CN112012665A - Full-hydraulic automatic roof connecting device and method for intelligent anchor rod drill frame - Google Patents
Full-hydraulic automatic roof connecting device and method for intelligent anchor rod drill frame Download PDFInfo
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- CN112012665A CN112012665A CN202010813377.4A CN202010813377A CN112012665A CN 112012665 A CN112012665 A CN 112012665A CN 202010813377 A CN202010813377 A CN 202010813377A CN 112012665 A CN112012665 A CN 112012665A
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- top connection
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- 238000000034 method Methods 0.000 title claims abstract description 12
- 230000007246 mechanism Effects 0.000 claims abstract description 17
- 238000005553 drilling Methods 0.000 claims description 34
- 230000008859 change Effects 0.000 claims description 7
- 230000009471 action Effects 0.000 claims description 4
- 230000001502 supplementing effect Effects 0.000 claims description 2
- 239000003245 coal Substances 0.000 abstract description 4
- 239000003921 oil Substances 0.000 description 58
- 230000008569 process Effects 0.000 description 3
- 230000005641 tunneling Effects 0.000 description 3
- 239000010720 hydraulic oil Substances 0.000 description 2
- 239000011435 rock Substances 0.000 description 2
- 101100194817 Caenorhabditis elegans rig-6 gene Proteins 0.000 description 1
- 238000004873 anchoring Methods 0.000 description 1
- 238000009412 basement excavation Methods 0.000 description 1
- 238000010276 construction Methods 0.000 description 1
- 238000010586 diagram Methods 0.000 description 1
- 230000036541 health Effects 0.000 description 1
- 230000006872 improvement Effects 0.000 description 1
- 238000012544 monitoring process Methods 0.000 description 1
- 230000000007 visual effect Effects 0.000 description 1
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Classifications
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- E—FIXED CONSTRUCTIONS
- E21—EARTH OR ROCK DRILLING; MINING
- E21B—EARTH OR ROCK DRILLING; OBTAINING OIL, GAS, WATER, SOLUBLE OR MELTABLE MATERIALS OR A SLURRY OF MINERALS FROM WELLS
- E21B15/00—Supports for the drilling machine, e.g. derricks or masts
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- E—FIXED CONSTRUCTIONS
- E21—EARTH OR ROCK DRILLING; MINING
- E21D—SHAFTS; TUNNELS; GALLERIES; LARGE UNDERGROUND CHAMBERS
- E21D20/00—Setting anchoring-bolts
- E21D20/003—Machines for drilling anchor holes and setting anchor bolts
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F15—FLUID-PRESSURE ACTUATORS; HYDRAULICS OR PNEUMATICS IN GENERAL
- F15B—SYSTEMS ACTING BY MEANS OF FLUIDS IN GENERAL; FLUID-PRESSURE ACTUATORS, e.g. SERVOMOTORS; DETAILS OF FLUID-PRESSURE SYSTEMS, NOT OTHERWISE PROVIDED FOR
- F15B11/00—Servomotor systems without provision for follow-up action; Circuits therefor
- F15B11/16—Servomotor systems without provision for follow-up action; Circuits therefor with two or more servomotors
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F15—FLUID-PRESSURE ACTUATORS; HYDRAULICS OR PNEUMATICS IN GENERAL
- F15B—SYSTEMS ACTING BY MEANS OF FLUIDS IN GENERAL; FLUID-PRESSURE ACTUATORS, e.g. SERVOMOTORS; DETAILS OF FLUID-PRESSURE SYSTEMS, NOT OTHERWISE PROVIDED FOR
- F15B13/00—Details of servomotor systems ; Valves for servomotor systems
- F15B13/02—Fluid distribution or supply devices characterised by their adaptation to the control of servomotors
- F15B13/06—Fluid distribution or supply devices characterised by their adaptation to the control of servomotors for use with two or more servomotors
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F15—FLUID-PRESSURE ACTUATORS; HYDRAULICS OR PNEUMATICS IN GENERAL
- F15B—SYSTEMS ACTING BY MEANS OF FLUIDS IN GENERAL; FLUID-PRESSURE ACTUATORS, e.g. SERVOMOTORS; DETAILS OF FLUID-PRESSURE SYSTEMS, NOT OTHERWISE PROVIDED FOR
- F15B21/00—Common features of fluid actuator systems; Fluid-pressure actuator systems or details thereof, not covered by any other group of this subclass
- F15B21/02—Servomotor systems with programme control derived from a store or timing device; Control devices therefor
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- Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- Mining & Mineral Resources (AREA)
- Physics & Mathematics (AREA)
- Fluid Mechanics (AREA)
- General Engineering & Computer Science (AREA)
- Life Sciences & Earth Sciences (AREA)
- Geology (AREA)
- General Life Sciences & Earth Sciences (AREA)
