SU1250649A1 - Shield set for thick steep coal beds - Google Patents

Description

The invention relates to the mining industry and can be used in the development of powerful steeply inclined coal seams by underground mining with dredging coal by long pillars along the fall.

The purpose of the invention is to increase the efficiency of the vibrators and to protect the 1-CYTIC overlap from the effects of vibration forces.

FIG. 1 shows schematically a complex, side view; in fig. 2 is a view A of FIG. one; in fig. 3 shows a section BB in FIG. 2; in fig. A - section BB in FIG. 3

The complex contains shield lining 1 konveyorostrug 2, suspended from lining on the telescopic levers 3 and hydraulic jacks Kachan 4, and the demolition knives 5, installed under the shield cover 6 at the side of the bed.

Shield support 1 contains shield cover 6, assembled according to a non-sectional scheme from support beams 7, suspension ball 8 and timbers of edged nakatnik 9, assembled by themselves 10 of channels 11, brackets 12 and overlays 13. Racks 14 are connected to support beams 7, 15 and skis 16, 17. Suspension beams 8, located 4.5-5 m above and resting on skis 17, hang the conveyor belt 2 on the telescopic arms 3 and the hydraulic jacks of the swing 4.

Each jacking knife 5 is made in the form of an L-shaped beam having a wedge blade 18 and a support for installing the electric vibrator 20

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directional action. The jacking knife is suspended from the metal beams 7 and 8 of the panel overlap on the grippers 21 and 22 and between them are mounted the cassettes 23 of two plates with the rollers 24 between them.

The complex works as follows.

The coal is removed by separate ribbons. Initially, the conveyor belt 2 produces coal at the bottom of the clearing wall, about 25, and then in section 26 at the top of the bottom. At the same time, the conveyor belt is retracted from the bottom, and electric vibrators 20 are activated, which oscillate in the direction from the soil to the roof, the impact blades 5. The impact blades, under the influence of vibration forces and the weight of the collapsed rocks, are inserted into the coal massif by means of wedge blades 18 and the supporting pillars are cleaved in section 27. Simultaneously with the breaking of supporting pillars 27, the entire shield complex is slowly lowered to the stop of the skis 16 in the coal massif. After planting the complex and stripping, the next tape will start to be dredged. After the excavation pole has been worked out for the entire height of the floor, a temporary wooden lining is installed under the panel cover and all metal equipment is removed (conveyor belt, metal levers, swing hydraulic jacks, skis, distance and slanting jacks, jacks).

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Editor M.Nedoluzhenko

Compiled by A. Shestimir

Tehred M. Khodanich Proofreader S. Shekmar

Order 4383/24 Circulation 470Subscription

VNIIPI USSR State Committee

Inventions n discoveries 113035, Moscow, Zh-35, Raushsk nab. 4/5

Production and printing company, Uzhgorod, Projecto st., 4

FIG 4

Claims (1)

SHIELD COMPLEX FOR POWERFUL STEEL-TILTING COAL LAYERS, including shield overlap, racks, skis, conveyor belts with devices for its suspension and jack knives with vibrators, suspended from beams of shield overlays, characterized in that, in order to increase the efficiency of the vibrators and protect the shield overlap from exposure forces of vibration, it is equipped with cassettes in the form of two plates with rollers between them, while the cassettes are placed between the beams of the shield floor and jack knives. - ω figure 1 directional action. The cutter knife is suspended from the metal beams 7 and 8 of the shield floor on the grippers 5 21 and 22 and between them are installed cassettes 23 of two plates with rollers 24 between them. The complex operates as follows. Coal mining is carried out in separate tapes. Initially, the conveyor with a circuit 2 is breaking coal in the lower part of the working face 25, 15 and then in the area 26 in the upper part of the face. In this case, the conveyor belt is diverted from the bottom and electric vibrators 20 are put into operation, which drive the blades 5. The blades are driven by the forces of vibration and the weight of the crushed rocks into the coal mass and they cleave the support pillars on site 27. Simultaneously with the breaking of the pillars 27, the entire shield complex is slowly lowered down to the ski 16 in the coal mass. After planting the complex and stripping the face, the extraction of the next coal strip will begin. After working out the excavation column to the full height of the floor, a temporary wooden lining is installed under the shield floor and all metal equipment is removed (conveyor belt, metal levers, swing jacks, skis, expansion and flyaway racks, jack knives).