CN113137271A - Flexible cutting anti-blocking and bottom anti-friction integrated device for mine filling vertical drilling - Google Patents
Flexible cutting anti-blocking and bottom anti-friction integrated device for mine filling vertical drilling Download PDFInfo
- Publication number
- CN113137271A CN113137271A CN202110410644.8A CN202110410644A CN113137271A CN 113137271 A CN113137271 A CN 113137271A CN 202110410644 A CN202110410644 A CN 202110410644A CN 113137271 A CN113137271 A CN 113137271A
- Authority
- CN
- China
- Prior art keywords
- filling
- wire rope
- kettle
- steel wire
- pipeline
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Pending
Links
- 238000005553 drilling Methods 0.000 title claims abstract description 20
- 238000005520 cutting process Methods 0.000 title claims abstract description 15
- 229910000831 Steel Inorganic materials 0.000 claims abstract description 64
- 239000010959 steel Substances 0.000 claims abstract description 64
- 230000003139 buffering effect Effects 0.000 claims abstract description 25
- 239000000463 material Substances 0.000 claims description 25
- 238000000034 method Methods 0.000 claims description 13
- 239000002002 slurry Substances 0.000 claims description 12
- 238000005299 abrasion Methods 0.000 claims description 6
- 238000005260 corrosion Methods 0.000 claims description 5
- 230000007797 corrosion Effects 0.000 claims description 5
- 239000000126 substance Substances 0.000 claims description 5
- 238000004804 winding Methods 0.000 claims description 5
- 230000000903 blocking effect Effects 0.000 claims description 4
- 229910001335 Galvanized steel Inorganic materials 0.000 claims description 3
- 239000008397 galvanized steel Substances 0.000 claims description 3
- 238000010276 construction Methods 0.000 abstract description 2
- 238000005065 mining Methods 0.000 description 5
- XEEYBQQBJWHFJM-UHFFFAOYSA-N Iron Chemical compound [Fe] XEEYBQQBJWHFJM-UHFFFAOYSA-N 0.000 description 2
- 238000004519 manufacturing process Methods 0.000 description 2
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 description 2
- HCHKCACWOHOZIP-UHFFFAOYSA-N Zinc Chemical compound [Zn] HCHKCACWOHOZIP-UHFFFAOYSA-N 0.000 description 1
- 230000009286 beneficial effect Effects 0.000 description 1
- 239000011362 coarse particle Substances 0.000 description 1
- 239000011248 coating agent Substances 0.000 description 1
- 238000000576 coating method Methods 0.000 description 1
- 238000004880 explosion Methods 0.000 description 1
- 239000000945 filler Substances 0.000 description 1
- 230000005484 gravity Effects 0.000 description 1
- 239000012535 impurity Substances 0.000 description 1
- 229910052742 iron Inorganic materials 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
- 238000002360 preparation method Methods 0.000 description 1
- 238000005086 pumping Methods 0.000 description 1
- 238000007789 sealing Methods 0.000 description 1
- 238000005204 segregation Methods 0.000 description 1
- 238000005406 washing Methods 0.000 description 1
- 239000002699 waste material Substances 0.000 description 1
- 239000011701 zinc Substances 0.000 description 1
- 229910052725 zinc Inorganic materials 0.000 description 1
Images
Classifications
-
- 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
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)
- Excavating Of Shafts Or Tunnels (AREA)
Abstract
The invention provides a flexible cutting anti-blocking and bottom anti-friction integrated device for a mine filling vertical drilling hole, and belongs to the technical field of mine filling. The device is the aboveground part including the pipeline tee bend, wire rope, the blind plate, hoist engine and filling tube, the part is including buffering the kettle in the pit, buffering kettle high pressure access hole, the access hole blind plate, the steel sheet, bolt and filling tube, arrange the hoist engine on ground, fill a pipeline tee bend of drilling connection, one section is as filling the inlet pipe, one section is as wire rope's passageway, wire rope twines in the cylinder of hoist engine, the rope body is arranged in and is filled vertical drilling, the rope end is fixed on the access hole blind plate, arrange the buffering kettle in the pit, perpendicular filling hole is connected at buffering kettle top, the high pressure access hole is arranged to the side, seal with the blind plate, buffering kettle opposite side is connected with horizontal filling pipe, the pre-buried steel sheet in tunnel bottom, will cushion the kettle through the bolt and fix at tunnel bottom plate. The device has the advantages of small construction amount, high efficiency, high safety and convenient operation.