- Geochemistry & Mineralogy (AREA)
- Chemical & Material Sciences (AREA)
- Environmental & Geological Engineering (AREA)
- Analytical Chemistry (AREA)
- Structural Engineering (AREA)
- Earth Drilling (AREA)
Abstract
The invention belongs to the technical field of intelligent anchor rod drill rigs in coal mines, and particularly relates to a full-hydraulic automatic jacking device and an automatic jacking method for an intelligent anchor rod drill rig. The automatic top-contacting problem is solved, the automatic top-contacting device comprises a large arm telescopic mechanism, a large arm lifting oil cylinder, a drill stand leveling oil cylinder, a large arm base, a drill stand connecting seat, a drill stand, a rotary oil cylinder, a swing oil cylinder connecting lug, a large arm rotary pin shaft, a swing oil cylinder and a hydraulic top-contacting device, wherein one end of the large arm telescopic mechanism is installed on the large arm base, the large arm base is provided with the large arm rotary pin shaft, two sides of the large arm base are provided with the swing oil cylinder connecting lug connected with the swing oil cylinder, the large arm lifting oil cylinder is connected between the large arm base and the large arm telescopic mechanism, the other end of the large arm telescopic mechanism is hinged with the drill stand connecting seat, the drill stand leveling oil cylinder is connected between the drill stand connecting seat and the large arm telescopic mechanism, the drill stand is installed on the drill stand connecting seat through the rotary oil cylinder, the swing oil.
Description
Technical Field
The invention belongs to the technical field of intelligent anchor rod drill rigs in coal mines, and particularly relates to a full-hydraulic automatic jacking device and an automatic jacking method for an intelligent anchor rod drill rig.
Background
The intelligent anchor rod drill carriage is an intelligent device which is provided by the current intelligent construction mine and can realize automatic pace-fixing, automatic positioning, automatic net laying, automatic drilling, automatic charging, anchor rod feeding, anchor rod fastening and continuous anchor rod supply, and has the functions of anchor drill parameter setting, automatic resetting, local/remote control operation, visual monitoring and the like, and is applied to anchor rod support in the process of coal mine roadway tunneling. The device is used for tunneling a working face, workers can be released from heavy physical labor, the workers are far away from the working face to ensure safety, the working environment is improved, and the health of the workers is fully ensured. The development of the full-automatic two-arm anchor rod drill carriage has important significance for improving the automation level of roadway excavation, reducing the supporting working strength, improving the supporting safety and supporting efficiency and reducing anchor protection personnel, and is also an urgent need of the market.
The intelligent anchor rod drill frame is used for achieving automatic positioning, automatic drilling, automatic charging, anchor rod feeding, anchor rod fastening and continuous feeding of the anchor rod, the whole lifting of the drill frame can be achieved through the large-arm lifting oil cylinder, the drill frame can rotate left and right integrally through the connection of the rotating oil cylinder and the working arm, and up-down and inside-outside swinging can be achieved through the leveling oil cylinder and the swinging oil cylinder. When the drilling rig is used for automatically operating the top anchor and the side anchor in the underground, the anchor rods are required to be positioned in a row, a certain distance is kept between the anchor rods, and the drilling rig must be kept in a top-contacting or side-contacting state with a top plate or a side wall when the drilling rig automatically punches, so that automatic top-contacting judgment is particularly important in the working and operation of the drilling rig of the intelligent two-arm anchor rod drilling rig. Along with the improvement of the requirements on the speed and the automation of the tunneling anchoring and protecting system, higher requirements are also put forward on an automatic roof-contacting system, and the automatic roof-contacting device must be required to be more reliable and more accurate. In order to achieve the aim, the full-automatic roof connecting device of the intelligent anchor rod drilling frame is designed.
