CN110821541A - Coal mine underground graded early warning protective anchor rod device and protective method thereof - Google Patents
Coal mine underground graded early warning protective anchor rod device and protective method thereof Download PDFInfo
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- CN110821541A CN110821541A CN201911322483.6A CN201911322483A CN110821541A CN 110821541 A CN110821541 A CN 110821541A CN 201911322483 A CN201911322483 A CN 201911322483A CN 110821541 A CN110821541 A CN 110821541A
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- 239000003245 coal Substances 0.000 title claims abstract description 68
- 238000000034 method Methods 0.000 title claims abstract description 21
- 230000001681 protective effect Effects 0.000 title claims abstract description 21
- 238000013016 damping Methods 0.000 claims abstract description 25
- 230000006835 compression Effects 0.000 claims abstract description 14
- 238000007906 compression Methods 0.000 claims abstract description 14
- 238000005381 potential energy Methods 0.000 claims abstract description 6
- 238000001514 detection method Methods 0.000 claims abstract description 4
- 230000008569 process Effects 0.000 claims description 7
- 238000005553 drilling Methods 0.000 claims description 5
- 230000009977 dual effect Effects 0.000 claims description 3
- 238000009434 installation Methods 0.000 claims description 3
- 239000000843 powder Substances 0.000 claims description 3
- 239000011435 rock Substances 0.000 claims description 3
- 238000005516 engineering process Methods 0.000 description 2
- 238000009412 basement excavation Methods 0.000 description 1
- 238000007664 blowing Methods 0.000 description 1
- 230000003139 buffering effect Effects 0.000 description 1
- 230000008859 change Effects 0.000 description 1
- 238000010276 construction Methods 0.000 description 1
- 230000000694 effects Effects 0.000 description 1
- 230000003628 erosive effect Effects 0.000 description 1
- 239000003673 groundwater Substances 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
- 230000002028 premature Effects 0.000 description 1
- 230000002265 prevention Effects 0.000 description 1
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- E—FIXED CONSTRUCTIONS
- E21—EARTH OR ROCK DRILLING; MINING
- E21D—SHAFTS; TUNNELS; GALLERIES; LARGE UNDERGROUND CHAMBERS
- E21D21/00—Anchoring-bolts for roof, floor in galleries or longwall working, or shaft-lining protection
- E21D21/008—Anchoring or tensioning means
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- E—FIXED CONSTRUCTIONS
- E21—EARTH OR ROCK DRILLING; MINING
- E21D—SHAFTS; TUNNELS; GALLERIES; LARGE UNDERGROUND CHAMBERS
- E21D21/00—Anchoring-bolts for roof, floor in galleries or longwall working, or shaft-lining protection
- E21D21/0093—Accessories
-
- E—FIXED CONSTRUCTIONS
- E21—EARTH OR ROCK DRILLING; MINING
- E21D—SHAFTS; TUNNELS; GALLERIES; LARGE UNDERGROUND CHAMBERS
- E21D21/00—Anchoring-bolts for roof, floor in galleries or longwall working, or shaft-lining protection
- E21D21/02—Anchoring-bolts for roof, floor in galleries or longwall working, or shaft-lining protection having means for indicating tension
-
- 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
- E21F17/18—Special adaptations of signalling or alarm devices
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- Engineering & Computer Science (AREA)
- Mining & Mineral Resources (AREA)
- Life Sciences & Earth Sciences (AREA)
- General Life Sciences & Earth Sciences (AREA)
- Geochemistry & Mineralogy (AREA)
- Geology (AREA)
- Structural Engineering (AREA)
- Emergency Alarm Devices (AREA)
Abstract
The invention discloses a coal mine underground graded early warning and protective anchor rod device which comprises an anchor rod, wherein the anchor rod is inserted into a coal seam roof, a stress sensor, a tray and a compression nut are sequentially sleeved on an extension part of the anchor rod from top to bottom, and the compression nut is in threaded connection with the extension part and upwards presses the tray and the stress sensor on the coal seam roof; a buzzer and an alarm lamp are arranged on the tray; the bottom threaded connection of extension has the protective rubber cover, and the protective rubber cover evenly is connected with a plurality of damping spring along circumference, and each damping spring all is connected with the coal seam roof. The invention also discloses a corresponding protection method, which comprises a detection and primary early warning step, a primary manual processing and secondary early warning step, a secondary manual processing step and an anchor rod fracture protection step. The invention can carry out graded alarm, and when the anchor rod is broken, the kinetic energy of the anchor rod which is broken off downwards due to the breakage is converted into the elastic potential energy of the damping spring, thereby avoiding the damage of the anchor rod to personnel and articles in the coal mine roadway caused by the unconfined breakage.
