CN115263413B - A kind of goaf filling grouting equipment - Google Patents
A kind of goaf filling grouting equipment Download PDFInfo
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- CN115263413B CN115263413B CN202210959807.2A CN202210959807A CN115263413B CN 115263413 B CN115263413 B CN 115263413B CN 202210959807 A CN202210959807 A CN 202210959807A CN 115263413 B CN115263413 B CN 115263413B
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- stopping
- sleeve
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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
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- Life Sciences & Earth Sciences (AREA)
- General Life Sciences & Earth Sciences (AREA)
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Abstract
本发明属于煤矿采空区充填设备技术领域，具体的说是一种采空区充填注浆设备，包括注浆泵和注浆管，所述注浆管包括管体和止浆套，所述管体与注浆泵的输出口相互连通，所述管体下端连接有注浆头，所述止浆套套接安装在管体内部，所述管体的侧壁上开设有止浆孔，所述止浆套在外力作用下从止浆孔中向外凸出；本发明结构简单，可解决现有技术中止浆塞安装时易受损，不能充分封堵钻孔，影响注浆效果以及在注浆完毕后，止浆塞不能便捷回收的问题。
The present invention belongs to the technical field of coal mine goaf filling equipment, specifically a goaf filling grouting equipment, including a grouting pump and a grouting pipe, the grouting pipe including a pipe body and a grouting sleeve, the pipe body is connected to the output port of the grouting pump, the lower end of the pipe body is connected to a grouting head, the grouting sleeve is sleeved and installed inside the pipe body, a grouting hole is opened on the side wall of the pipe body, the grouting sleeve protrudes outward from the grouting hole under the action of external force; the present invention has a simple structure, and can solve the problems in the prior art that the grouting plug is easily damaged during installation, cannot fully seal the drill hole, affects the grouting effect, and the grouting plug cannot be easily recovered after the grouting is completed.
Description
Technical Field
The invention belongs to the technical field of coal mine goaf filling equipment, and particularly relates to goaf filling grouting equipment.
Background
In general, the goaf of the coal mine is left after the coal mining operation is finished, and if the goaf is not processed, the constructed projects such as buildings, water conservancy projects, traffic projects and the like are deformed or even damaged. At present, filling goaf with cement fly ash slurry is one of effective methods for managing goaf disasters.
In the grouting process, the traditional grouting pipe structure has no blocking structure, so that a large amount of slurry flows out of a drilling hole to cause waste, and when a grouting plug is adopted for treatment, the grouting plug is generally sleeved on the grouting pipe and put into a drilled drilling hole together with the grouting pipe to prevent slurry from flowing back, but in actual use, the phenomenon that the grouting plug is worn and deformed to cause damage is frequently caused in the installation process, gaps cannot be filled up due to irregular inner diameter of holes, and the like, slurry sealing cannot be continuously performed, so that blocking is not tight, slurry in the drilling hole flows back, and the grouting effect and filling treatment effect are seriously influenced;
Meanwhile, after grouting is completed, the grouting plug is located in the deep part of the drill hole and is not easy to recycle, in addition, after recycling of the grouting plug is completed, the slurry in the drill hole is decompressed, backflow of the slurry is easy to occur, and the filling treatment effect is also affected.
Disclosure of Invention
In order to overcome the defects of the prior art, solve the problems that the prior art is easy to damage when a grouting stop plug is installed, cannot fully block drilling holes, affect grouting effect and cannot be recovered conveniently after grouting is finished, the invention provides goaf grouting filling equipment.
The technical scheme adopted by the invention for solving the technical problems is that the goaf filling grouting equipment comprises a grouting pump and a grouting pipe, wherein the grouting pipe is communicated with an output port of the grouting pump, and the grouting pipe comprises:
The pipe body is communicated with an output port of the grouting pump, and the lower end of the pipe body is connected with a grouting head through threads;
The slurry stopping sleeve is sleeved and mounted in the pipe body, the slurry stopping sleeve is made of elastic rubber materials, a slot is formed in the lower portion in the pipe body, and the lower end of the slurry stopping sleeve is inserted into the slot;
The side wall of the pipe body is provided with slurry stopping holes which are spirally distributed on the side wall of the pipe body, and the projection of the slurry stopping holes on a horizontal plane is a complete circle, wherein the slurry stopping holes are in any one of L shape, T shape, arc shape and rectangle;
The grout stopping sleeves protrude outwards from the grout stopping holes under the action of external force, and the grout stopping sleeves protruding in adjacent grout stopping holes are in contact with each other.
