Experimental Study On The Gas Permeation Characteristics Of Wet Uranium-bearing Ore Under Coupling Effect Of Temperature And Pressure

With the rapid development of the economy,the demand for natural uranium is increased,prompting the development of uranium mining in China from traditional shallow mining to deep mining.Uranium mining methods in China are shifted from traditional shallow mining to deep mining.With the increase of the depth of uranium mining,surrounding rock temperature,pore confining pressure and water saturation are changed,and the gas permeability of uranium ore and surrounding rocks in deep wells has been greatly affected.From a microscopic or microscopic point of view,the radon in the pores are uniformly mixed in the air seepage and are affected by the air seepage.There are few domestic studies on the law of gas permeability in uranium ore surrounding rocks.The effects of temperature,pressure,and water saturation on the permeability of gas in surrounding rock pores have not been fully analyzed.Experimental study on the gas permeation characteristics of wet uranium-bearing ore under Coupling Effect of Temperature and Pressure,analysing the mechanism that simulates the gas permeability of uranium ore by various factors has an important guidingrole in ensuring the protection of deep uranium mine boreholes.This study is the part of national nature science found project“three poor coupling mechanism of deep uranium well radon exhalation and line of radon airflow calculation mode research”.Physical physico-mechanical parameters of natural uranium ore are used as reference,On the basis of the similarity theory and the orthogonal experiment,the simulated uranium ore which conforms to the experimental requirements most are used to prepare and selected as samples preferentially.Through the permeability measuring device,the influence of temperature,pressure and water saturation on the gas permeability of the simulated uranium ore is studied,the influence of the paper's main research content is as follows:(1)Through physical and mechanical experiments,the relevant parameters of natural uranium ore rock were analyzed,On the basis of the similarity theory and the orthogonal experiment,a certain uranium tailings as well as the quartz sand are selected as the aggregates,the cement as the cementing material,which is supplemented with the admixture(fine iron powder,microsilica ponder),modified admixture(early strength agent,water reducer),and distilled water.the simulated uranium ore which conforms to the experimental requirements most are used to prepare and selected as samples preferentially.(2)Through the Uranium ore gas permeability measuring device,the pressure,temperature,and water saturation of the gaspermeability of uranium-bearing similar material are altered.,corresponding gas permeability parameters are measured and calculated.(3)Through the gas permeability data based on experiments,the law of gas permeability under one-factor interaction and multi-factor coupling was analyzed,and the effect of temperature,pressure and water saturation on uranium-bearing similar material is summarized.