CN111980756B - Abnormity monitoring method and abnormity monitoring system for mine roof - Google Patents
Abnormity monitoring method and abnormity monitoring system for mine roof Download PDFInfo
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Abstract
The application discloses an abnormity monitoring system and an abnormity monitoring method of a mine roof, the system realizes monitoring of water containing abnormity of the mine roof based on a transient electromagnetic method, specifically, a transmitting module is arranged in a roadway under a mine, a receiving module is arranged on the ground above the mine, and in the monitoring process, a transmitter provides transmitting current for a transmitting coil so that the transmitting coil forms an excitation magnetic field, and the excitation magnetic field excites a medium under the mine to generate a pure secondary field. The receiving coil forms induced current representing mine roof information by inducing a pure secondary field, the receiver calculates the apparent resistivity value of the medium according to the induced current, and obtains an apparent resistivity image of the medium according to the apparent resistivity value, so that the acquisition and monitoring of the apparent resistivity image of the mine roof are realized, managers can analyze the water-bearing abnormity of the mine roof according to the obtained apparent resistivity image, and the problem that the detection and monitoring of the mine roof water-bearing layer and the separation layer water cannot be carried out in the working face stoping process is solved.
Description
Technical Field
The application relates to the technical field of mineral exploration, in particular to an abnormity monitoring method and an abnormity monitoring system for a mine roof.
Background
Many coal fields in China have very complicated hydrogeological conditions, most coal fields are threatened by various water bodies in the production process, and the safety production of mines is seriously influenced. At present, aiming at detecting water damage of a working face roof, water-rich water of a water-rich aquifer of the working face roof is mostly detected by using methods and technologies such as a mine transient electromagnetic method and an audio frequency electric perspective method before stoping of the working face, and water is drained from construction drill holes in a water-rich abnormal area according to detection results.
However, the geophysical prospecting method can only detect the water-rich state of the roof aquifer before the stope of the working face is obtained, and in the stope of the working face, the water-rich state of the aquifer is changed under the influence of mining, and part of mines can form separation water to further threaten the safety stope of the working face. The hydrogeological conditions of the working face roof can change along with the working face stoping, and after the working face stoping, the roof of the goaf strides and falls, personnel can not enter the goaf again to detect, and can not detect and monitor the water-bearing layer and the bed separation water of the roof of the rear goaf in real time in the stoping process of the working face, so that the water disaster prevention and control requirements of the current mine can not be completely met.
Disclosure of Invention
In order to solve the technical problem, the application provides an abnormity monitoring system and an abnormity monitoring method for a mine roof, so as to solve the problem that aquifer and separation water of the mine roof cannot be detected and monitored in the working face stoping process.
In order to achieve the technical purpose, the embodiment of the application provides the following technical scheme:
an anomaly monitoring system for a mine roof for detecting water-bearing anomalies in the mine roof, the anomaly monitoring system for the mine roof comprising: the device comprises a receiving module and a transmitting module; wherein,
the transmitting module is arranged in a roadway under a mine, and the receiving module is arranged on the ground above the mine;
the transmitting module includes: the device comprises a transmitter and a transmitting coil, wherein the transmitting coil is arranged around a working face roadway and used for providing transmitting current for the transmitting coil so that the transmitting coil forms an excitation magnetic field, and the excitation magnetic field excites a medium under a mine to generate a pure secondary field;
the receiving module includes: the receiving coil is used for inducing the pure secondary field and generating induced current, and the receiver is used for calculating the apparent resistivity value of the medium under the mine according to the induced current and obtaining an apparent resistivity image of the medium under the mine according to the apparent resistivity value.
Optionally, the transmitter and the receiver have a transient electromagnetic system with a crystal oscillator synchronization function.
Optionally, the process of calculating the apparent resistivity value of the medium under the mine by the receiver according to the induced current specifically includes:
and denoising the induced current, and calculating the apparent resistivity value of the medium under the mine by using the denoised induced current according to a late field formula.
Optionally, the process of obtaining the apparent resistivity image of the medium under the mine by the receiver according to the apparent resistivity value specifically includes:
filtering and smoothing the apparent resistivity value obtained by calculation;
and obtaining an apparent resistivity image of the medium under the mine according to the filtered and smoothed apparent resistivity value.
