CN102071955B - Soft outburst coal seam tunneling reserved coal body reinforcement and outburst-proof method - Google Patents
Soft outburst coal seam tunneling reserved coal body reinforcement and outburst-proof method Download PDFInfo
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- CN102071955B CN102071955B CN 201010529759 CN201010529759A CN102071955B CN 102071955 B CN102071955 B CN 102071955B CN 201010529759 CN201010529759 CN 201010529759 CN 201010529759 A CN201010529759 A CN 201010529759A CN 102071955 B CN102071955 B CN 102071955B
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Abstract
Description
One, technical field:
The present invention relates to reinforcing technique in the colliery, particularly relate to the prominent coal seam of a kind of soft height tunneling reserved coal body and reinforce anti-burst method.
Two, background technology:
Formed a large amount of methane gas (Main Ingredients and Appearance is methane) and coal association in the coalification course, owing to be subjected to top rock mass pressure and perimeter constraint, these gases exist with larger density even with solid-state.In case be subject to mining influence, these gases can discharge rapidly, form methane gas and gush out.Take away exactly these gases (have be called again coal bed gas) so strengthen stope ventilation, the personnel that allow in underground work obtain normal air.When in the mining process because workplace pressure variation and technical measures and control measures when mishandling, just may form coal and Gas Outburst, at this moment a large amount of methane gas is inconjunction with broken coal and rushes out outward together, causes a tremendous loss of lives, and causes the damage of installations and facilities.Sometimes even blast occurs.Can both be effectively controlled in fact a lot of situations now.But because managerial skills and technical level even sense of responsibility wait situation about causing the accident still in generation not.
At present when coal mining, excavate in the tunnel and seam mining all needs the venting of punching first, common mode is that punching venting and exploitation are hocketed, namely before each exploitation, need to make a call to 20 meters dark holes along direction of extraction and be used for venting, only exploit 20 meters front 15 meters during each exploitation, remain 5 meters as carrying wall, on the basis of these 5 meters carrying walls, make a call to 20 meters hole along original hole continuation along direction of extraction, exploit wherein 15 meters, circulation is advanced successively again.Above-mentioned mining type can effectively prevent the generation of coal and Gas Outburst, and its coverage ratio can reach 99%.Yet because the gas pressure in the coal seam is indefinite, 5 meters not necessarily fully firm broken as carrying wall, even the reasons such as excessive or coal seam is soft adopt above-mentioned safe working measure also still might cause the generation of outstanding accident because of pressure.
Three, summary of the invention:
The present invention be directed to the defective and the deficiency that exist in the prior art, provide the prominent coal seam of a kind of soft height tunneling reserved coal body to reinforce anti-burst method.
Technical scheme:
The prominent coal seam of the soft height of the first tunneling reserved coal body is reinforced anti-burst method, may further comprise the steps:
Beat the dark air vent of L rice along direction of extraction when (1) exploiting first; Beat the dark air vent of N rice along production face when perhaps exploiting first, the coal seam of N-L rice, wherein N＞L before when exploitation, only exploiting;
(2) bracing means is installed and forms the thick carrying wall of L rice in the dark air vent of L rice, this bracing means comprises that two ends are all with externally threaded reinforcement connecting rod and a tapped sleeve pipe, Packed Anchor Agent distributes on the outside of sleeve face, sleeve pipe is placed the dark air vent root of L rice, rotation is strengthened connecting rod and is entered sleeve pipe and make the outside of sleeve wall and cause Anchor Agent to outflow with the coal body friction, perhaps will strengthen first connecting rod precession sleeve pipe and together enter the dark air vent root of L rice, outside of sleeve wall and coal body friction cause the Anchor Agent outflow when strengthening connecting rod by rotation;
(3) overlap the nut that Upper gasket and external screw thread screw coupling in reinforcement connecting rod outer end;
(4) beat the dark air vent of M rice in other parts of production face along direction of extraction again;
(5) cancel the reinforcement connecting rod of bracing means in the step (2), the coal seam of only exploiting again front M-L rice along direction of extraction;
(6) repeat successively above step (2)～(5).
With a breaking joint, and the external thread diameter of strengthening connecting rod the inner is greater than the sleeve pipe internal thread diameter at least for sleeve pipe in the step (2), needs during installation first sleeve pipe is fit into will strengthen connecting rod behind the dark air vent root of L rice by force in the precession sleeve pipe again.
In step (3), adopt simultaneously the rib connecting rod that each outer end of strengthening connecting rod is connected and fixed.
