CN111810227A - Device and method for filling empty hole type goaf through surface grouting by mold bag method - Google Patents
Device and method for filling empty hole type goaf through surface grouting by mold bag method Download PDFInfo
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- CN111810227A CN111810227A CN202010459690.2A CN202010459690A CN111810227A CN 111810227 A CN111810227 A CN 111810227A CN 202010459690 A CN202010459690 A CN 202010459690A CN 111810227 A CN111810227 A CN 111810227A
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- 238000000034 method Methods 0.000 title claims abstract description 46
- 230000001681 protective effect Effects 0.000 claims description 22
- 239000000463 material Substances 0.000 claims description 16
- 238000007569 slipcasting Methods 0.000 claims description 15
- 239000004831 Hot glue Substances 0.000 claims description 4
- 125000004122 cyclic group Chemical group 0.000 claims description 3
- 230000000903 blocking effect Effects 0.000 claims description 2
- 238000011065 in-situ storage Methods 0.000 claims description 2
- 238000005065 mining Methods 0.000 abstract description 6
- 239000003245 coal Substances 0.000 abstract description 4
- 230000015572 biosynthetic process Effects 0.000 abstract description 2
- 238000010276 construction Methods 0.000 abstract description 2
- 239000002002 slurry Substances 0.000 description 13
- 238000005553 drilling Methods 0.000 description 8
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 description 8
- 239000004568 cement Substances 0.000 description 6
- 230000008569 process Effects 0.000 description 6
- 238000007664 blowing Methods 0.000 description 5
- XEEYBQQBJWHFJM-UHFFFAOYSA-N Iron Chemical compound [Fe] XEEYBQQBJWHFJM-UHFFFAOYSA-N 0.000 description 4
- 238000009826 distribution Methods 0.000 description 4
- 239000010881 fly ash Substances 0.000 description 4
- 239000004570 mortar (masonry) Substances 0.000 description 4
- 230000008859 change Effects 0.000 description 3
- 238000010586 diagram Methods 0.000 description 3
- 238000005516 engineering process Methods 0.000 description 3
- 238000005429 filling process Methods 0.000 description 3
- 238000002347 injection Methods 0.000 description 3
- 239000007924 injection Substances 0.000 description 3
- 238000004519 manufacturing process Methods 0.000 description 3
- 229920000122 acrylonitrile butadiene styrene Polymers 0.000 description 2
- 238000005452 bending Methods 0.000 description 2
- 230000005484 gravity Effects 0.000 description 2
- 229910052742 iron Inorganic materials 0.000 description 2
- 238000007789 sealing Methods 0.000 description 2
- 238000000926 separation method Methods 0.000 description 2
- 239000002699 waste material Substances 0.000 description 2
- 239000011083 cement mortar Substances 0.000 description 1
- 238000009792 diffusion process Methods 0.000 description 1
- 239000004744 fabric Substances 0.000 description 1
- 239000011440 grout Substances 0.000 description 1
- 230000006872 improvement Effects 0.000 description 1
- 239000012528 membrane Substances 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 238000000465 moulding Methods 0.000 description 1
- 238000007528 sand casting Methods 0.000 description 1
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- E—FIXED CONSTRUCTIONS
- E21—EARTH OR ROCK DRILLING; MINING
- E21F—SAFETY DEVICES, TRANSPORT, FILLING-UP, RESCUE, VENTILATION, OR DRAINING IN OR OF MINES OR TUNNELS
- E21F15/00—Methods or devices for placing filling-up materials in underground workings
- E21F15/005—Methods or devices for placing filling-up materials in underground workings characterised by the kind or composition of the backfilling material
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- E—FIXED CONSTRUCTIONS
- E21—EARTH OR ROCK DRILLING; MINING
- E21F—SAFETY DEVICES, TRANSPORT, FILLING-UP, RESCUE, VENTILATION, OR DRAINING IN OR OF MINES OR TUNNELS
- E21F15/00—Methods or devices for placing filling-up materials in underground workings
- E21F15/06—Filling-up mechanically
-
- E—FIXED CONSTRUCTIONS
- E21—EARTH OR ROCK DRILLING; MINING
- E21F—SAFETY DEVICES, TRANSPORT, FILLING-UP, RESCUE, VENTILATION, OR DRAINING IN OR OF MINES OR TUNNELS
- E21F17/00—Methods or devices for use in mines or tunnels, not covered elsewhere
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- Mining & Mineral Resources (AREA)
- Life Sciences & Earth Sciences (AREA)
- General Life Sciences & Earth Sciences (AREA)
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- Forms Removed On Construction Sites Or Auxiliary Members Thereof (AREA)
- Consolidation Of Soil By Introduction Of Solidifying Substances Into Soil (AREA)
Abstract
The invention relates to a device and a method for filling a cavity type goaf, belongs to the technical field of coal mining, and particularly relates to a device and a method for filling the cavity type goaf through surface grouting by a mold bag method. The device and the method can realize the formation of the support pier stud with controllable form at the preset position in the goaf, are suitable for the field of large-cavity goaf treatment, solve the problems that the mining working surface is closed, people cannot directly enter the working surface for filling treatment after years, and the goaf has to be treated due to the construction needs of railways, roads and buildings, and provide a new efficient and economic method for the grouting treatment of the goaf.
