RU2709894C1 - Powered support section with coal discharge device - Google Patents

Abstract

FIELD: mining.

SUBSTANCE: invention relates to a powered support section with a coal discharge device. Said section comprises base, ceiling, hydraulic racks and lifting jacks. Overlap is made as composite, including base overlapping, rotary covering and shield, rotary covering is hingedly connected by one side with base covering, and the other – with shield. Base covering is connected to the base by means of hydraulic posts normally oriented to the base, rotary covering is connected to the base by means of hydraulic posts, pivotally fixed on the base with the possibility of rotation in the vertical plane to the bottomhole – from the bottomhole, the shield is connected to the base by the hydraulic ram, fixed on the base by means of the rotary hydraulic motor. At that, the outlet opening is formed by lowering the shield to the working soil, the chute functions as a rotary shutter, and the feeder – raising paws and a scraper reloader.

EFFECT: increased efficiency of the support section operation for coal output from the overlying massif into the working space and its loading into the vehicle due to transformation of the part of the composite elements into the receiving-loading zone.

1 cl, 13 dwg

Description

The technical solution relates to mining, in particular, to fastening the face and relates to the construction of mechanized supports designed to maintain the working space when developing powerful seams with the release of coal from an overlying (subroofing or interlayer) mass.

There is a known construction of a section of powered roof support with a coal exhaust device, comprising a base, a guard with a visor, hydraulic racks, hydraulic jacks and a tray. An opening was made in the enclosure for the release of coal of an overlying stratum mass onto a downhole conveyor, closed by a hydraulic-operated shutter [Equipment for mechanization of treatment works in coal mines / Ed. B.F. Bratchenko, M .: Nedra - 1972. - S. 103-106 (analog)]. The disadvantage of the lining section is that the opening is made in the fence at a sufficiently high height, and its area is very limited in size. Therefore, when the overlying stratum is released, coal that does not enter the opening appears in the worked out space and will be lost. In addition, a narrow scope is only for shallow formations.

The closest analogue, adopted as a prototype, is a section of mechanized roof support containing a base, ceiling, fencing, hydraulic struts and jacks; an outlet window is made in the enclosure, connected with the gutter and feeder, by means of which coal of an overlying stratum is released onto the conveyor [V. Klishin Development of powerful seams with mechanized roof supports with controlled release of coal / V.I. Klishin, Yu.S. Fokin, D.I. Kokoulin, B. Kubanychbek uulu - Novosibirsk: Science - 2007 - 135 p. (prototype)]. This lining is universal, as it allows you to develop powerful layers, not only gentle, but steep with the release of coal overlying strata [Pat. 78864 RU, IPC E21D 23/00. “Mechanized lining for mining powerful steeply falling layers by a subterranean recess”, V.I. Klishin, D.I. Kokoulin, B. Kubanychbek, application 2008129446 dated July 17, 2008, publ. 12/10/2008, bull. No. 34]. But she also has disadvantages:

- the lower edge of the outlet window in the fence is located at a sufficiently high height relative to the base. This leads to a high level of operational losses of coal, since the released coal lying on the production soil at a level below the lower edge of the outlet window cannot be loaded into the vehicle;

- the width of the outlet window is less than the width of the lining section. Oversized chunks of coal can completely cover its area and thereby direct the flow of coal produced into the mined space, which also increases operating losses.

The lining section with the device for the release of coal from the mass of the overlying strata is intended not only to protect the working space from the penetration of rocks, but also to ensure the effective release of coal from the overlying stratum into the working space and loading it into the vehicle. These disadvantages reduce the efficiency of the lining section for the production of coal from the overlying strata.

The aim of the invention is to increase the efficiency of the lining section for the release of coal from the mass of the overlying stratum into the workspace and loading it into the vehicle due to the transformation of part of the constituent elements in the receiving and loading zone.

This goal is achieved by the fact that in the section of the powered roof support with a coal exhaust device containing a base, a ceiling, hydraulic struts and jacks, a discharge window, a chute and a feeder, in accordance with the technical solution, the ceiling is made integral, including a base ceiling, a rotary ceiling and a visor , the swivel overlap is pivotally connected on one side to the base overlap, the other to the visor, the base overlap is connected to the base via hydraulic struts, normally orientated data to the base and rigidly fixed on it, the pivoting is connected to the base by means of hydraulic racks pivotally mounted on the base with the possibility of rotation in the vertical plane to the bottom - from the bottom, the visor is connected to the base with a hydraulic jib fixed to the base by means of a rotary hydraulic motor, the exhaust window is made in the ceiling, the gutter is made in the form of a rotary ceiling, and the feeder is in the form of raking legs and a scraping loader.

