CN103048691A - Small circle line transient electromagnetic (TEM) mountain land laying and measuring point returning method - Google Patents
Small circle line transient electromagnetic (TEM) mountain land laying and measuring point returning method Download PDFInfo
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- CN103048691A CN103048691A CN2013100030943A CN201310003094A CN103048691A CN 103048691 A CN103048691 A CN 103048691A CN 2013100030943 A CN2013100030943 A CN 2013100030943A CN 201310003094 A CN201310003094 A CN 201310003094A CN 103048691 A CN103048691 A CN 103048691A
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- 238000000034 method Methods 0.000 title claims abstract description 12
- 230000001052 transient effect Effects 0.000 title abstract description 4
- 238000004364 calculation method Methods 0.000 claims abstract description 3
- 238000011835 investigation Methods 0.000 claims description 3
- 238000001514 detection method Methods 0.000 description 7
- 238000010276 construction Methods 0.000 description 3
- 241000272165 Charadriidae Species 0.000 description 2
- 238000005516 engineering process Methods 0.000 description 2
- 238000005259 measurement Methods 0.000 description 2
- 230000009286 beneficial effect Effects 0.000 description 1
- 238000007796 conventional method Methods 0.000 description 1
- 238000010586 diagram Methods 0.000 description 1
- 230000005611 electricity Effects 0.000 description 1
- 238000012876 topography Methods 0.000 description 1
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Abstract
The invention discloses a small circle line transient electromagnetic (TEM) mountain land laying and measuring point returning method. A circle line is directly laid on a mountain slope by a square in the manner of avoiding topographical corners. Under rectangular coordinates, a computing method for a measuring point (x,z) and a returning point (x',z') is shown as follows: z'=z-(h+h'')=z-(hcos theta)+hsin theta tan theta)x'=x+hsin theta, wherein x is the coordinate of the measuring point relative to the starting point of a measuring line, y is the elevation of the measuring point, h is the TEM detecting depth at one point, and theta is an included angle between the mountain slope and the x axis of the coordinates. According to the method disclosed by the invention, very high detecting precision can be obtained without solidifying a wireframe; the wireframe can be conveniently carried; and the advantages of small circle line TEM mountain land detecting are fully exerted. The method can be applied to the field of geophysical prospecting, especially the field of electrical and electromagnetic prospecting.
Description
Technical field
The invention belongs to the geophysical survey field, be specifically related to a kind of electricity and electromagnetic prospecting method.
Background technology
Little loop line TEM(Transient Electro-Magnetic, TEM) technology in the mountain region is surveyed, have light and flexible, operating efficiency is high, is subjected to the little advantage of the influence of topography
[1]But the loop line that transmits and receives of little loop line TEM is made of flexible wire mostly, and loop line is difficult for accomplishing horizontally disposed on the earth's surface that rises and falls, and causes detection accuracy to descend; As wire frame is solidified
[2], neither be easy to carry, be used for horizontally disposed stilt or human body and also can exert an influence to measurement result, cause equally detection accuracy to descend.For this reason, designed a kind of method that loop line is laid and measuring point playbacks of being convenient to the mountain region construction.
Documents
[1]Yan S,Chen M S,Shi X X.Transient electromagnetic sounding using a5m square loop.Exploration Geophysics,2009,40(2):193-196
[2]http://www.vlongbiz.com/buyer/offerdetail/623f995246f0287eed9d638b8566b1a4.html
The flexible loop line of little loop line TEM is difficult for horizontally disposedly in mountain region exploration, causes detection accuracy to descend; As wire frame is solidified, neither be easy to carry, and also can exert an influence to measurement result for horizontally disposed stilt or human body, cause equally detection accuracy to descend, make little loop line TEM Detection Techniques can not bring into play fully the advantage that the mountain region is surveyed.
Summary of the invention
The object of the present invention is to provide a kind of little loop line TEM mountainous region lay out and measuring point method for homing, to improve detection accuracy and to need not to solidify wire frame, the construction that little loop line TEM mountain region is surveyed is more convenient.
In order to solve above technical matters, the technical solution adopted in the present invention is as follows.
Avoid the turning of landform, loop line is laid immediately on (Fig. 1, Fig. 2) on the hillside with square.Under the rectangular coordinate, the computing formula of the playback of measuring point (x, z) point (x', z') is as follows
z'＝z-(h'+h″)＝z-(hcosθ+hsinθtanθ) （1）
x'＝x+hsinθ
X is that coordinate, the y of the relative survey line starting point of measuring point are the elevation of measuring point in the formula, and h is certain constantly investigation depth of TEM, and θ is the angle (Fig. 2, Fig. 3) of hillside and coordinate x axle.
