CN110219685B - Roof reinforcing grouting equipment and grouting method - Google Patents
Roof reinforcing grouting equipment and grouting method Download PDFInfo
- Publication number
- CN110219685B CN110219685B CN201910607698.6A CN201910607698A CN110219685B CN 110219685 B CN110219685 B CN 110219685B CN 201910607698 A CN201910607698 A CN 201910607698A CN 110219685 B CN110219685 B CN 110219685B
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- China
- Prior art keywords
- grouting
- outer sleeve
- sleeve
- air bag
- hole
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- Expired - Fee Related
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- 230000003014 reinforcing effect Effects 0.000 title claims abstract description 19
- 238000000034 method Methods 0.000 title claims abstract description 14
- 239000004744 fabric Substances 0.000 claims abstract description 13
- 230000000903 blocking effect Effects 0.000 claims abstract description 11
- 238000009423 ventilation Methods 0.000 claims abstract description 11
- 229910000831 Steel Inorganic materials 0.000 claims abstract description 6
- 239000010959 steel Substances 0.000 claims abstract description 6
- 239000002002 slurry Substances 0.000 claims description 25
- 238000004873 anchoring Methods 0.000 claims description 15
- 239000011435 rock Substances 0.000 claims description 9
- 238000007599 discharging Methods 0.000 claims description 8
- 239000011440 grout Substances 0.000 claims description 7
- 238000005553 drilling Methods 0.000 claims description 4
- 238000005086 pumping Methods 0.000 claims description 3
- 230000002787 reinforcement Effects 0.000 claims description 3
- 210000004712 air sac Anatomy 0.000 claims description 2
- 238000007569 slipcasting Methods 0.000 claims 1
- 230000004888 barrier function Effects 0.000 description 2
- 230000009286 beneficial effect Effects 0.000 description 1
- 239000003245 coal Substances 0.000 description 1
- 239000010883 coal ash Substances 0.000 description 1
- 238000010276 construction Methods 0.000 description 1
- 238000007796 conventional method Methods 0.000 description 1
- 239000000463 material Substances 0.000 description 1
Images
Classifications
-
- E—FIXED CONSTRUCTIONS
- E21—EARTH OR ROCK DRILLING; MINING
- E21B—EARTH OR ROCK DRILLING; OBTAINING OIL, GAS, WATER, SOLUBLE OR MELTABLE MATERIALS OR A SLURRY OF MINERALS FROM WELLS
- E21B7/00—Special methods or apparatus for drilling
- E21B7/28—Enlarging drilled holes, e.g. by counterboring
-
- E—FIXED CONSTRUCTIONS
- E21—EARTH OR ROCK DRILLING; MINING
- E21D—SHAFTS; TUNNELS; GALLERIES; LARGE UNDERGROUND CHAMBERS
- E21D20/00—Setting anchoring-bolts
- E21D20/003—Machines for drilling anchor holes and setting anchor bolts
-
- E—FIXED CONSTRUCTIONS
- E21—EARTH OR ROCK DRILLING; MINING
- E21D—SHAFTS; TUNNELS; GALLERIES; LARGE UNDERGROUND CHAMBERS
- E21D20/00—Setting anchoring-bolts
- E21D20/02—Setting anchoring-bolts with provisions for grouting
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- Engineering & Computer Science (AREA)
- Mining & Mineral Resources (AREA)
- Life Sciences & Earth Sciences (AREA)
- Geology (AREA)
- General Life Sciences & Earth Sciences (AREA)
- Geochemistry & Mineralogy (AREA)
- Structural Engineering (AREA)
- Physics & Mathematics (AREA)
- Environmental & Geological Engineering (AREA)
- Fluid Mechanics (AREA)
- Piles And Underground Anchors (AREA)
Abstract
The invention discloses a top plate reinforcing grouting device and a grouting method. The grouting equipment comprises a funnel-shaped grouting tool bit, an inner sleeve and an outer sleeve, wherein the inner sleeve and the outer sleeve are both provided with openings at the top ends, the inner sleeve is positioned inside the outer sleeve, and the top end of the inner sleeve is fixedly connected with the top end of the outer sleeve through an annular steel plate; an inner air bag is bonded on the inner wall of the inner sleeve, and mounting holes are formed in two sides of the inner air bag; the funnel-shaped grouting tool bit comprises a bucket body bottom and a grouting pipe, the bucket body bottom is bonded on the inner wall of the inner air bag, the grouting pipe penetrates out of the mounting hole and extends to the outer side of the outer wall of the inner air bag, and a through hole for the grouting pipe to penetrate through is formed in the outer sleeve at a position corresponding to the mounting hole; the outer side of the upper end of the outer sleeve is bonded with an outer airbag; the bottom of the outer sleeve is provided with a small ventilation hole, the small ventilation hole is covered with a breathable blocking cloth, and the breathable blocking cloth is adhered to the outer wall of the bottom of the outer sleeve. The invention has simple structure and convenient operation, and does not need to punch a common anchor rod hole again after grouting, thereby reducing the engineering quantity.