Description
Technical Field
The invention relates to a supporting technology, in particular to a safety technology of an anchor rod.
Background
The anchor rod is widely applied in engineering, such as coal mine roadway support systems, side slope support systems and other occasions. The anchor rod is an important part of a support system in many projects and is a starting point of the support force of the support system, and currently, most coal mines adopt the anchor rod support system to support a coal mine roadway. Because the anchor bolt support has very strong shelter nature, the excavation of coal-winning machine and entry driving machine, abominable operational environment, the erosion of groundwater etc. to the disturbance of anchor bolt support system, the power increase that the anchor bolt receives probably causes the anchor bolt fracture to impel support system inefficacy, not only probably leads to the colliery tunnel roof fall accident, and the anchor bolt fracture can lead to the anchor bolt to fall from its mounted position promptly coal seam roof department and injure the people moreover.
Disclosure of Invention
The invention aims to provide a coal mine underground graded early warning and protective anchor rod device, which carries out light alarm and sound alarm in advance through the change condition of the stress borne by an anchor rod, converts the kinetic energy of the anchor rod when the anchor rod collapses and flies into elastic potential energy when the anchor rod is broken, and avoids the damage to personnel and articles caused by unrestrained collapse and flies.
In order to achieve the purpose, the underground coal mine graded early warning and protection type anchor rod device comprises an anchor rod, wherein the anchor rod is inserted into a coal seam roof, one end of the anchor rod extends out of the coal seam roof to form an extending part,
the external threads are arranged on the extension part, the extension part is sequentially sleeved with the stress sensor, the tray and the compression nut from top to bottom, and the compression nut is in threaded connection with the extension part and presses the tray and the stress sensor on the coal seam roof upwards; the tray is provided with a buzzer and an alarm lamp, and the stress sensor, the buzzer and the alarm lamp are all connected with the electric control device through circuits;
the bottom threaded connection of extension has the protective rubber cover, and the protective rubber cover evenly is connected with a plurality of damping spring along circumference, and each damping spring is all upwards to be connected with the coal seam roof.
And each damping spring is connected to the coal seam roof through an anchor net attached to the coal seam roof.
