SU1656125A1 - Method and device for mining thick gently sloping coal seams - Google Patents

Abstract

The invention relates to the mining industry and can be used in underground mining of thick flat coal seams. The purpose of the invention is to reduce the loss of coal and the volume of development workings during the mining of excavation pillars. For this, an extraction pole is contoured by a conveyor 20 1n- 15 1j 19 - - and n. About x and o Dwarfs to the ventilation drifts, a mounting furnace is conducted on the border of the pole, a cleaning complex is installed and cleaning works are carried out. At the same time, the ventilation drift is formed as the cleaning works are carried out in the previous column by keeping a part of the cross section of the conveyor drift above the coal ledge, and the coal ledge is removed when working the adjacent extraction column. The preservation of the ventilation drift is carried out by installing racks of high bearing capacity in the zones of forward and rear support pressure. To perform the method, a device is proposed which consists of end sections of the lining, fencing-supporting 12 and supporting 13 types with articulated canopies 15, 16 and linear sections of the lining; movement On the hinged-connected visors of the support sections 12 and 13 along their axis, the casing 20 is fixed by means of hinges along the axis from the side of the adjacent adjacent column. 2 sec. 14 C of the SP

Description

FIG. five

The invention relates to the mining industry and can be used in underground mining of thick flat coal seams.

The purpose of the invention is to reduce the loss of coal and the volume of preparatory workings during the development of excavation pillars

The essence of the method consists in the detouring of the first worked out extraction column by the ventilation and conveyor drifts. Subsequent excavation adjacent pillars are prepared by conducting a conveyor roadway with a cross-sectional cross section and preserving part of the cross section of the conveyor roadway of the previous column, which serves as a ventral one.

FIG. 1 shows the scheme of the pole, VI, in plan; in FIG. 2 - disconnected A-A in FIG. one; in fig. 3- section BB in FIG. one; on fi1. 4 shows a section B-B in FIG. one; in fig. 5 is a section of YYD in FIG. one; in fig. 6 is a section d-d in FIG. five.

The method is carried out as follows.

The extraction pole is contoured with conveyor 1 and vent 2 drifts. Moreover, the cross section of the ventilation drift 2 is part of the reused section of the conveyor drift of the previously used adjacent extraction column. The conveyor drift 1 is conducted by an access section with the location of the coal ledge 3 on the side of the coal of the adjacent excavation column. A conveyor belt, for example, is fastened with tops from a special profile or channel 4 with anchor bolts 5 and under the top to the coal ledge is installed on the side of the rack of the metal support and at a distance of 0.4-0.6 m from the edge of the ledge . a set of cut supports 7, which is reinforced at a distance I (forward reference pressure zone) in front of the clearing hole and h (unloading zone and back support pressure) behind the clearing blade in fixture 8 with a height of bearing capacity (for example, OKU cabinets).

Racks of high bearing capacity as they move the clearing slab are transferred from the zone of steady pressure (distance from the clearing blade h) to the zone of forward bearing rock pressure I. At the ignition head of the clearing slab, part of section 9 is extinguished from the side of the worked out extraction column held on the full thickness of the coal seam, and part, sections 10 above the coal ledge are retained for reuse

as a ventilation drift when mining the adjacent extraction column.

In the ventilation drift to the distance I (zone of forward pressure)

install racks of increased bearing capacity, which are relocated from the interface to the cleansing face as it moves; Stocks of coal D of the ledge near the soil of the plesta are removed during processing

adjacent pillar coal combine 11.

The method is carried out using a device (Fig. 5 and 6). In the device, including the lining 12 protective supporting ip 12 and lining 13

supporting type 13 with a swivel connection 14 peaks 15 and 15 lining, lining support for 1 g is made of two pairs of sections 17 and 18, the canopies and the bases of which are connected between the ppd piping, 19 moving rods, and charcally connecting kozryk shields the extremely supporting type 12 and supporting: type 13, along their axis from the side of the spent

the adjacent post is fixed by means of hinges to the casing 20, and the height of the sections of the support-type kregi is less than the height of the suppressive-supporting type to the height of the coal 1-ogc of the ledge

the bolster.

VoportCTBO works as follows.

The support of the supporting support sections 13 is removed. With the help of hydraulic jacks 19, the movements of section 13 push up to 3 distances of the width of the coal combine and burst, Then with the help of synchronously working hydrocomputer sections, protect the supporting support 12 and the hot jacks 19 to move the executive body of the coal combine to coal | where the chest and the chest are cleansed. After the passage of the coal miner throughout

the length of the cleaning face, it is cleaned. The coal miner was hacked again and another coal strip was broken. After moving the clearing intake to a distance equal to 3 widths of the coal combine pickup (free running of the hydraulic jacks of movement) again, the support sections 13 again and the cycle is repeated in the specified sequence,

Claims (1)

1. The method of developing powerful flat coal seams, including carrying out for the full length of the extraction column EentiQ oo NT x I