Disclosure of Invention
The invention provides an intelligent full-hydraulic automatic roof connecting device and an automatic roof connecting method for a rock bolt drill frame, aiming at solving the problem that automatic roof connecting of the drill frame is realized in the automatic positioning and automatic bolting joining processes of a full-automatic rock bolting machine under a coal mine
The invention adopts the following technical scheme: an intelligent full-hydraulic automatic jacking device for an anchor rod drill stand comprises a large arm telescopic mechanism, a large arm lifting oil cylinder, a drill stand leveling oil cylinder, a large arm base and a drill stand connecting seat, the drilling rig comprises a drilling rig body, a rotary oil cylinder, swing oil cylinder connecting lugs, a large arm rotary pin shaft, a swing oil cylinder and a hydraulic jacking device, wherein one end of a large arm telescopic mechanism is installed on a large arm base, the large arm rotary pin shaft is arranged on the large arm base, the swing oil cylinder connecting lugs connected with the swing oil cylinder are arranged on two sides of the large arm base, a large arm lifting oil cylinder is connected between the large arm base and the large arm telescopic mechanism, the other end of the large arm telescopic mechanism is hinged with a drilling rig connecting seat, a drilling rig leveling oil cylinder is connected between the drilling rig connecting seat and the large arm telescopic mechanism, the drilling rig is installed on the drilling rig connecting seat through the rotary oil cylinder, the swing oil cylinder is connected between the drilling rig and the drilling rig connecting seat.
Furthermore, the hydraulic top receiving device comprises a top receiving rod, a top receiving cylinder body and a top receiving cover, wherein the bottom of the top receiving cylinder body is sealed by the top receiving cover, an oil port is formed in one side of the top receiving cylinder body, the top receiving rod is arranged in the top receiving cylinder body, the upper end of the top receiving rod extends out of the top receiving cylinder body, the lower end of the top receiving rod is arranged in the top receiving cylinder body, and a spring is arranged between the lower end of the top receiving rod and the top receiving cylinder body.
The hydraulic control system of the full-hydraulic automatic jacking device of the intelligent anchor rod drilling rig comprises a hydraulic pump, a motor, two-way valves, a functional valve bank, an oil supplementing valve bank, a safety valve bank, a one-way throttle valve, a pressure sensor and a hydraulic jacking device, wherein the hydraulic pump is driven by the motor, the two-way valves are connected with the hydraulic pump, a first connection of the two-way valves is connected with an A1 port and a B1 port of the functional valve bank, a second connection of the two-way valves is connected with an A2 port and a B2 port of the functional valve bank, an A3 port and an A4 port of the functional valve bank are connected with a large arm lifting oil cylinder, a Z port in the two-way valves is connected with the one-way throttle valve, one end of an outlet of the one-way throttle valve is connected with the pressure sensor.
An automatic top-contacting method of a hydraulic control system of a full-hydraulic automatic top-contacting device of an intelligent anchor rod drill frame is characterized in that a hydraulic pump is driven by a motor, when a large arm moves, the hydraulic pump provides pressure oil to the hydraulic top-contacting device through a Z port of two connecting valves and a one-way throttle valve, and the pressure oil pushes a top-contacting rod of the hydraulic top-contacting device to completely extend out; when the drill stand is in top connection, the hydraulic top connection device is in contact with the top plate, when the large arm lifting oil cylinder continues to move upwards again, the hydraulic top connection device is subjected to the pressure of the top plate, a sealed cavity is formed between the hydraulic top connection device and the one-way throttle valve, when the large arm continues to move upwards, pressure oil in the sealed cavity is subjected to the pressure action, the pressure rises instantly, the pressure sensor detects the pressure change value and transmits the pressure change value to the system controller, and the system is judged to be in top connection automatically.
Compared with the prior art, the method solves the problem of automatic roof contact, and does not need to judge the roof contact manually; and also provides a precondition for automatic anchor drilling.
Drawings
FIG. 1 is a schematic structural view of an intelligent anchor rod drilling rig full-automatic jacking device;
FIG. 2 is a schematic structural view of a hydraulic jacking device;
FIG. 3 is a schematic diagram of a hydraulic system;
in the figure, 1-a large arm telescopic mechanism, 2-a large arm lifting oil cylinder, 3-a drill frame leveling oil cylinder, 4-a large arm base, 5-a drill frame connecting seat, 6-a drill frame, 7-a rotating oil cylinder, 8-a swinging oil cylinder connecting lug, 9-a large arm rotating pin shaft, 10-a swinging oil cylinder, 11-a hydraulic jacking device, 11.1-a jacking rod, 11.2-a spring, 11.3-a jacking cylinder body, 11.4-an oil port, 11.5-a top cover, 11.6-a bolt, 12.1-a hydraulic pump, 12.2-a motor, 12.3-a two-way valve, 12.4-a functional valve bank, 12.6-a follow-up oil cylinder, 12.7-an oil compensating valve bank, 12.8-a leveling oil cylinder, 12.9-a safety valve bank, 12.10-a one-way throttle valve and 12.11-a pressure sensor.