The invention also aims to provide a protection method using the underground coal mine grading early warning and protection type anchor rod device, which comprises the following steps:
after the underground coal mine grading early warning and protection type anchor rod device is installed at the top plate of a coal seam, the underground coal mine grading early warning and protection type anchor rod device starts to work; the yield strength of the anchor rod is X MPa;
the first step is a detection and primary early warning step: the electric control device continuously detects the stress on the anchor rod through the stress sensor during working; when the stress borne by the anchor rod is increased to 80% of the yield strength of the anchor rod in the working process, the electric control device turns on the alarm lamp, and the alarm lamp emits flashing red light to remind workers of carrying out manual treatment on the anchor rod;
the second step is a first-stage manual processing and second-stage early warning step: if the worker carries out manual treatment, the anchor rod returns to the normal state, the electric control device closes the alarm lamp and returns to execute the first step; if the worker does not find the alarm of the alarm lamp, the electric control device controls the alarm lamp to continuously emit flickering red light, and meanwhile, the stress on the anchor rod is continuously detected through the stress sensor; if the stress on the anchor rod falls back to be lower than 80% of the yield strength of the anchor rod, the electronic control device closes the alarm lamp and returns to execute the first step again;
when the stress borne by the anchor rod is increased to 90% of the yield strength of the anchor rod in the working process, the electric control device turns on the buzzer, the buzzer sends out buzzing sound or an alarm bell, and meanwhile, the alarm lamp is kept continuously sending out flashing red light to remind workers of carrying out manual treatment on the anchor rod;
the third step is a secondary manual processing step: if the worker carries out manual treatment, the anchor rod returns to a normal state, the electric control device closes the alarm lamp and the buzzer and returns to execute the first step; if the worker does not find the alarm of the alarm lamp or the alarm of the buzzer, the electric control device controls the alarm lamp to continuously emit flickering red light, and meanwhile, the stress sensor continuously detects the stress on the anchor rod;
if the stress on the anchor rod falls back to be lower than 90% of the yield strength of the anchor rod, the electric control device closes the buzzer and returns to execute the second step again;
the fourth step is a bolt fracture protection step: if the stress on the anchor rod reaches or exceeds the yield strength of the anchor rod, the anchor rod is broken, and the energy generated during the breakage collapses and flies the anchor rod downwards; when the extension part is collapsed downwards, the extension part is pulled by each damping spring, so that the energy generated during fracture is converted into the elastic potential energy of the damping springs; when the extension of stock carries each by tensile damping spring and strikes downwards on personnel or article under extreme condition, through damping spring and protective rubber cover's dual function, weakens the impact force of the extension of stock by a wide margin to personnel and article in the effective protection coal mine tunnel.
The method for installing the underground coal mine graded early warning and protective anchor rod device at the coal seam roof comprises the following steps:
the first is a mark; the method comprises the following steps that a designer determines the position of an anchor rod drilling hole at a coal seam roof according to the arrangement requirement of an anchor rod and the design requirement of roadway support, and marks the position;
secondly, drilling; the distance error of the anchor rod holes does not exceed 100mm, and the axial deviation does not exceed 5 degrees;
thirdly, mounting an anchor rod; before installation, coal rock powder in the anchor rod hole is flushed and cleaned, the upper end of the anchor rod is pushed to the bottom of the hole, and the length of the extension part of the lower end of the anchor rod extending out of the coal seam top plate is less than or equal to 50 mm;
the fourth step is connection; installing a buzzer and an alarm lamp on a tray, sleeving a stress sensor, the tray and a compression nut on the extending part of the anchor rod, rotating the compression nut by using a wrench, and pushing the tray and the stress sensor upwards on a coal seam roof to generate prestress; and the stress sensor, the buzzer and the alarm lamp are connected with the electric control device.
The lines of the stress sensor are connected with the electric control device through the signal amplifier.
The invention has the following advantages:
the stress sensor is used for continuously detecting the stress applied to the anchor rod, when the stress is increased, graded alarm is carried out according to the difference of the increasing degree, the single alarm lamp gives out primary light alarm, and longer preparation time is provided for the anchor rod to break; the alarm lamp and the buzzer are advanced alarms when light and sound alarms happen simultaneously, the danger of anchor rod breakage is urgent, and workers must deal with the alarm at once.
Because the invention can carry out graded alarm, the invention has the following technical effects:
the first is to be able to provide a relatively long warning time and avoid inefficient work by workers.
And the stress on the anchor rod reaches 80% of the yield strength when early warning is started, and premature intervention of workers cannot be caused. When the anchor rod is subjected to low stress, the anchor rod is in a stable state, and can stably work for a long time even if not processed, and even the stress is reduced. According to the invention, early warning is started when the stress on the anchor rod reaches 80% of the yield strength of the anchor rod, so that relatively long early warning time is provided, and the condition that workers perform ineffective manual operation on the anchor rod due to early warning is avoided.
