Shield for extraction of thick flat seams with the release of coal
The invention relates to mining, and in particular to means mehanizirovannogo mounting faces when developing a powerful sloping coal seams. Provides improved security and efficiency of works by softening the underlay or the interlayer thickness and its production, and increase the reliability of a design lining. Essence: the section consists of interconnected protective supportive and exhaust parts. Fence-supporting portion comprises a base, props, fencing. The fence consists of a rigid frame having guides inside the cavity of the dammed retractable shield with a cutting insert, which is connected to the hydraulic cylinder. On the overlap of the fence-supporting portion at the top are loosening knives. The final part consists of the base, which is connected with the base of the fence-supporting portion of the hydraulic cylinder along the axis of symmetry, props, floors, which has a window for the production of coal. 1 Il.
The invention relates to mining, and in particular to means of mechanical fastening faces when developing a powerful plastic flat coal seams pocwoznynm face (as the USSR №826006, IPC E 21 D 23/00, 1976) that 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 protective supportive and exhaust parts, consisting of a base, props, fencing fencing-supporting part of the section, predcor, which is controlled by a hydraulic cylinder, loosening blades arranged on the ceiling above, the final part consists of the base, which is connected to the base of the fence-supporting portion of the hydraulic cylinder along the axis of symmetry, props, overlap, overlap has a window (hatch) for the production of coal.
The figure schematically shows the proposed posts after advancing guard-supporting part of the section.
The shield has a base 1 fence-supporting portion, the enclosure 2, the hydraulic jacks 3 fence-supporting portion, the overlap of the 4, salivating 5, hydropattern 6, loosening the knives 7, obstruction retractable shield 8 with a cutting insert, gidrotartrat control 9, the hydraulic Jack advancing guard-supporting part of the section 10, gidrotartrat belt 11 exhaust parts, the base 12 of the outlet part, the overlap of 13 final part of the hatch to release the hydraulic jacks 14 final part, the tray 15, the extension tray 16, a spring 17, gidrotartrat 18 management tray, enclosure 19, the movable part of the fence 20, gidrotartrat control of the movable part of the fence 21, the gate 22, gidrotartrat control gate 23, the yoke 24, gidrotartrat shifting 25 dam is provided between a protective supportive and exhaust parts, consisting of a base 1 fence-supporting portion, fence 2, representing a rigid frame having guides cavity dam retractable shield with a cutting insert, the legs 3 of the fence-supporting portion, floors 4, salivates 5, hydropattern 6, loosening of the knives 7, obstruction retractable shield 8 with a cutting insert, hydraulic cylinder control 9, hydraulic Jack advancing guard-supporting part of the section 10, the advancing hydraulic cylinder 11 exhaust parts, the base 12 of the outlet part, overlap 13 final part of the hatch to release the legs 14 of the outlet portion of the tray 15, the extension tray 16, springs 17, the hydraulic cylinder 18 management tray, fences 19, the movable part of the fence 20, hydraulic cylinder 21 control of the movable part of the fence, the gate 22, the hydraulic cylinder 23 of the control gate, the head plate 24, the hydraulic cylinder 25 advancing goaf pipeline.
The principle of operation supports the following. Powerful coal seam, consisting of a shifting layer 28 and the underlay (interlayer) column 29, worked out one layer with the release of the overlying strata. Longwall face shifting layer have the soil layer and equip sectional mechanized shoring, excavation harvester, face the and throughout the length and breadth of slash-and-burn layer 28, 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 of the fence-supporting portion 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 9 in overlapping 2 protective-supporting part of the section. With the help of hydraulic jacks 18 opens the shutter main hatch and coal underlay or interlayer thickness of 29 issued by the tray 15 on the dammed conveyor 26. Due to the reciprocating movements of the rear retractable shield 8 and the cutting insert is additional crushing of coal produced strata and squeezing them into the hatch. 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 closed, is shifting 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 drawing Sibe the During operation of the 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 due to the fact that between the parts of the section with no gaps. The stiffness of overlapping final part of the section is achieved due to its permanent location in the guide fence fence-supporting portion of the section.
Shield for extraction of thick flat seams with the release of coal consists of interconnected protective supportive and exhaust parts, consisting of a base, props, fencing fencing-supporting part of the section, representing a rigid frame having guides inside the cavity of the dammed retractable shield with a cutting insert, which is connected to the hydraulic cylinder, loosening knives, located in the overlapping protective supportive whose part of the hydraulic cylinder along the axis of symmetry, props, floors, which has a window for the production of coal.
SUBSTANCE: development method of thick coal beds with release of formation under the roof involves cutting of lower layer of the bed with mechanical complex, breaking of the formation under roof and its loading to conveyor. Formation under roof of coal bed is cut with thin hydraulic jets into strips which are broken under influence of ground pressure, and release of mined rock is performed through overlapping access holes of upper covering and side enclosure and loaded to conveyor via covered chutes. Powered support of complex includes base with advancing hydraulic jacks, cap with supply hydraulic jacks, upper covering with four hydraulic posts, side enclosure with supply hydraulic jacks and drag conveyor. Upper protective covering and side enclosure is made of two plates: upper fixed plate and lower movable plate; at that, in upper plates throughout their length and width there made are access holes for release of mined rock.
EFFECT: increasing excavation efficiency, reducing losses and coal ash content.
7 cl, 3 dwg
SUBSTANCE: facility for connecting sections of support with conveyor consists of bracket rigidly secured on linear section of conveyor and connected with support by means of vertical hinge; support in its turn is connected with vertical ribs of beam of powered roof support section by means of horizontal hinge; hydro-cartridge for control over linear section of conveyor in vertical plane is secured on face surface of support; plunger of hydro-cartridge interacts with beam of section of powered support; also run of hydro-cartridge for control over linear section of powered support in vertical plane exceeds value of support set-off relative to beam of section of support in vertical plane; facility also consists of share located on mining side of conveyor section. The horizontal hinge is connected with vertical ribs of the beam of the section of powered support by means of two coaxial slots made in vertical ribs; also each of slots in vertical plane on ends has rounding with chamfers, the top of the angle between which in each vertical slot is directed to support.
EFFECT: increased functionality of facility under conditions of dirtying due to less dirt ingress and due to self-cleaning capacity of slots during main process operations of facility.
SUBSTANCE: powered support for steep formations of average thickness consists of similar linear sections each of which has roof timber, hydraulic prop of stay brace, shoe, hardware compartment capsule, cave-in and bottom-hole enclosure, as well movement and correction mechanism. Stabilisation and correction mechanism is located on both sides of the hardware compartment capsule and consists of supporting screens and air pads inflating against side surfaces of capsules of neighbouring compartments.
EFFECT: improving serviceability of powered support and its stability and movement method.
2 cl, 3 dwg