Optionally, the system further comprises a data processing module, configured to determine whether the mine roof has a water-containing anomaly according to the apparent resistivity image of the medium under the mine.
Optionally, the process of determining whether the mine roof has the water-containing abnormality according to the apparent resistivity image of the medium under the mine by the data processing module specifically includes:
when the apparent resistivity of at least one region of the apparent resistivity image of the medium under the mine is smaller than a first preset threshold value, judging that the region with the apparent resistivity smaller than the first preset threshold value has water-containing abnormity;
or
When the apparent resistivity image of the medium under the mine has at least one area with the apparent resistivity which is changed by more than a preset proportion compared with the apparent resistivity of the area measured in the previous period, judging that the water-containing abnormity exists in the area with the apparent resistivity which is changed by more than the preset proportion compared with the apparent resistivity of the area measured in the previous period.
Optionally, the transmitting module further includes: a coil protection device and an explosion-proof housing; wherein,
the coil protection device is used for protecting the transmitting coil, and the explosion-proof shell is used for protecting the transmitter.
An abnormality monitoring method for a mine roof is realized based on any one of the above abnormality monitoring systems for the mine roof, and comprises the following steps:
arranging a transmitting module in a roadway under a mine and arranging a receiving module on the ground above the mine;
providing a transmitting current to a transmitting coil by using a transmitter of a transmitting module so that the transmitting coil forms an excitation magnetic field, and exciting a medium under a mine by using the excitation magnetic field to generate a pure secondary field;
inducing the pure secondary field by using a receiving coil of the receiving module to generate an induced current;
and calculating the apparent resistivity value of the medium under the mine according to the induced current by using a receiver of the receiving module, and obtaining an apparent resistivity image of the medium under the mine according to the apparent resistivity value.
Optionally, the method further includes:
and judging whether the mine roof has water-containing abnormity or not according to the apparent resistivity image of the medium under the mine.
Optionally, the determining whether the mine roof has water-containing abnormality according to the apparent resistivity image of the medium under the mine includes:
when the apparent resistivity of at least one region of the apparent resistivity image of the medium under the mine is smaller than a first preset threshold value, judging that the region with the apparent resistivity smaller than the first preset threshold value has water-containing abnormity;
or
When the apparent resistivity image of the medium under the mine has at least one area with the apparent resistivity which is changed by more than a preset proportion compared with the apparent resistivity of the area measured in the previous period, judging that the water-containing abnormity exists in the area with the apparent resistivity which is changed by more than the preset proportion compared with the apparent resistivity of the area measured in the previous period.
It can be seen from the above technical solutions that the embodiment of the present application provides an anomaly monitoring system and an anomaly monitoring method for a mine roof, wherein the anomaly monitoring system for the mine roof monitors water-containing anomalies of the mine roof based on a transient electromagnetic method, specifically, a transmitting module is disposed in a roadway under a mine, a receiving module is disposed on the ground above the mine, in a monitoring process, a transmitter of the transmitting module provides a transmitting current to a transmitting coil, so that the transmitting coil forms an excitation magnetic field, and the excitation magnetic field excites a medium under the mine to generate a pure secondary field. The receiving coil of the receiving module forms induced current representing mine roof information by inducing the pure secondary field, the receiver calculates the apparent resistivity value of the medium under the mine according to the induced current, and obtains an apparent resistivity image of the medium under the mine according to the apparent resistivity value so as to realize acquisition and monitoring of the apparent resistivity image of the mine roof, so that a manager can analyze the water-containing abnormity of the mine roof according to the obtained apparent resistivity image, and the problem that the water-containing layer and the separation layer water of the mine roof cannot be detected and monitored in the stoping process of a working face is solved.
Drawings
In order to more clearly illustrate the embodiments of the present application or the technical solutions in the prior art, the drawings needed to be used in the description of the embodiments or the prior art will be briefly introduced below, it is obvious that the drawings in the following description are only embodiments of the present application, and for those skilled in the art, other drawings can be obtained according to the provided drawings without creative efforts.
Fig. 1 is a schematic structural diagram of an anomaly monitoring system for a mine roof according to an embodiment of the present application;
fig. 2 is a schematic flow chart of a method for monitoring abnormality of a mine roof according to an embodiment of the present application;
fig. 3 is a schematic flow chart of an abnormality monitoring method for a mine roof according to another embodiment of the present application.
