CN112963202B - Rock burst monitoring and early warning method and system - Google Patents
Rock burst monitoring and early warning method and system Download PDFInfo
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- CN112963202B CN112963202B CN202110162902.5A CN202110162902A CN112963202B CN 112963202 B CN112963202 B CN 112963202B CN 202110162902 A CN202110162902 A CN 202110162902A CN 112963202 B CN112963202 B CN 112963202B
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- 238000012544 monitoring process Methods 0.000 title claims abstract description 223
- 239000011435 rock Substances 0.000 title claims abstract description 82
- 238000000034 method Methods 0.000 title claims abstract description 51
- 230000035939 shock Effects 0.000 claims description 34
- 238000004590 computer program Methods 0.000 claims description 10
- 238000004891 communication Methods 0.000 description 7
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- 230000006378 damage Effects 0.000 description 5
- 230000001066 destructive effect Effects 0.000 description 4
- 238000010586 diagram Methods 0.000 description 3
- 230000000694 effects Effects 0.000 description 3
- 238000005065 mining Methods 0.000 description 3
- 230000003287 optical effect Effects 0.000 description 3
- 238000012545 processing Methods 0.000 description 3
- 230000007123 defense Effects 0.000 description 2
- 230000005641 tunneling Effects 0.000 description 2
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- E—FIXED CONSTRUCTIONS
- E21—EARTH DRILLING; MINING
- E21F—SAFETY DEVICES, TRANSPORT, FILLING-UP, RESCUE, VENTILATION, OR DRAINING IN OR OF MINES OR TUNNELS
- E21F17/00—Methods or devices for use in mines or tunnels, not covered elsewhere
- E21F17/18—Special adaptations of signalling or alarm devices
- E21F17/185—Rock-pressure control devices with or without alarm devices; Alarm devices in case of roof subsidence
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- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02A—TECHNOLOGIES FOR ADAPTATION TO CLIMATE CHANGE
- Y02A10/00—TECHNOLOGIES FOR ADAPTATION TO CLIMATE CHANGE at coastal zones; at river basins
- Y02A10/23—Dune restoration or creation; Cliff stabilisation
Abstract
The invention provides a rock burst monitoring and early warning method and a system, wherein the method comprises the following steps: determining a monitoring geographical range of a vibration event according to the position of the vibration event in a to-be-detected area; determining a monitoring time range of the vibration event according to the occurrence time of the vibration event; and determining whether to pre-warn the impact danger caused by the vibration event according to the stress values of the anchor rod and the anchor cable in the monitoring geographical range in the monitoring time range. The invention realizes the joint monitoring of the vibration event and the stress conditions of the anchor rod and the anchor cable, so that the rock burst monitoring and early warning is more accurate.
Description
Technical Field
The invention relates to the technical field of coal mining, in particular to a rock burst monitoring and early warning method and system.
Background
Rock burst is a dynamic phenomenon of sudden and severe destruction, which often occurs with a bang or significant vibration, followed by instantaneous displacement and ejection of the coal (rock) mass. From the characterization of rock burst occurrence, vibration is a major feature of rock burst occurrence. Under strong vibration, surrounding rock of the roadway is damaged, and the supporting strength is reduced or fails, so that a large amount of coal bodies are thrown out, and impact damage is generated. Therefore, the dynamic load caused by mining influence, fault dislocation, roof fracture and the like is mostly the inducing factor of rock burst, and the increase of the bearing of the supporting body and the damage of the supporting body are the direct factors of surrounding rock impact.
At present, the rock burst monitoring method comprises microseism monitoring, ground sound monitoring, mining stress monitoring, electromagnetic radiation monitoring and the like, wherein the method is single-method monitoring, and accurate early warning results are difficult to obtain according to single monitoring results. Although a comprehensive monitoring and early warning platform exists currently, the monitoring and early warning method only carries out weighted calculation on the monitoring and early warning results of all monitoring systems. The objects or indexes monitored by the monitoring systems are different, so that the monitoring and early warning results are directly weighted and calculated, and the rock burst monitoring and early warning accuracy is low.
Disclosure of Invention
The invention provides a rock burst monitoring and early warning method and system, which are used for solving the defect of inaccurate rock burst monitoring and early warning in the prior art and realizing accurate monitoring and early warning of rock burst.
The invention provides a rock burst monitoring and early warning method, which comprises the following steps:
determining a monitoring geographical range of a vibration event according to the position of the vibration event in a to-be-detected area;
determining a monitoring time range of the vibration event according to the occurrence time of the vibration event;
and determining whether to pre-warn the impact danger caused by the vibration event according to the stress values of the anchor rod and the anchor cable in the monitoring geographical range in the monitoring time range.
