CN103422871B - A kind of girders anchorage cable method for arranging of extra-large cross-section open-off cut Roof Control - Google Patents
A kind of girders anchorage cable method for arranging of extra-large cross-section open-off cut Roof Control Download PDFInfo
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- CN103422871B CN103422871B CN201310373080.0A CN201310373080A CN103422871B CN 103422871 B CN103422871 B CN 103422871B CN 201310373080 A CN201310373080 A CN 201310373080A CN 103422871 B CN103422871 B CN 103422871B
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Abstract
The invention discloses a kind of girders anchorage cable method for arranging of extra-large cross-section open-off cut Roof Control, comprise the step of carrying out as follows: the driving carrying out the first section tunnel, often tunnel the first distance on its top board, arrange that one ranked first anchor pole A1, and the first girders anchorage cable system B1 and the first monomer anchor cable C1 is arranged on driving limit, limit on its top board, make the first monomer anchor cable C1 between adjacent two first girders anchorage cable system B1; Carry out the driving of the second section tunnel, often driving to the first anchor pole correspondence position, its top board is arranged and one ranked second anchor pole A2; Often driving to the first girders anchorage cable system B1 correspondence position, its top board is arranged the second girders anchorage cable system B2; Often driving to the first monomer anchor cable C1 correspondence position, its top board is arranged second comonomer anchor cable C2, arranges the 3rd girders anchorage cable system B3 at the first section tunnel and the second section tunnel connectivity part.Effective, the safety support of section width scope at the open-off cut top board of 7 meters ~ 12 meters can be realized.
Description
Technical field
The present invention relates to laneway support method, particularly relate to a kind of girders anchorage cable method for arranging for extra-large cross-section open-off cut Roof Control.
Background technology
In coal mining, the normal span length produced generally is no more than 6 meters, and open-off cut is generally no more than 9m, takes the supporting measures such as general anchor pole-anchor cable-net or its combination to be effective.Along with coal in China exploits the increasing of scale, the device category that extraction technique progress uses is more and more advanced, and volume is increasing, and the section in tunnel is also increasing.Drift section is wider, and the impact by geostatic stress is larger, and be out of shape more obvious, the danger of collapsing is also higher, the increase of drift section, makes roadway support face huge difficulty, has had a strong impact on safety of coal mines High-efficient Production.
Summary of the invention
Object of the present invention is exactly to overcome above-mentioned prior art Problems existing, provides a kind of girders anchorage cable method for arranging of extra-large cross-section open-off cut Roof Control, can realize effective, the safety support of section width scope at the open-off cut top board of 9 meters ~ 12 meters.
For realizing above-mentioned purpose of the present invention, provide following technical scheme:
A kind of girders anchorage cable method for arranging of extra-large cross-section open-off cut Roof Control, comprise the step of carrying out as follows: the driving carrying out the first section tunnel, often tunnel the first distance on its top board, arrange that one ranked first anchor pole, and the first girders anchorage cable system and the first monomer anchor cable are arranged in driving limit, limit on its top board, make the first monomer anchor cable between adjacent two first girders anchorage cable systems; Carry out the driving of the second section tunnel, often driving to the first anchor pole correspondence position, its top board is arranged and one ranked second anchor pole; Often driving to the first girders anchorage cable system correspondence position, its top board is arranged the second girders anchorage cable system; Often driving to the first monomer anchor cable correspondence position, its top board is arranged second comonomer anchor cable, arranges the 3rd girders anchorage cable system at the first section tunnel and the second section tunnel connectivity part; Wherein, the width of the first section tunnel is greater than the second section tunnel, and the first section tunnel is communicated with the described extra-large cross-section open-off cut of formation with the second section tunnel.
Preferably, described first distance is d1, and the distance between adjacent described first girders anchorage cable system is d2,0.8m≤d1≤1.4m; 3.2m≤d2≤12m.
Preferably, described layout first girders anchorage cable system comprises the step of carrying out as follows: on the top board of described first section tunnel, throw the first girders anchorage cable into, make the first girders anchorage cable in vertical direction with β angle; The second girders anchorage cable thrown into by the top board of described first section tunnel, and make the second girders anchorage cable and the first girders anchorage cable transversely arrange and be positioned at same perpendicular, the second girders anchorage cable is in vertical direction with γ angle; Locker is adopted to be connected with the second girders anchorage cable by the first girders anchorage cable.
