The method of protection against ergonomically coal seam at its underground mining

 

(57) Abstract:

The invention relates to the mining industry. The method of protection against ergonomically coal seam at its underground mining is that of the field preparatory drift and precinct crosscuts to approach the lava drilled fan holes in the side of the rock out of the hole bottoms in a checkerboard pattern to the soil formation in the area of the conveyor line, while fans of the wells of the election crosscuts have on both sides of the production, and field drift only on the side seam of coal, and then in the same row in the well pump for air overpressure formation of coal, and from another series sucked off radon. With the approach of the lava for 3 to 5 m to the bottom hole air from all wells air reservoir through the cracks of the zone of maximum extraction of coal and serves the air holes in the bottom space to the passage of the lava. When the exhaust gas at the beginning of the wells are installing fabric filters to capture particles decay of radon and subsequent disposal of filters. As a result, radionavigation continuously neutralized in most parts of the reservoir prior to the extraction of coal and its branch, which improves the safety and reduces the impact of the development of OSISA to the mining industry, namely, the protection ergonomically coal seam at its underground mining and the environment.

There is a method of protection from ergonomically from the broken rock mass using irrigation water and solutions [1].

The disadvantage of this method is the lack of protective equipment to reduce ergonomically from an array coal seam and the side of the rocks.

There is a method of protection from ergonomically by coating the sides of preparatory workings of film and bitumen [2]. The disadvantage of this method is the lack of protection from ergonomically in Stopes.

The closest technical solution method is protection from ergonomically with the intensification of ventilation [3]. The disadvantage of this method is the lack of ventilation to approach the lava.

The invention consists in that in the method of protection against ergonomically coal seam at its underground production from the field preparatory drift and precinct crosscuts to approach the lava drilled fan holes out of the bottom hole in a checkerboard pattern to the soil formation in the area of the conveyor line, while fans of the wells of the election crosscuts have on both sides of the parallel Oistamo slaughter, turn into a well pump for air overpressure coal or create negative pressure for suction radon, then when you approach the lava for 3 to 5 m to the bottom hole air from all wells air reservoir through the cracks of the zone of maximum extraction of coal and serves the air holes in the bottom space of the lava. When the exhaust gas at the beginning of the wells are installing fabric filters for suspended particles of radon decays with subsequent disposal of filters.

The location of the bottom hole on the soil layer in a checkerboard pattern provides each well in retaining (or unloading) number availability in the context of its two retaining (or unloading) wells and four suction (or retaining) wells, enhancing the efficiency of radon release.

Start airing (washout of radon) from the reservoir, coinciding with the appearance of cracks in the corner in the zone of maximum extraction 3 - 5 m from the longwall face, provides a complete collapse of the discharge of radon (which is equal to time 180 min) from the array in the separation of coal in the face.

As a result, radionavigation continuously neutralized in most parts of the reservoir prior to the extraction of coal in his division, which significantly increases safety and reduces in from the roof and floor of the reservoir, it also neutralized in this way.

In Fig. 1 shows a section through the dip in the lower part of the extraction field; Fig. 2 is a plan of the extraction field, section 1-1; Fig. 3 - section field along strike, the cross section II-II; Fig. 4 is a top view of the inclined section of the site through the parallel production; field drift and conveyor openings, the cross section III-III; Fig. 5 - site And with the site plan.

The method is as follows.

In the preparation of the extraction field passed field haulage drift 1, conveyor openings 2, precinct crosscut 3 and Hezeki 4. From field drift and precinct crosscuts in the roof of the mine workings prior to the beginning of the treatment works are drilling boreholes in the form of fans, and appropriate their faces 5 to the soil reservoir 6. In the soil layer, the hole bottoms are staggered. In precinct crosscut fan 7 are located on both sides of the production, in the field haulage roadway on one side of 8 in the direction of the conveyor line. In different rows of wells parallel Oistamo slaughter 9, creating one row or layer of air, the number 10, or discharge, number 11. The bore 12 in the retaining row, as shown in Fig. 5, surrounded by two artesian wells and four suction. Soot 14 wells can be more that is, the zone can cross each other. Therefore, the distance between the fans 15 depends on area wells. The filter 16 with particles decay of radon is placed at the beginning of the wells.

Sources of information

1. Bykhov A. C. Hygienic issues in underground mining of uranium ore. - M: Medgiz, 1963. C. 284-289.

2. Bykhov A. C., N. Chesnokov.And., Pokrovsky, S. S. the Experience of dealing with radon in the conduct of mining operations. - M.: Atomizdat, 1969, S. 188-194.

3. Popov, P. and other Features of the development of deposits of radioactive ores. - M.: Atomizdat, 1964, S. 205-210.

1. The method of protection against ergonomically coal seam at its underground mining, including field development workings, the injection of air for ventilation, characterized in that the field of preparatory drift and precinct crosscuts to approach the lava drilled fan holes out of the bottom hole in a checkerboard pattern to the soil formation in the area of the conveyor line, while fans of the wells of the election crosscuts have on both sides of this generation, and field drift - only on the side of the conveyor line, then the well pump for air overpressure coal or create razryivayu layer through cracks in the zone of maximum annealing coal and serves the air holes in the bottom space of lava.

2. The method according to p. 1, characterized in that when the exhaust gas at the beginning of the wells are installing fabric filters to capture particles of radon decays with subsequent disposal of filters.

 

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