EP0438683B1 - Verfahren und Vorrichtung zum Aufbringen von Feinstmaterial auf den Grund und die Böschungen des Nasstagebaus - Google Patents

Verfahren und Vorrichtung zum Aufbringen von Feinstmaterial auf den Grund und die Böschungen des Nasstagebaus Download PDF

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Publication number
EP0438683B1
EP0438683B1 EP90123525A EP90123525A EP0438683B1 EP 0438683 B1 EP0438683 B1 EP 0438683B1 EP 90123525 A EP90123525 A EP 90123525A EP 90123525 A EP90123525 A EP 90123525A EP 0438683 B1 EP0438683 B1 EP 0438683B1
Authority
EP
European Patent Office
Prior art keywords
fine material
diffuser
extremely fine
lake
bank
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.)
Expired - Lifetime
Application number
EP90123525A
Other languages
German (de)
English (en)
French (fr)
Other versions
EP0438683A1 (de
Inventor
Wolfgang Rohr
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Rohr GmbH
Original Assignee
Rohr GmbH
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Filing date
Publication date
Application filed by Rohr GmbH filed Critical Rohr GmbH
Publication of EP0438683A1 publication Critical patent/EP0438683A1/de
Application granted granted Critical
Publication of EP0438683B1 publication Critical patent/EP0438683B1/de
Anticipated expiration legal-status Critical
Expired - Lifetime legal-status Critical Current

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Classifications

    • E—FIXED CONSTRUCTIONS
    • E02—HYDRAULIC ENGINEERING; FOUNDATIONS; SOIL SHIFTING
    • E02F—DREDGING; SOIL-SHIFTING
    • E02F3/00—Dredgers; Soil-shifting machines
    • E02F3/04—Dredgers; Soil-shifting machines mechanically-driven
    • E02F3/88—Dredgers; Soil-shifting machines mechanically-driven with arrangements acting by a sucking or forcing effect, e.g. suction dredgers
    • E02F3/8833—Floating installations
    • E—FIXED CONSTRUCTIONS
    • E02—HYDRAULIC ENGINEERING; FOUNDATIONS; SOIL SHIFTING
    • E02B—HYDRAULIC ENGINEERING
    • E02B3/00—Engineering works in connection with control or use of streams, rivers, coasts, or other marine sites; Sealings or joints for engineering works in general
    • E02B3/04—Structures or apparatus for, or methods of, protecting banks, coasts, or harbours
    • E02B3/12—Revetment of banks, dams, watercourses, or the like, e.g. the sea-floor
    • E—FIXED CONSTRUCTIONS
    • E02—HYDRAULIC ENGINEERING; FOUNDATIONS; SOIL SHIFTING
    • E02B—HYDRAULIC ENGINEERING
    • E02B3/00—Engineering works in connection with control or use of streams, rivers, coasts, or other marine sites; Sealings or joints for engineering works in general
    • E02B3/04—Structures or apparatus for, or methods of, protecting banks, coasts, or harbours
    • E02B3/12—Revetment of banks, dams, watercourses, or the like, e.g. the sea-floor
    • E02B3/121—Devices for applying linings on banks or the water bottom
    • E—FIXED CONSTRUCTIONS
    • E02—HYDRAULIC ENGINEERING; FOUNDATIONS; SOIL SHIFTING
    • E02F—DREDGING; SOIL-SHIFTING
    • E02F3/00—Dredgers; Soil-shifting machines
    • E02F3/04—Dredgers; Soil-shifting machines mechanically-driven
    • E02F3/88—Dredgers; Soil-shifting machines mechanically-driven with arrangements acting by a sucking or forcing effect, e.g. suction dredgers
    • E—FIXED CONSTRUCTIONS
    • E02—HYDRAULIC ENGINEERING; FOUNDATIONS; SOIL SHIFTING
    • E02F—DREDGING; SOIL-SHIFTING
    • E02F3/00—Dredgers; Soil-shifting machines
    • E02F3/04—Dredgers; Soil-shifting machines mechanically-driven
    • E02F3/88—Dredgers; Soil-shifting machines mechanically-driven with arrangements acting by a sucking or forcing effect, e.g. suction dredgers
    • E02F3/90—Component parts, e.g. arrangement or adaptation of pumps
    • E—FIXED CONSTRUCTIONS
    • E02—HYDRAULIC ENGINEERING; FOUNDATIONS; SOIL SHIFTING
    • E02F—DREDGING; SOIL-SHIFTING
    • E02F5/00—Dredgers or soil-shifting machines for special purposes
    • E—FIXED CONSTRUCTIONS
    • E02—HYDRAULIC ENGINEERING; FOUNDATIONS; SOIL SHIFTING
    • E02F—DREDGING; SOIL-SHIFTING
    • E02F7/00—Equipment for conveying or separating excavated material
    • E02F7/02—Conveying equipment mounted on a dredger
    • E—FIXED CONSTRUCTIONS
    • E02—HYDRAULIC ENGINEERING; FOUNDATIONS; SOIL SHIFTING
    • E02F—DREDGING; SOIL-SHIFTING
    • E02F7/00—Equipment for conveying or separating excavated material
    • E02F7/10—Pipelines for conveying excavated materials