Preferably, arrange that the second girders anchorage cable system comprises the step of carrying out as follows: on the top board of described second section tunnel, throw the 3rd girders anchorage cable into, make the 3rd girders anchorage cable in vertical direction with β angle; The top board of described second section tunnel is thrown into the 4th girders anchorage cable, and make the 4th girders anchorage cable and the 3rd girders anchorage cable transversely arrange and be positioned at same perpendicular, the 4th girders anchorage cable is in vertical direction with γ angle; Locker is adopted to be connected with the 4th girders anchorage cable by the 3rd girders anchorage cable.
Preferably, 0≤β≤15 °, 0≤γ≤8 °.
Preferably, the first girders anchorage cable and described 3rd girders anchorage cable tilt towards lane, the both sides side of described open-off cut respectively, centroclinal respectively towards described open-off cut of described second girders anchorage cable and the 4th girders anchorage cable.
Preferably, the span between the second girders anchorage cable and the first girders anchorage cable is H1, and the span between the 4th girders anchorage cable and the 3rd girders anchorage cable is H1.
Preferably, arrange that the 3rd girders anchorage cable system comprises the step of carrying out as follows: on the top board of described first section tunnel, throw the 5th girders anchorage cable into; The top board of described second section tunnel is thrown into the 6th girders anchorage cable, make the 6th girders anchorage cable and the 5th girders anchorage cable lateral arrangement and be positioned at same perpendicular, the 5th girders anchorage cable and the 6th girders anchorage cable tilt towards lane, the both sides side of described open-off cut respectively; Locker is adopted to be connected with the 6th girders anchorage cable by the 5th girders anchorage cable.
Preferably, the 5th girders anchorage cable and the 6th girders anchorage cable respectively in vertical direction with α angle, 0≤α≤12 °.
Preferably, the span between the 6th girders anchorage cable and the 5th girders anchorage cable is H2,0≤H2-H1≤2m.
Beneficial effect of the present invention embodies in the following areas:
The present invention adopts secondary tunneling method to carry out the driving of extra-large cross-section open-off cut, and between adjacent two first girders anchorage cable systems or the second girders anchorage cable system, arrange the 3rd girders anchorage cable system at the second section tunnel and the first section tunnel connectivity part, to control the vertical load of extra-large cross-section open-off cut zone line top board, prevent the excessive roof destruction caused of central region tensile stress, Be very effective; And make two anchor cables in the first girders anchorage cable system and the second girders anchorage cable system respectively towards lane side and centroclinal, and be different angles from vertical direction, to meet the needs of zones of different anchoring, dependable performance.
Accompanying drawing explanation
Fig. 1 is the girders anchorage cable arrangement diagram of extra-large cross-section open-off cut Roof Control of the present invention;
Fig. 1 a is the tunneling process figure of the present invention first section tunnel;
Fig. 1 b is the tunneling process figure of the second section tunnel of the present invention;
Fig. 2 is the sectional view of extra-large cross-section open-off cut of the present invention.
Description of reference numerals: 1-first section tunnel; 2-second section tunnel; 10,20-anchor pole; 11-first girders anchorage cable; 12-second girders anchorage cable; 13-locker; 21-the 3rd girders anchorage cable; 22-the 4th girders anchorage cable; 23-locker; 31-the 5th girders anchorage cable; 32-the 6th girders anchorage cable; 33-locker; A1-first anchor pole; A2-second anchor pole; B1-first girders anchorage cable system; C1-first monomer anchor cable; B2-second girders anchorage cable system; B3-the 3rd girders anchorage cable system; C2-second comonomer anchor cable.
Detailed description of the invention
Fig. 1 is the girders anchorage cable arrangement diagram of extra-large cross-section open-off cut Roof Control of the present invention; Fig. 2 is the sectional view of extra-large cross-section open-off cut of the present invention; As shown in Figure 1, 2, the present invention adopts the method for secondary tunneling, driving forms extra-large cross-section open-off cut in two steps, first the first section tunnel 1 is tunneled, the supporting of its top board is carried out on driving limit, limit, then tunnels the second section tunnel 2, and the supporting of its top board is carried out on driving limit, limit, the width of the first section tunnel 1 is greater than the second section tunnel, and the first section tunnel 1 is communicated with formation extra-large cross-section open-off cut of the present invention with the second section tunnel 2.