Detailed Description
As shown in fig. 1, the full hydraulic automatic top contacting device of the intelligent anchor rod drilling rig mainly comprises a large arm telescopic mechanism 1, a large arm lifting oil cylinder 2, a drilling rig leveling oil cylinder 3, a large arm base 4, a drilling rig connecting seat 5, a drilling rig 6, a rotary oil cylinder 7, a swing oil cylinder connecting lug 8, a large arm rotary pin shaft 9, a swing oil cylinder 10 and a hydraulic top contacting device 11. The anchor robot realizes the fore-and-aft expansion of the drilling rig through the large arm telescopic mechanism 1, realizes the up-and-down lifting of the drilling rig through the large arm lifting oil cylinder 2, the swing oil cylinder is connected with the connecting seat 8 and swings left and right around the large arm rotating pin shaft 9, the drilling rig rotates through the rotating oil cylinder 7, the left-and-right swinging of the drilling rig is realized through the swing oil cylinder 10, and the up-and-down leveling of the drilling rig is realized through the drilling rig leveling oil cylinder 3. When the big arm lifting oil cylinder 2 moves upwards, the drill frame 6 moves upwards along with the big arm, meanwhile, the drill frame leveling oil cylinder 3 drives the drill frame 6 to move downwards to enable the drill frame 6 to keep a horizontal state, when the drill frame reaches a certain height, the hydraulic jacking device 11 is in contact with a top plate, and when the big arm lifting oil cylinder 2 continues to move upwards again, the hydraulic jacking device 11 starts to act.
The hydraulic jacking device 11 has the following working principle: as shown in fig. 2, the hydraulic roof connecting device 11 mainly comprises a roof connecting rod 1, a spring 2, a roof connecting cylinder 3, an oil port 4, a roof connecting cover 5 and a bolt 6. When the large arm oil cylinder acts, hydraulic oil enters the jacking cylinder body 3 through the oil port 4 to push the jacking rod 1 to extend out; when the hydraulic jacking device 11 is in contact with the top plate, the hydraulic jacking device 11 starts to act, when the large-arm lifting oil cylinder moves upwards again, the jacking rod 1 contracts back under the pressure of the top plate, the one-way throttle valve connected with the jacking cylinder body 3 and the oil port 4 forms a closed cavity, and hydraulic oil in the cavity receives the pressure of the jacking rod to form high pressure. And the pressure sensor of the hydraulic system receives the high-pressure signal and feeds the high-pressure signal back to the system controller, the drill rig is judged to be in top contact, an instruction is sent out, the large arm lifting oil cylinder is stopped to move upwards, and the next step of movement in the full-automatic process is carried out.
The working principle of the hydraulic system is as follows: as shown in figure 3, in the hydraulic control system of the full-hydraulic automatic jacking device of the intelligent anchor rod drilling rig, a hydraulic pump 12.1 is driven by a motor 12.2 and is connected with a one-way throttle valve 12.10 through a two-way valve 12.3Z port, the one-way throttle valve 12.10 is connected with a hydraulic jacking device 11, and a pressure sensor 12.11 is connected between the one-way throttle valve 12.10 and the hydraulic jacking device 11. When the big arm moves, the hydraulic pump provides pressure oil to the hydraulic jacking device 11 through the two-way valve 12.3Z port and the one-way throttle valve 12.10, the pressure oil pushes the hydraulic jacking device 11 to extend out completely, when the drill rig jacks, the hydraulic jacking device 11 is in contact with the top plate, when the big arm lifting oil cylinder 2 continues to move upwards again, the hydraulic jacking device 11 is subjected to the pressure of the top plate, a closed cavity is formed between the hydraulic jacking device 11 and the one-way throttle valve 12.10, when the big arm continues to move upwards, the pressure oil in the closed cavity is subjected to the pressure action, the pressure rises instantly, the pressure sensor 12.11 detects the pressure change value and transmits the pressure change value to the system controller, and the system is judged to jack automatically.
