RU2515759C1 - Heading blast digger - Google Patents

Abstract

FIELD: mining.

SUBSTANCE: invention relates to heading blast digger with safety lining. It comprises intake wedge part with loading module, bin for blast loading, unloading scraper part, self-propulsor, pump station, control board, hydraulic manipulator with drill rig at gantry car displacing over stage loader support. Note here that tail part of blast loading bin accommodates lining placer consisting of two props equipped with mount fork shaped in a definite way. Note here that said shape allows accommodation of fasteners composed of top and bottom sheets of metallic gauze reinforcements and top and bottom sheets of metallic strip grabs shifted relative to each other. Note also that said forks are connected by crosswise bar and arranged to be displaced relative to said props up and down by hydraulic cylinders. Said forks are lifted and lowered by control board.

EFFECT: mechanised walling system.

5 dwg

Description

The invention relates to mining. Designed for the mechanization of horizontal and slightly inclined workings using the blasting method, reducing labor intensity and increasing the productivity of tunneling. The proposed complex with a fixer allows you to mechanize the processes of cleaning the destroyed rock mass, drilling holes for the bottom and under the anchors, installing anchors, installing permanent fastening in the form of a mesh tightening with a metal pickup, eliminates the need to divert it from the bottom to a safe distance before blasting and erect a temporary safety lining in the bottomhole zone, provides protection of the complex equipment from the effects of an explosion.

Known tunneling complex for mining hard rock "Tunneling complex explosive and rolling (PKVN-04)" [1]. The equipment of the complex has the following composition: receiving wedge part with loading module, hopper for explosive loading, unloading scraper part (conveyor), self-moving mechanism, pump station, control unit and control panel, hydraulic manipulator with a drilling machine on a special gantry truck, which moves at the reloader head special mechanism.

The disadvantages include: lack of safety support; the implementation of the process of self-movement with the help of hydraulic cylinders and a chain device attached to anchors fixed to the mine working near the bottom of the face.

The closest in constructive device is the "Tunneling and blasting complex" [2]. The complex under consideration includes: a receiving wedge part with a loading module, a hopper for explosive loading, an unloading scraper part (conveyor), a self-moving mechanism, a pump station, a control unit and a control panel, a hydraulic manipulator with a drilling machine on a special gantry truck, which is moved at a special stand mechanism, safety support, consisting of racks and safety shields and moving along the guides on the sides of the hopper on special running carriages. The operations of loading and drilling holes are carried out in the bottomhole zone under the protection of the protective lining. Drilling holes for anchors is carried out using drilling equipment through special holes in the safety support.

The disadvantages of the complex under consideration include the inability to fix the mine with permanent support, which limits the scope of the complex to mine workings, the geological conditions of which allow the use of only anchor supports. The most common at present is the permanent fastening of the roof of the mine with a drawdown with a metal strip pick-up worn on the anchors installed in the roof. The construction of a permanent mount with a large lag from the bottom is contrary to safety requirements. The fastening should be carried out immediately after the movement of the complex, which is very difficult, since the proposed complex allows for the development of a small section (width 3 ÷ 3.5 m), and the unloading scraper part (conveyor), pump station, control unit occupy a considerable space and do not allow you to place the installer in the immediate vicinity of the complex. The use of a monorail mount installer is also difficult due to the small cross section of the mine and leads to additional costs of material and labor resources for the installation of the monorail. Therefore, the construction of a permanent mount is possible only by hand, which is associated with a significant increase in the complexity of penetration.

The aim of the present invention is to improve the design of the tunneling complex to eliminate these disadvantages, i.e. development of devices for the mechanization of the construction of a permanent lining immediately after the complex is advanced.

