CN106401604A - Method for strengthening large coal pillar low in intensity of fracture development - Google Patents
Method for strengthening large coal pillar low in intensity of fracture development Download PDFInfo
- Publication number
- CN106401604A CN106401604A CN201611141709.9A CN201611141709A CN106401604A CN 106401604 A CN106401604 A CN 106401604A CN 201611141709 A CN201611141709 A CN 201611141709A CN 106401604 A CN106401604 A CN 106401604A
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- Prior art keywords
- coal column
- coal pillar
- big coal
- large coal
- intensity
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- 239000003245 coal Substances 0.000 title claims abstract description 75
- 238000000034 method Methods 0.000 title abstract description 8
- 238000005728 strengthening Methods 0.000 title abstract 7
- 206010017076 Fracture Diseases 0.000 title abstract 3
- 208000010392 Bone Fractures Diseases 0.000 title abstract 2
- 238000004080 punching Methods 0.000 claims abstract 2
- 230000002787 reinforcement Effects 0.000 claims description 19
- 230000003014 reinforcing effect Effects 0.000 claims description 13
- 238000007569 slipcasting Methods 0.000 claims description 5
- 230000008901 benefit Effects 0.000 abstract description 4
- 230000007774 longterm Effects 0.000 abstract description 3
- 238000005553 drilling Methods 0.000 abstract 1
- 238000005065 mining Methods 0.000 description 5
- 238000005516 engineering process Methods 0.000 description 2
- 239000011435 rock Substances 0.000 description 2
- 238000004026 adhesive bonding Methods 0.000 description 1
- 238000010009 beating Methods 0.000 description 1
- 230000000694 effects Effects 0.000 description 1
- 230000000630 rising effect Effects 0.000 description 1
- 239000002002 slurry Substances 0.000 description 1
- 239000002699 waste material Substances 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
-
- E—FIXED CONSTRUCTIONS
- E21—EARTH OR ROCK DRILLING; MINING
- E21C—MINING OR QUARRYING
- E21C41/00—Methods of underground or surface mining; Layouts therefor
- E21C41/16—Methods of underground mining; Layouts therefor
- E21C41/18—Methods of underground mining; Layouts therefor for brown or hard coal
-
- 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
- E21D11/04—Lining with building materials
- E21D11/10—Lining with building materials with concrete cast in situ; Shuttering also lost shutterings, e.g. made of blocks, of metal plates or other equipment adapted therefor
Landscapes
- Engineering & Computer Science (AREA)
- Mining & Mineral Resources (AREA)
- Life Sciences & Earth Sciences (AREA)
- General Life Sciences & Earth Sciences (AREA)
- Geochemistry & Mineralogy (AREA)
- Geology (AREA)
- Architecture (AREA)
- Structural Engineering (AREA)
- Civil Engineering (AREA)
- Remote Sensing (AREA)
- Piles And Underground Anchors (AREA)
Abstract
The invention relates to a method for strengthening a large coal pillar low in intensity of fracture development. The method comprises the following steps: respectively punching a large coal pillar every other a certain distance from an upper roadway to a lower roadway, arranging a grouting anchor rod, and grouting in fractures of the large coal pillar by virtue of the grouting anchor rod to form an upper large coal pillar strengthening end and a lower large coal pillar strengthening end; drilling a through hole in the large coal pillar from interior of the upper roadway or the lower roadway, then putting a connection stranded wire into the through hole, fixing by virtue of a lockset, connecting the upper and lower strengthening ends, and forming a connection clamping state at the middle part of the large coal pillar; and sequentially repeating the steps every other a certain distance along the trending direction of the large coal pillar. The large coal pillar strengthening method provided by the invention has the advantages that each part of the large coal pillar is locally strengthened, all the parts of the large coal pillar are organically combined, and finally overall strengthening is formed, so that long term stability of the large coal pillar is effectively guaranteed.
Description
Technical field
The present invention relates to a kind of big coal column reinforcement means of low-intensity cranny development.
