The Research Of Radon Exhalation Law Of Uranium Tailings Sandstone Under TVU-coupling

The new energy power generation has been rapidly grown with recent years.When fire and coal power generation has been brought versatile environmental issues around the globe,nuclear power generation,with the advance of clean energy,has been developed dramatically in these years,which makes the demand of uranium urgently.In order to meet the requirement of national economy of the resource,the mining depth of uranium has been increased in some uranium mine.Due to the current research scenarios,the research of radon under multi-field coupling environment at home is relatively few.Henceforth,the experimental research of radon exhalation effect of porous emanation medium under multi-field coupling was studied,put forward the radon exhalation rate change rule under temperature,frequency and acoustic waves and offered the guideline and precautions of uranium mine of radon control.Initially,the research status at home and abroad has been studied by looking up tremendous references on similar materials;the quasi-uranium sandstones have been made according to the research of similar materials by some scholars at home and abroad.In addition,the orthogonal designhas been utilized to determine the ratio of water-cement and the mass ratio between uranium tailings sand and cement as well as the orthogonal experiment.Ultimately,the optimized proportional rate of water-cement was 0.435;mass ratio of water-mixture was 0.565,and the mass percentage of iron powder is 4.5.The sandstones have been synthesized and measured by utilizing the ultrasonic wave generation equipment,water bath temperature control and frequency signal device as well as power amplifier to gain the law of accumulative radon exhalation concentration and radon exhalation rate.This could compensate the law of under this occasion,which could also provide the theoretical foundation of radon control.The main research has been said as the follows:(1)The sample has been replaced the original sample based on the orthogonal design due to the difficulties of selection.The mass proportion of uranium tailings sand and water is the main influence compared with the density,acoustic waves and uniaxial strength,and the number of iron powder plays crucial role in the thermal conductivity of sample.(2)The radon exhalation rate of sample has been calculated by the experimental results.To begin with,the radon exhalation effect of porous emanation medium has been analyzed under single factor,searched the change ratio of exhalation rate positive correlation.The function of thiscould be used for the prediction of radon content under complicated environment.(3)The remarkable influenced factor has been found by variance analysis.The remarkable value of temperature far outweighs others under the coupling effect,which can be illustrated that temperature would be the prerequisite when the radon exhalation rate needs to be controlled in the mine shaft.