Experimental device and method for monitoring porosity and permeability changes of ore bed

Abstract

The invention provides an experimental device and method for monitoring porosity and permeability changes of an ore bed, and the method comprises the following steps: a containing box is arranged on the side wall of a shading camera obscura in a penetrating and sealing manner, and a CCD camera and a constant light source are arranged on the two sides of the containing box respectively and directly face the two side walls of the containing box respectively, and located on the inner side and the outer side of the shading camera obscura respectively, and light-transmitting parts are arranged on the side walls, corresponding to the CCD camera and the constant light sources respectively, of the containing box; a constant light source and a CCD camera are started; a leaching agent is introduced into the containing box; the CCD camera obtains transmission light information and keeps an open state until the seepage simulation motion is finished; the data processing mechanism processes the experimental data to establish a fluid saturation model, an image of the light intensity value changing along with the time and a relational expression between the light intensity value and the fluid saturation are obtained, then the change rule of the fluid saturation along with the time is obtained, and according to the relational expression between the permeability and the fluid saturation and the relational expression between the porosity and the fluid saturation, the spatio-temporal evolution law of the porosity and permeability of the ore bed is finally obtained.

Description

Technical field[0001]The present invention relates to the field of metal mine immersion, and more particularly to an experimental apparatus and method for monitoring porosity and permeability of the mineral layer.Background technique[0002]Uranium, uranium is a naturally buried, and the leaching liquid is directly entered into the underground ore rock layer by the drilling, and the ore is selectively dissolved by the chemical reaction of the dissolution and minerals, and then in the reactive strip The formation of jirdinous compound solution is extracted without making ore or surrounding rocks produces a displacement of displacement. During the low permeability sandstone uranium mine mining, the change of the pore and permeability of uranium moon reservoirs is studied, and the problem of solving the problem of mineral clogging, the arrangement of the artificial technology and the improvement of the natural production capacity and leaching rate have a key role. At present, the most co...

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Problems solved by technology

[0004] In the existing scheme above, there are the following problems: first, the saturation obtained in the column leaching experiment, that is, the permeability data is the comprehensive saturation of the entire sand column volume, rather than the spatial distribution of saturation on the entire sand column, which cannot be detailed. Study on the spatial continuous variation of porosity and permeability of ore-bearing layers

Second, in the column leaching experiment, due to the limitation of the sampling time interval, it is impossible to directly monitor and study the continuous change law of the porosity and permeability of the ore-bearing layer on the time scale

Third, in the column leaching experiment, there will be errors in the manual operation of the measured parameters and the calculation of the permeability coefficient.

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