WO2020227780A1 - Mining apparatus - Google Patents
Mining apparatus Download PDFInfo
- Publication number
- WO2020227780A1 WO2020227780A1 PCT/AU2020/050482 AU2020050482W WO2020227780A1 WO 2020227780 A1 WO2020227780 A1 WO 2020227780A1 AU 2020050482 W AU2020050482 W AU 2020050482W WO 2020227780 A1 WO2020227780 A1 WO 2020227780A1
- Authority
- WO
- WIPO (PCT)
- Prior art keywords
- supports
- movable member
- brow
- carrier
- flow
- Prior art date
Links
- 238000005065 mining Methods 0.000 title description 13
- 230000002787 reinforcement Effects 0.000 claims abstract description 13
- 239000000969 carrier Substances 0.000 claims description 22
- 239000002245 particle Substances 0.000 claims description 21
- 239000011435 rock Substances 0.000 claims description 17
- 238000000034 method Methods 0.000 description 9
- 238000009434 installation Methods 0.000 description 8
- 229910000831 Steel Inorganic materials 0.000 description 7
- 239000010959 steel Substances 0.000 description 7
- 238000004519 manufacturing process Methods 0.000 description 6
- 230000008901 benefit Effects 0.000 description 4
- 239000002360 explosive Substances 0.000 description 4
- 239000000463 material Substances 0.000 description 4
- 230000007246 mechanism Effects 0.000 description 4
- 238000005299 abrasion Methods 0.000 description 3
- 230000033228 biological regulation Effects 0.000 description 2
- 230000005540 biological transmission Effects 0.000 description 2
- 239000004567 concrete Substances 0.000 description 2
- 230000000694 effects Effects 0.000 description 2
- 239000000945 filler Substances 0.000 description 2
- 238000011065 in-situ storage Methods 0.000 description 2
- 239000000314 lubricant Substances 0.000 description 2
- 238000012423 maintenance Methods 0.000 description 2
- 229910052751 metal Inorganic materials 0.000 description 2
- 239000002184 metal Substances 0.000 description 2
- 238000012986 modification Methods 0.000 description 2
- 230000004048 modification Effects 0.000 description 2
- 230000001105 regulatory effect Effects 0.000 description 2
- 239000011378 shotcrete Substances 0.000 description 2
- 125000006850 spacer group Chemical group 0.000 description 2
- 230000004888 barrier function Effects 0.000 description 1
- 238000009412 basement excavation Methods 0.000 description 1
- 238000010276 construction Methods 0.000 description 1
- 238000005520 cutting process Methods 0.000 description 1
- 238000006073 displacement reaction Methods 0.000 description 1
- 230000007717 exclusion Effects 0.000 description 1
- 238000000605 extraction Methods 0.000 description 1
- 239000006260 foam Substances 0.000 description 1
- 239000008187 granular material Substances 0.000 description 1
- 230000005484 gravity Effects 0.000 description 1
- 231100001261 hazardous Toxicity 0.000 description 1
- 238000003780 insertion Methods 0.000 description 1
- 230000037431 insertion Effects 0.000 description 1
- 238000011900 installation process Methods 0.000 description 1
- 238000002955 isolation Methods 0.000 description 1
- 230000014759 maintenance of location Effects 0.000 description 1
- 229910001092 metal group alloy Inorganic materials 0.000 description 1
- 150000002739 metals Chemical class 0.000 description 1
- 239000011236 particulate material Substances 0.000 description 1
- 238000007747 plating Methods 0.000 description 1
- 230000001681 protective effect Effects 0.000 description 1
- 238000011084 recovery Methods 0.000 description 1
- 239000011150 reinforced concrete Substances 0.000 description 1
- 230000008439 repair process Effects 0.000 description 1
- 238000005096 rolling process Methods 0.000 description 1
- 239000007787 solid Substances 0.000 description 1
- 238000012358 sourcing Methods 0.000 description 1
- 230000003068 static effect Effects 0.000 description 1
- 238000013519 translation Methods 0.000 description 1
Classifications
-
- E—FIXED CONSTRUCTIONS
- E21—EARTH OR ROCK DRILLING; MINING
- E21F—SAFETY DEVICES, TRANSPORT, FILLING-UP, RESCUE, VENTILATION, OR DRAINING IN OR OF MINES OR TUNNELS
- E21F17/00—Methods or devices for use in mines or tunnels, not covered elsewhere
-
- E—FIXED CONSTRUCTIONS
- E21—EARTH OR ROCK DRILLING; MINING
- E21C—MINING OR QUARRYING
- E21C41/00—Methods of underground or surface mining; Layouts therefor
- E21C41/16—Methods of underground mining; Layouts therefor
- E21C41/22—Methods of underground mining; Layouts therefor for ores, e.g. mining placers
-
- 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
-
- E—FIXED CONSTRUCTIONS
- E21—EARTH OR ROCK DRILLING; MINING
- E21F—SAFETY DEVICES, TRANSPORT, FILLING-UP, RESCUE, VENTILATION, OR DRAINING IN OR OF MINES OR TUNNELS
- E21F13/00—Transport specially adapted to underground conditions
- E21F13/08—Shifting conveyors or other transport devices from one location at the working face to another
- E21F13/086—Armoured conveyors shifting devices
Definitions
- the draw point 105 will be part of a tunnel having a rock roof 110 (which may be reinforced).
