SU912935A1 - Method of mining thick sloping coal beds - Google Patents

Description

(54) METHOD FOR DEVELOPING A CUTTING ROLLED COAL STRAYS

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The invention relates to the mining industry and can be used in the development of powerful steep coal seams with hard-to-break roofing rocks.

There is a method of developing powerful steep coal seams, which includes carrying out ventilation and transport drifts, furnaces between these shchtrek and the formation of the reservoir columns in the fall with the use of shield ceilings and laying of the open space 1.

However, this method is characterized by a significant consumption of backfill material.

There is also known a method of developing high-power steep coal seams with pillars in a fall with changing panel board ceilings, including holding ventilation and transport pits, passing furnaces between them, connecting extreme adjacent furnaces of two extraction pillars by ventilator slumps and sequential development of columns 2.

However, this method is characterized by a lack of efficacy in the development of seams with hard-to-reach roofs.

Li.e, ib of the invention improves the efficiency of development of reservoirs with tr-well-ridged roof rocks.

Postav. Enna goal is achieved. cht1 vent. or giyininy sbёk worked over) hundred. 5 ba to the roof ii / iriCT;) n.iacTa is carried out, from the furnace of the column to be processed, connected to the ventilation sludge of the spent column, and from the vent to the roof rocks of a well bore of equal length within

, Q of the roof of the reservoir, after which the wells drilled from the specified furnace are strengthened by placing in Hii.x within the limits of the roof of the reservoir of the armature and nodachi of the bonding material, and in the wells drilled from the orts, charges of explosive .

t5 which then explode.

FIG. I presents a mine management scheme; in fig. 2 is a layout of wells.

The method is carried out in a common manner.

A powerful, steep coal seam with hard-to-break roofing rocks is worked off with column 1 and 1 with a fall, with the replacement of shield ceilings 2. When preparing the columns, ventilation is carried out) 3 and external 4 drifts. Furnaces and furnaces are conducted between the drifts. Extreme adjacent furnaces of two excavation columns are connected by ventilation slumps 6. The columns are worked out sequentially, for example, using drilling and blasting, with coal passing through the furnaces to the transport drift. In order to prevent the impact of dynamic phenomena from freezing and collapsing of roof rocks, cleanup works from ventilation failures 7 of spent column 8 to the roof of the reservoir lead the orts 9. From the furnace 10 to be worked out column 1 connected to the ventilation bends 7, and from orts 9 in the rocks of the roof we drill 11 and shch12 of equal length within the roof of the seam. Then, wells 11, drilled from pepps 10, are reinforced by placing reinforcements 13, for example anchors, within the roof, and supplying the bonding material, and in wells 12, drilled from orts 9, charges 14 are placed. which then explode. A series of reinforced and reinforced wells 11 reduces the impact of the blast wave on the coal mass of the column 1 to be refined. The armature 13 in the boreholes 1 is placed only within the roof rocks of the reservoir for the subsequent non-refining of the column 1.

The proposed method will improve the efficiency of the development of powerful steep coal seams with hard-to-break rocks of the roof.

Claims (2)

1. USSR Author's Certificate No. 93415, cl. E 21 C 41/04, 1950. 2. Limdenau N..I. The main technical directions of development of the Kuznetsk coal basin in 1959-1965. "Coal. 1959, n ° 8, p. 13-16. 7 H / f3