Description
Technical Field
The invention relates to the technical field of mine filling, in particular to a flexible cutting anti-blocking and bottom anti-friction integrated device for a mine filling vertical drilling hole.
Background
With the depletion of surface resources and the increase of mining depth, the application proportion of the filling mining method in mines gradually rises in order to solve the problems of goaf, high ground pressure and large amount of tailings in the mining process. The filling method mixes the generated tailings, the cementing material, the coarse aggregate, water and the like according to a certain proportion to form the filling material with certain fluidity. The filling material is conveyed to the goaf through a pipeline system in a plug flow mode under the action of an external force or gravity, and filling operation is completed. The filling material has certain strength after being maintained, and can better control the collapse and the ground pressure of the goaf. Meanwhile, the filling mining method treats a large amount of tailings, reduces the degree of dependence on a tailing pond, and reduces land acquisition, construction cost and damage to the environment of the tailing pond.
In whole filling system, pipeline transportation system is one of comparatively weak link, produces pipe explosion, stifled pipe and wearing and tearing scheduling problem easily, and wherein stifled pipe is main, common problem, and pipeline transportation system takes place to block up and can cause great economic loss, also can influence mine safety in production simultaneously.
The reasons for pipe blockage in a filled pipe system are as follows: first, pipe leakage causes some fine slurry to leak out, causing pipe resistance to rise, resulting in pipe blockage. Secondly, the filler preparation is too thick, increasing the delivery resistance and causing pipe blockage. Thirdly, slurry concentration is low to a certain degree, which causes slurry segregation and coarse particles deposit in the pipeline to cause pipe blockage. Fourthly, foreign matters are mixed into the filling pipeline, and if the impurities cannot be screened completely or the lining of the pipeline falls off, the pipeline is blocked. At present, the problem of pipeline blockage is treated by methods such as pumping pressure water washing, pipeline disassembly and the like. Because the pipe plugging part is difficult to determine, the workload of pipeline disassembly is large, the dredging is difficult, and the mine production is seriously influenced.
Disclosure of Invention
The invention aims to solve the technical problem of providing a flexible cutting anti-blocking and bottom anti-abrasion integrated device for a mine filling vertical drilling hole, and solving the problem of conveying faults caused by foreign matters or filling materials in the drilling hole.
The device comprises an aboveground part and an underground part, wherein the aboveground part comprises a pipeline tee joint, a steel wire rope, a blind plate, a winch and a filling pipe I, the underground part comprises a buffer kettle, a buffer kettle high-pressure access hole, an access hole blind plate, a steel plate, a bolt and a filling pipe II, the winch is arranged on the ground and used for providing force for stretching the steel wire rope so as to dredge the pipeline, the filling drill hole is connected with the pipeline tee joint, one end of the pipeline tee joint is used as a filling feeding pipe and is connected with the filling pipe I, the other end of the pipeline tee joint is used as a channel of the steel wire rope, the blind plate is covered on the channel, the steel wire rope is wound in a roller of the aboveground winch, a rope body is arranged in a vertical filling drill hole, the tail end of the rope is fixed on the access hole blind plate of the buffer kettle high-pressure access hole, a buffer kettle is arranged underground, the top of the buffer kettle is connected with the vertical filling drill hole, the buffer kettle high-pressure access hole is arranged on the side surface, the buffer kettle is sealed by the access hole blind plate, when the buffering kettle needs to be overhauled, the buffering kettle can be disassembled, the other side surface of the buffering kettle is provided with a pipeline opening which is connected with a horizontal filling pipe two phase, a steel plate is embedded at the bottom of the roadway, and the buffering kettle is fixed on a bottom plate of the roadway through bolts.
A round small opening is formed in the blind plate above the pipeline tee joint and used for a steel wire rope to pass through, and the diameter of the small opening is larger than that of the steel wire rope.
