CN108104833B - A kind of underworkings Bolting Parameters design method based on Central Point Method - Google Patents
A kind of underworkings Bolting Parameters design method based on Central Point Method Download PDFInfo
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- CN108104833B CN108104833B CN201711395141.8A CN201711395141A CN108104833B CN 108104833 B CN108104833 B CN 108104833B CN 201711395141 A CN201711395141 A CN 201711395141A CN 108104833 B CN108104833 B CN 108104833B
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- anchor pole
- central point
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- array pitch
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- 238000000034 method Methods 0.000 title claims abstract description 32
- 238000013461 design Methods 0.000 title claims abstract description 31
- 239000000725 suspension Substances 0.000 claims abstract description 10
- 230000015572 biosynthetic process Effects 0.000 claims description 7
- 239000011435 rock Substances 0.000 claims description 5
- 239000002699 waste material Substances 0.000 abstract description 6
- 238000004519 manufacturing process Methods 0.000 abstract description 2
- 238000005065 mining Methods 0.000 abstract description 2
- 238000010276 construction Methods 0.000 description 2
- 238000005516 engineering process Methods 0.000 description 2
- 238000012986 modification Methods 0.000 description 2
- 230000004048 modification Effects 0.000 description 2
- 201000004569 Blindness Diseases 0.000 description 1
- 238000004364 calculation method Methods 0.000 description 1
- 238000011161 development Methods 0.000 description 1
- 231100001261 hazardous Toxicity 0.000 description 1
- 230000003993 interaction Effects 0.000 description 1
- 239000000463 material Substances 0.000 description 1
- 238000005259 measurement Methods 0.000 description 1
- 238000011160 research Methods 0.000 description 1
Classifications
-
- E—FIXED CONSTRUCTIONS
- E21—EARTH OR ROCK DRILLING; MINING
- E21D—SHAFTS; TUNNELS; GALLERIES; LARGE UNDERGROUND CHAMBERS
- E21D11/00—Lining tunnels, galleries or other underground cavities, e.g. large underground chambers; Linings therefor; Making such linings in situ, e.g. by assembling
- E21D11/006—Lining anchored in the rock
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- Engineering & Computer Science (AREA)
- Mining & Mineral Resources (AREA)
- Architecture (AREA)
- Civil Engineering (AREA)
- Structural Engineering (AREA)
- Life Sciences & Earth Sciences (AREA)
- General Life Sciences & Earth Sciences (AREA)
- Geochemistry & Mineralogy (AREA)
- Geology (AREA)
- Road Signs Or Road Markings (AREA)
- Foundations (AREA)
Abstract
The underworkings Bolting Parameters design method based on Central Point Method that the invention discloses a kind of, including array pitch between anchor pole 1) is both configured to same value, i.e. spacing and array pitch is a；The anchor force of anchor poleThe loose layer weight Q of anchor pole suspention2=γ * H*a2；Suspension roof support power function equation G (H, a)=Q1‑Q2, limit state equation be G (H, a)=0；2)；2) it is calculated by Central Point Method, reliability indexIt obtainsThe design method is in terms of reliability theory, the reliability foundation for providing roadway support, realizes the careful design of accurate Bolting Parameters, has both been avoided that the unnecessary waste of traditional design, the safety of underworkings supporting can also be improved, the production cost of mining enterprise is reduced.
Description
Technical field
The underworkings Bolting Parameters design method based on Central Point Method that the present invention relates to a kind of.
Background technique
Bolt support technology appearance is for quite some time, and has been widely used in underworkings supporting skill
In art.Theory and technology in relation to Design of bolt support has considerable research, but Design of bolt support is all concentrated on
The interaction of anchor pole country rock, anchor pole material etc., are studied in terms of the reliability of few pairs of suspension roof supports.
And traditional design handbook formulaOnly one safety coefficient in the calculation method has very big
Blindness.
Therefore the present invention starts with from the reliability of suspension roof support, proposes a kind of underworkings anchor pole branch based on Central Point Method
Parameters design is protected, changes existing design method, by the objective situation of change of the actual unconsolidated formation in underground and actual construction
Troop's factors such as existing inevitable errors when installing suspension roof support take into account comprehensively, in terms of reliability theory, provide lane
The reliability foundation of road supporting both can guarantee the reliable of roadway bolting support to realize the careful design of Bolting Parameters
Property, and it is avoided that the unnecessary waste of traditional design.The safety of underworkings supporting is improved, the life of mining enterprise is reduced
Produce cost.