According to the rock burst monitoring and early warning method provided by the invention, whether the impact danger caused by the vibration event is early warned or not is determined according to the stress values of the anchor rod and the anchor cable in the monitoring time range, wherein the stress values are in the monitoring geographic range, and the method comprises the following steps:
if the stress values of the anchor rod and the anchor cable meet preset early warning conditions, early warning is carried out on impact danger caused by the vibration event;
the preset early warning condition comprises that the absolute value of the stress value of any anchor rod or anchor cable is larger than or equal to a first preset threshold value, the increment in the monitoring time range is larger than or equal to a second preset threshold value, or the increment sum of any anchor rod or anchor cable caused by all vibration events in the area to be detected in a preset time period is larger than or equal to a third preset threshold value, and the preset time period comprises a time period in the monitoring time range and a time period immediately before the monitoring time range.
According to the rock burst monitoring and early warning method provided by the invention, the monitoring geographical range of the vibration event is determined according to the position of the vibration event in the to-be-detected area, and the method comprises the following steps:
and determining the monitoring geographical range according to the energy value of the vibration event and the position.
According to the rock burst monitoring and early warning method provided by the invention, the monitoring time range of the vibration event is determined according to the occurrence time of the vibration event, and the method comprises the following steps:
and determining the monitoring time range according to the energy value of the vibration event and the occurrence time.
According to the rock burst monitoring and early warning method provided by the invention, the stress value of the anchor rod is obtained by monitoring through the anchor rod force transducer;
and the stress value of the anchor cable is obtained by monitoring by using an anchor cable force transducer.
According to the rock burst monitoring and early warning method provided by the invention, the position of the vibration event is determined according to the position of the vibration sensor;
the energy value of the shock event is acquired using the shock sensor monitoring.
According to the rock burst monitoring and early warning method provided by the invention, whether the impact danger caused by the vibration event is early warned is determined according to the stress values of the anchor rod and the anchor cable in the monitoring geographical range in the monitoring time range, and the method further comprises the following steps:
and synchronizing and timing the clock of the vibration sensor, the clock of the anchor rope force transducer and the clock of the anchor rod force transducer by using a GPS clock.
The invention also provides a rock burst monitoring and early warning system, which comprises:
the first determining module is used for determining the monitoring geographical range of the vibration event according to the position of the vibration event in the region to be detected;
the second determining module is used for determining the monitoring time range of the vibration event according to the occurrence time of the vibration event;
and the early warning module is used for determining whether to early warn the impact danger caused by the vibration event according to the stress values of the anchor rod and the anchor cable in the monitoring time range.
The invention also provides electronic equipment, which comprises a memory, a processor and a computer program stored in the memory and capable of running on the processor, wherein the processor realizes the steps of any rock burst monitoring and early warning method when executing the computer program.
The invention also provides a non-transitory computer readable storage medium having stored thereon a computer program which, when executed by a processor, implements the steps of the rock burst monitoring and warning method as described in any of the above.
According to the rock burst monitoring and early warning method and system, the monitoring geographical range of the vibration event is determined according to the position of the vibration event, the monitoring time range of the vibration event is determined according to the occurrence time of the vibration event, on the basis of monitoring the vibration event, whether the impact danger caused by the vibration event is early warned or not is determined according to the stress values of the anchor rod and the anchor cable which are positioned in the monitoring geographical range and in the monitoring time range, and the rock burst monitoring and early warning is more accurate by jointly monitoring the stress conditions of the vibration event, the anchor rod and the anchor cable.
Drawings
In order to more clearly illustrate the invention or the technical solutions of the prior art, the following description will briefly explain the drawings used in the embodiments or the description of the prior art, and it is obvious that the drawings in the following description are some embodiments of the invention, and other drawings can be obtained according to the drawings without inventive effort for a person skilled in the art.
FIG. 1 is a schematic flow chart of a rock burst monitoring and early warning method provided by the invention;
FIG. 2 is a schematic diagram of the rock burst monitoring and early warning system provided by the invention;
fig. 3 is a schematic structural diagram of an electronic device provided by the present invention.
Detailed Description
For the purpose of making the objects, technical solutions and advantages of the present invention more apparent, the technical solutions of the present invention will be clearly and completely described below with reference to the accompanying drawings, and it is apparent that the described embodiments are some embodiments of the present invention, not all embodiments. All other embodiments, which can be made by those skilled in the art based on the embodiments of the invention without making any inventive effort, are intended to be within the scope of the invention.
