CN112879048A - Gob-side entry retaining wall construction system and method based on concrete 3D printing technology - Google Patents
Gob-side entry retaining wall construction system and method based on concrete 3D printing technology Download PDFInfo
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- CN112879048A CN112879048A CN202110265904.7A CN202110265904A CN112879048A CN 112879048 A CN112879048 A CN 112879048A CN 202110265904 A CN202110265904 A CN 202110265904A CN 112879048 A CN112879048 A CN 112879048A
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- E—FIXED CONSTRUCTIONS
- E21—EARTH DRILLING; MINING
- E21D—SHAFTS; TUNNELS; GALLERIES; LARGE UNDERGROUND CHAMBERS
- E21D11/00—Lining tunnels, galleries or other underground cavities, e.g. large underground chambers; Linings therefor; Making such linings in situ, e.g. by assembling
- E21D11/04—Lining with building materials
- E21D11/10—Lining with building materials with concrete cast in situ; Shuttering also lost shutterings, e.g. made of blocks, of metal plates or other equipment adapted therefor
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- E—FIXED CONSTRUCTIONS
- E21—EARTH 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
Abstract
The invention discloses a gob-side entry retaining wall construction system and method based on a concrete 3D printing technology, which are suitable for the entry retaining wall construction in a coal mine gob-side entry retaining technology. The system comprises a concrete 3D printing system arranged near a working face end entry retaining section and a material preparation system which is not far away from the printing system and is positioned in an entry retaining part; the concrete 3D printing system mainly comprises a near-end nozzle, a far-end nozzle and a top-contacting nozzle, wherein the nozzles can respectively construct a hard wall, a soft wall and a top-contacting wall which are arranged along the heading direction of a roadway, and are correspondingly connected with a hard wall material, a soft wall material and a top-contacting foaming material; the near-end nozzle and the far-end nozzle are connected with the bottom of the upper cross beam through the slide rail and can move along the slide rail, and the top-contacting nozzle is positioned at the end head of the upper cross beam. The automatic control system is high in automation degree, low in workload of constructors and friendly in operation environment.
Description
Technical Field
The invention relates to a gob-side entry retaining wall construction system and method based on a concrete 3D printing technology, which are particularly suitable for building and constructing an entry retaining wall in a gob-side entry retaining technology under a coal mine.
Background
The gob-side entry retaining is an important technology in coal mining, and the gob-side entry retaining refers to the maintenance of an original stoping roadway along the edge of a goaf behind the current working face. Most of gob-side entry retaining technologies need to construct an artificial wall along the edge of a gob, and the artificial wall plays an important role in blocking harmful gases, water, gangue and the like in the gob and also plays an important role in maintaining the stability of a roadway. From the stress distribution angle, the artificial wall body changes the original span-top law of the overlying roof plate, so that the upper part of the wall body bears larger stress, and the mine pressure display law of the maintained roadway is very important. Therefore, in general, the construction of an artificial wall requires a certain bearing capacity, and the top plate can be cut at a necessary timing while resisting the sinking deformation of the top plate; on the other hand, the flexible roof panel is required to have certain flexibility and correspondingly have certain deformation capacity under the condition of large roof panel deformation so as to adapt to the deformation of the roof panel.
At present, in actual engineering, the gob-side entry retaining has the defects of high working strength, more end operation machines, centralized personnel, poor operation environment and the like. After the stope face is pushed, the stability of the roadway wall plays a crucial role in controlling the roadway space, and after part of the section is deformed, the subsequent maintenance still needs to be manually carried out. In general, although gob-side entry retaining has many disadvantages with many advantages. The bottleneck for restricting the further development of the gob-side entry retaining technology is how to improve the automation level of the gob-side entry retaining technology, reduce the operation intensity, improve the performance of the wall body, reduce the number of operators and the like.