Definitions

  • the invention relates to a method for sealing the bottom and the embankment of an excavated lake created during wet mining by applying fine material to the bottom and the embankment of the excavated lake, in which the dredged material is brought to a processing plant and there the usable sand and gravel material is separated from the fine material the fine material is then returned to the quarry lake.
  • Sand and gravel mining under water is carried out as follows.
  • the top layers in the topsoil and the clearing material are removed and reused according to the plan approval procedure.
  • Floating grapples and pneumatic excavators are used for great depths and bucket chain excavators, suction excavators and scrapers for shallower depths.
  • the suction dredger used here conveys 80% water and 20% gravel due to its function, the water components together with the fine material being pumped as far away as possible via a pipe so that the pumping of the usable material to a ship is not disrupted.
  • the fine material is deposited somewhere in an uncontrolled manner, without it having to perform any function.
  • only a part of the very fine material is detected in this known method or known device.
  • the invention is based on the object of proposing a method and a device with or with which the resulting fine material is used to seal the bottom and the embankment of an excavated lake formed during wet surface mining, so that the groundwater system is separated from the water of the surrounding aquifer.
  • An advantageous method step provides that the very fine material is pumped to and applied by an underwater diffuser.
  • a further process step provides that the fine material is temporarily stored on land before being applied to the ground and / or embankment and is pumped to the diffuser system with the addition of water.
  • An advantageous device for sealing the bottom and the embankment of an excavated lake created during wet open-cast mining by applying fine material to the bottom and / or the embankment of the quarry lake according to the process consisting of a mining device, a processing plant for the sand and gravel material with a device for separating the fine material, consists in that the device for separating the fine material is connected to at least one underwater diffuser via a pump and a pipe, which is attached to a swimming station and, in order to discharge the very fine material directly at the bottom and / or embankment of the quarry lake, is arranged with its opening directed towards the bottom or the embankment at the bottom or the embankment.
  • a further advantageous embodiment provides that the floating pipeline and the diffuser are anchored to the floating body of the floating station, the Pipeline is arranged on a swiveling boom system with a hoist.
  • the diffuser is flanged to a pivotable tube of the boom system.
  • the very fine material can be collected in a basin, which is connected to the diffuser by means of a pipe which is partly laid on land and partly floating.
  • the diffuser is connected via the pipelines to the basin and a floating treatment plant at the same time.
  • a second diffuser is connected to the floating treatment plant.
  • the diffuser is subsequently plate-shaped on its conical part, air inlet and air outlet guides being provided laterally above an abrasion plate.
  • the invention has the essential advantage that new raw material reserves can be tapped via a controlled seal without endangering the protection of the groundwater. On the contrary, the protection of the groundwater is significantly increased compared to conventional mining methods and the consumption of dredging area is minimized. With smaller and deeper water areas, the often mentioned problem of water evaporation is also kept to a minimum.
  • groundwater horizons withheld from drinking water production can be protected from contamination by sealing the sand and gravel extraction points.
  • FIG. 1 shows the top view of an excavator lake 24 in accordance with a mining plan, the excavator lake being divided into five mining sections I to V. After excavation section I is dredged, it is sealed using the method according to the invention.
