NL2034720B1

NL2034720B1 - Top muck discharge system and method of shaft full-face boring machine

Info

Publication number: NL2034720B1
Application number: NL2034720A
Authority: NL
Inventors: Zhang Yong; Ni Youli; Zhang Peng; Ding Bo; Xu Bin; Man Donghui; Lv Lin; Cao Chuangguo; Liu Yingcan; Shi Changsheng; Zhou Guozheng; Bao Tingting; Li Zheng; Xu Huidong; Ye Jinghui
Original assignee: China Coal No 71 Engineering Company Ltd; Hefei Design & Res Institute Of Coal Industry Co Ltd
Priority date: 2022-08-25
Filing date: 2023-04-28
Publication date: 2023-12-18
Also published as: CN115324582A; NL2034720A

Abstract

The present invention discloses a top muck discharge system of a shaft full-face boring machine, including a f1rst-level muck discharge unit, a second-level muck discharge unit and a control system. A muck pump of the f1rst-level muck discharge unit is disposed in a boring machine cutterhead, and multi-scale muck and water are upwardly discharged to the 10 second-level muck discharge unit by a f1rst-level muck discharge pipeline; an inlet of a water-muck separation device of the second-level muck discharge unit communicates with the f1rst-level muck discharge pipeline, a muck outlet communicates with a crushing device, and a water outlet communicates with a slurry bin, an inlet of a grinding device communicates with the muck outlet of the water-muck separation device, and an outlet of the grinding device 15 communicates with the slurry bin, and slurry in the slurry bin is pumped, by a second-level muck pump, to the ground. The present invention solves the problem that it is difﬁcult to arrange relay stations in a shaft, and after the large-scale muck is removed, the problem of pipe blockage is effectively solved, a slurry cycle becomes a water cycle, and thus energy consumption is greatly reduced, and the muck discharge system can operate efﬁciently and 20 continuously, which lays a solid foundation for intelligent and efficient shaft construction.

Description

TOP MUCK DISCHARGE SYSTEM AND METHOD OF SHAFT FULL-FACE

BORING MACHINE

FIELD OF TECHNOLOGY

The present invention relates to a top muck discharge system and method of a shaft full-face boring machine, and belongs to the technical field of underground engineering construction.

BACKGROUND

Efficient and continuous top muck discharge during full-face boring machine construction in a shaft, particularly in a deep shaft has become a current key shaft technical problem at home and abroad, resulting in low deep shaft construction efficiency.

A first traditional muck discharge mode adopts a cyclic slurry discharge mode. A certain proportion of slurry is adopted therein to wrap muck to be elevated and transported by a slurry pump, and then the slurry returns to a working face to be cyclically used. The slurry in a shallow shaft (100 m) can be directly transported to the ground; and a plurality of sets of relay stations are required to be disposed in a medium shaft and the deep shaft to transport the slurry to the ground through relay. The first traditional muck discharge mode has the defects that slurry cycle efficiency is low, and energy consumption is high; large-scale muck is likely to block pipes, causing a high fault rate; due to a limited shaft space, it is difficult to arrange the relay stations, and reliability is poor; and a plurality of chemical agents are added in the slurry, which hardly satisfies environment protection requirements.

A second traditional muck discharge mode is a mode combining a first-level muck pump and a second-level lifting bucket. A water-muck separation apparatus is required to be disposed on a hoist, the muck pump conveys water and the muck into the water-muck separation apparatus on the hoist in a short distance, and a winch drives the bucket to transport the muck obtained after separation to the ground. The second traditional muck discharge mode has the defects that process automation is hard to implement in bucket transportation; and there are generally many links, complex procedures, and many devices which are not continuous; muck discharge efficiency is low; and energy consumption is high.

SUMMARY

In order to overcome the defects in the prior art, an objective of the present invention is to provide a top muck discharge system and method of a shaft full-face boring machine, thereby effectively solving the existing problems.

The present invention adopts the following technical scheme for solving the technical problems:

A top muck discharge system of a shaft full-face boring machine includes: a first-level muck discharge unit, a second-level muck discharge unit and a control system; the first-level muck discharge unit includes a first-level muck pump and a first-level muck discharge pipeline, the first-level muck pump is disposed in a boring machine cutterhead, and multi-scale muck and water are upwardly discharged to the second-level muck discharge unit through the first-level muck discharge pipeline; the second-level muck discharge unit includes a water-muck separation device, a crushing device, a grinding device, a slurry bin and a second-level muck pump which are disposed from top to bottom; an inlet of the water-muck separation device communicates with the first-level muck discharge pipeline, a muck outlet communicates with the crushing device, and a water outlet communicates with the slurry bin; an inlet of the grinding device communicates with the muck outlet of the water-muck separation device, and an outlet of the grinding device communicates with the slurry bin; and slurry in the slurry bin is pumped, by the second-level muck pump, to the ground.

