SU1315618A1 - Power support unit - Google Patents

Abstract

The invention relates to mining, in particular, to devices for controlling rock pressure in CLEANING workings. The purpose of the invention is to increase the reliability and efficiency of the work of the lining by preventing irreversible deformations of the spacing hydro-posts (HS) during rare precipitations of a hard-to-collapse roof. For this purpose, the spacer HS 3 is made in the form of the inner 8 and outer 9 cylinders (C), which are telescopically interconnected, connected by a clamping device 10, and hydraulic rails on the jack 1 1. The latter has a housing that is movably connected to the lower part of the C 9, a sliding element and an elastic cylinder disposed between them. Inside C 8 and 9 is placed the jack 12 pre-thrust, pivotally connected with the sliding element. Through the rod through the nozzle, the jack 12 interacts with the upper part of the C 8. The jack body 11 is rigidly embedded in the base 1 of the lining, pivotally connected to the overlap 2 in the bottomhole part through GS 3, and in the zavalny through the levers 4 and the yoke 5. In the upper part, block 2 The hinged visor 7 is hinged at the same time. During abrupt lowering of the hard-to-collapsing roof, the C 8 and 9 are displaced relative to each other by the amount of displacement of the roof. This ensures the compliance of the lining and eliminates the destruction of HS 3. The resistance of the lining at the same time remains constant. 1 hp f-ly, 5 ill. (L ate O) 00 Fig 1

Description

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The invention relates to mining, in particular, to devices for controlling rock pressure in treatment works, and can be used in building mechanized supports for underground mining of stratal deposits of minerals with a hard-to-collapsing roof.

The aim of the invention is to increase the reliability and efficiency of the lining operation by preventing irreversible deformations of the hydro-girth racks during sharp precipitations of a roof that is hard to break.

Figure 1 is a schematic representation of a lining section with an extension stand; Figures 2 and 3 show the construction of the spacer stand with and without a hydraulic cylinder jack; Figures 4 and 5 show the construction of a hydraulic cylinder jack made at the base.

The mechanized lining section (Fig. 1) consists of a base 1, hingedly connected to the overlap 2 through the spacing hydroresistance 3 levers 4 and the yoke 5, g of the advancing idler 6. In the upper part of the overlap 2 the balancing visor 7 is hingedly fixed 7. The hydrostreader assembled from telescopically interconnected inner 8 "outer 9 cylinders with a clamping device 10, a hydraulic cylinder jack 11 and a jack 12 of preliminary expansion. The hydraulic cylinder jack 11 is made in the form of a housing 13 (FIG. 2), movably mounted on the lower end of the outer cylinder 9 and hinged on the base 1, and a sliding element 14 rigidly connected to the outer cylinder 9. Between the case 13 and the extendable element 14 An elastic cylinder Idroballon 15 is placed. A jack 12 is pre-thrashed (Fig. 2.3) located inside telescopically connected cylinders and pivotally connected by its lower end to the pull-out element 14 of a cylinder-mounted jack 1 1. At the upper end of the stem, with the help of a clamp, a nozzle 16 is fixed, made, for example, in the form of a truncated cone. Through the nozzle 16 jack 12 pre-thrust interacts with the inner cylinder 8 in its upper part, having a recess, made the same way as the nozzle 16, in the form of a truncated cone. For pre 56182

to prevent a significant deviation of the pre-thrust hydraulic jack from the longitudinal axis of the telescopic cylinders and to avoid landing

5 of the hydraulic cylinder jack on the inner 8 and outer 9 cylinders there are stops 17.

The clamping device consists of a housing 18 welded design

About (figure 2), rigidly fixed on the upper end of the outer cylinder 9, the spacer 19 in contact with the inner cylinder 8 on its outer surface, the vertical wedge 20,

 located between the cone 18. and the spacer 19 and the hydraulic jack 21 of the double-acting control, pivotally connected to the vertical wedge 20 and the outer cylinder 8.