Background technology
Strike long wall method has become as the widely used coal-mining method of coal mining enterprise at present.Move towards coal wall by walking
To propulsion, and across pitch is installed with the wide big coal column of 15m-30m.But with the advance of the face, overlying rock great force day
Benefit manifests, and big coal column progressively destroys under overlying rock effect, and thorough unstability, for coal mining safety very not
Profit, especially for the coal seam of low intensity, cranny development.
But at present, the treatment measures that coal mining enterprise is adopted substantially or are passed through to increase exploitation coal pillar width, make coal column width
Degree is more than 30m, even up to more than 40m, but such processing mode can produce huge waste to coal resources.
In sum, one kind is not still had in saving coal resources, and can effectively to stop big coal column from occurring in prior art
Unstable phenomenon it is ensured that coal mining safety method.
Content of the invention
For the unsolved technical problem of aforementioned prior art institute, the invention provides one kind is applied to low-intensity crack
Develop the reinforcement means of big coal column.
For solving above-mentioned technical problem, the technical solution used in the present invention is as follows：
A kind of big coal column reinforcement means of low-intensity cranny development, its step includes：
（a）Punch to big coal column from upper tunnel and lower channel spacing certain distance respectively, arrange grouted anchor bar, and pass through described note
Slurry anchor pole, to slip casting in the crack of described big coal column, forms big coal column upper and lower reinforcing termination；
（b）Get out through hole to described big coal column in described upper tunnel or described lower tunnel, then load to through hole and connect twisted wire,
And be fixed by lockset, described upper and lower reinforcing termination is connected, and connection clamping is formed to described big coal column middle part
State；
（c）Move towards direction along described big coal column, at a certain distance, be repeated in step（a）With（b）.
Step in the big coal column reinforcement means of above-mentioned low-intensity cranny development（a）In, neighbouring two described slip castings
Anchor spacing is 800mm, and two adjacent described grouted anchor bar spacing of left and right are 800mm.
Step in the big coal column reinforcement means of above-mentioned low-intensity cranny development（a）In, the length of described grouted anchor bar is
2200-2400mm, a diameter of 20-22mm.
Step in the big coal column reinforcement means of above-mentioned low-intensity cranny development（b）In, described through hole be located at described upper and lower plus
Fixed end head central area.
Step in the big coal column reinforcement means of above-mentioned low-intensity cranny development（b）In, described connection twisted wire（5）A diameter of
30-40mm.
Step in the big coal column reinforcement means of above-mentioned low-intensity cranny development（c）In, along described big coal column（3）The side of trend
To being repeated in step（a）With（b）, adjacent two described connection twisted wires（5）Distance be 6000mm.
The technique scheme of the present invention has advantages below compared to existing technology：
The low-intensity cranny development big coal column reinforcement means that the present invention provides, by beating to big coal column from upper tunnel and lower tunnel
Hole, arranges grouted anchor bar, and slip casting, termination coal body is attached, and has carried out gluing to crack, define intensity and substantially carry
The reinforcing termination rising, simultaneously for avoiding reinforcing termination generation rigid body movement, coal body internal with coal column separates in hence it is evident that reducing
Portion's coal mass strength, still cannot ensure that big bearing block long term is stable, be attached reinforcing termination also by connecting twisted wire, not only hinder
Stop the isolated movement reinforcing termination and internal coal body, and made internal coal body be in reinforcing termination for a long time and press from both sides with roof and floor three-dimensional
Hold state, therefore, the present invention can effectively lift the intensity of big coal column each several part, big bearing block long term is effectively ensured and is in and stablize
State.
Brief description
In order that present disclosure is more likely to be clearly understood, specific embodiment below according to the present invention simultaneously combines
Accompanying drawing, the present invention is further detailed explanation, wherein
Fig. 1 is low-intensity cranny development of the present invention big coal column reinforcement means arrangement diagrammatic top view；
Fig. 2 is the A-A of Fig. 1 to sectional view.
