CN111929349A - Roadway surrounding rock dynamic water content in-situ test method and system - Google Patents
Roadway surrounding rock dynamic water content in-situ test method and system Download PDFInfo
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Abstract
The embodiment of the invention discloses an in-situ testing method and system for dynamic water content of surrounding rock of a roadway, which comprises the following steps: step 100, constructing a model for measuring environmental water volume change by using resistivity data of the inner wall of the surrounding rock of the roadway and electrode control information acquired by a high-density electrical method instrument; 200, detecting the water content of the inner wall of the roadway in real time through potential measurement electrode information aiming at an environmental water quantity change model so as to ensure that the lifting change accords with an expected value; 300, building a water quantity test platform connection number acquisition and data transmission module according to the demodulation signal, and monitoring the water quantity test platform connection number acquisition and data transmission module in real time through a Laview module; step 400, a control and information exchange processing center is constructed, a data interaction, sharing and sharing platform is built through a computer network, the whole system achieves an intermittent operation mode, the energy consumption of the system is greatly reduced, the change of the water content of the inner wall of the roadway can be effectively detected, the network and a monitoring platform are built through a wireless sensing module, the change rate of the water content can be recorded in real time, and the long-term stability of the system is enhanced.
Description
Technical Field
The embodiment of the invention relates to the technical field of roadway surrounding rock water level mark testing, in particular to an in-situ testing method and system for dynamic water content of roadway surrounding rock.
Background
The newly excavated coal mine roadway in China has the length of about 12000 km/year, more than 90 percent of the newly excavated coal mine roadway is the coal roadway, and the newly excavated coal mine roadway is huge in scale and is the first place in the world. When a water-containing rock stratum exists in a roadway roof, the roof rock stratum is influenced by tunneling and mining, primary joint cracks are developed and communicated, a channel is provided for the circulation of water in the roof rock stratum, the surrounding rocks of the roadway generally have water absorption and softening characteristics, particularly, the weakly consolidated surrounding rocks are easy to generate structural deterioration and strength attenuation under the water absorption condition, the method is a worldwide difficult problem for controlling the surrounding rocks of the roadway at present, if the dynamic water content of the surrounding rocks of the roadway can be accurately monitored, the damage condition of the surrounding rocks of the roadway can be predicted in time and the loosening range of the surrounding rocks of the roadway can be judged according to the change condition of the water content of different surrounding rocks in the tunneling and maintenance processes of the roadway, the supporting parameters and the reinforcing supporting scheme of the surrounding rocks of the roadway can be adjusted in real time, early prevention and early control can be performed on the roof collapse accident of the surrounding rocks of the roadway.
The existing method and system for in-situ testing of dynamic water content of surrounding rock of roadway also have the following defects:
(1) the existing method for testing the dynamic water content of the surrounding rock of the roadway adopts a non-contact detection mode to detect the water content of the surrounding rock, and although the method can effectively detect the water content and is convenient to install and easy to maintain, the method cannot judge the change rate of the dynamic water content in real time;
(2) a network node for tunnel country rock developments moisture content test system founds receives the interference of tunnel environment easily, leads to that monitoring real-time is weak, the security is lower, can't use in complicated tunnel environment, leads to real time monitoring moisture content data, can't provide the security suggestion when strutting the construction for the tunnel.
Disclosure of Invention
Therefore, the embodiment of the invention provides a roadway surrounding rock dynamic water content in-situ test method and a system, a dynamic double-threshold-based stripe counting detection algorithm is adopted to set a threshold aiming at the actual water level variation, a cyclic algorithm is constructed to judge the rising or falling of the water level, the intermittent operation mode of the whole system is realized, the energy consumption of the system is greatly reduced, the water level variation and the water content can be effectively detected, moreover, a network and a Laview monitoring platform are built through the wireless sensing module and the ZigBee module, so that the change rate of the water content can be recorded in real time, the long-term stability of the system is enhanced, the operation and real-time observation are easy, so as to solve the problems that in the prior art, the method and the system for in-situ testing the dynamic water content of the surrounding rock of the roadway cannot judge the change rate of the dynamic water content in real time and cannot be applied to complex roadway environments, the water content data cannot be monitored in real time, and safety suggestions cannot be provided for the roadway during supporting construction.