Description
Technical Field
The invention relates to a device and a method for filling a cavity type goaf, belongs to the technical field of coal mining, and particularly relates to a device and a method for filling the cavity type goaf through surface grouting by a mold bag method.
Background
The large-cavity type goaf left in the coal mine is an unstable artificial geological structure, and the unstable structure can be degraded to derive mine disasters such as ground collapse, mine earthquake and the like along with the formation time and the occurrence environment change. With the rapid advance of the processes of urbanization, industrialization and modernization, more and more coal mine goafs are covered with land which needs to be activated, or used for building industrial civil buildings, or building life line projects such as roads and railways, how to perform safe, economical and efficient grouting treatment on large-cavity goafs and create a safe and reliable underground environment for the construction of the old goafs covered with ground projects is always a difficult engineering problem.
The goaf is different from a goaf in filling mining, the goaf generally has a hollow safety threat left in a mine which does not perform production, the goaf is about 100 meters shallow and about 1000 meters deep, a mining working face is closed, people cannot assign the position of the goaf, and the goaf can not be filled precisely in the underground goaf like filling mining, so that the goaf belongs to the problem of 'black boxes' which is very difficult to solve. At present, the method for treating the old dead zone in China is generally a grouting filling method, namely, slurry or slurry sand casting grouting filling is carried out on the old dead zone through a ground drilling hole. The disadvantages of this method are: (1) the slurry has large fluidity and far diffusion, and cannot be filled if cracks or channels exist; (2) the slurry is not easy to condense and form after the old goaf is filled with water; (3) the setting rate of the slurry is low, and the slurry cannot be piled up to form a support body with controllable shape and size at a specified position; (4) less effective filling of the slurry, great waste and high economic cost.
Therefore, the invention provides the device and the method for filling the cavity type goaf through the earth surface grouting by the mold bag method, so that the goaf is accurately and efficiently filled, the partial filling design is met, and the grouting cost is saved.
Disclosure of Invention
The invention aims to provide a device and a method for filling a cavity type old goaf by the mold bag method through the mold bag method, which have the advantages of controllable support range, economy and high efficiency.
In order to achieve the purpose, the technical scheme adopted by the invention is as follows:
a mould bag grouting filling device comprises a guide pipe, wherein a hoop capable of moving along the axial direction of the guide pipe is arranged in the guide pipe, a mould bag is connected onto the hoop, and the other end of the mould bag freely extends in the guide pipe; wherein, the mould bag is connected with the air supply pipe and the grouting pipe.
Preferably, in the above-mentioned mould bag slip casting filling device, the slip casting pipe is nested in the air supply pipe, the hoop clamp is located on the air supply pipe, and can follow the air supply pipe removes.
Preferably, the above-mentioned mould bag slip casting filling device includes:
one end of the end socket is provided with an end socket groove, and the other end of the end socket is provided with a bulge for blocking the annular hoop from sliding;
a clamping tenon is arranged at the tail end of the rail which moves towards the hoop, and a lantern ring which can move under the pulling of the pull rope is arranged outside the clamping tenon;
when the lantern ring is at least partially sleeved on the clamping tenon, the clamping tenon is locked on the end socket groove.
