CN213331145U - Rock bolt support early warning device for narrow coal pillar in rock burst mine section - Google Patents
Rock bolt support early warning device for narrow coal pillar in rock burst mine section Download PDFInfo
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- CN213331145U CN213331145U CN202022148194.3U CN202022148194U CN213331145U CN 213331145 U CN213331145 U CN 213331145U CN 202022148194 U CN202022148194 U CN 202022148194U CN 213331145 U CN213331145 U CN 213331145U
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Abstract
The utility model discloses a rockbolt support early warning device for narrow coal pillars in rock burst mine sections, which comprises a first rockbolt support structure and a second rockbolt support structure, wherein the first rockbolt support structure and the second rockbolt support structure are connected through a coupling nut; the first anchor rod supporting structure and the second anchor rod supporting structure are identical in structure and are arranged in the same plane; first anchor bolt supporting construction and second anchor bolt supporting construction all include support stock and position fixing mechanism. The utility model discloses a two tunnels share a set of supporting system, very big saving the supporting cost, improved this anchor bolt supporting device's supporting effect; the anchor bolt supporting device can be disassembled, the first anchor bolt supporting structure and the second anchor bolt supporting structure are connected into a whole by the coupling nut, and the problem that one end of an anchor bolt cannot be fixed by a rigid device due to asynchronous excavation of two roadways on two sides of a narrow coal pillar in a mine section can be solved.
Description
Technical Field
The utility model belongs to the technical field of the colliery is strutted, especially, relate to a rock burst mine district section anchor bolt support early warning device for narrow coal pillar.
Background
The rock burst is a power phenomenon of sudden and violent damage caused by the instantaneous release of elastic deformation energy of coal mine roadways or coal rocks around a working face, and a mine with a rock burst coal seam is a rock burst mine. The sectional coal pillar generally refers to a protective coal pillar reserved between adjacent working faces in underground coal mining, and has very important significance in the aspects of ensuring the stability of a roadway, isolating the mined working faces and the like. However, the too wide coal pillar wastes coal resources, so the narrow coal pillar is a section coal pillar setting mode which is very popular in many mines at present.
For narrow coal pillars in rock burst mine areas, due to the fact that the size of the coal pillars is shortened, the stability of surrounding rocks inside the narrow coal pillars is inevitably reduced to a certain extent under the condition of bearing the same covering load, and the supporting requirements of the coal pillars and surrounding roadways are often difficult to achieve by adopting a conventional anchor rod supporting mode. In particular, in the conventional anchor bolt support, only one end of the anchor bolt is provided with a tray to generate pre-tightening force of the anchor bolt through torque applied by a nut so as to restrain surrounding rocks (referred to as a rigid restraint end), and the other end of the anchor bolt is positioned inside a coal pillar and is restrained by bonding the anchor bolt with the surrounding rocks through an anchoring agent (referred to as an anchoring end). Therefore, under the condition that joint cracks inside coal and rock mass cracks around the anchoring end are developed more due to secondary mining disturbance, the anchoring end is most likely to be incapable of providing enough constraint force to realize the supporting effect of the anchor rod, and therefore the anchor rod supporting early warning device for the narrow coal pillar in the rock burst mine section is provided to solve the problems.
SUMMERY OF THE UTILITY MODEL
The utility model aims to solve the technical problem that the shortcomings in the prior art are overcome, the anchor bolt support early warning device for the narrow coal pillar in the rock burst mine section is provided, the first anchor bolt support structure and the second anchor bolt support structure are arranged, so that supports fixed on the narrow coal pillar in the mine section all form rigid supports, a set of support system is shared by two roadways, the support cost is greatly saved, and the support effect of the anchor bolt support device is improved; the anchor bolt supporting device can be disassembled, the first anchor bolt supporting structure and the second anchor bolt supporting structure are connected into a whole by using the coupling nut, and the problem that one end of an anchor bolt cannot be fixed by a rigid device due to asynchronous excavation of two roadways on two sides of a narrow coal pillar in a mine section can be solved.