The present invention has beneficial effect by loop line laying method of the present invention and reaches measuring point and the computing method of playback point, can realize well the mountain region detection, the construction that little loop line TEM mountain region is surveyed is more convenient, has given full play to the advantage of little loop line TEM in the exploration of mountain region.
Description of drawings
Fig. 1 is the laying schematic top plan view of the little loop line TEM in mountain region.
Fig. 2 is that measuring point is laid and the playback diagrammatic cross-section.
Fig. 3 is the measuring point thin section schematic diagram that playbacks.
Code name is among the figure: 1. landform, 2. loop line, 3. measuring point, 4. underground certain point, 5. playback measuring point.
Embodiment
Below in conjunction with accompanying drawing the solution of the present invention is described in further detail.
In the little loop line TEM exploration in certain mountain region, measuring point is laid on the milder hillside, obtain the gradient (Fig. 2) on hillside by geodesic conventional method.The coordinate of one of them measuring point (Fig. 3) is (x, z)=(200m, 1260m), the investigation depth h=120m of t=5ms, the measuring point place angle of cut θ hillside and coordinate axis=30 °.By formula (1) as can be known
x'＝x+hsinθ＝200+120sin30°＝260m 。
Claims (1)
1. one kind little loop line TEM mountainous region lay out and measuring point method for homing, it is characterized in that: described laying method is the turning of avoiding landform, and loop line is laid immediately on the hillside with square; Described measuring point method for homing is under rectangular coordinate, and the computing method of the playback of measuring point (x, z) point (x', z') are as follows
z'＝z-(h'+h″)＝z-(hcosθ+hsinθtanθ)
x'＝x+hsinθ
Described x is the coordinate of the relative survey line starting point of measuring point, and y is the elevation of measuring point, and h is certain constantly investigation depth of TEM, and θ is the angle of hillside and coordinate x axle.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201310003094.3A CN103048691B (en) | 2013-01-05 | 2013-01-05 | A kind of little loop line TEM mountainous region lay out and measuring point method for homing |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201310003094.3A CN103048691B (en) | 2013-01-05 | 2013-01-05 | A kind of little loop line TEM mountainous region lay out and measuring point method for homing |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN103048691A true CN103048691A (en) | 2013-04-17 |
| CN103048691B CN103048691B (en) | 2016-02-24 |
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| Application Number | Title | Priority Date | Filing Date |
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| CN201310003094.3A Expired - Fee Related CN103048691B (en) | 2013-01-05 | 2013-01-05 | A kind of little loop line TEM mountainous region lay out and measuring point method for homing |
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Citations (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US20070007966A1 (en) * | 2005-07-08 | 2007-01-11 | Meyer David G | Active geophysical prospecting system |
| CN102419456A (en) * | 2011-06-30 | 2012-04-18 | 中国科学院地质与地球物理研究所 | Direct time domain processing method for transient electromagnetic sounding data |
-
2013
- 2013-01-05 CN CN201310003094.3A patent/CN103048691B/en not_active Expired - Fee Related
Patent Citations (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US20070007966A1 (en) * | 2005-07-08 | 2007-01-11 | Meyer David G | Active geophysical prospecting system |
| CN102419456A (en) * | 2011-06-30 | 2012-04-18 | 中国科学院地质与地球物理研究所 | Direct time domain processing method for transient electromagnetic sounding data |
Non-Patent Citations (3)
| Title |
|---|
| 张文权，等: "小回线瞬变电磁法在青海某些特殊地理景观区的应用", 《物探与化探》 * |
| 闫述，等: "瞬间电磁法的探测深度问题", 《地球物理学报》 * |
| 阴健康，等: "瞬变电磁法小发射回线探测装置及其应用", 《煤田地质与勘探》 * |
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| CN103048691B (en) | 2016-02-24 |
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Inventor after: Yan Shu Inventor after: Chen Mingsheng Inventor after: Xue Guoqiang Inventor after: Qiu Weizhong Inventor after: Di Qingyun Inventor after: Li Gang Inventor before: Yan Shu Inventor before: Chen Mingsheng |
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Granted publication date: 20160224 |