CN-121995503-A - Near-distance detection device for fluorite mine goaf

Abstract

The invention discloses a near-distance detection device for a fluorite goaf, which belongs to the technical field of detection equipment and comprises a magnetic field measuring instrument and a data processing system, wherein the magnetic field measuring instrument and the data processing system are used for determining the distribution condition of measuring lines of a measuring area according to acquisition parameters, transmitting transient electromagnetic waves to each measuring line of the measuring area, detecting the transient feedback electromagnetic waves fed back by each measuring line, carrying out inversion analysis on the feedback electromagnetic waves of each measuring line, obtaining inversion resistivity and depth data of each measuring line according to inversion analysis results, determining a low-resistance abnormal area and a goaf abnormal area in the goaf according to the inversion resistivity and the depth data of each measuring line, and determining the boundary position of the goaf according to the low-resistance abnormal area and the goaf and combining geological and geophysical information, so that the near-distance detection precision and efficiency of the fluorite goaf are improved.

Inventors

• HAO MINGSHENG
• Peng Tongqiang
• XUN HUI
• SUN LIN
• JIA TAO
• LIU LINGQUAN

Assignees

• 山东省地矿工程勘察院(山东省地质矿产勘查开发局八〇一水文地质工程地质大队)
• 山东省水工环地质工程有限公司

Dates

Publication Date

20260508

Application Date

20260206

Claims (7)

1. 1. A near-distance detection device for a fluorite mine goaf is characterized by comprising a magnetic field measuring instrument and a data processing system, wherein the magnetic field measuring instrument is arranged at detection points and used for collecting data information, the data processing system establishes different geophysical numerical models according to geology and geophysical information of a detection zone, forward modeling is conducted on the geophysical numerical models to obtain transient electromagnetic response characteristics under different parameters, detection parameters of the detection zone are determined according to simulation results, detection tests are conducted on typical detection points in the detection zone, selected detection parameters are verified, acquisition parameters are determined according to verification results, distribution conditions of measurement lines of the detection zone are determined according to the acquisition parameters, transient electromagnetic waves are emitted to each measurement line of the detection zone, and transient feedback electromagnetic waves fed back by each measurement line are detected.
2. 2. The fluorite mine goaf near-distance detection device of claim 1, wherein inversion analysis is performed on the feedback electromagnetic waves of each measuring line, and inversion resistivity and depth data of each measuring line are obtained according to inversion analysis results.
3. 3. The fluorite mine goaf short-distance detection device according to claim 2, wherein a low-resistance abnormal region and a goaf abnormal region in the goaf are determined according to inversion resistivity and depth data of each measuring line, and boundary positions of the goaf are determined according to the low-resistance abnormal region and the goaf abnormal region by combining geological and geophysical information.
4. 4. The apparatus of claim 1, wherein the detector comprises a magnetic field measuring instrument, the magnetic field measuring instrument comprises a measuring instrument body and a base for supporting the multistage magnet, the first turntable and the second turntable are oppositely arranged on the base and are respectively and rotatably connected with the base, and the axis of the first turntable is coincident with the axis of the second turntable.
5. 5. The fluorite mine goaf short-distance detection device of claim 4 wherein the first positioning fixture is connected to a side of the first turntable facing the second turntable, and the second positioning fixture is connected to a side of the second turntable facing the first turntable.
6. 6. The fluorite mine goaf short-distance detection device of claim 5, wherein the first positioning tool is provided with a plurality of first limiting points, the second positioning tool is provided with a plurality of second limiting points corresponding to the first limiting points one by one, and the wire passes through the corresponding first limiting points and second limiting points and penetrates through the multistage magnet.
7. 7. The fluorite mine goaf short-distance detection device of claim 6 wherein the wire between the first limit point and the second limit point is parallel to the axis of the first turntable and the distance between the wire and the axis of the first turntable is less than the inner circumference radius of the multistage magnet.

Description

Near-distance detection device for fluorite mine goaf Technical Field The invention belongs to the technical field of detection equipment, and particularly relates to a fluorite mine goaf short-distance detection device. Background The goaf is a cavity generated by mining mineral resources under the ground, and due to the fact that a large number of mining residues are left in stopes, chambers, roadways and the like which are not processed in time, the goaf has the characteristics of being strong in invisibility, poor in regularity of spatial distribution characteristics, difficult to predict in caving and collapsing situations of top plates of the goaf, and the like, and has great harm to safety of new projects to be passed through or past the goaf. For this reason, major line projects such as railways, highways and the like often adopt a bypass scheme through mining areas, and for mining areas with poor bypass conditions and high cost, reinforcement treatment is required after the distribution characteristics of goafs in the two side ranges of the line are checked, so that the space rule and the distribution range of the goafs in the line influence range are accurately obtained, and the bypass or reinforcement precondition is adopted. The existing goaf detection method mainly comprises three steps, the goaf detection method is characterized in that the goaf is detected through large geological detection equipment, but the goaf position cannot be predicted, and the large equipment is large in weight, so that geological collapse is easily caused once the large equipment is arranged in the goaf range, and the risk that workers and equipment fall into the goaf exists. The second is to build an earth pressure monitoring network, so as to effectively monitor the earth pressure for a long time, and under the normal condition, the earth pressure monitoring network is built for a long period, and the earth pressure monitoring network cannot accurately monitor a smaller goaf due to the size of the goaf, so that the accuracy is low. The third is a geophysical method, which indirectly measures goaf by measuring the formation resistivity (high density electrical method) or dielectric constant (surface radar) distribution. The resistivity method is a volume effect, has the problem of low spatial resolution, and has a shallow detection depth, so that the accuracy of a detection result is low. Disclosure of Invention The invention provides a fluorite mine goaf short-distance detection device which comprises a magnetic field measuring instrument and a data processing system, wherein the magnetic field measuring instrument is arranged at detection points and used for collecting data information, the data processing system establishes different geophysical numerical models according to geological and geophysical information of a detection zone, forward modeling is conducted on the geophysical numerical models to obtain transient electromagnetic response characteristics under different parameters, detection parameters of the detection zone are determined according to simulation results, detection tests are conducted on typical detection points in the detection zone, selected detection parameters are verified, acquisition parameters are determined according to verification results, the distribution condition of measurement lines of the detection zone is determined according to the acquisition parameters, transient electromagnetic waves are emitted to each measurement line of the detection zone, and transient feedback electromagnetic waves fed back by each measurement line are detected. Further, inversion analysis is carried out on the feedback electromagnetic waves of each measuring line, and inversion resistivity and depth data of each measuring line are obtained according to inversion analysis results. Further, according to inversion resistivity and depth data of each measuring line, a low-resistance abnormal region and a mining space abnormal region in the goaf are determined, and according to the low-resistance abnormal region and the mining space abnormal region, the boundary position of the goaf is determined by combining geological and geophysical information. Further, the detector adopts a magnetic field measuring instrument, the magnetic field measuring instrument comprises a measuring instrument body and a base for supporting the multistage magnet, the first rotary table and the second rotary table are oppositely arranged on the base and are respectively and rotatably connected with the base, and the axis of the first rotary table is coincident with the axis of the second rotary table. Further, the first location frock is connected in the one side of first carousel towards the second carousel, and the second location frock is connected in the one side of second carousel towards first carousel. Further, the first positioning tool is provided with a plurality of first limiting points, the second positioning tool is pr