Roadway advanced detection method, device and system, and storage medium

Abstract

The invention discloses a roadway advanced detection method, device and system, and a storage medium. The method comprises the following steps: S1, arranging four point power supplies; s2, when power is supplied to each point power supply, the potential difference between M and N is observed, equipotential bodies corresponding to observation points during power supply of each point power supply point are calculated, and intersection positions of spherical shells of the equipotential bodies at different positions of the heading head are obtained by intersecting the equipotential bodies; and meanwhile, different directions, positions and properties of the abnormal body are determined by analyzing the synchronism of the abnormal high resistance and the abnormal low resistance at the intersection positions. By adopting the technical scheme of the invention, the direction and the accurate position of an abnormal source can be distinguished, and the drilling cost, misjudgment and multiplicity of solutions are reduced.

Description

Technical Field

[0001] This invention belongs to the field of mine exploration technology, specifically relating to a method, device, system, and storage medium for advanced tunnel exploration during mine tunnel excavation. Background Technology

[0002] The current in a point power source field is radial, and its potential equipotential lines are spherical shells. By studying the potential difference and current changes at different observation points M and N, the apparent resistivity is calculated, and the location and orientation of anomalies are analyzed, providing safety assurance for mine tunneling. Traditional DC current methods in tunnel advance detection often use three point power sources. These three measuring points are arranged in a line about 0.5 meters apart at the tunnel face. Electrodes MN are moved backward to measure the potential change behind them, which is then converted into apparent resistivity. Isotropic analysis is used to determine low-resistivity anomalies. However, this method relies solely on drilling to verify the presence of anomalies ahead of the tunnel, resulting in multiple interpretations and significant construction losses for mines or construction units, wasting valuable drilling work. Summary of the Invention

[0003] To address the problems existing in the prior art, the present invention provides a method, device, system, and storage medium for advanced detection of roadways.

[0004] To achieve the above objectives, the present invention provides the following solution: A method for advance detection of roadways, comprising: Step S1: Set up power supplies at 4 points; Step S2: When power is supplied to each point, the potential difference between measuring points M and N is observed. At the same time, the apparent resistivity of the equipotential body corresponding to the observation point is calculated when the power supply is supplied to each point. By intersecting the equipotential bodies, the intersection positions of the equipotential body shells at different positions of the tunnel head are obtained. At the same time, by analyzing the synchronicity of the variation patterns of abnormal high and low resistance at each intersection position, the abnormal body is determined to come from different directions, locations and properties.

[0005] As a preferred option, the arrangement principle for the four power supply points is as follows: power supply point A1 is located at 0 meters on the right side of the tunneling head, power supply point A2 is located at the bottom plate of the left side of the tunneling head, power supply point A3 is located 5 meters behind the tunneling head, and power supply point A4 is located approximately 2 meters from the top plate at 0 meters of the tunneling head.

[0006] Preferably, in step S2, the equipotential spherical shells are intersected at the front, back, left, right, top, and bottom positions of the tunneling head to distinguish the direction, position, and nature of the abnormal body at the top, bottom, left, right, front, and back.

[0007] The present invention also provides a tunnel advance detection device, comprising: The first processing module is used to arrange four power supplies. The second processing module is used to observe the potential difference between measuring points M and N when power is supplied to each point, and to calculate the apparent resistivity of the equipotential body at the corresponding observation point when power is supplied to each point. By intersecting the equipotential bodies, the intersection positions of the equipotential body shells at different positions of the tunnel head are obtained. At the same time, by analyzing the synchronicity of the abnormal high and low resistance at each intersection position, the abnormal body is determined to come from different directions, locations and properties.

[0008] As a preferred option, the arrangement principle for the four power supply points is as follows: power supply A1 is located at 0 meters on the right side of the tunnel face, power supply A2 is located at the bottom of the left side of the tunnel face, power supply A3 is located 5 meters behind the tunnel face, and power supply A4 is located approximately 2 meters from the top of the tunnel face.

[0009] Preferably, the second processing module intersects the equipotential spherical shells at the front, rear, left, right, top, and bottom positions of the tunneling head, thereby distinguishing the direction, position, and nature of the abnormal body at the top, bottom, left, right, front, and rear.