Description
Technical Field
The invention belongs to the technical field of mine roadway support, and particularly relates to top plate reinforcing grouting equipment and a grouting method.
Background
In the engineering application of anchor rod support, the failure mode of the anchor rod is mainly the slippage instability between the anchor rod and the hole wall when coal ash adhered on the hole wall or broken soft surrounding rock and the like are encountered in the anchoring process in the supporting process, in order to solve the slippage instability problem of the anchor rod, the prior art mostly adopts an anchor rod hole reaming mode to solve the problems, for example, in the prior art CN 109779662A, a method for reaming and filling the bottom of the anchor rod hole of the soft coal rock roadway is disclosed, the hole is reamed at the bottom of the anchor rod hole, then grouting is carried out, common anchor rod holes are reamed for anchoring after grouting, the property of the surrounding rock around the anchor rod hole is changed equivalently after reaming and grouting are solidified, and the anchoring performance of the anchor rod is improved. However, it requires re-drilling of ordinary anchor rod holes for anchoring after grouting, which increases the amount of work and operation costs, and increases the amount of grout used.
Disclosure of Invention
The invention aims to provide roof reinforcing grouting equipment and a grouting method which are simple in structure and convenient to use.
In order to achieve the purpose, the invention provides roof reinforcing grouting equipment which comprises a funnel-shaped grouting tool bit, an inner sleeve and an outer sleeve, wherein the inner sleeve and the outer sleeve are both provided with openings at the top ends; an inner air bag is bonded on the inner wall of the inner sleeve, and mounting holes are formed in two sides of the inner air bag; the funnel-shaped grouting tool bit comprises a bucket body bottom and a grouting pipe, the bucket body bottom is bonded on the inner wall of the inner air bag, the grouting pipe penetrates out of the mounting hole and extends to the outer side of the outer wall of the inner air bag, and a through hole for the grouting pipe to penetrate through is formed in the outer sleeve at a position corresponding to the mounting hole; the outer side of the upper end of the outer sleeve is bonded with an outer airbag; the bottom of the outer sleeve is provided with a small ventilation hole, the small ventilation hole is covered with a breathable blocking cloth, and the breathable blocking cloth is adhered to the outer wall of the bottom of the outer sleeve.
Preferably, the inner bladder is cylindrical; the outer air sac is in a circular ring shape.
Preferably, the circular steel plate is provided with a vent hole.
Preferably, the inner airbag is connected with the air valve through an inner airbag ventilation duct, and the outer airbag is connected with the air valve through an outer airbag ventilation duct.
The arrangement of the inner air bag ensures that the top of the funnel-shaped grouting cutter head can be retracted into the outer sleeve after the inner air bag is inflated; after the inner air bag is deflated, the top of the funnel-shaped grouting cutter head can extend out of the outer sleeve under the pressure of grout during grouting.
