WO2023282774A1 - Modular mining powered head gate support with the recovery of coal from a main gate in the top coal caving system of work - Google Patents

Modular mining powered head gate support with the recovery of coal from a main gate in the top coal caving system of work Download PDF

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Publication number
WO2023282774A1
WO2023282774A1 PCT/PL2022/000038 PL2022000038W WO2023282774A1 WO 2023282774 A1 WO2023282774 A1 WO 2023282774A1 PL 2022000038 W PL2022000038 W PL 2022000038W WO 2023282774 A1 WO2023282774 A1 WO 2023282774A1
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WO
WIPO (PCT)
Prior art keywords
shield
swivel
joint
fastened
canopy
Prior art date
Application number
PCT/PL2022/000038
Other languages
French (fr)
Inventor
Jacek Kluge
Jacek Wąś
Łukasz GONSIOR
Robert Wieczorek
Original Assignee
Famur S.A.
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by Famur S.A. filed Critical Famur S.A.
Publication of WO2023282774A1 publication Critical patent/WO2023282774A1/en

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Classifications

    • E—FIXED CONSTRUCTIONS
    • E21—EARTH OR ROCK DRILLING; MINING
    • E21D—SHAFTS; TUNNELS; GALLERIES; LARGE UNDERGROUND CHAMBERS
    • E21D11/00—Lining tunnels, galleries or other underground cavities, e.g. large underground chambers; Linings therefor; Making such linings in situ, e.g. by assembling
    • E21D11/14—Lining predominantly with metal
    • E21D11/36—Linings or supports specially shaped for tunnels or galleries of irregular cross-section
    • E—FIXED CONSTRUCTIONS
    • E21—EARTH OR ROCK DRILLING; MINING
    • E21D—SHAFTS; TUNNELS; GALLERIES; LARGE UNDERGROUND CHAMBERS
    • E21D17/00—Caps for supporting mine roofs
    • E21D17/02—Cantilever extension or similar protecting devices
    • E—FIXED CONSTRUCTIONS
    • E21—EARTH OR ROCK DRILLING; MINING
    • E21D—SHAFTS; TUNNELS; GALLERIES; LARGE UNDERGROUND CHAMBERS
    • E21D23/00—Mine roof supports for step- by- step movement, e.g. in combination with provisions for shifting of conveyors, mining machines, or guides therefor
    • E21D23/03—Mine roof supports for step- by- step movement, e.g. in combination with provisions for shifting of conveyors, mining machines, or guides therefor having protective means, e.g. shields, for preventing or impeding entry of loose material into the working space or support
    • E—FIXED CONSTRUCTIONS
    • E21—EARTH OR ROCK DRILLING; MINING
    • E21D—SHAFTS; TUNNELS; GALLERIES; LARGE UNDERGROUND CHAMBERS
    • E21D23/00—Mine roof supports for step- by- step movement, e.g. in combination with provisions for shifting of conveyors, mining machines, or guides therefor
    • E21D23/04—Structural features of the supporting construction, e.g. linking members between adjacent frames or sets of props; Means for counteracting lateral sliding on inclined floor
    • E—FIXED CONSTRUCTIONS
    • E21—EARTH OR ROCK DRILLING; MINING
    • E21D—SHAFTS; TUNNELS; GALLERIES; LARGE UNDERGROUND CHAMBERS
    • E21D23/00—Mine roof supports for step- by- step movement, e.g. in combination with provisions for shifting of conveyors, mining machines, or guides therefor
    • E21D23/04—Structural features of the supporting construction, e.g. linking members between adjacent frames or sets of props; Means for counteracting lateral sliding on inclined floor
    • E21D23/06—Special mine caps or special tops of pit-props for permitting step-by-step movement