Summary of the invention
The underworkings Bolting Parameters design method based on Central Point Method that the purpose of the present invention is to provide a kind of, with
Solve the problems mentioned above in the background art.
To achieve the above object, the invention provides the following technical scheme: a kind of underworkings anchor pole based on Central Point Method
Supporting parameter design method, comprising the following steps:
1) array pitch between anchor pole is both configured to same value, i.e. spacing and array pitch is a；
The anchor force of anchor pole
The loose layer weight Q of anchor pole suspention2=γ * H*a2
Suspension roof support power function equation G (H, a)=Q1-Q2
Limit state equation be G (H, a)=0,
Wherein, σtAnchor pole tensile strength, MPa；
D- bolt diameter, mm；
The loose layer height of H-, m；
Array pitch, m between a- anchor pole；
γ-rock stratum force density, Kn/m2；
σHThe standard deviation of unconsolidated formation H, m；
σaThe standard deviation of bolt interval a, m；
2) it is calculated by Central Point Method, reliability index
It arranges, obtains
It enables
It can solve
It will by positive and negative checking computationsCast out；
With traditional design handbook formulaIt compares, the present invention is the underworkings anchor pole branch based on Central Point Method
Shield Parameters design provides the reliability foundation of roadway support, realizes accurate Bolting Parameters in terms of reliability theory
Careful design, be both avoided that the unnecessary waste of traditional design, moreover it is possible to improve the safety of underworkings supporting, reduce mine
The production cost of exploitation enterprise.
Detailed description of the invention
Fig. 1 is that front view is installed in underworkings suspension roof support of the present invention；
Fig. 2 is that top view is installed in underworkings suspension roof support of the present invention.
Specific embodiment
Following will be combined with the drawings in the embodiments of the present invention, and technical solution in the embodiment of the present invention carries out clear, complete
Site preparation description, it is clear that described embodiments are only a part of the embodiments of the present invention, instead of all the embodiments.It is based on
Embodiment in the present invention, it is obtained by those of ordinary skill in the art without making creative efforts every other
Embodiment shall fall within the protection scope of the present invention.
The present invention is a kind of underworkings Bolting Parameters design method based on Central Point Method, packet referring to FIG. 1-2,
Include following steps:
1) most important design parameter is exactly array pitch between anchor pole in Design of bolt support, and array pitch between anchor pole is all set
It is set to same value, both spacing and array pitch were a；
The anchor force of anchor pole
The loose layer weight Q of anchor pole suspention2=γ * H*a2
Suspension roof support power function equation G (H, a)=Q1-Q2
Limit state equation be G (H, a)=0,
Wherein, σtAnchor pole tensile strength, MPa；
D- bolt diameter, mm；
The loose layer height of H-, m；
Array pitch, m between a- anchor pole；
γ-rock stratum force density, Kn/m2；
σHThe standard deviation of unconsolidated formation H, m；
σaThe standard deviation of bolt interval a, m.
2) it is calculated by Central Point Method, reliability index
It arranges, obtains
It enables
It can solve
It will by positive and negative checking computationsCast out；
The design method is compared using case-study below:
As follows, the anchor pole tensile strength sigma according to the actual measurement value of certain mine underworkingst=200MPa, bolt diameter d=
20mm；Loose layer height, H=0.5m；Rock stratum force density γ=30KN/m2；The standard deviation sigma of unconsolidated formation HH=0.26m；Anchor pole
Between array pitch a standard deviation sigmaa=0.2m.
Reliability β takes 1.3, corresponding stable structure Probability pr=90.32%, general underground development heading is come
It says, reliability with higher.
1 roadway support parameter list of table
2 reliability index β of table and stable structure Probability prRelationship
It is calculated by this method:
A=-122.1804
B=1945.795592
C=-3947.84176
It solves
A=1.544845446
After rounding, a=1.5m.
Compare former design method
K- safety coefficient, value range 1.5-2
K=1.5 is taken according to above formula, is calculated
α=1.671085516,
A=1.6m after rounding
Corresponding reliability β=1.102727705, stable structure Probability pr=86.49%, already less than 90%, in this way
Reliability be that should not be used than relatively hazardous.