The rock burst monitoring and early warning method of the invention is described below with reference to fig. 1, and comprises the following steps: step 101, determining a monitoring geographical range of a vibration event according to the position of the vibration event in a region to be detected;
the region to be detected is a region needing rock burst monitoring and early warning, and can be any stope or tunneling working face roadway. The location at which the shock event occurs is in three dimensional space coordinates, including x, y and z coordinates. The location at which the shock event occurs can be determined by analyzing the characteristics of the seismic waves generated after the shock event occurred.
After any vibration event occurs, the surrounding rock of the roadway at the occurrence position can be influenced, and surrounding rock of the roadway near the occurrence position can be influenced. The impact range of the vibration event, i.e. the monitored geographical location of the vibration event, can be determined based on the location of the occurrence of the vibration event. The method for determining the monitored geographic position of the vibration event can be to define a preset area according to the position of the vibration event, and take the preset area as the monitored geographic position; or may be determined based on the location of the occurrence of the shock event and the resulting seismic wave. The present embodiments are not limited in the manner in which the monitored geographic extent of the shock event is determined.
102, determining a monitoring time range of the vibration event according to the occurrence time of the vibration event;
specifically, after a shock event occurs, its effect does not disappear immediately and continues for a period of time. And the vibration event can also affect the surrounding rock of the roadway near the position of the vibration event in the duration.
The monitoring time range of the vibration event may be determined according to the occurrence time of the vibration event. The monitoring time range may include a period of time before the shock event occurs and a duration of the impact of the shock event. The method for determining the monitoring time range of the vibration event may be to set a preset time range according to the time of occurrence of the vibration event, and take the preset time range as the monitoring time range; or may be determined based on the time of occurrence of the shock event and the generated seismic wave. The present embodiment is not limited to the manner in which the monitoring time range of the shock event is determined.
And step 103, determining whether to pre-warn the impact danger caused by the vibration event according to the stress values of the anchor rod and the anchor cable in the monitoring geographical range in the monitoring time range.
The number of the anchor rods and the anchor cables in the monitoring geographical range is determined according to the positions of the anchor rods and the anchor cables and the size of the monitoring geographical range. And after a vibration event occurs, the anchor rod and the anchor cable in the monitoring geographical range are affected. The influence of the vibration event on the anchor rod and the anchor cable can be analyzed through the stress values of the anchor rod and the anchor cable.
As the surrounding rock support of the roadway is the last defense line for preventing rock burst. The roadway surrounding rock support comprises anchor rods and anchor cables. Therefore, whether the impact danger caused by the vibration event is early-warned or not can be determined according to the stress values of the anchor rod and the anchor cable in the monitoring time range. Firstly, the stress values of the anchor rod and the anchor cable in the monitoring geographical range in the monitoring time range can be obtained according to the monitoring geographical range and the monitoring time range. Then, by analyzing the stress values of each anchor rod and each anchor cable, whether the impact danger caused by the vibration event is pre-warned or not is determined.
Compared with the prior art, the embodiment carries out joint monitoring on the vibration event and the stress conditions of the anchor rod and the anchor cable. And monitoring stress conditions of the anchor rod and the anchor cable while monitoring vibration events in the to-be-detected area, analyzing stress change conditions of the anchor rod and the anchor cable caused by vibration, and analyzing the stress change conditions in a combined mode to obtain influences of different vibration events on surrounding rock support of the roadway. Wherein the shock event includes destructive and non-destructive events. And determining whether to pre-warn impact danger caused by the vibration event according to the influence on the anchor rod and the anchor cable after the vibration event. The dynamic load, namely a vibration event, which induces rock burst and the roadway surrounding rock support which resists the rock burst are comprehensively considered, so that the accuracy of rock burst monitoring and early warning can be effectively improved.
According to the method, the monitoring geographical range of the vibration event is determined according to the position of the vibration event, the monitoring time range of the vibration event is determined according to the occurrence time of the vibration event, on the basis of monitoring the vibration event, whether the impact danger caused by the vibration event is early-warned or not is determined according to the stress values of the anchor rod and the anchor cable in the monitoring geographical range and the monitoring time range, and the impact ground pressure monitoring early-warning is more accurate by jointly monitoring the stress conditions of the vibration event, the anchor rod and the anchor cable.