Definitions

  • the subject of the invention is the powered head gate support with the recovery of coal from a longwall gate road in the top coal caving system of work.
  • the gate shield that cooperate with longwall systems of mining thick coal seams, using the top coal cav- 05 ing method.
  • the top coal caving method for the exploitation of thick coal seams is based on the fact that bottom layer of the seam is mined using the longwall method, while the roofing layer, after being crushed with blasting works, is discharged into the longwall working from the gob side to the second face conveyor.
  • the output from both face conveyors is 10 transported to the beam stage loader.
  • the known design solutions of the gate shields cooperating with longwall systems of mining thick coal seams by the top coal caving method do not allow for the extraction of coal from the longwall gate road beyond the longwall advance.
  • the Polish patent specification no. PL216633 describes a powered roof support unit for extraction of thick seams with a top coal caving sys tem, having an articulating and extendible canopy supported by hydraulic legs mounted on the bases and equipped with an shifting system of a face side conveyor, which is a route for the mining machine and a system for shifting the gob side conveyor for hauling the output obtained from the gob, and additionally having side aprons in the canopy and caving shields, covering the spaces between the units and a hydraulically operat ed drawer-mounted cover plate for the caving shield.
  • the unit has a shifting system of the gob side conveyor with a single stroke greater than the single stroke of the face side conveyor shifting system, preferably being its multiple, fastened to the side of the base, being an element of axial movement with limited freedom of inclination in relation to the base.
  • the caving shield controlled by cylinders is articulated to the main canopy.
  • the caving shield equipped in the lower part with a cover plate that slides down, rectangular in shape, drawer-mounted in guides and deflect ed by two parallel hydraulic cylinders.
  • a segmented caving shield is mounted, having a main shield on one side connected by a swivel joint to the canopy of the central module and on the other side, a inclinable shield connected by a swivel joint to the main shield, and a sliding shield built inside the inclinable shield.
  • the short bases on the side opposite to their connection with the bases of the side modules are separately connected to a lower link.
  • the main guard is supported with connected to it by a swivel -joint hydraulic cylinders, fastened by swivel-joint on the other side to the transverse beam connecting bases of the central module.
  • the main shield is also connected by a swivel joint with the hydraulic cylinders of deflec tion with its other end connected by a swivel joint with an inclinable shield.
  • the inclinable shield is connected by a swivel joint near its axis of rotation with hydraulic cylinders of the extension, the other end of which is connected by a swivel joint to the end part of the sliding shield.
  • the short bases on the side opposite to their connection with the bases of the side modules are separately connected to a lower link.
  • the upper side shield is separately fastened to at least one upper beam from the outside, and the lower side shield is separately fastened to at least one short base from the outside.
  • the upper side shield and the lower side shield overlap each other.
  • the powered head gate support with the recovery of coal from a longwall gate road in the top coal caving system of work ensuring safe work of service staff under the roof support in this area, thanks to the large discharge space, enables the extraction of coal from the longwall gate road behind the wall advance, increasing the daily output, which protects the crushed coal located in this area against spontaneous combustion due to its significant reduction in the amount.
  • FIG. 1 shows the modular powered head gate support according to the inven tion in a side view and from above
  • Fig.2 shows the modular powered head gate support according to the invention in partial longitudinal sec tion
  • Fig.3 shows the modular powered head gate support according to the invention in a partial axonometric view
  • Fig.4 shows the modular powered head gate support according to the invention in partial cross sec tion.
  • the modular powered head gate support with the recovery of coal from the longwall gate road in the top coal caving system of work, ac cording to the invention equipped with mutually parallel side modules and a central module, whereby each of the modules comprises the base, the canopy and legs between the canopy and the base, and a caving shield, which has a closed hole for discharging the output is fastened to the canopies ends of the side modules, while the conveyor runs centrally along the modular roof support, is characterized by the fact that upper beams 3 are fastened by swivel-joint at the canopy ends 1.1.of the side modules 1 , which on the other side are also connected by the swivel - joint to the vertical rear links 4 with their other end also connected by a swivel joint with the short bases 5 fastened by a swivel-joint with their other end to the base ends 1.2.of the side modules 1.
  • a segmented caving shield 6 is mounted, having a main shield 6.1 on one side, con- nected by a swivel- joint to the canopy 2.1 of the central module 2 and connected by a swivel- joint on the other side to the main shield 6.1 , an inclinable shield 6.2 and a sliding shield 6.3. built inside the inclinable shield 6.2.
  • the main guard 6.1. is supported by connected to it by a swivel - joint hydraulic cylinders 7, fastened with the other side by swivel-joint to the transverse beam 8 connecting bases 2.2.of the central module 2.
  • the upper side shield 13 is separately fastened to at least one upper beam 3 from the outside, and the lower side shield 14 is separately fastened to at least one short base 5 from the outside.
  • the upper side shield 13 and the lower side shield 14 overlap each other.
  • the segmented caving shield 6 can only take the form of the main shield 6.1 or the main shield 6.1 connected to the tilting shield 6.2, or as shown in the example of execution, the main shield 6.1, together with the inclinable shield 6.2 and a sliding shield 6.3 built inside it.
  • the sequence of actions can be any, depending on the needs. Blocking of coal pickup occurs in the reverse order.
  • the segmented caving shield 6 has the possibility of deflecting above the surface of the upper beams 3.