Preferably, the bottom of the outer sleeve is made of a wavy plate, and the small air holes are formed in the position, concave to the top end of the outer sleeve, of the wavy plate.
When the performance of the roof rock mass needs to be improved, firstly, anchoring holes are drilled in the surrounding rock, then, the hole bottoms of the anchoring holes are subjected to hole expanding treatment by adopting the conventional method, and then, the roof reinforcing grouting equipment disclosed by the invention is used for grouting.
A method of roof reinforcing grouting comprising the steps of:
(1) drilling an anchoring hole into the surrounding rock at a position needing top plate reinforcement, and performing hole bottom reaming treatment on the drilled anchoring hole to obtain a hole bottom reamed anchoring hole;
(2) inflating the inner air bag to enable the funnel-shaped grouting tool bit to retract into the outer sleeve, injecting gas into the outer air bag when the grouting equipment is deeply inserted into a designated area, ensuring the stability of the whole equipment in the working process and preventing slurry from flowing out, and simultaneously discharging the gas in the inner air bag;
(3) injecting high-pressure slurry into the inner sleeve by a high-pressure pump station, enabling the top of the grouting tool bit to extend out of the outer sleeve through the mounting hole by the pressure of the slurry, uniformly injecting the slurry to a filling area through the grouting tool bit, ensuring that the top of the grouting tool bit extends completely by the high-pressure slurry, discharging gas in the filling area through a small ventilation hole at the bottom of the outer sleeve, and ensuring that the slurry completely fills the whole filling area;
(4) when the whole filling area is filled with the slurry, the filling pressure is increased suddenly due to the fact that the air-permeable blocking cloth (the air-permeable blocking cloth can be made of proper materials according to the requirements on the site, and can also be made of multiple layers) prevents the slurry from passing through, and then the filling work can be finished;
(5) after filling, injecting gas into the inner air bag after the slurry is initially set to recover the grouting cutter head, discharging gas in the outer air bag, pumping the whole equipment out of a filling area, and finishing grouting work.
The invention has the following beneficial effects: the top plate reinforcing and grouting equipment can uniformly inject grout into a filling area, and is simple in structure and convenient to operate; and after grouting, common anchor rod holes do not need to be drilled again, so that the engineering quantity, the use amount of grout and the operation cost are reduced.
Drawings
FIG. 1 is a schematic view of the structure of the roof reinforcing grouting apparatus of the present invention after the inner bladder is inflated;
FIG. 2 is a schematic view of the construction of the roof reinforcing grouting apparatus of the present invention after the inner bladder is deflated;
FIG. 3 is a schematic view of section A-A of FIG. 1;
fig. 4 is a schematic view of part B-B of fig. 2.
Detailed Description
The invention will be further illustrated with reference to specific examples, without however restricting the scope of the invention thereto.
Example 1
As shown in fig. 1 to 4, a top plate reinforcing grouting device comprises a funnel-shaped grouting tool bit 5, an inner sleeve 8 and an outer sleeve 10, wherein the inner sleeve 8 and the outer sleeve 10 are both provided with openings at the top ends, the inner sleeve 8 is positioned inside the outer sleeve 10, and the top end of the inner sleeve 8 is welded and fixed with the top end of the outer sleeve 10 through a circular steel plate 11; the inner wall of the inner sleeve 8 is bonded with an inner air bag 6, and mounting holes 13 are formed in the two sides of the inner air bag 6; the funnel-shaped grouting cutter 5 head comprises a bucket body bottom 501 and a grouting pipe 502, the bucket body bottom 501 is bonded on the inner wall of the inner air bag 6, the grouting pipe 502 penetrates out of the mounting hole 13 and extends to the outer side of the outer wall of the inner air bag, and a through hole 12 for the grouting pipe 502 to penetrate through is arranged on the outer sleeve 10 corresponding to the mounting hole 13; the outer side of the upper end of the outer sleeve 10 is bonded with an outer airbag 4; a plurality of small air holes 7 are formed in the bottom of the outer sleeve 10, the bottom of the outer sleeve 10 is made of a wavy plate, and the small air holes 7 are formed in the positions, concave to the top end of the outer sleeve, of the glass-wave plate. The small air holes 7 are covered with air-permeable barrier cloth 14 (not shown in figure 1), and the air-permeable barrier cloth 14 is adhered to the outer wall of the bottom of the outer sleeve.