In order to solve the technical problem, the utility model discloses a technical scheme is: the utility model provides a rock burst mine section narrow for coal column anchor bolt support early warning device which characterized in that: the coal mine anchor rod support structure comprises a first anchor rod support structure arranged on one side of a narrow coal pillar of a mine section and a second anchor rod support structure arranged on the other side of the narrow coal pillar of the mine section and matched with the first anchor rod support structure, wherein the first anchor rod support structure and the second anchor rod support structure are connected through a coupling nut; the first anchor rod supporting structure and the second anchor rod supporting structure are identical in structure and are arranged in the same plane;
the first anchor rod supporting structure and the second anchor rod supporting structure respectively comprise a supporting anchor rod arranged in the anchor rod mounting hole and a position fixing mechanism arranged on the supporting anchor rod and used for fixing the supporting anchor rod; a slag-proof leather sheath is arranged on a support anchor rod in the first anchor rod support structure; the end portion of the support anchor rod, which is located outside the anchor rod mounting hole, is sleeved with an anchor rod dynamometer.
Foretell rock burst mine section anchor bolt support early warning device for narrow coal pillar, its characterized in that: the position fixing mechanism comprises a rigid constraint component arranged at the extending end of the support anchor rod and a calibration steel ring arranged at the extending end of the support anchor rod, and the outer side surface of the calibration steel ring is attached to the inner side wall of the anchor rod mounting hole; the rigid restraint assembly comprises a tray arranged on the support anchor rod and used for abutting against the narrow coal pillar of the mine section and a fixing nut arranged on the support anchor rod and used for fixing the position of the tray; and a spherical gasket is arranged between the tray and the fixing nut.
Foretell rock burst mine section anchor bolt support early warning device for narrow coal pillar, its characterized in that: the slag-proof leather sheath is sleeved on one end of the support anchor rod close to the calibration steel ring.
Foretell rock burst mine section anchor bolt support early warning device for narrow coal pillar, its characterized in that: and the outer side surface of the support anchor rod is provided with an external thread.
Foretell rock burst mine section anchor bolt support early warning device for narrow coal pillar, its characterized in that: the coupling nut is fixed to a support anchor of the second anchor-supporting structure.
Compared with the prior art, the utility model has the following advantage:
1. the utility model discloses a set up first stock supporting construction with the second stock supporting construction, make the support of fixing on the narrow coal pillar of mine section all form the rigid support, realized that two roadways share one set of supporting system, very big saving the supporting cost, improved the supporting effect of this stock supporting device; the anchor bolt supporting device can be disassembled, the first anchor bolt supporting structure and the second anchor bolt supporting structure are connected into a whole by using the coupling nut, and the problem that one end of an anchor bolt cannot be fixed by a rigid device due to asynchronous excavation of two roadways on two sides of a narrow coal pillar in a mine section can be solved.
2. In the utility model, the first anchor rod supporting structure and the second anchor rod supporting structure are both provided with the position fixing mechanisms, so that the supporting structures can be fixed on the narrow coal pillars in the mine sections, the narrow coal pillars in the mine sections can be effectively supported, and safety accidents caused by the failure of the position fixing mechanisms can be avoided; on the other hand, the success rate of butt joint of the first anchor rod supporting structure and the second anchor rod supporting structure in the anchor rod mounting hole can be ensured.
3. The utility model discloses the setting prevents that the sediment leather sheath can prevent that anchoring agent, piece or cinder etc. in the stock mounting hole from sliding or rolling to supporting the stock end, hindering first stock supporting construction with second stock supporting construction's connection.
4. The utility model discloses a set up the stock dynamometer detects the pulling force of the support stock in the narrow coal pillar of installation mine district section, prevents that the narrow coal pillar of mine district section from taking place big deformation, can play the warning effect to constructor, the emergence of prevention incident.
To sum up, the utility model, through the arrangement of the first anchor bolt supporting structure and the second anchor bolt supporting structure, the supports fixed on the narrow coal pillars in the mine section all form rigid supports, thereby realizing that two roadways share one supporting system, greatly saving the supporting cost and improving the supporting effect of the anchor bolt supporting device; the anchor bolt supporting device can be disassembled, the first anchor bolt supporting structure and the second anchor bolt supporting structure are connected into a whole by using the coupling nut, and the problem that one end of an anchor bolt cannot be fixed by a rigid device due to asynchronous excavation of two roadways on two sides of a narrow coal pillar in a mine section can be solved.
