的基本工作原理;详细阐述了各功能单元的电路构成选型,主要采用DSP微处理器和大规模集成电路,结合传感器技术实现多种参数的综合测量,包括:水平钻孔的压力、温度、自然伽马、声波波速、孔内电视图像。综合测试仪器集成了模拟传感器、模拟调理电路、数据采集、数据处理、信息存储、数据通讯、信息交换、测控软硬件、电脑显示等功能,是水平孔综合测试不可缺少的技术。在引大济岷工程的水平定向孔中成功应用,一趟起下钻解决了水平钻孔的井斜、方位角、压力、温度、自然伽马、孔内电视测试的难题,尽最大可能保证了钻孔的安全及降低了劳动强度。

In order to study the characteristics of rock mass,karst development,ground stress and groundwater in the tunnel of the Dadu River to the Min River Replenishment Project,8 horizontal boreholes with a total of 2300 m were arranged in the diversion route of the Luding Water intake Middle route scheme.In order to meet the demand of horizontal hole comprehensive testing,a set of storage comprehensive logging instrument suitable for horizontal drilling is developed.This paper analyzes the basic working principle of the horizontal hole multi⁃parameter comprehensive measuring instrument.The circuit composition selection of each functional unit is described in detail.DSP microprocessor and large⁃scale integrated circuit are mainly used,and the sensor technology is combined to realize the comprehensive measurement of many parameters,including:pressure,temperature,natural gamma ray,acoustic wave velocity,and TV image in the hole.Integrated testing instrument integrates analog sensor,analog conditioning circuit,data acquisition,data processing,information storage,data communication,information exchange,measurement and control hardware and software,computer display and other functions,is an indispensable technology for horizontal hole comprehensive testing.It has been successfully applied in the horizontal directional hole of the Dadu River to the Min River Replenishment Project,and the problems of incline,azimuth,pressure,temperature,natural gamma ray and TV test in the hole have been solved in one trip,thus ensuring the safety of the hole and reducing the labor intensity as far as possible.