Detailed Description
The technical solutions in the embodiments of the present application will be clearly and completely described below with reference to the drawings in the embodiments of the present application, and it is obvious that the described embodiments are only a part of the embodiments of the present application, and not all of the embodiments. All other embodiments, which can be derived by a person skilled in the art from the embodiments given herein without making any creative effort, shall fall within the protection scope of the present application.
An embodiment of the present application provides an anomaly monitoring system for a mine roof, as shown in fig. 1, for detecting an aqueous anomaly of the mine roof, the anomaly monitoring system for the mine roof includes: a receiving module 10 and a transmitting module 20; wherein,
the transmitting module 20 is arranged in a roadway under a mine, and the receiving module 10 is arranged on the ground above the mine;
the transmission module 20 includes: the system comprises a transmitter 21 and a transmitting coil 22, wherein the transmitting coil 22 is arranged around a working face roadway, and the transmitter 21 is used for providing transmitting current for the transmitting coil 22 so that the transmitting coil 22 forms an excitation magnetic field which excites a medium under a mine to generate a pure secondary field;
the receiving module 10 includes: the mine medium monitoring system comprises a receiving coil 12 and a receiver 11, wherein the receiving coil 12 is used for inducing the pure secondary field and generating induced current, and the receiver 11 is used for calculating the apparent resistivity value of the medium under the mine according to the induced current and obtaining an image of the apparent resistivity of the medium under the mine according to the apparent resistivity value.
In practical applications, the transmitting module 20 and the receiving module 10 may further be respectively equipped with a power supply module for supplying power, and the specific power supply manner of the transmitting module 20 and the receiving module 10 is not limited in this application, which is determined according to practical situations.
In this embodiment, the receiver 11 and the transmitter 21 are separated and respectively disposed on the ground of the mine and in the roadway under the mine, and the apparent resistivity image of the medium under the mine is obtained based on the principle of the transient electromagnetic method, and when the apparent resistivity value of the medium under the mine is measured by the transient electromagnetic method, the receiver 11 needs to collect the pure secondary field generated by the underground medium at the moment when the transmitter 21 is turned off the transmission current, so that it is necessary to ensure that the transmitter 21 and the receiver 11 must strictly work at the same frequency and phase. In one embodiment of the present application, the transmitter 21 and the receiver 11 have a transient electromagnetic system with crystal oscillator synchronization function, and before actual operation, synchronous calibration of the transmitter 21 and the receiver 11 is performed to ensure that the transmitter 21 and the receiver 11 are synchronized to operate strictly in the same frequency and phase.
For the design of parameters such as the size of the transmitter coil 22 and the receiver coil 12, the design can be specifically designed according to mine hydrogeological data, working face profile and detection task requirements.
The transmitter 21 positively correlates the magnitude of the transmitting current provided by the transmitting coil 22 with the magnetic field strength of the exciting magnetic field formed by the transmitting coil 22, and generally, the magnitude of the transmitting current needs to be ensured to be sensed by the receiving coil 12, and the transmitting current is appropriately increased, which is also beneficial to improving the signal-to-noise ratio of the sensing current sensed by the receiving coil 12.
The mine roof abnormity monitoring system is used for monitoring water containing abnormity of a mine roof based on a transient electromagnetic method, specifically, a transmitting module 20 is arranged in a roadway under the mine, a receiving module 10 is arranged on the ground above the mine, and in the monitoring process, a transmitter 21 of the transmitting module 20 provides transmitting current for a transmitting coil 22 so that the transmitting coil 22 forms an excitation magnetic field which excites a medium under the mine to generate a pure secondary field. The receiving coil 12 of the receiving module 10 forms induced current representing mine roof information by inducing the pure secondary field, the receiver 11 calculates the apparent resistivity value of the medium under the mine according to the induced current, and obtains an apparent resistivity image of the medium under the mine according to the apparent resistivity value, so as to realize acquisition and monitoring of the apparent resistivity image of the mine roof, so that a manager can analyze water containing abnormity of the mine roof according to the obtained apparent resistivity image, and the problem that detection and monitoring of a mine roof aquifer and separation water cannot be carried out in a working face stoping process is solved.
On the basis of the above embodiment, in an embodiment of the present application, the process of calculating the apparent resistivity value of the medium under the mine by the receiver 11 according to the induced current specifically includes:
and denoising the induced current, and calculating the apparent resistivity value of the medium under the mine by using the denoised induced current according to a late field formula.