Secondly, the worker can easily distinguish whether the alarm is a primary alarm or a high-level alarm by observing the alarm states of the alarm lamp and the buzzer, so that the work is reasonably arranged. When in the primary alarm phase, the worker does not have to immediately interrupt the task at hand, thereby avoiding the loss of the worker immediately interrupting the task to handle the bolt. When in the advanced alarm stage, the worker must immediately interrupt the work at hand to process the anchor rod, avoid the damage to the support system caused by the fracture of the anchor rod, and avoid the higher cost caused by recovering the support system (reworking the anchor rod) after the fracture of the anchor rod. The signal amplifier amplifies the weak signal of the stress sensor and provides the amplified weak signal to the electric control device, so that the accuracy of the electric control device in identifying the signal of the stress sensor can be enhanced.
The invention can not only carry out graded alarm before the anchor rod is broken, but also convert the kinetic energy of the anchor rod collapsing downwards due to breakage into the elastic potential energy of the damping spring when the anchor rod is broken in an extreme condition, thereby avoiding the damage of the anchor rod to personnel and articles in a coal mine roadway caused by unrestrained collapse. The protective rubber sleeve further plays a role in impact buffering, and safety of personnel and articles is protected to the maximum extent.
Drawings
FIG. 1 is a schematic structural view of the present invention installed at the roof of a coal seam;
FIG. 2 is an enlarged view at A in FIG. 1;
FIG. 3 is a schematic structural view of a protective rubber sleeve;
FIG. 4 is a flow chart of a guard method of the present invention.
Detailed Description
As shown in fig. 1 to 3, the coal mine underground graded early warning and protection type anchor rod device of the invention comprises an anchor rod 1, the anchor rod 1 is inserted into a coal seam roof 2, one end of the anchor rod 1 extends out of the coal seam roof 2 and forms an extension part 3,
the external threads are arranged on the extension part 3, the extension part 3 is sequentially sleeved with the stress sensor 4, the tray 5 and the compression nut 6 from top to bottom, and the compression nut 6 is in threaded connection with the extension part 3 and upwards presses the tray 5 and the stress sensor 4 on the coal seam roof 2; the tray 5 is provided with a buzzer 7 and an alarm lamp 8, and the stress sensor 4, the buzzer 7 and the alarm lamp 8 are all connected with an electric control device 10 through a circuit 9;
the bottom threaded connection of extension 3 has protective rubber cover 11, and protective rubber cover 11 evenly is connected with a plurality of damping spring 12 along circumference, and each damping spring 12 all upwards is connected with coal seam roof 2. The electronic control device 10 preferably employs a PLC.
Each damping spring 12 is connected to the coal seam roof 2 through an anchor net attached to the coal seam roof 2. The anchor net is of conventional construction and is not shown.
As shown in fig. 1 to 4, the invention also discloses a protection method using the underground coal mine graded early warning and protection type anchor rod device, which is carried out according to the following steps:
after the underground coal mine grading early warning and protection type anchor rod device is installed at the position of the coal seam roof 2, the underground coal mine grading early warning and protection type anchor rod device starts to work; the yield strength of the anchor rod 1 is X megapascals (MPa); in this example, X is 345 MPa.
The first step is a detection and primary early warning step: during work, the electric control device 10 continuously detects the stress on the anchor rod 1 through the stress sensor 4; when the tensile stress borne by the anchor rod 1 in the working process is increased to 80% of the yield strength of the anchor rod 1 (in the embodiment, 80% X is 276 MPa), the electric control device 10 turns on the alarm lamp 8, and the alarm lamp 8 emits flashing red light to remind a worker of manually processing the anchor rod 1; the red light is easier for workers to find.