- the roof leads to the raise 104 below the drawbell 103, typically ending at a draw point brow 111.
- a worn, or damaged brow is undesirable as it may cause the roof 110 at the draw point 107 to collapse and/or cause damage to the structure of the drawbell 103.
- the movable member is rotatably connected to the carrier.
- Figs. 10, 11 and 12 are orthogonal projections of the example support of Fig. 9;
- Figs. 18 to 20 are orthogonal projections of the example leg of Fig. 17;
- Figs. 25 to 27 are orthogonal projections of the guard of Fig. 24;
- FIGs. 28 and 29 illustrate another example of the system to reinforce the draw point brow
- Fig. 33 is an end view of the system shown in Fig. 32;
- Fig. 34 is another end view of the system shown in Fig. 33 with hidden detail;
- Fig. 35 is a side cross-section of the system in Fig. 34;
- Fig. 36 is an isometric view of a support in the system in Fig. 32;
- Fig. 40 is a perspective view of a section of a mine with yet another example of a system to regulate flow of ore from a drawbell, wherein the system further includes a door;
- Fig. 41 is a side view of the system of Fig. 40 with the door in an open configuration
- the system 1 includes a first support 9 and a second support 11 that are mounted at respective opposing walls 107, 109 of the mine and proximal to a draw point brow 111.
- the system 1 also includes a movable member 3 having a first end 5 opposite a second end 7. Each of the first end 5 and second end 7 are movably connected to a respective one of the first support 9 and second support 11.
- the movable member 3 is movable relative to the first and second supports 9, 11. This may be advantageous in reducing the transmission of impact forces from the flow of ore 101 to the supports 9, 11. Since the supports 9, 11 are mounted to the mine wall 107, 109 (or in some case in addition, or alternative, mounted to the roof 110 or floor 108), reducing the transmission of forces may reduce damage to surrounding rock structure in the mine 106. The movable member 3 may also result in a longer operational life of the system compared to other systems that have rigid structures.
- the movable member 3 may be movably connected in one or more ways.
- the movable member 3 has a rotatable connection with the supports 9, 11. This allows the movable member 3 to rotate to assist the flow of ore 101.
- the movable member 3 is in a slidable connection with the first and second supports 9, 11. This allows translation movement (i.e. displacement) of the movable member 3 to avoid a rigid connection.
- the feature of a movable member 3 may be particularly advantageous where large pieces of ore may otherwise be jammed against the movable member 3.
- the movable member 3 may also act as reinforcement.
- the moveable member 3 may reinforce the draw point brow 111 by acting as a shield to absorb impact and wear from the flow of ore 101.
- Figs. 9 to 12 illustrate a first support 9.
- the structure of the first support 9 is substantially identical features to the second support 11 (but in a mirror image).
- the support 9, 11 comprises a support body 19 that includes a rail or slot 13.
- the rail or slot 13 allow, at least in part, captive movement of the movable member 3.
- an open C-shaped slot 13 is formed to slidably receive part of the carrier 23.
- the C-shaped slot 13, in this example, is substantially linear along a length 15 to allow the slidable connection to move along the length 15.
- the support 9, 11 has one, or more, rails as part of the movable connection between the movable member and the support 9, 11.
- the carrier or movable member is slidably connected to the rail.
- other forms of movable connections may be used between the supports 9, 11 and the movable member. This may include wheels (including rollers) at the support to assist movement of the movable member and/or carrier.