On the basis of the foregoing embodiment, in this embodiment, determining whether to pre-warn the impact risk caused by the vibration event according to the stress values of the anchor rod and the anchor cable located in the monitoring geographical range in the monitoring time range includes: if the stress values of the anchor rod and the anchor cable meet preset early warning conditions, early warning is carried out on impact danger caused by the vibration event; the preset early warning condition comprises that the absolute value of the stress value of any anchor rod or anchor cable is larger than or equal to a first preset threshold value, the increment in the monitoring time range is larger than or equal to a second preset threshold value, or the increment sum of any anchor rod or anchor cable caused by all vibration events in the area to be detected in a preset time period is larger than or equal to a third preset threshold value, and the preset time period comprises a time period in the monitoring time range and a time period immediately before the monitoring time range.
Specifically, a single shock event may not cause an impact to appear, but may have a certain impact on the surrounding rock support in the area where the impact occurs, and the cumulative impact of multiple shock events may cause the surrounding rock support to break, thereby creating an impact hazard. Therefore, when determining whether to pre-warn the impact danger caused by the vibration event, not only the stress values of the anchor rod and the anchor cable in the monitoring time range, but also the change of the stress values in the monitoring time range, and the total change of the stress values caused by all the vibration events in the area to be tested in the preset time period are considered.
When the stress value of any anchor rod or anchor cable exceeds the limit, the supporting strength of the anchor rod or anchor cable can be reduced or failed, so that a large amount of coal bodies are thrown out, and impact damage is generated. The absolute value of the stress value of any anchor rod or anchor cable in the monitoring time range within the monitoring geographical range can be compared with a first preset threshold value, if the absolute value is larger than or equal to the first preset threshold value, the anchor rod or anchor cable exceeds the limit, and then the impact danger caused by the vibration event is pre-warned. The first preset threshold value may be a first preset percentage of yield strength of the anchor rod or the anchor cable, and the first preset percentage may be set according to actual requirements, for example, 80%. The yield strength is the yield limit of the metal material when yielding, i.e. the stress against minor plastic deformation.
Or comparing the increment of the stress value of the anchor rod or the anchor cable in the monitoring time range with a second preset threshold value, and if the increment of the stress value of the anchor rod or the anchor cable is larger than or equal to the first preset threshold value, indicating that the influence of the vibration event on the anchor rod or the anchor cable is larger, and early warning the impact danger caused by the vibration event. The second preset threshold value may be a second preset percentage of yield strength of the anchor rod or the anchor cable, and the second preset percentage may be set according to actual requirements, for example, 10%.
Or comparing the increment sum of the anchor rod or the anchor cable caused by all the vibration events in the region to be detected in the preset period with a third preset threshold value, if the increment sum is larger than or equal to the first preset threshold value, indicating that the accumulation influence of all the vibration events on the anchor rod or the anchor cable in the preset period is larger, and early warning the impact danger caused by the vibration events. The third preset threshold value may be a third preset percentage of yield strength of the anchor rod or the anchor cable, and the third preset percentage may be set according to actual requirements, for example, 30%. The preset period may be set according to actual requirements, such as a day.
After the impact danger caused by the vibration event is pre-warned, rock burst danger eliminating measures can be adopted, and the support is timely reinforced.
Because rock burst occurs, on one hand, the surrounding rock stress is concentrated under the action of the disturbance of the load; on the other hand, when the surrounding rock support cannot resist surrounding rock deformation caused by stress concentration, impact type surrounding rock damage occurs. The method and the device mainly monitor the influence on the stress condition of the roadway support after the vibration event occurs, and further realize early warning of rock burst, so that the early warning result is more accurate.
Based on the foregoing embodiment, in this embodiment, determining, according to a location of a vibration event in a to-be-detected area, a monitoring geographical range of the vibration event includes: and determining the monitoring geographical range according to the energy value of the vibration event and the position.
Specifically, the energy value and location of the vibration event may be integrated to determine the monitored geographic extent of the vibration event. When the energy value of the vibration event is larger, the influence range is larger, and accordingly the monitoring geographical range can be enlarged, so that more accurate and rich monitoring information can be obtained.
On the basis of the foregoing embodiment, in this embodiment, determining the monitoring time range of the vibration event according to the occurrence time of the vibration event includes: and determining the monitoring time range according to the energy value of the vibration event and the occurrence time.
Specifically, the energy value and the occurrence time of the vibration event can be integrated to determine the monitoring time range of the vibration event. When the energy value of the vibration event is larger, the duration time is longer, and accordingly the monitoring time range can be increased, so that more accurate and rich monitoring information can be obtained.
On the basis of the above embodiments, the stress value of the anchor rod in the present embodiment is obtained by monitoring with an anchor rod load cell; and the stress value of the anchor cable is obtained by monitoring by using an anchor cable force transducer.
