SU693027A1 - Front-end roof support units - Google Patents

Description

(54) FRONTAL UNIT

. I:

The invention relates to the coal mining industry, namely, equipment for coal mining along strike, preferably on steep seams of average power with remote control, up to the complete removal of people from the lava. The unit can also be successfully used for work in difficult geological conditions - with unstable soil and roof.

Known unit for excavation of coal on steep seams during the work on the fall. The unit consists of sections of the rod, the protective support lining and the plow executive body of the front-flank type 1 |.

Coal repulsed frontally along the entire length of the bottom and the flank formation is transported to the coal slope.

The disadvantage of the aggregate current is low production efficiency due to the large share of installation and disassembly costs and large losses on auxiliary processes due to the cyclical operation of the executive body, which simultaneously processes TcwibKo

and requiring constant lateral movement.

In addition, these units cannot work along the strike of the reservoir due to the lack of lateral stability means.

Another coal excavation unit is known, having a support consisting of sections comprising racks with shoes located inside a retractable base on which the base is fixed with guides of the actuator, made in the form of a telescopic wall, the fixed parts of which are connected to each other by means of clamps, and balancers connected to the fence (2.

The annular executive body with its incisal carriages processes the face-to-face with continuous frontal movement of the face-to-face.

Such an aggregate is the closest to the invention in its technical essence and the achieved result.

Such an execution of the unit does not provide reliable lateral stability of the lining sections, does not preclude the sliding down of the bedding. The purpose of the invention is to increase the lateral stability of the unit. This is achieved by the fact that the sliding bases of the sections are connected to the balancers by means of brackets, and to the fixed parts of the telescopic walls of the adjacent sections by means of braces, and have a wedge for interacting with the rack shoes. FIG. 1 shows the proposed unit, the cross section; in fig. 2 - becoming with lining; in fig. 3 — aggregate with top off (walls conventionally not shown); in fig. 4 - becoming and lining the unit, a perspective view; in fig. 5-6 - diagrams of the unit advancing (on the upper cams). The frontal unit consists of the executive body I, base 2, acting as a beam, and sections 3 of the support. The executive body 1 of the unit is made in the form of a frontal annular plow of ha, including a lamellar chain of 4c drives (not shown), incisal carriages 5 with cutters. 6. The actuator 1 is located on the lower 7 and upper 8 guides, each of which has a cylindrical 9 and a flat 10 parts. These parts of the guides 7 and 8 are covered by incisal carriages 5 fitted with grippers 11 and 12. Guides 7 and 8 mounted on telescopic walls .13 of stand 2. Walls 13 are mounted on each base 14 of base 2 or one, two, etc. In the opening 15 of each pull-out base 14, a removable wedge 16 is mounted on its lower coolant surface, a. Fastening elements 17 are provided on the upper end for reassembling the wedge. The fasteners can be symmetrically located in Opening 15, providing re-assembly of the wedges for working with the right and left sides. Walls .13 can be made rigid or telescopic, consisting of a fixed 18 and a movable one. 1-9 parts. . To the fixed part 18 of the wall 13, the lower guides 7 are fastened, and to the sliding part 19 the upper guides 8 and also the springs 20; covering rack 21 lining. - -; The bases 14 of base 2 are interconnected pivotally, forming a flat truss (beam) located parallel to the soil (and roof) of the formation. Walls 13 are hingedly connected with each other by stitches 22. Raskoski 23 are fixed to the fixed parts of the walls by one ends, and to the bases 14 of base 2 by other ends. Walls 13 are constricted by 22 and 23 by means of a space truss. The straps 22 can be made rigid or telescopic (screw or hydraulic). At the cusp end of base 14 is tough. plates 24 are fixed, on the lateral ends of which the brackets 25 are welded, interacting with the balancers 26 of the lining 3. The lining section 3 consists of racks 21, the lower part of which is connected to the shoes 27, and the upper part with the lugs 28 of the lining, and fencing 29, connected jointly with the tops 28 and balancers 26. Each section of the lining 3 communicates and interacts with the supporting base 14 with the help of balances 26 and brackets 25 rigidly fixed on the side walls of the shoes 27. The shoes 27 are provided with supporting elements located on both its sides m. To move the support section, the upper 30 and lower 31 hydraulic jacks are applied, which are hinged: to the sliding part 19 of the wall 13 and to the fence 29 for the upper jack; to the shoe 27 and the base 14 of the base 2 - for the bottom. The unit works as follows. The annular executive body 1 with its incisal carriages 5 processes the face of the face, removing the coal from its open surface with the continuous movement of the head on the face. The base 2 with telescopic walls 13 and guides 7 and 8 is fed by the upper 30 and lower 31 jacks pushing away from the uncovered sections of the lining 3. By re-selecting the moves of the jacks 30 and 31 the corresponding sections of the lining are unloaded and moved to the bottom by the same jacks during their reverse . The support for the jacks, which move the lining, is becoming 2. At the same time, by becoming able to move to the bottom, due to the work of the jacks of the adjacent sections. The order of operations for advancing a support section can be either grouped, when one third of all sections dispersed or sequential (with local control) are simultaneously remotely extended. The arrangement of the lining sections relative to each other at the same time can be either sawtooth (see Fig. 5, when combining the advancing of the lining and standing), or in one line, (see Fig. 6, when advancing the lining with the stands stopped). The lateral stability of the support sections during their advancement is ensured by the fact that the shoe 27 of the rack 21, when it is extended to the bottom, is supported by the supporting element on the lateral end of the base 14, the barrier 29 during the extension is supported through the balance bar 26 on the side bracket 25 of the base 14, and the upper The 28 ki also have a lateral support-spatial developed stav farm, for example, due to the support of the rack 21 on the springs 2U. At the end of the slide, the shoe 27 slides over the wedge 16 fixed to the end of the base 14 and rises thereto until the gap is completely selected, and between the upper support element and the base 14.

The choice of this gap provides a predetermined direction of movement to the face and prevents it from slipping along the dip of the reservoir,

Claims (2)

1. USSR author's certificate No. 210787, cl. E 21 C 27/32, 1966. 2.New in the domestic technology. - “Coal, 1975, No. 8, p. 52.. // r / J l )LTD