CN113866833A - Method for detecting narrow working face and irregular working face by amplitude-frequency electric perspective technology - Google Patents
Method for detecting narrow working face and irregular working face by amplitude-frequency electric perspective technology Download PDFInfo
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- CN113866833A CN113866833A CN202111257083.9A CN202111257083A CN113866833A CN 113866833 A CN113866833 A CN 113866833A CN 202111257083 A CN202111257083 A CN 202111257083A CN 113866833 A CN113866833 A CN 113866833A
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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
- G01V3/02—Electric or magnetic prospecting or detecting; Measuring magnetic field characteristics of the earth, e.g. declination, deviation operating with propagation of electric current
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- G01V—GEOPHYSICS; GRAVITATIONAL MEASUREMENTS; DETECTING MASSES OR OBJECTS; TAGS
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Abstract
The invention provides a method for detecting a narrow working face and an irregular working face by an amplitude-frequency electric perspective technology, which comprises the following steps: the method comprises the steps that n launching points are arranged on a first roadway along the direction of the roadway, the distance interval between every two adjacent launching points is a first preset distance, and each launching point is used for arranging launching equipment; setting m receiving points corresponding to the transmitting points for each transmitting point in the first roadway, wherein the distance interval between every two adjacent receiving points is a second preset distance, and the receiving points are used for setting receiving equipment; sequentially acquiring receiving data of m receiving points corresponding to each transmitting point in the n transmitting points to obtain detection data of a first roadway; and drawing a detection result graph according to the detection data of the first roadway and the detection data of the second roadway, and judging whether the deep part of the detected working surface has low-resistance abnormity. The invention can solve the problem that the amplitude-frequency electric perspective technology cannot be applied to narrow working faces and irregular working faces.
Description
Technical Field
The invention relates to the technical field of working face bottom plate detection, in particular to a method for detecting a narrow working face and an irregular working face by an amplitude-frequency electric perspective technology.
Background
The amplitude-frequency electric perspective technology is based on the resistivity difference of rocks, a stable current is provided for the bottom of a power supply electrode of one roadway of a working face, and when the current passes through different coal strata or geological structures, the value of a current field received in the other roadway of the working face changes. By studying the change rule of the current field, a certain depth below the bottom plate of the working face can be determined, namely the form and the scale of the water-containing abnormal region in the depth range can be explained.
However, the interpretation depth of the amplitude-frequency electroscopy technology for detecting the low-resistance abnormity under the bottom plate of the working surface is half of the width of the working surface. The interpretation depth of each coal mine has different requirements for the detection, generally the interpretation depth is required to be more than or equal to 80 meters, so that the interpretation depth of a working surface with the width of less than 160 meters cannot reach the requirement of 80 meters at the lowest. For the working face with smaller mining width, the interpretation depth is more insufficient, and the detection value cannot be achieved. In addition, for an irregular working surface, the width change is large, and the final result diagram obtained by detection reflects the conductivity of different layers, so that the conductivity of the same depth cannot be clearly reflected.
Disclosure of Invention
In view of this, the invention provides a method for detecting a narrow working surface and an irregular working surface by using an amplitude-frequency electric perspective technology, which can solve the problem that the amplitude-frequency electric perspective technology cannot be applied to the narrow working surface and the irregular working surface.
The embodiment of the invention provides a method for detecting a narrow working surface and an irregular working surface by an amplitude-frequency electric perspective technology, which comprises the following steps:
the method comprises the steps that n emitting points are arranged on a first roadway along the direction of the roadway, the distance interval between every two adjacent emitting points is a first preset distance, each emitting point is used for arranging emitting equipment, and the emitting equipment is used for emitting detection signals;
setting m receiving points corresponding to the transmitting point for each transmitting point in the first roadway, wherein the distance interval between two adjacent receiving points is a second preset distance, the receiving points are used for setting receiving equipment, and the receiving equipment is used for receiving a detection signal sent by the transmitting equipment of the transmitting point;
sequentially acquiring the receiving data of m receiving points corresponding to each transmitting point in the n transmitting points to obtain the detection data of the first roadway;
according to the detection data of the first roadway and the detection data of the second roadway, drawing a detection result diagram, and according to the detection result diagram, judging whether the deep part of the detected working surface has low-resistance abnormality or not, wherein the acquisition process of the detection data of the second roadway is the same as that of the detection data of the first roadway, the first roadway is one roadway of the detected working surface, and the second roadway is the other roadway of the detected working surface.