- the support 9, 11 also includes a stop 17 to limit movement of the movable member 3 and carrier 23 in the slot 13. In this example a single stop 17 is provided at one end of the slot 13. It is to be appreciated that one or more additional stops may be provided in the slot 13, such as at an opposite end to the first stop.
- the movable member 3 is a pipe having a first end 5 and an opposite second end 7.
- the pipe construction has a number of benefits. Firstly, the pipe has a cylindrical outer surface that aides movement and reduces friction of the ore across the outer surface. Secondly, the pipe shape allows rotation of the movable member 3 relative to the support 9, 11 and/or carrier 23. Furthermore the pipe shape has a better strength to weight ratio compared to a solid cylindrical bar.
- the movable member 3 is a steel pipe. This has the advantage of ease of manufacture or sourcing from commercially available pipes. Furthermore, steel pipe is resilient and has good impact resistance. The size of the pipe, including the thickness of the pipe walls, can be selected based on the requirements for the mine. In some examples, the pipe may be filled with material, such as concrete, to increase strength of the movable member 3. In other examples, the movable member 3 is constructed of reinforced concrete.
- the movable member 13 may be a bar, or a flat plate, that is received in opposing slots 13 of the supports 9, 11. It is to be appreciated other examples may include such I-beams, bars, flat plates that are carried by an intermediate element such as the carrier 23.
- the movable member 13 may include square cross-section bar stock with turned opposing ends 5, 7 such that the ends are cylindrical to allow rotation of the movable member 13 in the carrier 23.
- the carrier will now be described with reference to Figs. 13 to 16.
- the function of the carrier 23 is to facilitate movement of the movable member 3 relative to the support 9, 11.
- the carrier can reduce friction and/or reduce wear between the support 9, 11 and the movable member 3.
- the system 1 has two carriers 23, a first carrier 25 to connect the first end to the slot 13 of the first support 9, and a second carrier 27 to connect the second end 7 to the slot 13 of the second support 11.
- Each of the first carrier 25 and second carrier 27 in this example is formed by two carrier bodies 51.
- the carrier body 51 includes an arcuate bearing surface 53 to connect with respective ends 5, 7 of the movable member.
- each carrier body 51 is one of two halves, and when the carrier is located along the length 15 of the rail or slot 13, the arcuate bearing surfaces 53 face one another to receive the cylindrical ends 5, 7.
- the arcuate bearing surface 53 allows the movable member 3 to be rotatably connected to the carrier 23 and, in turn, the supports 9, 11. Furthermore the carrier body 51 has external surfaces to match and slide with the rail or slot 13 of the supports such that there is a slidable connection between the movable member 3 and the supports 9, 11.
- the carrier body 51 may also include apertures 55.
- the apertures 55, along with apertures 21, can be used with fasteners to lock the carrier 23 to the support 9, 11. This can be used temporarily to stop movement of the movable member 3 along the length 15.
- Advantages can include locking the movable member 3 during installation and maintenance activities to reduce risks of accidents.
- some alternative examples include a common carrier that spans between the first support 9 and second support 11. Legs 31
- the legs 31 are separately manufactured components that are mounted to respective first and second supports 9, 11. This may include using fasteners through mounting apertures 24, 36 in the respective support 9, 11 and legs 31. Detaching the legs 31 to the supports 9, 11 can assist in ease of transportation of the components of the system 1 to the draw point 105.
- the legs 31 may be formed of multiple subcomponents of a relatively shorter length, wherein assembly of the components form a sufficient length between the floor 108 to the supports 9, 11.
- the legs 31 are adjustable in length, which may include a screw jack to facilitate adjustment.
- Figs. 24 to 27 illustrate a guard 33 to protect the legs 31.
- the guards are located proximal to the feet 35 of the legs 31.
- the guards 33 are spaced from the legs 31 to provide a crumple zone 37. This can assist in reducing the effect of impact, such as from a mining vehicle or tool, that may otherwise dislodge the legs 31 and system 1.
- the use of guards 33 can be useful in environments that include autonomous vehicles, where the guards 33 may also serve as markers for navigation.
- the system 1 is installed by positioning the first and second supports 9, 11 at respective locations at walls 107, 109 proximal to the draw point brow 11.
- the supports 9, 11 are secured at these locations by either, or combinations of, rock bolts 41, cable bolts, and legs 31. If required, the location of the supports 9, 11 may be adjusted by changing the height of the legs 31 and or locating pads/spacers between the feet 35 and the floor 108.