Disclosure of Invention
The technical problem is as follows: the invention aims to provide a gob-side entry retaining wall construction system and method based on a concrete 3D printing technology aiming at the defects of the prior art, and provides a technical means which is better in automation, low in personnel demand and friendly in operation environment in the aspect of gob-side entry retaining wall construction.
The technical scheme is as follows: in order to achieve the technical purpose, the gob-side entry retaining wall construction system based on the concrete 3D printing technology is characterized in that: the device comprises an extrusion system slide rail and a concrete 3D printing system which are arranged at a position where a roadway retaining wall needs to be constructed in a fully mechanized mining face, wherein the concrete 3D printing system comprises a material extrusion system and a material preparation system, the material extrusion system is arranged on the extrusion system slide rail through a driving wheel, the material preparation system is arranged in a roadway retaining section, and the material preparation system is connected with the material extrusion system through an output pipeline;
the material extrusion system comprises an extrusion system base arranged on a slide rail along the extrusion system, the extrusion system base is provided with an upper cross beam which is transversely arranged through a stand column, the end part of the upper cross beam is provided with a top-contacting nozzle, a near-end nozzle connecting block and a far-end nozzle connecting block are respectively arranged below the upper cross beam, the slide rail is arranged below the upper cross beam, and the near-end nozzle connecting block and the far-end nozzle connecting block are slidably connected with the upper cross beam through the slide rail;
the material preparation system comprises a master control system, a hard wall construction material tank, a soft wall construction material tank, an additive tank, a raw material tank and a top-connected foaming material tank; the main control system is used for controlling the printing speed, the printing layer height and the nozzle extrusion speed of the material extrusion system by inputting the 3D printing model file parameters, the hard wall construction material tank, the soft wall construction material tank and the roof-connected foaming material tank are connected with the material extrusion system through output pipelines and supply materials, the hard wall construction material tank is further connected with the near-end nozzle through an output pipe and supplies materials, the soft wall construction material tank is further connected with the far-end nozzle through an output pipe and supplies materials, and the roof-connected foaming material tank is further connected with the roof-connected nozzle through an output pipe and supplies materials.
All output pipelines of the hard wall construction material tank, the soft wall construction material tank, the additive tank, the raw material tank and the roof-contacted foaming material tank are bundled to form a material conveying integration and are connected with the extrusion system base.
The lower part of the near-end nozzle connecting block is connected with a near-end nozzle through a near-end nozzle large-diameter adapter and a near-end nozzle small-diameter adapter which are used for controlling the material outflow speed in sequence; and a far-end nozzle large-diameter adapter nozzle and a far-end nozzle small-diameter adapter nozzle which are used for controlling the material outflow speed are sequentially connected with the far-end nozzle below the far-end nozzle connecting block.
The stand is equipped with the last auxiliary column of being connected with the entablature including setting up the lower head mast in extrusion system base top on the head mast down, goes up auxiliary column and passes through hydraulic coupling with head mast down, goes up auxiliary column slidable from top to bottom, goes up auxiliary column and is equipped with rotary mechanism down between the head mast to the auxiliary column can be used as the axle to carry out horizontal rotation above making the entablature.
The extrusion system sliding rail is connected with the rear end of a hydraulic support base arranged on the fully mechanized mining surface, and the extrusion system sliding rail can move forwards along with the hydraulic support in the forward moving process of the hydraulic support.