Landscapes

  • Engineering & Computer Science (AREA)
  • Mining & Mineral Resources (AREA)
  • Life Sciences & Earth Sciences (AREA)
  • General Life Sciences & Earth Sciences (AREA)
  • Geochemistry & Mineralogy (AREA)
  • Geology (AREA)
  • Architecture (AREA)
  • Structural Engineering (AREA)
  • Civil Engineering (AREA)
  • Excavating Of Shafts Or Tunnels (AREA)
  • Tents Or Canopies (AREA)

Abstract

The modular powered head gate support, with the recovery of coal from the longwall gate road in the top coal caving system of work, ac- cording to the invention is characterized by the fact that upper beams (3) are fastened by swivel-joint at the canopy ends (1.1.) of the side modules (1), which on the other side are also connected by the swivel-joint to the ver- tical rear links (4) with their other end also connected by a swivel joint with the short bases (5) fastened by a swivel-joint with their other end to the base ends (1.2), of the side modules (1). At the end of the canopy (2.1) of the central module (2), a segmented caving shield 6 is mounted, having a main shield (6.1) on one side, connected by a swivel-joint to the canopy (2.1) of the central module (2) and connected by a swivel-joint on the other side to the main shield (6.1), an inclinable shield (6.2) and a sliding shield (6.3.) built inside the inclinable shield (6.2). The main guard (6.1.) is supported by connected to it by a swivel - joint hydraulic cylinders (7), fastened with the other side by swivel-joint to the transverse beam (8) connecting bases (2.2.) of the central module (2). The main shield (6.1.) is also connected by a swivel joint with the tilt hydraulic cylinders (9) with its other end connected by a swivel joint with an inclina- ble shield (6.2). The inclinable shield (6.2.) near its axis of rotation is con- nected by a swivel joint with hydraulic cylinders of the extension (10), the other end of which is connected by a swivel joint to the end part of the sliding shield (6.3).