Preferably, a pipe head is arranged at the upper end of the pipe body, the pipe head is connected with the pipe body through threads, and the pipe head is communicated with an output port of the grouting pump through a joint.
Preferably, the inner diameter of the tube head is smaller than the inner diameter of the tube body, the inner diameter of the tube head is equal to the inner diameter of the slurry stopping sleeve, and the upper end of the slurry stopping sleeve is positioned between the lower surface of the tube head and the upper surface of the tube body.
Preferably, a cavity is formed in the slurry stopping sleeve, liquid is filled in the cavity, the liquid is any one of water and hydraulic oil, and the cavity is opposite to a region on the pipe body, in which slurry stopping holes are formed.
Preferably, a communication hole is formed in the slurry stopping sleeve, the communication hole is connected with a cavity formed in the slurry stopping sleeve, and an outlet at the upper end of the communication hole is positioned on the upper surface of the slurry stopping sleeve;
The lower surface of the pipe head is provided with an annular groove, the annular groove is opposite to the communicating hole and communicated with the communicating hole, the pipe head is provided with a communicating pipe, and the communicating pipe is communicated with the annular groove.
Preferably, the lower surface of the pipe body is provided with a discharge hole which is communicated with the bottom of the slot, and a slurry stopping filler is filled between the bottom of the slurry stopping sleeve and the bottom of the slot;
the inside of discharge port installs the separation blade that has elasticity, the separation blade symmetry is installed inside the discharge port, the inside of separation blade has embedded the steel wire, the steel wire is used for changing the elasticity size of separation blade.
Preferably, the thickness of the side wall of the cavity close to one end of the grouting head is smaller than that of the side wall of the cavity far away from the grouting head.
Preferably, the outer wall of the slurry stopping sleeve is provided with a bulge, the cross section of the bulge is triangular, and the bulge is positioned in the area where the cavity on the slurry stopping sleeve is positioned.
The beneficial effects of the invention are as follows:
1. According to the goaf filling grouting equipment, the grout stopping holes and the grout stopping sleeves are arranged, in the grouting process, the grout stopping sleeves are extruded out of the grout stopping holes by using the pressure of the grout, the drilled holes are plugged, the condition that the grout stopping sleeves are damaged due to abrasion and deformation and cannot plug the drilled holes due to the fact that the grout stopping sleeves are connected to the inner walls of the drilled holes in the process of inserting grouting pipes into the drilled holes is avoided, and the plugging effect on the drilled holes in grouting is effectively guaranteed.
2. According to the goaf filling grouting equipment, the discharge hole, the baffle plate, the slot and the grouting filler are arranged, after grouting is finished, the pressure of the pipe body is raised to the second pressure, so that the grouting filler is discharged into the drill hole, water in the grouting liquid is absorbed by the grouting filler to expand and coagulate, the part of the drill hole, which is positioned at the lower end of the grouting pipe, is sealed, and therefore the drill hole is continuously sealed after the grouting pipe is taken out from the drill hole, the grouting liquid in the drill hole is prevented from flowing back, pressure is relieved, and grouting effect and filling effect are affected.
Drawings
The invention is further described below with reference to the accompanying drawings.
FIG. 1 is a front view of a grouting apparatus of the present invention;
FIG. 2 is a partial cross-sectional view of the grouting apparatus of the present invention;
FIG. 3 is an enlarged view of a portion of FIG. 2 at A;
FIG. 4 is an enlarged view of a portion of FIG. 2 at B;
FIG. 5 is an enlarged view of a portion of FIG. 2 at C;
The pipe comprises a pipe body 1, a slurry stopping hole 11, a discharge hole 12, a baffle plate 121, a slot 13, a pipe head 2, a pipe head 21, a communicating pipe 211, a ring groove 3, a joint 4, a slurry injecting head 5, a slurry stopping sleeve 51, a cavity 52, a communicating hole 53, a bulge 6 and a slurry stopping filler.
Detailed Description
The invention is further described in connection with the following detailed description in order to make the technical means, the creation characteristics, the achievement of the purpose and the effect of the invention easy to understand.