In order to achieve the above object, an embodiment of the present invention provides the following:
an in-situ testing method for dynamic water content of surrounding rock of a roadway comprises the following steps:
step 100, constructing a model for measuring environmental water volume change by using resistivity data of the inner wall of the surrounding rock of the roadway and electrode control information acquired by a high-density electrical method instrument;
200, detecting the water content of the inner wall of the tunnel in real time through potential measurement electrode information aiming at an environmental water volume change model, and demodulating a signal of the water content of the inner wall of the tunnel by adopting a dynamic double-threshold strip counting detection method to ensure that the lifting change accords with an expected value;
300, building a water quantity test platform connection number acquisition and data transmission module according to the demodulation signal, and monitoring the water quantity test platform connection number acquisition and data transmission module in real time through a Laview module;
and 400, constructing a control and information exchange processing center, and constructing a data interaction, sharing and sharing platform through a computer network.
100, the high-density electrical method instrument uses an aluminum alloy frame which is arranged on the surface of a rock body and is connected end to end around and sealed as a support body, and detects the potential difference at the designated electrode on the inner wall of the roadway through a measuring electrode.
And detecting the variation of the water content of the inner wall of the surrounding rock of the roadway through the resistivity spatial distribution characteristic by using the standard water content of the surrounding rock of the roadway as the basis according to the potential difference information, and constructing a feedback mechanism according to the variation of the water level.
The feedback mechanism is mainly used for establishing a regulation strategy of the height of the warning water level according to the actual water content variation according to the safe water level threshold.
And the adjusting strategy is used for adjusting the dynamic change of the water content according to the result of demodulating the measuring electrode signal for detecting the water content of the inner wall of the roadway in real time by a dynamic double-threshold stripe counting detection method.
The dynamic double-threshold fringe counting detection method comprises the following steps:
firstly, simulating a Schmitt circuit by software, respectively setting an upper threshold and a lower threshold for an input counting signal, and calculating a node by using a Laview module to convert a sine wave of the counting signal into a rectangular wave signal;
secondly, solving a peak-to-peak value according to the maximum and minimum values of the collected counting signals in a period through a cyclic algorithm, multiplying the peak-to-peak value by a threshold ratio, and continuously updating the threshold;
and finally, any one of the upper and lower orthogonal signals is used as a fringe counting signal, the other one is used as a direction judging signal during fringe counting, when the light intensity of the counting signal reaches an upper threshold or a lower threshold, a counter can be triggered to start counting, and the light intensity of the direction judging signal is obtained so as to judge the rising or falling of the water content.
The in-situ testing system for the dynamic water content of the surrounding rock of the roadway comprises a high-density electrical method instrument for collecting water content data, a Zigbee module for building a data transmission platform and a wireless sensor, wherein the high-density electrical method instrument utilizes an electrode measuring module (5) in the high-density electrical method instrument to detect potential measuring electrode information in real time, the output end of the electrode measuring module is connected with an embedded processor to amplify, filter and transmit the potential measuring electrode information to the Zigbee module, and the signal end of the Zigbee module is synchronized with the Laview module through the wireless sensor to establish a real-time monitoring view.
And the signal end of the embedded processor is connected with a transmitting signal amplifying circuit which amplifies the potential measuring electrode information and supplies the amplified potential measuring electrode information to the electrode measuring module for excitation and use.
And the signal end of the transmitting signal amplifying circuit is connected with the electrode measuring module circuit by using a shielding wire.
The output end of the transmitting signal amplifying circuit is connected with a filtering and wave detecting circuit used for filtering clutter interference, and the feedback end of the filtering and wave detecting circuit is connected with the electrode measuring module.
The embodiment of the invention has the following advantages:
the invention is essentially based on the dynamic double-threshold stripe counting detection algorithm roadway surrounding rock dynamic water content in-situ test method and system, sets the threshold value aiming at the actual water content variation, constructs the cyclic algorithm to judge the water content to rise or fall, realizes the intermittent operation mode of the whole system, greatly reduces the energy consumption of the system, can effectively detect the water content variation and the rock wall water content, has strong anti-interference and high measurement precision, is not influenced by complex water environment, builds the network and the Laview monitoring platform through the wireless sensing module and the ZigBee module, can record the water content variation rate in real time, not only ensures the integrity of information, but also can call out all historical records of the water content variation at any time, greatly improves the data processing efficiency, enhances the long-term stability of the system, and utilizes the Laview to construct the monitoring platform to enable a user to know the whole process of signal processing through the interface, each interface is designed to be simple, and operation and real-time observation are easy.
