巷道-井中激电测量数据（2021）

将井中/巷道激发极化测量应用于矿区深部探测，在无参照、零经验的情况下，通过大量试验与实际工作，摸索出了矿区地表发射、巷道接收的地-巷工作方式，突破了矿区地表AB电阻高、巷道难以布设接收电极、地表发射与巷道接收信号同步难等技术难题，总结了矿区巷道激发极化测量数据采集方法技术，探索了介于“半空间”和“全空间”之间的激发极化数据处理与解释方法。A极位于二选厂上方、3000m深井以北，地形平坦，地表草皮发育，海拔高度约5134m。B极位于矿区通往采场的道路与检查站之间，地形平坦，基岩裸露，海拔约4672m。本次采用加拿大凤凰地球物理公司V8多功能电法工作站进行数据采集。使用1台V8，一次可接收三道电信号。每次观测3道数据，观测时间大于3分钟，待数据稳定后记录并保存数据。下井前先开机锁定卫星，下井后使用仪器内置石英钟；定制仪器电源线，可同时接两个电瓶，在仪器不断电的情况下更换电源，确保仪器井下不断电。本次布设激发极化测量的巷道主要为近垂直的两组，一组走向约为30°，另一组走向约为120°，获取的充电率也是两个不同方向上的数据。为了统一研究对比，将二者进行了转化计算，统一取AB极方向（走向16°）的分量充电率值作为真值进行解释。

The borehole/roadway induced polarization (IP) measurement was applied to deep prospecting in mining areas. Without reference data or prior experience, through extensive tests and practical work, a ground-roadway working mode of surface emission and roadway reception was explored for the mining area, breaking through technical difficulties including high AB resistance on the surface, difficulty in arranging receiving electrodes in roadways, and difficulty in synchronizing signals between surface emission and roadway reception. The data acquisition methods and techniques for roadway IP measurement in mining areas were summarized, and a data processing and interpretation method for induced polarization between "half-space" and "full-space" was explored.

Electrode A was located above the No.2 Concentrator, north of the 3000m deep well, with flat terrain, well-developed surface grass, and an altitude of approximately 5134m.

Electrode B was located between the access road from the mining area to the stope and the check station, with flat terrain, exposed bedrock, and an altitude of approximately 4672m.

This data acquisition was carried out using the V8 Multi-function Electromagnetic Workstation produced by Phoenix Geophysics of Canada. One V8 unit is capable of receiving three-channel electrical signals simultaneously. Three channels of data were collected per observation run, which lasted more than 3 minutes. Data was recorded and stored once the measured signals stabilized.

Prior to entering the underground roadways, the instrument was powered on to lock onto GPS satellites; after entering the roadways, the built-in quartz clock of the instrument was utilized for timing. A customized instrument power cable was developed, which can connect two batteries simultaneously, allowing for battery replacement without powering off the instrument, thus ensuring uninterrupted power supply during underground operations.

The roadways where IP measurements were deployed in this survey were primarily two sets of near-vertical structures: one set with a strike of approximately 30° and the other with a strike of approximately 120°, so the resulting chargeability data were obtained from two distinct directions. For the purposes of unified research and comparative analysis, the two datasets were converted and calibrated, and the component chargeability value along the AB electrode strike direction (16°) was uniformly taken as the true value for data interpretation.

搜集汇总

背景与挑战

背景概述

该数据集包含2021年在西藏甲玛矿区进行的巷道-井中激发极化测量数据，采用加拿大凤凰地球物理公司V8多功能电法工作站采集，数据空间分辨率为10m - 100m，主要用于矿区深部探测。数据采集过程中克服了地表发射与巷道接收信号同步难等技术难题，并总结了数据采集与处理方法。