According to the invention, the goal is achieved in that a tunneling and blasting complex, including a receiving wedge part with a loading module, a hopper for blasting, an unloading scraper part, a self-moving mechanism, a pump station, a control panel, a hydraulic manipulator with a drilling machine on a gantry truck, which moves at a stand reloader with a special mechanism, safety support, moving along the guides on the sides of the hopper and consisting of racks and safety shields, equipped with a mounter located in the rear of the explosive hopper. The crepe installer consists of two racks equipped with mounting forks that can move up and down relative to the racks by means of hydraulic cylinders. On the installation forks, a set of fastening materials is placed in the amount necessary to fix the development section at a distance of movement per cycle with permanent support. according to safety requirements, the backing of the lining from the bottom should be no more than two rows of anchor lining, the set of fixing materials placed on the installation forks consists of two sheets of metal mesh tightening and two metal strip pickups. Sheets of metal mesh tightening have dimensions corresponding to the width of the workings and the pitch of the rows of anchor supports so that the grid overlaps the entire width of the workings and is worn on the anchors of two adjacent rows. The mounting forks at the ends have projections. The lower strip pickup with the bottom sheet of metal mesh tightening laid on it is placed directly on the installation forks. The upper strip pickup with the upper sheet of metal mesh tightening laid on it is placed on the protrusions of the installation forks. Thus, the upper sheet with pickup and the lower sheet with pickup are offset relative to each other in the vertical and horizontal planes. This arrangement of the set of fasteners is made with the aim that the lower grab does not interfere with the installation of the upper grab. The absence of a protrusion at the ends of the installation forks, i.e. if the grips with the sheets lie on top of each other, it can lead to the fact that, when the upper sheets are gripped to the roof, the upper and lower sheets of the mesh can interlock with each other as the complex moves forward after the upper gripper is fixed on the anchors , lead to the displacement and fall of the lower pick-up and mesh from the installation forks, which is unacceptable. The location of the upper pickup on the protrusions of the forks, firstly, eliminates the tight contact of the mesh sheets with each other when pressing to the roof, and secondly, if the mesh sheets mesh with each other, and when the complex moves forward, the lower mesh sheet will shift from the design position, is excluded the possibility of a fall of the lower pickup from the installation forks, since the protrusions on them will not allow it to fall. In this case, the return of the lower grid sheet to the design position is not associated with large labor costs. The height of the protrusions at the ends of the installation forks does not exceed the thickness of the pickup, since otherwise the protrusions will impede the tight clamping of the lower pickup with the net to the roof. The installation forks are interconnected by a transverse beam to prevent sagging sheets of mesh tightening. When lifting the forks, the upper mesh is put on and picked up on the previously installed anchors and pressed them to the roof of the mine. The grab is fixed to the anchors with nuts, the forks are lowered so that the bottom sheet of the mesh puff is not worn on the next row of anchors along with the top sheet. After the complex has been moved to the bottom to the installation step, the forks are lifted, put on anchors and pressed to the roof of the lower sheet of net and grab and fasten with nuts.

The essence of the proposal is illustrated by drawings, where:

in figure 1. presents a general view of the complex with a set of fixing materials placed on the mounter (side view);

figure 2. submitted node a in figure 1;

figure 3. the position of the installer is presented when pressing the upper mesh and pick-up to the roof (side view);

figure 4. the position of the installer is shown when lower grids and pick-ups are pressed to the roof (side view);

figure 5. presents the position of the mount with the empty installation forks down (rear view).

According to the invention, the complex consists of a loading module 1, a hopper for blasting 2, an unloading scraper part 3, a self-moving mechanism 4, a pump station 5, a control panel 6, a hydraulic manipulator with a drilling machine 7 on a gantry carriage 8, moving along the wedge of a wagon loading crane, safety support including racks 9 and safety shields, consisting of a front section 10 and a rear section 11, a fixer, consisting of two racks 12, installation forks 13 and a transverse beam 14. On installation in In the holes 13, a set of fixing materials is arranged, consisting of an upper sheet of metal mesh 15 used as a tightening of the roof of the mine, upper metal strip pickup 16, lower sheet of metal mesh 17 and lower metal strip pickup 18. The installation forks 13 at the ends have projections 19. Moving installation forks 13 relative to the uprights 12 is carried out by hydraulic cylinders 20. The safety lining moves along the guides on the sides of the hopper for explosive filling 2 by means of running carriages 21. Raising and holding the front sections 10 in a horizontal position, as well as lowering the front sections, is carried out by means of hydraulic cylinders 22. The crepeinstaller is controlled from the control panel 6 of the complex. Using the equipment of the complex, anchors 23 are installed in the roof, on which sheets of mesh 15, 17 are subsequently put on with strips 16, 18 and fixed with nuts 24.