Preferably, the above-mentioned apparatus for filling a slip casting into a mold bag further comprises: the supporting tube is hinged with the guide tube; the grouting pipe comprises a vertical section grouting pipe positioned in the supporting pipe and a horizontal section grouting pipe positioned in the guide pipe, and the vertical section grouting pipe is connected with the horizontal section grouting pipe through a hose.
Preferably, foretell mould bag slip casting filling device still includes the safety cover, the other end of mould bag freely extends to in the safety cover in the stand pipe, the safety cover with adopt the hot melt adhesive to bond between the stand pipe.
A method for filling a cavity type old goaf by surface grouting by using any one of the devices is characterized in that: the method comprises the following steps:
Preferably, the method for filling the cavern type goaf by surface grouting further comprises the following steps:
and 7, recovering the device: the guide pipe is descended and rotated to be vertical by a winch, the rest parts except the mould bag, the end head and the protective cover are recovered, and the mould bag and the filling material are left in situ to form a pier column body for supporting the top plate of the goaf.
Preferably, in the above method for filling a cavern type gob by surface grouting, in step 5, high-pressure air is continuously supplied to the mold bag during grouting to maintain the bulge shape of the mold bag, so as to maintain the stability of the mold bag shape and the grouting process.
A method for filling a cave type old goaf by surface grouting comprises the following steps:
sending a guide pipe into a preset position of the gob, wherein an annular hoop capable of moving along the axial direction of the guide pipe is arranged in the guide pipe, a mold bag is connected onto the annular hoop, and the other end of the mold bag freely extends in the guide pipe;
ventilating the mold bag by using an air supply pipe to drive the mold bag to integrally slide and expand;
the mold bag is grouted using a grout tube to form a pier stud.
Preferably, in the method for filling the empty hole type goaf by surface grouting, the grouting pipe is sleeved in the air supply pipe, and the annular hoop is arranged on the air supply pipe and can move along the air supply pipe.
Compared with the prior art, the invention has the advantages that:
(1) the flowing range of the slurry is controllable, and even if cracks or channels exist, the empty area can be filled as required; (2) whether the old dead zone is filled with water or not, the membrane bag can provide a relatively independent space for the injected slurry to be coagulated and formed after being continuously inflated; (3) the slurry setting rate is high, and a support body with controllable shape and size can be formed at a designated position according to design requirements; (4) the slurry is high in effective filling, no waste is caused, and the economic cost is low.
Drawings
Fig. 1 is a schematic diagram of a device for filling a cavity-type goaf by surface grouting by a mold bag method according to an embodiment of the invention;
fig. 2 is a schematic view showing an enlarged view of a guide pipe of a device for filling a cavity-type goaf by surface grouting by a mold bag method according to an embodiment of the present invention;
fig. 3 is a schematic structural diagram of a locked state of a head section of a device for filling a cavity type goaf through surface grouting by a mold bag method according to an embodiment of the present invention;
fig. 4 is a schematic structural diagram of a head section of a device for filling a cavity type goaf through surface grouting by a mold bag method according to an embodiment of the present invention in a disengaged state;
the reference numbers in the embodiments of the present invention are as follows, in combination with the accompanying drawings:
1. a winch; 2. an air compressor; 3 grouting pump; 4. a gas supply pipe; 5. a grouting pipe; 6. drilling; 7. pulling a rope; 8. supporting a tube; 9. a guide tube; 10. molding bags; 11. filling materials; 12. old empty area; 13. a wire guide wheel; 14. a collar; 15. a tenon is clamped; 16. a tip; 17. a protective cover; 18. a hinge; 19. grouting a hose; 20. an annular hoop; 21. a spring; 22. a hinge shaft; 23. a groove; 24. and (4) a rope hoop.
Detailed Description
The preferred embodiments of the present invention will be described in conjunction with the accompanying drawings, and it will be understood that they are described herein for the purpose of illustration and explanation and not limitation.
The old dead zone device of cavity type is filled in slip casting of mould bag method earth's surface that this embodiment adopted includes: grouting pump, air compressor machine, hoist engine, air supply pipe, slip casting pipe, stay tube, stand pipe, lantern ring, mould bag and connecting device.
The air supply pipe 4, the grouting pipe 5 and the pull rope 7 are all arranged in the support pipe 8 and communicated to the guide pipe 9 through the opening; the guide pipe 9 is hinged with the support pipe 8, and the vertical section grouting pipe is connected with the horizontal section grouting pipe through a grouting hose.
