Classifications

• • E—FIXED CONSTRUCTIONS
  • E21—EARTH OR ROCK DRILLING; MINING
  • E21D—SHAFTS; TUNNELS; GALLERIES; LARGE UNDERGROUND CHAMBERS
  • E21D9/00—Tunnels or galleries, with or without linings; Methods or apparatus for making thereof; Layout of tunnels or galleries
  • E21D9/06—Making by using a driving shield, i.e. advanced by pushing means bearing against the already placed lining
  • E21D9/0642—Making by using a driving shield, i.e. advanced by pushing means bearing against the already placed lining the shield having means for additional processing at the front end
  • E21D9/065—Making by using a driving shield, i.e. advanced by pushing means bearing against the already placed lining the shield having means for additional processing at the front end with devices for provisionally supporting the front face
• • E—FIXED CONSTRUCTIONS
  • E21—EARTH OR ROCK DRILLING; MINING
  • E21D—SHAFTS; TUNNELS; GALLERIES; LARGE UNDERGROUND CHAMBERS
  • E21D9/00—Tunnels or galleries, with or without linings; Methods or apparatus for making thereof; Layout of tunnels or galleries
  • E21D9/06—Making by using a driving shield, i.e. advanced by pushing means bearing against the already placed lining
  • E21D9/08—Making by using a driving shield, i.e. advanced by pushing means bearing against the already placed lining with additional boring or cutting means other than the conventional cutting edge of the shield
  • E21D9/0875—Making by using a driving shield, i.e. advanced by pushing means bearing against the already placed lining with additional boring or cutting means other than the conventional cutting edge of the shield with a movable support arm carrying cutting tools for attacking the front face, e.g. a bucket
  • E21D9/0879—Making by using a driving shield, i.e. advanced by pushing means bearing against the already placed lining with additional boring or cutting means other than the conventional cutting edge of the shield with a movable support arm carrying cutting tools for attacking the front face, e.g. a bucket the shield being provided with devices for lining the tunnel, e.g. shuttering

Definitions

• the invention relates to a propulsion shield with support for the working face by means of liquid and a device for temporary mechanical support.
• Propulsion shields with support for the working face through liquid are known, for example, from DE OS 22 27 083. They are used for driving in non-stable, rolling soils with a limited grain size.
• the propulsion In order to remove obstacles in the mining chamber or to replace tools on the cutting wheel, it may be necessary for the propulsion to be temporarily interrupted, for the supporting fluid in the mining chamber to be temporarily replaced by compressed air, and for the operating chamber to be walked on by the operating personnel.
• Installation flaps between the spokes of the tiller have the disadvantage that they severely restrict the passage cross-section for the excavated soil. Cohesive soil components can then easily clog the passages and bring the tunneling to a standstill.
• the shoring flaps arranged between the spokes are also not pressed against the working face. In the space between the flaps and the face, soil loosening from the face may fall and lead to the tiller being jammed.
• the invention is intended to solve the problem of equipping a schi ld with support for the working face by means of liquid with a temporary mechanical support device in such a way that the device drains off the loosened part Soil not hindered by the cutting wheel during the advance, the support plates can be pressed directly against the face and actively support the partial area of the face.
• the object is achieved by a sign as described in the characterizing part of claim 1.
• the through-sections of the cutting wheel are free of internals and the advantages of the open cutting wheel are maintained.
• the arrangement of the support device on the stationary rear wall of the excavation chamber enables the use of a drive for the support plates with a length that corresponds to the depth of the excavation chamber. Such drives are the prerequisite for the fact that the support plates can be pressed against the working face independently of the cutting wheel. Appropriate configurations of the support device are described in claims 2-4.
• openings in the support plate with diameters of approximately ⁇ 100 mm enables a more even application of compressed air to the face. Without the support plates having to be withdrawn, the face can be sealed again by means of these openings if necessary by briefly flooding the extraction chamber with support liquid.
• a hydraulic drive with a sleeve guide for the drive piston is proposed.
• the quiver guide prevents the
• the piston rods come into direct contact with the support liquid passed through in the extraction chamber.
• FIGS. 1-3 Show it:
• Fig. 1 is a view against an inventive Schi ld from the front of the cutting wheel
• Fig. 2 shows a section along the axis of propulsion through the shield according to the invention
• Schi ld 1 moves the cutting wheel 5 in the excavation chamber 2, with which the soil at the face 7 can be degraded.
• the degradation chamber 2 is delimited at the rear by a wall 3.
• the shield 1 is a hydroshield.
• the wall 3 is a baffle, behind which a second wall 4 is arranged, which forms an air chamber with the baffle in the upper region.
• the device 8 for mechanical support of the working face is arranged.
• the device 8 consists of drives 9, push rods 10 and the support plate 11.
• a hydraulic drive 9 is shown.
• the drive 9 is arranged in a quiver 13 which allows the drive 9 to be installed and removed independently of the operating conditions in the extraction chamber 2.
• the support plates 11 have openings 12 through which support liquid or compressed air can pass to the face.
• the support plates 11 are pressed by means of the drives 9 through the spaces 14 formed by the spokes 6 of the cutting wheel 5 against the face 7 in a fixed rest position of the cutting wheel 5.
• the working face 7 is not supported in the area of the lowermost intermediate space 15, since there is no need for support to accumulate in the ground material before raking the material.
• the support plate 11 is connected to the push rod 10 by a joint 16.

Landscapes

• Engineering & Computer Science (AREA)
• Mining & Mineral Resources (AREA)
• Environmental & Geological Engineering (AREA)
• Life Sciences & Earth Sciences (AREA)
• General Life Sciences & Earth Sciences (AREA)
• Geochemistry & Mineralogy (AREA)
• Geology (AREA)
• Excavating Of Shafts Or Tunnels (AREA)
• Soil Working Implements (AREA)

Priority Applications (1)

Applications Claiming Priority (2)

Publications (1)

Family

ID=6433508

Family Applications (1)

Country Status (3)

Cited By (1)

Families Citing this family (3)

Citations (3)

• 1991
  • 1991-06-08 DE DE4118907A patent/DE4118907C1/de not_active Revoked
• 1992
  • 1992-05-15 EP EP92908761A patent/EP0542942B1/de not_active Expired - Lifetime
  • 1992-05-15 WO PCT/DE1992/000404 patent/WO1992022731A1/de active IP Right Grant

Patent Citations (3)

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