The inner air bag 6 is cylindrical; the outer bladder 4 is annular. The circular steel plate 11 is provided with a vent hole 9. The inner airbag 6 is connected with the air valve 1 through the inner airbag ventilation pipeline 3, and the outer airbag 4 is connected with the air valve 1 through the outer airbag ventilation pipeline 2.
A method of roof reinforcing grouting comprising the steps of:
(1) drilling an anchoring hole into the surrounding rock at a position needing top plate reinforcement, and performing hole bottom reaming treatment on the drilled anchoring hole to obtain a hole bottom reamed anchoring hole;
(2) inflating the inner air bag to enable the grouting tool bit to retract into the outer sleeve, injecting gas into the outer air bag when the grouting equipment is deeply inserted into a specified area, ensuring the stability of the whole equipment in the working process and preventing grout from flowing out, and simultaneously discharging the gas in the inner air bag;
(3) injecting high-pressure slurry into the inner sleeve by a high-pressure pump station, enabling the top of a grouting tool bit to extend out of the outer sleeve through a mounting hole by the pressure of the slurry, uniformly injecting the slurry to a filling area through the grouting tool bit, ensuring that the top of the tool bit extends outwards completely by the high-pressure slurry, and discharging gas in the filling area through a small vent hole at the bottom of the outer sleeve to ensure that the slurry completely fills the whole filling area;
(4) after the whole filling area is filled with the slurry, the filling pressure is increased suddenly due to the fact that the blocking cloth prevents the slurry from passing through, and then filling work can be finished;
(5) and after the filling is finished, staying for 3-5 minutes, injecting gas into the inner air bag after the slurry is initially set to recover the grouting tool bit, discharging the gas in the outer air bag, pumping the whole equipment out of the filling area, and finishing the grouting work. After grouting, the blocking cloth is invalid, and only the adhered gauze needs to be taken down and replaced.
The top plate reinforcing and grouting equipment can uniformly inject grout into a filling area, and is simple in structure and convenient to operate; and after grouting, common anchor rod holes do not need to be drilled again, so that the engineering quantity and the operation cost are reduced. The subsequent anchor rod that adopts anchors can effectively improve the intensity, stability and other mechanical properties of roof rock mass, improves the operating condition under the high risk roof operation environment.
While the invention has been described with reference to a preferred embodiment, it will be understood by those skilled in the art that various changes may be made and equivalents may be substituted for elements thereof without departing from the scope of the invention.
Claims (5)
1. The utility model provides a slip casting equipment is consolidated to roof which characterized in that: the device comprises a funnel-shaped grouting tool bit, an inner sleeve and an outer sleeve, wherein the inner sleeve and the outer sleeve are both provided with openings at the top ends, the inner sleeve is positioned inside the outer sleeve, and the top end of the inner sleeve is fixedly connected with the top end of the outer sleeve through a circular steel plate; an inner air bag is bonded on the inner wall of the inner sleeve, and mounting holes are formed in two sides of the inner air bag; the funnel-shaped grouting tool bit comprises a bucket body bottom and a grouting pipe, the bucket body bottom is bonded on the inner wall of the inner air bag, the grouting pipe penetrates out of the mounting hole and extends to the outer side of the outer wall of the inner air bag, and a through hole for the grouting pipe to penetrate through is formed in the outer sleeve at a position corresponding to the mounting hole; the outer side of the upper end of the outer sleeve is bonded with an outer airbag; the bottom of the outer sleeve is provided with a small ventilation hole, the small ventilation hole is covered with a breathable blocking cloth, and the breathable blocking cloth is adhered to the outer wall of the bottom of the outer sleeve.
