RU2079655C1 - Method of mining of series of flat-lying coal seams - Google Patents

Abstract

FIELD: coal mining. SUBSTANCE: driven after paneling of mine field are inclined shafts. Before extraction of the upper layer, inclined shafts are driven in the neighboring underlying seam for supply of fresh air into mine and they are connected by ventilation crosscuts with inclined shafts of mines seam, and each successive mined seam of the series is connected with ventilation crosscuts of neighboring underlying seam, and with neighboring overlying seam by means of haulage crosscuts. In addition, stage drifts are driven downgrade towards flank shaft. EFFECT: higher efficiency. 3 cl, 2 dwg

Description

 The invention relates to the mining industry and is intended for the development of suites of flat coal seams with access to the pumps.

 Known methods for developing a suite of shallow coal seams, including the sinking of vertical ventilation shafts, a ventilation crosshair at the lower boundary of the mine field and a transport crosshair at the boundary of the outcrops for pumps (USSR AS N 898069; 1065598 IPC E 21 C 41/04).

 The disadvantage of this method is the very large amount of mining and capital work to be performed before the start of treatment work on the layers of the suite.

 There is also a method of developing flat coal seams, including the sinking of inclined ventilation shafts, open-cut openings and flank shafts and the development of seams along strike or uprising (A.S.SSSR N 1452997 IPC E 21 C 41/04).

 The disadvantage of this method is that when fresh air is supplied and an outgoing stream is delivered from the mine through the mine, the possibility of an underground fire is high. Closest to the proposed one is a method of developing a suite of flat coal seams, including panel preparation of a mine field, sinking of inclined shafts, crosshairs and longline drifts (AS USSR N 1461931, IPC E 21 C 41/04, 1980).

 The disadvantage of this method is that vertical bends are used to supply air to the mine, passing through the rock before mining. And this sharply increases the volume of mining and capital work performed before the start of treatment works, which increases the cost of construction.

 The aim of the invention is to increase the safety of mining and reduce the volume of mining operations.

 In FIG. 1 shows a vertical pattern of opening a suite of shallow coal seams; FIG. 2 same top view.

 The method is as follows.

 The panel preparation of the mine field is accepted with the division of the panel into tiers.

 In the upper layer, Formations P1 from the day surface extend inclined trunks to the lower border of the panel. On one flank there are conveyor 1 and track 2 shafts, and not the opposite flank of the panel, flank barrel 3, designed to lower mechanized complexes into the shaft and at the same time be an emergency exit from the shaft. At the same time, ventilation inclined shafts 4 pass through formation P2 and are knocked down by a crosshitch 5 with a track shaft 2 of the upper formation. The panel of the worked-out upper layer is divided into tiers and in the upper tier there are tier drifts 8 and 9. The tier drifts pass with a slope towards the flank barrel. At the bottom of the panel there is a drainage drift 7.

 At the mouth of the shafts 4, fan units 10 are being constructed, and at the mouth of the trunk 2, a mine site 11 is organized. Near the sump section of the flank barrel 3, a pumping chamber 12 is constructed with drainage tanks. The development of formations P and tiers is carried out in descending order in succession with long columns along strike. Thus, in the work at any given moment there is one lava. Coal from the face is fed to the conveyor drift 9 and conveyor belts are fed to the conveyor barrel 1, through which conveyors are delivered to the mine site 11.

 During mining of the upper tier of the panel pass tier drift 13 for the underlying tier. The delivery of equipment and materials to the face is carried out along the inclined flank shaft 3, as well as along the inclined track shaft 2, and then along the preparatory workings equipped with ground or monorail roads. The descent and ascent of people is carried out by a monorail equipped in a conveyor inclined barrel 1. The delivery of people, materials and equipment along the flank inclined barrel 3 is carried out by end lifting.

 Fresh air is supplied to the mine by a fan 10 with heating in the cold season through ventilation shafts 4, passed through the underlying layer 12.

 A fresh stream along the crossover 5, trackway 2 and conveyor drift 9 is fed into the treatment face. The outgoing stream from the working face along the ventilation drift 8 is fed to the conveyor inclined shaft 1 and is discharged from the mine along it.

 By the end of the treatment work on the upper reservoir P1 on the underlying reservoir P2 passes the flank of the barrel, and on the reservoir P3 pass ventilation trunks 14 and knock them down with a ventilation pit 5 with ventilation trunks of the reservoir P2.

 Ventilation units from the mouth of the inclined shafts 4 are transferred to the mouths of the inclined shafts 14.

 In addition, the ventilation shaft 4 of the P2 formation is re-equipped for the conveyor belt and knocked down by a transport cross-ditch 6 with the conveyor barrel 1 of the P1 formation. Then, preparatory workings on the P2 formation are held, after which the treatment works begin in the upper tier Y1 of the P2 formation. At the same time, coal from the conveyor belts of the inclined conveyor barrel P2 is fed to the conveyors of the transport cross-link 6 and then conveyors along the trunk 1 of the reservoir P1, is delivered to the surface. Similarly, all underlying formations of the suite are worked out. Thus, during the development of each formation, the supply of fresh air to the working face is carried out along the underlying formation, which eliminates the occurrence of underground fires. Transport and ventilation crosshairs pass from formation P2 only to neighboring layers: transport to formation P1, and ventilation to formation P3.

 Similarly, each subsequent layer of the formation before mining is knocked down by piers only with neighboring layers, which ensures a sharp decrease in the volume of mining and capital rock work during the opening and preparation of the mine field.

Claims (3)

 1. A method of developing a suite of shallow coal seams, including panel preparation of a mine field, driving inclined shafts, crosshairs and longline drifts, characterized in that the inclined shafts pass through the adjacent underlying layer before working out each upper seam and bring them down with ventilation kvershlagami with inclined trunks of the worked-out formation, and each subsequent worked-out formation is brought down by a ventilation kerchag with an adjacent underlying formation.  2. The method according to claim 1, characterized in that the longline drifts pass with a slope towards the flank barrel.  3. The method according to claims 1 and 2, characterized in that the mine’s industrial site is equipped at the mouth of the inclined conveyor trunk of the upper formation.

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