Drawings
In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the drawings used in the description of the embodiments or the prior art will be briefly described below. It should be apparent that the drawings in the following description are merely exemplary, and that other embodiments can be derived from the drawings provided by those of ordinary skill in the art without inventive effort.
The structures, ratios, sizes, and the like shown in the present specification are only used for matching with the contents disclosed in the specification, so as to be understood and read by those skilled in the art, and are not used to limit the conditions that the present invention can be implemented, so that the present invention has no technical significance, and any structural modifications, changes in the ratio relationship, or adjustments of the sizes, without affecting the effects and the achievable by the present invention, should still fall within the range that the technical contents disclosed in the present invention can cover.
FIG. 1 is a flow chart of an in-situ testing method for dynamic water content of roadway surrounding rock in an embodiment of the invention;
fig. 2 is a structural block diagram of an in-situ testing system for dynamic water content of roadway surrounding rock in the embodiment of the invention.
In the figure:
1-high density electrical method instrument; 2-a Zigbee module; 3-a wireless sensor; 4-Laview module; 5-an electrode measurement module; 6-embedded processor; 7-a transmit signal amplification circuit; 8-filter detection circuit.
Detailed Description
The present invention is described in terms of particular embodiments, other advantages and features of the invention will become apparent to those skilled in the art from the following disclosure, and it is to be understood that the described embodiments are merely exemplary of the invention and that it is not intended to limit the invention to the particular embodiments disclosed. 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 invention.
As shown in figure 1, the invention provides an in-situ testing method for dynamic water content of surrounding rocks of a roadway, wherein a wireless sensing module is used for collecting and processing water level data and transmitting the data through a wireless network, the collected water content data are transmitted to an adjacent route through a built ZigBee network and are forwarded, a threshold value is set for actual water content variation through a dynamic double-threshold stripe counting detection method, a cyclic algorithm is built to judge whether the water content rises or falls, an intermittent operation mode of the whole system is realized, the energy consumption of the system is greatly reduced, the water content variation and the water content can be effectively detected, the anti-interference is strong, the measurement precision is high, and the method is not influenced by a complex water environment.
The method comprises the following steps:
step 100, constructing a model for measuring environmental water volume change by using resistivity data of the inner wall of the surrounding rock of the roadway and electrode control information acquired by a high-density electrical method instrument;
200, detecting the water content of the inner wall of the tunnel in real time through potential measurement electrode information aiming at an environmental water volume change model, and demodulating a signal of the water content of the inner wall of the tunnel by adopting a dynamic double-threshold strip counting detection method so as to ensure that the lifting change accords with an expected value;
300, building a water quantity test platform connection number acquisition and data transmission module according to the demodulation signal, and monitoring the water quantity test platform connection number acquisition and data transmission module in real time through a Laview module;
and 400, constructing a control and information exchange processing center, and constructing a data interaction, sharing and sharing platform through a computer network. 100, the high-density electrical method instrument uses an aluminum alloy frame which is arranged on the surface of a rock body and is connected end to end around and sealed as a support body, and detects the potential difference at the designated electrode on the inner wall of the roadway through a measuring electrode.
In the embodiment, the high-density electrical method instrument installation method mainly comprises the steps that a sealed aluminum alloy frame is installed on a rock wall to serve as a supporting body, and in power supply measurement, in order to avoid interference of aluminum alloy frame conduction on a measurement signal, a layer of insulating paint is uniformly coated on the surface of the aluminum alloy frame to form an insulating frame.
In the embodiment, the arrangement of the measuring electrodes in the high-density electrical method instrument is that 8 measuring electrodes are arranged at equal intervals along the X-axis direction and the Y-axis direction at a unit electrode interval of 15.6cm to form a three-dimensional ERT electrode measuring network.
In the embodiment, the high-density electrical method instrument is used for collecting the water content information of the surrounding rocks of the roadway, the wireless network is used for connecting the detection nodes in the area into the wireless sensor network, the water content data of the nodes are transmitted and collected to one position through the wireless network, and finally, remote transmission is carried out.
And detecting the moisture content variation quantity through the resistivity spatial distribution characteristic by using the potential difference information and taking the standard moisture content of the surrounding rock of the roadway as a basis, and constructing a feedback mechanism according to the water level variation.
