SU844775A1 - Power roof support for thin steep beds - Google Patents

Description

The invention relates to mining and can be used in mechanized supports for thin steep formations, including those with weak lateral formations. . Known mechanized lining for thin steep seams, working in a complex with a narrow gangway, consisting of sections, including overlapping, hydraulic, base, fencing and interconnected telescopic connections and hydraulic jacks. When working, as the combine passes, it is produced by alternating razkaz razka and movement to the bottom of the lining section. The disadvantage of such a support is the low coefficient of roof fixing, due to the relatively large value of its exposure during excavation and the movement of the support with unloading of seed, which prevents the use of the support in case of unstable and moderately stable roofs. The closest to this invention in its technical essence and the achieved result is mechanized lining for thin steep seams consisting of sections, including bases, curved hydraulic legs, overlaps of the base beam with shanks, connected with overlappings to the hydrodynamic TaNat, on which the pipelines are fixed. hydraulic racks with the possibility of swinging. Downhole hydraulic rails rest on the bases and are connected with them pivotally. In the initial position, the support sections are installed according to a saw-tooth pattern. The plow, working in conjunction with the support, is moved along rails located on the base beam, which is constantly pressed to the roof with bottom-hole hydraulic supports, which allows for efficient and effective

maintenance and minimum roof exposure in front of the roof.

The disadvantage of the lining is the combination of the front section of the section group with unloading and swinging of the corresponding downhole hydraulic rails, due to the kinematic connection of the latter with the bases of the lining sections, which reduces the front overhang and increases their frequency.

This work of roofing leads to the toptop of the roof and prevents the use of this roofing with weak lateral rocks. A disadvantage is also a significant fluctuation in the resistance of the support in the zone of movement of the sections and an increase in the forces in the jacks when the sections are tightened.

The purpose of the invention. is an increase in the step of shifting sections, and an increase in reliability.

To achieve this goal, the lining is provided with separate supporting shoes - located between the base / bottom of the mine side, and the base beam is connected to the bottom racks with individual drive gears, while the bottom rails are pivotally connected to the support shoes .-.

FIG. 1 shows a transverse time; a cut (A-A of Fig. 2) of the fixture in Fig. 2 shows a part of the mech support, a view in plan, with the sections arranged in a straight-line diagram in Fig. 3 section BB of FIG. 2

The mechanized lining contains a base beam 1 with shanks 2 located on the side of the bottom, made in the form of plates 3 pivotally interconnected, bottom racks 4 pivotally fixed on the base beam with the possibility of swinging in the side of the bottom and fitted with support shoes 5 the soil, sections b and hydraulic jacks connecting them with the base beam 7.

The swinging of the bottom aps of hydraulic rails 4 relative to the base beam 1 is allowed at a certain angle with a corresponding rotation of the support shoe 5 The bottom hydraulic rails are equipped with an individual drive 8 rocking forward relative to the base beam 1, made in the form of a power hydraulic cylinder of direct action with a lever mechanism and ensuring lateral stability of the bottom hole . The individual drive of the swing can also be made in the form of a spring shock absorber.

Section 6 of the lining contains the base 9, the overlap 10, hydroracks 11 installed between them, the barrier 12, the mechanisms 13 of the longitudinal and 14 lateral stability of the sections.

Base beam 1 is associated with

equipments for moving the excavation machine, of the plow type (not shown in the drawing. Guides can be fixed on the base beam directly or through kinematic

link.

In the initial position, the lining sections and support shoes of the downhole girders can be arranged straight-line or in a saw-tooth pattern in groups dispersed along the length of the lava. But in both cases, the shifting of the support sections and the swinging of the downhole hydraulic rails are carried out in frontal groups, with the swinging of the hydraulic posts and the shifting of the sections separately and the step of shifting the support shoes of the bottom hydraulic posts is usually smaller than the step of shifting the support sections. The lining sections move after several swings of the shoes.

The support works as follows.

In the initial position, the base beam 1 is located at the bottom, pressed to the roof by bottom hydraulic posts 4, which are maximally deflected toward the bottom relative to the base beam (forward support shoes), hydraulic jacks 7 are shortened, sections 6 are tightened to the base beam.

After the coal is excavated by the excavation body, the hydraulic jacks 7 are moved apart and the base beam is fed to the bottom, while the necessary thrust forces are maintained in the hydraulic posts 4, while the bottom hydraulic bars are deflected backward relative to the base beam.

Claims (2)

The base beam is fed up to the maximum deflection of the bottomhole rails, after which the bottom rails dispersed along the length of the lava groups are alternately unloaded and, by means of the individual swing drives 8, are deflected, forward to the initial position. The feed cycles of the base beam and the swings of the downhole girders forwards are repeated until the hydraulic blocks 7 are completely separated, after which consecutive frontal tightening of the sections of the support sections 6 is performed. The implementation of lining with individual drives for swinging of bottomhole rails and detached support shoes near the soil, connected to the bottom racks, allows increasing the step of shifting the lining sections and reducing trampling of the roof, thus increasing the reliability of the lining. Claims of the invention: Mechanized lining for thin steep seams consisting of sections, including bases, hydraulic posts, overlap, and base beam with shanks, connected that, in order to increase the step of moving the sections and increase the reliability of work, it is equipped with separate supporting shoes placed between the bases on the side of the bottom, Boyne gidrostoykami individual drives wobble, the downhole gidrostoyki pivotally connected to opgrnymi shoes. Sources of information taken into account in the examination 1. USSR author's certificate number 178330, cl. E 21 D 23/04, 1966. 2. Corin V.N. Hydraulic lining of clearing workings. M., Nedra, 1973, pp.166-167.