Box face is provided with the cyclic spring catch, and the external profile diameter of this cyclic spring catch is greater than the lateral surface diameter of sleeve pipe, and the screw thread entrance of sleeve pipe is the bell mouth shape structure.
Described sleeve pipe is that the above curved pipe of two halves combines by seam crossing is gluing.
The prominent coal seam of the soft height of the second tunneling reserved coal body is reinforced anti-burst method, may further comprise the steps:
(1) edge becomes the direction of angle α to beat air vent with direction of extraction on production face, and the root of this air vent is arranged in sidewall rock stratum, coal seam;
(2) carrying wall that bracing means formation coal seam and rock stratum are fixed as one is installed in air vent, this bracing means comprises that two ends are all with externally threaded reinforcement connecting rod and a tapped sleeve pipe, Packed Anchor Agent distributes on the outside of sleeve face, sleeve pipe is placed the air vent root, rotation is strengthened connecting rod and is entered sleeve pipe and make the outside of sleeve wall and cause Anchor Agent to outflow with the coal body friction, perhaps will strengthen first connecting rod precession sleeve pipe and together enter the air vent root, outside of sleeve wall and coal body friction cause the Anchor Agent outflow when strengthening connecting rod by rotation;
(3) overlap the nut that Upper gasket and external screw thread screw coupling in reinforcement connecting rod outer end;
(4) on production face, beat again the air vent of M ' Mi Shen along direction of extraction;
(5) cancel the reinforcement connecting rod of bracing means in the step (2), the coal seam of only exploiting again front M '-L ' rice along direction of extraction;
(6) repeat successively above step (1)～(3);
(7) on production face, come again the air vent of L ' Mi Shen to continue to beat the air vent that total length is M ' Mi Shen along direction of extraction along the Kaiyuan;
(8) repeat successively (1), (2), (3), (4), (7) step.
With a breaking joint, and the external thread diameter of strengthening connecting rod the inner is greater than the sleeve pipe internal thread diameter at least for sleeve pipe in the step (2), needs during installation first sleeve pipe is fit into will strengthen connecting rod behind the air vent root by force in the precession sleeve pipe again.
In step (3), adopt simultaneously the rib connecting rod that each outer end of strengthening connecting rod is connected and fixed.
Box face is provided with the cyclic spring catch, and the external profile diameter of this cyclic spring catch is greater than the lateral surface diameter of sleeve pipe, and the screw thread entrance of sleeve pipe is the bell mouth shape structure.
Described sleeve pipe is that the above curved pipe of two halves combines by seam crossing is gluing.
Beneficial effect of the present invention:
1, coal seam of the present invention reinforcement means utilizes the movable fixing mode of stationary links and fixed sleeving that the coal seam is reinforced, and guarantees the firmness degree of carrying wall, effectively stops not clear because of the coal seam internal pressure or the soft accident that causes of ature of coal is outstanding.
2, coal seam of the present invention reinforcement means realizes that easily result of use is good, is beneficial to very much in the field of mining promotion and implementation.
Four, description of drawings:
Fig. 1 is the syndeton schematic diagram of strengthening connecting rod and sleeve pipe among the present invention;
Fig. 2 is the A-A cross-sectional view of Fig. 1;
Fig. 3 is the spreading structural representation of Fig. 2;
The installment state schematic diagram of Fig. 4 and coal seam of the present invention bracing means;
Fig. 5 is one of perspective view of installing and fixing simultaneously of a plurality of coal seams of the present invention bracing means;
Two of the perspective view that Fig. 6 a plurality of coal seams of the present invention bracing means installs and fixes simultaneously;
Fig. 7 adopts " D " type to heighten the fixing structural representation of pad;
Fig. 8 is the use state reference map of precession accessory.
Fig. 9 is the prismatic fit structure of strengthening connecting rod end;
Figure 10 is three of ruggedized construction schematic diagram of the present invention.
Five, the specific embodiment:
Embodiment one: the prominent coal seam of a kind of soft height tunneling reserved coal body is reinforced anti-burst method, may further comprise the steps:
Beat the dark air vent of L rice along direction of extraction when (1) exploiting first, this L rice is approximately 5 meters, and in fact first punching only is fixing for following steps, processes with venting hardly; The span of L rice can be a desired value between 2 meters-6 meters.
(2) bracing means is installed and forms the thick carrying wall of L rice in the dark air vent of L rice.This bracing means comprises that two ends are all with externally threaded reinforcement connecting rod and a tapped sleeve pipe, Packed Anchor Agent distributes on the outside of sleeve face, sleeve pipe is placed the dark air vent root of L rice, and rotation is strengthened connecting rod and is entered sleeve pipe and make the outside of sleeve wall and cause Anchor Agent to outflow with the coal body friction.