  • the dredger 1 is shown with processing system 3, which is connected to the land via conveyor belts 27.
  • a treatment plant 3 ' is also provided on land, to which a landfill 31 is assigned, where the very fine material is collected.
  • a collecting container or basin 14 is provided, to which a floating pipeline 4 to a diffuser 16 is connected. The fine material is pumped to the diffuser 16 via this basin 14 with pump 32.
  • FIG. 2 shows the hydrogeological section of such a gravel mining site and the quarry lake 24 formed there.
  • the lake floor 12 or the embankments 13 are provided with a layer 19 of fine material as a sealing application.
  • the individual clay layers are clearly visible and hatched, with individual clay lenses 26 remaining due to the dredging.
  • sand and gravel material is conveyed by means of a dredger 1 with a gripper 2 lowered to the ground.
  • This material is processed in a processing plant 3 arranged on the excavator 1 in accordance with the DIN regulations.
  • the resulting fine material is pumped via a further floating pipeline 4 to a further underwater diffuser 5, which is arranged on a swimming station 6.
  • the swimming station 6 has a floating body 7 on which a pivotable boom system 8, 9 is arranged.
  • the boom system 8, 9 is provided with a hoist 10.
  • the floating pipeline 4 is anchored on the float 7, with a pivotable pipe 11 connecting which is connected to the underwater diffuser 5.
  • the underwater diffuser 5 has the task of removing the fine material coming from the pumps on the lake floor 12, without causing any significant clouding of the water, by reducing the flow rate and thickening the material. Furthermore, the design of the underwater diffuser 5 should be chosen so that the fine material concentrates and relaxes on the lake floor 12 and the embankment 13. The application of the layer thickness can be controlled and monitored automatically.
  • the entire underwater diffuser system can be moved using windlasses after the required layer thickness has been reached. This process can also be automated.
  • the fine material is to be introduced as a sealing material with an appropriate dismantling progress (Fig. 1), first a final depth is created with a mining device, then with the progressive dismantling, the sea floor 12 or the embankment 13 that is released becomes part of the process sealed the system. Until the final depth is reached, the very fine material can also be deposited on land in polder basins or containers 14 (FIGS. 1 and 4) (landfill 31), in order then to be available for later sealing. As shown in FIG. 4, the sand and gravel material with the finest material comes from the dredger 1 to the processing system 3 'via a conveyor belt 33. Suitable fine material can also be fed to the collecting container 14 with the simultaneous addition of water to the diffuser 5 via the pump 32.
  • connection of the swimming station 6 takes place here via a section of a pipeline 15 laid on land, which then merges into the floating pipeline 4.
  • the method described is also suitable for lowering existing dredging lakes.
  • a second underwater diffuser 16 is also used, which is used depending on the mining plan.
  • This diffuser 16 is connected via the floating pipeline 4 to the collecting container 14 arranged on land.
  • the diffuser 5 shows how the diffuser 5 applies the finest material to the lake floor 12 and the embankment 13.
  • the grain size of this fine material is less than 100 » for example in a range between 0 and 63».
  • FIG. 7 shows the embodiment of such a swimming station 6.
  • This swimming station 6 is fastened to the lake floor 12 with the aid of an anchor 17.
  • the layer 19 of the finest material is applied by the diffuser 5.
  • FIG. 8 A possible embodiment for the diffuser 5 or 16 is shown in FIG. 8.
  • the diffuser has a conical part 20 which widens towards the bottom 12 and merges into a plate-shaped section 21.
  • the bottom of the diffuser has an abrasion plate 22 that slopes from the center to both sides and is designed at its edge as an impact plate 23.
  • the fine material is discharged with low turbulence via discharge openings 25.
  • the very fine material flows in in the direction of the arrow 28.
  • At the upper end of the conical tube 29 there is a screw-on flange 30.

