EP0170123B1 - Verfahren und Vorrichtung zum Abdichten von Dammbauwerken in untertägigen Strecken, insbesondere im Salzgebirge - Google Patents

Verfahren und Vorrichtung zum Abdichten von Dammbauwerken in untertägigen Strecken, insbesondere im Salzgebirge Download PDF

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Publication number
EP0170123B1
EP0170123B1 EP85108639A EP85108639A EP0170123B1 EP 0170123 B1 EP0170123 B1 EP 0170123B1 EP 85108639 A EP85108639 A EP 85108639A EP 85108639 A EP85108639 A EP 85108639A EP 0170123 B1 EP0170123 B1 EP 0170123B1
Authority
EP
European Patent Office
Prior art keywords
pressure
sealant
means according
dam
cavity
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
Application number
EP85108639A
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German (de)
English (en)
French (fr)
Other versions
EP0170123A3 (en
EP0170123A2 (de
Inventor
Christian Dr.-Ing. Schrimpf
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.)
Deutsche Gesellschaft Zum Bau und Betrieb Von Endlagern fur Abfallstoffe Mbh (dbe)
Original Assignee
Deutsche Gesellschaft Zum Bau und Betrieb Von Endlagern fur Abfallstoffe Mbh (dbe)
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Filing date
Publication date
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Publication of EP0170123A2 publication Critical patent/EP0170123A2/de
Publication of EP0170123A3 publication Critical patent/EP0170123A3/de
Application granted granted Critical
Publication of EP0170123B1 publication Critical patent/EP0170123B1/de
Expired legal-status Critical Current

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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
    • E21F17/00—Methods or devices for use in mines or tunnels, not covered elsewhere
    • E21F17/103—Dams, e.g. for ventilation