An automatic top-contacting method of a hydraulic control system of a full-hydraulic automatic top-contacting device of an intelligent anchor rod drill frame is characterized in that a hydraulic pump 12.1 is driven by a motor 12.2, when a big arm moves, the hydraulic pump 12.1 provides pressure oil to a hydraulic top-contacting device 11 through a two-way valve 12.3Z port and a one-way throttle valve 12.10, and the pressure oil pushes a top-contacting rod of the hydraulic top-contacting device 11 to be completely extended; when the drill rig is jacked, the hydraulic jacking device 11 is in contact with the top plate, when the large arm lifting oil cylinder 2 continues to move upwards again, the hydraulic jacking device 11 is subjected to the pressure of the top plate, a sealed cavity is formed between the hydraulic jacking device 1 and the one-way throttle valve 12.10, when the large arm continues to move upwards, pressure oil in the sealed cavity is subjected to the pressure action, the pressure rises instantly, the pressure sensor 12.11 transmits a detected pressure change value to the system controller, and the system is judged to be automatically jacked.
Claims (4)
1. The utility model provides a full-hydraulic automatic device that connects of intelligence stock drill frame which characterized in that: comprises a large arm telescopic mechanism (1), a large arm lifting oil cylinder (2), a drill stand leveling oil cylinder (3), a large arm base (4), a drill stand connecting seat (5), a drill stand (6), a rotary oil cylinder (7), a swing oil cylinder connecting lug (8), a large arm rotary pin shaft (9), a swing oil cylinder (10) and a hydraulic jacking device (11), wherein one end of the large arm telescopic mechanism (1) is arranged on the large arm base (4), the large arm base (4) is provided with the large arm rotary pin shaft (9), the two sides of the large arm base (4) are provided with the swing oil cylinder connecting lug (8) connected with the swing oil cylinder, the large arm lifting oil cylinder (2) is connected between the large arm base (4) and the large arm telescopic mechanism (1), the other end of the large arm telescopic mechanism (1) is hinged with the drill stand connecting seat (5), the drill stand leveling oil cylinder (3) is connected between the drill stand connecting seat (5) and the large arm telescopic, the drill stand connecting seat (5) is provided with a drill stand (6) through a rotary oil cylinder (7), a swing oil cylinder (10) is connected between the drill stand (6) and the drill stand connecting seat (5), and the top of the drill stand (6) is provided with a hydraulic jacking device (11).
2. The full-hydraulic automatic jacking device of an intelligent anchor rod drilling frame as claimed in claim 1, wherein: the hydraulic top connection device (11) comprises a top connection rod (11.1), a top connection cylinder body (11.3) and a top connection cover (11.5), wherein the bottom of the top connection cylinder body (11.3) is sealed by the top connection cover (11.5), an oil port (11.4) is formed in one side of the top connection cylinder body (11.3), the top connection rod (11.1) is arranged in the top connection cylinder body (11.3), the upper end of the top connection rod (11.1) extends out of the top connection cylinder body (11.3), the lower end of the top connection rod (11.1) is arranged in the top connection cylinder body (11.3), and a spring (11.2) is arranged between the lower end of the top connection rod (11.1) and the top connection cylinder body (11.3).
3. The hydraulic control system of the intelligent anchor rod drilling frame full-hydraulic automatic jacking device of claim 2, characterized in that: comprises a hydraulic pump (12.1), a motor (12.2), a two-way valve (12.3), a functional valve group (12.4), an oil supplementing valve group (12.7), a safety valve group (12.9), a one-way throttle valve (12.10), a pressure sensor (12.11) and a hydraulic top-contacting device (11), the hydraulic pump (12.1) is driven by a motor (12.2), the two-way valve (12.3) is connected with the hydraulic pump (12.1), the first connection of the two-way valve (12.3) is connected with the port A1 and the port B1 of the functional valve group (12.4), the second connection of the two-way valve (12.3) is connected with the port A2 and the port B2 of the functional valve group (12.4), the port A3 and the port A4 of the functional valve group (12.4) are connected with the large arm lifting oil cylinder (2), the Z port in the two-way valve (12.3) is connected with a one-way throttle valve (12.10), one end of the outlet of the one-way throttle valve (12.10) is connected with a pressure sensor (12.11), the other end of the outlet of the one-way throttle valve is connected with a hydraulic jacking device (11), and the pressure sensor (12.11) is in.