As shown in fig. 1 to 5, the goaf filling grouting equipment of the present invention comprises a grouting pump and a grouting pipe, wherein the grouting pipe is communicated with an output port of the grouting pump, and the grouting pipe comprises:
the grouting device comprises a pipe body 1, wherein the pipe body 1 is communicated with an output port of a grouting pump, and the lower end of the pipe body 1 is connected with a grouting head 4 through threads;
the grout stopping sleeve 5 is sleeved and mounted in the pipe body 1, the grout stopping sleeve 5 is made of elastic rubber materials, a slot 13 is formed in the lower portion in the pipe body 1, and the lower end of the grout stopping sleeve 5 is inserted into the slot 13;
The side wall of the pipe body 1 is provided with slurry stopping holes 11, the slurry stopping holes 11 are spirally distributed on the side wall of the pipe body 1, and the projection of the slurry stopping holes 11 on a horizontal plane is a complete circle, wherein the slurry stopping holes 11 are in any one of L shape, T shape, arc shape and rectangle;
The grout stopping sleeves 5 protrude outwards from the grout stopping holes 11 under the action of external force, and the grout stopping sleeves 5 protruding in adjacent grout stopping holes 11 are contacted with each other;
When filling the goaf through grouting, the grouting pipe is inserted into the drilled hole, then the prepared slurry is conveyed into the grouting pipe through the grouting pump, and then the slurry is conveyed into the region to be grouting in the drilled hole from the grouting head 4 of the grouting pipe, meanwhile, in the grouting process, when the slurry is conveyed into the grouting pipe, the slurry generates pressure on the slurry stopping sleeve 5 in the pipe body 1 of the grouting pipe, so that the slurry stopping sleeve 5 made of elastic rubber material is deformed, and then protrudes out of the pipe body 1 from the slurry stopping hole 11 formed in the pipe body 1 and contacts the inner wall of the drilled hole, meanwhile, as the projection of the slurry stopping hole 11 on the horizontal plane is in a complete circle shape, and the slurry stopping sleeves 5 protruding in the adjacent slurry stopping holes 11 are contacted with each other, the slurry stopping sleeve 5 protruding out of the pipe body 1 under the pressure of the slurry is effective in stopping the grouting, the gap between the drill hole and the grouting pipe is plugged, the situation that the plugging of the drill hole is not tight is avoided, the slurry in the drill hole flows back, the grouting effect and the filling treatment effect are affected, meanwhile, the plugging effect on the grouting hole is further improved by arranging a plurality of groups of areas provided with the grouting holes 11 in the length direction of the pipe body 1, the arranged plurality of groups of areas provided with the grouting holes 11 generate the effects of multistage plugging and staged depressurization, the effect of preventing the grouting from returning is further achieved, in the actual use process, a pipeline is not required to be arranged solely for enabling the grouting sleeve 5 to be pressed and protruded, the use is convenient, meanwhile, after the grouting is completed, the operation of the grouting pump is stopped, the pressure of the slurry in the pipe body 1 to the grouting sleeve 5 is reduced, the grouting sleeve 5 is retracted from the grouting holes 11 under the action of self elastic force and reenters the inside the pipe body 1, then, the pipe body 1 is extracted from the drill hole by using special equipment for later use, and in the process of taking out the grouting pipe from the drill hole, as the grouting stopping sleeve 5 is retracted into the pipe body 1, the pipe body 1 of the grouting stopping pipe is not easy to contact with the inner wall of the drill hole, the friction force between the pipe body 1 and the inner wall of the drill hole is reduced, the possibility that the pipe body 1 is blocked in the drill hole in the process of taking out the grouting stopping pipe is avoided, and the grouting pipe is convenient to disassemble after grouting is finished;
Meanwhile, as the grout stopping sleeve 5 is positioned in the pipe body 1 in the initial state, the grout stopping sleeve 5 cannot contact the inside of the drill hole in the process of inserting the grouting pipe into the drill hole, namely, the grout stopping sleeve 5 cannot be worn and deformed to be damaged in the installation process of the grout stopping pipe, so that the condition that the drill hole cannot be blocked is caused, and the blocking effect on the drill hole in grouting is effectively guaranteed.