2. The roof reinforcing grouting apparatus of claim 1, wherein: the inner air bag is cylindrical; the outer air sac is in a circular ring shape.
3. The roof reinforcing grouting apparatus of claim 1, wherein: the circular steel plate is provided with a vent hole.
4. The roof reinforcing grouting apparatus of claim 1, wherein: the bottom of the outer sleeve is made of a wavy plate, and the small air holes are formed in the positions, concave to the top end of the outer sleeve, of the wavy plate.
5. A method of roof reinforcing grouting using the roof reinforcing grouting equipment of any one of claims 1 to 4, characterized by comprising the steps of:
(1) drilling an anchoring hole into the surrounding rock at a position needing top plate reinforcement, and performing hole bottom reaming treatment on the drilled anchoring hole to obtain a hole bottom reamed anchoring hole;
(2) inflating the inner air bag to enable the grouting tool bit to retract into the outer sleeve, injecting gas into the outer air bag when the grouting equipment is deeply inserted into a specified area, ensuring the stability of the whole equipment in the working process and preventing grout from flowing out, and simultaneously discharging the gas in the inner air bag;
(3) high-pressure slurry is injected into the inner sleeve through a high-pressure pump station, the top of the grouting cutter head extends out of the outer sleeve through the mounting hole under the pressure of the slurry, the slurry is uniformly injected into a filling area through the grouting cutter head, the top of the grouting cutter head is ensured to be completely extended by the high-pressure slurry, and gas in the filling area is discharged from a small vent hole in the bottom of the outer sleeve to ensure that the slurry completely fills the whole filling area;
(4) after the whole filling area is filled with the slurry, the filling pressure is increased suddenly due to the fact that the blocking cloth prevents the slurry from passing through, and then filling work can be finished;
(5) after filling, injecting gas into the inner air bag after the slurry is initially set to recover the grouting cutter head, discharging gas in the outer air bag, pumping the whole equipment out of a filling area, and finishing grouting work.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201910607698.6A CN110219685B (en) | 2019-07-08 | 2019-07-08 | Roof reinforcing grouting equipment and grouting method |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201910607698.6A CN110219685B (en) | 2019-07-08 | 2019-07-08 | Roof reinforcing grouting equipment and grouting method |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN110219685A CN110219685A (en) | 2019-09-10 |
| CN110219685B true CN110219685B (en) | 2020-09-18 |
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201910607698.6A Expired - Fee Related CN110219685B (en) | 2019-07-08 | 2019-07-08 | Roof reinforcing grouting equipment and grouting method |
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| Country | Link |
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| CN (1) | CN110219685B (en) |
Families Citing this family (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN112726567A (en) * | 2020-12-29 | 2021-04-30 | 薛道岳 | Reinforcing apparatus that supplementary slip casting of construction soft soil foundation and reaming can |
Family Cites Families (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2006097272A (en) * | 2004-09-28 | 2006-04-13 | Ohbayashi Corp | Method of removing redundant portion of pipe bodies in natural ground reinforcing works |
| CN103321654B (en) * | 2013-07-04 | 2016-02-24 | 中国矿业大学 | The method of flexible air-bag process coal mine roadway roof collapse |
| CN104912071B (en) * | 2015-06-23 | 2016-08-24 | 新乡市嘉汇科技有限公司 | The double bellows of integration expands body anchor cable |
| CN106194250B (en) * | 2016-06-22 | 2018-08-03 | 西安科技大学 | A kind of gob-side entry retaining concrete filling wall annular air-pocket template |
| CN105937407B (en) * | 2016-06-22 | 2017-11-10 | 西安科技大学 | A kind of construction method of gob-side entry retaining concrete filling wall annular air-pocket |
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| CN110219685A (en) | 2019-09-10 |
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Granted publication date: 20200918 |