K=2.0 is taken again, is calculated
A=1.447202509,
A=1.4m after rounding
Corresponding reliability β=1.916556579, stable structure Probability pr=97.24%, already close to 100%, in this way
Reliability far super actual demands of engineering, will cause unnecessary waste, should not also use.
In the actual mine working Design of bolt support, if only method takes safety coefficient k by rule of thumb, it is difficult to ensure that taking
One to k not only can guarantee reliability with higher, but also be avoided that excessively high reliability bring waste.
So can effectively avoid above-mentioned ask using the underworkings Bolting Parameters design method based on Central Point Method
Topic；Meanwhile the design method takes into account σ simultaneouslyHThe standard deviation and σ of unconsolidated formation HaStandard deviation two changes of bolt interval a
Amount, is exactly unlikely to be a definite value for the actual unconsolidated formation in underground, and there are the objective realities of certain variation, it is also contemplated that real
The construction team on border existing inevitable errors, this subjective impact when installing suspension roof support.To realize Bolting Parameters
Careful design, not only can guarantee the reliability of roadway bolting support, but also be avoided that the unnecessary waste of traditional design.
It although an embodiment of the present invention has been shown and described, for the ordinary skill in the art, can be with
A variety of variations, modification, replacement can be carried out to these embodiments without departing from the principles and spirit of the present invention by understanding
And modification, the scope of the present invention is defined by the appended.
Claims (1)
1. a kind of underworkings Bolting Parameters design method based on Central Point Method, which comprises the following steps:
1) array pitch between anchor pole is both configured to same value, i.e. spacing and array pitch is a；
The anchor force of anchor pole
The loose layer weight Q of anchor pole suspention2=γ * H*a2
Suspension roof support power function equation G (H, a)=Q1-Q2
Limit state equation be G (H, a)=0,
σtAnchor pole tensile strength, MPa；
D- bolt diameter, mm；
The loose layer height of H-, m；
Array pitch, m between a- anchor pole；
γ-rock stratum force density, Kn/m2；
σHThe standard deviation of unconsolidated formation H, m；
σaThe standard deviation of bolt interval a, m；
2) it is calculated by Central Point Method, reliability index
It arranges, obtains
It enables
It can solve
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| Application Number | Priority Date | Filing Date | Title |
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| Application Number | Priority Date | Filing Date | Title |
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| CN201711395141.8A CN108104833B (en) | 2017-12-21 | 2017-12-21 | A kind of underworkings Bolting Parameters design method based on Central Point Method |
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| CN108104833A CN108104833A (en) | 2018-06-01 |
| CN108104833B true CN108104833B (en) | 2019-05-24 |
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Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102392658A (en) * | 2011-09-23 | 2012-03-28 | 中南大学 | Quantification design method for preliminary bracing parameters of unsymmetrical loading tunnel |
| CN103195453A (en) * | 2013-04-16 | 2013-07-10 | 中国矿业大学 | Parameter determination method for bolt supporting based on roadway bearing structure |
| CN106201993A (en) * | 2016-05-30 | 2016-12-07 | 贵州大学 | Compound roof suspension roof support angle determination method |
| CN106885705A (en) * | 2017-04-11 | 2017-06-23 | 山东科技大学 | A kind of alley way anchor rete cord system supporting effect evaluation method |
| CN107133381A (en) * | 2017-04-01 | 2017-09-05 | 中国矿业大学 | A kind of length determining method of roadway support anchor pole |
-
2017
- 2017-12-21 CN CN201711395141.8A patent/CN108104833B/en not_active Expired - Fee Related
Patent Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102392658A (en) * | 2011-09-23 | 2012-03-28 | 中南大学 | Quantification design method for preliminary bracing parameters of unsymmetrical loading tunnel |
| CN103195453A (en) * | 2013-04-16 | 2013-07-10 | 中国矿业大学 | Parameter determination method for bolt supporting based on roadway bearing structure |
| CN106201993A (en) * | 2016-05-30 | 2016-12-07 | 贵州大学 | Compound roof suspension roof support angle determination method |
| CN107133381A (en) * | 2017-04-01 | 2017-09-05 | 中国矿业大学 | A kind of length determining method of roadway support anchor pole |
| CN106885705A (en) * | 2017-04-11 | 2017-06-23 | 山东科技大学 | A kind of alley way anchor rete cord system supporting effect evaluation method |
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| CN108104833A (en) | 2018-06-01 |
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