The feedback mechanism is mainly used for establishing a regulation strategy of the height of the warning water level according to the actual water content variation according to the safe water level threshold.
And the adjusting strategy is used for adjusting the dynamic change of the water content according to the result of demodulating the measuring electrode for detecting the water content of the inner wall of the roadway in real time by a dynamic double-threshold stripe counting detection method.
In this embodiment, the regulation strategy is controlled through a feedback signal, the control unit is mainly started according to the change difference of the measuring electrode signal to regulate the strategy, the detection of safe moisture content is realized by adopting an independent sensing element, and when the moisture content exceeds the warning value, the related rock wall stress monitoring module is started to prevent accidents caused by insufficient rock wall supporting force.
The dynamic double-threshold fringe counting detection method comprises the following steps:
firstly, simulating a Schmitt circuit by software, respectively setting an upper threshold and a lower threshold for an input counting signal, and calculating a node by using a Laview module to convert a sine wave of the counting signal into a rectangular wave signal;
secondly, solving a peak-to-peak value according to the maximum and minimum values of the collected counting signals in a period through a cyclic algorithm, multiplying the peak-to-peak value by a threshold ratio, and continuously updating the threshold;
and finally, any one of the upper and lower orthogonal signals is used as a fringe counting signal, the other one is used as a direction judging signal during fringe counting, when the light intensity of the counting signal reaches an upper threshold or a lower threshold, a counter can be triggered to start counting, and the light intensity of the direction judging signal is obtained so as to judge the rising or falling of the water content.
In this embodiment, the software-simulated schmitt circuit converts a periodically changing sinusoidal signal into a rectangular wave signal, and when the voltage value of the sinusoidal signal exceeds an upper threshold value in the process of changing from small to large, the schmitt circuit outputs a high-level pulse signal which continues until the voltage value of the sinusoidal signal is lower than a lower threshold value, and a low-level pulse signal is generated, so that the sinusoidal signal is converted into the rectangular wave signal, that is, only in two states of high and low levels, and a designed program module can enable the rising edge and the falling edge of the rectangular wave signal to be represented by the high-level pulse signal and the low-level pulse signal, thereby realizing the counting function. The method reduces the error counting caused by the fluctuation of the signal near the threshold, is hardly influenced by temperature and other external environments, greatly improves the stability and the anti-interference capability of the water content detection system, and reduces the cost of the system.
In the embodiment, the threshold is selected by mainly calculating the peak-to-peak value according to the maximum and minimum values of the collected counting signals in a period and multiplying the peak-to-peak value by the ratio of the threshold, so that the value of the threshold is continuously updated, the system can accurately count in long-term work, and the error is reduced.
In the embodiment, a double interference light path method is adopted to solve the direction-judging problem of a fringe counting method, two paths of orthogonal signals are in one-to-one correspondence with the trend of fringes, two paths of interference signals output by an interferometer are added and subtracted to obtain two paths of orthogonal signals, the two paths of signals can reflect the fringe movement rule caused by phase difference, any one of the two paths of orthogonal signals is used as a fringe counting signal, the other path of orthogonal signals is used as a direction-judging signal during fringe counting, when the light intensity of the counting signal reaches an upper threshold or a lower threshold, a counter can be triggered to start counting, the light intensity of the direction-judging signal is obtained at the moment, the change conditions of the light path signals have a determined correspondence with the water level change direction and are in one-to-one correspondence, and the light path signals are used as the basis for judging the water content rising or falling.
As shown in fig. 2, the in-situ testing system for dynamic water content of surrounding rock of a roadway comprises a high-density electrical method instrument 1 for acquiring water content data, a Zigbee module 2 for building a data transmission platform, and a wireless sensor 3, wherein the high-density electrical method instrument 1 detects potential measurement electrode information in real time by using an electrode measurement module 5 inside the high-density electrical method instrument, an output end of the electrode measurement module 5 is connected with an embedded processor 6 for amplifying and filtering potential measurement electrode signals and then transmitting the potential measurement electrode signals to the Zigbee module 2, and a signal end of the Zigbee module 2 is synchronized with the Laview module 2 through the wireless sensor 3 to build a real-time monitoring view.
