GB1057519A - Improvements in or relating to methods of locating underground cavities and fissures - Google Patents

Improvements in or relating to methods of locating underground cavities and fissures

Info

Publication number
GB1057519A
GB1057519A GB5288865A GB5288865A GB1057519A GB 1057519 A GB1057519 A GB 1057519A GB 5288865 A GB5288865 A GB 5288865A GB 5288865 A GB5288865 A GB 5288865A GB 1057519 A GB1057519 A GB 1057519A
Authority
GB
United Kingdom
Prior art keywords
discontinuity
extent
antennae
bore holes
bore
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
GB5288865A
Inventor
Dirk Jan Vermeulen
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.)
Rand Mines Ltd
Original Assignee
Rand Mines Ltd
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 Rand Mines Ltd filed Critical Rand Mines Ltd
Priority to GB5288865A priority Critical patent/GB1057519A/en
Publication of GB1057519A publication Critical patent/GB1057519A/en
Expired legal-status Critical Current

Links

Classifications

    • E—FIXED CONSTRUCTIONS
    • E21—EARTH OR ROCK DRILLING; MINING
    • E21B—EARTH OR ROCK DRILLING; OBTAINING OIL, GAS, WATER, SOLUBLE OR MELTABLE MATERIALS OR A SLURRY OF MINERALS FROM WELLS
    • E21B47/00—Survey of boreholes or wells
    • E21B47/02—Determining slope or direction
    • G—PHYSICS
    • G01—MEASURING; TESTING
    • G01S—RADIO DIRECTION-FINDING; RADIO NAVIGATION; DETERMINING DISTANCE OR VELOCITY BY USE OF RADIO WAVES; LOCATING OR PRESENCE-DETECTING BY USE OF THE REFLECTION OR RERADIATION OF RADIO WAVES; ANALOGOUS ARRANGEMENTS USING OTHER WAVES
    • G01S11/00—Systems for determining distance or velocity not using reflection or reradiation
    • G01S11/02—Systems for determining distance or velocity not using reflection or reradiation using radio waves
    • G01S11/06—Systems for determining distance or velocity not using reflection or reradiation using radio waves using intensity measurements
    • G—PHYSICS
    • G01—MEASURING; TESTING
    • G01V—GEOPHYSICS; GRAVITATIONAL MEASUREMENTS; DETECTING MASSES OR OBJECTS; TAGS
    • G01V3/00—Electric or magnetic prospecting or detecting; Measuring magnetic field characteristics of the earth, e.g. declination, deviation
    • G01V3/18—Electric or magnetic prospecting or detecting; Measuring magnetic field characteristics of the earth, e.g. declination, deviation specially adapted for well-logging
    • G01V3/30—Electric or magnetic prospecting or detecting; Measuring magnetic field characteristics of the earth, e.g. declination, deviation specially adapted for well-logging operating with electromagnetic waves

Landscapes

  • Physics & Mathematics (AREA)
  • Life Sciences & Earth Sciences (AREA)
  • Engineering & Computer Science (AREA)
  • Geology (AREA)
  • Remote Sensing (AREA)
  • Environmental & Geological Engineering (AREA)
  • General Life Sciences & Earth Sciences (AREA)
  • General Physics & Mathematics (AREA)
  • Geophysics (AREA)
  • Mining & Mineral Resources (AREA)
  • Electromagnetism (AREA)
  • Fluid Mechanics (AREA)
  • Geochemistry & Mineralogy (AREA)
  • Radar, Positioning & Navigation (AREA)
  • Geophysics And Detection Of Objects (AREA)

Abstract

1,057,519. Electrical geophysical prospecting. RAND MINES Ltd. Dec. 13, 1965, No. 52888/65. Heading G1N. In a method of detecting subterranean discontinuities, bore-holes 1 and 2, Fig. 1 are provided, down which, are hung coaxial cables 3 and 4, having bored centre-conductor ends to act as receiving and transmitting antennae respectively. The radiated frequencies are chosen in the range 50 to 5000 Kc/s, such that with the spacing used between the antennae, transmission is by means of the inductive field. If the antennae are lowered down the bore holes at equal depths D, the strength of the received signal, using constant transmitted strength varies according to C log 10 D, Fig. 3 (not shown). The interruption of the transmission path by a discontinuity, e.g. fissure, cavity or conducting body, causes a departure from this law, the extent of which gives the vertical extent of the discontinuity. Having established the position and extent of the discontinuity in the vertical plane, the antenna are again moved along the bore holes but at different depths, keeping transmission path length CD constant. This provides a cross bearing of the discontinuity, allowing its position to be determined. Alternatively a horizontal pattern of boreholes may be dug, Fig. 2, (not shown). The position of the discontinuity being determined by cross bearings between two pairs of bore holes.
GB5288865A 1965-12-13 1965-12-13 Improvements in or relating to methods of locating underground cavities and fissures Expired GB1057519A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
GB5288865A GB1057519A (en) 1965-12-13 1965-12-13 Improvements in or relating to methods of locating underground cavities and fissures