As one embodiment of the invention, a pipe head 2 is arranged at the upper end of the pipe body 1, the pipe head 2 is connected with the pipe body 1 through threads, and the pipe head 2 is communicated with an output port of a grouting pump through a joint 3;
In the use, insert body 1 in the drilling of seting up earlier, afterwards, will be connected to the tube head 2 on the slip casting pump delivery outlet through joint 3 and install on body 1, thereby make things convenient for slip casting pipe's installation, avoid receiving the influence of the pipeline of carrying the oar liquid in slip casting pipe installation, simultaneously, after the slip casting is accomplished, if the outer thick liquid that ends of protrusion outside body 1 is influenced by the oar liquid in the drilling or the protruding thick liquid that ends cover 5 card is gone into in the groove on the drilling inner wall, the gap, lead to ending thick liquid cover 5 can not easily, when retrieving body 1 by oneself, the staff takes tube head 2 off body 1, afterwards, use professional equipment/anchor clamps to carry out the pulling to end thick liquid cover 5 from body 1 inside, promote to end thick liquid cover 5 to be bulged into body 1 outside part, end thick liquid cover 5 to be bulged outside body 1 after whole or most retrieve into body 1 again, take out body 1 from the drilling, in order to reduce body 1 and take out from well and avoid the follow-up the damage of body 1.
As one embodiment of the present invention, the inner diameter of the pipe head 2 is smaller than the inner diameter of the pipe body 1, the inner diameter of the pipe head 2 is equal to the inner diameter of the grout stop sleeve 5, and the upper end of the grout stop sleeve 5 is positioned between the lower surface of the pipe head 2 and the upper surface of the pipe body 1;
In the use, after tube head 2 passes through the screw thread and installs body 1 upper end, the upper end that is located the grout stop cover 5 of body 1 is compressed tightly to the upper surface of body 1 by the lower surface of tube head 2 to with the relative position of grout stop cover 5 in body 1 fixed, avoid the grout stop cover 5 takes place to remove in body 1 when the slip casting, influence the normal clear of slip casting, simultaneously, compress tightly the upper end of grout stop cover 5 to the upper surface of body 1 through tube head 2, can make the space between upper end and the body 1 of grout stop cover 5 sealed, avoid in the slip casting in-process, the grout is from the infiltration in the space between upper end and the body 1 of grout stop cover 5, influence the protrusion of grout stop cover 5 under the grout pressure, make grouting effect and filling administer the effect not good.
As an embodiment of the present invention, a cavity 51 is formed in the grout stop sleeve 5, the cavity 51 is filled with a liquid, the liquid is any one of water and hydraulic oil, and the cavity 51 is opposite to a region of the pipe body 1 where the grout stop hole 11 is formed;
Through injecting liquid in the cavity 51 in the grout stopping sleeve 5 for grout stopping sleeve 5 is when receiving the thick liquid extrusion in the body 1, more easily takes place to warp, makes grout stopping sleeve 5 bulge outside from the grout stopping hole 11 of seting up on the body 1, seals the drilling, prevents that the thick liquid backward flow from appearing, simultaneously, sets up cavity 51 and fills liquid, and the grouting pump stops working more easily after accomplishing the slip casting, and when the thick liquid pressure in the body 1 reduces, through the effect of the liquid as the transmission medium, promotes convex grout stopping sleeve 5 to retrieve in the body 1, and, utilize the liquid of packing as the transmission medium, also can effectually spread the effort of thick liquid to grout stopping sleeve 5 and act on the inner wall of drilling, avoid grout stopping sleeve 5 to receive too big pressure, lead to grout stopping sleeve 5 to appear damaging, influence follow-up use.
As an embodiment of the present invention, a communication hole 52 is formed in the grout stop sleeve 5, the communication hole 52 is connected with a cavity 51 formed in the grout stop sleeve 5, and an outlet at the upper end of the communication hole 52 is positioned on the upper surface of the grout stop sleeve 5;
A ring groove 211 is formed in the lower surface of the pipe head 2, the ring groove 211 is opposite to the communication hole 52 and communicated with each other, a communication pipe 21 is mounted on the pipe head 2, and the communication pipe 21 is communicated with the ring groove 211;
When the grouting pipe is stored, the grouting sleeve 5 in the pipe body 1 is taken out and stored separately, so that the grouting sleeve 5 in the pipe body 1 is prevented from aging during long-time storage to influence the use of the grouting pipe, and meanwhile, when the grouting sleeve 5 is stored separately, the liquid in the cavity 51 is discharged or pumped out through the communication hole 52, so that the grouting sleeve 5 is prevented from being damaged during long-time storage of the liquid in the cavity 51;
When the pipe body 1 is inserted into the drill hole, and then the grout stopping sleeve 5 is placed in the pipe body 1, the cavity 51 in the grout stopping sleeve 5 is not filled with liquid in advance, so that the grout stopping sleeve 5 becomes hard and straight after the cavity 51 is filled with liquid, and the movement and the installation of the grout stopping sleeve 5 are inconvenient;
After grouting is completed, liquid in the cavity 51 is pumped out through the communicating pipe 21, so that the cavity 51 is in a negative pressure state, the part, protruding to the outside of the pipe body 1, of the grouting sleeve 5 is further promoted to be retracted into the pipe body 1, and the grouting pipe is conveniently taken out.