A working method of a gob-side entry retaining wall construction system based on a concrete 3D printing technology comprises the following steps:
a, connecting an extrusion system slide rail behind an end hydraulic support base close to the end of a working surface, arranging an extrusion system on the extrusion system slide rail, and arranging a material preparation system at a roadway retaining section;
b, connecting the material extrusion system with the material preparation system through material conveying integration, and checking the extrusion smoothness of a top connection nozzle, a near-end nozzle and a far-end nozzle of the material extrusion system;
c, filling the prepared hard wall construction material into a hard wall construction material tank, filling the soft wall construction material into a soft wall construction material tank, and then filling the top-connected foaming material into the top-connected foaming material tank to ensure the uniformity of material mixing in each tank body;
d, establishing a retained roadway 3D printing construction model by using a computer, comprehensively considering the factors of working face propulsion speed, geological structure and roof breakage pressure, decomposing a retained roadway wall into a plurality of equal-width constructed walls, wherein the constructed walls are formed by combining a soft wall and a hard wall, setting various 3D printing parameters including printing speed, printing layer height and nozzle extrusion speed, and then importing files recording corresponding data into a master control system; according to the imported document data, a main control system builds a soft wall body on the side close to a mining cavity by a far-end nozzle according to the preset requirements of the width and the height of the wall body at the rear of a stope face, the layer height is 5-10 cm, then a near-end nozzle is started to build a hard wall body on the side close to a roadway, the layer height is equal to 5-10 cm, finally, a wall body with the equal layer height is formed, the wall body is suitable for a top plate to rotate, hard resistance is avoided, and the buffer energy absorption effect is achieved;
the near-end nozzle and the far-end nozzle work circularly to finally form the whole wall. When the constructed wall body is close to the top plate, the top-contacting nozzle is started to spray the foaming material, so that the whole wall body is in close contact with the top plate;
in the wall body construction process, the upper cross beam rotates to realize wall body construction, the near-end nozzle and the far-end nozzle on the upper cross beam also reciprocate along the slide rail of the upper cross beam, and meanwhile, the extrusion system base also reciprocates on the extrusion system slide rail to ensure the printing effect.
And (4) checking the stability of the wall body at any time on the wall body section constructed at the rear part of the entry retaining, and performing remedial measures on the bad area in time.
Advantageous effects
Due to the adoption of the technical scheme, compared with the prior art, the invention has the following advantages:
1) the automation degree is high, and the personnel demand is few. By adopting the technical scheme, the filling bracket and the complex pipeline are avoided being arranged. The wall printing mode is changed according to the model established by the computer, and is relatively flexible. After the printing program is set, the requirement on manual intervention is low, and the number of the working people gathered at the end of the working face for developing tight entry retaining can be reduced.
2) The constructed wall body is composed of a soft wall body which is relatively soft and close to one side of the goaf and a hard wall body which is relatively hard and close to one side of the retained roadway, so that the whole wall body not only has the function of protecting the roadway when adapting to lateral rotary sinking of the rock above the goaf, but also has the effect of adapting to lateral rotary sinking of the rock through self deformation.
3) The economic cost is controllable, and the intelligent degree is high. Because the material adopted by the system is a relatively low-cost concrete material, the cost of consumable parts of the material extrusion system is relatively low, the G code program for controlling the operation of the nozzle, which is generated based on the exported stl file, is relatively open-source, flexible to modify and convenient to control the operation path and mechanism of the nozzle. Therefore, the method has relatively good economic applicability and conforms to the overall concept of intelligent mining.
Drawings
FIG. 1 is a schematic diagram of the position arrangement of a gob-side entry retaining wall construction system based on a concrete 3D printing technology;
FIG. 2 is a schematic diagram of the material extrusion system of the present invention;
FIG. 3 is a schematic diagram of a material preparation system according to the present invention.
In the figure: 1-non-mined coal, 2-goaf, 3-entry retaining wall, 4-entry retaining, 5-local section transportation gallery, 6-working face, 7-upper section goaf, 8-upper section entry retaining wall, 9-local section air return gallery, 10-lower section coal, 11-concrete 3D printing system, 12-material extrusion system, 13-material preparation system, 14-printing wall, 15-end hydraulic support;
12-1-upper beam, 12-2-upper auxiliary column, 12-3-near end nozzle connecting block, 12-4-far end nozzle connecting block, 12-5-near end nozzle large diameter transfer nozzle, 12-6-far end nozzle large diameter transfer nozzle, 12-7-near end nozzle small diameter transfer nozzle, 12-8-far end nozzle small diameter transfer nozzle, 12-9-near end nozzle, 12-10-far end nozzle, 12-11-lower main column, 12-12-extrusion system base, 12-13-extrusion system slide rail, 12-14-top connecting nozzle;
13-1-master control system, 13-2-hard wall construction material tank, 13-3-soft wall construction material tank, 13-4-top-contacting foaming material and 13-5-material conveying integration.