Description

Modular mining powered head gate support with the recovery of coal from a main gate in the top coal caving system of work
01 The subject of the invention is the powered head gate support with the recovery of coal from a longwall gate road in the top coal caving system of work. There are known structures of the gate shield that cooperate with longwall systems of mining thick coal seams, using the top coal cav- 05 ing method. The top coal caving method for the exploitation of thick coal seams is based on the fact that bottom layer of the seam is mined using the longwall method, while the roofing layer, after being crushed with blasting works, is discharged into the longwall working from the gob side to the second face conveyor. The output from both face conveyors is 10 transported to the beam stage loader. The known design solutions of the gate shields cooperating with longwall systems of mining thick coal seams by the top coal caving method do not allow for the extraction of coal from the longwall gate road beyond the longwall advance.
15 The Polish patent specification No. PL 177421 describes a modular head gate support of a longwall heading with the longwall gate road, con taining two side modules and a central module between them, which modules are mutually parallel and each of them includes a base, canopy and legs between the canopy and base, the side modules are linked trans- 20 versely by connectors and the central module is associated with the side modules longitudinally by hydraulic cylinders. The modular support, according to the invention has one and the same caving shield fastened to the ends of the canopy ends of the side modules and the caving shield has a lower part connected to the canopies of side modules with one upper 5 lemniscate connector with each of the bases and a rear lemniscate con- nector common to both side modules. The inclinable and sliding canopies are fastened to the front end of the side modules' canopies.
The central module canopy has an inclinable canopy fastened to the rear end, supported by a leg, the other end of which rests on the base of the central module.
The Polish patent specification No. PL202104 describes a powered roof support unit, especially for operation with the top coal caving sys tem, having a base, two hydraulic legs, a caving shield with an opening for discharging the excavated material from the picked up layer and a side wall shield. The powered roof support unit according to the invention has a caving shield connected to the canopy, equipped with an opening for discharging the output, closed with a slidable plate and a folding output chute. The caving shield is supported by two hydraulic legs built on one end on the base and on the other end on the caving shield between the edge of the opening and the edge of the caving shield. A conveyor is fas tened to the base.
The Polish patent specification no. PL216633 describes a powered roof support unit for extraction of thick seams with a top coal caving sys tem, having an articulating and extendible canopy supported by hydraulic legs mounted on the bases and equipped with an shifting system of a face side conveyor, which is a route for the mining machine and a system for shifting the gob side conveyor for hauling the output obtained from the gob, and additionally having side aprons in the canopy and caving shields, covering the spaces between the units and a hydraulically operat ed drawer-mounted cover plate for the caving shield.
The unit, according to the invention has a shifting system of the gob side conveyor with a single stroke greater than the single stroke of the face side conveyor shifting system, preferably being its multiple, fastened to the side of the base, being an element of axial movement with limited freedom of inclination in relation to the base. On the side of the cave, the caving shield, controlled by cylinders is articulated to the main canopy. The caving shield, equipped in the lower part with a cover plate that slides down, rectangular in shape, drawer-mounted in guides and deflect ed by two parallel hydraulic cylinders.
The essence of the invention. The modular powered head gate support with the recovery of coal from the longwall gate road in the top coal caving system of work, ac cording to the invention equipped with mutually parallel side modules and a central module, whereas each of the modules comprises the base, the canopy and legs between the canopy and the base, and a caving shield, which has a closed hole for discharging the output is fastened to the canopies ends of the side modules, while the conveyor runs centrally along the modular roof support, is characterized by the fact that upper beams are fastened by swivel-joint at the canopy ends of the side mod ules, which on the other side are also connected by the swivel joint to the vertical rear links with their other end also connected by a swivel joint with the short bases fastened by a swivel-joint with their other end to the base ends of the side modules.