(3) overlap the nut that Upper gasket and external screw thread screw coupling in reinforcement connecting rod outer end.
The carrying wall that forms can make unquarried coal seam with extraneous effectively isolation and reinforce, and prevents the generation of giving prominence to when its objective is the coal seam punching to the carrying wall rear side.
(4) beat the dark air vent of M rice in other parts of production face along direction of extraction again, because the existence of carrying wall also is difficult to break through firm carrying wall even run into the gas of high pressure when continuing punching.
(5) cancel the reinforcement connecting rod of bracing means in the step (2), the coal seam of only exploiting again front M-L rice along direction of extraction.
(6) repeat successively above step (2)～(5).
In the present embodiment, adopt simultaneously the rib connecting rod that each outer end of strengthening connecting rod is connected and fixed in step (3), referring to Fig. 6.
The bracing means that is used for the reinforcement means of present embodiment, referring to Fig. 1, Fig. 2, Fig. 3, among the figure, numbering 1 is for strengthening connecting rod, 2 is sleeve pipe, and 3 is screwed hole, and 4 is the Anchor Agent chamber, and 5 is the dentation fin, 6 is outer tube, and 7 is claw, and 8 are the cracking seam, and 9 is the connecting rod external thread section, 10 is nut, and 11 is pad, and 12 is the coal seam, and 13 is the rib connecting rod, 14 is " D " type pad, and 15 is air vent, and 16 is the elastic block piece of annular, 17 is terminal prismatic, and 18 is the option accessory, and 19 is the rock stratum.The coal seam bracing means comprises all screwed reinforcement connecting rods 1 of two ends, sleeve pipe 2 with a breaking joint, this cover tube hub is provided with blind hole 3 (perhaps through hole) and is provided with screw thread along axis direction, be distributed with groove and be sealed with Anchor Agent 4 on sleeve pipe 2 outer circumference and/or at the sleeve pipe inner face, the outer end coupling of described reinforcement connecting rod 1 has nut 10 and pad 11.Reinforcement connecting rod and the sleeve pipe internal thread of the bracing means that adopts in the present embodiment namely mate, can both be fitted together in the air vent outside, the Anchor Agent capsule of this structural requirement outside of sleeve wall sealing is rubbed easily and is broken, the reinforcement connecting rod that links together and sleeve pipe are goed deep into after air vent stretches out together, the Anchor Agent capsule breaks and exposes Anchor Agent when strengthening connecting rod by rotation, and Anchor Agent combines closely sleeve pipe and coal seam after solidifying.
Be provided with the elastic block piece 16 of annular in the outer face of described sleeve pipe 2, the external profile diameter of this elastic block piece is greater than the lateral surface diameter of sleeve pipe, and the effect of this elastic block piece is to make sleeve pipe be sealed in the inboard.
Embodiment two: content and embodiment one are basic identical, and something in common does not repeat, and different is that step (1) is changed into: beat the dark air vent of N rice along production face when exploiting first, the coal seam of N-L rice, wherein N＞L before only exploiting when exploitation.
Embodiment three: referring to Fig. 1-Fig. 5, content and embodiment one are basic identical, and something in common does not repeat, and different is: realize in the employed bracing means of this reinforcement means step (2), sleeve pipe at least with a breaking joint, and the external thread diameter d of described reinforcement connecting rod the inner 1Internal thread diameter d greater than sleeve pipe central blind hole (or through hole) 2Need during installation first sleeve pipe to be fit into and to strengthen again connecting rod behind the dark air vent root of L rice by force in the precession sleeve pipe.In fact, the diameter approximate match (perhaps the sleeve pipe external diameter is slightly less than the coal bore dia) of the external diameter of sleeve pipe and coal hole (air vent), sleeve pipe can easily be advanced at the bottom of coal hole depth place to the hole.The general higher engineering plastics of intensity that adopt of sleeve pipe 2 are strengthened connecting rod and are then adopted reinforcing bar, can certainly adopt other materials, such as the plastic bar with higher-strength etc.Non-easy for installation, the screw thread entrance is the bell mouth shape structure in the sleeve pipe outer end, makes the reinforcement connecting rod be easy to insert in the sleeve pipe.
The groove that is positioned on the outside of sleeve circumference evenly distributes, and segmentation distributes the dentation fin 5 that forms between each adjacent grooves.
Be positioned at least one claw 7 that groove on the sleeve pipe inner face is provided with protrusion.
Be set with one deck outer embrane 6 at the outside of sleeve face, Anchor Agent is sealed in the cavity between groove and the outer embrane.