Particularly, as shown in Figure 1, 2, the girders anchorage cable method for arranging of extra-large cross-section open-off cut Roof Control of the present invention comprises the step of carrying out as follows:
First, in Fig. 1 a, the direction of arrow tunnels the first section tunnel 1, often tunnel the first distance d1 on its top board, just arrange that one ranked first anchor pole A1, as shown in Figure 1a, often arrange anchor pole A1 and comprise the multiple anchor poles 10 arranged along the first section tunnel 1 horizontal (namely along the width of the first section tunnel), multiple anchor pole 10 is positioned at same perpendicular, and each anchor pole 10 is vertical with top board respectively, multiple anchor pole 10 is connected to form entirety by a reinforcing bar ladder, often row anchor pole A1 shown in Fig. 1 comprises 6 anchor poles 10, the number of anchor pole 10 can be arranged according to the width of the first section tunnel 1, wherein, 0.8m≤d1≤1.4m.And, the first girders anchorage cable system B1 and the first monomer anchor cable C1 is arranged on driving limit, limit on its top board, the distance between adjacent first girders anchorage cable system B1 is made to be d2, and each first girders anchorage cable system B1 is between adjacent two row's anchor pole A1, first monomer anchor cable C1 is between adjacent two first girders anchorage cable system B1, and the distance between the first monomer anchor cable C1 to an adjacent first girders anchorage cable system B1 is 1/2d2, wherein, 3.2m≤d2≤12m; First monomer anchor cable C1 perpendicular to top board, and is positioned at the plane along the first section tunnel horizontal expansion.Such as, as shown in Figure 1a, when the direction driving along arrow is to Z1 position, just first girders anchorage cable system B1 in the direction of the arrow in arrangement diagram 1a on its top board, then driving is continued, when tunneling to Z2 position, just on its top board, arrange row's anchor pole A1, continue driving afterwards again, when tunneling to Z3 position, its top board is arranged again row's anchor pole A1, continue driving afterwards, when tunneling to Z4 position, its top board is thrown into a first monomer anchor cable C1, continue driving afterwards again, in such a manner until whole first section tunnel driving is complete.
Wherein, the present invention arranges that the first girders anchorage cable system B1 comprises the step of carrying out as follows: on the top board of the first section tunnel, throw the first girders anchorage cable 11 into, as shown in Figure 2; Afterwards, the top board of the first section tunnel is thrown into the second girders anchorage cable 12, the second girders anchorage cable 12 and the first girders anchorage cable 11 is made transversely to arrange and be positioned at same perpendicular, and, first girders anchorage cable 11 and the second girders anchorage cable 12 tilt towards the both sides of the first section tunnel respectively, make the first girders anchorage cable 11 in vertical direction with β angle, so that the anchor point of the first girders anchorage cable 11 is positioned at rib and planar surveys, anchor point is stablized, second girders anchorage cable in vertical direction with γ angle, to control the vertical load of open-off cut central area; Wherein, 0≤β≤15 °, 0≤γ≤8 °; Span between second girders anchorage cable and the first girders anchorage cable is H1.Locker 13 is finally adopted to be connected with the second girders anchorage cable by first girders anchorage cable.Locker 13 of the present invention is prior art, is no longer described in detail the method that it connects the first girders anchorage cable and the second girders anchorage cable at this.
After first section tunnel driving, in Fig. 1 b, the direction of arrow is tunneled the second section tunnel 2, second section tunnel 2 and is communicated with the first section tunnel 1, forms extra-large cross-section open-off cut of the present invention.Second section tunnel driving method be: often driving to the first anchor pole A1 aligned position, just on its top board, arrange that one ranked second anchor pole A2, as shown in Figure 1 b, often arrange anchor pole A2 and comprise the multiple anchor poles 20 arranged along the second section tunnel 2 horizontal (namely along the width of the second section tunnel), multiple anchor pole 20 is positioned at same perpendicular, and each anchor pole 20 is vertical with top board respectively, multiple anchor pole 20 connects into entirety by a reinforcing bar ladder; Often row anchor pole A2 shown in Fig. 1 comprises 4 anchor poles 20, and the number of anchor pole 20 can be arranged according to the width of the second section tunnel 2; Often driving to the first girders anchorage cable system B1 aligned position, its top board is arranged the second girders anchorage cable system B2; Often driving to the first monomer anchor cable C1 aligned position, its top board is arranged second comonomer anchor cable C2, the 3rd girders anchorage cable system B3 is arranged at the first section tunnel 1 and the second section tunnel 2 connectivity part, make each second girders anchorage cable system B2 between adjacent two row's anchor pole A2, second comonomer anchor cable C2 is between adjacent two second girders anchorage cable system B2,3rd girders anchorage cable system B3 is between adjacent two second girders anchorage cable system B2, and, in the horizontal, the 3rd girders anchorage cable system B3 is between the first monomer anchor cable C1 and second comonomer anchor cable C2.Distance between second comonomer anchor cable C2 to an adjacent second girders anchorage cable system B2 is 1/2d2, wherein, and 3.2m≤d2≤12m; Second comonomer anchor cable C2 perpendicular to top board, and is positioned at the plane along the second section tunnel horizontal expansion.
