CN113266421A - Comprehensive early warning method for full-dangerous period time and space of rock burst - Google Patents
Comprehensive early warning method for full-dangerous period time and space of rock burst Download PDFInfo
- Publication number
- CN113266421A CN113266421A CN202110610766.1A CN202110610766A CN113266421A CN 113266421 A CN113266421 A CN 113266421A CN 202110610766 A CN202110610766 A CN 202110610766A CN 113266421 A CN113266421 A CN 113266421A
- Authority
- CN
- China
- Prior art keywords
- monitoring system
- early warning
- rock burst
- dangerous
- space
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Granted
Links
- 239000011435 rock Substances 0.000 title claims abstract description 78
- 238000000034 method Methods 0.000 title claims abstract description 62
- 238000012544 monitoring process Methods 0.000 claims abstract description 171
- 230000005670 electromagnetic radiation Effects 0.000 claims abstract description 41
- 230000008569 process Effects 0.000 claims abstract description 28
- 208000013201 Stress fracture Diseases 0.000 claims abstract description 23
- 208000010392 Bone Fractures Diseases 0.000 claims abstract description 17
- 206010017076 Fracture Diseases 0.000 claims abstract description 17
- 230000000977 initiatory effect Effects 0.000 claims abstract description 8
- 238000005065 mining Methods 0.000 claims description 8
- 230000002159 abnormal effect Effects 0.000 claims description 7
- 230000008859 change Effects 0.000 claims description 5
- 238000009826 distribution Methods 0.000 claims description 5
- 238000004891 communication Methods 0.000 claims description 4
- 230000000750 progressive effect Effects 0.000 abstract description 7
- 239000003245 coal Substances 0.000 description 11
- 238000004519 manufacturing process Methods 0.000 description 5
- 238000004364 calculation method Methods 0.000 description 3
- 230000000694 effects Effects 0.000 description 3
- 238000005336 cracking Methods 0.000 description 2
- 238000010586 diagram Methods 0.000 description 2
- 238000012986 modification Methods 0.000 description 2
- 230000004048 modification Effects 0.000 description 2
- 230000002265 prevention Effects 0.000 description 2
- 230000009471 action Effects 0.000 description 1
- 230000004075 alteration Effects 0.000 description 1
- 230000009286 beneficial effect Effects 0.000 description 1
- 238000005516 engineering process Methods 0.000 description 1
- 230000035784 germination Effects 0.000 description 1
- 238000009434 installation Methods 0.000 description 1
- 230000035515 penetration Effects 0.000 description 1
- 238000011160 research Methods 0.000 description 1
- 230000000630 rising effect Effects 0.000 description 1
Images
Classifications
-
- E—FIXED CONSTRUCTIONS
- E21—EARTH OR ROCK 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
Landscapes
- Engineering & Computer Science (AREA)
- Mining & Mineral Resources (AREA)
- Life Sciences & Earth Sciences (AREA)
- General Life Sciences & Earth Sciences (AREA)
- Geochemistry & Mineralogy (AREA)
- Geology (AREA)
- Geophysics And Detection Of Objects (AREA)
Abstract
The invention discloses a time-space comprehensive early warning method for a total dangerous period of rock burst, which comprises the following steps: installing a micro-seismic monitoring system in a mine to be pre-warned so as to determine a local impact dangerous area from the full mine scale; arranging an electromagnetic radiation monitoring system in the local impact dangerous area to detect a stress concentration area in real time; arranging a ground sound monitoring system in the stress concentration area; monitoring the full-danger period of the mine rock burst to be pre-warned through an electromagnetic radiation monitoring system and a ground sound monitoring system in combination with a micro-seismic monitoring system; and the comprehensive early warning of the whole dangerous period of the rock burst from stress concentration, micro-fracture generation and micro-fracture link-up to form large-scale fracture to the whole process of the rock burst generation is carried out by combining with the preset space-time early warning indexes. Based on the specific early warning principle and advantages of each early warning system, the invention realizes multi-scale multi-frequency progressive focusing type monitoring, achieves the monitoring and early warning of the whole process from the initiation of impact danger to the occurrence of rock burst, and improves the accuracy and the timeliness of the early warning.