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
GB5288865A GB1057519A (en) 1965-12-13 1965-12-13 Improvements in or relating to methods of locating underground cavities and fissures

Publications (1)

Publication Number Publication Date
GB1057519A true GB1057519A (en) 1967-02-01

Family

ID=10465709

Family Applications (1)

Application Number Title Priority Date Filing Date
GB5288865A Expired GB1057519A (en) 1965-12-13 1965-12-13 Improvements in or relating to methods of locating underground cavities and fissures

Country Status (1)

Country Link
GB (1) GB1057519A (en)

Cited By (10)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4161687A (en) * 1977-09-12 1979-07-17 The United States Of America As Represented By The United States Department Of Energy Method for locating underground anomalies by diffraction of electromagnetic waves passing between spaced boreholes
US4266608A (en) * 1978-07-17 1981-05-12 Standard Oil Company (Indiana) Method for detecting underground conditions
US4577153A (en) * 1985-05-06 1986-03-18 Stolar, Inc. Continuous wave medium frequency signal transmission survey procedure for imaging structure in coal seams
US4691166A (en) * 1985-05-06 1987-09-01 Stolar, Inc. Electromagnetic instruments for imaging structure in geologic formations
USRE32563E (en) * 1985-05-06 1987-12-15 Stolar, Inc. Continuous wave medium frequency signal transmission survey procedure for imaging structure in coal seams
AU580077B2 (en) * 1985-04-03 1988-12-22 Stolar, Inc. Electromagnetic instruments and survey procedures for imaging structure in coal seams
USRE33458E (en) * 1985-05-06 1990-11-27 Stolar, Inc. Method for constructing vertical images of anomalies in geological formations
US5185578A (en) * 1990-01-17 1993-02-09 Stolar, Inc. Method for detecting anomalous geological zones by transmitting electromagnetic energy between spaced drillholes using different frequency ranges
EP2148224A1 (en) * 2008-07-23 2010-01-27 Nederlandse Organisatie voor toegepast-natuurwetenschappelijk Onderzoek TNO Determining earth properties
CN107036546A (en) * 2017-05-12 2017-08-11 北京中矿华沃科技股份有限公司 A kind of opencut drilling depth based on unmanned air vehicle technique determines device and method

Cited By (14)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4161687A (en) * 1977-09-12 1979-07-17 The United States Of America As Represented By The United States Department Of Energy Method for locating underground anomalies by diffraction of electromagnetic waves passing between spaced boreholes
US4266608A (en) * 1978-07-17 1981-05-12 Standard Oil Company (Indiana) Method for detecting underground conditions
AU580077B2 (en) * 1985-04-03 1988-12-22 Stolar, Inc. Electromagnetic instruments and survey procedures for imaging structure in coal seams
US4691166A (en) * 1985-05-06 1987-09-01 Stolar, Inc. Electromagnetic instruments for imaging structure in geologic formations
USRE32563E (en) * 1985-05-06 1987-12-15 Stolar, Inc. Continuous wave medium frequency signal transmission survey procedure for imaging structure in coal seams
US4742305A (en) * 1985-05-06 1988-05-03 Stolar, Inc. Method for constructing vertical images of anomalies in geological formations
US4577153A (en) * 1985-05-06 1986-03-18 Stolar, Inc. Continuous wave medium frequency signal transmission survey procedure for imaging structure in coal seams
USRE33458E (en) * 1985-05-06 1990-11-27 Stolar, Inc. Method for constructing vertical images of anomalies in geological formations
US5185578A (en) * 1990-01-17 1993-02-09 Stolar, Inc. Method for detecting anomalous geological zones by transmitting electromagnetic energy between spaced drillholes using different frequency ranges
EP2148224A1 (en) * 2008-07-23 2010-01-27 Nederlandse Organisatie voor toegepast-natuurwetenschappelijk Onderzoek TNO Determining earth properties
WO2010011143A2 (en) * 2008-07-23 2010-01-28 Nederlandse Organisatie Voor Toegepast- Natuurwetenschappelijk Onderzoek Tno Determining earth properties
WO2010011143A3 (en) * 2008-07-23 2011-01-06 Nederlandse Organisatie Voor Toegepast- Natuurwetenschappelijk Onderzoek Tno Determining earth properties
CN107036546A (en) * 2017-05-12 2017-08-11 北京中矿华沃科技股份有限公司 A kind of opencut drilling depth based on unmanned air vehicle technique determines device and method
CN107036546B (en) * 2017-05-12 2023-10-03 北京中矿华沃科技股份有限公司 Open pit mine drilling depth measuring device and method based on unmanned aerial vehicle technology

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