CN102777196A - Complementary supporting method of zoom backstopping roadway - Google Patents
Complementary supporting method of zoom backstopping roadway Download PDFInfo
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- CN102777196A CN102777196A CN2012102820260A CN201210282026A CN102777196A CN 102777196 A CN102777196 A CN 102777196A CN 2012102820260 A CN2012102820260 A CN 2012102820260A CN 201210282026 A CN201210282026 A CN 201210282026A CN 102777196 A CN102777196 A CN 102777196A
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- reinforcing bar
- roofbolt
- anchor pole
- tunnel
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Abstract
The invention particularly relates to a complementary supporting method of a zoom backstopping roadway. The complementary supporting method solves the problem that the zoom backstopping roadway using a traditional supporting method is apt to have nonlinearity large deformation and local instability from certain one or several weak links of a support body and further causes instability and damage to the whole support structure. The complementary supporting method of the zoom backstopping roadway adopts a lengthened anchor fixing anchor rod combined support method and uses a reasonable distribution mode and parameters to achieve roadway support. The complementary supporting method reduces labor intensity of workers, removes safety hidden dangers, is favorable for roadway maintenance, is favorable for production organization, and has good economic benefits and social benefits.
Description
Technical field
The present invention relates to combine the supporting method of putting coal mining roadway, be specially a kind of comprehensive putting back to and adopt the complementary supporting method in tunnel.
Background technology
Longwall top coal caving generally comprises haulage gate tunnel, air return way tunnel etc. under the coal mine, is referred to as to combine to put back to adopt the tunnel.During the high seam top coal caving, combine to put back to and adopt the tunnel and receive problems such as the difficult supporting of mining influence, roadway deformation be serious outstanding.The country rock in the especially full coal road road of stope drift active workings has inherent destabilizing factors such as intensity is low, cranny development; Often do not stablize the rock stratum in the anchor rod effective length; Add the influence of dynamic pressure; Cause and combine that to put back to the interaction mechanism of adopting between roadway surrounding rock and prop complicated and changeable, there is one-sidedness in support theories such as existing theoretical compound beam, the built-up arch mechanism of action, only are in qualitative understanding for supporting mechanism and design theory; Still the comprehensive theory that does not have a cover be fit to combine to put back to adopt tunnelling and stoping period is as the guidance of production practices, causes blindness and the waste of support material in the design.Supporting design system organic conception lacks, and it is out in the cold that the base plate anchor structure forms whole importance, causes two to help to shrink and the top board large deformation because floor lift in gallery is excessive, even the serious consequence of unstability.The stope drift active workings distortion that influenced by dynamic pressure is very big; The scalable amount of intensity, elongation per unit length and the pressure-relieving achor bar of traditional anchor pole (rope) can not satisfy the large deformation of stope drift active workings country rock far away; Cause anchor pole under the impact of dynamic pressure effect (rope) to be broken and lose supporting effect, cause the tunnel that serious consequences such as roof fall take place at last.Put back to the dynamic pressure disturbance ambient stress of adopting the residing complicacy of roadway engineering rock mass owing to combine; Make to combine to put back to and adopt the more common tunnel of mechanical characteristic that the roadway engineering rock mass shows and be very different; Under the influence of strong dynamic pressure; Show the mechanics phenomenon of non-linear large deformation, and the destruction of its prop is not whole unexpected unstability; But at first produce non-linear large deformation, local buckling, and then cause whole supporting and protection structure unstability, destruction from some or several weak links of prop.Now also lack a kind of supporting method of strengthening weak links, making prop and country rock cooperative transformation, realize putting back to the effective support of adopting the tunnel combining.
Summary of the invention
The present invention to adopt the tunnel and when adopting traditional supporting method, at first produces non-linear large deformation, local buckling from some or several weak links of prop easily in order to solve to combine to put back to; And then cause the problem of whole supporting and protection structure unstability, destruction, provide a kind of comprehensive putting back to adopt the complementary supporting method in tunnel.
