SU853106A1 - Method of erecting a man-made pillar - Google Patents

Description

The invention relates to the mining industry and can be used in the development of powerful steep coal seams.

There is a method of construction of the pillar in the development of deposits of minerals, including the contouring of the mineral block, bypassing it into the developed space of the lower floor and filling the developed space of the block with a collapsed rock of the upper floor 1.

However, the backfill massif formed in this way has a large voidness, low insulating properties. In addition, the complexity of preparing the block for lowering is high.

There is a method of erecting an artificial pillar in the development of powerful steep coal seams, which includes carrying out ventilation and transport shtrak, conducting a slope, forming a ceiling at the level of the ventilation drift, delineating the coal block by separating it from cutting rocks from side rocks and an array of coal seam, sequential excavation block at the level of the transport drift by hydraulic monitors and feed into the goaf, formed when the block is lowered, bookmarks under ceiling protection 2.

However, this method is not effective enough and is characterized by low

5 insulation and mechanical properties of the formed pillar.

The purpose of the invention is to increase the efficiency of the construction of the pillar and to improve the insulation and mechanical properties

10 last.

This is achieved by the fact that a spiral development is carried out along the contour of the block, the latter is knocked down with a ramp with sboys, and the cutting slots pass from the spiral

15 generation, in this case, after the block has been worked out and the gasped-in space has been filled with a filling, the filling mass is injected with an aqueous binder solution by means of the uprisings; in each pass, the injection of the backfill array is produced by an upward flow of the solution with water being drained through the top for the gate; height of entry is taken as a multiple step of the spiral development.

FIG. 1 shows the block preparation scheme; in fig. 2 shows section A-A in FIG. one; in fig. 3 shows the scheme of processing the block; in fig. 4 shows a cut

BB in FIG. 3; in fig. 5 shows the hardening scheme of the backfill array.

The method is as follows. When developing a powerful steep coal seam at the level of the ventilation drift 1, a transversely inclined layer 2 is worked out. On the soil of the layer an uncoupler 3 is placed, which is attached to the soil of the layer by anchors 4. Then the transversely inclined layer is laid with a hardened tab,

From the transport accumulating gauge 5, passed under a slope of not less than 0.05-0.07, the mechanohydraulic harvester along the contour of the block passes through the spiral generation 6 from the transport to the ventilation horizon. From the spiral production 6 in the receding order, beginning from the upper turn of the spiral, the jetting machines contour the block by cutting the cutting slots 7 in contact with the lateral rocks and the massif, the coal of the formation. The pitch of the helix is chosen equal to the working range of the jet of the jetting machine. Spiral development is knocked down with connections 8 with a ramp 9. Shucks are equipped with bridges 10 equipped with branch pipes with stop valves.

Hydraulic monitors 11, which are stationary in the development of the transport horizon, destroy the lowering unit in its lower part. As the block is lowered into the mined-in space, a bookmark is fed from the ventilation drift.

After the block has been completely worked out and the cavity has been laid out with the iol of the developed space, the backfill array 12 is hardened by injecting an aqueous binder solution into it. The solution is injected through the pipeline 13 stopovers for the uprising. The height of entry is taken as a multiple step of the spiral development. In each entry, the solution is fed through the lower coupling, and the clarified water is discharged through the upper coupling through pipeline 14.

This method will improve the efficiency of the construction of the pillar and improve

insulation and mechanical properties of the latter.

Claims (3)

1. The method of erecting an artificial pillar in the development of powerful steep coal seams, including carrying out ventilation and transport drifts, holding a slope, forming a ceiling at the level of the ventilation drift, delineating the coal block by separating it from cutting rocks from side rocks and an array of coal seams, consistent The block at the level of the transport drift is equipped with hydraulic monitors and feeds into the worked-out space formed when the block is lowered, bookmarks under the protection of the ceiling, characterized in that in order to increase the efficiency of erection of the pillar and to improve the insulation and mechanical properties of the latter, spiral development is carried out along the contour of the block, the latter is knocked down with a ramp, and cut-off slits pass from the spiral generation, while after working the block and filling the developed space with a tab injection of the backfill array with an aqueous binder solution through the uprisings. 2. A method according to claim 1, characterized in that, in each entry, the injection of the backfill array is produced by an upward flow of the solution with diversion of water through the top for this entry. 3. The method according to claim 1, characterized in that the height of the stoppers is taken as a multiple step of the spiral development. Sources of information taken into account in the examination 1. USSR Author's Certificate No. 314902, cl. E 21 C 41/06, 1971. 2. Gorbachev, T.F., et al. Development of powerful steep seams by lowering blocks with hydrothromy. - Lime Siberian Branch of the Academy of Sciences of the USSR, 1961, No. 9, p. 13-20. , H H / / 1рс / г.5