Specifically, when monitoring the anchor rods and the anchor cables, the stress values of the anchor rods and the anchor cables can be continuously monitored on line through the anchor rod stress sensor and the anchor cable stress sensor in the monitoring area range, the position coordinates of each anchor rod and each anchor cable are determined, and the time for collecting the stress values of each anchor rod and each anchor cable is ensured. The anchor rod force transducer and the anchor cable force transducer are mainly used for monitoring the stress conditions of the anchor rods and the anchor cables of the mine tunnel and indirectly reflecting the stability conditions of surrounding rocks of the tunnel. The sampling frequency of the anchor rod force transducer and the anchor cable force transducer can be set according to actual requirements, such as seconds or milliseconds. The stress conditions of the anchor rod and the anchor cable can be reflected in real time.
The coal wall is smooth in the area to be measured, and the anchor rod force transducer and the anchor cable force transducer are arranged in the area with no obvious geological structure on the periphery. The deployment of each station can be set according to actual requirements. For example, each station may include 1 bolt force monitoring section and 1 cable force section. The anchor rod stress monitoring section can monitor 2 anchor rods of the top plate, the left side wall and the right side wall respectively, and the anchor cable stress section only monitors 2 top plate anchor cables. The number of measuring stations can be set according to the size of the area to be measured. The interval of the measuring stations can be set according to actual requirements, for example, 50-150 m.
Based on the above embodiments, the position of the vibration event in this embodiment is determined according to the position of the vibration sensor; the energy value of the shock event is acquired using the shock sensor monitoring.
Specifically, when monitoring the vibration event, the energy value of the vibration event can be obtained in real time through the vibration sensor arranged in the area to be tested, and the occurrence time and the occurrence position of each vibration event can be determined. The vibration sensor is used for monitoring the law of vibration activity under the mine and reflecting the dynamic load occurrence condition of the stope space. The installation position of the vibration sensor can be the end head of an anchor rod at the top of a roadway under a mine. The number of vibration sensors may be set according to the size of the area to be measured, but is not less than 4. The interval between each vibration sensor can be set according to actual demands and can be 200-800 m. In addition, each vibration sensor can be numbered, so that data for monitoring vibration events can be collected conveniently.
Based on the above embodiment, in this embodiment, determining whether to pre-warn the impact danger caused by the vibration event according to the stress values of the anchor rod and the anchor cable in the monitoring time range, where the stress values are located in the monitoring geographic range, includes: and synchronizing and timing the clock of the vibration sensor, the clock of the anchor rope force transducer and the clock of the anchor rod force transducer by using a GPS clock.
The GPS (Global Positioning System ) clock is time-service based on GPS high-precision positioning. The clock of the vibration sensor, the clock of the anchor rope force transducer and the clock of the anchor rod force transducer are synchronously time-shared by using the GPS clock, so that the time synchronization of the clock of the vibration sensor, the clock of the anchor rope force transducer and the clock of the anchor rod force transducer is realized, and the joint monitoring and analysis of the anchor rod and the anchor rope in the monitoring geographic range of the vibration event and the vibration event are facilitated.
In addition, the monitoring data collected by the vibration sensor, the anchor rod force transducer and the anchor rope force transducer can be transmitted to a ground central station through a communication cable or an optical cable, and the ground central station is connected with a GPS clock, so that the time of the data collected by the vibration sensor, the anchor rod force transducer and the anchor rope force transducer is consistent. And then, processing the acquired data by the comprehensive processing module according to the rock burst monitoring and early warning method to acquire the result of the rock burst monitoring and early warning. The monitoring data graph display module can be used for displaying the data analysis and processing results in a graph mode. The display content comprises a plan view of the area to be detected, the occurrence time, the position, the energy of the vibration event, the stress value and the increment of the stress value of the anchor rod and the anchor cable which are positioned in the monitoring geographical range in the monitoring time range, and an early warning prompt for the condition meeting the preset early warning condition.
The rock burst monitoring and early warning system provided by the invention is described below, and the rock burst monitoring and early warning system described below and the rock burst monitoring and early warning method described above can be referred to correspondingly.
As shown in fig. 2, the rock burst monitoring and early warning system provided in this embodiment includes a first determining module 201, a second determining module 202 and an early warning module 203, where:
the first determining module 201 is configured to determine a monitored geographical range of a vibration event according to a location of the vibration event in a region to be detected;
the region to be detected is a region needing rock burst monitoring and early warning, and can be any stope or tunneling working face roadway. The location at which the shock event occurs is in three dimensional space coordinates, including x, y and z coordinates. The location at which the shock event occurs can be determined by analyzing the characteristics of the seismic waves generated after the shock event occurred.