The process of obtaining the apparent resistivity image of the medium under the mine by the receiver 11 according to the apparent resistivity value specifically includes:
filtering and smoothing the apparent resistivity value obtained by calculation;
and obtaining an apparent resistivity image of the medium under the mine according to the filtered and smoothed apparent resistivity value.
In this embodiment, the purpose of the receiver 11 to denoise the induced current is to improve the signal-to-noise ratio of the induced current, and the purpose of filtering and smoothing the calculated apparent resistivity value is to improve the definition of the finally obtained apparent resistivity image.
In another embodiment of the present application, still referring to fig. 1, based on the above embodiment, the abnormality monitoring system for a mine roof further includes: and the data processing module 30 is used for judging whether the mine roof has water containing abnormity according to the apparent resistivity image of the medium under the mine.
In this embodiment, the data processing module 30 may also automatically determine the water containing abnormality, so as to further reduce the working intensity of the manager.
Specifically, the process of determining whether the mine roof has the water-containing abnormality according to the apparent resistivity image of the medium under the mine by the data processing module 30 specifically includes:
when the apparent resistivity of at least one region of the apparent resistivity image of the medium under the mine is smaller than a first preset threshold value, judging that the region with the apparent resistivity smaller than the first preset threshold value has water-containing abnormity;
or
When the apparent resistivity image of the medium under the mine has at least one area with the apparent resistivity which is changed by more than a preset proportion compared with the apparent resistivity of the area measured in the previous period, judging that the water-containing abnormity exists in the area with the apparent resistivity which is changed by more than the preset proportion compared with the apparent resistivity of the area measured in the previous period.
Wherein, the specific value of the preset proportion can be 20%, 19%, 21% and the like. The change of the apparent resistivity of a certain area of the apparent resistivity image of the medium under the mine compared with the apparent resistivity of the area measured in the previous period refers to the ratio of the difference of the apparent resistivity of the area measured in the current period minus the apparent resistivity of the area measured in the previous period to the apparent resistivity of the area measured in the previous period.
The first predetermined value may be
I.e., a region where the apparent resistivity is below this value, may be defined as a relatively low resistance anomaly region, wherein,
is the arithmetic mean value, delta, of the apparent resistivity parameter for each region in the apparent resistivity imagenIs the standard deviation value of the apparent resistivity parameter of each area in the apparent resistivity image.
In practical applications, the transmitting module 20 may further include: a coil protection device and an explosion-proof housing; wherein,
the coil protection device is used for protecting the transmitting coil 22, and the explosion-proof housing is used for protecting the transmitter 21.
In addition, when the transmitting coil 22 and the transmitter 21 are arranged, the environment and the inherent structure under the mine can be used for protecting the transmitting coil 22 and the transmitter 21, for example, when the transmitting coil 22 is arranged, the transmitting coil 22 is arranged around the working face by using roadways such as two crossheading channels, cutting holes and connecting roadways on the working face, the transmitting coil 22 can be fully embedded at the outer side bottom plate of each crossheading channel by using each crossheading drainage channel or each excavated groove, and the coil is protected by using a hard plastic tube so as to prevent the transmitting coil 22 from being damaged and broken to influence the subsequent work. The coil can be arranged at the position where the interference or damage of the baseplate of the external side of each crossheading is minimum, the coil is protected by using a hard plastic tube, and measures are taken to reinforce and protect the coil if necessary.
The mine roof anomaly monitoring system provided by the embodiment of the application is described below by taking monitoring of aquifers and separation water of a working face roof of a certain mine area 1601 in Guizhou as an example.
Still referring to fig. 1, the transmitter module 20 is disposed at a mine working surface and the receiver module 10 is disposed at an upper surface of a mine. Because the transmitter 21 and the receiver 11 are separated, and the transmitter 21 is under the mine, the synchronization with the receiver 11 cannot be realized by adopting a line synchronization or GPS synchronization mode, the receiver 11 and the transmitter 21 adopt a transient electromagnetic system with a crystal oscillator synchronization function.
Firstly, in the arrangement process of the transmitting module 20 and the receiving module 10, according to mine hydrogeological data, working face overview and detection task requirements, a roadway-ground transient electromagnetic observation scheme is designed, and the method specifically comprises the following steps: a transmission system, a line layout, an observation plan, etc.