Description
Technical Field
The invention relates to the technical field of space-time monitoring and early warning of rock burst, in particular to a full-danger-period space-time comprehensive early warning method of rock burst.
Background
Rock burst is a typical dynamic disaster of coal mines, has strong destructiveness, often causes serious casualties and property loss, and seriously limits the safe and efficient production of the coal mines.
In recent years, many advances have been made in rock burst monitoring and early warning technology, and monitoring and early warning methods based on monitoring means such as electromagnetic radiation, earthquake sound and microseismic effect are diversified and have better application effect.
Research shows that the electromagnetic radiation intensity can reflect the local stress concentration condition, the earthquake sound monitoring system can monitor the coal rock high-frequency low-energy micro-fracture caused by the local stress concentration, and the micro-seismic monitoring system can monitor the low-frequency high-energy large-fracture and rock burst formed by the coal rock micro-fracture connection and penetration in a regional large-scale mode. Due to the difference of the monitoring scale range and the frequency of each monitoring system, partial information can be leaked out in the traditional method for monitoring and early warning by adopting a single monitoring system, and the accuracy and the timeliness cannot meet the requirements of the coal mine safety production in the new era.
Disclosure of Invention
The invention provides a time-space comprehensive early warning method for a total dangerous period of rock burst, which aims to solve the technical problems that partial information can be leaked out and the accuracy and the timeliness cannot meet the requirements of coal mine safety production in a new era by adopting a traditional method for monitoring and early warning by adopting a single monitoring system aiming at the time-space monitoring and early warning of rock burst.
In order to solve the technical problems, the invention provides the following technical scheme:
a comprehensive early warning method for rock burst in a full-dangerous period space-time mode comprises the following steps:
installing a micro-seismic monitoring system in a mine to be pre-warned so as to determine a local impact dangerous area from the full mine scale;
arranging an electromagnetic radiation monitoring system in the local impact dangerous area to detect a stress concentration area in real time;
arranging a ground sound monitoring system in the stress concentration area;
monitoring the whole process from the initiation of impact danger to the occurrence of rock burst of a mine to be pre-warned by combining an electromagnetic radiation monitoring system and a ground sound monitoring system;
based on the monitoring results of the electromagnetic radiation monitoring system, the ground sound monitoring system and the microseismic monitoring system, the comprehensive time-space early warning of the full dangerous period of the rock burst, which is formed by stress concentration, micro-fracture generation and micro-fracture connection and communication, is carried out in the whole process from large-scale fracture to the occurrence of the rock burst, is carried out by combining preset time-space early warning indexes.
Wherein, be waiting that early warning mine installation microseism monitoring system to follow full mine size and confirm local impact danger area, include:
installing a micro-seismic monitoring system in a mine to be pre-warned;
the method comprises the steps that data acquisition of three-dimensional surrounding of a mining working face and surrounding rocks is achieved through a micro-seismic monitoring system, data acquired by the micro-seismic monitoring system are mined, and impact danger degrees of impact dangerous areas and various dangerous areas are determined;
and taking the area with the impact risk degree exceeding a preset risk threshold value as the local impact risk area.
The data collected by the microseismic monitoring system comprises microseismic event space coordinates and microseismic event energy;
the determining of impact hazard zones and impact hazard levels of the hazard zones comprises:
determining impact dangerous areas according to the spatial distribution rule of the microseismic events in the mining process, and determining the impact dangerous degree of each impact dangerous area according to the microseismic event energy distributed at different spatial positions.
Wherein the collection frequency range of the electromagnetic radiation monitoring system is 1 kHz-500 kHz;
the electromagnetic radiation monitoring system is arranged in the local impact dangerous area and comprises:
and arranging an electromagnetic radiation monitoring system sensor at every 10m of the local impact danger area, so that the electromagnetic radiation monitoring system sensor covers the area with the impact danger exceeding a preset danger threshold value.
Wherein, the ground sound monitoring system is arranged in the stress concentration area, and comprises:
and arranging a geophone monitoring system sensor at intervals of 30m in the stress concentration area, so that the geophone monitoring system sensor covers the stress concentration area.