In a possible implementation manner, the first preset distance is greater than or equal to 50 meters and less than or equal to 70 meters.
In a possible implementation manner, the second preset distance is greater than or equal to 5 meters and less than or equal to 20 meters.
In a possible implementation manner, the transmitting device includes a transmitting electrode and an infinite electrode, the transmitting electrode is disposed on the transmitting point, the infinite electrode is used for grounding, and a distance between the transmitting electrode and the infinite electrode is greater than or equal to a third preset distance.
In a possible implementation manner, the third preset distance is 3h, and h is a preset probing depth.
In a possible implementation manner, the transmitting device further includes a transmitter, and for any transmitting point, the transmitting electrode on the transmitting point, the transmitter and the infinity electrode are connected through a power supply line to form a transmitting loop, and the transmitting loop is used for providing a constant current of a preset current value.
In a possible implementation manner, the receiving device includes a receiving electrode M and a receiving electrode N, for any receiving point, the receiving electrode M and the receiving electrode N are arranged in parallel to the direction of the roadway, and the midpoint of the receiving electrode M and the receiving electrode N is located at the receiving point.
In a possible implementation manner, a distance interval between the receiving electrode M and the receiving electrode N is a fourth preset distance, and the fourth preset distance is greater than or equal to one fiftieth of the preset detection depth and less than or equal to one third of the preset detection depth.
In a possible implementation manner, the receiving device further includes a receiver, and the receiver, the receiving electrode M, and the receiving electrode N form a receiving loop.
In a possible implementation manner, the method is applied to a narrow working face or an irregular working face, the narrow working face refers to a working face in which the vertical distance between two roadways is less than twice of the preset detection distance, and the irregular working face refers to a working face in which the difference between the maximum value and the minimum value of the vertical distance between the two roadways is greater than a preset threshold value.
Compared with the prior art, the embodiment of the invention has the following beneficial effects:
the embodiment of the invention arranges the launching points and the plurality of receiving points corresponding to each launching point in the same tunnel, sequentially obtains the receiving data of the plurality of receiving points corresponding to each launching point aiming at any tunnel, obtains the detection data of the tunnel, draws a detection result diagram according to the detection data of two tunnels, and judges whether the deep part of the detected working surface has low-resistance abnormity according to the detection result diagram. The problem that the amplitude-frequency electric perspective technology cannot be applied to narrow working faces and irregular working faces can be solved.
Drawings
In order to more clearly illustrate the technical solutions in the embodiments of the present invention, the drawings needed to be used in the embodiments or the prior art descriptions will be briefly described below, and it is obvious that the drawings in the following description are only some embodiments of the present invention, and it is obvious for those skilled in the art to obtain other drawings based on these drawings without inventive exercise.
FIG. 1 is a schematic diagram of a prior art amplitude-frequency electrical perspective detection method;
FIG. 2 is a flowchart of an implementation of a method for detecting a narrow working surface and an irregular working surface by an amplitude-frequency radioscopy technology according to an embodiment of the present invention;
FIG. 3 is a schematic diagram illustrating the arrangement of emission points in a method for detecting a narrow working surface and an irregular working surface by amplitude-frequency fluoroscopy technology according to an embodiment of the present invention;
fig. 4a is a schematic layout diagram of m receiving points corresponding to one transmitting point in the method for detecting a narrow working surface and an irregular working surface by using an amplitude-frequency radioscopy technology according to an embodiment of the present invention;
fig. 4b is a schematic layout diagram of m receiving points corresponding to one transmitting point in the method for detecting a narrow working surface and an irregular working surface by using an amplitude-frequency radioscopy technology according to the embodiment of the present invention;
fig. 5 is a schematic layout diagram of receiving electrodes M and receiving electrodes N on one receiving point in the method for detecting a narrow working surface and an irregular working surface by amplitude-frequency fluoroscopy technology according to the embodiment of the present invention.
Detailed Description
In the following description, for purposes of explanation and not limitation, specific details are set forth, such as particular system structures, techniques, etc. in order to provide a thorough understanding of the embodiments of the invention. It will be apparent, however, to one skilled in the art that the present invention may be practiced in other embodiments that depart from these specific details. In other instances, detailed descriptions of well-known systems, devices, circuits, and methods are omitted so as not to obscure the description of the present invention with unnecessary detail.