Selecting a steel wire rope with the diameter of 10-30 mm according to the friction force generated by the contact of the steel wire rope and the filling material and the self weight of the steel wire rope, and adopting a steel wire rope with wear resistance and chemical corrosion resistance, wherein the wear resistance and chemical corrosion resistance of slurry are reduced by adopting a galvanized steel wire rope generally; the steel wire rope is reserved for 2-5m and placed at the bottom of the buffer kettle.
The steel wire rope type selection is carried out according to the viscous force generated by the steel wire rope and the filling material and the diameter of the filling pipeline, so that the steel wire rope type selection can be ensured to have certain strength to meet the requirement that the steel wire rope is pulled to dredge the pipeline when slurry is solidified, and meanwhile, the influence of the steel wire rope on the flow of the slurry in the pipeline is reduced.
The diameter of the inner wall of the buffering kettle is 1.5-3 times of that of the inner wall of the filling pipe, the buffering kettle is cylindrical, the bottom of the buffering kettle is provided with a through hole, and the buffering kettle is used for reducing impact force of filling materials on a joint of the vertical pipeline and the horizontal pipeline and reducing pipeline abrasion.
The steel wire rope swings in the contact process with the filling materials to prevent the filling materials from blocking the pipe, and if a pipe blocking accident happens, the winding drum is controlled by the winch to pull the steel wire rope upwards, and the pipeline is dredged under the action of the reciprocating cutting force between the steel wire rope and the filling materials.
The technical scheme of the invention has the following beneficial effects: (1) the universality is high. The whole device is attached to the existing filling drill hole, the existing filling drill hole structure is not changed, all filling mines with drill holes can be used, and the device is simple and convenient to install; (2) the cost is low. The device consists of common winches and steel wire ropes in mines, and the cost is not high no matter related facilities are newly purchased or the mine is used as waste; (3) the safety is high. The diameter of the steel wire rope is calculated scientifically based on friction force and self weight, the safety of the device is good, compared with the traditional methods of pipeline disassembly, drill dredging and the like, the method is used for dredging the drilled hole by controlling the winch, and the damage of instantaneous impact to constructors caused by insufficient dredging of the pipeline due to slurry discharge is avoided when the personnel are on the ground surface in the whole operation process.
Drawings
FIG. 1 is a front view of the flexible cutting anti-blocking and bottom anti-friction integrated device for vertical drilling of the invention;
FIG. 2 is a side view of a downhole assembly of the present invention.
Wherein: 1-pipeline tee joint, 2-steel wire rope, 3-blind plate, 4-winch, 5-buffer kettle, 6-buffer kettle high-pressure access hole, 7-access hole blind plate, 8-steel plate, 9-bolt, 10-filling pipe I and 11-filling pipe II.
Detailed Description
In order to make the technical problems, technical solutions and advantages of the present invention more apparent, the following detailed description is given with reference to the accompanying drawings and specific embodiments.
The invention provides a flexible cutting anti-blocking and bottom anti-friction integrated device for a mine filling vertical drilling hole.
As shown in figure 1, the device comprises an aboveground part and an underground part, wherein the aboveground part comprises a pipeline tee joint 1, a steel wire rope 2, a blind plate 3, a winch 4 and a filling pipe I10, the underground part comprises a buffer kettle 5, a buffer kettle high-pressure access hole 6, an access hole blind plate 7, a steel plate 8, a bolt 9 and a filling pipe II 11, the winch 4 is arranged on the ground and used for providing the force for stretching the steel wire rope, the pipeline is dredged, a filling drill hole is connected with the pipeline tee joint 1, one end of the pipeline tee joint 1 is used as a filling feeding pipe and is connected with the filling pipe I10, the other end of the pipeline tee joint is used as a channel of the steel wire rope 2, the blind plate 3 is covered on the channel, the steel wire rope 2 is wound in a roller of the aboveground winch 4, the rope body is arranged in a vertical filling drill hole, the tail end of the rope is fixed on the access hole blind plate 7 of the buffer kettle high-pressure access hole 6, the buffer kettle 5 is arranged underground, as shown in figure 2, the top of the buffer kettle 5 is connected with the vertical filling drill hole, a buffering kettle high-pressure access hole 6 is arranged on the side face of the buffering kettle 5 and is sealed by an access hole blind plate 7, a pipeline opening is formed in the other side face of the buffering kettle 5 and is connected with a horizontal filling pipe II 11, a steel plate 8 is embedded at the bottom of the roadway, and the buffering kettle 5 is fixed on a roadway bottom plate through a bolt 9.