The technical solution of the present invention is further described in detail by the accompanying drawings and examples.
Drawings
Fig. 1 is a schematic view of the connection relationship between the first anchor rod supporting structure and the slag-proof leather sheath of the utility model.
Fig. 2 is a schematic view of the connection relationship between the second anchor supporting structure and the coupling nut of the present invention.
Fig. 3 is a usage state diagram of the present invention.
Description of reference numerals:
1-narrow coal pillar in mine section; 2-coupling nut; 3, supporting the anchor rod;
4, calibrating a steel ring; 5, a tray; 6, fixing a nut;
7-slag-proof leather sheath; 8, an anchor rod mounting hole; 9-spherical spacer;
10-a filler; 11-an anchoring agent; 13-anchor dynamometer.
Detailed Description
As shown in fig. 1 to 3, the present invention includes a first bolting structure disposed on one side of a narrow coal pillar 1 in a mine section and a second bolting structure disposed on the other side of the narrow coal pillar 1 in the mine section and matched with the first bolting structure, wherein the first bolting structure and the second bolting structure are connected by a coupling nut 2; the first anchor rod supporting structure and the second anchor rod supporting structure are identical in structure and are arranged in the same plane;
the first anchor bolt supporting structure and the second anchor bolt supporting structure respectively comprise a support anchor bolt 3 arranged in an anchor bolt mounting hole 8 and a position fixing mechanism which is arranged on the support anchor bolt 3 and used for fixing the support anchor bolt 3; a slag-proof leather sheath 7 is arranged on the support anchor rod 3 in the first anchor rod support structure; the end portion of the support anchor rod 3, which is located outside the anchor rod mounting hole 8, is sleeved with an anchor rod dynamometer 13.
When the anchor rod supporting device is actually used, the anchor rod supporting device is suitable for an area where the width of the narrow coal pillar 1 in the mine section is not more than 8m, and through the arrangement of the first anchor rod supporting structure and the second anchor rod supporting structure, the supports fixed on the narrow coal pillar 1 in the mine section form rigid supports, so that two roadways share one supporting system, the supporting cost is greatly saved, and the supporting effect of the anchor rod supporting device is improved; the anchor bolt supporting device can be disassembled, the first anchor bolt supporting structure and the second anchor bolt supporting structure are connected into a whole by the coupling nut 2, and the problem that one end of an anchor bolt cannot be fixed by a rigid device due to asynchronous excavation of two roadways on two sides of the narrow coal pillar 1 in a mine section can be solved.
The first anchor rod supporting structure and the second anchor rod supporting structure are respectively provided with a position fixing mechanism, so that on one hand, the supporting structures can be fixed on the narrow coal pillars 1 in the mine section, the narrow coal pillars 1 in the mine section can be effectively supported, and safety accidents caused by failure of the position fixing mechanisms are avoided; on the other hand, the success rate of butt joint of the first anchor bolt supporting structure and the second anchor bolt supporting structure in the anchor bolt mounting hole 8 can be ensured.
In addition, the slag-proof leather sheath 7 can prevent anchoring agents, scraps or coal slag and the like in the anchor rod mounting hole 8 from sliding or rolling to the end of the support anchor rod 3 to block the connection of the first anchor rod supporting structure and the second anchor rod supporting structure.
During actual use, the anchor rod dynamometer 13 is selected to be MCZ-600, the anchor rod dynamometer 13 detects and displays the tension of the support anchor rod 3, when a worker checks that the tension displayed by the anchor rod dynamometer 13 exceeds a tension threshold value, the situation that the narrow coal pillar 1 in the section where the support anchor rod 3 is located is about to deform greatly is shown, a warning effect can be played for constructors, and safety accidents are prevented.