Landscapes

  • Engineering & Computer Science (AREA)
  • General Engineering & Computer Science (AREA)
  • Mining & Mineral Resources (AREA)
  • Civil Engineering (AREA)
  • Structural Engineering (AREA)
  • Mechanical Engineering (AREA)
  • Environmental & Geological Engineering (AREA)
  • Ocean & Marine Engineering (AREA)
  • Underground Or Underwater Handling Of Building Materials (AREA)
  • Treatment Of Sludge (AREA)
  • Physical Or Chemical Processes And Apparatus (AREA)
EP90123525A 1990-01-20 1990-12-07 Verfahren und Vorrichtung zum Aufbringen von Feinstmaterial auf den Grund und die Böschungen des Nasstagebaus Expired - Lifetime EP0438683B1 (de)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
DE4001630 1990-01-20
DE4001630A DE4001630C1 (enrdf_load_stackoverflow) 1990-01-20 1990-01-20

Publications (2)

Publication Number Publication Date
EP0438683A1 EP0438683A1 (de) 1991-07-31
EP0438683B1 true EP0438683B1 (de) 1995-05-24

Family

ID=6398470

Family Applications (1)

Application Number Title Priority Date Filing Date
EP90123525A Expired - Lifetime EP0438683B1 (de) 1990-01-20 1990-12-07 Verfahren und Vorrichtung zum Aufbringen von Feinstmaterial auf den Grund und die Böschungen des Nasstagebaus

Country Status (4)

Country Link
US (1) US5150986A (enrdf_load_stackoverflow)
EP (1) EP0438683B1 (enrdf_load_stackoverflow)
AT (1) ATE123097T1 (enrdf_load_stackoverflow)
DE (2) DE4001630C1 (enrdf_load_stackoverflow)

Families Citing this family (17)

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US5428908A (en) * 1993-03-09 1995-07-04 Kerfoot; William B. Apparatus and method for subsidence deepening
US5775836A (en) * 1996-03-05 1998-07-07 Dean, Jr.; Americo Capping device for uniform capping of subaquatic sediments
EP0869224A1 (en) * 1997-03-28 1998-10-07 Van Oord Acz B.V. Method and device for dumping dredged materials
WO1998044207A1 (en) * 1997-03-28 1998-10-08 Van Oord Acz B.V. Method and device for dumping dredged materials
DE19900279C1 (de) * 1999-01-07 2001-02-01 Wolfgang Rohr Verfahren und Vorrichtung zur Rückgewinnung von Feinsand von einem schwimmenden Gewinnungsgerät
EP1698730B1 (de) * 2004-12-21 2009-09-30 Johann Bunte Bauunternehmung GmbH & Co. KG Verfahrbare Vorrichtung zum Verlegen von Ton auf dem Grund von Kanälen
US7695215B2 (en) * 2008-06-06 2010-04-13 J.F. Brennan Co., Inc. Method and system for broadcast sediment capping
CN101429773A (zh) * 2008-12-05 2009-05-13 郑星昱 扰沙系统及方法
WO2011156867A1 (en) * 2010-06-18 2011-12-22 Nautilus Minerals Pacific Pty Ltd A system for seafloor mining
ITTO20110551A1 (it) * 2011-06-23 2012-12-24 Trevi Spa Procedimento per impermeabilizzare casse di colmata
US9162263B2 (en) 2011-12-22 2015-10-20 Sevenson Environmental Services, Inc. Barge system for hydraulic spreading of aquatic capping material
CN104264729B (zh) * 2014-09-09 2016-05-18 浙江海洋学院 一种lng绞吸挖泥船
IT201900007839A1 (it) * 2019-06-03 2020-12-03 Bartolomeo Mongiardino Sistema per il dragaggio dei fondali sommersi
CN111501886B (zh) * 2020-05-12 2020-12-08 诸暨市智盈智能技术服务部 一种河道自动清淤设备
CN112359902B (zh) * 2020-10-15 2022-03-11 安徽博雅园林建筑有限公司 一种基于道路建设施工的节能环保的建筑施工用骨料开采机
CN113718702B (zh) * 2021-09-28 2023-02-17 上海市地矿工程勘察(集团)有限公司 一种河道开挖卸荷对既有隧道保护施工工艺
US12311418B2 (en) 2023-08-03 2025-05-27 Sevenson Environmental Services, Inc. System for the controlled distribution of aquatic capping material and the capture of dust and particulates

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FR665961A (fr) * 1928-08-03 1929-09-25 Moorbau G M B H Procédé et appareil pour la construction des canaux
US2880981A (en) * 1958-01-30 1959-04-07 Socony Mobil Oil Co Inc Method and system for producing oil tenaciously held in porous formations using a dredging operation
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FR1593900A (enrdf_load_stackoverflow) * 1968-12-02 1970-06-01
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US3731975A (en) * 1971-11-18 1973-05-08 Qva Corp Apparatus and process for undersea mining of mineral bearing sand and gravel
FR2268906B1 (enrdf_load_stackoverflow) * 1974-04-24 1976-10-08 Alsthom Cgee
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Also Published As

Publication number Publication date
DE4001630C1 (enrdf_load_stackoverflow) 1991-10-17
ATE123097T1 (de) 1995-06-15
EP0438683A1 (de) 1991-07-31
US5150986A (en) 1992-09-29
DE59009140D1 (de) 1995-06-29

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