At the end of the canopy of the central module, a segmented caving shield is mounted, having a main shield on one side connected by a swivel joint to the canopy of the central module and on the other side, a inclinable shield connected by a swivel joint to the main shield, and a sliding shield built inside the inclinable shield.
The main guard is supported with connected to it by a swivel -joint hydraulic cylinders, fastened by swivel-joint on the other side to the transverse beam connecting bases of the central module. The main shield is also connected by a swivel joint with the hydraulic cylinders of deflec tion with its other end connected by a swivel joint with an inclinable shield. The inclinable shield is connected by a swivel joint near its axis of rotation with hydraulic cylinders of the extension, the other end of which is connected by a swivel joint to the end part of the sliding shield.
The short bases on the side opposite to their connection with the bases of the side modules are separately connected to a lower link.
The main guard is supported with connected to it by a swivel -joint hydraulic cylinders, fastened by swivel-joint on the other side to the transverse beam connecting bases of the central module. The main shield is also connected by a swivel joint with the hydraulic cylinders of deflec tion with its other end connected by a swivel joint with an inclinable shield. The inclinable shield is connected by a swivel joint near its axis of rotation with hydraulic cylinders of the extension, the other end of which is connected by a swivel joint to the end part of the sliding shield.
The short bases on the side opposite to their connection with the bases of the side modules are separately connected to a lower link.
The main guard is supported with connected to it by a swivel -joint hydraulic cylinders, fastened by swivel-joint on the other side to the transverse beam connecting bases of the central module. The main shield is also connected by a swivel joint with the hydraulic cylinders of deflec tion with its other end connected by a swivel joint with an inclinable shield. The inclinable shield is connected by a swivel joint near its axis of rotation with hydraulic cylinders of the extension, the other end of which is connected by a swivel joint to the end part of the sliding shield.
The short bases on the side opposite to their connection with the bases of the side modules are separately connected to a lower link.
The vertical rear links are detachably connected by a horizontal link.
The upper side shield is separately fastened to at least one upper beam from the outside, and the lower side shield is separately fastened to at least one short base from the outside. The upper side shield and the lower side shield overlap each other.
The profile chutes are fastened to the upper beams from the inside.
There is a profile opening in the rear shield of the central module, the pro- file of which results from the range of movements performed by the sup porting hydraulic cylinder.
Advantageous effects of the invention
The powered head gate support with the recovery of coal from a longwall gate road in the top coal caving system of work, according to the invention, ensuring safe work of service staff under the roof support in this area, thanks to the large discharge space, enables the extraction of coal from the longwall gate road behind the wall advance, increasing the daily output, which protects the crushed coal located in this area against spontaneous combustion due to its significant reduction in the amount.
The risk of self-ignition slows down the longwall advance and forces the use of preventive methods that significantly increase the costs of extraction. Additionally, the possibility of self-ignition significantly worsens work safety. Description of the drawing figures The object of the invention is shown in the drawing, in which Fig.
1 shows the modular powered head gate support according to the inven tion in a side view and from above , Fig.2 shows the modular powered head gate support according to the invention in partial longitudinal sec tion, Fig.3 shows the modular powered head gate support according to the invention in a partial axonometric view and Fig.4 shows the modular powered head gate support according to the invention in partial cross sec tion.
Execution example
The modular powered head gate support, with the recovery of coal from the longwall gate road in the top coal caving system of work, ac cording to the invention equipped with mutually parallel side modules and a central module, whereby each of the modules comprises the base, the canopy and legs between the canopy and the base, and a caving shield, which has a closed hole for discharging the output is fastened to the canopies ends of the side modules, while the conveyor runs centrally along the modular roof support, is characterized by the fact that upper beams 3 are fastened by swivel-joint at the canopy ends 1.1.of the side modules 1 , which on the other side are also connected by the swivel - joint to the vertical rear links 4 with their other end also connected by a swivel joint with the short bases 5 fastened by a swivel-joint with their other end to the base ends 1.2.of the side modules 1.