Wherein, through electromagnetic radiation monitoring system and earthquake sound monitoring system, jointly microseism monitoring system treats that early warning mine takes place the overall process monitoring from assaulting dangerous bud to rock burst, includes:
monitoring a high-frequency low-energy micro-fracture event with energy less than 100J and frequency range of 300-2000Hz by the ground sound monitoring system to perform local small-scale monitoring;
and monitoring low-frequency high-energy large-fracture events with energy of more than 100J and frequency range of 0-150Hz by the microseismic monitoring system so as to perform regional large-scale monitoring.
The time-space early warning index comprises a time sequence early warning index and a space early warning index;
the time sequence early warning index comprises: electromagnetic radiation intensity, a ground sound energy deviation value, a ground sound energy deviation high value total and microseismic day maximum energy; the spatial early warning indicator comprises an energy density index.
Wherein, based on electromagnetic radiation monitoring system, ground sound monitoring system and microseism monitoring system's monitoring result, combine preset space-time early warning index, carry out from stress concentration, the production of micro fracture, micro fracture link up and form the full dangerous period space-time comprehensive early warning of rock burst of the overall process of large-scale fracture to rock burst emergence, include:
if the electromagnetic radiation monitoring data of the current area exceeds a preset electromagnetic radiation critical value, an early warning is sent out to remind that the abnormal situation of the ground sound monitoring data of the current area needs to be closely concerned, the expansion situation of microcracks is judged, the danger level is improved, meanwhile, the real-time attention to the evolution rule of the space-time early warning index is reminded, if the change rate of the time sequence early warning index exceeds a preset change rate threshold value, the space early warning index exceeds a preset energy density index critical value, the large fracture starts to occur, the possibility of the future occurrence of rock burst danger is high, and at the moment, targeted pressure relief and anti-impact measures need to be taken in time according to the space early warning result.
The technical scheme provided by the invention has the beneficial effects that at least:
the method comprises the steps of determining a local impact dangerous area from the full mine scale through a microseism monitoring system, then arranging an electromagnetic radiation monitoring system in the local impact dangerous area to detect a stress concentration area in real time, guiding the arrangement of a ground sound monitoring system in the stress concentration area to monitor a coal rock body high-frequency low-energy micro-fracture event caused by stress concentration in real time, giving an early warning when a monitoring index exceeds a critical value to remind monitoring personnel to pay attention to a microseism early warning index space-time evolution rule, improving the possibility of a low-frequency high-energy large-fracture event or rock burst, and taking rock burst prevention measures according to the microseism early warning index evolution rule in time. Therefore, based on the unique early warning principle and the unique advantages of each early warning system, multi-scale multi-frequency progressive focusing type monitoring is realized, the monitoring and early warning in the whole process from the initiation of impact danger to the occurrence of rock burst are achieved, and the accuracy and the timeliness of the early warning are improved.
Drawings
In order to more clearly illustrate the technical solutions in the embodiments of the present invention, the drawings needed to be used in the description of the embodiments will be briefly introduced below, and it is obvious that the drawings in the following description are only some embodiments of the present invention, and it is obvious for those skilled in the art to obtain other drawings based on these drawings without creative efforts.
FIG. 1 is a flow chart of a comprehensive pre-warning method for rock burst in a total dangerous period according to an embodiment of the present invention;
FIG. 2 is a schematic diagram of the spatial distribution of microseismic events provided by an embodiment of the present invention;
FIG. 3 is a time sequence variation graph of the time sequence of the early warning indicator of the earthquake sound and the microseismic time sequence provided by the embodiment of the invention;
fig. 4 is a schematic diagram of an evolution rule of a microseismic spatial early warning index provided by an embodiment of the present invention.
Detailed Description
In order to make the objects, technical solutions and advantages of the present invention more apparent, embodiments of the present invention will be described in detail with reference to the accompanying drawings.
