CN102352761A - Prestressed fish-bellied steel cable combined supporting structure for coal mine laneway - Google Patents
Prestressed fish-bellied steel cable combined supporting structure for coal mine laneway Download PDFInfo
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- CN102352761A CN102352761A CN2011103539458A CN201110353945A CN102352761A CN 102352761 A CN102352761 A CN 102352761A CN 2011103539458 A CN2011103539458 A CN 2011103539458A CN 201110353945 A CN201110353945 A CN 201110353945A CN 102352761 A CN102352761 A CN 102352761A
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Abstract
The invention discloses a prestressed fish-bellied steel cable combined supporting structure for a coal mine laneway. The prestressed fish-bellied steel cable combined supporting structure comprises a plurality of support beams, wherein an arc-shaped truss is fixedly arranged at the lower part of each support beam, each of the two ends of every support is provided with a prestress applying device, and a prestressed anchor cable and a prestressed steel cable are respectively connected with the prestress applying devices of each support; and the prestressed steel cables bypass the lower bottom surfaces of the arc-shaped trusses and the two ends of each prestress steel cable are fixed on the corresponding prestress applying device. According to the invention, force generated by the prestressed steel cables acts on steel beams by virtue of the trusses, thereby further generating an upward counterforce at the bottom parts of the steel beams to effectively support a broken roof of a coal mine; and the structure is in a fish-bellied type integrally. The prestressed fish-bellied steel cable combined supporting structure has the advantages of light weight, easiness in construction, high carrying capacity and the like, and can meet the supporting idea of firstly resisting, then yielding and further resisting of a supporting member. The prestressed fish-bellied steel cable combined supporting structure can be processed out of a construction field and then transported to the construction field, thereby saving time and saving labor; simultaneously, the prestressed fish-belied structure is adopted so as to supply sufficient support counterforce against the roof of the laneway.
Description
Technical field
The present invention relates to a kind of colliery tunnel support device, especially a kind of coal mine roadway prestressing force fish belly cable wire combined support structure.
Background technology
At present, the roof timbering in the existing coal mine roadway generally adopts the support pattern of " girder steel+anchor pole or anchor cable ", promptly plays anchor pole, anchor cable at the top board top, and anchor shaft anchor cable is fixed on the girder steel.But because rock-bolt length is not enough, and the thickness in the broken coal seam in the tunnel is often very big, so the anchor pole end is difficult to be anchored in the competent bed in actual tunnel, thereby causes the not enough phenomenon of the supporting intensity of top board, has potential safety hazard; In the construction,, cause it can not bring into play due effect at the scene because the inexactness of existing equipment is difficult to anchor pole (rope) is applied enough prestressing force; In addition, in girder steel, need to install a plurality of anchor poles, make that with regard to the quantity that has increased boring labour intensity is high, efficiency of construction is low like this.Therefore traditional support pattern all can produce bad influence and certain potential safety hazard is arranged on construction speed and construction effect.
Summary of the invention
The objective of the invention is for overcoming the deficiency of above-mentioned prior art, provide a kind of high efficiency, time saving and energy saving, supporting effect good, safe and reliable coal mine roadway prestressing force fish belly cable wire combined support structure.
For realizing above-mentioned purpose, the present invention adopts following technical proposals:
A kind of coal mine roadway prestressing force fish belly cable wire combined support structure; Comprise some strutbeams; Said each strutbeam bottom all is fixed with a belfast truss, and each support two ends is equipped with the prestressing force bringing device, is connected with prestress anchorage cable and prestressed cable on the prestressing force bringing device respectively; Said prestressed cable is walked around the belfast truss bottom surface, and its two ends are fixed on the prestressing force bringing device.
Said strutbeam is a girder steel, and said girder steel is provided with the anchor cable installing hole.
Said belfast truss is fixedly welded on the strutbeam, and belfast truss is del for being welded into by some indented barss, and the bottom of belfast truss is welded with the groove that supplies prestressed cable to pass.