The second step is a first-stage manual processing and second-stage early warning step: if the worker carries out manual treatment, the anchor rod 1 is recovered to a normal state, the electric control device 10 turns off the alarm lamp 8, and the first step is executed; if the worker does not find the alarm of the alarm lamp 8, the electric control device 10 controls the alarm lamp 8 to continuously emit the flashing red light, and meanwhile, the stress sensor 4 continuously detects the stress on the anchor rod 1; if the stress applied to the anchor rod 1 falls back to be lower than 80% of the yield strength of the anchor rod 1 (the phenomenon of the stress falling back is rare), the electronic control device 10 closes the alarm lamp 8 and returns to execute the first step again;
when the tensile stress borne by the anchor rod 1 is increased to 90% of the yield strength of the anchor rod 1 in the working process, the electric control device 10 turns on the buzzer 7, the buzzer 7 sends out buzzing sound or alarm bell, and meanwhile, the alarm lamp 8 keeps continuously sending out flashing red light to remind workers of manually processing the anchor rod 1;
the third step is a secondary manual processing step: if the worker carries out manual treatment, the anchor rod 1 is recovered to a normal state, the electric control device 10 closes the alarm lamp and the buzzer, and the first step is executed; if the worker does not find the alarm of the alarm lamp 8 or the alarm of the buzzer 7, the electric control device 10 controls the alarm lamp 8 to continuously emit the flashing red light, and meanwhile, the stress sensor 4 continues to detect the stress on the anchor rod 1;
if the stress applied to the anchor rod 1 falls back to be lower than 90% of the yield strength of the anchor rod 1 (the phenomenon of the stress falling back is rare), the electric control device 10 closes the buzzer 7 and returns to execute the second step again;
the fourth step is a bolt breakage prevention step (as long as the bolt 1 is manually processed in any of the second and third steps, the fourth step does not occur): if the stress on the anchor rod 1 reaches or exceeds the yield strength of the anchor rod 1 (in the embodiment, the stress reaches or exceeds 345 MPa), the anchor rod 1 is broken, and the energy generated during the breaking breaks the anchor rod 1 downwards; when the protruding portion 3 is collapsed downward, it is pulled by each damping spring 12, so that the energy generated during fracture is converted into the elastic potential energy of the damping spring 12; when the extension part 3 of the anchor rod 1 carries the stretched damping springs 12 to impact on personnel or articles downwards under extreme conditions, the impact force of the extension part 3 of the anchor rod 1 is greatly weakened through the dual functions of the damping springs 12 and the protective rubber sleeve 11, so that the personnel and the articles in a coal mine roadway are effectively protected. The casualties and the article loss are avoided to the maximum extent.
The method for installing the underground coal mine graded early warning and protection type anchor rod device at the coal seam roof 2 comprises the following steps:
the first is a mark; a designer determines the position of a drilled hole of the anchor rod 1 at the coal seam roof 2 according to the arrangement requirement of the anchor rod 1 and the design requirement of roadway support, and marks the position;
secondly, drilling; the hole spacing error of the anchor rod 1 is not more than 100mm (millimeter), and the axial deviation is not more than 5 degrees;
thirdly, mounting the anchor rod 1; before installation, coal rock powder in the hole of the anchor rod 1 is cleaned by blowing, the upper end of the anchor rod 1 is pushed to the bottom of the hole, and the length of the extension part 3 at the lower end of the anchor rod 1 extending out of the coal seam roof 2 is less than or equal to 50 mm;
the fourth step is connection; installing a buzzer 7 and an alarm lamp 8 on a tray 5, sleeving a stress sensor 4, the tray 5 and a compression nut 6 on an extension part 3 of an anchor rod 1, rotating the compression nut 6 by using a wrench, and upwards jacking the tray 5 and the stress sensor 4 on a coal seam roof 2 so as to generate prestress; the stress sensor 4, the buzzer 7 and the alarm lamp 8 are connected in a line 9 to an electronic control device 10.
The lines 9 of the stress sensor 4 are connected to an electronic control device 10 via signal amplifiers. The signal amplifier is a conventional device and is not shown. The signal amplifier amplifies the weak signal of the stress sensor 4 and provides the amplified weak signal to the electric control device 10, so that the accuracy of the electric control device 10 in identifying the signal of the stress sensor 4 can be enhanced.
Although the present invention has been described in detail with reference to the above embodiments, it should be understood by those skilled in the art that: modifications and equivalents may be made thereto without departing from the spirit and scope of the invention and it is intended to cover in the claims the invention as defined in the appended claims.