The invention is illustrated by diagrams. In FIG. 1 shows a section of the support of the head group (side view); in FIG. 2 - excavating machine (side view); in FIG. 3 - section support the tail group (side view); in FIG. 4 - loading machine (side view); in FIG. 5 - the same (plan view); In Fig 6 - the arrangement of the equipment during the dead-end production; in FIG. 7 - the same (plan view); in FIG. 8 - creation of a reception and loading zone; in FIG. 9 - the same (plan view); in FIG. 10 - the initial stage of work on the production of coal overlying strata; in FIG. 11 - flow control of the overlying coal produced by the slope of the slabs of the bottomhole row of lining sections; in FIG. 12 - transfer of the fence of the receiving and loading zone above the rock dump; in FIG. 13 - opening, preparation and procedure for mining the excavation site.

The mechanized roof support section 1 comprises a base 2, hydraulic ram jacks 3 installed in the inner cavity of the base on the bottom side, and 4 installed in the inner cavity of the base on the opposite side; the overlap, in turn, consisting of a base floor 5, a pivoting floor 6 and a visor 7. In this case, the visor 7 is pivotally connected via axis 8 to the pivoting floor 6. The base floor 5 is connected to the base 2 by means of hydraulic struts 9, normally oriented to the base and rigidly fixed on it. The pivoting floor 6 is pivotally connected to the basement 5 by means of the axis 10, and with the base 2 by means of hydraulic struts 11, which, in turn, are pivotally mounted on the base 2 with the possibility of angular movements in the direction to the bottom - from the bottom in a vertical plane.

In the inner space of the base floor 5 there is a retractable visor 12, controlled by a hydraulic jack 13; in the inner space of the rotary overlap 6 is placed a retractable visor 14, controlled by a hydraulic jack 15.

The bottom edge of the visor 7 is supported by a hydraulic jib 16, mounted on the base 2 on the left in the bottom row (for the right lining section - on the right) by means of a rotary hydraulic motor 17. In its lower part, the jib 16 is equipped with an eye 18.

The lining section can work as part of a set of equipment when developing powerful coal seams of a gentle (development of edge zones of a mining field), steep and steeply inclined bedding. As an example, consider the operation of a set of equipment in the development of a steep formation with the release of coal of an overlying stratum.

In the installation chamber, which is built at the beginning of the excavation, a set of equipment is mounted, including a mining machine 19, a loading machine 20, two sections of the support 1 (left and right) forming the head group, and two sections (right and left) of the supporting roof 21, forming a tail group.

The excavation machine 19 comprises a telescoping telescopic cutting body 22, a rotatable housing 23, a movable carriage 24, and hydraulic swing jacks 25 of the cutting body 22.

The loading machine 20 includes a table 26 with raking legs 27, an inclined frame 28, a scraper loader 29.

The supporting roof section 21 includes a base 30, a ceiling 31 and four hydraulic struts 32, normally oriented to the base 30. A retractable visor 33, controlled by a hydraulic jack 34, is placed in the inner space of the ceiling 31.

A loader 20 is mounted along the axis of the future development, orienting it with a table 26 with raking legs 27 towards the side of the excavation drift 35. On the inclined frame 28, a excavation machine 19 is installed, orienting it with the cutting body 22 towards the bottom of the excavation drift 35. To the right and to the left of the loader machines 20 mount sections 1 of the head group (in Fig. 6 and further, the sections of the support of the head group are conventionally indicated by 6), orienting them with their visors 7 towards the bottom of the recessed drift 35; each section of the roof support of the head group is connected by hydraulic jacks 3 to the loading machine 20. Following the head of the sections, sections of the roof support of the tail group 21 are installed (in Fig. 6 and further, the sections of the roof support of the tail group are conventionally indicated by 31), connecting their bases 30 to the bases of 2 sections support 1 head group with hydraulic jacks 4.

The lining sections of the head and tail groups are bursting in the mounting chamber between the roofing soil. Moreover, due to the greater width of the ceilings compared with the width of the bases, the roof of the mounting chamber is interrupted almost completely.

When carrying out the excavation drift 35, the excavation machine 19 is moved along the inclined frame 28 of the loading machine 20 towards the bottom of the mine. The cutting body 22 carries out the breaking of coal from the array and the design of the contour of the mine, including the formation of the roof in the form of a plane parallel to the soil of the mine.

The coal chipped off by the machine 19 enters the table 26 and is sent to the scraper loader 29 with the raking legs 27. For the most complete filling of the table 26 with the charcoal beaten with hydraulic jacks 3, the loader 20 is moved towards the bottom of the mine. Next, the scraper reloader 29 loads coal into the vehicle, which can be used as a self-propelled wagon, scraper or belt conveyors (not shown).

After moving the loader by the stroke of the rod of the moving jack 3, the spacer is removed from the lining sections of the head group and moving them to the moving step of the hydraulic jacks 4, while reducing the length of the hydraulic jacks 3. At the end of moving the head group of sections, the latter are bursting between the soil and the roof production and reduction of hydraulic jacks 4 carry out the movement of the tail group of lining sections.

After moving the tail group of the lining sections, the excavating drift 35 is fastened by erecting the lining 36 with or without tightening the working sides depending on their stability. Etc.

