| According to the indoor soil column leaching process,different concentrations of soluble extracts affect the permeability change of rare earth soil column and its causes of indoor remodeling using a rare earth mine in Ganzhou Dingnan,respectively using 5% and 2%,the water of soil column leaching for 21 days,to analyze the rule and reasons for penetration the change of the parameters,it is concluded that the pore distribution is the key factor that directly determines permeability coefficient;and the use of nuclear magnetic resonance technology on soil column measured were calculated and quantified by the general calculation method;finally on the permeability of the software simulation,and puts forward relevant suggestions.The results of the above work are as follows:1)permeability variation: ammonium sulfate leaching permeability increases sharply,decreases sharply,then remained stable,the degree slows down as the concentration increases.;leaching water permeability increased gradually,then decreases gradually;cause permeability change is caused by the interaction of particle migration and increased pore water gravity effect of the pore compression;and the degree of particle migration in the solution containing cations were negatively correlated.2)the random walk method to calculate the remolded soil surface pre-relaxation rate,and then use the transverse relaxation rate of pre T2 magnetic resonance spectroscopy to calculate the distribution of the pore,defined the name of the various pore radius;by comparing the porosity and permeability coefficient,it is concluded that pore distribution is the key factor that directly determines permeability coefficient.3)by using Geo-studio numerical simulation software to calculate the 21 days of leaching period,water level,rare earth slope seepage line and pore water pressure change,without considering rainfall conditions,after the numerical leaching,about sixth days the statistics have basically no change;... |
PDF Full Text Request