0 Hydraulic jack 11 can be located in the base 1 (figure 4) of the lining section. At the same time, its body is rigidly embedded in the base 1 and divided by partitions 22 (Fig. 5) with respect to the longitudinal axis of the base into two parts, between which a movement jack 6 is placed. Sliding element 23 is made in the form of a yoke and pivotally.

 connected through the support 24 with the lower

an outer end of the cylinder 9. On the opposite side of the support 24, the jack 12 is prefixed to the hinge. Between the hull and

35, the sliding element 23 accommodates elastic hydroballoons 25; on the base 1 of the lining section, guides 26 with vertical grooves are rigidly fixed, and the sliding element 23

40 has eyelets 26 with holes. The fingers 27 are inserted into these vertical grooves and holes to direct the movement of the sliding element 23 and prevent it from jamming into

45 enclosure. This type of jack can be installed in the ceiling 2 lining.

The mechanized support section works in the following way.

When the working fluid is supplied from the precinct highway through the distributor into the piston cavity of the pre-thrust jack 12, its hydraulic rod extends and through the nozzle 16 rests on the upper part of the inner cylinder 8. At the same time, the working fluid from the hydraulic jack of the pre-expansion hydraulic jack

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enters the rod end of the hydraulic cylinder 21 of the control clamping device 10 and it is released. As the ram of the pre-expansion jack 12 continues to extend along with the inner cylinder 8, the height of the support section increases and it spreads between the roof and the soil of the formation with the pre-spreading force. Then, the working fluid is injected into the piston cavity of the hydraulic jack 21 of the control of the clamping device and thereby the operation of this device occurs. In this case, a friction force arises between the inner cylinder 8 and the spacer 19, which determines the bearing capacity of the support section and resists the downward movement of the inner cylinder 8. After that, the working fluid is supplied to the elastic cylinder 15 of the hydraulic cylinder jack 11, which expands, lifts the sliding element 14 with the outer cylinder 9 attached to it, having a mobile link with the housing 13. At this, the pre-thrust force increases and becomes approximately equal to the working height. Resist fix. Subsequently, the drain to the main is opened and the hydraulic jack of the pre-thrust force is reduced by force or under its own weight.

During abrupt: lowering of the hard-to-collapsing roof, the inner 8 and outer 9 cylinders are displaced by the amount of displacement of the roof, and thus the support of the lining is provided, and the destruction of the strut is eliminated. At the same time, the working resistance of the support remains constant and equal to the frictional force between the mating surfaces of the sliding cylinder 8 and spacer 19 of the clamping device 10.

When the support section is moved, the working fluid through the distributor is again supplied to the piston cavity of the jack 12 prior to thrusting and from it into the rod cavity of the hydraulic cylinder 21 of the control of the clamping device 10 and simultaneously the working fluid from the elastic cylinder 15 of the hydraulic cylinder 11 enters the drain. Under the action of the pressure of the working fluid of the jack 12

the pre-expansion is raised and comes into contact with the upper part of the inner cylinder 8, and the clamping device 10 is released. After that, the lining section is unraveled between the roof and the soil of the reservoir with the force created by the pre-thrust jack and, when the shifter jack 6 is turned, moves to the bottom with backwater.

Claims (2)

1. The mechanized roof support section, including the overlap, in the upper part of which goats and rivers are hinged, the base, which is hingedly connected to the overlap in the bottomhole section through the strut stand, and in talus section, the hydraulic jack of the advancement, which is different what with the purpose Improving the reliability and efficiency of the lining by preventing irreversible deformations in the spacing hydroresistance during harsh precipitations of a hard-to-collapsing roof, the spacing hydroresistance is made in the form of telescopically interconnected inner and outer cylinders connected by a clamping device; a part of the outer cylinder, a sliding element and an elastic cylinder placed between them, a jack of pre-thrust placed inside the center cylinders pivotally connected to the sliding element and interacting through the rod through the nozzle with the upper part of the inner cylinder. 2. Section according to claim 1, characterized in that the housing is rigidly embedded in the base, and the sliding element is hingedly connected to the lower part of the outer telescopic cylinder, while the sliding element is designed with eyelets having openings, and on the base there are guides with longitudinal paeami for communication with the sliding element by means of fingers mounted in the holes of the lugs and grooves of the guides. 20 2 Fig.Z Aa (Rig. 25 22 S.Patrusheva 22 25 9ig.5 Compiled by P. Dundua Tehred M. Holanich Proofreader M. Demchik Order 2329/33 Circulation 454 Subscription VNIIPI USSR State Committee for inventions and discoveries 113035, Moscow, Zh-35, Raushsk nab., 4/5 Production and printing company, Uzhgorod, Projecto st., 4