In figure is labeled as：The upper tunnel of 1-, tunnel under 2-, the big coal column of 3-, 4- grouted anchor bar, 5- connects twisted wire, 6- lockset.
Specific embodiment
For making the object, technical solutions and advantages of the present invention clearer, below in conjunction with accompanying drawing to embodiment party of the present invention
Formula is described in further detail.
As illustrated in fig. 1 and 2, be the big coal column reinforcement means of low-intensity cranny development of the present invention preferred embodiment.
The big coal column reinforcement means of described low-intensity cranny development, its step includes：
（a）Keep at a certain distance away from upper tunnel 1 and lower tunnel 2 respectively and punch to big coal column 3, arrange grouted anchor bar 4, neighbouring
Two described grouted anchor bar 4 spacing be 800mm, the length of described grouted anchor bar 4 is 2200-2400mm, a diameter of 20-
22mm, and by described grouted anchor bar 4 to slip casting in the crack of described big coal column 3, form big coal column upper and lower reinforcing termination；
（b）Get out through hole to described big coal column 3 in described upper tunnel 1 or described lower tunnel 2, described through hole be located at described upper,
Lower reinforcing termination central area, then loads to through hole and connects twisted wire 5, the described a diameter of 30-40mm connecting twisted wire 5, and leads to
Cross lockset 6 to be fixed, described upper and lower reinforcing termination is connected, and described big coal column middle part is formed with connection clamping shape
State；
（c）Move towards direction along described big coal column 3, at a certain distance, be repeated in step（a）With（b）.
In the present embodiment, move towards direction along described big coal column 3, be repeated in step（a）With（b）, described in adjacent two
The distance connecting twisted wire 5 is 6000mm.
Obviously, above-described embodiment is only intended to clearly illustrate example, and the not restriction to embodiment.Right
For those of ordinary skill in the art, can also make on the basis of the above description other multi-forms change or
Change.There is no need to be exhaustive to all of embodiment.And the obvious change thus extended out or
Change among still in protection scope of the present invention.
Claims (6)
1. a kind of big coal column reinforcement means of low-intensity cranny development it is characterised in that：Its step includes：
（a）Respectively from upper tunnel（1）With lower tunnel（2）Keep at a certain distance away to big coal column（3）Punching, arranges grouted anchor bar（4）,
And pass through described grouted anchor bar（4）To described big coal column（3）Crack in slip casting, formed big coal column upper and lower reinforcing termination；
（b）From described upper tunnel（1）Or described lower tunnel（2）Introversive described big coal column（3）Get out through hole, then load to through hole
Connect twisted wire（5）, and pass through lockset（6）Be fixed, described upper and lower reinforcing termination connected, and to described big coal column in the middle of
Position forms and connects clamp position；
（c）Along described big coal column（3）Move towards direction, at a certain distance, be repeated in step（a）With（b）.
2. the big coal column reinforcement means of low-intensity cranny development according to claim 1 it is characterised in that：In step（a）In,
Two neighbouring described grouted anchor bar spacing are 800mm, and two adjacent described grouted anchor bar spacing of left and right are 800mm.
3. the big coal column reinforcement means of low-intensity cranny development according to claim 2 it is characterised in that：In step（a）In,
The length of described grouted anchor bar is 2200-2400mm, a diameter of 20-22mm.
4. according to the arbitrary described low-intensity cranny development big coal column reinforcement means of claim 1-3 it is characterised in that：In step
（b）In, described through hole is located at described upper and lower reinforcing termination central area.
5. the big coal column reinforcement means of low-intensity cranny development according to claim 4 it is characterised in that：In step（b）In,
Described connection twisted wire（5）A diameter of 30-40mm.
