A method of restricting the inflow of radon in mine workings

 

The invention relates to mining, in particular for ventilation of mine workings. The technical result of the invention is the provision of a high efficiency decrease of receipt of radon in the work of excavation. For this purpose from mining in the surrounding rock mass drill hole and pumped it a radon coming from the surrounding mining rock mass. While in the bottom part of the borehole create and maintain a pressure greater than the pressure in the wellbore. 1 Il.

The present invention relates to mining, in particular to a method of limiting the inflow of radon contained in the array of rocks in the work of excavation.

There is a method of degassing reservoir that includes drilling in the rock mass and the pumping of radon coming from the rock mass (see “Guide to underground coal mines”. - M.: Nedra, 1975, S. 7-8; 19-22).

The disadvantage of this method is that the creation of a zone of vacuum in the well and the rock surrounding it stimulates the flow of radon from remote areas of the mountains. In addition, due to the presence of cracks in the mountain massif of the people, working in development.

The closest together of existing signs to the claimed is a method of reducing the inflow of radon in mining, including drilling of the mine workings in the rock mass surrounding the excavation and pumping of radon entering the well from the rock mass. Before release into the atmosphere of air contaminated with radon, is passed through the adsorber with the sorbent (see “Methods of ensuring radiation safety in exploration and mining of uranium ores”. - M.: Energoatomizdat, 1994, S. 167).

The disadvantage of this method is the necessity of drilling a large number of wells for safe communication with them cracks array.

The present invention is to provide a method for limiting the inflow of radon in the mine workings from an array of surrounding rocks, providing a high reduction efficiency receipt of radon in the work of excavation.

The problem is solved by creating a way to limit the inflow of radon in mining, including drilling of mining in the surrounding rock mass and the pumping of radon entering into the wells of the array of rocks. Honors reviewee the pressure in the wellbore.

The creation of a zone of high pressure in the bottom hole of the well and the rock provides a deformation of radon contained in the array of rocks in the deeper layers of the mountain massif, which significantly reduces the flow of radon in the mine workings through the cracks in the mountain, passing well.

The method is illustrated in the drawing, which depicts the implementation of the method.

The diagram shows excavation 1, the surrounding rock mass 2, chaps 3, well 4, separating the bottom part of the borehole from the trunk sealed jumper 5, a compressor 6, is in communication with the bottom part of the borehole, and the vacuum pump 7 is communicated with the well bore 4, pipe to exhaust contaminated air 8.

The dotted arrow shows the direction of movement of polluted air, solid - friendly.

The method is as follows: hole 1 is divided by the tight jumper 5 into two parts - the bottom and the trunk (from the bottom of the site to the mouth). The compressor 6 is pumped into the wellbore portion of the well 4 by a special pipe clean air under high pressure. From the bottom part of the air is distributed over the 3 cracks in the mountain array 2, increasing the pressure and thereby creating a region is upline on him radon from the depth of the array. Under high pressure, the air begins to move through fractures 3 from the area of high pressure to areas of low pressure in the depth of the rock mass 2 and towards formulating 1. In order to reduce the amount of polluted air coming into generating 1, bypassing the wellbore 4, if the crack 3 communicates with mining output 1 and the well bore 4 barrel vacuum pump 7, a vacuum. Pumped vacuum pump 7 contaminated air through a special pipe 8 is assigned to the desired length.

The proposed method is compared with the known means of limiting the inflow of radon in the work of excavation provides greater efficiency reduction of receipt of radon in the mine workings at the expense of forcing radon contained in the array of rocks in the deeper layers of the array.

Claims

A method of restricting the inflow of radon in mining, including drilling of mining in the surrounding rock mass and pumping radon, through wells, characterized in that in the bottom part of the borehole create and maintain a pressure greater than the pressure in the wellbore.

 

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FIELD: mining industry.

SUBSTANCE: pipeline has sections made in form of hermetically interconnected outer and inner covers, mounted with space relatively to each other, and main ventilator. On different ends of pipeline flow meter and additional ventilator are mounted, the latter having adjustable characteristics and being connected to inter-pipe space by branch pipe. In inner cover apertures are made placed along radius and along length of cover. Air comes from apertures to air channel and forms additional air flow near walls of inner cover, which lowers or heightens aerodynamic resistance of ventilation pipeline.

EFFECT: higher efficiency, higher safety, lesser costs.

2 dwg

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