CN-122018013-A - Borehole geological radar and transient electromagnetic space-time collaborative detection method and system

CN122018013ACN 122018013 ACN122018013 ACN 122018013ACN-122018013-A

Abstract

The invention discloses a borehole geological radar and transient electromagnetic space-time collaborative detection method and system, which relate to the technical field of mine safety detection and comprise the steps of establishing an advanced collaborative detection coordinate system of a borehole advanced collaborative detection system, and calculating time sequence compensation time based on a preset distance; the method comprises the steps of determining initial parameters and equivalent time positions of a borehole geological radar and borehole transient electromagnetic based on time sequence compensation time, constructing a geological anomaly collaborative inversion model of a borehole advanced collaborative detection system based on the initial parameters and the equivalent time positions, inverting three-dimensional coordinates of a geological anomaly to be detected, judging whether errors of the three-dimensional coordinates of the geological anomaly are in a preset range, and if so, fusing based on the first three-dimensional coordinates and the second three-dimensional coordinates to obtain a collaborative detection result of the geological anomaly to be detected. The invention relieves the technical problems of asynchronous space-time and low positioning precision of geological abnormal bodies and easy misjudgment of the existing single detection method.

Inventors

WANG YIHONG
YIN SHAN
Tong Minbo
LV WEIWEI
ZHANG FUXIANG
WANG YUN
Xie Chenyuan
GONG YINGLI

Assignees

陕西太合智能钻探有限公司

Dates

Publication Date: 20260512
Application Date: 20260202

Claims (10)