[0010] The present invention also provides a tunnel advance detection system, comprising: a computer program for calculating apparent resistivity and generating graphs, wherein the computer program executes a tunnel advance detection method when run by the processor.

[0011] The present invention also provides software in which a computer program executes a tunnel advance detection method during runtime.

[0012] Compared with the prior art, the beneficial effects of the present invention are as follows: This invention uses four power supply points, located at two points at the tunnel excavation head, one on the left and one on the right, approximately 2 meters apart; one on the roof; and one 5 meters behind the excavation head. Their relative positions determine the location of any anomaly convergence. Through this four-point power supply advanced detection technology, the direction, nature, and location of the anomaly (up, down, left, right, front, and rear) can be identified, while simultaneously reducing unnecessary drilling waste. Attached Figure Description

[0013] To more clearly illustrate the technical solution of the present invention, the drawings used in the embodiments are briefly introduced below. Obviously, the drawings described below are only some embodiments of the present invention. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort.

[0014] Figure 1 This is a flowchart illustrating the power supply electrode arrangement for implementing the tunnel advance detection method of the present invention. Figure 2 The principle of four-point power supply advanced detection and anomaly localization is used; Figure 3The principle of four-point power supply advance detection and rear anomaly location; Figure 4 The principle of four-point power supply advance detection and lateral positioning; Figure 5 The principle of four-point power supply advance detection and lateral positioning; Figure 6 The principle of four-point power supply advance detection for top plate orientation positioning; Figure 7 The principle of positioning the base plate by detecting the four-point power supply in advance. Detailed Implementation

[0015] The technical solutions of the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of the present invention, and not all embodiments. Based on the embodiments of the present invention, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of the present invention.

[0016] To make the above-mentioned objects, features and advantages of the present invention more apparent and understandable, the present invention will be further described in detail below with reference to the accompanying drawings and specific embodiments.

[0017] Example 1 like Figure 1 As shown, the present invention provides a method for advance detection of roadways, comprising: Step S1: Set up power supplies at 4 points; Step S2: When power is supplied to each point, the potential difference between M and N is observed. At the same time, the equipotential body corresponding to the observation point is calculated when the power supply is supplied to each point. By intersecting the equipotential bodies, the intersection positions of the spherical shells of each equipotential body at different positions of the tunnel head are obtained. At the same time, by analyzing the synchronicity of the abnormal high and low resistance at each intersection position, the abnormal body is determined to come from different directions, locations and properties.

[0018] As one embodiment of the present invention, the arrangement principle of the four power supply points is as follows: power supply A1 is arranged at 0 meters away from the right side of the tunneling head, power supply A2 is arranged at the bottom plate of the left side of the tunneling head, power supply A3 is arranged 5 meters behind the tunneling head, and power supply A4 is arranged at approximately 2 meters from the top plate of the tunneling head.

[0019] Due to the different locations of each power supply point, the electric field distribution changes. The pattern of change is that the equipotential lines of each source field shift (the direction of displacement is left, right, up, down, forward, and backward). The electric field distribution radiates outwards from the four power supply points, forming a radial distribution around the center of each power supply point. When power is supplied to each power supply point separately, the potential difference between M and N is observed. Observations are performed at each observation point to observe the potential changes at different locations. The apparent resistivity at each observation point is calculated when power is supplied from each power supply point. Generally, for an equipotential body (spherical shell), the apparent resistivity of the spherical shell can be considered as a comprehensive reflection of the equipotential body. Anomalies are contained within the equipotential body. By aligning the intersections of various equipotential bodies, the intersection points of the spherical shells at different locations on the tunneling head (front, back, left, right, up, and down) are determined. By analyzing the synchronicity of the changes in high and low resistivity of the anomalies at each intersection point, the different directions, locations, and properties of the anomalies can be determined.

[0020] Using the electric field distribution of two power sources, A1 and A3, the potential distribution of each measuring point in the roadway is observed. The apparent resistivity value at different locations in the roadway is calculated using the potential difference. The calculated apparent resistivity of each measuring point, each power source, and each point power source is regarded as an equipotential spherical shell with a distance of MN. The equipotential spherical shells intersect, and the apparent resistivity at different intersection points increases or decreases synchronously, reflecting the high and low resistance characteristics at the intersection location. If there is a high or low resistance anomaly at the intersection location, the anomaly is unique at that intersection location and in that direction. First, the intersection location of the equipotential bodies between each power source is determined, and the corresponding MN measuring point is identified. Then, the apparent resistivity distribution curve of each power source with the measuring point is plotted. By analyzing the synchronicity of the change law of the apparent resistivity of the corresponding point source, the nature, direction, and location of the anomaly are determined.