According to the relevant geological and hydrogeological data of the working face, the transmitting coil 22 is determined to be 350m multiplied by 170m, and the transmitting coil 22 is arranged along 1601 working face transportation crossroads, eye cutting, return air crossroads and connecting roadways. Measuring lines are arranged in the range of the working face corresponding to the ground, the direction of the measuring lines is parallel to that of the working face, the detection range extends by 60m towards the periphery respectively, namely the final detection range is a rectangle with 470m multiplied by 290m, the distance between the measuring lines is 20m, the distance between the measuring points is 10m, 16 measuring lines are arranged in total, each measuring line has 48 measuring points, and the total number of the measuring points is 768.
According to the geological and hydrogeological conditions of the working face and the task requirements of detecting the water-bearing layer and the water-rich condition of the roof, an observation plan is designed as follows:
1. before the working face is formally stoped, detecting one line by one measuring line and one measuring point;
2. during working face recovery, the positions 70m, 140m, 210m, 280m and 350m away from the cutting holes are predicted to generate overburden rock periodic breaking, so that after the working face recovery is designed to 50m, detection is carried out once every 10m of recovery, and the range of 100m is totally included from 60m behind to 40m ahead of the overburden rock breaking position detected every time. If the mining speed of the working face is low, the detection times are increased, and the interval between two detections is not more than 3 days.
Then, according to the designed observation scheme, the transmitting coil 22 is arranged on the underground working face, the transmitting coil 22 is arranged around the working face by utilizing roadways such as two crossheading channels, cutting holes and connecting roadways of the working face, the transmitting coil 22 can be fully embedded at the outer side bottom plate of each crossheading channel by utilizing each crossheading drainage channel or each excavated groove, and the coil is protected by using a hard plastic pipe so as to prevent the coil from being damaged and broken to influence the subsequent work.
When the transmitting coil 22 is arranged, the actual conditions on site and the influence of later extraction are fully considered, the transmitting coil 22 is arranged at the position where the disturbance or damage is minimum such as the outer side bottom plate of each gateway, the transmitting coil 22 is protected by using a hard plastic tube, and measures are taken to reinforce and protect the transmitting coil 22 if necessary.
According to the design, along 1601 working face transportation crossheading, cut eye, return air crossheading, contact lane arrange transmitting coil 22, transmitting coil 22 arranges in the outer group bottom plate basin in the tunnel, uses the stereoplasm plastic tubing to protect to consolidate at tunnel intersection position, avoid the coil to receive the destruction.
After the transmitting coil 22 and the receiving coil 12 are arranged, synchronous calibration between the transmitter 21 and the receiver 11 is performed, and then the transmitter 21 and a matched power supply module and the like are arranged on the underground working surface of the coal mine and the transmitting coil 22 is connected. At the surface, data acquisition is performed according to a designed observation scheme using the receiver 11 and the receiving coil 12.
And finally, the data processing module 30 processes and analyzes the data acquired by the receiver 11, performs resistivity imaging, inversion and other processing, judges the water-rich property of the top plate aquifer or the separation layer of the working face, or compares periodically acquired data, and analyzes the change condition of the water-rich property of the top plate aquifer or the separation layer. When the resistivity value of a certain area is smaller than a set threshold value, the area is judged to be a water-rich abnormal area, or the difference between two detection results is larger than the set threshold value, the water-rich property of the area is judged to be changed greatly, the risk of water damage exists, and the position of a risk area and a water damage prevention suggestion are provided for a mine, so that the detection and monitoring of a stope roof aquifer and a separation layer are realized.
Compared with the common transient electromagnetic method or other mine water damage detection and monitoring technologies, the abnormity monitoring system for the mine roof has the following advantages:
1) the abnormity monitoring system of mine roof provided by the embodiment of the application utilizes the transient electromagnetic detection principle, before stoping after the working face is formed, the transmitting system is arranged around the whole working face, and the working face stoping process receives on the ground, so that the purposes of detecting and monitoring the water-bearing layer and the separation layer water of the roof in the stoping process of the whole working face are realized.