The annular sleeve between air supply pipe 4 and stand pipe 9 in be provided with the ventilative mould bag 10 of permeating water of high strength, mould bag 10 one end is fixed to the hoop 20 that is located 9 pipe anterior segments of direction, the other end freely extends and is in safety cover 17.
The annular hoop 20 can move to the tail end of the air supply pipe along with the expansion process of the mold bag and is clamped at the end head; the locking and unlocking between the end head section and the air supply pipe 4 are realized by the latch 15, namely, the steering pull rope is controlled by the winch to change the guide pipe from the vertical direction to the horizontal direction, and the unlocking pull rope controls the opening and closing of the lantern ring through a wire theory to realize the locking and unlocking of the latch.
The exhaust pressure of the air compressor is more than or equal to 1MPa, and the exhaust volume is more than or equal to 3m3Min, injecting high-pressure gas through the annular gap between the gas injection pipe and the grouting pipe to expand the tail part of the mold bag, driving the mold bag to integrally slide and expand, blowing out the gas out of the guide pipe, jacking the protective cover 17, and fully expanding the protective cover at the designed position, wherein the air quantity at the blowing stage of the mold bag is less than or equal to 0.5m3H, after the whole blowing and expanding are finished, the exhaust amount is kept to be more than or equal to 2m3And h, keeping the internal pressure of the mold bag to reach the requirement (see table 1).
TABLE 1 pressure setting (MPa) in the filling process of the mold bag
The grouting pipe 3 is contained in the air supply pipe 4, the air supply pipe 4 is contained in the guide pipe 9, wherein the left end of an annular gap between the air supply pipe and the guide pipe is closed, and the annular gap between the grouting pipe and the air supply pipe is open.
The bag mouth of the mold bag 10 is tied on the annular hoop 20 by a hoop rope and is sleeved outside the air supply pipe, and the tail end of the end is sealed by a protective cover to prevent the pipe from being blocked. The annular band 20 has an inner diameter slightly larger than the outer diameter of the ferrule and an outer diameter smaller than the diameter of the end nose. The protective cover is a disposable device and is bonded with the guide pipe by hot melt adhesive, and the protective cover is made of ABS plastic or iron sheet.
The height of the mold bag is 1.1-1.2 times of the height of the old goaf to be filled, the mold bag is made of 210D, 420D or 600D oxford, a lacing tape is arranged in the mold bag, and the bag opening is positioned at the top of the side of the shape formed by expansion.
After the annular hoop is sleeved outside the air supply pipe, the end head is fixedly connected with the air supply pipe through the tenon 15, and the opening of the annular hoop is limited by the lantern ring.
The air supply pipe continuously supplies air in the grouting and filling process, and the pressure is kept to enable the mold bag to be in the bulging state so as to maintain the mold bag shape and the stability in the grouting process.
After the end groove 23 is fixedly connected with the air supply pipe through the clamping tenon 15, the clamping tenon 15 is locked by the lantern ring to limit the opening of the clamping tenon 15, after the designed filling amount is reached, the lantern ring 14 is pulled through the pull rope 7, the clamping tenon 15 is opened, and the end is separated from the air supply pipe under the grouting pressure.
The filling material is pure cement slurry, cement fly ash mortar, cement mortar or cement fly ash mortar, a high water material or an ultrahigh water material.