[0021] Depend on Figure 2 As can be seen, the anomalies converge at the front of the roadway, and their locations are singular. This allows us to identify each leading convergence point, and thus determine the location of the apparent resistance point of the corresponding roadway spherical shell.

[0022] Assume there is a high-resistivity anomaly with an apparent resistivity of ρ 25m ahead of the tunnel. s2 , ρ s2 =50Ω·m, apparent resistivity of the background field is ρ s1 , ρ s1 =20Ω·m, MN=5m, each power supply point supplies power separately, and MN moves backward in 5m increments to detect each point. The apparent resistivity at each measuring point is calculated, yielding the corresponding values ​​for each power supply point: ρ sMN =k*U MN / I Where, ρ sMNThe apparent resistivity of the spherical shell represents the different power supply points at each measuring point. k = 4π / (1 / AM - 1 / AN) Where AM represents the distance from each power supply point to the M-level electrode; AN represents the distance from each power supply point to the N-level electrode; U MN MN represents the potential difference between them; I represents the supply current.

[0023] Similarly, by using the electric field distribution of the two power sources at points A1 and A3, the potential distribution of each measuring point in the roadway is observed. The apparent resistivity value at different locations in the roadway is calculated using the potential difference. Each apparent resistivity is regarded as an equipotential body (spherical shell) with a distance of MN. The equipotential resistivity spherical shells are intersected respectively. Each intersection point behind the tunnel head is found. The curve of the apparent resistivity distribution with the intersection position is the curve of the anomaly behind the roadway.

[0024] Depend on Figure 3 It is evident that the convergence of anomalies behind the tunnel excavation head can effectively identify interfering objects or anomalies exposed in the tunnel.

[0025] The anomalies converge at the rear of the roadway, and their location is singular. This allows us to find the convergence point behind each roadway, and thus determine the location of the apparent resistance point of the corresponding roadway spherical shell.

[0026] Similarly, by using the electric field distribution of the power sources at points A1 and A2, the potential distribution of each measuring point in the roadway is observed. The apparent resistivity value at different locations in the roadway is calculated using the potential difference. Each apparent resistivity is considered as an equipotential body (spherical shell) at a distance of MN. By using the equipotential resistivity spherical shells to intersect, each intersection point on the left and right sides of the tunnel head can be found. The curve of the apparent resistivity distribution with the intersection position is the abnormal curve on the left and right sides of the roadway.

[0027] The anomalies converge on the left and right sides of the roadway, and their locations are singular. This allows us to find each convergence point on the side of each roadway, and thus determine the location of the apparent resistance point of the corresponding roadway spherical shell.

[0028] Depend on Figure 4 , 5 As can be seen, the anomalies converge on the left and right sides of the tunnel excavation head, which allows for accurate location of lateral anomalies.

[0029] Similarly, by using the electric field distribution of the power sources at points A1 and A4, the potential distribution of each measuring point in the roadway is observed. The apparent resistivity value at different locations in the roadway is calculated using the potential difference. Each apparent resistivity is considered as an equisional spherical shell with a distance of MN. By intersecting the spherical shells with equal apparent resistivity, each intersection point above and below the excavation head can be found. The curve of the apparent resistivity distribution with the intersection position is the abnormal curve of the upper and lower parts of the roadway.

[0030] The anomalies converge at the top and bottom of the roadway, and their locations are singular. This allows us to find each convergence point on the side of each roadway, and thus determine the location of the apparent resistance point of the corresponding roadway spherical shell.

[0031] Depend on Figure 6 , 7 It is evident that the intersection of abnormal bodies at the tunnel excavation head and floor can determine the issues above and below.

[0032] Example 2 The present invention also provides a tunnel advance detection device, comprising: The first processing module is used to arrange four power supplies. The second processing module is used to observe the potential difference between M and N when power is supplied to each point, and to calculate the equipotential body corresponding to the observation point when power is supplied to each point. By intersecting the equipotential bodies, the intersection position of the spherical shells of each equipotential body at different positions of the tunnel head is obtained. At the same time, by analyzing the synchronicity of the abnormal high and low resistance at each intersection position, the abnormal body is determined to come from different directions, locations and properties.