Aiming at the technical problems that partial information can be leaked out and the accuracy and the timeliness cannot meet the requirements of coal mine safety production in the new era by adopting the traditional method for monitoring and early warning by adopting a single monitoring system, the embodiment integrates the monitoring characteristics of electromagnetic radiation, a ground sound monitoring system and a microseismic monitoring system, provides the method for comprehensively early warning the whole dangerous period of the rock burst, realizes the step-by-step progressive focusing of three monitoring methods, performs multi-frequency wide-area whole dangerous period comprehensive monitoring on the rock burst, realizes the multi-scale multi-frequency progressive focusing type comprehensive early warning of the whole dangerous period of the rock burst from large-scale fracture to the whole process of the rock burst from stress concentration, micro-fracture generation and micro-fracture connection and communication, greatly improves the monitoring and early warning accuracy and the timeliness, is convenient for guiding the accurate implementation of pressure relief engineering, and is particularly suitable for frequently performing the impact disaster, A rock burst mine with complicated disaster causing factors.
As shown in fig. 1, the comprehensive pre-warning method for rock burst in a full-dangerous period comprises the following steps:
s1, installing a microseismic monitoring system in a mine to be pre-warned (a mine with rock burst danger) to determine a local impact dangerous area from the full mine scale;
specifically, in this embodiment, the implementation process of S1 is as follows:
installing a micro-seismic monitoring system in a mine to be pre-warned (a mine with rock burst danger); the method comprises the following steps of realizing data acquisition of three-dimensional surrounding of a mining working face and surrounding rocks through a micro-seismic monitoring system sensor, mining data acquired by a micro-seismic monitoring system, and determining impact dangerous areas and dangerous degrees of all areas; and taking the area with the risk degree exceeding a preset risk threshold as a local impact risk area. The data collected by the microseismic monitoring system comprises microseismic event space coordinates and microseismic event energy; accordingly, determining impact hazard zones and impact hazard levels for each hazard zone includes: determining impact dangerous areas according to the spatial distribution rule of the microseismic events in the mining process, and determining the dangerous degree of each area according to the microseismic event energy distributed at different spatial positions.
S2, arranging an electromagnetic radiation monitoring system in the local impact dangerous area to detect a stress concentration area in real time;
specifically, in this embodiment, the collection frequency range of the electromagnetic radiation monitoring system is 1 to 500kHz, and in S2, one electromagnetic radiation monitoring system sensor is arranged every 10m in an area with a high local impact risk, and the electromagnetic radiation monitoring system sensor covers the area with the high impact risk to detect the local stress concentration degree.
S3, arranging a ground sound monitoring system in the stress concentration area;
specifically, in the present embodiment, the geophone in the stress concentration area is arranged every 30m, and the geophone covers the stress concentration area for local small-scale monitoring.
S4, monitoring the whole process from the initiation of the impact danger to the occurrence of the rock burst of the mine to be pre-warned through the electromagnetic radiation monitoring system and the earthquake sound monitoring system in combination with the microseismic monitoring system;
specifically, in this embodiment, in step S4, the electromagnetic radiation monitoring system and the geophone monitoring system are combined to perform multisystem multi-scale multi-frequency progressive focusing type monitoring of the whole risk cycle of rock burst (from the initiation of rock burst to the whole process of rock burst generation); the method comprises the following steps: the method comprises the steps of monitoring a high-frequency low-energy micro-fracture event with energy less than 100J and a frequency range of 300-2000Hz by a ground sound monitoring system arranged in a stress concentration area, carrying out local small-scale monitoring, monitoring a low-frequency high-energy large-fracture event with energy more than 100J and a frequency range of 0-150Hz by a micro-seismic monitoring system, and carrying out regional large-scale monitoring.
And S5, performing full-risk period space-time comprehensive early warning of rock burst from stress concentration, micro-fracture generation and micro-fracture connection through to form large-scale fracture until the whole process of the rock burst generation based on the monitoring results of the electromagnetic radiation monitoring system, the ground sound monitoring system and the micro-seismic monitoring system and by combining preset space-time early warning indexes.