Detailed Description
An embodiment of the invention is further described below with reference to the accompanying drawings:
as shown in fig. 1, the front end of a working face 6 is an unexhausted coal body 1, the rear part of the working face is a goaf 2, a retained roadway 4 is arranged on the lower section coal body 10 side of the working face 6, and a retained roadway wall 3 is constructed in the retained roadway 4; the invention relates to a gob-side entry retaining wall construction system based on a concrete 3D printing technology, which comprises extrusion system slide rails 12-13 and a concrete 3D printing system 11, wherein the extrusion system slide rails 12-13 and the concrete 3D printing system 11 are arranged at a position where an entry retaining wall 3 needs to be constructed in a fully mechanized mining face, the concrete 3D printing system 11 comprises a material extrusion system 12 and a material preparation system 13, the material extrusion system 12 is arranged on the extrusion system slide rails 12-13 through driving wheels, the material preparation system 13 is arranged in an entry retaining section, the extrusion system slide rails 12-13 are connected with the rear end of a base of an end hydraulic support 15 arranged on the fully mechanized mining face, and the extrusion system slide rails 12-13 can move forwards along with the extrusion system slide rails in the forward moving process of the; the material preparation system 13 is connected with the material extrusion system 12 through an output pipeline; all output pipelines of the hard wall construction material tank 13-2, the soft wall construction material tank 13-3, the additive tank 13-4, the raw material tank 13-5 and the top-contacting foaming material tank 13-4 are bundled to form a material conveying integration 13-5 which is connected with the extrusion system base 12-12.
As shown in fig. 2, the material extrusion system 12 comprises an extrusion system base 12-12 arranged on an extrusion system sliding rail 12-13, the extrusion system base 12-12 is provided with an upper cross beam 12-1 transversely arranged by an upright column, the upright column comprises a lower main upright column 12-11 arranged above the extrusion system base 12-12, the lower main upright column 12-11 is provided with an upper auxiliary upright column 12-2 connected with the upper cross beam 12-1, the upper auxiliary upright column 12-2 is hydraulically coupled with the lower main upright column 12-11, the upper auxiliary upright column 12-2 can slide up and down, and a rotating mechanism is arranged between the upper auxiliary upright column 12-2 and the lower main upright column 12-11, so that the upper cross beam 12-1 can horizontally rotate by taking the upper auxiliary upright column 12-2 as an axis; a top connecting nozzle 12-14 is arranged at the end part of the upper beam 12-1, a near end nozzle 12-9 and a far end nozzle 12-10 are respectively arranged below the upper beam 12-1 through a near end nozzle connecting block 12-3 and a far end nozzle connecting block 12-4, a slide rail is arranged below the upper beam 12-1, and the near end nozzle connecting block 12-3 and the far end nozzle connecting block 12-4 are connected with the upper beam 12-1 in a sliding way through the slide rail; the lower part of the near-end nozzle connecting block 12-3 is connected with a near-end nozzle 12-9 through a near-end nozzle large-diameter adapter nozzle 12-5 and a near-end nozzle small-diameter adapter nozzle 12-7 which are used for controlling the material outflow speed in sequence; the lower part of the far-end nozzle connecting block 12-4 is connected with a far-end nozzle 12-10 through a far-end nozzle large-diameter adapter 12-6 and a far-end nozzle small-diameter adapter 12-8 which are used for controlling the material outflow speed in sequence;
as shown in FIG. 3, the material preparation system 13 comprises a main control system 13-1, a hard wall construction material tank 13-2, a soft wall construction material tank 13-3, an additive tank 13-4, a raw material tank 13-5 and a top-contacted foaming material tank 13-4; the main control system 13-1 is used for controlling the printing speed, the printing layer height and the nozzle extrusion speed of the material extrusion system 12 by inputting 3D printing model file parameters, the hard wall construction material tank 13-2, the soft wall construction material tank 13-3 and the top-connected foaming material tank 13-4 are connected with the material extrusion system 12 through output pipelines and supply materials, the hard wall construction material tank 13-2 is further connected with the near-end nozzle 12-9 through an output pipe and supply materials, the soft wall construction material tank 13-3 is further connected with the far-end nozzle 12-10 through an output pipe and supply materials, and the top-connected foaming material tank 13-4 is further connected with the top-connected nozzle 12-14 through an output pipe and supply materials.