Preferably, further, a settling pond is disposed on the ground and communicates with a second-level muck discharge pipeline of the second-level muck pump, a partition is disposed in the settling pond, and clear water passing through the partition returns, by a water return pipeline, to a driving face to be cyclically utilized.

Preferably, further, the slurry bin further communicates with a water supply pipe, a stirring apparatus, a high-liquid-level sensor, a low-liquid-level sensor and a slurry concentration sensor are further disposed in the slurry bin, and the sensors and an electromagnetic valve controlling opening and closing of the water supply pipe are all electrically connected to the control system.

Preferably, further, muck having a granularity less than or equal to 0.4 mm and water in the water-muck separation device directly enter the slurry bin through a pipeline.

Preferably, further, muck having a muck granularity less than 8 mm after being crushed in the crushing device enters the grinding device.

Preferably, further, muck having a muck granularity less than 0.4 mm after being ground in the grinding device enters the slurry bin to be stirred into slurry to be pumped, by the second-level muck pump, to the settling pond.

A method for adopting the above top muck discharge system to perform shaft top muck discharge includes following steps:

S1: arranging the first-level muck pump in an inner cavity of the boring cutterhead of a boring machine, and connecting the first-level muck discharge pipeline to the water-muck separation device;

S2: suspending the multi-layer hoist for construction in the boring shaft, arranging the second-level muck pump, the slurry bin, the grinding device, the crushing device and the water-muck separation device on different layers of the hoist, and arranging the water supply pipe for the slurry bin;

S3: making the second-level muck discharge pipeline of the second-level muck pump communicate with the settling pond, and returning, by the water return pipeline, the clear water of the settling pond to the driving face;

S4: making muck generated in the boring process of the boring machine fall into the inner cavity of the boring cutterhead to be mixed with the water returned from the settling pond to form multi-scale slurry, and pumping, by the first-level muck pump, the slurry into the water-muck separation device when the slurry reaches a set depth;

SS: making muck having a granularity less than or equal to 0.4 mm and water in the water-muck separation device directly enter the slurry bin, making large-scale muck enter the crushing device, making muck having a muck granularity less than 8 mm after being crushed enter the grinding device, making muck having a muck granularity less than 0.4 mm after being ground enter the slurry bin to be stirred, by the stirring apparatus, into slurry in the slurry bin together with water supplied by the water supply pipe, and controlling opening and closing of a valve in the water supply pipe according to signals fed back by the slurry concentration sensor in the slurry bin, thereby controlling the slurry to be constantly kept in a set concentration range;

S6: controlling opening and closing of an outlet valve of the slurry bin by signals fed back by the high-liquid-level sensor and the low-liquid-level sensor in the slurry bin, such that slurry with proper concentration flows to the second-level muck pump from a slurry bin outlet and is pumped to the settling pond via the second-level muck discharge pipeline ; and

S7: making the deposited muck truck-loaded and transported to a utilization place, and returning the clear water obtained after sedimentation to the driving face through the water return pipeline (32), and repeating the process.

Compared with the prior art, the present invention has the following beneficial effects:

After the present invention adopts the first-level muck pump to vertically elevate the multi-scale muck to the second-level muck discharge unit on the hoist in a short distance according to the characteristics of the high proportion of small-scale muck and the low proportion of the large-scale muck during full-face boring machine construction, the large-scale muck is crushed and ground into the small-scale muck through classified crushing to be directly conveyed together with previous separated small-scale muck to the ground through the high-lift muck pump. The present invention solves the problem that it is difficult to arrange relay stations in a shaft and the problem about system reliability; after the large-scale muck is removed, the problem of pipe blockage is effectively solved; a slurry cycle becomes a water cycle, and thus energy consumption is greatly reduced; and the muck discharge system can operate efficiently and continuously, which lays a solid foundation for intelligent and efficient shaft construction.

BRIEF DESCRIPTION OF THE DRAWINGS

FIG. 1 is an overall structural schematic diagram of the present invention; and due to a limited space of A4, to facilitate showing the structure of the present invention, FIG. 1 is divided into three parts, and FIGS. 2 to 4 are partial diagrams of a part A, a part B and a part

C in FIG. 1 respectively.