[0033] As one embodiment of the present invention, the arrangement principle of the four power supply points is as follows: power supply A1 is arranged at 0 meters on the right side of the tunneling head, power supply A2 is arranged at the left side of the tunneling head at 2 meters on the right side, power supply A3 is arranged 5-10 meters behind the tunneling head, and power supply A4 is arranged at approximately 2 meters on the top plate at 0 meters from the tunneling head.

[0034] As one embodiment of the present invention, the second processing module converges the equipotential spherical shells at the front, rear, left, right, top, and bottom positions of the tunneling head, thereby distinguishing the direction, position, and nature of the abnormal body at the top, bottom, left, right, front, and rear.

[0035] Example 3 The present invention also provides a roadway advance detection system, comprising: a memory and a processor, wherein the memory stores a computer program executed by the processor, and the computer program performs a roadway advance detection method when executed by the processor.

[0036] Example 4 The present invention also provides a storage medium storing a computer program, which executes a roadway advance detection method when running.

[0037] The embodiments described above are merely preferred embodiments of the present invention and are not intended to limit the scope of the present invention. Various modifications and improvements made to the technical solutions of the present invention by those skilled in the art without departing from the spirit of the present invention should fall within the protection scope defined by the claims of the present invention.

Claims

1. A method for advance detection of roadways, characterized in that, include: Step S1: Set up power supplies at 4 points; Step S2: When power is supplied to each point, the potential difference between M and N is observed. At the same time, the apparent resistivity of the equipotential body at the observation point is calculated when the power supply is supplied to each point. By intersecting the equipotential bodies, the intersection positions of the equipotential body shells at different positions of the tunnel head are obtained. At the same time, by analyzing the synchronicity of the abnormal high and low resistance at each intersection position, the abnormal body is determined to come from different directions, locations and properties.

2. The tunnel advance detection method as described in claim 1, characterized in that, The arrangement principle of the four power supply points is as follows: power supply point A1 is located at 0 meters on the right side of the tunnel face, power supply point A2 is located on the bottom plate of the left side of the tunnel face, power supply point A3 is located 5 meters behind the tunnel face, and power supply point A4 is located approximately 2 meters from the top plate of the tunnel face at 0 meters.

3. The tunnel advance detection method as described in claim 2, characterized in that, In step S2, the equipotential spherical shells are intersected at the front, back, left, right, top, and bottom positions of the tunneling head to distinguish the direction, position, and nature of the abnormal body at the top, bottom, left, right, front, and rear.

4. A tunnel advance detection device, characterized in that, include: The first processing module is used to arrange four power supplies. The second processing module is used to observe the potential difference between each measuring point M and N in the roadway when power is supplied to each point. At the same time, it calculates the apparent resistivity of the equipotential body at the corresponding observation point when power is supplied to each point. By intersecting the equipotential bodies, the intersection position of the equipotential body shells at different positions of the tunneling head is obtained. At the same time, by analyzing the synchronous changes of abnormal high and low resistivity at each intersection position, the abnormal body is determined to come from different directions, locations and properties.

5. The tunnel advance detection device as described in claim 4, characterized in that, The principle for arranging the four power supply points is as follows: Point power supply A1 is located 0 meters from the right side of the tunneling head, point power supply A2 is located at the bottom plate of the left side of the tunneling head, point power supply A3 is located 5 meters behind the tunneling head, and point power supply A4 is located approximately 2 meters from the top plate of the tunneling head.

6. The tunnel advance detection device as described in claim 5, characterized in that, The second processing module intersects the equipotential spherical shells at the front, back, left, right, top, and bottom positions of the tunneling head, thereby distinguishing the direction, position, and nature of the abnormal body at the top, bottom, left, right, front, and rear.

7. A tunnel advance detection system, characterized in that, include: Electrode placement, apparent resistivity calculation, computer program, wherein the computer program, when run by the processor, executes the tunnel advance detection method as described in any one of claims 1-3.

8. The software, characterized in that, The computer program calculates apparent resistivity, and the computer program executes the tunnel advance detection method as described in any one of claims 1-3 when it runs.

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