The operating procedure of the tunneling complex.

Before blasting, the complex is located at the bottom of the face. The drilling equipment 7 is diverted to the tail of the blasting hopper 2. The safety support also moves to the tail of the blasting hopper 2 and is located above the drilling equipment 7. The hydraulic cylinders 19 are folded and lower the front sections 10 of the safety shields that protect the drilling equipment 7 from flying pieces rock mass during the explosion. After blasting the holes and ventilating the mine, the main part of the stack is unloaded by the wedge reloader to the unloading scraper part 3. The rock mass that has fallen onto the sides of the bunker for the explosive dump 2 is dumped by the hydraulic cylinders of the bunker sides onto the wedge reloader and also fed to the scraper part 3. Before the beginning of the rise of the sides of the hopper for the blasting 2 hydraulic cylinders 22 are moved apart and raise the front sections 10 of the safety lining. As the stack is unloaded, the complex is moved to the bottom of the face by means of a self-moving mechanism 4 at a step distance between the rows of anchor supports. Fixing forks 13 rise up and put the upper mesh sheet 15 and upper grab 16 previously laid on them onto the anchors 23 installed in the roof. The grab 16 is fixed to the anchors 23 with nuts 24. The forks 13 are lowered so that the bottom tightening sheet does not catch for anchors installed in the roof. Then the complex is again moved to the face by means of a self-moving mechanism 4. At the same time, the remaining part of the stack goes to the loading module 1 and transported to the scraper part 3. At the end of the unloading of the entire volume of the rock mass, the drilling equipment 7, under the protection of the protective lining, moves to the bottom of the reloader for drilling holes for anchors, and then for the face. At this time, the installation forks 13 rise and fasten the bottom sheet of mesh 17, which they press against the roof, and the lower grab 18 to the next row of anchors 23. After drilling the face and securing the mine, while loading the holes on the installation forks, a new set of fixing materials is laid - mesh sheets 15, 17 and pickup 16, 18. Then the cycle of work is repeated.

Literature

1. Khazanovich G.Sh., Lyashenko Yu.M., Nikitin E.V., Kornichenko A.S. Explosive and rolling tunnel complex with a wedge-scraping reloader and a drilling rig (PKVN-04) / Izv. Universities North-Caucasus. region. Tech. Sciences. Specialist. Issue "Problems of Mining Electromechanics". - 2005. - P.58-62.

2. Pat. 2451791 RF, MKI E21D 9/10, E21C 27/20, E21D 9/12, E21D 13/04. Tunneling and blasting complex / Khazanovich G.Sh., Voronova E.Yu., Chernykh V.G., Zakharov M.Yu. - No.2010150794 / 03; Claim 12/10/10. - Publ. 05/27/12, Bull. No. 15.

Claims (1)

A blasting and boring complex, including a receiving wedge with a loading module, a blasting hopper, an unloading scraper, a self-moving mechanism, a pump station, a control panel, a hydraulic manipulator with a boring machine on a gantry truck moving around the loading unit, a safety support consisting of racks and safety shields and moving along the guides on the sides of the hopper using the running carriages, characterized in that in the tail of the hopper for blasting and there is a fastener, consisting of two racks, equipped with installation forks, interconnected by a transverse beam, mounted with the possibility of moving relative to the racks up and down by means of hydraulic cylinders, allowing them to be placed on a set of fixing materials in the form of upper and lower sheets of metal mesh tightening and upper and lower metal strip pickups, offset from each other, the raising and lowering of which is carried out from the control panel of the complex.

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