SU1550141A1 - Method of mining steep coal seams - Google Patents

Abstract

The invention relates to mining and is intended for the treatment of highly hazardous, spontaneous combustion hazardous and difficult to control roof steeply dipping coal seams. The goal is to increase the safety of processing self-igniting coals with light-breaking host rocks while preventing sudden outliers. For this purpose, floor field ventilation and haulage drifts are conducted, from which intermediate coal trains (PCs) open up the coal seam along the strike and divide it into blocks. Moreover, blocks on the uprising of the seam from the PC are contoured by wells, and reinforced concrete lining is erected above them in the said PCs. To prevent sudden outliers during drilling, the reservoir in the PC area is strengthened by feeding polymeric resins through the holes. The blocks are then treated through one counter jets of water. After processing each block in the developed space on the side of the haulage drift 5–10 mm above it, they form a barrier of fast-hardening material, and explosion-proof bridges are erected in the PC. In order to eliminate the possibility of spontaneous combustion of the formation from the air drift side, the developed space is filled with inert material. 1 hp ff.

Description

The invention relates to mining and can be used in the development of special highly dangerous, dangerous for spontaneous combustion and difficult to control the roof of steeply dipping coal seams.

The purpose of the invention is to increase the safety of mining of self-igniting coals with light-breaking host rocks while preventing sudden outliers.

The method is carried out as follows.

On drift and ventilation horizons in the rocks of the formation soil at a distance of not less than 10 m from it, field drifts occur (in this case, the stability of these workings

well above the workings covered in the roof, and, consequently, the cost of maintaining them will be smaller), of which the coal seam is opened by intermediate chests. In place of the seam erection reinforced concrete lining. In the upper part of the lining, a window with a size of 0.5 x XO, 5 m is left, through which a hole of at least 300 mm in diameter is washed out to the entire height of the floor with a KBG type installation hydraulically without exit to the ventilation drift. To prevent sudden outbursts during leaching of a well, a coal seam is strengthened in the region of the overburden by feeding at least 4 m of polymer resins through holes.

After the block has been contoured, the coal is excavated directly, which is produced by the same installation from top to bottom with radial strips up to 15 m wide, with the coal in the block being removed from right to left and from the other to left to right.

The unit control panel is located at least 200 m from the place of excavation.

Excavation of coal - deserted, roofing - spontaneous betrothal of rocks.

After excavation, coal for the entire height of the floor in the excavated space in the area of the haulage drift to a height of 5-10 m is supplied with a fast-hardening mixture, such as phosphogypsum, and explosion-proof bridges are erected in the intermediate quarters. To eliminate the possibility of spontaneous combustion of the formation, an inert mixture, such as carbon dioxide with water, is injected into the developed space.

In order to eliminate reinforced loadings on the coal massif from the collapse of the immediate roof, which can lead to the release of sudden outliers, the blocks are developed through

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five

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five

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five

one. After working out the odd ones proceed to the out & n even blocks.

The proposed method allows one to develop layers with a complex of negative signs: erosion hazard, danger of spontaneous combustion, and complexity of roofing, which are not currently being worked out, and to ensure labor safety due to deserted excavation and elimination of roof control works.

Claims (2)

1.Method of steeply dipping coal seams, including conducting floor field ventilation and haulage drifts, opening the formation along the strike and dividing it into blocks by intermediate cuts, hydraulic mining of coal blocks, characterized in that, in order to increase the safety of mining of self-igniting coal, it is easy - collapsing enclosing rocks while simultaneously preventing sudden outbursts, the blocks for reservoir uprising from intermediate cross-sections are contoured by wells and erected under them The reinforced concrete lining, and the blocks are driven through one opposing water jets, while during the drilling of wells, the reservoir in the area of crossheads is strengthened, then, after each block is worked out, 5–10 m above the drift drift side above it forms a barrier from the quick-hardening material, and from the side of the ventilation drift, the specified exhaust space is filled with inert material. 2. A method according to claim 1, characterized in that an explosion-proof jumper is formed in the intermediate cross-sections.