After the vibration event occurs, the surrounding rock of the roadway at the occurrence position can be influenced, and surrounding rock of the roadway near the occurrence position can be influenced. The impact range of the vibration event, i.e. the monitored geographical location of the vibration event, can be determined based on the location of the occurrence of the vibration event. The method for determining the monitored geographic position of the vibration event can be to define a preset area according to the position of the vibration event, and take the preset area as the monitored geographic position; or may be determined based on the location of the occurrence of the shock event and the resulting seismic wave. The present embodiments are not limited in the manner in which the monitored geographic extent of the shock event is determined.
The second determining module 202 is configured to determine a monitoring time range of the vibration event according to the occurrence time of the vibration event;
specifically, after a shock event occurs, its effect may last for a period of time. And the vibration event can also affect the surrounding rock of the roadway near the position of the vibration event in the duration.
The monitoring time range of the vibration event may be determined according to the occurrence time of the vibration event. The monitoring time range may include a period of time before the shock event occurs and a duration of the shock event. The method for determining the monitoring time range of the vibration event may be to set a preset time range according to the time of occurrence of the vibration event, and take the preset time range as the monitoring time range; or may be determined based on the time of occurrence of the shock event and the generated seismic wave. The present embodiment is not limited to the manner in which the monitoring time range of the shock event is determined.
The early warning module 203 is configured to determine whether to early warn the impact danger caused by the vibration event according to the stress values of the anchor rod and the anchor cable in the monitoring time range.
The number of the anchor rods and the anchor cables in the monitoring geographical range is determined according to the positions of the anchor rods and the anchor cables and the size of the monitoring geographical range. And after a vibration event occurs, the anchor rod and the anchor cable in the monitoring geographical range are affected. The influence of the vibration event on the anchor rod and the anchor cable can be analyzed through the stress values of the anchor rod and the anchor cable.
As the surrounding rock support of the roadway is the last defense line for preventing rock burst. The roadway surrounding rock support comprises anchor rods and anchor cables. Therefore, whether the impact danger caused by the vibration event is early-warned or not can be determined according to the stress values of the anchor rod and the anchor cable in the monitoring time range. Firstly, the stress values of the anchor rod and the anchor cable in the monitoring geographical range in the monitoring time range can be obtained according to the monitoring geographical range and the monitoring time range. Then, by analyzing the stress values of each anchor rod and each anchor cable, whether the impact danger caused by the vibration event is pre-warned or not is determined.
Compared with the prior art, the embodiment carries out joint monitoring on the vibration event and the stress conditions of the anchor rod and the anchor cable. And monitoring stress conditions of the anchor rod and the anchor cable while monitoring vibration events in the to-be-detected area, analyzing stress change conditions of the anchor rod and the anchor cable caused by vibration, and analyzing the stress change conditions in a combined mode to obtain influences of different vibration events on surrounding rock support of the roadway. Wherein the shock event includes destructive and non-destructive events. And determining whether to pre-warn impact danger caused by the vibration event according to the influence on the anchor rod and the anchor cable after the vibration event. The dynamic load, namely a vibration event, which induces rock burst and the roadway surrounding rock support which resists the rock burst are comprehensively considered, so that the accuracy of rock burst monitoring and early warning can be effectively improved.
According to the method, the monitoring geographical range of the vibration event is determined according to the position of the vibration event, the monitoring time range of the vibration event is determined according to the occurrence time of the vibration event, on the basis of monitoring the vibration event, whether the impact danger caused by the vibration event is early-warned or not is determined according to the stress values of the anchor rod and the anchor cable in the monitoring geographical range and the monitoring time range, and the impact ground pressure monitoring early-warning is more accurate by jointly monitoring the stress conditions of the vibration event, the anchor rod and the anchor cable.
Based on the foregoing embodiments, the early warning module in this embodiment is specifically configured to: if the stress values of the anchor rod and the anchor cable meet preset early warning conditions, early warning is carried out on impact danger caused by the vibration event; the preset early warning condition comprises that the absolute value of the stress value of any anchor rod or anchor cable is larger than or equal to a first preset threshold value, the increment in the monitoring time range is larger than or equal to a second preset threshold value, or the increment sum of any anchor rod or anchor cable caused by all vibration events in the area to be detected in a preset time period is larger than or equal to a third preset threshold value, and the preset time period comprises a time period in the monitoring time range and a time period immediately before the monitoring time range.
On the basis of the foregoing embodiment, the first determining module in this embodiment is specifically configured to: and determining the monitoring geographical range according to the energy value of the vibration event and the position.
On the basis of the foregoing embodiment, the second determining module in this embodiment is specifically configured to: and determining the monitoring time range according to the energy value of the vibration event and the occurrence time.