In this embodiment, the high-density electrical method instrument 1 detects the water content of the rock wall under the control of the embedded processor 6, firstly, the embedded processor 6 generates a PWM frequency signal through an IO port and sends the PWM frequency signal to the transmitting module to amplify the power and drive the transducer to work, meanwhile, the CPU starts the timer to interrupt with the outside, the timer inside the embedded processor 6 starts counting to wait for the interrupt processor of the echo signal, when the echo signal is detected, the processor stops timing, reads the running time of the timer, meanwhile, the embedded processor 6 starts the internal temperature collecting module to collect the ambient temperature, and the embedded processor 6 calculates the water content according to the potential difference of the potential measurement electrode signal.
And the signal end of the embedded processor 6 is connected with a sending signal amplifying circuit 7 which amplifies the potential measuring electrode signal and supplies the amplified signal to the electrode measuring module 5 for excitation.
In this embodiment, the electrode measuring module 5 adopts a pole-pole two-stage measuring device, and its infinity electrodes B, N are arranged on both sides of the electricity to be measured on the rock wall, during data measurement, first, the first electrode in the electrode measuring network is used as a current electrode and supplies power to the current electrode, and the other electrodes are used as potential measuring electrodes, and under the control of the automatic electrode change-over switch, the corresponding potential difference is measured along the measuring point of the rock wall, and when the subsequent electrodes are supplied with power, the electrode potential with the electrode serial number smaller than the power supply electrode serial number does not need to be observed, so that the time required for measurement can be effectively shortened, and the working efficiency is improved.
And the signal end of the sending signal amplifying circuit 7 is connected with the electrode measuring module circuit by using a shielding wire.
In this embodiment, the transmission signal amplifying circuit 7 adopts a high-performance low-noise operational amplifier NE5532 manufactured by TI corporation, so that the entire transmission signal amplifying circuit 7 has a very high common mode rejection ratio, low static power consumption, and a power supply voltage of ± 22V, and meanwhile, the transmission signal amplifying circuit 7 has a large input impedance, and can improve the load carrying capability of an echo signal.
In this embodiment, the transmitting signal amplifying circuit 7 is connected to the electrode measuring module by a shielding wire, so that parasitic oscillation can be avoided and interference of electrical noise can be greatly reduced.
The output end of the transmitting signal amplifying circuit 7 is connected with a filtering and wave detecting circuit 8 for filtering clutter interference, and the feedback end of the filtering and wave detecting circuit 8 is connected with the electrode measuring module 5.
In this embodiment, the filtering and detecting circuit 8 is composed of an amplifier and an RC network, and after the echo signal passes through the high-frequency filtering and detecting circuit, only the echo signal with positive amplitude is left, which can provide a certain gain in the same frequency band range, and can complete the processing of filtering clutter interference of the echo signal.
The roadway surrounding rock dynamic water content in-situ test method and system based on the dynamic double-threshold stripe counting detection algorithm set the threshold value according to the actual water content variation, construct the cyclic algorithm to judge the water content to rise or fall, realize the intermittent operation mode of the whole system, greatly reduce the energy consumption of the system, effectively detect the water content variation and the water content, have strong anti-interference and high measurement precision, are not influenced by complex water environment, build a network and a Laview monitoring platform through a wireless sensing module and a ZigBee module, can record the water content variation rate in real time, not only ensure the integrity of information, but also can call out all historical records of the water content variation at any time, greatly improve the efficiency of data processing, enhance the long-term stability of the system, and construct the monitoring platform by using Laview to enable a user to know the whole process of signal processing through an interface, each interface is designed to be simple, and operation and real-time observation are easy.
Although the invention has been described in detail above with reference to a general description and specific examples, it will be apparent to one skilled in the art that modifications or improvements may be made thereto based on the invention. Accordingly, such modifications and improvements are intended to be within the scope of the invention as claimed.
Claims (10)
1. The in-situ testing method for the dynamic water content of the surrounding rock of the roadway is characterized by comprising the following steps of:
step 100, constructing a model for measuring environmental water volume change by using resistivity data of the inner wall of the surrounding rock of the roadway and electrode control information acquired by a high-density electrical method instrument;
200, detecting the water content of the inner wall of the tunnel in real time through potential measurement electrode information aiming at an environmental water volume change model, and demodulating a signal of the water content of the inner wall of the tunnel by adopting a dynamic double-threshold strip counting detection method so as to ensure that the lifting change accords with an expected value;
300, building a water quantity test platform connection number acquisition and data transmission module according to the demodulation signal, and monitoring the water quantity test platform connection number acquisition and data transmission module in real time through a Laview module;
and 400, constructing a control and information exchange processing center, and constructing a data interaction, sharing and sharing platform through a computer network.