4. An automatic roof-contacting method of the hydraulic control system of the full-hydraulic automatic roof-contacting device of the intelligent anchor rod drilling rig according to claim 3, characterized in that: the hydraulic pump (12.1) is driven by the motor (12.2), when the boom moves, the hydraulic pump (12.1) provides pressure oil to the hydraulic jacking device (11) through a Z port of the two-way valve (12.3) and the one-way throttle valve (12.10), and the pressure oil pushes a jacking rod of the hydraulic jacking device (11) to be completely extended; when the drill rig is jacked, the hydraulic jacking device (11) is in contact with the top plate, when the large arm lifting oil cylinder (2) continues to move upwards again, the hydraulic jacking device (11) is subjected to the pressure of the top plate, a sealed cavity is formed between the hydraulic jacking device (1) and the one-way throttle valve (12.10), when the large arm continues to move upwards, pressure oil in the sealed cavity is subjected to the pressure action, the pressure rises instantly, the pressure sensor (12.11) detects the pressure change value and transmits the pressure change value to the system controller, and the system is judged to be automatically jacked.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202010813377.4A CN112012665B (en) | 2020-08-13 | 2020-08-13 | Full-hydraulic automatic roof connecting device and method for intelligent anchor rod drill frame |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202010813377.4A CN112012665B (en) | 2020-08-13 | 2020-08-13 | Full-hydraulic automatic roof connecting device and method for intelligent anchor rod drill frame |
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| Publication Number | Publication Date |
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| CN112012665A true CN112012665A (en) | 2020-12-01 |
| CN112012665B CN112012665B (en) | 2023-03-14 |
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| CN202010813377.4A Active CN112012665B (en) | 2020-08-13 | 2020-08-13 | Full-hydraulic automatic roof connecting device and method for intelligent anchor rod drill frame |
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Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN113756733A (en) * | 2021-08-27 | 2021-12-07 | 中国煤炭科工集团太原研究院有限公司 | Clamping rod top connecting device for drill stand and drill stand |
| CN113790063A (en) * | 2021-08-27 | 2021-12-14 | 中国煤炭科工集团太原研究院有限公司 | Positioning test bed |
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| CN203702211U (en) * | 2014-01-06 | 2014-07-09 | 三一重型装备有限公司 | Hydraulic shield support and automatic top beam adjusting device for hydraulic shield support |
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| CN208168932U (en) * | 2018-05-14 | 2018-11-30 | 浩珂科技有限公司 | It is a kind of to connect top Concrete Filled mould bag automatically |
| CN110566526A (en) * | 2019-08-27 | 2019-12-13 | 中国煤炭科工集团太原研究院有限公司 | Full-hydraulic automatic leveling control device and control system for intelligent anchor rod drilling frame |
| CN111075444A (en) * | 2019-12-03 | 2020-04-28 | 中国煤炭科工集团太原研究院有限公司 | High-adaptability tunneling and anchoring all-in-one machine with dual-mode anchor drilling system |
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|---|---|---|---|---|
| CA1183007A (en) * | 1981-09-18 | 1985-02-26 | George A. Hibbard | Mine roof driller - bolter apparatus |
| US6105684A (en) * | 1996-08-08 | 2000-08-22 | Cram Australia Pty Ltd | Roof bolter or a roof bolt installation apparatus |
| US20060078391A1 (en) * | 2004-09-24 | 2006-04-13 | Jennmar Corporation | Point anchor coated mine roof bolt |
| AU2007200134A1 (en) * | 2005-09-22 | 2008-01-10 | Fci Holdings Delaware, Inc. | Point anchor coated mine roof bolt |
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Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN113756733A (en) * | 2021-08-27 | 2021-12-07 | 中国煤炭科工集团太原研究院有限公司 | Clamping rod top connecting device for drill stand and drill stand |
| CN113790063A (en) * | 2021-08-27 | 2021-12-14 | 中国煤炭科工集团太原研究院有限公司 | Positioning test bed |
| CN113790063B (en) * | 2021-08-27 | 2023-08-04 | 中国煤炭科工集团太原研究院有限公司 | Positioning test stand |
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| Publication number | Publication date |
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| CN112012665B (en) | 2023-03-14 |
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