Said prestressing force bringing device is the del structure, is respectively arranged with prestress anchorage cable and prestressed cable end tie point on it, and the tie point place is provided with prestress anchorage cable and links to each other with prestressed cable and can apply prestressed motor.
Said prestress anchorage cable and prestressed cable all adopt high strength steel strand.
The present invention includes girder steel, truss, prestress anchorage cable and prestressed cable and prestressing force bringing device; The two ends of girder steel are equipped with and are applied prestressed prestressing force bringing device; Be used for that prestress anchorage cable and prestressed cable are prestressed to be applied and fix; Truss is weldingly fixed on the girder steel; Through the prestressing force bringing device bottom cable wire is applied prestressing force; Through truss it is delivered on the girder steel, realizes effective support breaking roof.At the bottom of each truss welding groove, prestress wire is connected with truss through groove, and girder steel is fixed on back through prestress anchorage cable, and the girder steel section configuration is mining shaped steel, and invention integral body presents " fish belly type " structure.
Owing to adopt technique scheme, compared with prior art, the present invention have high efficiency, time saving and energy saving, constructing operation convenient, safe and reliable, advantage that supporting intensity is high, has embodied the thought of " anti-relief resists again earlier " simultaneously.Anti-earlier: as the fish belly sill structure to be applied certain prestressing force, embodied anti-thought, prevent top board lower floor, offset a part of top board vertical stress.Relief: in the process of crushing, fish belly sill allows pressure, and cable wire is tightened.Anti-again: as to allow the prestressing force of cable wire increases in the process of pressing, increased support force again, thereby embodied anti-again thought to top board.
Owing to, on top board, just needn't bore more hole without skyhook, realized the effective support of large span section, so just saved a lot of man-hours.In addition, the installation process of girder steel, truss and prestress wire can be placed on ground carries out, and so just makes and the easy to operate operating efficiency that improved has reduced labour intensity.The present invention in supporting at first through the prestressing force long anchor cable with structure anchor in hard rock (coal) layer; Simultaneously owing to applied prestressing force at prestress wire; Can produce support force upwards to truss; Thereby top board has been carried out the prestressing force supporting; The sedimentation and deformation that can effectively suppress top board has so just solved the not high hidden danger of roof bolting intensity in the prior art.In addition, the whole fish belly type structure that adopts of the present invention has improved the support action to top board greatly.In addition, the present invention has given full play to the flexible support thought in the roadway support, and prestress anchorage cable and prestress wire all belong to active support, make supporting and country rock carry jointly, give full play to the intensity of country rock itself.
Description of drawings
Fig. 1 is assembled into a structural representation when whole for the present invention;
Fig. 2 is that the A of accompanying drawing 1 is to sketch map;
Fig. 3 is a prestressing force bringing device part enlarged diagram among Fig. 2;
Fig. 4 is a belfast truss part enlarged diagram among Fig. 2;
Fig. 5 is the structural representation of belfast truss bottom groove;
Wherein 1. prestress anchorage cables, 2. strutbeam, 3. truss, 4. prestressed cable, 5. prestressing force bringing device.
The specific embodiment
Below in conjunction with accompanying drawing and embodiment the present invention is further specified.
Among Fig. 1-Fig. 5, the girder steel of strutbeam 2 for processing by I16 shaped steel.Anchor lock installing hole is arranged on the girder steel, make perforating, install very convenient.Prestress anchorage cable 1 adopts 7 strands of high strength steel strands commonly used at present with prestressed cable 4 materials, and the groove of belfast truss 3 bottoms should be chosen according to the steel strand specification, guarantees that groove and steel strand have good matching relationship.Integral body of the present invention presents " fish belly type " structure.
During use, at first assemble truss 3, truss is selected the indented bars of Φ 20 for use; Be welded on then on the strutbeam 2, and at truss bottom welding groove; On steel band, bore 4 bolts hole, prestressed cable 4 is passed groove, apply prestressing force and be fixed on the strutbeam 2 with prestressing force bringing device 5, prestressed big I is decided according to the country rock situation, generally is controlled at 50～100KN; The structure that assembles is transported to the supporting scene; Making prestressed anchor lock 1 to top board then is fixed on girder steel 2 on the top board simultaneously; The prestressed big I of anchor cable is decided according to the country rock situation, generally is controlled at 50～100KN, and the length of anchor cable should guarantee that anchorage cable anchoring is in hard rock (coal) layer.
