CN106680882B - Detection system based on three-dimensional direct current electrical method data acquisition in space from top to bottom of well - Google Patents
Detection system based on three-dimensional direct current electrical method data acquisition in space from top to bottom of well Download PDFInfo
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- CN106680882B CN106680882B CN201611194710.8A CN201611194710A CN106680882B CN 106680882 B CN106680882 B CN 106680882B CN 201611194710 A CN201611194710 A CN 201611194710A CN 106680882 B CN106680882 B CN 106680882B
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- 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
- G01V3/20—Electric or magnetic prospecting or detecting; Measuring magnetic field characteristics of the earth, e.g. declination, deviation specially adapted for well-logging operating with propagation of electric current
- G01V3/22—Electric or magnetic prospecting or detecting; Measuring magnetic field characteristics of the earth, e.g. declination, deviation specially adapted for well-logging operating with propagation of electric current using dc
Abstract
A detection system based on underground space three-dimensional direct current electrical method data acquisition comprises a ground direct current electrical method host, a ground electrode, a vertical hole direct current electrical method host, a vertical hole electrode, a first mining level direct current electrical method host, a first mining level electrode, a second mining level direct current electrical method host and a second mining level electrode; the ground direct current electric method host, the vertical hole direct current electric method host, the first mining horizontal direct current electric method host and the second mining horizontal direct current electric method host are subjected to time synchronization through an internal crystal clock; the vertical bore is disposed perpendicular to and in communication with the ground, and the second mining level is located immediately below the first mining level. The method can obtain the direct current electric field data with high precision, the space above and below the well and the three-dimensional range, fully exert the advantage value of the direct current electric method, more accurately determine the geological abnormal body in the detection range and provide reliable geological data for the safe production of the coal mine.
Description
Technical Field
The invention relates to a detection system based on underground space three-dimensional direct current electrical method data acquisition.
Background
At present, the detection technology and equipment for the hidden disaster-causing geological factors of the coal mine are based on ground detection. The direct current method applied to the field of coal mine exploration mainly comprises a ground direct current method. Due to the influence of the volume effect of the direct current method, the vertical resolution and the transverse resolution of the ground direct current method are gradually reduced along with the increase of the detection depth, and the detection depth is limited (generally less than 200 m), so that the high-resolution detection requirement of a deep mine is difficult to meet. Due to the requirements of intrinsic safety and explosion suppression of mine equipment, the power supply current is generally not more than 100mA, the detection distance is small (generally not more than 100 m), the data signal-to-noise ratio is low, and the detection reliability is poor, so that underground direct current method detection is difficult to develop.
In summary, at present, the direct current method cannot fully exert the value of the direct current method in the aspect of geological detection in coal mine detection operation.
Disclosure of Invention
The invention provides a detection system based on underground space three-dimensional direct current method data acquisition, which can realize synchronous underground combined acquisition, three-dimensional dynamic detection and space comprehensive interpretation of a direct current method, fully exert the value of the direct current method in the detection field and provide sufficient and reliable guidance information for coal mine safety mining.
The technical scheme adopted by the invention is as follows:
a detection system based on underground space three-dimensional direct current electrical method data acquisition comprises a ground direct current electrical method host, a ground electrode, a vertical hole direct current electrical method host, a vertical hole electrode, a first mining level direct current electrical method host, a first mining level electrode, a second mining level direct current electrical method host and a second mining level electrode; the ground direct current method host and the ground electrodes are arranged on the ground, and the ground direct current method host is arranged between any two ground electrodes, is connected with the ground electrodes through a multi-core cable and is used for controlling the ground electrodes to supply power on the ground and receiving ground potential signals; the vertical hole direct current method host is arranged on the ground, the vertical hole electrode is arranged in a vertical hole, and the vertical hole direct current method host is connected with the vertical hole electrode through a cable and used for controlling the vertical hole electrode to supply power and receive potential signals in the vertical hole; the ground electrode is arranged in a two-dimensional mode of a measuring line or in a three-dimensional mode of a plurality of measuring lines and is positioned right above the target body to be detected; the first mining level direct current method host and the first mining level electrodes are arranged in a first mining level, arranged between any two first mining level electrodes and used for controlling power supply of the first mining level electrodes and receiving potential signals; the second mining level direct current method host and the second mining level electrodes are arranged in a second mining level, arranged between any two second mining level electrodes and used for controlling power supply of the second mining level electrodes and receiving potential signals; the ground direct current electric method host, the vertical hole direct current electric method host, the first mining horizontal direct current electric method host and the second mining horizontal direct current electric method host are subjected to time synchronization through an internal crystal clock; the vertical bore is disposed perpendicular to and in communication with the ground, and the second mining level is located immediately below the first mining level.