It should be noted that, because the support anchor rod 3 of the first anchor rod supporting structure is supported for a period of time, the support anchor rod 3 of the second anchor rod supporting structure is connected with the first anchor rod supporting structure, in order to prevent that after the support anchor rod 3 of the first anchor rod supporting structure is anchored, some anchoring agents flow backwards to the end of the support anchor rod 3 of the first anchor rod supporting structure close to the second anchor rod supporting structure due to the action of gravity, so that threads on the outer surface of the support anchor rod 3 of the first anchor rod supporting structure are damaged, and the slag-proof leather sheath 7 is installed on the support anchor rod 3 of the first anchor rod supporting structure.
In this embodiment, the position fixing mechanism includes a rigid constraint component disposed at the extending end of the support anchor rod 3 and a calibration steel ring 4 disposed at the extending end of the support anchor rod 3, and the outer side surface of the calibration steel ring 4 is attached to the inner side wall of the anchor rod mounting hole 8; the rigid restraint assembly comprises a tray 5 arranged on the support anchor rod 3 and used for abutting against the narrow coal pillar 1 in the mine section and a fixing nut 6 arranged on the support anchor rod 3 and used for fixing the position of the tray 5; a spherical gasket 9 is arranged between the tray 5 and the fixing nut 6.
As shown in fig. 1 and 3, the calibration steel ring 4 is a rigid iron sheet clamped on the support anchor rod 3, and the diameter of the calibration steel ring is larger than that of the support anchor rod 3 but smaller than that of the anchor rod mounting hole 8, so as to ensure that the rod end is located at the circular point of the anchor rod mounting hole 8 as far as possible at the position in the hole after the support anchor rod 3 enters the anchor rod mounting hole 8, reduce the influence of the gravity on the bending of the support anchor rod 3, and ensure the success rate of the butt joint of the two support anchor rods 3.
As shown in fig. 1 and 3, in this embodiment, the slag-proof leather sheath 7 is sleeved on one end of the support anchor rod 3 close to the calibration steel ring 4.
During the in-service use, set up and prevent that cinder leather sheath 7 can prevent that anchoring agent, piece or cinder etc. in the stock mounting hole 8 from sliding or rolling to supporting 3 ends of stock, hindering first stock supporting construction with the connection of second stock supporting construction.
In this embodiment, an external thread is formed on the outer side surface of the support anchor rod 3.
During the in-service use, set up the effect of external screw thread on the support stock 3 and be: it is convenient the installation of position fixing mechanism also can improve the installation effectiveness when constructor connects two support stock 3 simultaneously.
As shown in fig. 2 and 3, in the present exemplary embodiment, the coupling nut 2 is fastened to the support bolt 3 of the second anchor structure.
In practice, the coupling nut 2 is the key component for connecting the two support bolts 3 and is welded to the end of the support bolt 3 of the second bolting configuration.
When the utility model is used, the anchor rod mounting hole 8 is drilled according to the coal bed condition, and the depth of the anchor rod mounting hole 8 is 1m longer than the width of the narrow coal pillar 1 in the mine section; then installing the first anchor rod supporting structure in the excavated roadway, placing the support anchor rod 3 of the first anchor rod supporting structure into the anchor rod installation hole 8, and injecting an anchoring agent into a gap between the support anchor rod 3 and surrounding rocks, wherein the injected anchoring agent does not flow to the end of the support anchor rod 3 due to the action of the slag-proof leather sheath 7, and filling a filler 10 into the gap of the anchor rod installation hole 8; then fixing the first bolting structure on one side of the narrow coal pillar 1 in the mine section by using the rigid restraining component; when a roadway on the other side is excavated, because the depth of the anchor rod mounting hole 8 is greater than the width of the narrow coal pillar 1 in the mine section, when the roadway on the other side is excavated, a constructor can quickly find the corresponding anchor rod mounting hole 8, install the second anchor rod supporting structure at the moment, place the support anchor rod 3 with the coupling nut 2 at the end into the anchor rod mounting hole 8 to be coupled with the support anchor rod 3 of the first anchor rod supporting structure, screw down after being aligned, fill the filler 10 in the gap of the anchor rod mounting hole 8, as shown in fig. 3, and finally fix the second anchor rod supporting structure on the other side of the narrow coal pillar 1 in the mine section by using the rigid restraining component on the second anchor rod supporting structure, thereby completing the overall supporting of the anchor rod supporting device.
