Method of sublevel working of steep seams with sandstowing

FIELD: mining.

SUBSTANCE: invention relates to mining, particularly, to sublevel working with sandstowing. Proposed method comprises working the block by odd and even sublevels in ascending order by counter short mining faces vented by all-mine drawdown. First, subdrifts and drops are worked. Seam is worked by counter short mining faces from flank slopes to central slope with direct-flow venting in advance preparation and working of odd sublevels. Mined-out area is filled with solid stowing while even sublevels between odd mined-out sublevels are filled with common stowing. In working, former vent heading is used as a belt heading.

EFFECT: higher safety and efficiency.

3 dwg

 

The invention relates to the mining industry and can be used in the development of steep seams mined-out space.

There is a method of testing a steep seams inclined layers with the notch of the layers in ascending order strips along strike with hydraulic mined-out space (Appcracks. The technology of mining. M.: Nedra, 1985, with 259-363). Excavation of coal is produced by drilling and blasting operations. Cleaning the face is a lava (strip) with a length of 10-15 m, located on the decline. The lava from the usual bottom lining, then in the mined-out area is served hydraulic tab.

The main disadvantages of this technology include the fact that the pair stope with ventilation drift created dangerous working conditions (a large concentration of methane and the formation of wood thrown coal).

These disadvantages are eliminated in the other closest to the claimed method (Patent for invention №2283431; application 28.04.05; publ. 10.09.06 BEEP No. 25). Excavation of coal here is mechanical and hydraulic methods with gravity and cast hardening mined-out space.

The disadvantages of the technology are the following:

complex ventilation faces; a large amount of preparatory work; low concentration mountain R the bot on the prepared excavation site; low quality mineral due to the hydraulic conditions of the coal.

The objective of the invention is to provide such a method of designing cool layer, which improves the working conditions of miners, can improve safety and productivity, reduce the complexity and cost of coal.

In the way sublevel development of steep seams mined-out space, including the development of the mining of the area even and odd podatkami in ascending order counter short treatment faces ventilated through mine depression, as well as a preliminary sublevel drifts and slopes, the refinement of the reservoir are opposing short treatment faces from the flank slopes to the Central ventilation on the RAM scheme and advanced training and development of odd podathey, mined-out space which is filled hardening bookmark and leave even potatah between exhaust odd, stope fill a normal tab, and when they are practicing the former airway is odd substage used as the conveyor.

The method is illustrated in the drawings, in which figure 1 is a diagram of the preparation and of the mining area with longwall mining and preparation the openings; figure 2 - a section I-I in figure 1; figure 3 is a section II-II in figure 1.

Figure 1-3 shows the flow chart of extraction of coal reciprocal treatment faces with separate ventilation and mined-out space.

Excavation of land for ventilation and haulage horizons opened crosscut 1, 2, 3, 4, 5, 6. Then spend the flanking slopes 7, 8 and the Central ramp 9. Then hold the vent 10 and opening 11 drifts.

For testing the first odd substage 12 hold the vent passage 13. For testing the second odd substage 14 spend conveyor 15 and the vent 16 drifts. For testing the third odd substage 17 also perform the conveyor 18 and the vent 19 drifts.

When developing the first even-numbered substage 20 is used as a conveyor drift former ventilation passage 13, and when developing the second even-numbered substage 21 uses the former airway is 16 and when developing the third even substage 22 uses the roadway 19.

Goaf odd podathey laid hardening bookmark, and even normal. To save Central Stingray leave the pillar 23.

When a failover even podathey ventilation passage 24 is constructed and is maintained until full testing substage 20, and then is filled with hardening bookmark. Flanking the kata 7, 8 are filled with a tab as testing even podathey 20, 21, 22, and the Central 9 after full testing of the site.

The method of designing cool layer is as follows.

Before treatment works from crosscut 1, 2, 3, 4, 5, 6 are flanking rays 7, 8 and the Central ramp 9. Then there is the main passage 11 and the ventilation passage 13 for testing of odd substage 12. Practicing odd substage is from the flank rays 7, 8 Central 9, leaving the vent passage 13. At the same time training and practicing the following odd podathey 14, 17. As their testing begins practicing even podathey 20, 21, 22.

When a failover even podathey as belt entries used by the former ventilation drifts odd podathey 13, 16, 19, and ventilation drifts 24, 25 are constructed in filling the array.

All treatment faces ventilated through mine depression on the RAM scheme, and an odd poletai additionally use podsobirayu a stream of air.

Fresh air when working out even podathey supplied from main aquifer in the Central SKAT 9, and then on the conveyor drifts and, washing the face, goes to provisionally reserve in the developed space ventilation drifts 24, 25. Ventilation drifts outgoing stream of air f is angulum slopes 7, 8 goes to the vent horizon.

Ventilation drifts 24, 25 even podathey 20, 21 are filled hardening bookmark after a failover substage and here are filled with tab flanking rays 7, 8.

To save the Central slope 9 leave pillars of coal 23. Possible beztselikovuju scheme testing strips, known on existing technology, where opesuse scat built in filling the array.

The way sublevel development of steep seams mined-out space, including the development of the mining of the area even and odd podatkami in ascending order counter short treatment faces, ventilated at the expense of mine depression, as well as a preliminary sublevel drifts and rays, characterized in that the refinement of the reservoir are opposing short treatment faces from the flank slopes to the Central ventilation on the RAM scheme and advanced training, and working odd podathey, mined-out space which is filled hardening bookmark and leave even potatah between exhaust odd, stope fill a normal tab, and when they are practicing the former airway is odd substage used as a conveyor.



 

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