In order to make the objects, technical solutions and advantages of the present invention more apparent, the following description is made by way of specific embodiments with reference to the accompanying drawings.
Fig. 1 is a schematic diagram of a detection method of a conventional amplitude-frequency electrical perspective technology, which is detailed as follows:
the amplitude-frequency electric perspective technology is based on the electric property difference of rocks and ores and is used for observing and researching the distribution rule of an artificial current field. In the prior art testing process, as shown in fig. 1, the transmitting electrodes are disposed in one lane of the working surface and the receiving electrodes are disposed in the other lane of the working surface. The geological abnormal conditions such as water bearing property of the bottom plate of the working face in a certain range, namely the depth range of one half of the width of the working face, can be detected before the working face is recovered.
However, the conventional measurement method has a problem that, in the embodiment of the present invention, since the detection depth that can be detected by the conventional method, which may also be referred to as an interpretation depth, is one-half of the width of the working surface in conjunction with fig. 1, when the working surface is a narrow working surface, that is, the width of the working surface is small, the detection depth cannot reach the required depth by the conventional detection method, for example, the required detection depth is 80 meters, the width of the working surface is at least 160 meters by the conventional detection method, and if the width of the working surface is less than 160 meters, the detection cannot be detected by the conventional detection method. In another case, the working surface shown in fig. 1 is a working surface with a regular shape, and if the shape of the working surface is irregular, the width of two roadways may be changed greatly, and the conductivity of different layers actually reflected by the final result map cannot clearly reflect the conductivity of the same depth.
In view of the above problem, with reference to fig. 2, an embodiment of the present invention provides a method for detecting a narrow working surface and an irregular working surface by using an amplitude-frequency radioscopy technology, where the method is implemented by the following processes:
in step 201, n emitting points are arranged in a first roadway along the direction of the roadway, the distance interval between two adjacent emitting points is a first preset distance, each emitting point is used for arranging emitting equipment, and the emitting equipment is used for emitting a detection signal.
In the embodiment of the present invention, fig. 3 is a schematic layout diagram of emission points in a method for detecting a narrow working surface and an irregular working surface by using an amplitude-frequency fluoroscopy technology according to the embodiment of the present invention.
The working face generally includes an upper lane and a lower lane, and in the embodiment of the present invention, the first lane refers to one lane, such as an upper lane, and the second lane refers to another lane outside the first lane, such as a lower lane. The embodiment of the invention does not limit the first roadway and the second roadway.
With reference to fig. 3, a launching point is set in each first preset distance of the first roadway, and in a possible implementation manner, the first preset distance is greater than or equal to 50 meters and less than or equal to 70 meters.
For example, the first preset distance may be 60 meters, and in conjunction with fig. 3, one emission point is set every 60 meters, and n emission points are set according to the actual situation of the roadway and are respectively recorded as emission points a1 and a2 … … An.
In step 202, m receiving points corresponding to the transmitting point are set for each transmitting point in the first tunnel, the distance interval between two adjacent receiving points is a second preset distance, the receiving points are used for setting receiving equipment, and the receiving equipment is used for receiving a detection signal sent by the transmitting equipment of the transmitting point.
In the embodiment of the present invention, in conjunction with fig. 4a and 4b, m receiving points are respectively set for each transmitting point. In FIG. 4a, m reception points set for transmission point A1 are exemplarily shown, and in FIG. 4b, m reception points set for transmission point A2 are exemplarily shown. Emission point 1 in FIG. 4a is emission point A1, and emission point 2 in FIG. 4b is emission point A2.
The distance between two adjacent receiving points in the m receiving points is a second preset distance, and the second preset distance is greater than or equal to 5 meters and smaller than or equal to 20 meters. In some embodiments, the second preset distance may be set to 10 meters.
The number of m can be determined according to the value of the second preset distance and the preset detection depth, that is, the detection depth required by the project.
For example, if the project requires the detection of the working surface within the depth range of 80 meters, the preset detection depth is 80 meters, and the detection distance is 160 meters according to the characteristics of the amplitude-frequency electric perspective technology. If the distance between each receiving point is 10 meters, for the transmitting point, taking the transmitting point a1 as an example, one receiving point is arranged at a distance of 10 meters from the transmitting point a1, one receiving point is arranged at a position of 20 meters from the receiving point … … 160, and m is 16 receiving points.
For the transmission point a2, 16 reception points corresponding to a2 are arranged in the same way.
By such a method, 16 receiving points corresponding to each transmitting point are arranged for the transmitting point.