A working method of a gob-side entry retaining wall construction system based on a concrete 3D printing technology comprises the following steps:
a, connecting extrusion system slide rails 12-13 behind an end hydraulic support 15 base close to the end of a working face, arranging the extrusion system 12 on the extrusion system slide rails 12-13, and arranging a material preparation system 13 at a roadway retaining section;
b, connecting a material extrusion system 12 with a material preparation system 13 through a material conveying integration 13-5, and checking the extrusion smoothness of a top nozzle 12-14, a near-end nozzle 12-9 and a far-end nozzle 12-10 of the material extrusion system 12;
c, filling the prepared hard wall construction material into a hard wall construction material tank 13-2, filling the soft wall construction material into a soft wall construction material tank 13-3, and then filling the top-contacting foaming material into a top-contacting foaming material tank 13-4 to ensure the uniformity of material mixing in each tank body;
d, establishing a retained roadway 3D printing construction model by using a computer, comprehensively considering the factors of working face propelling speed, geological structure and roof breakage pressure, decomposing the retained roadway wall 3 into a plurality of printing walls 14 with equal width, wherein the printing walls 14 are formed by combining a soft wall 3-2 and a hard wall 3-1, setting various 3D printing parameters including printing speed, printing layer height and nozzle extrusion speed, and then importing files recording corresponding data into a main control system 13-1; according to the imported document data, the main control system 13-1 builds a soft wall 3-2 at the side close to a goaf by a far-end nozzle 12-10 according to the preset requirements of the width and the height of a printing wall 14, the layer height is 5-10 cm, then starts a near-end nozzle 12-9 to build a hard wall 3-1 at the side close to a roadway, the layer height is equal to 5-10 cm, finally forms a printing wall 14 with the equivalent layer height, the printing wall 14 is suitable for the rotation of a top plate, avoids 'hard resistance', and has the effects of buffering and energy absorption;
the near-end nozzles 12-9 and the far-end nozzles 12-10 work circularly to finally construct and form the entry retaining wall 3, and when the constructed printing wall 14 is close to the top plate, the top-contacting nozzles 12-14 are started to spray foaming materials to enable the printing wall 14 to be in tight contact with the top plate;
and (3) checking the stability of the wall body at any time on the wall body section constructed behind the entry retaining 4, and performing remedial measures on the bad area in time. In the wall construction process, the upper beam 12-1 rotates to realize wall construction, the near-end nozzle 12-9 and the far-end nozzle 12-10 on the upper beam 12-1 also reciprocate along the slide rail of the upper beam 12-1, and meanwhile, the extrusion system base 12-12 also reciprocates on the extrusion system slide rail 12-13 to ensure the printing effect. And constructing a retained tunnel wall 3 at the rear of the retained tunnel 4, checking the stability of the retained tunnel wall 3 at any time, and performing remedial measures on the bad area in time.