Reference numerals: 11-first-level muck pump; 12-first-level muck discharge pipeline; 2 1-water-muck separation device; 22-crushing device, 23-grinding device; 24-slurry bin; 25-second-level muck pump; 26-second-level muck discharge pipeline; 241-water supply pipe; 242-stirring apparatus; 243-high-liquid-level sensor; 244-low-liquid-level sensor; 245-slurry concentration sensor; 3-settling pond, 31-partition; 32-water return pipeline; 4-boring machine cutterhead; and 5-hoist.

The present invention is further described in detail in combination with drawings and specific embodiments as below.

DESCRIPTION OF THE EMBODIMENTS

To make purposes, technical schemes and advantages of embodiments of the present invention more clear, the technical schemes in the embodiments of the present invention are clearly and integrally described in combination with the embodiments of the present invention as below, and it is apparent that the described embodiments are only a part rather all of embodiments of the present invention. Based on the embodiments of the present invention, all 5 other embodiments obtained by those of ordinary skill in the art without contributing creative labor shall fall within the scope of protection of the present invention.

Embodiment: refer to the drawings, a top muck discharge system in the present invention is applicable to a full-face boring machine vertical shaft, including: a first-level muck discharge unit, a second-level muck discharge unit and a control system, where the first-level muck discharge unit includes a first-level muck pump 11 and a first-level muck discharge pipeline 12, the first-level muck pump 11 is disposed in a boring machine cutterhead 4, and multi-scale muck and water are upwardly discharged to the second-level muck discharge unit through the first-level muck discharge pipeline 12; and the second-level muck discharge unit includes a water-muck separation device 21, a crushing device 22, a grinding device 23, a slurry bin 24 and a second-level muck pump 25, which are disposed from top to bottom and all can be disposed on a multi-layer hoist in the shaft.

An inlet of the water-muck separation device 21 communicates with the first-level muck discharge pipeline 12, a muck outlet communicates with the crushing device, and a water outlet (a fine crushed slag outlet) communicates with the slurry bin 24; an inlet of the grinding device 23 communicates with the muck outlet of the water-muck separation device, and an outlet of the grinding device 23 communicates with the slurry bin 24; and slurry in the slurry bin 24 is pumped by the second-level muck pump 25 to the ground.

During specific application, a settling pond 3 is disposed on the ground and communicates with a second-level muck discharge pipeline 26 of the second-level muck pump 25, a partition 31 is disposed in the settling pond 3, and clear water passing through the partition returns, by a water return pipeline 32, to a driving face to be cyclically utilized.

In order to make the slurry in the slurry bin be at a proper concentration all the time, the slurry bin 24 further communicates with a water supply pipe 241, a stirring apparatus 242, a high-liquid-level sensor 243, a low-liquid-level sensor 244 and a slurry concentration sensor 245 are further disposed in the slurry bin 24, and the sensors and an electromagnetic valve controlling opening and closing of the water supply pipe 241 are all electrically connected to the control system.

A working process and a working method of the present invention generally include following steps in which some conventional construction steps are omitted and are unnecessary to repeat.

S1: The first-level muck pump 11 is disposed in an inner cavity of the boring cutterhead of the boring machine, and the first-level muck discharge pipeline 12 is connected to the water-muck separation device 21.

S2: The multi-layer hoist 5 for construction is suspended in the boring shaft, the second-level muck pump 25, the slurry bin 24, the grinding device 23, the crushing device 22 and the water-muck separation device 21 are sequentially disposed on different layers of the hoist from bottom to top, the water supply pipe 241 for the slurry bin 24 and other devices are disposed, corresponding pipelines are connected, matched valves are installed, and inlet and outlet connection between the devices and other preparation work are performed.

S3: The second-level muck discharge pipeline 26 of the second-level muck pump 25 communicates with the settling pond 3, and clear water of the settling pond 3 returns, by the water return pipeline 32, to the driving face.

S4: Muck generated in the boring process of the boring machine falls into the inner cavity of the boring cutterhead to be mixed with the water returned from the settling pond to form multi-scale slurry, and when the slurry reaches a set depth, the first-level muck pump 11 pumps the slurry into the water-muck separation device 21.