In the detection system based on the underground and up-and-down space three-dimensional direct current electrical method data acquisition, before data acquisition, the ground direct current electrical method host, the vertical hole direct current electrical method host, the first mining horizontal direct current electrical method host and the second mining horizontal direct current electrical method host are subjected to time synchronization through an internal crystal clock, and the time error is not more than 10 ms/d.
In the detection system based on the data acquisition of the vertical spatial direct current method, the power supply voltage and the power supply current of the ground direct current method host and the vertical hole direct current method host are comprehensively determined by the detection depth and the formation resistivity, and the power supply voltage and the power supply current of the first mining horizontal direct current method host and the second mining horizontal direct current method host are comprehensively determined by the detection distance and the formation resistivity.
In the detection system based on the data acquisition of the underground space stereo direct current method, the ground electrode, the vertical hole electrode, the first mining horizontal electrode and the second mining horizontal electrode are arranged at equal intervals, and the intervals are 5-15 m.
In the detection system based on the underground and up-and-down spatial three-dimensional direct current method data acquisition, the ground direct current method host, the vertical hole direct current method host, the first mining level direct current method host and the second mining level direct current method host perform spatial forward and backward calculation and analysis according to the coupling relation between all observation potentials and the target body or the abnormal body to be detected, so that comprehensive fine interpretation is realized.
In the detection system based on the underground and above spatial three-dimensional direct current electrical method data acquisition, the ground direct current electrical method host, the vertical hole direct current electrical method host, the first mining horizontal direct current electrical method host and the second mining horizontal direct current electrical method host carry out multiple synchronous spatial data acquisition through program control according to detection requirements, and the direct current electrical method three-dimensional dynamic detection and the spatial comprehensive interpretation are realized through comparing and analyzing multiple detection data and data interpretation results.
Compared with the prior art, the technical scheme of the invention has the following advantages:
(1) according to the detection system based on the underground spatial stereo direct current electrical method data acquisition, the space formed by the ground, the vertical hole and the upper and lower adjacent double mining levels of the coal mine is fully utilized to carry out spatial power supply and potential information acquisition, particularly, detection points are arranged in the mining level close to the upper part of the mining level at the same time, and the influence of detection depth and current control on resolution ratio can be effectively eliminated through the near field and the compensation of the horizontal direction and the inclination angle, so that the detection accuracy can be obviously improved through the underground synchronous combined acquisition and the spatial comprehensive interpretation, and the distribution conditions of stratum and geological abnormal bodies can be more intuitively reflected.
(2) According to the detection system based on the underground and upper space three-dimensional direct current method data acquisition, the ground direct current method host, the vertical hole direct current method host and the upper and lower two-party mining horizontal direct current method host can realize the direct current method three-dimensional dynamic detection through multiple synchronous spatial data acquisition and through multiple detection data and data interpretation results of contrastive analysis, and can perform four-dimensional mapping and dynamic interpretation on the basis of three-dimensional mapping, so that the space-time evolution rule and the disaster-causing danger degree of the stratum and the geological abnormal body under the mining disturbance condition can be accurately disclosed.
Drawings
In order to make the content of the present invention more clearly understood, the present invention is further described in detail below according to specific embodiments of the present invention and with reference to the attached drawings, and fig. 1 is a schematic structural diagram of a detection system based on the data acquisition of a downhole and upper space stereo dc electrical method according to the present invention.
Labeled as: 1-ground direct current method host, 2-ground electrode, 3-vertical hole direct current method host, 4-vertical hole electrode, 5-first mining level direct current method host, 6-first mining level electrode, 7-second mining level direct current method host, 8-second mining level electrode, 9-ground, 10-vertical hole, 11-first mining level, 12-second mining level.