Claims (8)
1. The utility model provides a gob entry wall body system of constructing based on concrete 3D printing technique which characterized in that: the device comprises extrusion system sliding rails (12-13) and a concrete 3D printing system (11), wherein the extrusion system sliding rails (12-13) and the concrete 3D printing system (11) are arranged at a position where a roadway retaining wall body (3) needs to be constructed in a fully mechanized mining face, the concrete 3D printing system (11) comprises a material extrusion system (12) and a material preparation system (13), the material extrusion system (12) is arranged on the extrusion system sliding rails (12-13) through driving wheels, the material preparation system (13) is arranged in a roadway retaining section, and the material preparation system (13) is connected with the material extrusion system (12) through an output pipeline;
the material extrusion system (12) comprises an extrusion system base (12-12) arranged on an extrusion system sliding rail (12-13), the extrusion system base (12-12) is provided with an upper cross beam (12-1) transversely arranged through a vertical column, the end part of the upper cross beam (12-1) is provided with a top connecting nozzle (12-14), a near-end nozzle (12-9) and a far-end nozzle (12-10) are respectively arranged below the upper cross beam (12-1) through a near-end nozzle connecting block (12-3) and a far-end nozzle connecting block (12-4), the sliding rail is arranged below the upper cross beam (12-1), and the near-end nozzle connecting block (12-3) and the far-end nozzle connecting block (12-4) are in sliding connection with the upper cross beam (12-1) through the sliding rail;
the material preparation system (13) comprises a master control system (13-1), a hard wall construction material tank (13-2), a soft wall construction material tank (13-3) and a top-connected foaming material tank (13-4); the main control system (13-1) is used for controlling the printing speed, the printing layer height and the nozzle extrusion speed of the material extrusion system (12) by inputting 3D printing model file parameters, the hard wall construction material tank (13-2), the soft wall construction material tank (13-3) and the top connection foaming material tank (13-4) are connected with the material extrusion system (12) through output pipelines and supply materials, the hard wall construction material tank (13-2) is further connected with the near-end nozzle (12-9) through an output pipe and supply materials, the soft wall construction material tank (13-3) is further connected with the far-end nozzle (12-10) through an output pipe and supply materials, and the top connection foaming material tank (13-4) is further connected with the top connection nozzle (12-14) through an output pipe and supply materials.
2. The gob-side entry retaining wall construction system based on concrete 3D printing technology of claim 1, wherein: all output pipelines of the hard wall construction material tank (13-2), the soft wall construction material tank (13-3) and the top-connected foaming material tank (13-4) are bundled to form a material conveying integration (13-5) which is connected with an extrusion system base (12-12).
3. The gob-side entry retaining wall construction system based on concrete 3D printing technology of claim 1, wherein: the lower part of the near-end nozzle connecting block (12-3) is connected with a near-end nozzle (12-9) through a near-end nozzle large-diameter adapter (12-5) and a near-end nozzle small-diameter adapter (12-7) which are used for controlling the material outflow speed in sequence; the lower part of the far-end nozzle connecting block (12-4) is connected with a far-end nozzle (12-10) through a far-end nozzle large-diameter adapter (12-6) and a far-end nozzle small-diameter adapter (12-8) which are used for controlling the material outflow speed in sequence.
4. The gob-side entry retaining wall construction system based on concrete 3D printing technology of claim 1, wherein: the upright column comprises a lower main upright column (12-11) arranged above an extrusion system base (12-12), an upper auxiliary upright column (12-2) connected with an upper cross beam (12-1) is arranged on the lower main upright column (12-11), the upper auxiliary upright column (12-2) is hydraulically coupled with the lower main upright column (12-11), the upper auxiliary upright column (12-2) can slide up and down, and a rotating mechanism is arranged between the upper auxiliary upright column (12-2) and the lower main upright column (12-11), so that the upper cross beam (12-1) can horizontally rotate by taking the upper auxiliary upright column (12-2) as an axis.