In the embodiment of the present invention, with reference to fig. 5, the receiving apparatus includes a receiving electrode M and a receiving electrode N, for any receiving point, the receiving electrode M and the receiving electrode N are arranged parallel to the direction of the roadway, and the midpoint of the receiving electrode M and the receiving electrode N is located at the receiving point.
The distance between the receiving electrode M and the receiving electrode N is a fourth preset distance, and the fourth preset distance is greater than or equal to one fiftieth of the preset detection depth and less than or equal to one third of the preset detection depth.
Alternatively, the fourth preset distance may take an empirical value according to actual conditions.
Referring to fig. 5, a connecting line between two points of the receiving electrode M and the receiving electrode N is parallel to the direction of the roadway, and a midpoint of M and N is located at the receiving point, that is, the receiving electrode M and the receiving electrode N are disposed at two sides of the receiving point.
In some embodiments, the distance between receive electrode M and receive electrode N is 4 meters.
The receiving device further comprises a receiver, and at a receiving point, the receiver, the receiving electrode M and the receiving electrode N form a receiving loop.
In step 203, the received data of m receiving points corresponding to each transmitting point of the n transmitting points are sequentially obtained to obtain the detection data of the first tunnel.
In the embodiment of the invention, the transmitting equipment comprises a transmitting electrode and an infinite electrode, the transmitting electrode is arranged on a transmitting point, the infinite electrode is used for grounding, and the distance between the transmitting electrode and the infinite electrode is larger than or equal to a third preset distance. Wherein the third preset distance is 3h, and h is the preset detection depth.
The transmitting equipment further comprises a transmitter, aiming at any transmitting point, a transmitting electrode on the transmitting point, the transmitter and the infinite electrode are connected through a power supply line to form a transmitting loop, and the transmitting loop is used for providing constant current with preset current value.
For example, if the preset probing depth is 80 meters, in the whole testing process, the infinite electrode is arranged at a position far away from two roadways of the working surface, and meanwhile, the distance interval between the transmitting electrode and the infinite electrode is ensured to be greater than 3h, and when h is 80 meters, the distance interval between the transmitting electrode and the infinite electrode is ensured to be greater than or equal to 240 meters.
The test process of the detection data of the first tunnel is as follows:
the transmitting electrode is arranged at a1, and the transmitting electrode, the transmitter and the infinity electrode are electrically connected to form a transmitting loop to provide a constant current.
After the arrangement is completed, the probe signal transmitted by the transmitting device arranged at a1 is acquired at each receiving point, and m sets of received data are obtained, for example, when m is 16, 16 sets of received data corresponding to a1 are obtained.
After the measurement is completed by a1, the transmitting device may be moved to a2, the above measurement process is repeated to obtain m sets of received data corresponding to a2, and the above process is repeated until m sets of received data corresponding to each transmitting point are obtained.
And the received data of the m receiving points corresponding to each transmitting point jointly form the detection data of the first roadway.
And after the first roadway finishes measurement, detecting the other roadway, namely the second roadway, again according to the same method to obtain the detection data of the second roadway.
In step 204, a detection result map is drawn according to the detection data of the first roadway and the detection data of the second roadway, and whether the deep part of the detected working surface has low resistance abnormality is determined according to the detection result map, wherein the acquisition process of the detection data of the second roadway is the same as the acquisition process of the detection data of the first roadway, the first roadway is one roadway of the detected working surface, and the second roadway is the other roadway of the detected working surface.
And processing the detection data of the first roadway and the detection data of the second roadway, for example, processing the detection data through amplitude-frequency electric perspective data processing software to obtain a detection result diagram. Judging whether the deep part of the detected working surface has low resistance abnormity according to the detection result diagram
In the embodiment of the present invention, the acquisition process of the detection data of the second lane is the same as that of the first lane. In the embodiment of the present invention, the order of acquiring the detection data of the first lane and the detection data of the second lane is not limited. The method provided by the embodiment of the present invention may be used to obtain the detection data of the first tunnel first and then obtain the detection data of the second tunnel according to the same method, or may be used to obtain the detection data of the second tunnel first and then obtain the detection data of the first tunnel according to the same method.
The method provided by the embodiment of the invention is suitable for a narrow working face or an irregular working face, wherein the narrow working face refers to that the vertical distance between two roadways of the working face is less than twice of the preset detection distance, and the irregular working face refers to that the difference between the maximum value and the minimum value of the vertical distance between the two roadways of the working face is greater than the preset threshold value.