The present invention adopts following technical scheme to realize: combine to put back to and adopt the complementary supporting method in tunnel, adopt resin lengthening anchoring rod combination supporting mode, the top, tunnel is uniformly distributed with anchoring has some roofbolts; Roofbolt selects for use the left-handed nothing of 18# to indulge muscle high-strength screw-thread steel muscle, roofbolt length 2400mm, and roofbolt bar tail screw thread is M20; The roofbolt anchorage style adopts the anchoring of resin lengthening, selects a Z2360 and a K2335 resin anchoring agent for use, and bore diameter is 28mm; Anchorage length is 1300mm, and the anchor pole end is fixed with composite pallet, is supported with the reinforcing bar joist on the composite pallet; The reinforcing bar joist is the rectangle roof beam structure that the reinforcing bar by 14mm is welded, and the width of reinforcing bar joist is 80mm, and length is 3200mm; In every row's roofbolt; Two roofbolts at two ends become 10 degree to two tilt and with vertical line, other roofbolt is vertically installed, and is fixed with diamond mesh between reinforcing bar joist and back; Tunnel portion of group is uniformly distributed with anchoring has portion of group anchor pole, and it is the glass fibre reinforced plastics rockbolts of 18mm that portion of group anchor pole is selected diameter for use, and portion of group rock-bolt length is 2000mm; Portion of group anchor pole bar tail screw thread is M20, and portion of group anchor pole adopts the end anchorage of Z2360 resin, and portion of group anchor pole end is fixed with arch form high strength pallet; Arch form high strength pallet is pressed abd fixed on tunnel portion of group with reinforcing bar joist and diamond mesh; The reinforcing bar joist adopts the reinforcing bar of 14mm to be welded, and the width of reinforcing bar joist is 80mm, and length is 2600mm; The array pitch of roofbolt and portion of group anchor pole is 800mm, 8 anchor poles of every row, and the spacing between every row's anchor pole is 900mm; Top, tunnel and portion of group are fixed with anchor cable in addition, and the anchor cable diameter is 15.24mm, and anchor cable length is 6300mm; Anchor cable adopts the anchoring that extends of a K2335 and two Z2360 resin explosive rolls; 1 of the every row of anchor cable, array pitch is 1200mm, anchor cable head is provided with the resin explosive roll stirring-head; Afterbody is furnished with the high strength ground tackle, and the supporting metal pallet size of anchor cable is 300 * 300 * 12mm.
The installation steps of each parts of supporting among the present invention and technology are that those skilled in the art realize easily.Selected component are common part under the coal mine.And the selection of each supporting parameter obtains through a large amount of experiments and Theoretical Calculation among the present invention, has so just guaranteed: anchor rod body modulus of elasticity and country rock modulus of elasticity are complementary; Anchor pole material pallet intensity is less than the anchor pole strength of materials, and the anchor pole pallet dimension splits structure greater than piece; The reinforcing bar joist has reached supporting intensity.
Beneficial effect of the present invention is following: adopt new supporting new concept, each anchoring piece and supporter synergy has in letting to let in anti-, anti-; Can maximally utilise the self-supporting ability of country rock; Simultaneously when enough supporting drags are provided; Utilize anchor pole in the inner relative displacement that takes place of anchor hole, discharge effectively the dilatancy deformation energy in the country rock during the driving and with working face extraction during the pressure that gathers; Anchor cable has bigger elongation, effectively adopts the extendible requirement in tunnel that dynamic pressure causes with comprehensive the putting back to of stoping period during the control driving; Realized the optimum organization between prop and country rock, thereby made support system reach complementary best supporting state.The present invention reduced working strength of workers, eliminated potential safety hazard, help the tunnel maintenance, help organism of production, have good economic benefit and social benefit.