2) The transmitter 21 is arranged under a mine, and is not required to be frequently moved and is not sensitive to weight, so that the transmitter 21 can adopt an explosion-proof design, and can realize large transmitting current, thereby meeting the requirement of using a large mine with a deeper working face. The receiver 11 is arranged on the ground, so that the construction is convenient, and the data acquisition cost is greatly reduced.
3) The existing coal mine water damage monitoring technology mainly utilizes various sensors to monitor water temperature, water pressure and water quality change of an aquifer or underground environment change to send out early warning, the principle of the method is that other aquifer water enters the monitored aquifer and then changes the water temperature, the water pressure and the water quality when water burst is utilized, water burst symptoms are often generated when the method sends out early warning, and early warning time is short. The method that the unusual monitoring system of mine roof provided by the embodiment of this application adopted can carry out real-time supervision to aquifer rich water nature or separation layer water filling condition, can send the early warning and provide concrete suggestion for the water work of ore side exploration and discharge when finding that its rich water condition takes place obvious change to avoid taking place the water inrush accident.
The method for monitoring abnormality of a mine roof provided in the embodiments of the present application is described below, and the method for monitoring abnormality of a mine roof described below may be referred to in correspondence with the system for monitoring abnormality of a mine roof described above.
Correspondingly, an embodiment of the present application provides a method for monitoring abnormality of a mine roof, which is implemented based on the system for monitoring abnormality of a mine roof described in any one of the above embodiments, as shown in fig. 2, the method for monitoring abnormality of a mine roof includes:
s101: arranging a transmitting module in a roadway under a mine and arranging a receiving module on the ground above the mine;
s102: providing a transmitting current to a transmitting coil by using a transmitter of a transmitting module so that the transmitting coil forms an excitation magnetic field, and exciting a medium under a mine by using the excitation magnetic field to generate a pure secondary field;
s103: inducing the pure secondary field by using a receiving coil of the receiving module to generate an induced current;
s104: and calculating the apparent resistivity value of the medium under the mine according to the induced current by using a receiver of the receiving module, and obtaining an apparent resistivity image of the medium under the mine according to the apparent resistivity value.
Optionally, referring to fig. 3, the method for monitoring abnormality of the mine roof further includes:
s105: and judging whether the mine roof has water-containing abnormity or not according to the apparent resistivity image of the medium under the mine.
Specifically, the judging whether the mine roof has water-containing abnormality according to the apparent resistivity image of the medium under the mine comprises:
when the apparent resistivity of at least one region of the apparent resistivity image of the medium under the mine is smaller than a first preset threshold value, judging that the region with the apparent resistivity smaller than the first preset threshold value has water-containing abnormity;
or
When the apparent resistivity image of the medium under the mine has at least one area with the apparent resistivity which is changed by more than a preset proportion compared with the apparent resistivity of the area measured in the previous period, judging that the water-containing abnormity exists in the area with the apparent resistivity which is changed by more than the preset proportion compared with the apparent resistivity of the area measured in the previous period.
To sum up, the embodiment of the application provides an anomaly monitoring system and an anomaly monitoring method for a mine roof, wherein the anomaly monitoring system for the mine roof monitors water-containing anomalies of the mine roof based on a transient electromagnetic method, specifically, a transmitting module is arranged in a roadway under a mine, a receiving module is arranged on the ground above the mine, in the monitoring process, a transmitter of the transmitting module provides transmitting current for a transmitting coil so that the transmitting coil forms an excitation magnetic field, and the excitation magnetic field excites a medium under the mine to generate a pure secondary field. The receiving coil of the receiving module forms induced current representing mine roof information by inducing the pure secondary field, the receiver calculates the apparent resistivity value of the medium under the mine according to the induced current, and obtains an apparent resistivity image of the medium under the mine according to the apparent resistivity value so as to realize acquisition and monitoring of the apparent resistivity image of the mine roof, so that a manager can analyze the water-containing abnormity of the mine roof according to the obtained apparent resistivity image, and the problem that the water-containing layer and the separation layer water of the mine roof cannot be detected and monitored in the stoping process of a working face is solved.
Features described in the embodiments in the present specification may be replaced with or combined with each other, each embodiment is described with a focus on differences from other embodiments, and the same and similar portions among the embodiments may be referred to each other.
The previous description of the disclosed embodiments is provided to enable any person skilled in the art to make or use the present application. Various modifications to these embodiments will be readily apparent to those skilled in the art, and the generic principles defined herein may be applied to other embodiments without departing from the spirit or scope of the application. Thus, the present application is not intended to be limited to the embodiments shown herein but is to be accorded the widest scope consistent with the principles and novel features disclosed herein.