- additional stops 17’ can be provided to limit movement of the movable member 3 at the opposite end of the rail 13 to stop 17. That is, allowing captive movement of the carriers 25, 27 within the rail 13 between locations shown in Figs. 5, 6 and 7and preventing the carriers 25, 27 from exiting the rail (as shown in Fig. 8).
- the movable member 3 which is a wear part subject to abrasion and impact from the flow of ore, can be replaced without dismantling the entire system 1 from the draw point 105.
- the supports 9, 11 and the legs 31 can remain in place.
- a replacement movable member 3 can be inserted quickly to minimise downtime.
- the movable member 3 is removed in a direction away from the drawbell 103. This reduces risks to the operator and/or machinery by minimising exposure to the area near the draw point brow 111 that is subject to hazardous flow of ore.
- the movable member 3 may move away from the draw point brow 111.
- the movement is in a horizontal direction. This degree of movement can reduce the instance of ore being blocked, or held up, which can assist the flow into the draw point 105.
- the movable member 3 can rotate in the carrier 23 which can further assist preventing blockages by acting as a free turning roller.
- this includes the movable member 3 fixed in a specified location (such as that shown in Fig. 5), whereby rolling movement assists flow of the ore.
- a biasing mechanism is provided to bias the movable member 3 towards proximal to the draw point brow 111 and respective stop 17.
- the biasing mechanism may include a mechanical spring, such as a coil spring or leaf spring.
- the biasing mechanism may include pneumatic or hydraulic systems to push the movable member 3 back towards the draw point brow 111.
- one or more stops 17, 17’ are provided to limit movement of the carrier 23 between the position shown in Fig. 5 (where the carrier 23 is proximal to the draw point brow 111, and the position shown in Fig. 7 (where the carrier 23 is away from the draw point brow 111). As illustrated in Figs. 5 to 7, this range ensures that the carrier 23, and thus the movable member 3, are adequately supported by the first and second supports 9, 11 throughout the range of movement.
- movable member 3 is slid into the rail or slot 13 and fixed at a location relative to the supports 9, 11. This may include providing fasteners 80 through aperture 21 and 55 to secure the carrier 23 to the supports 9,11. In this configuration, the movable member 3 is rotatably connected to the carrier 23 to assist the flow of ore and to reinforce the draw point (105). For maintenance or replacement, the fasteners 80 may be selectively removed to allow the carrier 23 and movable member 3 to be repositioned or removed from the rail or slot 13. A second example implementing this is described below.
- a second example of the system 401 includes a movable member 3 that is supported at both ends 5, 7 by a carrier 23 (formed by carrier bodies 51).
- the carriers 23, are fixed relative to the walls 107, 109 with first and second supports 409, 411. Similar to the first example, the first and second supports 409, 411 have slots 413 to receive the carriers 23.
- the carriers 23 are then fixed in position, such as with fasteners 80 fixing the carriers 23 the respective supports 409, 411.
- this allows a degree of adjustment so that the supports 409, 411 do not need to be placed in a precise location.
- the movable member 3 is rotatable to assist and regulate the flow of ore 101 and/or to protect the draw point brow 111.
- the fasteners 80 fixing the carriers 23 to the supports 409, 411 prevent the movable member 3 from sliding out of the selected during use.
- This example also includes a mesh screen 473 to inhibit flow of ore 101 above the movable member 3.
- the mesh screen 473 is clamped in place by a mesh screen plate 471 and mesh screen support flange 475.
- the support 409 as illustrated in Fig. 36, includes a slot 13 to receive the carriers 23 and a plurality of apertures 21 to receive one or more fasteners 80 to secure the carriers 23 at a desired location.
- the support 409 also includes a mesh screen support flange 475 that can, at least in part, also function as a gusset to support the surfaces of the slot 13.
- the mesh support flange 475 has one more apertures 475 to receive bolts to assist clamping of the mesh screen 473.
- the support 409 can also include other features of the support 9, 11 described above.
- the support 411 may be a mirror image of the support 409 illustrated in Fig. 36.
- the mesh screen plate 471 includes a substantially flat plate to form one half of a clamp to clamp the mesh screen 473.
- the mesh screen plate 471 includes one or more apertures 472 that match the apertures 476 in the mesh support flange 475.
- Fasteners, such as a nut and bolt passing through apertures 472, 476 can be used to assemble the mesh screen plate 471 and mesh support flange 475 such that the mesh screen 473 is clamped in between.