In particular, in the present implementationIn the example, the time-space early warning index comprises a time sequence early warning index and a space early warning index; wherein, the time sequence early warning index includes: intensity of electromagnetic radiation EeLand sound energy deviation value DATotal high value D of earth sound energy deviationNMaximum energy of microseismic day EmaxThe spatial early warning index is an energy density index Me。
The process of realizing the comprehensive early warning of the rock burst in the whole dangerous period space-time at S5 is as follows:
if the electromagnetic radiation monitoring data of the current area exceeds a preset electromagnetic radiation critical value, attention should be paid to the abnormal situation of the ground sound monitoring data of the current area closely, the expansion situation of microcracks is judged, the danger level is improved, meanwhile, attention is reminded to the evolution rule of a time-space early warning index in real time, if the time-sequence early warning index is subjected to abnormal change of rapid rising and rapid falling, and the space early warning index exceeds a preset energy density index critical value, large breakage is indicated to begin to occur, the possibility of the future occurrence of rock burst danger is high, and targeted pressure relief and anti-impact measures should be taken timely according to the space early warning result. It should be noted that the system critical values and the abnormal trend of the early warning index may be determined according to the actual conditions of the mines, which is not limited in this embodiment.
The following is a further description of the implementation and effect of the method of the present embodiment with specific application examples.
In this embodiment, microseismic and earthquake sound monitoring data of 2016, 12 and 8 days of a working surface of a wudong coal mine are used as original data, and the method of the present invention is used for early warning index mining to determine the possibility of occurrence of rock burst in an impact dangerous area and in the next few days, and the implementation process is as follows:
step 1, installing a micro-seismic monitoring system on a working face of a Wudong coal mine with rock burst danger, utilizing a micro-seismic monitoring system sensor to realize data acquisition of three-dimensional surrounding of an exploitation working face and surrounding rocks, excavating space coordinates and energy parameters of micro-seismic events acquired by the micro-seismic monitoring system, determining an impact danger area according to a micro-seismic event space distribution rule in an exploitation process, and determining the danger degree of each area according to micro-seismic event energy distributed at different space positions as shown in figure 2.
And 2, arranging a ground sound monitoring system in a stress concentration area with higher impact risk, carrying out multi-system multi-scale multi-frequency progressive focusing type total-risk period monitoring on the rock burst by combining the ground sound monitoring system with the microseismic monitoring system, wherein the ground sound monitoring system arranged in the stress concentration area is used for monitoring a high-frequency low-energy micro-fracture event with the energy of less than 100J and the frequency range of 300-plus-2000 Hz, the ground sound monitoring system in the stress concentration area is provided with a sensor every 30m, and the sensor of the ground sound monitoring system covers the stress concentration area to carry out local small-scale monitoring. The microseism monitoring system is used for monitoring low-frequency high-energy large-fracture events with energy larger than 100J and frequency range of 0-150Hz, performing regional large-scale monitoring and realizing the whole process from impact danger germination to rock burst occurrence.
Step 3, selecting energy parameters collected by the ground sound monitoring system, and calculating a time sequence early warning index ground sound energy deviation value DA(t)，DAThe value of (t) is calculated by the following formula:
wherein T represents the average value of the earth sound energy
The time interval is calculated, in this case T24 hours, EA(t) is a weighted average of the earth sound energy from 10 minutes before t to t, and the calculation result is shown in FIG. 3; calculating the total number D of high values of daily and terrestrial sound energy deviationN，DNThe value of (d) is calculated by:
wherein m is the total number of the earth sound energy deviation values calculated in 24 hours,
in the formula, DAiRepresents the ith energy deviation value, N, calculated over 24 hoursiIndicating the judgment result corresponding to the ith energy deviation value of the current day, and C indicates the energy deviationThe threshold value of the value is an average value of absolute values of historical energy deviation values of the monitoring working surface, C is 13 in the embodiment, and D isNThe calculation results of (a) are shown in fig. 3; calculating the maximum energy E of the microseismic daymax，EmaxCalculated from the following formula: emax＝max{EiIn which EiThe calculated results are shown in FIG. 3 for the energy of the ith microseismic event collected over 24 hours; calculating energy density index M of space early warning indexe，MeCalculated from the following formula:
wherein M isejEnergy density index, E, representing the jth statistical regioniRepresenting the energy of the ith microseismic event belonging to the jth statistical region; s represents the area of the jth statistical region, and the calculation result is shown in fig. 4.