As one embodiment of the invention, the lower surface of the pipe body 1 is provided with a discharge hole 12, the discharge hole 12 is communicated with the bottom of a slot 13, and a slurry stopping filler 6 is filled between the bottom of the slurry stopping sleeve 5 and the bottom of the slot 13, wherein the slurry stopping filler 6 is a small rubber ball wrapped with high polymer water absorbent resin and quick setting cement, and the surface of the small rubber ball is provided with micropores;
A baffle plate 121 with elasticity is arranged in the discharge hole 12, the baffle plate 121 is symmetrically arranged in the discharge hole 12, steel wires are embedded in the baffle plate 121, and the steel wires are used for changing the elasticity of the baffle plate 121;
during normal grouting, the pressure of the slurry in the pipe body 1 to the slurry stopping sleeve 5 is the first pressure, under the first pressure, the slurry stopping sleeve 5 protrudes out of the pipe body 1 from the slurry stopping hole 11, but the pressure of the slurry stopping sleeve 5 to the slurry stopping filler 6 at the bottom of the slot 13 is smaller than the acting force required by elastic deformation of the flange, so that the baffle plate 121 cannot be squeezed out, and the slurry stopping filler 6 at the bottom of the slot 13 is discharged from the discharge hole 12 to a grouting area in a drill hole;
After grouting is completed, the grouting pump increases grouting pressure, the pressure of the slurry in the pipe body 1 to the grouting sleeve 5 is the second pressure, at the moment, the second pressure is obviously larger than the first pressure, under the second pressure, the pressure of the grouting sleeve 5 to the grouting filler 6 at the bottom of the slot 13 is larger than the acting force required by elastic deformation of the flange, the baffle plate 121 is squeezed out, the grouting filler 6 at the bottom of the slot 13 is discharged from the discharge hole 12 to a grouting area in a drill hole, after the grouting filler 6 is discharged, the grouting filler 6 absorbs moisture in the grouting filler, expansion and condensation rapidly occur, so that the part of the drill hole at the lower end of the grouting pipe is closed, and after the grouting pipe is taken out from the drill hole, the drill hole is not plugged any more, so that the grouting filler 6 injected into the drill hole is decompressed, the grouting filler is caused to flow back, and the grouting effect and the filling effect are affected;
meanwhile, in the practical use process, when the condition allows, an external electric pump or a manual pump can be connected to the communicating pipe 21 again after grouting is completed, and the pressure of the slurry in the pipe body 1 to the grouting sleeve 5 is changed to be the second pressure by continuously injecting the liquid into the cavity 51, rather than the second pressure by increasing the grouting pressure of the grouting pump.
As one embodiment of the present invention, the thickness of the side wall of the cavity 51 near the end of the grouting head 4 is smaller than the thickness of the side wall of the cavity 51 far away from the grouting head 4;
when grouting, the grouting sleeve 5 in the cavity 51 close to the grouting head 4 is firstly expanded, and the grouting sleeve 5 at the position far away from the grouting head 4 is expanded, and meanwhile, the grouting sleeve 5 at the position with thinner side wall in the cavity 51 is used for fully filling the drilling holes, so that the plugging effect on the drilling holes is improved;
In addition, when grouting, the slurry produces reaction force to the grouting pipe, so that the grouting pipe tends to back up towards the outside of the drilling hole, the side wall of the cavity 51 far away from the grouting head 4 is thicker, after the grouting sleeve 5 protrudes out of the pipe body 1, the acting force between the grouting sleeve 5 and the inner wall of the drilling hole can be improved, the fixing effect of the grouting pipe is improved, the possibility of backing up of the grouting pipe is reduced, meanwhile, the thicker side wall of the cavity 51 is close to the outlet direction of the drilling hole, when the grouting pipe is subjected to reaction force, and the backing up tends to occur, the side wall of the grouting sleeve 5 can bear larger friction force, so that the damage of the grouting sleeve 5 is avoided under the condition of ensuring full adhesion to the grouting hole and preventing leakage, and the service life of the grouting sleeve 5 is prolonged.