Claims (5)
1. coal mine roadway prestressing force fish belly cable wire combined support structure; It is characterized in that; Comprise some strutbeams; Said each strutbeam bottom all is fixed with a belfast truss; Each support two ends is equipped with the prestressing force bringing device, is connected with prestress anchorage cable and prestressed cable on the prestressing force bringing device respectively; Said prestressed cable is walked around the belfast truss bottom surface, and its two ends are fixed on the prestressing force bringing device.
2. coal mine roadway prestressing force fish belly cable wire combined support structure as claimed in claim 1 is characterized in that said strutbeam is a girder steel, and said girder steel is provided with the anchor cable installing hole.
3. coal mine roadway prestressing force fish belly cable wire combined support structure as claimed in claim 1; It is characterized in that; Said belfast truss is fixedly welded on the strutbeam, and belfast truss is del for being welded into by some indented barss, and the bottom of belfast truss is welded with the groove that supplies prestressed cable to pass.
4. coal mine roadway prestressing force fish belly cable wire combined support structure as claimed in claim 1; It is characterized in that; Said prestressing force bringing device is the del structure; Be respectively arranged with prestress anchorage cable and prestressed cable end tie point on it, the tie point place is provided with prestress anchorage cable and links to each other with prestressed cable and can apply prestressed motor.
5. coal mine roadway prestressing force fish belly cable wire combined support structure as claimed in claim 1 is characterized in that said prestress anchorage cable and prestressed cable all adopt high strength steel strand.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2011103539458A CN102352761A (en) | 2011-11-09 | 2011-11-09 | Prestressed fish-bellied steel cable combined supporting structure for coal mine laneway |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2011103539458A CN102352761A (en) | 2011-11-09 | 2011-11-09 | Prestressed fish-bellied steel cable combined supporting structure for coal mine laneway |
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| CN102352761A true CN102352761A (en) | 2012-02-15 |
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| Application Number | Title | Priority Date | Filing Date |
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| CN2011103539458A Pending CN102352761A (en) | 2011-11-09 | 2011-11-09 | Prestressed fish-bellied steel cable combined supporting structure for coal mine laneway |
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Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN2179462Y (en) * | 1993-12-25 | 1994-10-12 | 中国矿业大学 | Anchor-drawing support |
| CN1306150A (en) * | 2000-06-11 | 2001-08-01 | 郭兰波 | Reinforcing bar netted chock and netted-shell bolting and shotcrete support |
| US20050201837A1 (en) * | 2004-02-27 | 2005-09-15 | Jennmar Corporation | Truss shoe |
| CN2916133Y (en) * | 2006-04-12 | 2007-06-27 | 永城煤电(集团)有限责任公司 | H-shape girder steel with reinforcement device |
| CN202300444U (en) * | 2011-11-09 | 2012-07-04 | 山东大学 | Pre-stressed fish-bellied steel cable combined supporting structure of coal mine roadway |
-
2011
- 2011-11-09 CN CN2011103539458A patent/CN102352761A/en active Pending
Patent Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN2179462Y (en) * | 1993-12-25 | 1994-10-12 | 中国矿业大学 | Anchor-drawing support |
| CN1306150A (en) * | 2000-06-11 | 2001-08-01 | 郭兰波 | Reinforcing bar netted chock and netted-shell bolting and shotcrete support |
| US20050201837A1 (en) * | 2004-02-27 | 2005-09-15 | Jennmar Corporation | Truss shoe |
| CN2916133Y (en) * | 2006-04-12 | 2007-06-27 | 永城煤电(集团)有限责任公司 | H-shape girder steel with reinforcement device |
| CN202300444U (en) * | 2011-11-09 | 2012-07-04 | 山东大学 | Pre-stressed fish-bellied steel cable combined supporting structure of coal mine roadway |
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Application publication date: 20120215 |