1. The method is characterized by being applied to a drilling advance collaborative detection system, wherein the drilling advance collaborative detection system comprises drilling geological radars and drilling transient electromagnetic waves which are arranged at intervals of a preset distance, and the method comprises the following steps: establishing an advanced collaborative detection coordinate system of the drilling advanced collaborative detection system, and calculating time sequence compensation time based on the preset distance; Determining initial parameters and equivalent moment positions of the borehole geological radar and the borehole transient electromagnetic based on the time sequence compensation time; Based on the initial parameters and the equivalent moment positions, constructing a geological abnormal body collaborative inversion model of the drilling advance collaborative detection system; Inverting three-dimensional coordinates of a geological anomaly to be detected based on the geological anomaly cooperative inversion model, wherein the three-dimensional coordinates of the geological anomaly to be detected comprise a first three-dimensional coordinate based on the borehole geological radar and a second three-dimensional coordinate based on the borehole transient electromagnetic; and judging whether the error of the three-dimensional coordinates of the geological abnormal body is in a preset range, and if so, fusing the three-dimensional coordinates based on the first three-dimensional coordinates and the second three-dimensional coordinates to obtain a collaborative detection result of the geological abnormal body to be detected.
2. The method of claim 1, wherein the advanced co-detection coordinate system comprises determining a borehole axis direction as a Y-axis and a forward direction of the borehole advanced co-detection system as a positive direction; The borehole geological radar is disposed ahead of the borehole transient electromagnetic in a forward direction along the borehole advanced co-detection system.
3. The method of claim 1, wherein calculating a timing compensation time based on the preset distance comprises: Δt comp =l/v Wherein Δt comp is the time sequence compensation time of the drilling transient electromagnetic relative to the drilling geological radar, l is the preset distance, and v is the advancing speed of the drilling advance cooperative detection system along the drilling axis direction.
4. A method according to claim 3, wherein the initial parameters and equivalent time positions of the borehole geological radar include: when t=0, the initial coordinate of the borehole geological radar is as follows When the signal transmitting time is t A,trans and the signal receiving time is t A,recv , then: The position of the drilling geological radar at the transmitting moment is: ; the position of the drilling geological radar at the receiving moment is as follows: ; equivalent moment position of the borehole geological radar: ; the initial parameters and equivalent time positions of the drilling transient electromagnetic comprise: When t=0, the borehole transient electromagnetic initial coordinate is When the signal transmitting time is t B,trans and the signal receiving time is t B,recv , then: the drilling transient electromagnetic is positioned at the transmitting moment: ; the drilling transient electromagnetic is positioned at the receiving moment: ; equivalent moment position of the drilling transient electromagnetic: ; In the formula, 。
5. The method of claim 4, wherein inverting three-dimensional coordinates of a geological anomaly to be detected based on the geological anomaly collaborative inversion model comprises: empirically calibrating formation relative permittivity Calculating propagation speed of electromagnetic pulse of borehole geological radar in medium Wherein c is the speed of light in vacuum; extracting double-pass time of a drilling geological radar reflected signal: ; Defining the coordinates of the geological abnormal body to be detected as And establishing a three-dimensional positioning equation of the geological abnormal body to be detected: Wherein, the method comprises the steps of, A Y-axis coordinate of the equivalent moment position of the borehole geological radar; According to the transverse detection range constraint and the borehole section geological constraint of the borehole geological radar, inverting to obtain a first three-dimensional coordinate of the borehole geological radar for positioning the geological anomaly to be detected 。
6. The method of claim 5, wherein inverting three-dimensional coordinates of a geological anomaly to be detected based on the geological anomaly collaborative inversion model, further comprises: According to different stratum conductivities sigma, calculating skin depth of the drilling transient electromagnetic field: If (if) The conductivity is changed to be consistent with the depth of the geological abnormal body to be detected, otherwise, the conductivity is changed until the conductivity is consistent with the depth of the geological abnormal body to be detected; In the formula, Is the magnetic permeability of the vacuum and is equal to the magnetic permeability of the vacuum, Delay time after power-off of the transmitting coil of the borehole transient electromagnetic; extracting peak delay time of borehole transient electromagnetic transient response curve ; Based on a field marking coefficient k of the rock stratum, establishing a depth positioning equation of the drilling transient electromagnetic to the abnormal body to be detected: ; inversion is carried out to obtain a second three-dimensional coordinate of the drilling transient electromagnetic for positioning the abnormal body to be detected as follows Wherein: , ; for the amount of Y-axis correction, The X-axis correction amount.
7. The method of claim 1, wherein the collaborative detection of the geologic anomaly to be detected comprises: In the formula, For the result of the co-detection, For the first three-dimensional coordinate of the first three-dimensional coordinate, Is the second three-dimensional coordinate.
8. A borehole geological radar and transient electromagnetic space-time cooperative detection system is characterized by being used for realizing the borehole geological radar and transient electromagnetic space-time cooperative detection method according to any one of claims 1-7, and is applied to a borehole advanced cooperative detection system, wherein the borehole advanced cooperative detection system comprises the borehole geological radar and the borehole transient electromagnetic which are arranged at intervals of a preset distance, and comprises a building module, a determining module, a building module, an inversion module and a fusion module, The establishing module is used for establishing an advanced collaborative detection coordinate system of the drilling advanced collaborative detection system and calculating time sequence compensation time based on the preset distance; The determining module is used for determining initial parameters and equivalent moment positions of the borehole geological radar and the borehole transient electromagnetic based on the time sequence compensation time; the construction module is used for constructing a geological abnormal body collaborative inversion model of the drilling advance collaborative detection system based on the initial parameters and the equivalent moment position; The inversion module is used for inverting three-dimensional coordinates of a geological anomaly to be detected based on the geological anomaly cooperative inversion model, wherein the three-dimensional coordinates of the geological anomaly to be detected comprise a first three-dimensional coordinate based on the borehole geological radar and a second three-dimensional coordinate based on the borehole transient electromagnetic; and the fusion module is used for judging whether the error of the three-dimensional coordinates of the geological abnormal body is in a preset range, and if so, the fusion module is used for carrying out fusion on the basis of the first three-dimensional coordinates and the second three-dimensional coordinates to obtain a collaborative detection result of the geological abnormal body to be detected.
9. An electronic device comprising a memory, a processor and a computer program stored on the memory and executable on the processor, the processor implementing the method according to any of claims 1-7 when executing the computer program.
10. A computer readable storage medium having stored therein program code which is callable by a processor to perform the method of any one of claims 1 to 7.