- Installation of the system 401 can be similar to the above examples, with the exception of fixing the carrier 23 and the mesh screen 473.
- the supports 409, 411 are fixed directly to the walls 107, 109 but it is to be appreciated that modifications can include legs 31 extending to the floor 108.
- the carriers 23 are slid into the slots 413 until the movable member 3 is at, or close to, a desired location relative to the brow 111.
- a minor gap 420 may be present between the walls 107, 109 and the supports 409, 411. This is because the walls 107,109 that are formed from excavation are not perfectly smooth and flat and where practicalities of tunnelling are such that perfect and consistent tunnel widths are not possible.
- the gap 420 is filled with shotcrete or other fillers.
- the filler may be one of the final steps of installation, whilst in other examples this can be done earlier such as after installation of the supports but before insertion of the carriers 23 and movable members 3.
- foam, shield or other materials may be placed around parts such as fasteners and other surfaces to provide a protective barrier to shotcrete.
- the mesh screen 473 can be placed by positioning in the desired location adjacent to the mesh support flange 475 and then clamping the mesh screen 473 in place with the mesh screen plate 471.
- the movable member 3 is connected to at least one of the supports by a pivotable (i.e. hinged) connection.
- a first end 5 of the movable member 3 is hinged to a first support 9, and the second end 7 of the movable member 3 is slidingly received in a slot 13 of the second support 11.
- Figs. 28 and 29 illustrate an alternative configuration of the system 201 to reinforce the draw point brow 111.
- a movable member 3 is connected to the supports 9, 11 such that the member 3 moves vertically (i.e. in a direction between the rock roof 110 and floor 108.
- gravity biases the movable member 3 towards the floor 108, whereby the movable member 3 can provide reinforcement and protection to the draw point brow 111 and/or regulate the flow of ore.
- the system 1 can be configured for the movable member 3 to move in not only a vertical or horizontal direction, but a combination of the two. This may be provided by have a sloped rail 13, or even an arcuate rail 13.
- Fig. 31 illustrates an alternative system 301, to regulate a flow of particles 302 into a collection zone 305 and/or to reinforce a brow 311 of the collection zone 305.
- the flow of particles 302 generally flow to the collection zone 305, whereby particles are collected from the collection zone 305 via a conveyor belt 350.
- the flow of particles 302 needs to be regulated. This can be achieved by having a brow 311 to ensure only a certain level of particles 302 can flow into the collection zone 305. However a static brow will, over time, be worn by the flow of particles 302.
- the system 301 includes first and second supports 9, 11 mounted at opposing walls 307 of the collection zone 305.
- the supports 9, 11 support a movable member 3 that operates similar to the movable member in the systems 1, 201 described above.
- the movable member 3 absorbs impact and abrasion from the particles as well as regulating the amount of particles flowing into the collection zone 305.
- the flow of particles 302 to the collection zone 305 is supplied via a funnel or hopper (not illustrated). of a system with a door and vertical adjustment of the moveable member
- Some of the above described examples include a system 1 where the movable member 3 slides into a substantially horizontal rail or slot 13.
- the movable member 3 may be vertically adjusted into position as illustrated in the example system 601 illustrated in Figs. 40 to 43.
- the system includes supports 609, 611 with, when in situ, vertically orientated slots 13.
- the vertically orientated slots 13 allow the carrier 23 and corresponding moveable member 3 to be adjusted vertically into a desired location after which fasteners 80 can be used to fix the moveable member 3 in place.
- the carrier 23 can allow the moveable member 3 to rotate relative to the supports 609, 611 to assist in regulation of flow of ore.
- the example system 601 further includes a door 690 to stop, or otherwise mitigate, further flow of ore.
- the door 690 is an isolation mechanism to isolate parts of the mine - for example during an explosive event or when ore extraction is not required.
- the door 690 can be used in routine use to further regulate the ore from flowing into the tunnel.
- the door 690 is hinged and may be selectively configured by an actuator 692 between an open configuration, as illustrated in Fig. 41, and a closed configuration, as illustrated in Fig. 42.
- the door 690 opens away from the drawbell and brow 111.