On the basis of the above embodiments, the stress value of the anchor rod in the present embodiment is obtained by monitoring with an anchor rod load cell; and the stress value of the anchor cable is obtained by monitoring by using an anchor cable force transducer.
Based on the above embodiments, the position of the vibration event in this embodiment is determined according to the position of the vibration sensor; the energy value of the shock event is acquired using the shock sensor monitoring.
On the basis of the above embodiment, the present embodiment further includes a synchronous time service module specifically configured to: and synchronizing and timing the clock of the vibration sensor, the clock of the anchor rope force transducer and the clock of the anchor rod force transducer by using a GPS clock.
Fig. 3 illustrates a physical schematic diagram of an electronic device, as shown in fig. 3, where the electronic device may include: processor 301, communication interface (Communications Interface) 302, memory (memory) 303 and communication bus 304, wherein processor 301, communication interface 302, memory 303 accomplish the communication between each other through communication bus 304. The processor 301 may invoke logic instructions in the memory 303 to perform a rock burst monitoring and early warning method comprising: determining a monitoring geographical range of a vibration event according to the position of the vibration event in a to-be-detected area; determining a monitoring time range of the vibration event according to the occurrence time of the vibration event; and determining whether to pre-warn the impact danger caused by the vibration event according to the stress values of the anchor rod and the anchor cable in the monitoring geographical range in the monitoring time range.
Further, the logic instructions in the memory 303 may be implemented in the form of software functional units and stored in a computer readable storage medium when sold or used as a stand alone product. Based on this understanding, the technical solution of the present invention may be embodied essentially or in a part contributing to the prior art or in a part of the technical solution, in the form of a software product stored in a storage medium, comprising several instructions for causing a computer device (which may be a personal computer, a server, a network device, etc.) to perform all or part of the steps of the method according to the embodiments of the present invention. And the aforementioned storage medium includes: a U-disk, a removable hard disk, a Read-Only Memory (ROM), a random access Memory (RAM, random Access Memory), a magnetic disk, or an optical disk, or other various media capable of storing program codes.
In another aspect, the present invention also provides a computer program product comprising a computer program stored on a non-transitory computer readable storage medium, the computer program comprising program instructions which, when executed by a computer, enable the computer to perform the rock burst monitoring and warning method provided by the above methods, the method comprising: determining a monitoring geographical range of a vibration event according to the position of the vibration event in a to-be-detected area; determining a monitoring time range of the vibration event according to the occurrence time of the vibration event; and determining whether to pre-warn the impact danger caused by the vibration event according to the stress values of the anchor rod and the anchor cable in the monitoring geographical range in the monitoring time range.
In yet another aspect, the present invention further provides a non-transitory computer readable storage medium having stored thereon a computer program which, when executed by a processor, is implemented to perform the rock burst monitoring and early warning methods provided above, the method comprising: determining a monitoring geographical range of a vibration event according to the position of the vibration event in a to-be-detected area; determining a monitoring time range of the vibration event according to the occurrence time of the vibration event; and determining whether to pre-warn the impact danger caused by the vibration event according to the stress values of the anchor rod and the anchor cable in the monitoring geographical range in the monitoring time range.
The system embodiments described above are merely illustrative, wherein the elements illustrated as separate elements may or may not be physically separate, and the elements shown as elements may or may not be physical elements, may be located in one place, or may be distributed over a plurality of network elements. Some or all of the modules may be selected according to actual needs to achieve the purpose of the solution of this embodiment. Those of ordinary skill in the art will understand and implement the present invention without undue burden.
From the above description of the embodiments, it will be apparent to those skilled in the art that the embodiments may be implemented by means of software plus necessary general hardware platforms, or of course may be implemented by means of hardware. Based on this understanding, the foregoing technical solution may be embodied essentially or in a part contributing to the prior art in the form of a software product, which may be stored in a computer readable storage medium, such as ROM/RAM, a magnetic disk, an optical disk, etc., including several instructions for causing a computer device (which may be a personal computer, a server, or a network device, etc.) to execute the method described in the respective embodiments or some parts of the embodiments.
Finally, it should be noted that: the above embodiments are only for illustrating the technical solution of the present invention, and are not limiting; although the invention has been described in detail with reference to the foregoing embodiments, it will be understood by those of ordinary skill in the art that: the technical scheme described in the foregoing embodiments can be modified or some technical features thereof can be replaced by equivalents; such modifications and substitutions do not depart from the spirit and scope of the technical solutions of the embodiments of the present invention.
