FR2468921B1 - IMPROVEMENTS IN PROCESSES AND APPARATUSES FOR DETERMINING THE CONDITIONS AND THE HOMOGENEITY OF THE STRUCTURE OF A COAL Vein - Google Patents
IMPROVEMENTS IN PROCESSES AND APPARATUSES FOR DETERMINING THE CONDITIONS AND THE HOMOGENEITY OF THE STRUCTURE OF A COAL VeinInfo
- Publication number
- FR2468921B1 FR2468921B1 FR8019297A FR8019297A FR2468921B1 FR 2468921 B1 FR2468921 B1 FR 2468921B1 FR 8019297 A FR8019297 A FR 8019297A FR 8019297 A FR8019297 A FR 8019297A FR 2468921 B1 FR2468921 B1 FR 2468921B1
- Authority
- FR
- France
- Prior art keywords
- homogeneity
- apparatuses
- processes
- determining
- conditions
- 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
Links
Classifications
-
- 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
- G01S13/00—Systems using the reflection or reradiation of radio waves, e.g. radar systems; Analogous systems using reflection or reradiation of waves whose nature or wavelength is irrelevant or unspecified
- G01S13/02—Systems using reflection of radio waves, e.g. primary radar systems; Analogous systems
- G01S13/06—Systems determining position data of a target
Landscapes
- Engineering & Computer Science (AREA)
- Radar, Positioning & Navigation (AREA)
- Remote Sensing (AREA)
- Computer Networks & Wireless Communication (AREA)
- Physics & Mathematics (AREA)
- General Physics & Mathematics (AREA)
- Radar Systems Or Details Thereof (AREA)
- Geophysics And Detection Of Objects (AREA)
- Amplifiers (AREA)
Applications Claiming Priority (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
US9058479A | 1979-11-02 | 1979-11-02 |
Publications (2)
Publication Number | Publication Date |
---|---|
FR2468921A1 FR2468921A1 (en) | 1981-05-08 |
FR2468921B1 true FR2468921B1 (en) | 1985-08-23 |
Family
ID=22223427
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
FR8019297A Expired FR2468921B1 (en) | 1979-11-02 | 1980-09-05 | IMPROVEMENTS IN PROCESSES AND APPARATUSES FOR DETERMINING THE CONDITIONS AND THE HOMOGENEITY OF THE STRUCTURE OF A COAL Vein |
Country Status (8)
Country | Link |
---|---|
JP (1) | JPS5667778A (en) |
AU (1) | AU518913B2 (en) |
CA (1) | CA1182547A (en) |
DE (1) | DE3037325C2 (en) |
FR (1) | FR2468921B1 (en) |
GB (1) | GB2061658B (en) |
PL (1) | PL131681B1 (en) |
ZA (1) | ZA805261B (en) |
Families Citing this family (6)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
AU580077B2 (en) * | 1985-04-03 | 1988-12-22 | Stolar, Inc. | Electromagnetic instruments and survey procedures for imaging structure in coal seams |
GB2304483B (en) * | 1995-08-18 | 2000-03-29 | London Electricity Plc | System for and method of determining the location of an object in a medium |
RU2138064C1 (en) * | 1998-10-06 | 1999-09-20 | Кисляков Юрий Вячеславович | Gear for under-surface radar sounding |
CN103809205B (en) * | 2014-02-27 | 2015-03-11 | 中国矿业大学(北京) | Travel time data fast collecting method for geological radar wave velocity chromatography prospecting |
CN103969691A (en) * | 2014-04-30 | 2014-08-06 | 安徽理工大学 | Mine working face detection system and method |
CN113550791B (en) * | 2021-07-15 | 2024-02-09 | 陕西麟北煤业开发有限责任公司 | Coal seam roof separation water detection method for coal mine control management |
Family Cites Families (10)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
FR1200597A (en) * | 1958-04-30 | 1959-12-22 | Method and device for the geological and mineralogical exploration of the surface layers of the soil | |
DE1208090B (en) * | 1964-02-15 | 1965-12-30 | Dr Helmut Roeschlau | Process and arrangement for continuous measurement of the fill level in bunkers and silos |
US3440523A (en) * | 1965-04-02 | 1969-04-22 | Inst Francais Du Petrole | Method and apparatus for electromagnetic determination of the position of boundaries of and discontinuities in a geological formation |
FR1519514A (en) * | 1965-04-16 | 1968-04-05 | Inst Francais Du Petrole | Method for measuring the lateral extent of a deposit and logging probe for its implementation |
FR2041016A1 (en) * | 1969-05-14 | 1971-01-29 | Inst Francais Du Petrole | |
US3831173A (en) * | 1969-12-17 | 1974-08-20 | Massachusetts Inst Technology | Ground radar system |
US3806795A (en) * | 1972-01-03 | 1974-04-23 | Geophysical Survey Sys Inc | Geophysical surveying system employing electromagnetic impulses |
US4008469A (en) * | 1974-08-06 | 1977-02-15 | Terrestrial Systems, Incorporated | Signal processing in short-pulse geophysical radar system |
US4072942A (en) * | 1976-02-20 | 1978-02-07 | Calspan Corporation | Apparatus for the detection of buried objects |
US4150576A (en) * | 1977-10-25 | 1979-04-24 | Energy And Minerals Research Co. | Mine roof and wall inspection apparatus and method |
-
1980
- 1980-08-07 GB GB8025761A patent/GB2061658B/en not_active Expired
- 1980-08-12 CA CA000358129A patent/CA1182547A/en not_active Expired
- 1980-08-13 AU AU61412/80A patent/AU518913B2/en not_active Ceased
- 1980-08-26 ZA ZA00805261A patent/ZA805261B/en unknown
- 1980-09-05 FR FR8019297A patent/FR2468921B1/en not_active Expired
- 1980-09-05 JP JP12246280A patent/JPS5667778A/en active Pending
- 1980-10-02 DE DE3037325A patent/DE3037325C2/en not_active Expired
- 1980-10-31 PL PL1980227596A patent/PL131681B1/en unknown
Also Published As
Publication number | Publication date |
---|---|
DE3037325C2 (en) | 1987-05-07 |
ZA805261B (en) | 1981-09-30 |
JPS5667778A (en) | 1981-06-08 |
FR2468921A1 (en) | 1981-05-08 |
AU6141280A (en) | 1981-05-14 |
GB2061658B (en) | 1984-08-22 |
GB2061658A (en) | 1981-05-13 |
CA1182547A (en) | 1985-02-12 |
PL227596A1 (en) | 1981-06-19 |
AU518913B2 (en) | 1981-10-29 |
PL131681B1 (en) | 1984-12-31 |
DE3037325A1 (en) | 1981-05-07 |
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Legal Events
Date | Code | Title | Description |
---|---|---|---|
ST | Notification of lapse |