The above, only be the utility model discloses a preferred embodiment, it is not right the utility model discloses do any restriction, all according to the utility model discloses the technical entity all still belongs to any simple modification, change and the equivalent structure change of doing above embodiment the utility model discloses technical scheme's within the scope of protection.
Claims (5)
1. The utility model provides a rock burst mine section narrow for coal column anchor bolt support early warning device which characterized in that: the coal mine anchor rod support structure comprises a first anchor rod support structure arranged on one side of a narrow coal pillar (1) of a mine section and a second anchor rod support structure arranged on the other side of the narrow coal pillar (1) of the mine section and matched with the first anchor rod support structure, wherein the first anchor rod support structure and the second anchor rod support structure are connected through a coupling nut (2); the first anchor rod supporting structure and the second anchor rod supporting structure are identical in structure and are arranged in the same plane;
the first anchor bolt supporting structure and the second anchor bolt supporting structure respectively comprise a supporting anchor bolt (3) arranged in an anchor bolt mounting hole (8) and a position fixing mechanism which is arranged on the supporting anchor bolt (3) and used for fixing the supporting anchor bolt (3); a slag-proof leather sheath (7) is arranged on a support anchor rod (3) in the first anchor rod support structure; the end portion, located outside the anchor rod mounting hole (8), of the support anchor rod (3) is sleeved with an anchor rod dynamometer (13).
2. The bolting early warning device for the rock burst mine section narrow coal pillar according to claim 1, wherein: the position fixing mechanism comprises a rigid constraint component arranged at the extending end of the support anchor rod (3) and a calibration steel ring (4) arranged at the extending end of the support anchor rod (3), and the outer side surface of the calibration steel ring (4) is attached to the inner side wall of the anchor rod mounting hole (8); the rigid restraint assembly comprises a tray (5) arranged on the support anchor rod (3) and used for abutting against the narrow coal pillar (1) in the mine section and a fixing nut (6) installed on the support anchor rod (3) and used for fixing the position of the tray (5); a spherical gasket (9) is arranged between the tray (5) and the fixing nut (6).
3. The bolting early warning device for the rock burst mine section narrow coal pillar according to claim 2, wherein: the slag-proof leather sheath (7) is sleeved on one end of the support anchor rod (3) close to the calibration steel ring (4).
4. The bolting early warning device for the rock burst mine section narrow coal pillar according to claim 1, wherein: and the outer side surface of the support anchor rod (3) is provided with an external thread.
5. The bolting early warning device for the rock burst mine section narrow coal pillar according to claim 1, wherein: the coupling nut (2) is fixed to a support anchor (3) of the second anchor-supporting construction.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202022148194.3U CN213331145U (en) | 2020-09-25 | 2020-09-25 | Rock bolt support early warning device for narrow coal pillar in rock burst mine section |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202022148194.3U CN213331145U (en) | 2020-09-25 | 2020-09-25 | Rock bolt support early warning device for narrow coal pillar in rock burst mine section |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN213331145U true CN213331145U (en) | 2021-06-01 |
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202022148194.3U Active CN213331145U (en) | 2020-09-25 | 2020-09-25 | Rock bolt support early warning device for narrow coal pillar in rock burst mine section |
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| Country | Link |
|---|---|
| CN (1) | CN213331145U (en) |
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2020
- 2020-09-25 CN CN202022148194.3U patent/CN213331145U/en active Active
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Address after: No. 518 Midong Road, Midong District, Urumqi, Xinjiang Uygur Autonomous Region Patentee after: State energy group Xinjiang Energy Co.,Ltd. Patentee after: XI'AN University OF SCIENCE AND TECHNOLOGY Address before: No. 518 Midong Road, Midong District, Urumqi, Xinjiang Uygur Autonomous Region Patentee before: SHENHUA XINJIANG ENERGY Co.,Ltd. Patentee before: XI'AN University OF SCIENCE AND TECHNOLOGY |
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| CP01 | Change in the name or title of a patent holder |