Claims (6)
1. An anomaly monitoring system for a mine roof for detecting water-bearing anomalies in the mine roof, the anomaly monitoring system for the mine roof comprising: the device comprises a receiving module and a transmitting module; wherein,
the transmitting module is arranged in a roadway under a mine, and the receiving module is arranged on the ground above the mine;
the transmitting module includes: the device comprises a transmitter and a transmitting coil, wherein the transmitting coil is arranged around a working face roadway and used for providing transmitting current for the transmitting coil so that the transmitting coil forms an excitation magnetic field, and the excitation magnetic field excites a medium under a mine to generate a pure secondary field;
the receiving module includes: the receiving coil is used for inducing the pure secondary field and generating induced current, and the receiver is used for calculating the apparent resistivity value of the medium under the mine according to the induced current and obtaining an apparent resistivity image of the medium under the mine according to the apparent resistivity value;
the system also includes a data processing module;
the data processing module is used for judging whether the mine roof has water containing abnormity according to the apparent resistivity image of the medium under the mine;
the data processing module judges whether the mine roof has a process of abnormal water content according to the apparent resistivity image of the medium under the mine, and the process specifically comprises the following steps:
when the apparent resistivity of at least one region of the apparent resistivity image of the medium under the mine is smaller than a first preset threshold value, judging that the region with the apparent resistivity smaller than the first preset threshold value has water-containing abnormity;
or
When the apparent resistivity image of the medium under the mine has at least one area with the apparent resistivity which is changed by more than a preset proportion compared with the apparent resistivity of the area measured in the previous period, judging that the water-containing abnormity exists in the area with the apparent resistivity which is changed by more than the preset proportion compared with the apparent resistivity of the area measured in the previous period.
2. The mine roof anomaly monitoring system of claim 1, wherein said transmitter and said receiver have a transient electromagnetic system with crystal synchronization.
3. The system for monitoring abnormalities of a mine roof as set forth in claim 1, wherein said receiver, based on said induced currents, calculates apparent resistivity values of the medium under the mine, including:
and denoising the induced current, and calculating the apparent resistivity value of the medium under the mine by using the denoised induced current according to a late field formula.
4. The system for monitoring abnormalities of a mine roof as set forth in claim 1, wherein said process of said receiver obtaining an apparent resistivity image of the medium under the mine from said apparent resistivity value specifically comprises:
filtering and smoothing the apparent resistivity value obtained by calculation;
and obtaining an apparent resistivity image of the medium under the mine according to the filtered and smoothed apparent resistivity value.
5. The system for anomaly monitoring of a mine roof as in claim 1, wherein said transmitter module further comprises: a coil protection device and an explosion-proof housing; wherein,
the coil protection device is used for protecting the transmitting coil, and the explosion-proof shell is used for protecting the transmitter.
6. A method for monitoring abnormality of a mine roof, which is implemented based on the system for monitoring abnormality of a mine roof according to any one of claims 1 to 5, the method for monitoring abnormality of a mine roof comprising:
arranging a transmitting module in a roadway under a mine and arranging a receiving module on the ground above the mine;
providing a transmitting current to a transmitting coil by using a transmitter of a transmitting module so that the transmitting coil forms an excitation magnetic field, and exciting a medium under a mine by using the excitation magnetic field to generate a pure secondary field;
inducing the pure secondary field by using a receiving coil of the receiving module to generate an induced current;
calculating the apparent resistivity value of the medium under the mine according to the induced current by using a receiver of the receiving module, and obtaining an apparent resistivity image of the medium under the mine according to the apparent resistivity value;
the method further comprises the following steps:
judging whether the mine roof has water containing abnormity or not according to the apparent resistivity image of the medium under the mine;
wherein, according to the apparent resistivity image of the medium under the mine, judge whether there is water-containing anomaly in the mine roof, include:
when the apparent resistivity of at least one region of the apparent resistivity image of the medium under the mine is smaller than a first preset threshold value, judging that the region with the apparent resistivity smaller than the first preset threshold value has water-containing abnormity;
or
When the apparent resistivity image of the medium under the mine has at least one area with the apparent resistivity which is changed by more than a preset proportion compared with the apparent resistivity of the area measured in the previous period, judging that the water-containing abnormity exists in the area with the apparent resistivity which is changed by more than the preset proportion compared with the apparent resistivity of the area measured in the previous period.