2. The in-situ testing method for the dynamic water content of the surrounding rock of the roadway according to claim 1, wherein the high-density electrical method instrument in step 100 uses an aluminum alloy frame which is arranged on the surface of a rock body and is connected end to end around and sealed as a supporting body, and detects the potential difference at the designated electrode on the inner wall of the roadway through a measuring electrode.
3. The in-situ testing method for the dynamic water content of the surrounding rock of the roadway according to claim 2, characterized in that the potential difference information is utilized to detect the variation of the water content of the inner wall of the surrounding rock of the roadway through the resistivity spatial distribution characteristic based on the standard water content of the surrounding rock of the roadway, and a feedback mechanism is constructed according to the variation of the water level.
4. The in-situ testing method for the dynamic water content of the surrounding rock of the roadway according to claim 3, characterized in that the feedback mechanism mainly establishes a warning water level height according to a safe water level threshold value and implements an adjusting strategy for the water pump according to actual water content variation.
5. The in-situ testing method for the dynamic water content of the surrounding rock of the roadway according to claim 4, wherein the adjusting strategy is used for adjusting the dynamic change of the water content according to a result of demodulating a measuring electrode signal for detecting the water content of the inner wall of the roadway in real time by a dynamic double-threshold fringe counting detection method.
6. The in-situ testing method for the dynamic water content of the surrounding rock of the roadway according to claim 5, wherein the dynamic double-threshold stripe counting detection method comprises the following steps:
firstly, simulating a Schmitt circuit by software, respectively setting an upper threshold and a lower threshold for an input counting signal, and calculating a node by using a Laview module to convert a sine wave of the counting signal into a rectangular wave signal;
secondly, solving a peak-to-peak value according to the maximum and minimum values of the collected counting signals in a period through a cyclic algorithm, multiplying the peak-to-peak value by a threshold ratio, and continuously updating the threshold;
and finally, any one of the upper and lower orthogonal signals is used as a fringe counting signal, the other one is used as a direction judging signal during fringe counting, when the light intensity of the counting signal reaches an upper threshold or a lower threshold, a counter can be triggered to start counting, and the light intensity of the direction judging signal is obtained so as to judge the rising or falling of the water content.
7. The in-situ testing system for the dynamic water content of the surrounding rock of the roadway is characterized by comprising a high-density electrical method instrument (1) for collecting water content data, a Zigbee module (2) for building a data transmission platform and a wireless sensor (3), wherein the high-density electrical method instrument (1) utilizes an electrode measuring module (5) inside the high-density electrical method instrument to detect potential measuring electrode information in real time, the output end of the electrode measuring module (5) is connected with an embedded processor (6) to amplify, filter and transmit the potential measuring electrode information to the Zigbee module (2), and the signal end of the Zigbee module (2) is synchronized with the Laview module (4) through the wireless sensor (3) to establish a real-time monitoring view.
8. The roadway surrounding rock dynamic water content in-situ test system according to claim 7, characterized in that a signal end of the embedded processor (6) is connected with a transmission signal amplification circuit (7) for amplifying potential measurement electrode information and supplying the amplified potential measurement electrode information to the electrode measurement module (5) for excitation.
9. The roadway surrounding rock dynamic water content in-situ test system according to claim 8, wherein a signal end of the transmission signal amplification circuit (7) is connected with the electrode measurement module circuit by using a shielding wire.
10. The roadway surrounding rock dynamic water content in-situ test system according to claim 8, wherein the output end of the sending signal amplifying circuit (7) is connected with a filter detection circuit (8) for filtering clutter interference, and the feedback end of the filter detection circuit (8) is connected with the electrode measuring module (5).
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| 刘志民;刘希高;张金涛;周游;吕一鸣;吴淼;: "煤巷含水地质构造双频激电探测阻容模拟试验" * |
| 常治国;毛金峰;曹小红;春坚超;: "瞬变电磁法在采空区电性特征探测中的应用" * |
| 许兴亮;田素川;孟毅;张伟光;李春阁;王鹏;李金波;李永武;杨长德;: "动压软岩巷道围岩破坏机理及强化技术研究" * |
| 许华丽;许时昂;左汪会;席超强;: "利用电性参数监测巷道围岩变形模型试验研究" * |
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| CN111929349B (en) | 2023-03-31 |
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