Definitions

  • the invention relates to a method and a device for sealing dam structures in underground routes, in particular in the salt mountains, according to the preambles of claims 1 and 3.
  • dams or dam structures in horizontal mines, have the task of sealing cavities against contamination media, which can be liquids or gases. Both the static and the sealing function are assigned to the dam building material. With regard to tightness, failures often occurred, particularly in potash and rock salt mining. These are primarily due to the fact that the conventional cross-sectional seals connected to the mountains cause cracks to form in the contact area between the dam and the mountains due to excessive tensile stresses.
  • Additional sealing elements serve either as a ring seal for sealing the contact zone on the circumference of the dam body or as a surface seal for sealing the entire cross section including the contact zone.
  • the sealant holds and seals in solid form, e.g. Bitumen or plastic sheets and / or metal foils, or in plastic to viscous form, e.g. Clay, bitumen or sand asphalt, by means of adhesive effect and their own material tightness on or between the impermeable static solids to be sealed.
  • solid form e.g. Bitumen or plastic sheets and / or metal foils
  • plastic to viscous form e.g. Clay, bitumen or sand asphalt
  • the sealants are in solid form, such as. B. rubber or plastic elements or in viscous form, such as. B. bitumen, under an overpressure compared to the pressure of the liquid or gaseous loading medium to be shut off. This overpressure prevents the medium from penetrating into contact joints. Any adhesive properties of the sealing material can support this sealing mechanism.
  • the overpressure of this type of seal with respect to the pressure of the media to be shut off can be generated by mechanically acting elements, for example hydraulic cylinders, hydrostatic overpressure action and physicochemical effects by swelling under overpressure development.
  • DE-C-195 434 shows a dam closure, in particular for salt mines, in which the shaft or the section in front of a dam door is covered with tubbing or masonry.
  • the dam door lies with its frame against a wedge ring.
  • the contact area between the wedge ring and the mountains is sealed by picotage.
  • the space between the tubbings and the mountains is filled with cement.
  • Air chambers are formed in the cementing behind the tubbing or the masonry, which are provided as examination and compression chambers and are used to examine the quality and reliability of the closure or the seal between the cement and the rock.
  • the chambers are filled with cement to restore a perfect seal, and another system of tubbings is added to create a new examination chamber. It is disadvantageous that a permanent seal cannot be achieved if salt solutions are not fully saturated due to the backwashing of the picotages.
  • DE-C-239 992 discloses a method and a device for securing mine rooms to be protected against drowned mine rooms of a salt mine.
  • a cushion made of a gaseous or liquid body which is indifferent to salts is provided between a dam door and the water or the lye. Air is proposed as gas and oil as liquid. A compressor maintains the air cushion. Since the sealing against gas pressure is extremely difficult and because of the different densities of air and brine, the gas cushion does not build up over the entire cross-section in salty or slightly inclined sections, a satisfactory sealing cannot be achieved.
  • DD-B-135 103 relates to a method for sealing sections in soluble rock layers.
  • a cavity section with material inert to the salt mountains (e.g. bitumen) and then with buffer liquor oversaturated with the salt mountains. Convection and diffusion are kept to a minimum by filling the cavity cross-section with piling and arranging barrier walls with staggered openings. The unsaturated lye is given the opportunity to be saturated.
  • an overpressure space that is filled with a material (silicone oil) that is inert to the mountains and the bitumen, alkali should be prevented from penetrating into the area of the sealing packs as long as the overpressure can be maintained.
  • the object of the present invention is to provide a method and a device of the type mentioned in the introduction in such a way that a self-sealing and maintenance-free seal with a very long service life is achieved both for normal loads and for pressure loads.
  • the problem solutions according to the invention ensure that there is always an excess pressure of sealant against pressure loads of a load medium (liquid and / or gas), both in the case of low and high pressure loads by the load medium. Due to the pressure connection according to the invention between the pressure shaft and the load medium section, the pressure in the sealing system changes directly with the pressure of the load medium, so that a sufficient overpressure is always set in a self-regulating manner. The use of pumps is unnecessary. The intended overpressure can therefore be maintained in the long term. Loss of sealant, e.g.
  • the device shown in the drawing (Fig. 1 and 2) for sealing dam structures in underground routes, especially in the salt mountains 1, has between a stationary abutment 2 and an auxiliary dam 4 on a cavity 6, which is filled with a liquid to viscous sealant 7 and has a pressure shaft 8, in which a column of sealant 10 stands with a height h.
  • the pressure shaft 8 is closed at the top.
  • the static abutment 2 is located on the side of the cavity 6 facing the section 12 to be protected, and the auxiliary dam 4 closes the cavity 6 against the section 14 with the load medium (liquid and / or gas) that may be expected.
  • the part of the pressure shaft located above the sealant column 10 is connected to the load medium section part 14 via a connecting bore 16.
  • the static abutment 2 according to FIG. 1 is designed as a parallel, mountain-connected abutment and the auxiliary dam as a parallel, mountain-connected dam.
  • Other known cross-sectional shapes of the abutment and the auxiliary dam, such as single or multiple truncated cones, teeth etc. are also possible.
  • any type of construction is possible that is able to absorb the pressure loads occurring through the mountains and gases or liquids and to dissipate them into the surrounding mountains.
  • FIG. 2 shows an example of a static abutment for gas or liquid pressure loads of approximately 100 bar in a quadruple frustoconical design, which is connected to the mountains in a non-positive or positive manner.
  • the abutment can have a length of approx. 13 m, for example, and can be made of concrete.
  • the auxiliary dam can be designed, for example, in the form of a single truncated cone due to the low pressure load caused by the sealant, and can be connected to the mountains in a non-positive or positive manner. It can have a length of approx. 4 m, for example, and can also be made of concrete.
  • a sliding layer 17 can be provided between the abutment or auxiliary dam and mountains of asphalt slabs.
  • cross-sectional seals 18 made of sand asphalt can be provided on the cavity side as well as on the auxiliary dam, as is shown schematically in FIG. 2.
  • the sealing device shown in the drawing acts as follows.
  • This overpressure P u also corresponds to the maximum differential pressure across the auxiliary dam, which is designed statically according to this differential pressure.
  • an overpressure is set which, compared to the overpressure, normally results in no pressure loading due to a loading fluid, which results from the respective standing height h F Fluid in the connection bore 16 resulting hydrostatic pressure
  • Equation (3) practically always applies to gaseous loading media.
  • sealant losses occur, for example due to relocation in the event of a load or due to penetration of sealant into cracks and the like, the losses being further favored by temperature-related viscosity reductions, these are automatically compensated for from the sealant column 10, which forms a sealant supply.
  • the sealing device described is therefore particularly suitable for repository mines in which elevated temperatures due to the heat of decay must be expected. Maintenance of the sealing device, which may no longer be accessible later, is therefore not necessary.
  • additional pipelines 19 can be provided for refilling sealant in the pressure shaft, in particular while the dam structure is being navigable.
  • such pipelines are not necessary.
  • Liquid to viscous substances such as bitumen and asphalt are used as sealants.
  • Asphalt from standard bitumen and limestone flour filler (density: 1.4 t / m 3 ) or heavy spar powder filler (density: 2.3 t / m3) can be used as a sealant, whereby the desired asphalt density can be set between the specified values using a suitable filler additive .
  • the density of a saturated salt solution depends on the composition and can be of the order of 1.35 t / m 3 .
  • the pressure shaft 8 is shown in the drawing as a shaft closed at the top. In principle, it can be of any desired height and can also be led to the surface of the earth 11, as is indicated by dashed lines in FIG.
  • the pressure shaft can be removed or piped. Piping will be carried out, in particular, for a run to the earth's surface.
  • the diameter of the pressure shaft can in principle be any. It essentially depends on the expected loss of sealant. With increasing diameter, the influence of the loss of sealant on the height of the sealant column h decreases.
  • the diameter can be 3 m, for example.
  • connection between the pressure shaft 8 and the section part 14 can, in addition to being a bore 16, as described above, also be constructed as sections 20 and shafts 22 which have been mined, as is shown in broken lines in FIG. 2.
  • connection whether as a bore or as a stretch and shaft, can - like the shaft - be expanded or piped.
  • connection between the upper part of the pressure shaft and the section part 14 can, in addition to a bore 16 or a shaft 20 and a section 22, also by a pipe connection 24 (shown in broken lines in FIG. 2) from the section part 14 through the auxiliary dam 4, through the cavity 6 and the shaft 8 take place in the shaft part located above the level of the sealant column 10.