Embodiment four: accompanying drawing is not drawn, and content and embodiment three are basic identical, and something in common does not repeat, and different is: described sleeve pipe is that the above curved pipe of two halves combines by seam crossing is gluing.In the time of will strengthening in the connecting rod insertion sleeve pipe, because of the external diameter of strengthening connecting rod blind hole or the through hole greater than the cover tube hub, cause the Zhang Lie of sleeve pipe, sleeve pipe is opened strong and is followed rotation, the Anchor Agent that stores in its external surface cavity breaks excessive, is integrated thereby sleeve pipe and coal seam are firm.
Embodiment five: referring to Fig. 6, content and embodiment one are basic identical, and something in common does not repeat, and different is: also be fixed with the rib connecting rod in reinforcement connecting rod outer end.By being connected to each other the formation net structure, further increase the firmness degree of carrying wall between each rib connecting rod.
Embodiment six: referring to Fig. 8, content and embodiment one are basic identical, and something in common does not repeat, and different is: being sleeved on the pad of strengthening the connecting rod outer end is that cross section is the pad of heightening of " D " type.
Embodiment seven: referring to Fig. 9, content and embodiment three are basic identical, something in common does not repeat, different is: for screwing of convenient and reinforcement connecting rod, be provided with prism or the strip fixed block of regular polygon at the end of this reinforcement connecting rod, for example regular hexagon or square or cuboid, the external diameter of this polygon prism or fixed block all are not more than the bracing piece external diameter so that pad and nut are installed.The Special rotary fitted component is referring to label 18, and this accessory is provided with a hole with polygon prism or fixed block, and handle, and is easy to use.
Embodiment eight: accompanying drawing is not drawn, content and embodiment three are basic identical, something in common does not repeat, different is: generally need to use special-purpose screwing tool when strengthening connecting rod precession sleeve pipe, this screwing tool has multiple pattern, and its purpose all is that reinforcement connecting rod precession sleeve pipe is got final product, and this precession instrument for example can be a bonding nut, suit is with handled coupling lasso in the nut outside, by the swivelling cover lasso reinforcement connecting rod is made a forcible entry in the sleeve pipe.
Embodiment nine: accompanying drawing is not drawn, content and embodiment three are basic identical, something in common does not repeat, and different is: also be provided with one section diameter less than the backstay of sleeve pipe screw on the inner of strengthening connecting rod, be convenient to afterwards precession operation so that the inner of reinforcement connecting rod is positioned at sleeve pipe always.
According to above each embodiment, the mode of the Anchor Agent that stores in the outside of sleeve wall can also have other forms, and is for example uniform porose on the outside of sleeve wall, each hole inseam dress Anchor Agent.In addition, the seam of Anchor Agent fills various informative, not necessarily takes the form of embodiment one described employing outer tube, can be separately installed with a membrane Anchor Agent capsule in each groove.The groove distribution form of outside of sleeve is various, can be continuous groove or the forms such as interrupted groove and saw-tooth grooves.When the through hole of cover tube hub is blind hole, also can at its end face the Anchor Agent capsule be installed simultaneously, also the claw of different model can be set at end face, so that firmly be that the resistance that prevents sleeve rotating is provided when strengthening connecting rod precession sleeve pipe.
Embodiment ten: the prominent coal seam of another kind of soft height tunneling reserved coal body is reinforced anti-burst method, may further comprise the steps:
(1) edge becomes the direction of angle α to beat air vent with direction of extraction on production face, and the root of this air vent is arranged in sidewall rock stratum, coal seam;
(2) carrying wall that bracing means formation coal seam and rock stratum are fixed as one is installed in air vent, this bracing means comprises that two ends are all with externally threaded reinforcement connecting rod and a tapped sleeve pipe, Packed Anchor Agent distributes on the outside of sleeve face, sleeve pipe is placed the air vent root, rotation is strengthened connecting rod and is entered sleeve pipe and make the outside of sleeve wall and cause Anchor Agent to outflow with the coal body friction, perhaps will strengthen first connecting rod precession sleeve pipe and together enter the air vent root, outside of sleeve wall and coal body friction cause the Anchor Agent outflow when strengthening connecting rod by rotation;
(3) overlap the nut that Upper gasket and external screw thread screw coupling in reinforcement connecting rod outer end;
(4) on production face, beat again the air vent of M ' Mi Shen along direction of extraction;
(5) cancel the reinforcement connecting rod of bracing means in the step (2), the coal seam of only exploiting again front M '-L ' rice along direction of extraction;
(6) repeat successively above step (1)～(3);
(7) on production face, come again the air vent of L ' Mi Shen to continue to beat the air vent that total length is M ' Mi Shen along direction of extraction along the Kaiyuan;
(8) repeat successively (1), (2), (3), (4), (7) step.