At the end of the canopy 2.1 of the central module 2, a segmented caving shield 6 is mounted, having a main shield 6.1 on one side, con- nected by a swivel- joint to the canopy 2.1 of the central module 2 and connected by a swivel- joint on the other side to the main shield 6.1 , an inclinable shield 6.2 and a sliding shield 6.3. built inside the inclinable shield 6.2. The main guard 6.1.is supported by connected to it by a swivel - joint hydraulic cylinders 7, fastened with the other side by swivel-joint to the transverse beam 8 connecting bases 2.2.of the central module 2. The main shield 6.1. is also connected by a swivel joint with the tilt hydraulic cylinders 9 with its other end connected by a swivel joint with an inclina- ble shield 6.2. The inclinable shield 6.2. near its axis of rotation is con nected by a swivel joint with hydraulic cylinders of the extension 10, the other end of which is connected by a swivel joint to the end part of the sliding shield 6.3.
The main guard 6.1.is supported by connected to it by a swivel - joint hydraulic cylinders 7, fastened with the other side by swivel-joint to the transverse beam 8 connecting bases 2.2.of the central module 2. The main shield 6.1. is also connected by a swivel joint with the tilt hydraulic cylinders 9 with its other end connected by a swivel joint with an inclina ble shield 6.2. The inclinable shield 6.2. near its axis of rotation is con- nected by a swivel joint with hydraulic cylinders of the extension 10, the other end of which is connected by a swivel joint to the end part of the sliding shield 6.3.
The short bases 5 on the side opposite to their connection with the bases 1.2.of the side modules 1 are separately connected with a lower link 11. The vertical rear links 4 are separately connected with a horizontal link
12.
The upper side shield 13 is separately fastened to at least one upper beam 3 from the outside, and the lower side shield 14 is separately fastened to at least one short base 5 from the outside. The upper side shield 13 and the lower side shield 14 overlap each other.
Shields-chutes 15 are fastened to the upper beams 3 from the inside. On the upper surface of the upper beams 3 there are profile chutes 16.
There is a profile opening in the rear shield 2.3. of the central module, the profile of which results from the range of movements performed by the supporting hydraulic cylinder 7.
The arrangement of upper beams 3, vertical rear links 4, short bases 5 to gether with side modules 1 constitute a frame separating the outer zone of the roof support, according to the invention, from its central space.
The upper 13 and lower 14 side covers, fixed on one or both sides, pre- vent the falling rocks from reaching the central part of the roof support, according to the invention, on the conveyor.
Without harming the invention, as needed, the segmented caving shield 6 can only take the form of the main shield 6.1 or the main shield 6.1 connected to the tilting shield 6.2, or as shown in the example of execution, the main shield 6.1, together with the inclinable shield 6.2 and a sliding shield 6.3 built inside it.
The coal is collected from the longwall gate road in the rear part of the roof support, according to the invention, between the upper beams 3. The segmented caving shield 6 protects against uncontrolled coal or rock fall- ing onto the conveyor.
The segmented caving shield 6 in its initial position is situated parallel to the upper beams 3 - the inclinable shield 6.2 is parallel to the main guard 6.1 and the sliding shield 6.3 is extended.
In order to start collecting coal from the longwall gate road onto the con- veyor, slide down the sliding shield 6.3 with hydraulic cylinders of the extension 10, tilt the inclinable shield 6.2 using the tilt hydraulic cylin- ders 9, and then tilt the main shield 6.1 using supporting hydraulic cylin ders 7.
The sequence of actions can be any, depending on the needs. Blocking of coal pickup occurs in the reverse order. In addition, the segmented caving shield 6 has the possibility of deflecting above the surface of the upper beams 3.
List of markings in the drawing:
01 1 side modules
1.1 canopy
1.2 base
2 central module
05 2.1 canopy
2.2 base
2.3 rear shield
3 upper beam
4 vertical rear link
10 5 short base
6 segmented caving shield
6.1 main shield
6.2 inclinable shield
6.3 sliding shield
15 7 supporting hydraulic cylinder (for 6.1 )
8 transverse beam
9 tilt hydraulic cylinder (for 6.2)
10 hydraulic cylinder of the extension (for 6.3)
11 lower link
20 12 horizontal link
13 upper side shield
14 lower side shield
15 shield-chute
16 profile chute