Claims (5)
1. Colliery is hierarchical early warning and protection formula anchor rod device in pit, including the stock, the stock inserts the coal seam roof, and stock one end stretches out the coal seam roof and forms extension, its characterized in that:
the external threads are arranged on the extension part, the extension part is sequentially sleeved with the stress sensor, the tray and the compression nut from top to bottom, and the compression nut is in threaded connection with the extension part and presses the tray and the stress sensor on the coal seam roof upwards; the tray is provided with a buzzer and an alarm lamp, and the stress sensor, the buzzer and the alarm lamp are all connected with the electric control device through circuits;
the bottom threaded connection of extension has the protective rubber cover, and the protective rubber cover evenly is connected with a plurality of damping spring along circumference, and each damping spring is all upwards to be connected with the coal seam roof.
2. The coal mine underground graded early warning and protection type anchor rod device according to claim 1, which is characterized in that: and each damping spring is connected to the coal seam roof through an anchor net attached to the coal seam roof.
3. The protection method using the underground coal mine graded early warning and protection type anchor rod device in claim 1 or 2 is characterized by comprising the following steps of:
after the underground coal mine grading early warning and protection type anchor rod device is installed at the top plate of a coal seam, the underground coal mine grading early warning and protection type anchor rod device starts to work; the yield strength of the anchor rod is X MPa;
the first step is a detection and primary early warning step: the electric control device continuously detects the stress on the anchor rod through the stress sensor during working; when the stress borne by the anchor rod is increased to 80% of the yield strength of the anchor rod in the working process, the electric control device turns on the alarm lamp, and the alarm lamp emits flashing red light to remind workers of carrying out manual treatment on the anchor rod;
the second step is a first-stage manual processing and second-stage early warning step: if the worker carries out manual treatment, the anchor rod returns to the normal state, the electric control device closes the alarm lamp and returns to execute the first step; if the worker does not find the alarm of the alarm lamp, the electric control device controls the alarm lamp to continuously emit flickering red light, and meanwhile, the stress on the anchor rod is continuously detected through the stress sensor; if the stress on the anchor rod falls back to be lower than 80% of the yield strength of the anchor rod, the electronic control device closes the alarm lamp and returns to execute the first step again;
when the stress borne by the anchor rod is increased to 90% of the yield strength of the anchor rod in the working process, the electric control device turns on the buzzer, the buzzer sends out buzzing sound or an alarm bell, and meanwhile, the alarm lamp is kept continuously sending out flashing red light to remind workers of carrying out manual treatment on the anchor rod;
the third step is a secondary manual processing step: if the worker carries out manual treatment, the anchor rod returns to a normal state, the electric control device closes the alarm lamp and the buzzer and returns to execute the first step; if the worker does not find the alarm of the alarm lamp or the alarm of the buzzer, the electric control device controls the alarm lamp to continuously emit flickering red light, and meanwhile, the stress sensor continuously detects the stress on the anchor rod;
if the stress on the anchor rod falls back to be lower than 90% of the yield strength of the anchor rod, the electric control device closes the buzzer and returns to execute the second step again;
the fourth step is a bolt fracture protection step: if the stress on the anchor rod reaches or exceeds the yield strength of the anchor rod, the anchor rod is broken, and the energy generated during the breakage collapses and flies the anchor rod downwards; when the extension part is collapsed downwards, the extension part is pulled by each damping spring, so that the energy generated during fracture is converted into the elastic potential energy of the damping springs; when the extension of stock carries each by tensile damping spring and strikes downwards on personnel or article under extreme condition, through damping spring and protective rubber cover's dual function, weakens the impact force of the extension of stock by a wide margin to personnel and article in the effective protection coal mine tunnel.