In the above apparatus, the method of filling the cavity-type goaf by the surface grouting in the mold bag method of this embodiment includes the following steps:
firstly, exploring the shape of the old goaf by adopting the technologies of drilling, drilling television, three-dimensional laser scanning and the like, determining the distribution and the shape of the old goaf by combining the data information of a treatment area, and calculating the size of a pier column required for ensuring the roof of the old goaf to be stable;
secondly, manufacturing a mold bag according to the distribution, the shape and the size of the old empty area and the requirements of the mold bag in the device;
thirdly, sleeving the annular hoop outside the air supply pipe, connecting the end head section with the air supply pipe by using a clamp 15 tenon, limiting the opening of the clamp tenon by using a sleeve ring 14 to realize a locking structure, and installing an end head;
fourthly, tying the bag opening of the mold bag on an annular hoop 20 by a hoop rope, pushing the annular hoop 20 to fold the mold bag carried by the mold bag and put into a sleeve between a guide pipe and an air supply pipe, sealing the tail end of an end section by a protective cover 17, and filling the mold bag into the pipe;
fifthly, taking a drill rod as a grouting pipe, feeding the supporting pipe 8 and the guide pipe 9 to a preset depth, feeding the mold bag to a preset position of the old goaf through the supporting pipe and the guide pipe, and horizontally moving the guide pipe 9 to a preset filling position after being lifted and rotated by a winch; the supporting tube 8 is positioned in a drill hole above the goaf and has the function of ensuring the stability of a lower device and preventing the bending deformation caused by the gravity center shift when the guide tube is lifted;
sixthly, injecting high-pressure gas through a sleeve between the gas supply pipe 4 and the grouting pipe 5 by using an air compressor to expand the tail part of the mold bag, driving the mold bag to integrally slide and expand, blowing the mold bag out of the guide pipe, jacking the protective cover, fully expanding the mold bag to a preset shape at a designed position, and simultaneously driving the annular clamp 20 to slide towards the tail end and limit the annular clamp at the bulge part of the end head 16;
step seven, filling the filling material into the mould bag through a grouting pump by a grouting pipe, and continuously conveying high-pressure air through an annular gap between the grouting pipe and an external air supply pipe during grouting to keep the shape of the mould bag;
eighthly, after the designed filling amount is reached, opening the lantern ring through the pull rope, unlocking the clamping tenon to realize end separation, finally separating the mould bag and the end section from the air supply pipe, and leaving the mould bag and the filling material in the original position to form a pier column body for supporting the top plate of the old dead zone;
and step nine, descending and rotating the guide pipe to be vertical by a winch, and recovering the rest parts except the die bag, the end head and the protective cover.
The scheme of the embodiment is verified based on the old empty area of a small kiln.
The depth of the small kiln old goaf is 163m, old goaf shape exploration is carried out through technologies such as drilling, drilling television, three-dimensional laser scanning and the like, and the existing goaf is found to be 6.7m in height, ellipsoid in shape, 12m on the long side, 8m on the short side, 7.4m in height, 210D oxford cloth in material, a lacing wire belt is arranged inside the existing goaf, and a bag opening is located at the top of the side of the shape formed after expansion. Near old dead zone prepares mould bag method earth surface slip casting and fills cavity type old dead zone device includes: grouting pump, air compressor machine, hoist engine, air supply pipe, slip casting pipe, stay tube, stand pipe, lantern ring, mould bag and connecting device. The air supply pipe, the grouting pipe and the pull rope are all arranged in the support pipe and communicated into the guide pipe through the opening; the guide pipe is hinged with the supporting pipe, and the vertical section grouting pipe is connected with the horizontal section grouting pipe through a grouting hose. The annular sleeve between air supply pipe and the stand pipe in be provided with the ventilative mould bag of high strength permeating water, mould bag one end is fixed to the hoop that is located the stand pipe anterior segment, the other end freely extends and is in the safety cover. The annular hoop can move to the tail end of the air supply pipe along with the expansion process of the mold bag and is clamped at the end head; the locking and unlocking between the end head section and the air supply pipe are realized by the clamping tenon, namely, the steering pull rope is controlled by the winch to change the guide pipe from the vertical direction to the horizontal direction, and the unlocking pull rope controls the opening and closing of the lantern ring through a wire theory to realize the locking and unlocking of the clamping tenon. High-pressure gas is injected into the mold bag through a sleeve between the gas injection pipe and the grouting pipe through the air compressor to expand the tail of the mold bag, the mold bag is driven to integrally slide and expand, the mold bag is blown out of the guide pipe, the protective cover is jacked open, and the mold bag is fully expanded at the designed position. The slip casting pipe contain in the air supply pipe, the air supply pipe contains in the stand pipe, wherein the annular space left end between air supply pipe and the stand pipe is closed, the annular space between slip casting pipe and the air supply pipe is opened. The die bag sack be tied up on cyclic annular clamp and overlap in the air supply pipe outside by the hoop rope bundle, the end has the safety cover to seal, prevents to block up the pipe. The inner diameter of the annular clamp is slightly larger than the outer diameter of the ferrule, and the outer diameter of the annular clamp is smaller than the diameter of the bulge of the end head. The protective cover is a disposable device and is bonded with the guide pipe by hot melt adhesive, and the protective cover is made of ABS plastic or iron sheet. The annular hoop is sleeved outside the air supply pipe, the end head is fixedly connected with the air supply pipe through the clamping tenon, and the opening of the annular hoop is limited by the lantern ring. The air supply pipe continuously supplies air in the grouting and filling process, and the pressure is kept to enable the mold bag to be in the bulging state so as to maintain the mold bag shape and the stability in the grouting process. After the end socket groove part is fixedly connected with the air supply pipe through the clamping tenon, the clamping tenon is locked by the lantern ring to limit the opening of the clamping tenon, after the designed filling amount is reached, the lantern ring is pulled through the pull rope, the clamping tenon is opened, and the end socket is separated from the air supply pipe under the grouting pressure. The filling material is pure cement slurry, cement fly ash mortar, cement fly ash mortar, a high-water material or an ultrahigh-water material.