Detailed Description
In order to make the objects, technical solutions and advantages of the present invention more apparent, embodiments of the present invention will be described in detail with reference to the accompanying drawings.
Fig. 1 shows a preferred embodiment of a detection system based on the vertical spatial direct current electrical method data acquisition in the well.
The detection system based on the underground space stereo direct current method data acquisition comprises a ground direct current method host machine 1, a ground electrode 2, a vertical hole direct current method host machine 3, a vertical hole electrode 4, a first mining horizontal direct current method host machine 5, a first mining horizontal electrode 6, a second mining horizontal direct current method host machine 7 and a second mining horizontal electrode 8; the ground direct current method host 1 and the ground electrodes 2 are arranged on the ground 9, the ground direct current method host 1 is arranged between any two ground electrodes 2, is connected with the ground electrodes 2 through a multi-core cable, and is used for controlling the ground electrodes 2 to supply power on the ground and receiving ground potential signals; the vertical hole direct current method host 3 is arranged on the ground 9, the vertical hole electrode 4 is arranged in a vertical hole 10, and the vertical hole direct current method host 3 is connected with the vertical hole electrode 4 through a cable and used for controlling the vertical hole electrode 4 to supply power and receive potential signals in the vertical hole 10; the ground electrode 2 is arranged in a two-dimensional mode of a measuring line or in a three-dimensional mode of a plurality of measuring lines and is positioned right above a target body to be detected; the first mining level direct current method host 5 and the first mining level electrodes 6 are arranged in a first mining level 11, arranged between any two first mining level electrodes 6 and used for controlling power supply of the first mining level electrodes 6 and receiving potential signals; the second mining level direct current method host 7 and the second mining level electrodes 8 are arranged in a second mining level 12, arranged between any two second mining level electrodes 8 and used for controlling power supply of the second mining level electrodes 8 and receiving potential signals; the ground direct current method host 1, the vertical hole direct current method host 3, the first mining horizontal direct current method host 5 and the second mining horizontal direct current method host 7 are time-synchronized through an internal crystal clock; the vertical bore 10 is arranged perpendicular to the ground 9 and in communication with the ground 9, and the second mining level 12 is located immediately below the first mining level 11.
In this embodiment, before data acquisition, the ground dc method host 1, the vertical hole dc method host 3, the first mining level dc method host 5, and the second mining level dc method host 7 perform time synchronization through an internal crystal clock, and a time error is not greater than 10 ms/d.
In this embodiment, the power supply voltage and the power supply current of the ground dc method main unit 1 and the vertical hole dc method main unit 3 are determined comprehensively by the detection depth and the formation resistivity, and the power supply voltage and the power supply current of the first mining level dc method main unit 5 and the second mining level dc method main unit 7 are determined comprehensively by the detection distance and the formation resistivity.
In this embodiment, the ground electrode 2, the vertical hole electrode 4, the first mining horizontal electrode 6 and the second mining horizontal electrode 8 are arranged at equal intervals, and the interval is 10 m.
In this embodiment, the ground dc electrical method main unit 1, the vertical hole dc electrical method main unit 3, the first mining level dc electrical method main unit 5, and the second mining level dc electrical method main unit 7 perform forward and backward spatial calculation and analysis according to the coupling relationship between all observation potentials and the target body or the abnormal body to be detected, thereby realizing comprehensive fine interpretation.
In this embodiment, the ground electrode 2 is arranged with the working face of the first mining level 11 in a pushing and rolling manner, the ground direct current method host 1, the vertical hole direct current method host 3, the first mining level direct current method host 5 and the second mining level direct current method host 7 perform multiple times of synchronous spatial data acquisition through program control under the condition that the working face of the first mining level 11 is pushed, and the direct current method three-dimensional dynamic detection and the spatial comprehensive interpretation are realized through comparing and analyzing multiple times of detection data and data interpretation results.
It should be understood that the above examples are only for clarity of illustration and are not intended to limit the embodiments. Other variations and modifications will be apparent to persons skilled in the art in light of the above description. And are neither required nor exhaustive of all embodiments. And obvious variations or modifications therefrom are intended to be within the scope of the invention.