SS: Muck having a granularity less than or equal to 0.4 mm and water in the water-muck separation device 21 directly enter the slurry bin 24 through a pipeline, large-scale muck enters the crushing device 22, muck having a muck granularity less than 8 mm after being crushed enters the grinding device 23, muck having a muck granularity less than 0.4 mm after being ground enters the slurry bin 24 to be stirred, by the stirring apparatus 242, into slurry in the slurry bin together with water supplied by the water supply pipe 241, and opening and closing of a valve in the water supply pipe 241 are controlled according to signals fed back by the slurry concentration sensor 245 in the slurry bin, thereby controlling the slurry to be

- constantly kept in a set concentration range.

S6: Open and close of an outlet valve of the slurry bin 24 are controlled by signals fed back by the high-liquid-level sensor 243 and the low-liquid-level sensor 244 in the slurry bin 24, such that slurry with proper concentration flows to the second-level muck pump 25 from a slurry bin outlet and is pumped to the settling pond 3 via the second-level muck discharge pipeline 26.

S7: The deposited muck is truck-loaded and transported to a utilization place, and clear water obtained after sedimentation returns to the driving face through the water return pipeline 32, and the process is cyclic.

A centralized control center is disposed on the ground, and the control system inside is connected to the devices, pumps, valves, sensors, etc. through cable connection control, and controls the muck discharge system to realize full-automatic continuous operation and unattended operation.

It is to be explained that parts not elaborated in the present invention belong to the prior art in the field or can be directly acquired by purchase from the market, which can be obtained by those skilled in the art without creative labor, and a specific connection mode has extremely wide application in the field or daily life, which 1s not described in detail herein.

In addition, those skilled in the art can combine different embodiments or examples described in the specification and features of different embodiments or examples under the situation that mutual contradiction does not exist. Although the embodiments of the present invention have been shown and described above, it is to be understood that the above embodiments are exemplary and are not to be construed as limiting the present invention.

Changes, modifications, alterations and variations of the above embodiments may be made by those of ordinary skill in the art within the scope of the present invention.

Claims

CONCLUSIESCONCLUSIONS

1. Slakafvoersysteem van een verticale schachtboormachine, daardoor gekenmerkt dat zij bevat: een eerste niveau slakafvoereenheid, een tweede niveau slakafvoereenheid en een besturingssysteem; waarbij de eerste niveau slakafvoeringingseenheid een eerste niveau slakafvoeringingspomp (11) en een eerste niveau slakafvoeringingsleiding (12) bevat, de eerste niveau slakafvoeringingspomp (11) aangebracht is in de snijkop van de wegfrees en voorzien is om meervoudige slak en water omhoog naar de tweede niveau slakafvoeringingseenheid via de eerste niveau slakafvoeringingsleiding (12) te pompen; de tweede niveau slakafvoeringingseenheid een water-slakkenscheidingsinstallatie (21), een verbrijzelingsinstallatie (22), een maalinstallatie (23), een slakkenpaddlebak (24) en een tweede niveau slakkenpomp (25) die van de bovenkant naar de onderkant zijn aangebracht; een inlaat van de water-slakkenscheidingsinstallatie (21) is verbonden met de eerste niveau slakafvoeringingsleiding (12), een slakuitlaat is verbonden met de verbrijzelingsinstallatie en een wateruitlaat is verbonden met de slakkenpaddbak (24); een inlaat van de maalinstallatie (23) is verbonden met de slakuitlaat van de water-slakkenscheidingsinstallatie en een uitlaat van de maalinstallatie (23) 1s verbonden met de slakkenpadbak (24); waarbij het systeem voorzien is om slib in de slakkenpadbak (24) naar de grond te pompen door middel van de tweede niveau slakkenpomp (25).CLAIMS 1. Slag discharge system of a vertical shaft drilling machine, characterized in that it includes: a first level slag discharge unit, a second level slag discharge unit and a control system; wherein the first level slag discharge unit includes a first level slag discharge pump (11) and a first level slag discharge line (12), the first level slag discharge pump (11) is mounted in the cutter head of the road mill and is provided to convey multiple slag and water up to the second level pumping the slag discharge unit via the first level slag discharge line (12); the second level slag discharge unit a water-slag separation plant (21), a crushing plant (22), a grinding plant (23), a slag paddle box (24) and a second level slag pump (25) arranged from the top to the bottom; an inlet of the water-slag separation plant (21) is connected to the first level slag discharge pipe (12), a slag outlet is connected to the crushing plant and a water outlet is connected to the slag padding tank (24); an inlet of the grinding plant (23) is connected to the slag outlet of the water-slag separation plant and an outlet of the grinding plant (23) is connected to the slag pad tank (24); wherein the system is provided to pump sludge in the slag pad container (24) to the ground by means of the second level slag pump (25).