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)
  • Sealing Devices (AREA)
  • Building Environments (AREA)
  • Sealing Material Composition (AREA)
EP85108639A 1984-07-28 1985-07-11 Verfahren und Vorrichtung zum Abdichten von Dammbauwerken in untertägigen Strecken, insbesondere im Salzgebirge Expired EP0170123B1 (de)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
DE3427978 1984-07-28
DE3427978A DE3427978C1 (de) 1984-07-28 1984-07-28 Verfahren und Vorrichtung zum Abdichten von Dammbauwerken in untertaegigen Strecken,insbesondere im Salzgebirge

Publications (3)

Publication Number Publication Date
EP0170123A2 EP0170123A2 (de) 1986-02-05
EP0170123A3 EP0170123A3 (en) 1986-08-13
EP0170123B1 true EP0170123B1 (de) 1988-10-12

Family

ID=6241877

Family Applications (1)

Application Number Title Priority Date Filing Date
EP85108639A Expired EP0170123B1 (de) 1984-07-28 1985-07-11 Verfahren und Vorrichtung zum Abdichten von Dammbauwerken in untertägigen Strecken, insbesondere im Salzgebirge

Country Status (5)

Country Link
US (1) US4712945A (es)
EP (1) EP0170123B1 (es)
CA (1) CA1233038A (es)
DE (1) DE3427978C1 (es)
ES (1) ES8700383A1 (es)

Families Citing this family (7)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4842444A (en) * 1987-10-09 1989-06-27 Tusco, Incorporated Method for displacing oxygen from a mine
DE10216105C1 (de) * 2002-04-12 2003-06-26 Montan Tech Gmbh Verfahren zur Abdichtung von untertägigen Hohlräumen gegen Gase und Flüssigkeiten im Salzgebirge
DE102006059478B3 (de) * 2006-12-14 2008-02-21 Technische Universität Bergakademie Freiberg Formstabile Blöcke zum Abdichten von Strecken im Salzgestein sowie Einbauverfahren hierfür
US7334644B1 (en) * 2007-03-27 2008-02-26 Alden Ozment Method for forming a barrier
AU2011282621B2 (en) 2010-07-30 2015-03-26 Fci Holdings Delaware, Inc. Engineered mine seal
CN103422886A (zh) * 2013-08-14 2013-12-04 中国神华能源股份有限公司 一种煤矿分布式地下水库的人工挡水坝及其筑坝方法
CN116481739B (zh) * 2023-04-20 2023-11-14 徐州中矿岩土技术股份有限公司 一种废弃矿井巷道储气用密封性检测装置

Family Cites Families (10)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE198375C (es) *
DE195434C (es) *
DE135103C (es) *
US3123977A (en) * 1964-03-10 Blast resistant water door
US4102138A (en) * 1974-06-12 1978-07-25 Bergwerksverband Gmbh Method for closing off a mine gallery especially for use to prevent spreading of underground explosions
SU919598A3 (ru) * 1974-07-29 1982-04-07 Оксидентал Петролеум Корпорейшн (Фирма) Способ подземной перегонки нефтеносного сланца
US3934219A (en) * 1974-09-11 1976-01-20 The United States Of America As Represented By The Secretary Of The Interior Acoustic method and apparatus for determining effectiveness of mine passage seal
US3927719A (en) * 1975-04-25 1975-12-23 Us Interior Remote sealing of mine passages
US4289354A (en) * 1979-02-23 1981-09-15 Edwin G. Higgins, Jr. Borehole mining of solid mineral resources
US4315657A (en) * 1980-03-17 1982-02-16 Occidental Oil Shale, Inc. Gas seal for an in situ oil shale retort and method of forming thermal barrier

Also Published As

Publication number Publication date
DE3427978C1 (de) 1985-05-15
ES546109A0 (es) 1986-10-16
CA1233038A (en) 1988-02-23
US4712945A (en) 1987-12-15
EP0170123A3 (en) 1986-08-13
ES8700383A1 (es) 1986-10-16
EP0170123A2 (de) 1986-02-05

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