The embodiment of the invention arranges the launching points and the plurality of receiving points corresponding to each launching point in the same tunnel, sequentially obtains the receiving data of the plurality of receiving points corresponding to each launching point aiming at any tunnel, obtains the detection data of the tunnel, draws a detection result diagram according to the detection data of two tunnels, and judges whether the deep part of the detected working surface has low-resistance abnormity according to the detection result diagram. The problem that the amplitude-frequency electric perspective technology cannot be applied to narrow working faces and irregular working faces can be solved.
It should be understood that, the sequence numbers of the steps in the foregoing embodiments do not imply an execution sequence, and the execution sequence of each process should be determined by its function and inherent logic, and should not constitute any limitation to the implementation process of the embodiments of the present invention.
The above-mentioned embodiments are only used for illustrating the technical solutions of the present invention, and not for limiting the same; although the present invention has been described in detail with reference to the foregoing embodiments, it will be understood by those of ordinary skill in the art that: the technical solutions described in the foregoing embodiments may still be modified, or some technical features may be equivalently replaced; such modifications and substitutions do not substantially depart from the spirit and scope of the embodiments of the present invention, and are intended to be included within the scope of the present invention.
Claims (10)
1. A method for detecting a narrow working face and an irregular working face by an amplitude-frequency electric perspective technology is characterized by comprising the following steps:
the method comprises the steps that n emitting points are arranged on a first roadway along the direction of the roadway, the distance interval between every two adjacent emitting points is a first preset distance, each emitting point is used for arranging emitting equipment, and the emitting equipment is used for emitting detection signals;
setting m receiving points corresponding to the transmitting point for each transmitting point in the first roadway, wherein the distance interval between two adjacent receiving points is a second preset distance, the receiving points are used for setting receiving equipment, and the receiving equipment is used for receiving a detection signal sent by the transmitting equipment of the transmitting point;
sequentially acquiring the receiving data of m receiving points corresponding to each transmitting point in the n transmitting points to obtain the detection data of the first roadway;
according to the detection data of the first roadway and the detection data of the second roadway, drawing a detection result diagram, and according to the detection result diagram, judging whether the deep part of the detected working surface has low-resistance abnormality or not, wherein the acquisition process of the detection data of the second roadway is the same as that of the detection data of the first roadway, the first roadway is one roadway of the detected working surface, and the second roadway is the other roadway of the detected working surface.
2. The method of claim 1, wherein the first predetermined distance is greater than or equal to 50 meters and less than or equal to 70 meters.
3. The method of claim 1, wherein the second predetermined distance is greater than or equal to 5 meters and less than or equal to 20 meters.
4. The method of claim 1, wherein the transmitting device comprises a transmitting electrode and an infinite electrode, the transmitting electrode is disposed on the transmitting point, the infinite electrode is used for grounding, and a distance between the transmitting electrode and the infinite electrode is greater than or equal to a third preset distance.
5. The method of claim 4, wherein the third predetermined distance is 3h, where h is a predetermined probe depth.
6. The method of claim 4, wherein the transmitting device further comprises a transmitter, and for any transmitting point, the transmitting electrode on the transmitting point, the transmitter and the infinity electrode are connected through a power supply line to form a transmitting loop, and the transmitting loop is used for providing a constant current of a preset current value.
7. The method according to claim 1, characterized in that the receiving device comprises a receiving electrode M and a receiving electrode N, wherein for any receiving point, the receiving electrode M and the receiving electrode N are arranged parallel to the course of the roadway, and the midpoint of the receiving electrode M and the receiving electrode N is located at the receiving point.
8. The method according to claim 7, wherein the receiving electrode M and the receiving electrode N are separated by a fourth predetermined distance, wherein the fourth predetermined distance is greater than or equal to one fiftieth of the predetermined probing depth and less than or equal to one third of the predetermined probing depth.
9. The method of claim 7, wherein the receiving device further comprises a receiver, and wherein the receiver, the receiving electrode M, and the receiving electrode N form a receiving loop.
10. The method according to any one of claims 1 to 9, characterized in that it is applied to a narrow working face, i.e. a working face in which the vertical distance of the two lanes is less than twice the preset detection distance, or to an irregular working face, i.e. a working face in which the difference between the maximum and minimum of the vertical distances of the two lanes is greater than a preset threshold.
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