2. Slakafvoersysteem van een verticale schachtboormachine volgens conclusie 1, daardoor gekenmerkt dat een bezinkingstank (3) is voorzien op grondniveau welke met de tweede niveau slakafvoerleiding (26) van de tweede niveau slakkenpomp (25) is verbonden, een tussenschot (31) is voorzien in de bezinkingstank (3) om helder water dat het tussenschot heeft doorkruist terug te voeren naar een boorfront via een waterretourleiding (32) voor cyclisch hergebruik.Slag discharge system of a vertical shaft drilling machine according to claim 1, characterized in that a settling tank (3) is provided at ground level which is connected to the second level slag discharge pipe (26) of the second level slag pump (25), a partition (31) is provided in the settling tank (3) to return clear water that has crossed the septum to a drill face via a water return line (32) for cyclical reuse.

3. Slakafvoersysteem van een verticale schachtboormachine volgens conclusie 1, daardoor gekenmerkt dat de slakkenpadbak (24) verder is verbonden met een watertoevoerleiding (241), en de slakkenpadbak (24) is uitgerust met een roerinrichting (242), een hoog niveau sensor (243), een laag niveau sensor (244) en een slakkenconcentratiesensorSlag discharge system of a vertical shaft drilling machine according to claim 1, characterized in that the slag pad trough (24) is further connected to a water supply line (241), and the slug pad trough (24) is equipped with a stirring device (242), a high level sensor (243). ), a low level sensor (244) and a slag concentration sensor

(245), die elk elektrisch verbonden zijn met het besturingssysteem, evenals een magneetklep die de openen en sluiten van de watertoevoerleiding (241) regelt.(245), each of which is electrically connected to the control system, as well as a solenoid valve that controls the opening and closing of the water supply line (241).

4. Slakafvoersysteem van een verticale schachtboormachine volgens conclusie 1, daardoor gekenmerkt dat in de water-slakkenscheidingsinstallatie (21) de slakken met een deeltjesgrootte van < 0,4 mm samen met het water via een pijpleiding rechtstreeks in de slakkenpadbak (24) in te brengen zijn.Slag discharge system of a vertical shaft drilling machine according to claim 1, characterized in that in the water-slag separation plant (21) the slag with a particle size of < 0.4 mm can be introduced together with the water via a pipeline directly into the slag pad trough (24). are.

5. Slakafvoersysteem van een verticale schachtboormachine volgens conclusie 1, daardoor gekenmerkt dat slak met een deeltjesgrootte <8 mm na te zijn verbrijzeld in de verbrijzelingsinstallatie (22) rechtstreeks in de maalinstallatie (23) inbrengbaar is.Slag discharge system of a vertical shaft drilling machine according to claim 1, characterized in that slag with a particle size <8 mm can be introduced directly into the grinding installation (23) after being crushed in the crushing installation (22).

6. Slakafvoersysteem van een verticale schachtboormachine volgens conclusie 5, daardoor gekenmerkt dat slak met een deeltjesgrootte van <0,4 mm na het malen in de maalinstallatie (23) in de slakkenpaddleerbak inbrenbaar is (24) om aldaar te worden geroerd tot een slak die door de tweede niveau slakkenpomp (25) naar de bezinkbak (3) te pompen is.Slag discharge system of a vertical shaft drilling machine according to claim 5, characterized in that slag with a particle size of <0.4 mm can be introduced into the slag paddle hopper (24) after grinding in the grinding installation (23) to be stirred there into a slag that can be pumped to the settling tank (3) by the second level slag pump (25).

7. Methode voor het opwaartse slakken uit een schacht met behulp van het slakkenafvoersysteem volgens één van de conclusies 1-6, daardoor gekenmerkt dat zij de volgende stappen omvat:Method for removing slag upwards from a shaft using the slag discharge system according to any one of claims 1 to 6, characterized in that it comprises the following steps:

S1. Het opstellen van een eerste niveau slakafvoerpomp (11) in een binnenholte van de snijkop van de wegfrees en het aansluiten van een eerste niveau slakafvoerleiding (12) met de waterslakkenscheidingsinstallatie (21);S1. Arranging a first level slag discharge pump (11) in an inner cavity of the cutting head of the road mill and connecting a first level slag discharge pipe (12) with the water slag separation plant (21);