Upon reaching the excavation drift 35 of the boundary of the extraction field, the mining is stopped, the extraction machine 19 installed on the loader 20 is moved away from the bottom along the frame 28 of the loader, orienting its cutting body 22 along the axis of the excavation 35 in the space above the reloader 29, and proceed to the creation of the receiving and loading zone 37. To do this, remove the axis 8 connecting the visor 7 with the rotary overlap 6. Then turn on the rotary hydraulic motors 17 of the right and left sections of the lining of the head group to lower the jib 16. Together with the mowing inami 16 to the soil of the excavating drift 35 the visors 7 of the right and left sections of the support of the head group are lowered. At the same time, using simple devices, for example, a cable and a winch, provide smooth lowering and approximately simultaneous reaching by the visors 7 of the soil of development along the normal to it. Next, from the pivoting ceiling 6 with a hydraulic jack 15, a visor 14 is advanced, thereby protecting the receiving and loading zone 37 from possible coal outfalls from the working roof. Visors 7 of the right and left sections of the lining are connected by an overlay 38. Then, depending on the design capacity of the array of the overlying stratum, the length of the jibs 16 is extended or shortened, providing the required receiving capacity of the zone 37 (volume); strut 39, using the eyes 18, fix the set length of the jib 16.

Several wells 40 are drilled into the array of the overlying stratum above the loading and loading zone 37 by means of which they provoke the collapse of coal (for example, using explosive charges, hydraulic fracturing, elastic vessels with an non-explosive expanding mixture, etc.). Then, in the space between the head and tail groups of sections, a number of wells 41 are drilled into the array of the overlying stratum, tilting them away from the bottom of the mine 35. These wells weaken the mass of the overlying stratum and prepare it for release as the equipment moves. A number of wells 42 are drilled into the underlying array, also tilting them away from the bottom of the mine 35, and thereby preparing the array of the underlying stratum in advance in advance (during the next excavation drift 43, this array will be overlying and its upper part will be prepared in advance).

The collapsed coal of a part of the massif of the overlying stratum flows by gravity into the receiving and loading zone 37, in which it is sent to the reloader 29 by means of its raking legs 27 of the loading machine 20, by means of which it is loaded into the vehicle. With block caving of coal, large chunks of coal may appear, which are directly destroyed by the cutting unit 22 of the extraction machine 19 to the required size.

At the end of loading the first portion of the collapsed coal, all equipment is moved to the step of moving the support sections away from the bottom, an array of overlying stratum is drilled from the side of the bottom (well 40) and in the space between the head and tail groups of the support sections (well 41), as well as the underlying array strata (wells 42). If necessary, again use means that provoke the collapse of coal over the receiving and loading zone, using wells 40. And so on, until after the equipment has been moved, special means will be required that provoke the collapse of the portion of coal.

From this moment, stop drilling wells 40, rotary ceilings of 6 sections of the lining of the head group, tilt towards the bottom. At the same time, the self-collapsed part of the massif of the overlying stratum flows by gravity to the inclined rotary overlap 6, along which it then goes to the receiving and loading zone 37. And so on.

In the event of an emergency, for example, filling the receiving and loading zone 37 with roof rocks, the fence of the receiving and loading zone (visors 7 of the right and left sections of the head group) is raised by means of jibs 16 with rotary hydraulic motors 17 over the rock outlets and, due to the movement of the head group of sections, the reception fence is moved loading zone above the rock dump.

After the release of coal of an overlying stratum over the entire length of mine 35, the equipment is dismantled and transferred to the installation chamber constructed at the beginning of the planned mine 43. Next, as described above.

Thus, the full support section overlaps the roof of the mine and maintains the working space, in addition, due to the transformation of part of the support section, it is provided:

- exposure of the roof section with a width not less than the width of the lining section;

- creation of a receiving and loading zone at the level of the soil of development;

- controlling the flow of coal produced and directing it to the receiving and loading zone, in which the reloader is powered by chopping feet.

All of the above indicates an increase in the efficiency of the lining section for the production of coal of an overlying stratum and loading it into a vehicle, i.e. to achieve the objective of the invention.

Claims (1)

A section of powered roof support with a coal exhaust device, comprising a base, a ceiling, hydraulic struts and moving jacks, a chute and a feeder, characterized in that the ceiling is made integral, including a base ceiling, a swing ceiling and a visor, a swing ceiling is hingedly connected on one side to the base ceiling, the other with a visor, the basic ceiling is connected to the base by means of hydraulic struts normally oriented to the base, the rotary ceiling is connected to the base by m hydraulic racks pivotally mounted on the base with the possibility of rotation in a vertical plane to the bottom - from the bottom, the visor is connected to the base of the hydraulic jib mounted on the base by means of a rotary hydraulic motor, while the overlap is made with the possibility of the formation of the receiving and loading zone, the gutter is made in the form rotary overlap, and the feeder - in the form of heaving paws and a scraping loader.

Images