GB1446464A - Cutting rock material - Google Patents

Cutting rock material

Info

Publication number
GB1446464A
GB1446464A GB5182473A GB5182473A GB1446464A GB 1446464 A GB1446464 A GB 1446464A GB 5182473 A GB5182473 A GB 5182473A GB 5182473 A GB5182473 A GB 5182473A GB 1446464 A GB1446464 A GB 1446464A
Authority
GB
United Kingdom
Prior art keywords
rock
plasma
plasma stream
film
stream
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
GB5182473A
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.)
Humphreys Corp
Original Assignee
Humphreys Corp
Priority date (The priority date 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 date listed.)
Filing date
Publication date
Application filed by Humphreys Corp filed Critical Humphreys Corp
Priority to GB5182473A priority Critical patent/GB1446464A/en
Publication of GB1446464A publication Critical patent/GB1446464A/en
Expired legal-status Critical Current

Links

Classifications

    • E—FIXED CONSTRUCTIONS
    • E21—EARTH 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
    • E21D9/10—Making by using boring or cutting machines
    • E21D9/1073—Making by using boring or cutting machines applying thermal energy, e.g. by projecting flames or hot gases, by laser beams
    • E—FIXED CONSTRUCTIONS
    • E04—BUILDING
    • E04C—STRUCTURAL ELEMENTS; BUILDING MATERIALS
    • E04C3/00—Structural elongated elements designed for load-supporting
    • E04C3/30—Columns; Pillars; Struts
    • E04C3/34—Columns; Pillars; Struts of concrete other stone-like material, with or without permanent form elements, with or without internal or external reinforcement, e.g. metal coverings
    • E—FIXED CONSTRUCTIONS
    • E04—BUILDING
    • E04C—STRUCTURAL ELEMENTS; BUILDING MATERIALS
    • E04C5/00—Reinforcing elements, e.g. for concrete; Auxiliary elements therefor
    • E04C5/08—Members specially adapted to be used in prestressed constructions
    • E—FIXED CONSTRUCTIONS
    • E21—EARTH DRILLING; MINING
    • E21C—MINING OR QUARRYING
    • E21C37/00—Other methods or devices for dislodging with or without loading
    • E21C37/18—Other methods or devices for dislodging with or without loading by electricity

Abstract

1446464 Thermal-rock cutting HUMPHREYS CORP 8 Nov 1973 51824/73 Heading E1F [Also in Division H5] A method of cutting rock 12 involves the use of a plasma torch 20 to direct a plasma stream 86 against the rock and supplying through the plasma stream electrical power to further heat the rock. In one preferred embodiment the impinging of the plasma stream on the rock creates on the rock a molten film and in this film flowing electrical current both further heats the film and the rock underlying the film to form a cut in the rock. Preferably the plasma stream has a velocity of at least 3000 ft/sec, an additive may be supplied via the plasma stream to the molten rock to modify the characteristics thereof, and spalling of the heated rock may be enhanced by directing a jet of coolant fluid against the rock. In the other preferred embodiment dielectric heating and thermal stressing of the rock between two cuts is caused by applying an A.C. voltage of a suitable frequency across the plasma streams of two plasma torches, the streams providing the necessary electrical contact between the electrical supply and rock at the bottoms of the cuts. Preferably the voltage gradient is in the range of 750-7500 volts/inch and the velocity of each plasma stream is in excess of 20 ft./sec. The two procedures may be applied sequentially to the rock. U.S. Specification 3214623 is referred to.
GB5182473A 1973-11-08 1973-11-08 Cutting rock material Expired GB1446464A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
GB5182473A GB1446464A (en) 1973-11-08 1973-11-08 Cutting rock material

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
GB5182473A GB1446464A (en) 1973-11-08 1973-11-08 Cutting rock material

Publications (1)

Publication Number Publication Date
GB1446464A true GB1446464A (en) 1976-08-18

Family

ID=10461512

Family Applications (1)

Application Number Title Priority Date Filing Date
GB5182473A Expired GB1446464A (en) 1973-11-08 1973-11-08 Cutting rock material

Country Status (1)

Country Link
GB (1) GB1446464A (en)

Cited By (8)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO2001002692A1 (en) * 1999-07-02 2001-01-11 Heerema Holding Construction Inc. Jet excavating device
NL1016917C2 (en) * 1999-07-02 2002-10-08 Heerema Holding Construction I Excavating device for forming channel in ground has assembly of jet excavating units defining cross section of channel, with sensor connected to at least one unit for measuring force exerted by ground
NL1016952C2 (en) * 1999-07-02 2002-10-15 Heerema Holding Construction I Excavating device for forming channel in ground has assembly of jet excavating units defining cross section of channel, with sensor connected to at least one unit for measuring force exerted by ground
US20190017380A1 (en) * 2017-01-18 2019-01-17 Dalian University Of Technology Laser-assisted tunnel boring machine and rock fragmenting method therefor
US10584585B2 (en) 2016-11-15 2020-03-10 Arcbyt, Inc. Tunneling for underground power and pipelines
WO2020101666A1 (en) * 2018-11-14 2020-05-22 Arcbyt, Inc. Tunneling for underground power and pipelines
US11136886B1 (en) 2021-01-12 2021-10-05 EarthGrid PBC Tunnel boring system
EP4026983A1 (en) * 2021-01-12 2022-07-13 EarthGrid PBC Tunnel boring system

Cited By (15)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US6385868B2 (en) 1999-07-02 2002-05-14 Heerema Holding Construction Inc. Jet excavating device
NL1016917C2 (en) * 1999-07-02 2002-10-08 Heerema Holding Construction I Excavating device for forming channel in ground has assembly of jet excavating units defining cross section of channel, with sensor connected to at least one unit for measuring force exerted by ground
NL1016952C2 (en) * 1999-07-02 2002-10-15 Heerema Holding Construction I Excavating device for forming channel in ground has assembly of jet excavating units defining cross section of channel, with sensor connected to at least one unit for measuring force exerted by ground
WO2001002692A1 (en) * 1999-07-02 2001-01-11 Heerema Holding Construction Inc. Jet excavating device
US11142957B2 (en) 2016-11-15 2021-10-12 Arcbyt, Inc. Tunneling for underground power and pipelines
US11655680B2 (en) 2016-11-15 2023-05-23 Arcbyt, Inc. Tunneling for underground power and pipelines
US10584585B2 (en) 2016-11-15 2020-03-10 Arcbyt, Inc. Tunneling for underground power and pipelines
US10648334B2 (en) * 2017-01-18 2020-05-12 Dalian University Of Technology Laser-assisted tunnel boring machine and rock fragmenting method therefor
US20190017380A1 (en) * 2017-01-18 2019-01-17 Dalian University Of Technology Laser-assisted tunnel boring machine and rock fragmenting method therefor
EP3679219A4 (en) * 2018-11-14 2020-07-15 Arcbyt, Inc. Tunneling for underground power and pipelines
WO2020101666A1 (en) * 2018-11-14 2020-05-22 Arcbyt, Inc. Tunneling for underground power and pipelines
US11136886B1 (en) 2021-01-12 2021-10-05 EarthGrid PBC Tunnel boring system
EP4026983A1 (en) * 2021-01-12 2022-07-13 EarthGrid PBC Tunnel boring system
US11591909B2 (en) 2021-01-12 2023-02-28 EarthGrid PBC Tunnel boring system
EP4328417A3 (en) * 2021-01-12 2024-04-24 EarthGrid PBC Tunnel boring system

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Legal Events

Date Code Title Description
CSNS Application of which complete specification have been accepted and published, but patent is not sealed