4. A method of safeguarding according to claim 3, characterized in that: the method for installing the underground coal mine graded early warning and protective anchor rod device at the coal seam roof comprises the following steps:
the first is a mark; the method comprises the following steps that a designer determines the position of an anchor rod drilling hole at a coal seam roof according to the arrangement requirement of an anchor rod and the design requirement of roadway support, and marks the position;
secondly, drilling; the distance error of the anchor rod holes does not exceed 100mm, and the axial deviation does not exceed 5 degrees;
thirdly, mounting an anchor rod; before installation, coal rock powder in the anchor rod hole is flushed and cleaned, the upper end of the anchor rod is pushed to the bottom of the hole, and the length of the extension part of the lower end of the anchor rod extending out of the coal seam top plate is less than or equal to 50 mm;
the fourth step is connection; installing a buzzer and an alarm lamp on a tray, sleeving a stress sensor, the tray and a compression nut on the extending part of the anchor rod, rotating the compression nut by using a wrench, and pushing the tray and the stress sensor upwards on a coal seam roof to generate prestress; and the stress sensor, the buzzer and the alarm lamp are connected with the electric control device.
5. A method of safeguarding according to claim 3, characterized in that: the lines of the stress sensor are connected with the electric control device through the signal amplifier.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201911322483.6A CN110821541A (en) | 2019-12-20 | 2019-12-20 | Coal mine underground graded early warning protective anchor rod device and protective method thereof |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201911322483.6A CN110821541A (en) | 2019-12-20 | 2019-12-20 | Coal mine underground graded early warning protective anchor rod device and protective method thereof |
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| CN110821541A true CN110821541A (en) | 2020-02-21 |
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| CN201911322483.6A Pending CN110821541A (en) | 2019-12-20 | 2019-12-20 | Coal mine underground graded early warning protective anchor rod device and protective method thereof |
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Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN111997674A (en) * | 2020-09-25 | 2020-11-27 | 何双龙 | Anti-collapse device for anchor rod |
| CN113125558A (en) * | 2021-03-23 | 2021-07-16 | 广西北投交通养护科技集团有限公司 | Intelligent anchor rod |
| CN113266007A (en) * | 2021-05-26 | 2021-08-17 | 中国矿业大学 | Prestressed anchor cable with fracture early warning function |
| CN113685212A (en) * | 2021-09-11 | 2021-11-23 | 江苏建筑职业技术学院 | Safety early warning system for coal mining |
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| CN103422890A (en) * | 2013-07-26 | 2013-12-04 | 山东大学 | Novel anchor rod pulling resistance alarm and using method thereof |
| CN106958459A (en) * | 2017-05-12 | 2017-07-18 | 中国矿业大学(北京) | A kind of back unstability grading forewarning system device and method for early warning |
| CN107304679A (en) * | 2016-04-22 | 2017-10-31 | 山东科技大学 | A kind of anti-anchor pole avalanche and anchor nut ejection integrated protection device |
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2019
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Patent Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103422890A (en) * | 2013-07-26 | 2013-12-04 | 山东大学 | Novel anchor rod pulling resistance alarm and using method thereof |
| CN107304679A (en) * | 2016-04-22 | 2017-10-31 | 山东科技大学 | A kind of anti-anchor pole avalanche and anchor nut ejection integrated protection device |
| CN106958459A (en) * | 2017-05-12 | 2017-07-18 | 中国矿业大学(北京) | A kind of back unstability grading forewarning system device and method for early warning |
Cited By (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN111997674A (en) * | 2020-09-25 | 2020-11-27 | 何双龙 | Anti-collapse device for anchor rod |
| CN113125558A (en) * | 2021-03-23 | 2021-07-16 | 广西北投交通养护科技集团有限公司 | Intelligent anchor rod |
| CN113125558B (en) * | 2021-03-23 | 2024-04-16 | 广西北投交通养护科技集团有限公司 | Intelligent stock |
| CN113266007A (en) * | 2021-05-26 | 2021-08-17 | 中国矿业大学 | Prestressed anchor cable with fracture early warning function |
| CN113685212A (en) * | 2021-09-11 | 2021-11-23 | 江苏建筑职业技术学院 | Safety early warning system for coal mining |
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