Description

Borehole geological radar and transient electromagnetic space-time collaborative detection method and system Technical Field The invention relates to the technical field of mine safety detection, in particular to a method and a system for collaborative detection of borehole geological radar and transient electromagnetic space-time. Background In the fields of underground engineering construction, mineral resource development, geological disaster prevention and control and the like, advanced drilling detection is a key technical means for acquiring underground geological information and identifying potential geological risks. The drilling geological radar and the drilling transient electromagnetic are two common geophysical detection technologies, and each drilling geological radar has the unique advantages that the drilling geological radar can accurately capture geometric form information of a geological body by means of high resolution characteristics, but is greatly influenced by formation electrical parameters, detection depth is limited in a high-conductivity stratum, and recognition sensitivity to low-resistance abnormal bodies is insufficient. In the prior art, a single detection mode is generally adopted for borehole geological radar and borehole transient electromagnetic, and space-time cooperative fusion of detection data is not realized. The detection instrument is in a motion state in a borehole, time difference exists between signal transmitting and receiving moments of the two detection units, the space observation positions are asynchronous, so that deviation exists in geological abnormal body coordinates obtained by respective inversion, meanwhile, the correlation of the two detection results cannot be effectively verified due to lack of geological abnormal body consistency criteria, the problem that repeated identification or missed judgment and misjudgment of the same geological abnormal body easily occur, the reliability of the detection results is seriously affected, and potential safety hazards are brought to subsequent engineering decisions. Disclosure of Invention In order to solve the technical problems in the prior art, the embodiment of the invention provides a borehole geological radar and transient electromagnetic space-time collaborative detection method and system. The technical scheme is as follows: The method comprises the steps of establishing a drilling geological radar and drilling transient electromagnetic coordinate system which are arranged at intervals of a preset distance, calculating time sequence compensation time based on the preset distance, determining initial parameters and equivalent time positions of the drilling geological radar and the drilling transient electromagnetic, constructing a geological abnormal body collaborative inversion model of the drilling advanced collaborative detection system based on the initial parameters and the equivalent time positions, inverting three-dimensional coordinates of a geological abnormal body to be detected based on the geological abnormal body collaborative inversion model, judging whether errors of the geological abnormal body three-dimensional coordinates are in a preset range or not based on the first three-dimensional coordinates and the second three-dimensional coordinates of the drilling transient electromagnetic coordinate system, and if so, fusing the geological abnormal body three-dimensional coordinates to be detected based on the first three-dimensional coordinates and the second three-dimensional coordinates to obtain collaborative detection results of the geological abnormal body to be detected. Optionally, the advanced co-detection coordinate system comprises the steps of determining the axis direction of a drilling hole as a Y axis and the advancing direction of the drilling hole advanced co-detection system as a positive direction, determining the horizontal direction vertical to the drilling hole as an X axis and the vertical direction vertical to the drilling hole as a Z axis, and arranging the drilling hole geological radar in front of the drilling hole transient electromagnetic in the advancing direction of the drilling hole advanced co-detection system. Optionally, calculating the timing compensation time based on the preset distance includes: Δtcomp=l/v Wherein Δt comp is the time sequence compensation time of the drilling transient electromagnetic relative to the drilling geological radar, l is the preset distance, and v is the advancing speed of the drilling advance cooperative detection system along the drilling axis direction. Optionally, the initial parameters and equivalent time positions of the borehole geological radar include: when t=0, the initial coordinate of the borehole geological radar is as follows When the signal transmitting time is t A,trans and the signal receiving time is t A,recv, then: The position of the drilling geological radar at the transmitting moment is: ; the position