5. The gob-side entry retaining wall construction system based on concrete 3D printing technology of claim 1, wherein: the extrusion system sliding rails (12-13) are connected with the rear end of a base of an end hydraulic support (15) arranged on the fully mechanized face, and the extrusion system sliding rails (12-13) can move forwards along with the end hydraulic support (15) in the forward movement process.
6. A working method of the gob-side entry retaining wall construction system based on the concrete 3D printing technology according to any one of the preceding claims, characterized by the following steps:
a, connecting an extrusion system sliding rail (12-13) behind a base of an end hydraulic support (15) close to the end of a working face, arranging the extrusion system (12) on the extrusion system sliding rail (12-13), and arranging a material preparation system (13) at a roadway retaining section;
b, connecting a material extrusion system (12) with a material preparation system (13) through a material conveying integration (13-5), and checking the extrusion smoothness of a top nozzle (12-14), a near-end nozzle (12-9) and a far-end nozzle (12-10) of the material extrusion system (12);
c, filling the prepared hard wall construction material into a hard wall construction material tank (13-2), filling the soft wall construction material into a soft wall construction material tank (13-3), and then filling the top-contacting foaming material into a top-contacting foaming material tank (13-4) to ensure the uniformity of material mixing in each tank body;
d, establishing a retained roadway 3D printing construction model by using a computer, comprehensively considering the factors of working face propulsion speed, geological structure and roof breakage pressure, decomposing the retained roadway wall (3) into a plurality of printing walls (14) with equal width, wherein the printing walls (14) are formed by combining a soft wall (3-2) and a hard wall (3-1), setting various 3D printing parameters including printing speed, printing layer height and nozzle extrusion speed, and then importing files recording corresponding data into a main control system (13-1); according to the imported document data, a main control system (13-1) builds a soft wall (3-2) at the side close to a goaf by a far-end nozzle (12-10) according to the preset wall width and height requirements, the layer height is 5-10 cm, then starts a near-end nozzle (12-9) to build a hard wall (3-1) at the side close to a roadway, the layer height is equal to 5-10 cm, finally forms a printing wall (14) with the equivalent layer height, the wall (14) is suitable for the rotation of a top plate, avoids 'hard resistance', and has the buffering and energy absorption effects;
the near-end nozzles (12-9) and the far-end nozzles (12-10) work circularly, and finally a printing wall body (14) is constructed and formed; when the constructed printing wall (14) approaches the top plate, the abutting nozzles (12-14) are started to spray foaming materials, so that the whole printing wall (14) is in close contact with the top plate.
7. The method of operation of claim 6, wherein: in the wall construction process, the upper cross beam (12-1) rotates to realize wall construction, the near-end nozzles (12-9) and the far-end nozzles (12-10) on the upper cross beam (12-1) reciprocate along the slide rails of the upper cross beam (12-1), and meanwhile, the extrusion system base (12-12) also reciprocates on the extrusion system slide rails (12-13), so that the printing effect is guaranteed.
8. The method of operation of claim 6, wherein: the stability of the printed wall (14) is checked at any time on the wall section constructed behind the entry retaining (4), and remedial measures are taken in time on the bad area.
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| CN202110265904.7A CN112879048B (en) | 2021-03-11 | 2021-03-11 | Gob-side entry retaining wall construction system and method based on concrete 3D printing technology |
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| CN112879048B CN112879048B (en) | 2022-03-04 |
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| CN207808002U (en) * | 2018-01-26 | 2018-09-04 | 北京崇建工程有限公司 | A kind of multi-nozzle 3D printer for building and load wagon |
| CN108397213A (en) * | 2018-02-11 | 2018-08-14 | 中煤能源研究院有限责任公司 | Gob side entry retaining 3D printing Xiang Pang walls robot and construction method |
| CN208996459U (en) * | 2018-09-06 | 2019-06-18 | 深圳市新国俊建筑装饰设计工程有限公司 | A kind of special-shaped wall frame equipment of 3D printing building |
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| CN112879048B (en) | 2022-03-04 |
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