Shield for extraction of thick flat seams with the release of coal

 

The invention relates to mining and is aimed at improving the safety and efficiency of works by softening the underlay or the interlayer thickness and coal production, as well as increasing the reliability of a design lining. The section consists of interconnected supporting and exhaust parts. The supporting part comprises a base U-shaped form, the hydraulic jacks on top of the buildings which secures the canister, which represents an alignment structure for adjusting the position of the overlap of the exhaust parts. The overlap of the supporting part of the section is a rigid frame having guides inside the cavity face of salivates and dammed retractable shield, which are operated by hydraulic jacks. On the top of the ceiling supporting parts are loosening knives. The final part consists of the base of the T-shaped form, which is connected to the base supporting part of the hydraulic cylinder along the axis of symmetry, legs, arched ceiling, which front edge is always on the guides of the box. In the ceiling there is a window (hatch) for the production of coal. 1 Il.

The invention otnosilosj coal seams with the release of coal underlay or the interlayer thickness.

Known mechanized shoring for excavation thick layers pocwoznynm face (as the USSR №826006, IPC E 21 D 23/00, 1976). contains linked sections of the upper and lower ledges.

The disadvantage of this lining is that work in the pit one ledge cannot be independent from the work of culling another ledge.

Closest to the technical nature of the proposed lining is mechanized shoring for excavation of thick layers with the release of coal (SU 1190055, IPC E 21 D 23/00, 1984), includes a base with a hydraulic cylinder movement, the hydraulic jacks, fence, hinge associated with overlapping, made in the form of a frame with an outlet opening and a hinged tray hydraulic cylinder control that supports the visor.

The disadvantage of this lining is stiff enough overlap.

The objective of the invention is to increase safety and efficiency of works by softening the underlay or the interlayer thickness and coal production, as well as increasing the reliability of a design lining.

The invention consists in the following. Shield for extraction of thick flat seams with the release of coal consists of interconnected supporting and exhaust parts, cocoadialog design guides for adjusting the position of the overlap of the exhaust parts overlap the supporting part of the section, representing a rigid frame having guides inside the cavity face of salivates and dammed retractable shield, which are controlled by the hydraulic Jack, loosening blades arranged on the ceiling above, the final part consists of the base of the T-shaped form, which is connected to the base supporting part of the hydraulic cylinder along the axis of symmetry, legs, arched ceiling, which front edge is always attached on the guide case, there is overlap window (hatch) for the production of coal.

The figure schematically shows the proposed posts after shifting the supporting part of the section.

The shield has a base 1 supporting parts, hydraulic jacks, shifting 2 supporting part, the hydraulic jacks 3 supporting part, the case 4, the overlap of the 5 supporting part, loosening the blades 6, the downhole salivating 7, obstruction retractable shield 8, a base 9 of the outlet part, gidrotartrat shifting 10 final part, the hydraulic jacks 11 exhaust side, an arched ceiling 12 of the outlet part, Luke 13 for the production of coal, tray (telescopic chute) 14, gidrotartrat 15 management tray, samovydvizheniya flaps 16, agreedwith 22 dammed pipeline.

Shield for extraction of thick flat seams with the release of coal consists of interconnected supporting and exhaust parts, consisting of a base 1 a-shaped, two hydraulic cylinders 2, shifting, four legs 3, on the upper part of the body which is attached to the case 4, which guides the design, the overlap of the 5 supporting part of the section with loosening blades 6 arranged on the top of the ceiling 5, a rigid frame having guides inside the cavity face of salivates 7 and dammed retractable shield 8, the final part consists of the base 9 of the T-shaped which is connected to the base 1 supports a part of the hydraulic cylinder 10 along the axis of symmetry, the two legs 11, the arcuate overlapping 12, which front edge is always adjacent to the guiding canister 4, the arcuate overlapping 12 has a window (hatch) 13 for the production of coal.

The principle of operation supports the following. Powerful coal seam, consisting of a shifting layer 27 and the underlay (interlayer) column 28, worked out one layer with the release of the overlying strata. Longwall face shifting layer have the soil layer and equip sectional mechanized support, the coal from the bottom of the array along the length and width of the slash-and-burn layer 27, in this issue of coal is not produced. After the harvester on the width of the removed strip is moved to the plane of the bottom supporting part of the shield. While loosening the knives cut in the underlay (interlayer) coal thickness, thereby giving greater stability of the lining, as well as razobratsya overlying column. The upper part of the loosening of the knives is made of metal of high strength. The final part of the section does not move. Rear (dammed) retractable shield 8 is pulled Jack 24 in overlapping 5 supporting part of the section. With the help of hydraulic jacks 15 opens the shutter main hatch 13 and coal underlay or interlayer thickness 28 is produced by a telescopic chute 14 at the dam conveyor 26. Due to the reciprocating movements of the rear retractable shield 8 is additional crushing of coal produced strata and squeezing them in Luke 13. The outermost part of the retractable shield should be made of highly durable metal. At the end of the production of coal the main hatch 13 is blocked, is the shifting of the final part of the section, and followed by the release of coal directly on the dam conveyor 26 from the window, which is formed by the retraction of the gate 19 of the movable part of the emission lining in certain geological conditions, some options stope, such as power shifting layer, the capacity of underlay or interlayer thickness, the step of release can be adjusted.

Thus, the proposed shield section for excavation thick flat seams with the release of coal enables very actively influence the overlying coal thickness due to the unconventional design features lining, and energy of rock pressure. It also provides safety for the production of coal by samovydvizheniya shields that, when the shifting of the supporting part of the section are pulled out of the guides of the arcuate cavities fencing final part of the section and overlapping the coupling gaps. The stiffness of overlapping final part of the section is provided due to its curved shape.

Claims

Shield for extraction of thick flat seams with the release of coal, consisting of interconnected supporting and exhaust parts, consisting of a base supporting part of the U-shaped legs supporting part, the upper part of the buildings which secures the case, representing the guiding structure for adjusting the position of the overlap of the exhaust casti face of salivates and dammed retractable shield, which are controlled by the hydraulic Jack, loosening the knives are on the overlap of the supporting part at the top, the final part consists of the base of the T-shaped form, which is connected to the base supporting part of the hydraulic cylinder along the axis of symmetry, legs, arched ceiling, which front edge is always on the guides of the case, there is overlap window (hatch) for the production of coal.



 

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