Embodiment 11: content and embodiment ten are basic identical, something in common does not repeat, different is: the sleeve pipe in the step (2) is at least with a breaking joint, and strengthen the external thread diameter of connecting rod the inner greater than the sleeve pipe internal thread diameter, need during installation first sleeve pipe is fit into and to strengthen again connecting rod behind the air vent root by force in the precession sleeve pipe.Box face is provided with the cyclic spring catch, and the external profile diameter of this cyclic spring catch is greater than the lateral surface diameter of sleeve pipe, and the screw thread entrance of sleeve pipe is the bell mouth shape structure.
Embodiment 12: content and embodiment ten are basic identical, and something in common does not repeat, and different is: in step (3), adopt simultaneously the rib connecting rod that each outer end of strengthening connecting rod is connected and fixed.
Embodiment 13: referring to Fig. 7, content and embodiment ten are basic identical, and something in common does not repeat, and different is: the Combination of Methods of embodiment one and embodiment ten is used.
Embodiment 14: referring to Figure 10, content and embodiment ten are basic identical, something in common does not repeat, different is: Figure 10 has shown the exploitation situation that often runs in process of coal mining, 20 is the tunnel, normal conditions need to be to the in advance just coal seam processing of exitting first, but the darker increase that will cause workload of the degree of depth of air vent.Reality is, because managerial skills and technical level even sense of responsibility cause the air vent degree of depth of both sides inadequate not, thereby caused the middle part of working seam to form blank tape, the high pressure gas that exists in this blank tape may cause serious outstanding accident, and the utility model just can carry out the venting processing while exploiting for this blank tape.
Claims (10)
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 201010529759 CN102071955B (en) | 2010-11-03 | 2010-11-03 | Soft outburst coal seam tunneling reserved coal body reinforcement and outburst-proof method |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 201010529759 CN102071955B (en) | 2010-11-03 | 2010-11-03 | Soft outburst coal seam tunneling reserved coal body reinforcement and outburst-proof method |
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| CN102071955A CN102071955A (en) | 2011-05-25 |
| CN102071955B true CN102071955B (en) | 2013-01-23 |
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Citations (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| GB2126679A (en) * | 1982-08-02 | 1984-03-28 | Jacob Brauner | Fixing device |
| WO2004010010A1 (en) * | 2002-07-18 | 2004-01-29 | Kew Kunststofferzeugnisse Gmbh Wilthen | Fixing system and method |
| CN101575983A (en) * | 2009-02-27 | 2009-11-11 | 河南省煤层气开发利用有限公司 | Directional fracturing permeability improvement outburst elimination method in coal mine and device thereof. |
| CN101586441A (en) * | 2009-07-01 | 2009-11-25 | 煤炭科学研究总院重庆研究院 | High-pressure water jet system and method for drilling and enlarging holes on coal bed |
| CN101614133A (en) * | 2009-07-14 | 2009-12-30 | 中国矿业大学 | High pressure jet drilling and slotting integration pressure-release anti-burst method |
| CN101614134A (en) * | 2009-07-15 | 2009-12-30 | 中国矿业大学 | Bore, quick-fried, take out Trinity pressure-relief outburst-prevention method |
-
2010
- 2010-11-03 CN CN 201010529759 patent/CN102071955B/en not_active IP Right Cessation
Patent Citations (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| GB2126679A (en) * | 1982-08-02 | 1984-03-28 | Jacob Brauner | Fixing device |
| WO2004010010A1 (en) * | 2002-07-18 | 2004-01-29 | Kew Kunststofferzeugnisse Gmbh Wilthen | Fixing system and method |
| CN101575983A (en) * | 2009-02-27 | 2009-11-11 | 河南省煤层气开发利用有限公司 | Directional fracturing permeability improvement outburst elimination method in coal mine and device thereof. |
| CN101586441A (en) * | 2009-07-01 | 2009-11-25 | 煤炭科学研究总院重庆研究院 | High-pressure water jet system and method for drilling and enlarging holes on coal bed |
| CN101614133A (en) * | 2009-07-14 | 2009-12-30 | 中国矿业大学 | High pressure jet drilling and slotting integration pressure-release anti-burst method |
| CN101614134A (en) * | 2009-07-15 | 2009-12-30 | 中国矿业大学 | Bore, quick-fried, take out Trinity pressure-relief outburst-prevention method |
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| Publication number | Publication date |
|---|---|
| CN102071955A (en) | 2011-05-25 |
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