Such as, as shown in Figure 1 b, when the direction driving along arrow is to Y1 position (in corresponding diagram 1b in the direction of the arrow last first girders anchorage cable system B1), just first the second girders anchorage cable system B2 in the direction of the arrow in arrangement diagram 1b on its top board, then driving is continued, when tunneling to Y2 position, just on its top board, arrange row's anchor pole A2, continue driving afterwards again, when tunneling to Y3 position, its top board is arranged again row's anchor pole A1, continue driving afterwards, when tunneling to Y4 position, its top board is thrown into a second comonomer anchor cable C2, and to arranging a 3rd girders anchorage cable system B3 between the first section tunnel of position and the second section tunnel, make the 3rd girders anchorage cable system B3 to should between the second comonomer anchor cable C2 of position and the first monomer anchor cable C1.Continue driving afterwards again, in such a manner until whole second section tunnel 2 tunnels complete.
Wherein, the present invention arranges that the second girders anchorage cable system B2 comprises the step of carrying out as follows: on the top board of the second section tunnel, throw the 3rd girders anchorage cable 21 into, afterwards, the top board of the second section tunnel is thrown into the 4th girders anchorage cable 22, the 4th girders anchorage cable 22 and the 3rd girders anchorage cable 21 is made transversely to arrange and be positioned at same perpendicular, and, 3rd girders anchorage cable 21 and the 4th girders anchorage cable 22 tilt towards the both sides of the second section tunnel respectively, as shown in Figure 2, make the 3rd girders anchorage cable 21 in vertical direction with β angle, so that the anchor point of the 3rd girders anchorage cable 21 is positioned at rib and planar surveys, anchor point is stablized, 4th girders anchorage cable is in vertical direction with γ angle, to control the vertical load of open-off cut central area, wherein, 0≤β≤15 °, 0≤γ≤8 °, span between 3rd girders anchorage cable and the 4th girders anchorage cable is H1.Locker 23 is finally adopted to be connected with the 4th girders anchorage cable by the 3rd girders anchorage cable.Locker 23 of the present invention is prior art, is no longer described in detail the method that it connects the first girders anchorage cable and the second girders anchorage cable at this.
The present invention arranges that the 3rd girders anchorage cable system B3 comprises the step of carrying out as follows: on the top board of the first section tunnel, throw the 5th girders anchorage cable 31 into; Afterwards, the top board of the second section tunnel is thrown into the 6th girders anchorage cable 32, make the 6th girders anchorage cable 32 and the 5th girders anchorage cable 31 lateral arrangement and be positioned at same perpendicular, the 5th girders anchorage cable 31 and the 6th girders anchorage cable 32 tilt towards lane, the both sides side of open-off cut respectively; As shown in Figure 2,5th girders anchorage cable and the 6th girders anchorage cable are respectively in vertical direction with α angle, 0≤α≤12 °, to control the vertical load of open-off cut zone line top board, prevent the excessive roof destruction caused of open-off cut central region tensile stress, span between 6th girders anchorage cable and the 5th girders anchorage cable is H2,0≤H2-H1≤2m.Locker 33 is finally adopted to be connected with the 6th girders anchorage cable by the 5th girders anchorage cable.As shown in Figure 1, the center of each locker 33 corresponding of the present invention he beat the center of Cross Section Open-off Cut.
Although above-mentioned to invention has been detailed description; but the present invention is not limited thereto; those skilled in the art can principle according to the present invention modify, and therefore, all various amendments carried out according to principle of the present invention all should be understood to fall into protection scope of the present invention.