As an embodiment of the present invention, a protrusion 53 is provided on the outer wall of the grout stop sleeve 5, the cross section of the protrusion 53 is triangular, and the protrusion 53 is located in the area of the cavity 51 on the grout stop sleeve 5;
In the use, when the grout stopping sleeve 5 protrudes to the outside of the pipe body 1 and contacts the inner wall of the drill hole, the bulge 53 on the outer wall of the grout stopping sleeve 5 can increase the contact area of the grout stopping sleeve 5 protruding to the outside of the pipe body 1 and the inner wall of the drill hole, and increase the friction force between the grout stopping sleeve 5 and the inner wall of the drill hole, so that when the grouting slurry generates reaction force to the grouting pipe, the grouting pipe is prevented from reversing under the reaction force, the grouting pipe moves in the drill hole, and the grouting effect and the filling effect are influenced.
The foregoing has shown and described the basic principles, principal features and advantages of the invention. It will be understood by those skilled in the art that the present invention is not limited to the embodiments described above, and that the above embodiments and descriptions are merely illustrative of the principles of the present invention, and various changes and modifications may be made without departing from the spirit and scope of the invention, which is defined in the appended claims. The scope of the invention is defined by the appended claims and equivalents thereof.
Claims (3)
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202210959807.2A CN115263413B (en) | 2022-08-11 | 2022-08-11 | A kind of goaf filling grouting equipment |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202210959807.2A CN115263413B (en) | 2022-08-11 | 2022-08-11 | A kind of goaf filling grouting equipment |
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| Publication Number | Publication Date |
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| CN115263413A CN115263413A (en) | 2022-11-01 |
| CN115263413B true CN115263413B (en) | 2025-07-08 |
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| CN202210959807.2A Active CN115263413B (en) | 2022-08-11 | 2022-08-11 | A kind of goaf filling grouting equipment |
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Citations (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN109209483A (en) * | 2018-10-11 | 2019-01-15 | 徐州中国矿大岩土工程新技术发展有限公司 | A kind of goaf grouting method and grouting device |
Family Cites Families (10)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101135244A (en) * | 2007-09-14 | 2008-03-05 | 枣庄速达机电工程公司 | Grout stopping plug |
| KR101976622B1 (en) * | 2018-08-31 | 2019-05-09 | 정덕교 | Grout injection system without internal closure by injection material |
| CN208950639U (en) * | 2018-10-11 | 2019-06-07 | 徐州中国矿大岩土工程新技术发展有限公司 | Goaf sizing device |
| CN109209482B (en) * | 2018-10-11 | 2024-06-21 | 徐州中矿岩土技术股份有限公司 | Goaf grouting method and grouting device |
| CN110425004B (en) * | 2019-08-16 | 2024-06-28 | 徐州中矿岩土技术股份有限公司 | Suspension type guide device for paste filling underwater goaf and construction method |
| CN110439611B (en) * | 2019-09-02 | 2024-12-31 | 徐州中矿岩土技术股份有限公司 | Assembled slurry storage device for filling underwater deep confined space and assembly method thereof |
| CN215444137U (en) * | 2021-03-29 | 2022-01-07 | 宜昌明珠磷化工业有限公司 | Goaf grouting filling treatment grout stopping plug device |
| CN214883579U (en) * | 2021-04-13 | 2021-11-26 | 天津珈知源科技有限公司 | Device for grouting of engineering boreholes |
| CN114108609B (en) * | 2021-09-29 | 2023-03-10 | 华北水利水电大学 | A construction method for multi-stage and segmental precise filling deep piles in goaf |
| CN114592510B (en) * | 2022-03-11 | 2024-02-20 | 深圳市工勘岩土集团有限公司 | Construction method for elastic partition of free section and anchoring section |
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Patent Citations (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN109209483A (en) * | 2018-10-11 | 2019-01-15 | 徐州中国矿大岩土工程新技术发展有限公司 | A kind of goaf grouting method and grouting device |
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