A round small opening is formed in the blind plate 3 above the pipeline tee joint 1 and used for the steel wire rope 2 to pass through, and the diameter of the small opening is larger than that of the steel wire rope 2. The blind plate is used for sealing the three passages of the pipeline, and only one small opening is reserved for the steel wire rope to pass through.
The diameter of the steel wire rope 2 is 10mm-30mm according to the stress and the self-gravity when the steel wire rope is in contact with the filling material, and the abrasion and the chemical corrosion of slurry are reduced by adopting a galvanized steel wire rope; the steel wire rope 2 is reserved with 2-5m and placed at the bottom of the buffer pot 6. The model selection is carried out according to the viscous force generated by the steel wire rope and the filling material and the diameter of the filling pipeline, so that the steel wire rope is pulled to dredge the pipeline when the slurry is solidified and certain strength is ensured, and meanwhile, the influence of the steel wire rope on the flow of the slurry in the pipeline is reduced.
The device is provided with the buffer kettle underground, and is used for reducing the impact force of the filling materials on the joint of the vertical pipeline and the horizontal pipeline and reducing the abrasion of the pipeline. The diameter of the inner wall of the buffer pot 5 is 1.5 to 3 times of the diameter of the inner wall of the filling pipe 10, the buffer pot 5 is cylindrical, and the bottom of the buffer pot is provided with a through hole.
The using method of the device comprises the following steps:
the filling material enters the vertical filling pipeline through the pipeline tee joint 1, flows into the buffer kettle 5 and then enters the transverse pipeline for transportation. The steel wire rope 2 swings in the contact process of the filling materials, so that the possibility of pipe blockage caused by the filling materials is reduced. If a pipe blockage accident occurs, the winding drum is controlled by the winding engine 4 to pull up the steel wire rope 2, and the pipeline is dredged under the action of the reciprocating cutting force between the steel wire rope 2 and the filling material.
The following description is given with reference to specific examples.
Example 1
The Anhui iron ore adopts a filling mining method, the filling material realizes the self-flow conveying by utilizing a natural pressure head in a vertical drilling hole, and the inner diameter of the vertical drilling hole is 150 mm. The filling pipeline is easy to produce the falling of the drill hole lining and the blockage of the drill hole, and finally leads to the blockage of the filling material. The mine adopts the filling vertical drilling pipe blockage preventing device, the horizontal port of the tee joint on the mine is used for conveying filling materials, and the vertical port is used for a steel wire rope to pass through. The steel wire rope channel is closed by a blind plate, and a small opening with the diameter of 30mm is opened. A steel wire rope with the diameter of 17.5mm is selected according to theoretical calculation, an A-level zinc coating is adopted, slurry abrasion and chemical corrosion are reduced, and an idle 5t tensile winch in a mine is utilized. The steel wire rope is 2.5m in excess underground and is directly placed at the bottom of the buffer kettle. The diameter of the buffering kettle is 500mm, a high-pressure access hole and a filling pipeline hole are respectively formed in the kettle side, the access hole is sealed by a blind plate, a steel wire rope is fixed on the access hole blind plate, and the buffering kettle is fixed on a roadway bottom plate by using bolts. If pipe blockage occurs, the steel wire rope is axially pulled through the winch on the well, so that the steel wire rope and the filling material are rubbed and cut, and the purpose of dredging the pipeline is fulfilled.
While the foregoing is directed to the preferred embodiment of the present invention, it will be understood by those skilled in the art that various changes and modifications may be made without departing from the spirit and scope of the invention as defined in the appended claims.