Claims (7)
1. a girders anchorage cable method for arranging for extra-large cross-section open-off cut Roof Control, comprises the step of carrying out as follows:
Carry out the driving of the first section tunnel, often tunnel the first distance on its top board, arrange that one ranked first anchor pole A1, and the first girders anchorage cable system B1 and the first monomer anchor cable C1 is arranged on driving limit, limit on its top board, make the first monomer anchor cable C1 between adjacent two first girders anchorage cable system B1;
Carry out the driving of the second section tunnel, often driving to the first anchor pole correspondence position, its top board is arranged and one ranked second anchor pole A2; Often driving to the first girders anchorage cable system B1 correspondence position, its top board is arranged the second girders anchorage cable system B2; Often driving to the first monomer anchor cable C1 correspondence position, its top board is arranged second comonomer anchor cable C2, arranges the 3rd girders anchorage cable system B3 at the first section tunnel and the second section tunnel connectivity part;
Wherein, the width of the first section tunnel is greater than the second section tunnel, and the first section tunnel is communicated with the described extra-large cross-section open-off cut of formation with the second section tunnel;
Wherein, described layout first girders anchorage cable system B1 comprises the step of carrying out as follows:
The first girders anchorage cable thrown into by the top board of described first section tunnel, makes the first girders anchorage cable in vertical direction with β angle;
The second girders anchorage cable thrown into by the top board of described first section tunnel, and make the second girders anchorage cable and the first girders anchorage cable transversely arrange and be positioned at same perpendicular, the second girders anchorage cable is in vertical direction with γ angle;
Locker is adopted to be connected with the second girders anchorage cable by the first girders anchorage cable;
Wherein, described layout second girders anchorage cable system B2 comprises the step of carrying out as follows:
The top board of described second section tunnel is thrown into the 3rd girders anchorage cable, makes the 3rd girders anchorage cable in vertical direction with β angle;
The top board of described second section tunnel is thrown into the 4th girders anchorage cable, and make the 4th girders anchorage cable and the 3rd girders anchorage cable transversely arrange and be positioned at same perpendicular, the 4th girders anchorage cable is in vertical direction with γ angle;
Locker is adopted to be connected with the 4th girders anchorage cable by the 3rd girders anchorage cable;
Wherein, described first girders anchorage cable and described 3rd girders anchorage cable tilt towards lane, the both sides side of described open-off cut respectively, centroclinal respectively towards described open-off cut of described second girders anchorage cable and the 4th girders anchorage cable.
2. the method for claim 1, is characterized in that, described first distance is d1, and the distance between adjacent described first girders anchorage cable system B1 is d2,0.8m≤d1≤1.4m; 3.2m≤d2≤12m.
3. the method for claim 1, is characterized in that, 0≤β≤15 °, 0≤γ≤8 °.
4. the method for claim 1, is characterized in that, the span between described second girders anchorage cable and the first girders anchorage cable is H1, and the span between the 4th girders anchorage cable and the 3rd girders anchorage cable is H1.
5. the method for claim 1, is characterized in that, described layout the 3rd girders anchorage cable system comprises the step of carrying out as follows:
The top board of described first section tunnel is thrown into the 5th girders anchorage cable;
The top board of described second section tunnel is thrown into the 6th girders anchorage cable, make the 6th girders anchorage cable and the 5th girders anchorage cable lateral arrangement and be positioned at same perpendicular, the 5th girders anchorage cable and the 6th girders anchorage cable tilt towards lane, the both sides side of described open-off cut respectively;
Locker is adopted to be connected with the 6th girders anchorage cable by the 5th girders anchorage cable.
6. method as claimed in claim 5, is characterized in that, described 5th girders anchorage cable and the 6th girders anchorage cable respectively in vertical direction with α angle, 0≤α≤12 °.
7. method as claimed in claim 5, it is characterized in that, the span between the 6th girders anchorage cable and the 5th girders anchorage cable is H2,0≤H2-H1≤2m.
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| CN201310373080.0A CN103422871B (en) | 2013-08-23 | 2013-08-23 | A kind of girders anchorage cable method for arranging of extra-large cross-section open-off cut Roof Control |
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| CN201310373080.0A CN103422871B (en) | 2013-08-23 | 2013-08-23 | A kind of girders anchorage cable method for arranging of extra-large cross-section open-off cut Roof Control |
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Families Citing this family (3)
| Publication number | Priority date | Publication date | Assignee | Title |
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| CN104141503A (en) * | 2014-06-28 | 2014-11-12 | 四川省华蓥山煤业股份有限公司绿水洞煤矿 | Sharp inclination fully mechanized coal face open-off cut square supporting method |
| CN108518234A (en) * | 2018-03-27 | 2018-09-11 | 中国矿业大学(北京) | A kind of wrong title formula anchor cable method for arranging of extra-large cross-section open-off cut Roof Control |
| CN109488353A (en) * | 2018-10-23 | 2019-03-19 | 新汶矿业集团有限责任公司 | A kind of stope advance support system and method |
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