S2. ophanging van de meerlaagse bouwkraan in de schacht, opstellen van de tweede niveau slakkenpomp (25), slakkenschoepenbak (24), maalinstallatie (23), verbrijzelingsinstallatie (22), water-slakkenscheidingsinstallatie (21) op verschillende niveaus van de kraan en aanbrengen van de watertoevoerleiding (241) voor de slakkenpaddleerbak (24);S2. suspension of the multi-level construction crane in the shaft, installation of the second level slag pump (25), slag bucket (24), grinding plant (23), crushing plant (22), water-slag separation plant (21) at different levels of the crane and installing the water supply line (241) for the snail paddle hopper (24);

S3. verbinden van de tweede niveau slakatvoerleiding (26) van de tweede niveau slakkenpomp (25) met de de bezinkingstank (3) en het heldere water uit de bezinkingstank (3) terugvoeren via de waterretourleiding (32) naar het graafvlak voor cyclish hergebruik;S3. connecting the second level slag feed line (26) of the second level slag pump (25) to the settling tank (3) and returning the clear water from the settling tank (3) via the water return line (32) to the excavation surface for cyclical reuse;

S4. de tijdens het boorproces door de wegfrees geproduceerde slak in de binnenste holte van de snijkop laten vallen om het te mengent met het uit de bezinktank teruggevoerde water tot een meervoudige slakkenslak, door de eerste niveau slakafvoerpomp (11) pompen van de slak naar de water-slakkenscheidingsinstallatie (21) wanneer de slak een bepaalde diepte bereikt heeft;S4. dropping the slag produced by the road mill during the drilling process into the inner cavity of the cutting head to mix it with the water returned from the settling tank into a multiple slag slag, through the first level slag discharge pump (11) pumping the slag to the water slag separation installation (21) when the slag has reached a certain depth;

S5. de slak met deeltjesgrootte < 04mm samen met water in de water-slakkenscheidingsinstallatie (21) direct in de slakkenpadbak (24) brengen, de grootschalige slak gaat in de verbrijzelingsinstallatie (22) brengen, de slak met deeltjesgrootte <8mm na het verbrijzelen in de maalinstallatie (23) brengen, de slak met deeltjesgrootte <0,4mm na het malen in de slakkenpadbak (24) brengen om het door de roerinrichting (242) geroerd te worden zodat slak in de slakkenpadbak (24) gevormd wordt tesamen met water dat door de watertoevoerleiding (241) toegevoerd wordt en het openen en sluiten van de klep in de watertoevoerleiding (241) besturen volgens signalen van de slakconcentratiesensor (245) in de slakkenpadbak t zodat de slak constant binnen het ingestelde concentratiebereik blijft;S5. the slag with particle size < 04mm together with water into the water-slag separation installation (21), directly into the slag pad container (24), the large-scale slag is placed in the crushing installation (22), the slag with particle size <8mm after crushing into the grinding installation (23), after grinding, place the slag with particle size <0.4 mm into the slag pad container (24) to be stirred by the stirring device (242) so that slag is formed in the slag pad container (24) together with water that is passed through the water supply line (241) is supplied and controls the opening and closing of the valve in the water supply line (241) according to signals from the slag concentration sensor (245) in the slag pad tank t so that the slag constantly remains within the set concentration range;

S6. het openen en sluiten van de klep aan de uitgang van de slakkenpadbak (24) sturen door de signalen van de hoog niveau sensor (243) en laag niveau sensor (244) in de slakkenpadbak (24) zodat de slak met de juiste concentratiestroom naar de tweede niveau slakkenpomp (25) stroomt wordt vanuit de uitgang van de slakkenpadbak en via de tweede niveau slakafvoerleiding (26) naar de bezinkingstank (3) wordt gepompt;S6. the opening and closing of the valve at the output of the snail pad container (24) is controlled by the signals from the high level sensor (243) and low level sensor (244) in the snail pad container (24) so that the snail with the correct concentration flow to the second level slag pump (25) flows from the outlet of the slag pad tank and is pumped via the second level slag discharge line (26) to the settling tank (3);

S7. de neergeslagen slak opladen en vervoeren naar de plaats van gebruik, terwijl het water verkregen na sedimentatie via de water retourleiding (32) wordt teruggevoerd naar het ontgravingsfront, en de methode herhalen.S7. charge the deposited slag and transport it to the place of use, while the water obtained after sedimentation is returned to the excavation face via the water return pipe (32), and repeat the method.