Claims (6)
1. The utility model provides a detecting system based on three-dimensional direct current electrical method data acquisition in space about the pit which characterized in that: the device comprises a ground direct current method host (1), a ground electrode (2), a vertical hole direct current method host (3), a vertical hole electrode (4), a first mining horizontal direct current method host (5), a first mining horizontal electrode (6), a second mining horizontal direct current method host (7) and a second mining horizontal electrode (8);
the ground direct current method host (1) and the ground electrodes (2) are arranged on the ground (9), and the ground direct current method host (1) is arranged between any two ground electrodes (2), is connected with the ground electrodes (2) through a multi-core cable and is used for controlling the ground electrodes (2) to supply power on the ground and receiving ground potential signals;
the vertical hole direct current method host (3) is arranged on the ground (9), the vertical hole electrode (4) is arranged in a vertical hole (10), and the vertical hole direct current method host (3) is connected with the vertical hole electrode (4) through a cable and used for controlling the vertical hole electrode (4) to supply power and receive potential signals in the vertical hole (10);
the ground electrode (2) is arranged in a two-dimensional mode of a measuring line or in a three-dimensional mode of a plurality of measuring lines and is positioned right above the target body to be detected;
the first mining level direct current electric method main machine (5) and the first mining level electrodes (6) are arranged in a first mining level (11) and between any two first mining level electrodes (6) and used for controlling power supply of the first mining level electrodes (6) and receiving potential signals;
the second mining level direct current method main machine (7) and the second mining level electrodes (8) are arranged in a second mining level (12) and between any two second mining level electrodes (8) and used for controlling power supply of the second mining level electrodes (8) and receiving potential signals;
the ground direct current method host (1), the vertical hole direct current method host (3), the first mining horizontal direct current method host (5) and the second mining horizontal direct current method host (7) are subjected to time synchronization through internal crystal clocks;
the vertical bore (10) is arranged perpendicular to the ground (9) and communicates with the ground (9), and the second production level (12) is located immediately below the first production level (11).
2. The detection system based on the downhole spatial stereo direct current electrical method data acquisition according to claim 1, characterized in that: before data acquisition, the ground direct current method host (1), the vertical hole direct current method host (3), the first mining horizontal direct current method host (5) and the second mining horizontal direct current method host (7) are subjected to time synchronization through an internal crystal clock, and the time error is not more than 10 ms/d.
3. The detection system based on the downhole spatial stereo direct current electrical method data acquisition according to claim 1, characterized in that: the power supply voltage and the power supply current of the ground direct current method host (1) and the vertical hole direct current method host (3) are comprehensively determined by the detection depth and the formation resistivity, and the power supply voltage and the power supply current of the first mining level direct current method host (5) and the second mining level direct current method host (7) are comprehensively determined by the detection distance and the formation resistivity.
4. The detection system based on the downhole spatial stereo direct current electrical method data acquisition according to any one of claims 1 to 3, characterized in that: the ground electrode (2), the vertical hole electrode (4), the first mining horizontal electrode (6) and the second mining horizontal electrode (8) are arranged at equal intervals, and the intervals are 5-15 m.
5. The detection system based on the downhole spatial stereo direct current electrical method data acquisition according to any one of claims 1 to 3, characterized in that: the ground direct current electric method host (1), the vertical hole direct current electric method host (3), the first mining level direct current electric method host (5) and the second mining level direct current electric method host (7) perform spatial forward and backward calculation and analysis according to the coupling relation between all observation potentials and the target body or abnormal body to be detected, and comprehensive fine explanation is achieved.
6. The detection system based on the downhole spatial stereo direct current electrical method data acquisition according to any one of claims 1 to 3, characterized in that: the ground direct current electric method host (1), the vertical hole direct current electric method host (3), the first mining horizontal direct current electric method host (5) and the second mining horizontal direct current electric method host (7) perform multiple times of synchronous spatial data acquisition through program control according to detection requirements, and realize direct current electric method three-dimensional dynamic detection and spatial comprehensive interpretation through contrastive analysis of multiple times of detection data and data interpretation results.
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