Claims (5)
1. The utility model provides a mine fills flexible cutting of vertical drilling and prevents stifled and bottom antifriction integrated device which characterized in that: the underground filling device comprises an aboveground part and an underground part, wherein the aboveground part comprises a pipeline tee joint (1), a steel wire rope (2), a blind plate (3), a winch (4) and a filling pipe I (10), the underground part comprises a buffer kettle (5), a buffer kettle high-pressure access hole (6), an access hole blind plate (7), a steel plate (8), a bolt (9) and a filling pipe II (11), the winch (4) is arranged on the ground, the filling drilling hole is connected with the pipeline tee joint (1), one end of the pipeline tee joint (1) serves as a filling inlet pipe and is connected with the filling pipe I (10), the other end of the pipeline tee joint serves as a channel of the steel wire rope (2), the blind plate (3) covers the channel, the steel wire rope (2) is wound in a roller of the aboveground winch (4), a rope body is arranged in the vertical filling drilling hole, the tail end of the rope is fixed on the access hole blind plate (7) of the buffer kettle high-pressure access hole (6), the buffer kettle is arranged underground, the vertical filling drill hole is connected at the top of the buffering kettle (5), the buffering kettle high-pressure access hole (6) is arranged on the side face of the buffering kettle (5), the buffering kettle high-pressure access hole (6) is sealed by an access hole blind plate (7), a pipeline opening is formed in the other side face of the buffering kettle (5) and is connected with a horizontal filling pipe II (11), a steel plate (8) is embedded in the bottom of the roadway, and the buffering kettle (5) is fixed on the bottom plate of the roadway through bolts (9).
2. The mine filling vertical drilling flexible cutting anti-blocking and bottom friction reducing integrated device according to claim 1, characterized in that: a round small opening is formed in the blind plate (3) above the pipeline tee joint (1) and used for a steel wire rope (2) to pass through, and the diameter of the small opening is larger than that of the steel wire rope (2).
3. The mine filling vertical drilling flexible cutting anti-blocking and bottom friction reducing integrated device according to claim 1, characterized in that: the diameter of the steel wire rope (2) is 10mm-30mm, and the abrasion and chemical corrosion of slurry are reduced by adopting a galvanized steel wire rope; the steel wire rope (2) is reserved for 2-5m and placed at the bottom of the buffer pot (6).
4. The mine filling vertical drilling flexible cutting anti-blocking and bottom friction reducing integrated device according to claim 1, characterized in that: the diameter of the inner wall of the buffer kettle (5) is 1.5-3 times of that of the inner wall of the filling pipe I (10), the buffer kettle (5) is cylindrical, and a through hole is formed in the bottom of the buffer kettle.
5. The mine filling vertical drilling flexible cutting anti-blocking and bottom friction reducing integrated device according to claim 1, characterized in that: the steel wire rope (2) swings in the contact process with the filling materials to prevent the filling materials from blocking pipes, if a pipe blocking accident happens, the winding drum is controlled by the winding drum (4) to pull the steel wire rope (2) upwards, and the pipeline is dredged under the action of the reciprocating cutting force between the steel wire rope (2) and the filling materials.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202110410644.8A CN113137271A (en) | 2021-04-14 | 2021-04-14 | Flexible cutting anti-blocking and bottom anti-friction integrated device for mine filling vertical drilling |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202110410644.8A CN113137271A (en) | 2021-04-14 | 2021-04-14 | Flexible cutting anti-blocking and bottom anti-friction integrated device for mine filling vertical drilling |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN113137271A true CN113137271A (en) | 2021-07-20 |
Family
ID=76813043
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202110410644.8A Pending CN113137271A (en) | 2021-04-14 | 2021-04-14 | Flexible cutting anti-blocking and bottom anti-friction integrated device for mine filling vertical drilling |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN113137271A (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN114776886A (en) * | 2022-05-17 | 2022-07-22 | 南京银茂铅锌矿业有限公司 | Method for replacing filling pipe in vertical steel sleeve |
Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104384160A (en) * | 2014-10-08 | 2015-03-04 | 中国矿业大学 | Device and method for cleaning vertical feeding pipe |
| CN105019522A (en) * | 2014-04-22 | 2015-11-04 | 吴广顺 | Sewer dredger |
| JP2019027133A (en) * | 2017-07-31 | 2019-02-21 | サントリーホールディングス株式会社 | Sanitation device and sanitation method in well pipe |
| CN210564652U (en) * | 2019-07-08 | 2020-05-19 | 山东黄金归来庄矿业有限公司 | Underground mine filling buffer |
-
2021
- 2021-04-14 CN CN202110410644.8A patent/CN113137271A/en active Pending
Patent Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN105019522A (en) * | 2014-04-22 | 2015-11-04 | 吴广顺 | Sewer dredger |
| CN104384160A (en) * | 2014-10-08 | 2015-03-04 | 中国矿业大学 | Device and method for cleaning vertical feeding pipe |
| JP2019027133A (en) * | 2017-07-31 | 2019-02-21 | サントリーホールディングス株式会社 | Sanitation device and sanitation method in well pipe |
| CN210564652U (en) * | 2019-07-08 | 2020-05-19 | 山东黄金归来庄矿业有限公司 | Underground mine filling buffer |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN114776886A (en) * | 2022-05-17 | 2022-07-22 | 南京银茂铅锌矿业有限公司 | Method for replacing filling pipe in vertical steel sleeve |
| CN114776886B (en) * | 2022-05-17 | 2023-10-03 | 南京银茂铅锌矿业有限公司 | Method for replacing filling pipe in vertical steel sleeve |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| CN105952475B (en) | A kind of residual exploiting field inbreak abandoned working grouting and reinforcing technology of coal mine and method | |
| CN109505639B (en) | Gob-side entry driving coal pillar reinforcing system and using method thereof | |
| CN207934931U (en) | A kind of energy dissipating decompressor and filling system | |
| CN109798140A (en) | Km Deep Soft Rock fracture grouting support reinforcement method | |
| CN113137271A (en) | Flexible cutting anti-blocking and bottom anti-friction integrated device for mine filling vertical drilling | |
| CN108868827A (en) | Km deep-well high-ground stress combination of steel rope injection hole sealing device and method for sealing | |
| CN104389634A (en) | Mine vertical shaft/sieve shaft well wall structure and controllable dewatering method thereof | |
| CN104564105B (en) | A kind of apparatus and method of two grades of sleeve pipes of seat earth grouting and reinforcing | |
| CN106522218A (en) | Cast-in-situ bored pile under-water concrete grouting steel conduct pipe | |
| CN111764959B (en) | Gas-liquid linkage high-concentration slurry grouting device and method for deep water-rich goaf | |
| CN201649099U (en) | Grout injector metal casting | |
| CN104534168B (en) | A kind of deep pipeline burying machine | |
| CN103321678B (en) | Gob filling device and gob filling method capable of prolonging service life of filling drilled hole | |
| CN213682114U (en) | Curtain grouting hole sealing replacement device | |
| CN114017107B (en) | Resistance-increasing pressure-relief system for filling slurry pipeline transportation and use method thereof | |
| CN206554106U (en) | Conehead muscle body posttension pile foundation | |
| CN213116341U (en) | Underground pressurized grouting water plugging soft and hard aggregate intermittent controllable filling device | |
| CN205627308U (en) | A high pressure buffering filter equipment for fill pipe network in pit | |
| CN101250989A (en) | Surface drilling down-hole sealing technique without unpackaging condition | |
| CN208845140U (en) | A kind of aggregate adding set applied to mine geological hazards | |
| CN110725683A (en) | Slurry circulation slag discharging system for shaft boring machine | |
| CN102498771A (en) | Salt drainage well with non-return function and construction method thereof | |
| CN209099968U (en) | A kind of pressure relief device that the brill of suitable underground 90 uses | |
| CN201032052Y (en) | Liquefied petroleum gas underground gas storage well | |
| CN214660339U (en) | Device for cleaning blockage of underground filling pipeline by filling and drilling |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| PB01 | Publication | ||
| PB01 | Publication | ||
| SE01 | Entry into force of request for substantive examination | ||
| SE01 | Entry into force of request for substantive examination | ||
| RJ01 | Rejection of invention patent application after publication |
Application publication date: 20210720 |
|
| RJ01 | Rejection of invention patent application after publication |