The specific embodiment
Combine to put back to and adopt the complementary supporting method in tunnel, adopt resin lengthening anchoring rod combination supporting mode, the top, tunnel is uniformly distributed with anchoring has some roofbolts; Roofbolt selects for use the left-handed nothing of 18# to indulge muscle high-strength screw-thread steel muscle, roofbolt length 2400mm, and roofbolt bar tail screw thread is M20; The roofbolt anchorage style adopts the anchoring of resin lengthening, selects a Z2360 and a K2335 resin anchoring agent for use, and bore diameter is 28mm; Anchorage length is 1300mm, and the anchor pole end is fixed with composite pallet, is supported with the reinforcing bar joist on the composite pallet; The reinforcing bar joist is the rectangle roof beam structure that the reinforcing bar by 14mm is welded, and the width of reinforcing bar joist is 80mm, and length is 3200mm; In every row's roofbolt; Two roofbolts at two ends become 10 degree to two tilt and with vertical line, other roofbolt is vertically installed, and is fixed with diamond mesh between reinforcing bar joist and back; Tunnel portion of group is uniformly distributed with anchoring has portion of group anchor pole, and it is the glass fibre reinforced plastics rockbolts of 18mm that portion of group anchor pole is selected diameter for use, and portion of group rock-bolt length is 2000mm; Portion of group anchor pole bar tail screw thread is M20, and portion of group anchor pole adopts the end anchorage of Z2360 resin, and portion of group anchor pole end is fixed with arch form high strength pallet; Arch form high strength pallet is pressed abd fixed on tunnel portion of group with reinforcing bar joist and diamond mesh; The reinforcing bar joist adopts the reinforcing bar of 14mm to be welded, and the width of reinforcing bar joist is 80mm, and length is 2600mm; The array pitch of roofbolt and portion of group anchor pole is 800mm, 8 anchor poles of every row, and the spacing between every row's anchor pole is 900mm; Top, tunnel and portion of group are fixed with anchor cable in addition, and the anchor cable diameter is 15.24mm, and anchor cable length is 6300mm; Anchor cable adopts the anchoring that extends of a K2335 and two Z2360 resin explosive rolls; 1 of the every row of anchor cable, array pitch is 1200mm, anchor cable head is provided with the resin explosive roll stirring-head; Afterbody is furnished with the high strength ground tackle, and the supporting metal pallet size of anchor cable is 300 * 300 * 12mm.
Claims (1)
1. comprehensive putting back to adopted the complementary supporting method in tunnel, adopts resin lengthening anchoring rod combination supporting mode, and it is characterized in that: the top, tunnel is uniformly distributed with anchoring has some roofbolts; Roofbolt selects for use the left-handed nothing of 18# to indulge muscle high-strength screw-thread steel muscle, roofbolt length 2400mm, and roofbolt bar tail screw thread is M20; The roofbolt anchorage style adopts the anchoring of resin lengthening, selects a Z2360 and a K2335 resin anchoring agent for use, and bore diameter is 28mm; Anchorage length is 1300mm, and the anchor pole end is fixed with composite pallet, is supported with the reinforcing bar joist on the composite pallet; The reinforcing bar joist is the rectangle roof beam structure that the reinforcing bar by 14mm is welded, and the width of reinforcing bar joist is 80mm, and length is 3200mm; In every row's roofbolt; Two roofbolts at two ends become 10 degree to two tilt and with vertical line, other roofbolt is vertically installed, and is fixed with diamond mesh between reinforcing bar joist and back; Tunnel portion of group is uniformly distributed with anchoring has portion of group anchor pole, and it is the glass fibre reinforced plastics rockbolts of 18mm that portion of group anchor pole is selected diameter for use, and portion of group rock-bolt length is 2000mm; Portion of group anchor pole bar tail screw thread is M20, and portion of group anchor pole adopts the end anchorage of Z2360 resin, and portion of group anchor pole end is fixed