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| CN202010902777.2A CN111980756B (en) | 2020-09-01 | 2020-09-01 | Abnormity monitoring method and abnormity monitoring system for mine roof |
| PCT/CN2020/116697 WO2022047846A1 (en) | 2020-09-01 | 2020-09-22 | Anomaly monitoring method and anomaly monitoring system for mine roof |
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| CN111929741A (en) * | 2020-09-10 | 2020-11-13 | 安徽理工大学 | 5G + CMFT-R time domain electromagnetic field exploration system and method |
| CN113655526B (en) * | 2021-08-31 | 2024-03-12 | 中煤科工集团重庆研究院有限公司 | Real-time imaging method and system based on dynamic transient electromagnetic |
| CN114814964B (en) * | 2022-05-17 | 2024-04-05 | 安徽理工大学 | Roadway front water-rich area discrimination method based on variable source distance direct current resistivity |
| CN115576022B (en) * | 2022-12-05 | 2023-07-18 | 中煤科工西安研究院(集团)有限公司 | Mine water damage hidden danger electrical method monitoring system and method |
| CN116816441A (en) * | 2023-06-02 | 2023-09-29 | 济南福深兴安科技有限公司 | Optical fiber roof safety on-line monitoring system |
Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN106054258A (en) * | 2016-05-27 | 2016-10-26 | 中国矿业大学 | Magnetic source ground-tunnel transient electromagnetic advanced detection method |
| CN106772644A (en) * | 2016-12-14 | 2017-05-31 | 中国矿业大学 | mine transient electromagnetic three-component detection method |
| CN107765319A (en) * | 2017-10-09 | 2018-03-06 | 中国矿业大学(北京) | A kind of Mine Transient Electromagnetic Method resistivity correction method |
| CN107807395A (en) * | 2017-10-27 | 2018-03-16 | 中国矿业大学 | Three-dimensional double magnetic source detection method above and below Mine transient electromagnetic well |
| CN109696710A (en) * | 2018-12-29 | 2019-04-30 | 煤炭科学技术研究院有限公司 | Mine transient electromagnetic automatic observation method based on more information feedback |
Family Cites Families (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CA2785717C (en) * | 2003-02-13 | 2016-07-12 | Bubioil Aps | Measuring equipment and method for mapping the geology in an underground formation |
| CN104597511B (en) * | 2014-12-29 | 2017-12-01 | 中国矿业大学 | A kind of multilayer goaf ground tunnel transient electromagnetic detecting method |
| CN107065023B (en) * | 2016-12-22 | 2020-04-24 | 煤炭科学技术研究院有限公司 | Detection system based on underground space three-dimensional transient electromagnetic data acquisition |
| CN107884834A (en) * | 2017-10-19 | 2018-04-06 | 中煤科工集团西安研究院有限公司 | Homologous more transient electromagnetic detecting methods |
| CN108828676A (en) * | 2018-04-18 | 2018-11-16 | 中国矿业大学 | A kind of ground-mine laneway transient electromagnetic three-component detection method |
-
2020
- 2020-09-01 CN CN202010902777.2A patent/CN111980756B/en active Active
- 2020-09-22 WO PCT/CN2020/116697 patent/WO2022047846A1/en active Application Filing
Patent Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN106054258A (en) * | 2016-05-27 | 2016-10-26 | 中国矿业大学 | Magnetic source ground-tunnel transient electromagnetic advanced detection method |
| CN106772644A (en) * | 2016-12-14 | 2017-05-31 | 中国矿业大学 | mine transient electromagnetic three-component detection method |
| CN107765319A (en) * | 2017-10-09 | 2018-03-06 | 中国矿业大学(北京) | A kind of Mine Transient Electromagnetic Method resistivity correction method |
| CN107807395A (en) * | 2017-10-27 | 2018-03-16 | 中国矿业大学 | Three-dimensional double magnetic source detection method above and below Mine transient electromagnetic well |
| CN109696710A (en) * | 2018-12-29 | 2019-04-30 | 煤炭科学技术研究院有限公司 | Mine transient electromagnetic automatic observation method based on more information feedback |
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