Claims

Patent claims
01 1. The modular powered head gate support, with the recovery of coal from the longwall gate road in the top coal caving system of work, equipped with mutually parallel side modules and a central module, whereby each of the modules comprises the base, the canopy and legs be- 05 tween the canopy and the base, and a caving shield, which has a closed hole for discharging the output is fastened to the canopies ends of the side modules, whereas the conveyor runs centrally along the modular roof support, characterized in that upper beams (3) are fastened by swivel- joint at the canopy ends (1.1) of the side modules (1) and the beams on 10 the other side are also connected by the swivel -joint to the vertical rear links (4) with their other end also connected by a swivel joint with the short bases (5) fastened by a swivel-joint with their other end to the base ends (1.2)of the side modules 1 , whereas at the end of the canopy (2.1) of the central module (2), a segmented caving shield (6) is mounted, having 15 a main shield (6.1 ) on one side connected by a swivel- joint to the canopy (2.1) of the central module (2) and connected by a swivel- joint on the other side to the main shield 6.1, an inclinable shield (6.2) and a sliding shield (6.3.)built inside the inclinable shield (6.2.), whereby the main guard (6.1.)is supported by connected to it by a swivel -joint hydraulic 20 cylinders (7), fastened with the other side by swivel-joint to the transverse beam 8 connecting bases (2.2.)of the central module (2). The main shield (6.1.) is also connected by a swivel joint with the tilt hydraulic cylinders (9) with its other end connected by a swivel joint with an inclinable shield (6.2.). The inclinable shield (6.2.) near its axis of rotation is con- 5 nected by a swivel joint with hydraulic cylinders of the extension (10), the other end of which is connected by a swivel joint to the end part of the sliding shield (6.3).
2. The modular powered head gate support, according to claim 1 characterized in that the short bases (5) on the side opposite to their connec- tion with the bases (1.2.)of the side modules (10 are separately connected with a lower link (11).
3. The modular powered head gate support, according to claim 1 characterized in that the vertical rear links (4 ) are separately connected with a horizontal link (12).
4.The modular powered head gate support, according to claim 1 characterized in that the upper side shield (13) is separately fastened to at least one upper beam (3) from the outside, and the lower side shield (14) is separately fastened to at least one short base (5) from the outside. The up per side shield (13) and the lower side shield (14) overlap each other.
5. The modular powered head gate support, according to claim 1 characterized in that shields-chutes (15) are fastened to the upper beams (3) from the inside.
6.The modular powered head gate support, according to claim 1 characterized in that on the upper surface of the upper beams (3) there are pro- file chutes (16).
7. The modular powered head gate support, according to claim 1 characterized in that there is a profile opening in the rear shield (2.3.) of the central module (2), the profile of which results from the range of movements performed by the supporting hydraulic cylinder (7).
PCT/PL2022/000038 2021-07-06 2022-06-27 Modular mining powered head gate support with the recovery of coal from a main gate in the top coal caving system of work WO2023282774A1 (en)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
PLP.438366 2021-07-06
PL438366A PL245312B1 (en) 2021-07-06 2021-07-06 Modular mining powered roof support for an intersection with coal recovery from a gate road in sublevel caving

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WO2023282774A1 true WO2023282774A1 (en) 2023-01-12

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Citations (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE3716993A1 (en) * 1987-05-21 1988-12-01 Passing Maschinenbau Gmbh & Co Multiple-member support for underground operation, in particular a support shield
PL315140A1 (en) * 1996-07-05 1998-01-19 Kopalnia Wegla Kamiennego Stas Roof support in filled longwall headings and method of supporting roofs in such headings
CN208106471U (en) * 2017-12-22 2018-11-16 郑州合新科技有限公司 Convenient for discharging the single pendulum beam hydraulic support of top coal

Patent Citations (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE3716993A1 (en) * 1987-05-21 1988-12-01 Passing Maschinenbau Gmbh & Co Multiple-member support for underground operation, in particular a support shield
PL315140A1 (en) * 1996-07-05 1998-01-19 Kopalnia Wegla Kamiennego Stas Roof support in filled longwall headings and method of supporting roofs in such headings
CN208106471U (en) * 2017-12-22 2018-11-16 郑州合新科技有限公司 Convenient for discharging the single pendulum beam hydraulic support of top coal

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PL438366A1 (en) 2021-12-13

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