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- Engineering & Computer Science (AREA)
- Mining & Mineral Resources (AREA)
- Life Sciences & Earth Sciences (AREA)
- Geochemistry & Mineralogy (AREA)
- Geology (AREA)
- General Life Sciences & Earth Sciences (AREA)
- Environmental & Geological Engineering (AREA)
- Remote Sensing (AREA)
- Combined Means For Separation Of Solids (AREA)
Abstract
Description
Claims
Priority Applications (2)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
AU2020273388A AU2020273388A1 (en) | 2019-05-15 | 2020-05-15 | Mining apparatus |
AU2020103962A AU2020103962B4 (en) | 2019-05-15 | 2020-12-08 | Mining apparatus |
Applications Claiming Priority (2)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
AU2019901661 | 2019-05-15 | ||
AU2019901661A AU2019901661A0 (en) | 2019-05-15 | Mining apparatus |
Publications (1)
Publication Number | Publication Date |
---|---|
WO2020227780A1 true WO2020227780A1 (en) | 2020-11-19 |
Family
ID=73290092
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
PCT/AU2020/050482 WO2020227780A1 (en) | 2019-05-15 | 2020-05-15 | Mining apparatus |
Country Status (2)
Country | Link |
---|---|
AU (1) | AU2020273388A1 (en) |
WO (1) | WO2020227780A1 (en) |
Citations (6)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
CN101798935A (en) * | 2010-01-21 | 2010-08-11 | 北京诚田恒业煤矿设备有限公司 | Transverse self-moving combined suspension hydraulic bracket |
CN101798927A (en) * | 2010-04-01 | 2010-08-11 | 中国矿业大学 | Near infrared spectral recognizing coal gangue and gangue content control method |
CN102720499A (en) * | 2012-06-29 | 2012-10-10 | 中国矿业大学 | Fully-mechanized top-coal caving, filling and mining method |
RU2709903C1 (en) * | 2019-04-15 | 2019-12-23 | Федеральное государственное бюджетное научное учреждение "Федеральный исследовательский центр угля и углехимии Сибирского отделения Российской академии наук" (ФИЦ УУХ СО РАН) | Method for development of powerful steep bed with discharge of coal of overlying formation |
RU2709894C1 (en) * | 2019-05-29 | 2019-12-23 | Федеральное государственное бюджетное научное учреждение "Федеральный исследовательский центр угля и углехимии Сибирского отделения Российской академии наук" (ФИЦ УУХ СО РАН) | Powered support section with coal discharge device |
RU2709904C1 (en) * | 2019-03-21 | 2019-12-23 | Федеральное государственное бюджетное научное учреждение "Федеральный исследовательский центр угля и углехимии Сибирского отделения Российской академии наук" (ФИЦ УУХ СО РАН) | Method for development of a thick gently sloping bed with release of coal of underburden thickness |
-
2020
- 2020-05-15 AU AU2020273388A patent/AU2020273388A1/en active Pending
- 2020-05-15 WO PCT/AU2020/050482 patent/WO2020227780A1/en active Application Filing
Patent Citations (6)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
CN101798935A (en) * | 2010-01-21 | 2010-08-11 | 北京诚田恒业煤矿设备有限公司 | Transverse self-moving combined suspension hydraulic bracket |
CN101798927A (en) * | 2010-04-01 | 2010-08-11 | 中国矿业大学 | Near infrared spectral recognizing coal gangue and gangue content control method |
CN102720499A (en) * | 2012-06-29 | 2012-10-10 | 中国矿业大学 | Fully-mechanized top-coal caving, filling and mining method |
RU2709904C1 (en) * | 2019-03-21 | 2019-12-23 | Федеральное государственное бюджетное научное учреждение "Федеральный исследовательский центр угля и углехимии Сибирского отделения Российской академии наук" (ФИЦ УУХ СО РАН) | Method for development of a thick gently sloping bed with release of coal of underburden thickness |
RU2709903C1 (en) * | 2019-04-15 | 2019-12-23 | Федеральное государственное бюджетное научное учреждение "Федеральный исследовательский центр угля и углехимии Сибирского отделения Российской академии наук" (ФИЦ УУХ СО РАН) | Method for development of powerful steep bed with discharge of coal of overlying formation |
RU2709894C1 (en) * | 2019-05-29 | 2019-12-23 | Федеральное государственное бюджетное научное учреждение "Федеральный исследовательский центр угля и углехимии Сибирского отделения Российской академии наук" (ФИЦ УУХ СО РАН) | Powered support section with coal discharge device |
Also Published As
Publication number | Publication date |
---|---|
AU2020273388A1 (en) | 2021-12-16 |
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