Study On Using Time Domain Induced Polarization For Detecting Buried Pipelines In Mineral Processing Plants

The selection plant is an important technological process in the mining production process,and the buried pipeline is an important conveying pipeline in the mine.The existence of pipeline leakage problems will directly affect the production efficiency and safety of the mine.Traditional buried pipeline leak detection techniques mainly include gas detectors and water pressure detectors,which have limited detection accuracy and require a lot of time and manpower.Moreover,traditional leak detection methods have many limitations,such as difficult positioning,long detection time,and many external factors.Time-domain induced polarization is based on induced polarization with the addition of a time dimension,which is more conducive to the determination of leakage location and provides a new approach for detecting buried pipeline leaks in the selection plant.To this end,experimental materials were collected at a certain selection plant and a buried pipeline leakage model was simulated in the laboratory under soil and fine sand media conditions using similar materials.Control variable experiments were conducted under different media and pipeline diameters.After the experiment,data was extracted from the instrument and converted using software.The data was then processed by eliminating abnormal points and input into inversion software for least-squares inversion.After iteration,image analysis was performed.The instrument used in the experiment was the instrument from Chongqing Geological Instrument Factory,with a Wenner device.According to the inversion results,the pipeline leakage was not related to the pipeline diameter,but only to different media.Under two different media conditions,the study showed that as the leakage frequency increased,the lowresistance anomaly areas in both media would continuously increase.In the soil media,the lowresistance anomaly area began to show no significant changes after the 14 th leakage,while in the fine sand media,the low-resistance anomaly area began to show no significant changes after the 8th leakage.Since the permeability coefficient of fine sand is larger than that of soil,water leakage reaches saturation faster.From the perspective of apparent resistivity analysis,the apparent resistivity of fine sand and soil media is smaller,with weaker water absorption in fine sand,so the apparent resistivity of soil is smaller under the same leakage conditions.However,the decrease trend of apparent resistivity in fine sand media is more obvious than that in soil media.From the perspective of time-domain induced polarization,based on the first inversion result,residual values were calculated between the subsequent inversion results.The diffusion rate of the leakage point in the fine sand media was significantly higher than that in the soil media.The residual values in each stage in the soil media well reflected the change of resistivity during the diffusion process.The change in residual values could well represent the diffusion of water,and the obtained diffusion law of leakage was used to infer the diffusion range before the current time point,which assisted in determining the position of the infiltration point.In summary,this article investigates the application of the time-domain induced polarization method to detect leakage in buried pipelines at a mineral processing plant,and verifies the feasibility and effectiveness of this method through experiments.The method has broad application prospects and promotion value,but further experiments and research are needed to improve and enhance the accuracy and feasibility of the technology.