SU840392A1 - Power roof support unit top - Google Patents

Description

one

The invention relates to mining and is intended to maintain the wellbore space of the clearing slab in the conditions of weak bedrock rocks using mechanized roof supports.

The overlapping of the mechanized roof support section, including the upper section made in the form of a box-section beam, and the extendable console, is known on the beam and a slotted cam interacting with the extendable console, and an elastic element entering the cam grooves. When the hydraulic jack of the inside beam is extended, the console extends from the beam and is pressed against the roof by the end of the figured cam due to the twisting of the elastic element W-.

However, in the device, the console is fixed only on one side and does not support the overlapping of the mass of the formation, as a result of which the roof is not reliably supported.

The closest to the proposed technical essence is the overlapping of the mechanized support section, the sliding retractable console, which has a proppant at its free end, containing a top plate and a wedging drive, made in the form of a jack mounted on the free end of the console with the possibility of interaction with the expansion fist 2

The disadvantages of this overlap are its low reliability due to the large number of articulated arms.

0 knots, large dimensions of the proppant, which requires the creation of a slot of considerable size, which requires special digging devices of complicated size.

5 design and high power, insufficient supporting surface of the plates, when moving the lining section to the chest, the console is not used to spread the console into the slit to tighten it.

0

The purpose of the invention is to ensure reliable operation of the sliding console when relying on the formation.

The goal is achieved by the fact that the bottom plate is rigidly connected

5 with the lower part of the console, and the upper plate is pivotally connected to the upper part of the console and rigidly with an expansion fist, which is made with a profiled surface for

Claims (2)

0 interaction with the jack. FIG. 1 shows the overlapping of the mechanized roof support section, a general view; in fig. 2 - overlap, plan; in fig. 3 shows a section BB in FIG. 2; in fig. 4 - the free end of the console with a riving device placed in the slot. The overlapping of the mechanized support section includes a beam 1 of the ceiling, inside of which an extension to the console 2 is placed, telescopically movable along the support rollers 3 in the beam 1, and a proppant 4 located at its free end. The proppant 4 contains two plates, with the top plate 5 made in the form of a horizontal plate pivotally attached to the upper part of the console 2 with a spacer cam b having a shaped surface against which the stem 7 of the jack 8 abuts, and the bottom cheek 9 is a continuation of the bottom parts of the console 2. Inside the beam 1, a drive 10 is installed, made in the form of a hydraulic cylinder, which serves to move the console 2, and hydraulic cartridges 11, which are used to press the support rollers 3 by means of levers 12 from the support surface and provide free movement of the beam 1 relative to the sliding console 2 while tightening the section of the support to the bottom of the chest. The operation of the overlapping of the mechanized support section is carried out in the following sequence. In the initial position, the extendable console 2 is located inside the beam 1. When the actuator 10 is turned on, the console extends out of the beam 1, rolling along the support rollers 3, and enters the gap made in advance under the seam roof. In this position, the console rests on the formation. When the retractable cantilever 2 stops in the bottom of the slot, the wedging device 4 is thrown under the pressure created inside the jack 8, the rod 7 is pushed out, which pushes the spreading cam 6 upwards and thereby lifts the upper plate 5, wedging the free end of the retractable cantilever 2 between do roof and mass of the reservoir. After the sliding console 2 is wedged into the slit, the section is moved to the chest; for this purpose, the rocket cartridges 11 are depressed, the support rollers 3 are pressed by means of the lever 0 to 12, the pressure of the sliding console 2 to the roof is reduced and the force is reduced Press the top 1 to the top of the seam. The actuator 10 performs additional tightening of the lining section to the chest. Such a movement is possible due to the creation of a sufficient wedging force in the slot when struck. To withdraw the sliding console 2 from the slit, the upper cheek 5 is unloaded by moving the stem 7 of the jack 8 in the opposite direction. The invention provides high reliability proppant by simplifying the design. The height of the proppant dimensions of the proposed construction is significantly less than that of the known, which allows the cracks for support and propping to be performed with the help of a flat bar of the simplest design, as a result of which large supporting forces are achieved due to the large bearing surfaces. allows you to create a permanent console spread in the slit. . Claims Overlap, section mechanized support, including retractable console, having a proppant at the free end, containing a top plate with a spacer fist, bottom plate and a proppant drive, made in the form of a jack mounted on the free end of the console with the ability to interact with the spacer fist, characterized in that, in order to ensure reliable operation of the extendable console when relying on the formation, the lower plate is rigidly connected to the lower part of the console, and the upper plate is a hinge angles connected to the upper part of the console and rigidity to the spacer fist profiled surface adapted for engagement with a jack. Sources of information taken into account in the examination -. 1. USSR author's certificate 464702, cl. E 21 O 17/054, 1974. 2. USSR author's certificate No. 630427, cl. E 21 D 23/06, 1977.