The specific treatment steps of the small kiln old goaf are as follows:
firstly, exploring the shape of the old goaf by adopting the technologies of drilling, drilling television, three-dimensional laser scanning and the like, determining the distribution and the shape of the old goaf by combining the data information of a treatment area, and calculating the size of a pier column required for ensuring the roof of the old goaf to be stable;
secondly, manufacturing a mold bag according to the distribution, the shape and the size of the old empty area and the requirements of the mold bag in the device;
thirdly, sleeving the annular hoop outside the air supply pipe, connecting the end head section with the air supply pipe through the clamping tenon, limiting the opening of the clamping tenon through the lantern ring to realize a locking structure, and installing an end head;
fourthly, tying the bag opening of the mold bag on an annular hoop by a hoop rope, pushing the annular hoop to fold and pack the mold bag into a sleeve between a guide pipe and an air supply pipe, sealing the tail end of an end section by using a protective cover, and filling the mold bag into the pipe;
fifthly, taking a drill rod as a grouting pipe, feeding the supporting pipe and the guide pipe into a preset depth, feeding the mold bag into a preset position of the gob through the supporting pipe and the guide pipe, and horizontally moving the guide pipe to a preset filling position after the guide pipe is lifted and rotated by a winch; the supporting tube is positioned in a drill hole above the old dead zone and has the function of ensuring the stability of a lower device and preventing the bending deformation caused by the gravity center shift when the guide tube is lifted;
sixthly, injecting high-pressure gas through a sleeve between the gas injection pipe and the grouting pipe by using an air compressor to expand the tail part of the mold bag, driving the mold bag to integrally slide and expand, blowing the mold bag out of the guide pipe, jacking the protective cover, fully expanding the mold bag to a preset shape at a designed position, and simultaneously driving the annular clamp to slide towards the tail end and limit the annular clamp at the protruding part of the end head;
step seven, filling the filling material into the mould bag through a grouting pump by a grouting pipe, and continuously conveying high-pressure air through an annular gap between the grouting pipe and an external air supply pipe during grouting to keep the shape of the mould bag;
eighthly, after the designed filling amount is reached, opening the lantern ring through the pull rope, unlocking the clamping tenon to realize end separation, finally separating the mould bag and the end section from the air supply pipe, and leaving the mould bag and the filling material in the original position to form a pier column body for supporting the top plate of the old dead zone;
and ninthly, descending and rotating the guide pipe to be vertical by a winch, and recovering the rest parts except the mold bag, the end head and the protective cover so as to treat the next goaf.
Finally, it should be noted that: although the present invention has been described in detail with reference to the foregoing embodiments, it will be apparent to those skilled in the art that changes may be made in the embodiments and/or equivalents thereof without departing from the spirit and scope of the invention. Any modification, equivalent replacement, or improvement made within the spirit and principle of the present invention should be included in the protection scope of the present invention.
Claims (10)
1. The mould bag grouting filling device is characterized by comprising a guide pipe (9), wherein a hoop (20) capable of moving along the axial direction of the guide pipe (6) is arranged in the guide pipe (9), a mould bag (10) is connected onto the hoop (20), and the other end of the mould bag (10) freely extends in the guide pipe (9); wherein the mould bag (10) is connected with the air supply pipe (4) and the grouting pipe (5).