with arch form high strength pallet; Arch form high strength pallet is pressed abd fixed on tunnel portion of group with reinforcing bar joist and diamond mesh; The reinforcing bar joist adopts the reinforcing bar of 14mm to be welded, and the width of reinforcing bar joist is 80mm, and length is 2600mm; The array pitch of roofbolt and portion of group anchor pole is 800mm, 8 anchor poles of every row, and the spacing between every row's anchor pole is 900mm; Top, tunnel and portion of group are fixed with anchor cable in addition; The anchor cable diameter is 15.24mm, and anchor cable length is 6300mm, and anchor cable adopts the anchoring that extends of a K2335 and two Z2360 resin explosive rolls; 1 of the every row of anchor cable; Array pitch is 1200mm, and anchor cable head is provided with the resin explosive roll stirring-head, and the supporting metal pallet size of anchor cable is 300 * 300 * 12mm.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2012102820260A CN102777196A (en) | 2012-08-09 | 2012-08-09 | Complementary supporting method of zoom backstopping roadway |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2012102820260A CN102777196A (en) | 2012-08-09 | 2012-08-09 | Complementary supporting method of zoom backstopping roadway |
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| CN102777196A true CN102777196A (en) | 2012-11-14 |
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| CN2012102820260A Pending CN102777196A (en) | 2012-08-09 | 2012-08-09 | Complementary supporting method of zoom backstopping roadway |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103670470A (en) * | 2013-12-31 | 2014-03-26 | 大同煤矿集团有限责任公司 | Full coal roadway safe and speedy drivage supporting method |
Citations (6)
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|---|---|---|---|---|
| DE2547580A1 (en) * | 1975-10-24 | 1977-04-28 | Upat Max Langensiepen Kg | Corrosion protection for tunnel anchoring rods - produced by enveloping in polyurethane foam where not cemented in rock |
| CN2731106Y (en) * | 2004-09-09 | 2005-10-05 | 李金奎 | Support and protection system for anchor shell |
| CN101493011A (en) * | 2008-12-30 | 2009-07-29 | 中国科学院武汉岩土力学研究所 | Soft expansion type wall rock tunnel support method |
| CN101886546A (en) * | 2010-07-06 | 2010-11-17 | 铁法煤业(集团)有限责任公司大兴煤矿 | Method for inhibiting roof deformation of coal mine underground bolt and anchor cable roadway |
| CN101906977A (en) * | 2010-07-21 | 2010-12-08 | 中国矿业大学(北京) | Method for preventing and treating large deformation and collapse of softrock tunnel |
| CN102562093A (en) * | 2012-02-21 | 2012-07-11 | 山东盛大矿业股份有限公司 | Full-length anchoring supporting method with intensive resin anchor rod and anchor-shotcrete net |
-
2012
- 2012-08-09 CN CN2012102820260A patent/CN102777196A/en active Pending
Patent Citations (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| DE2547580A1 (en) * | 1975-10-24 | 1977-04-28 | Upat Max Langensiepen Kg | Corrosion protection for tunnel anchoring rods - produced by enveloping in polyurethane foam where not cemented in rock |
| CN2731106Y (en) * | 2004-09-09 | 2005-10-05 | 李金奎 | Support and protection system for anchor shell |
| CN101493011A (en) * | 2008-12-30 | 2009-07-29 | 中国科学院武汉岩土力学研究所 | Soft expansion type wall rock tunnel support method |
| CN101886546A (en) * | 2010-07-06 | 2010-11-17 | 铁法煤业(集团)有限责任公司大兴煤矿 | Method for inhibiting roof deformation of coal mine underground bolt and anchor cable roadway |
| CN101906977A (en) * | 2010-07-21 | 2010-12-08 | 中国矿业大学(北京) | Method for preventing and treating large deformation and collapse of softrock tunnel |
| CN102562093A (en) * | 2012-02-21 | 2012-07-11 | 山东盛大矿业股份有限公司 | Full-length anchoring supporting method with intensive resin anchor rod and anchor-shotcrete net |
Non-Patent Citations (1)
| Title |
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| 袁国栋: "煤巷锚杆支护技术的应用与实践", 《工业设计》 * |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103670470A (en) * | 2013-12-31 | 2014-03-26 | 大同煤矿集团有限责任公司 | Full coal roadway safe and speedy drivage supporting method |
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Application publication date: 20121114 |