6. the big coal column reinforcement means of low-intensity cranny development according to claim 5 it is characterised in that：In step（c）In,
Along described big coal column（3）Move towards direction, be repeated in step（a）With（b）, adjacent two described connection twisted wires（5）Distance be
6000mm.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201611141709.9A CN106401604A (en) | 2016-12-12 | 2016-12-12 | Method for strengthening large coal pillar low in intensity of fracture development |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201611141709.9A CN106401604A (en) | 2016-12-12 | 2016-12-12 | Method for strengthening large coal pillar low in intensity of fracture development |
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| Publication Number | Publication Date |
|---|---|
| CN106401604A true CN106401604A (en) | 2017-02-15 |
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201611141709.9A Pending CN106401604A (en) | 2016-12-12 | 2016-12-12 | Method for strengthening large coal pillar low in intensity of fracture development |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN110410100A (en) * | 2019-07-13 | 2019-11-05 | 新疆大学 | The method that prestressed fiber cloth reinforced Room and Pillar Working Face leaves coal column |
Citations (8)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPH0823261B2 (en) * | 1991-05-28 | 1996-03-06 | 住友建設株式会社 | Parallel tunnel construction method |
| CN102296976A (en) * | 2011-09-02 | 2011-12-28 | 安徽理工大学 | Asymmetrical bolt-net-cable combined supporting method for special-shaped recovery tunnel of large inclination angle coal bed |
| CN102425439A (en) * | 2012-01-17 | 2012-04-25 | 中国矿业大学 | Method for reinforcing bidirectional staged stretched anchor cable of preset steel strand |
| CN103742171A (en) * | 2013-12-27 | 2014-04-23 | 中国矿业大学(北京) | Mining roadway coal pillar reinforcing method |
| CN104847354A (en) * | 2015-04-03 | 2015-08-19 | 山东科技大学 | Method for improving performance of strip coal pillar by grouting combined support anchor rod |
| CN205189893U (en) * | 2015-11-19 | 2016-04-27 | 中国矿业大学(北京) | Be used for a lane coal column to wearing reinforced (rfd) supporting construction |
| CN205370610U (en) * | 2016-02-15 | 2016-07-06 | 山东科技大学 | Reinforcing apparatus of narrow coal column between tunnel |
| CN106050282A (en) * | 2016-07-08 | 2016-10-26 | 西安科技大学 | Anchoring structure and reinforcing method of narrow coal pillar of gob-side entry retaining |
-
2016
- 2016-12-12 CN CN201611141709.9A patent/CN106401604A/en active Pending
Patent Citations (8)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPH0823261B2 (en) * | 1991-05-28 | 1996-03-06 | 住友建設株式会社 | Parallel tunnel construction method |
| CN102296976A (en) * | 2011-09-02 | 2011-12-28 | 安徽理工大学 | Asymmetrical bolt-net-cable combined supporting method for special-shaped recovery tunnel of large inclination angle coal bed |
| CN102425439A (en) * | 2012-01-17 | 2012-04-25 | 中国矿业大学 | Method for reinforcing bidirectional staged stretched anchor cable of preset steel strand |
| CN103742171A (en) * | 2013-12-27 | 2014-04-23 | 中国矿业大学(北京) | Mining roadway coal pillar reinforcing method |
| CN104847354A (en) * | 2015-04-03 | 2015-08-19 | 山东科技大学 | Method for improving performance of strip coal pillar by grouting combined support anchor rod |
| CN205189893U (en) * | 2015-11-19 | 2016-04-27 | 中国矿业大学(北京) | Be used for a lane coal column to wearing reinforced (rfd) supporting construction |
| CN205370610U (en) * | 2016-02-15 | 2016-07-06 | 山东科技大学 | Reinforcing apparatus of narrow coal column between tunnel |
| CN106050282A (en) * | 2016-07-08 | 2016-10-26 | 西安科技大学 | Anchoring structure and reinforcing method of narrow coal pillar of gob-side entry retaining |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN110410100A (en) * | 2019-07-13 | 2019-11-05 | 新疆大学 | The method that prestressed fiber cloth reinforced Room and Pillar Working Face leaves coal column |
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Application publication date: 20170215 |
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