Claims (9)
1. The rock burst monitoring and early warning method is characterized by comprising the following steps of:
determining a monitoring geographical range of a vibration event according to the position of the vibration event in a to-be-detected area;
determining a monitoring time range of the vibration event according to the occurrence time of the vibration event;
determining whether to pre-warn impact danger caused by the vibration event according to stress values of the anchor rod and the anchor cable in the monitoring time range in the monitoring geographic range;
the determining whether to pre-warn the impact danger caused by the vibration event according to the stress values of the anchor rod and the anchor cable in the monitoring geographical range in the monitoring time range comprises the following steps:
if the stress values of the anchor rod and the anchor cable meet preset early warning conditions, early warning is carried out on impact danger caused by the vibration event;
the preset early warning condition comprises that the absolute value of the stress value of any anchor rod or anchor cable is larger than or equal to a first preset threshold value, the increment in the monitoring time range is larger than or equal to a second preset threshold value, or the increment sum of any anchor rod or anchor cable caused by all vibration events in a region to be detected in a preset time period is larger than or equal to a third preset threshold value, wherein the preset time period comprises a time period in the monitoring time range and a time period immediately before the monitoring time range; the first predetermined threshold is determined based on a first predetermined percentage of the yield strength of the bolt or cable; the second predetermined threshold is determined based on a second predetermined percentage of the yield strength of the bolt or cable; the third predetermined threshold is determined based on a third predetermined percentage of the yield strength of the bolt or cable.
2. The method for rock burst monitoring and early warning according to claim 1, wherein the determining the monitoring geographical range of the vibration event according to the position of the vibration event in the to-be-monitored area comprises:
and determining the monitoring geographical range according to the energy value of the vibration event and the position.
3. The method of claim 1, wherein determining the monitoring time range of the vibration event according to the occurrence time of the vibration event comprises:
and determining the monitoring time range according to the energy value of the vibration event and the occurrence time.
4. The rock burst monitoring and early warning method according to any one of claims 1 to 3, wherein the stress value of the anchor rod is obtained by monitoring by using an anchor rod force sensor;
and the stress value of the anchor cable is obtained by monitoring by using an anchor cable force transducer.
5. The method of claim 4, wherein the location of the shock event is determined based on the location of a shock sensor;
the energy value of the shock event is acquired using the shock sensor monitoring.
6. The method for rock burst monitoring and early warning according to claim 5, wherein the determining whether to early warn the impact danger caused by the vibration event according to the stress values of the anchor rod and the anchor cable in the monitoring geographical range in the monitoring time range further comprises:
and synchronizing and timing the clock of the vibration sensor, the clock of the anchor rope force transducer and the clock of the anchor rod force transducer by using a GPS clock.
7. The utility model provides a rock burst monitoring early warning system which characterized in that includes:
the first determining module is used for determining the monitoring geographical range of the vibration event according to the position of the vibration event in the region to be detected;
the second determining module is used for determining the monitoring time range of the vibration event according to the occurrence time of the vibration event;
the early warning module is used for determining whether to early warn impact danger caused by the vibration event according to stress values of the anchor rod and the anchor cable in the monitoring time range;
the early warning module is specifically configured to:
if the stress values of the anchor rod and the anchor cable meet preset early warning conditions, early warning is carried out on impact danger caused by the vibration event;
the preset early warning condition comprises that the absolute value of the stress value of any anchor rod or anchor cable is larger than or equal to a first preset threshold value, the increment in the monitoring time range is larger than or equal to a second preset threshold value, or the increment sum of any anchor rod or anchor cable caused by all vibration events in a region to be detected in a preset time period is larger than or equal to a third preset threshold value, wherein the preset time period comprises a time period in the monitoring time range and a time period immediately before the monitoring time range; the first predetermined threshold is determined based on a first predetermined percentage of the yield strength of the bolt or cable; the second predetermined threshold is determined based on a second predetermined percentage of the yield strength of the bolt or cable; the third predetermined threshold is determined based on a third predetermined percentage of the yield strength of the bolt or cable.
8. An electronic device comprising a memory, a processor and a computer program stored on the memory and executable on the processor, wherein the processor, when executing the program, implements the steps of the rock burst monitoring and warning method of any one of claims 1 to 6.
9. A non-transitory computer readable storage medium having stored thereon a computer program, wherein the computer program when executed by a processor implements the steps of the rock burst monitoring and warning method according to any one of claims 1 to 6.
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| CN202883017U (en) * | 2012-11-09 | 2013-04-17 | 山西潞安环保能源开发股份有限公司 | Online monitoring and pre-warning system for coal mine anchor cable stress |
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