2. A mould bag slip casting and filling apparatus according to claim 1, wherein said slip casting pipe (5) is nested within said gas supply pipe (4), and said circumferential collar (20) is provided on said gas supply pipe (4) and is movable along said gas supply pipe (4).
3. The apparatus for filling a mold bag with a slip casting according to claim 1, comprising:
the end head (16) is provided with an end head groove (23) at one end and a bulge for blocking the annular hoop (20) from sliding at the other end;
a clamping tenon (15) is arranged at the tail end of the track where the annular hoop (20) moves, and a lantern ring (14) capable of moving under the pulling of a pull rope is arranged outside the clamping tenon (15);
when the lantern ring (14) is at least partially sleeved on the clamping tenon (15), the clamping tenon (15) is locked on the end socket (23).
4. The apparatus for filling a mold bag with a slip casting according to claim 1, further comprising: a supporting tube (8) hinged with the guide tube (9); the grouting pipe (5) comprises a vertical grouting pipe positioned in the supporting pipe (8) and a horizontal grouting pipe positioned in the guide pipe (9), and the vertical grouting pipe is connected with the horizontal grouting pipe through a hose.
5. A mould bag grouting filling device according to claim 1, characterised in that it also comprises a protective cover (17), the other end of the mould bag (10) freely extends into the protective cover (17) in the guide tube (9), and the protective cover (17) is bonded with the guide tube (9) by hot melt adhesive.
6. A method for filling a cavern type goaf by surface grouting by using the device of any one of claims 1 to 5, wherein: the method comprises the following steps:
step 1, mounting an end: the annular hoop is sleeved outside the air supply pipe, then the joint of the end head section and the air supply pipe is realized by the clamping tenon, and the clamping tenon is limited by the lantern ring to be opened to realize a locking structure.
Step 2, filling the mold bags: the bag opening of the mould bag is tied on the annular hoop by a hoop rope, the annular hoop is pushed to fold and pack the mould bag into a sleeve between the guide pipe and the air supply pipe, and the tail end of the end section is sealed by a protective cover.
Step 3, lowering and positioning: the mold bag is conveyed to the preset position of the gob through the supporting pipe and the guide pipe and is lifted by the winch through the pull rope to rotate to the horizontal direction.
Step 4, expanding the mold bag: high-pressure air is sent into through the air compressor machine and promotes the mould bag and back open the safety cover to blow and expand to predetermined shape, drive cyclic annular clamp simultaneously and slide to the end, limit in the protruding department of end.
Step 5, grouting and filling: filling the filling material into the mold bag through a grouting pump through a grouting pipe;
step 6, separating the mold bag: after the designed filling amount is reached, the lantern ring is opened through the pull rope, the clamping tenon is unlocked, the end head is separated, and finally the die bag and the end head section are separated from the air supply pipe.
7. The method of claim 6, further comprising the step of filling the cavern type goaf with surface grouting
And 7, recovering the device: the guide pipe is descended and rotated to be vertical by a winch, the rest parts except the mould bag, the end head and the protective cover are recovered, and the mould bag and the filling material are left in situ to form a pier column body for supporting the top plate of the goaf.
8. The method as claimed in claim 6, wherein in the step 5, high pressure air is continuously supplied to the mold bag during grouting to maintain the expanded shape of the mold bag, so as to maintain the stable shape of the mold bag and the stability during grouting.
9. A method for filling a cavity type old goaf by surface grouting is characterized by comprising the following steps:
sending a guide pipe (9) to a preset position of the goaf, wherein a circumferential hoop (20) capable of moving along the axial direction of the guide pipe (6) is arranged in the guide pipe (9), a mold bag (10) is connected to the circumferential hoop (20), and the other end of the mold bag (10) freely extends in the guide pipe (9);
ventilating the mold bag (10) by using the air supply pipe (4) to drive the mold bag to integrally slide and expand;
the mold pocket is grouted by a grouting pipe (5) to form a pier stud.
10. A method of grouting a goaf in a ground surface to fill a cavity of the goaf type in accordance with claim 9, characterized in that the grouting pipe (5) is sleeved inside the gas supply pipe (4), and the circumferential collar (20) is mounted on the gas supply pipe (4) and is movable along the gas supply pipe (4).
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| CN112832854A (en) * | 2020-12-29 | 2021-05-25 | 河海大学 | Tailing filling auxiliary roof connecting device and construction method thereof |
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