The time sequence evolution rule of the earthquake sound and microseismic time sequence early warning index is shown in figure 3, the microcrack of the rock body under the action of high stress starts to be generated 2 days before the impact earth pressure occurs, the earthquake sound monitoring system realizes the monitoring of the high-frequency low-energy microcracking earthquake sound event, the earthquake sound early warning index is abnormal, DN>And 20, exceeding the early warning critical value, and improving the danger level. Meanwhile, reminding real-time attention to the evolution law of the microearthquake time-space early warning index before and after the date, as shown in fig. 3, wherein micro cracks begin to expand to form large cracks 5 days before the occurrence of the impact ground pressure, a microearthquake monitoring system monitors that the high-energy low-frequency micro crack events are abnormal, the daily maximum energy of the time sequence early warning index microearthquake rapidly rises and rapidly falls, the possibility of the future occurrence of the rock burst danger is very high, the calculated microearthquake space early warning index energy density index is shown in fig. 4, and the high-energy density index area in front of the working face is subjected to targeted pressure relief, and nearby people are evacuated in time.
Finally, rock burst occurs in the high energy density index area predicted in the previous period of 2016, 11, 24 and 24, so that serious damage is caused, and the accuracy of the prediction result is verified. After the rock mass is impacted, the rock mass is damaged and influenced by the impact, the micro-fracture is less, the major fracture is taken as the main fracture, and the micro-fracture is monitored by micro-shock.
In summary, the invention determines a local impact dangerous area from the whole mine scale through a microseismic monitoring system, then arranges an electromagnetic radiation monitoring system in the local impact dangerous area, detects a stress concentration area in real time, guides the arrangement of a ground sound monitoring system in the stress concentration area, monitors high-frequency low-energy micro-cracking events of coal rock mass caused by stress concentration in real time, carries out early warning when a monitoring index exceeds a critical value, reminds monitoring personnel to strengthen the attention to the space-time evolution rule of a microseismic early warning index, improves the possibility of the occurrence of low-frequency high-energy large-cracking events or rock burst, and takes rock burst prevention measures in time according to the microseismic early warning index evolution rule. Therefore, based on the unique early warning principle and the unique advantages of each early warning system, multi-scale multi-frequency progressive focusing type monitoring is realized, the monitoring and early warning in the whole process from the initiation of impact danger to the occurrence of rock burst are achieved, and the accuracy and the timeliness of the early warning are improved.
Further, it should be noted that, in this document, the terms "comprises," "comprising," or any other variation thereof, are intended to cover a non-exclusive inclusion, such that a process, method, article, or terminal apparatus that comprises a list of elements does not include only those elements but may include other elements not expressly listed or inherent to such process, method, article, or terminal apparatus. Without further limitation, an element defined by the phrase "comprising an … …" does not exclude the presence of other like elements in a process, method, article, or terminal that comprises the element.
Finally, it should be noted that while the above describes a preferred embodiment of the invention, it will be appreciated by those skilled in the art that, once the basic inventive concepts have been learned, numerous changes and modifications may be made without departing from the principles of the invention, which shall be deemed to be within the scope of the invention. Therefore, it is intended that the appended claims be interpreted as including preferred embodiments and all such alterations and modifications as fall within the scope of the embodiments of the invention.
Claims (8)
1. A comprehensive early warning method for rock burst in a full-dangerous period space-time mode is characterized by comprising the following steps:
installing a micro-seismic monitoring system in a mine to be pre-warned so as to determine a local impact dangerous area from the full mine scale;
arranging an electromagnetic radiation monitoring system in the local impact dangerous area to detect a stress concentration area in real time;
arranging a ground sound monitoring system in the stress concentration area;
monitoring the whole process from the initiation of impact danger to the occurrence of rock burst of a mine to be pre-warned by combining an electromagnetic radiation monitoring system and a ground sound monitoring system;
based on the monitoring results of the electromagnetic radiation monitoring system, the ground sound monitoring system and the microseismic monitoring system, the comprehensive time-space early warning of the full dangerous period of the rock burst, which is formed by stress concentration, micro-fracture generation and micro-fracture connection and communication, is carried out in the whole process from large-scale fracture to the occurrence of the rock burst, is carried out by combining preset time-space early warning indexes.
2. The comprehensive pre-warning method for rock burst in a full-danger period space-time mode as claimed in claim 1, wherein the step of installing a microseismic monitoring system in a mine to be pre-warned to determine a local impact danger area from the full mine scale comprises the following steps:
installing a micro-seismic monitoring system in a mine to be pre-warned;
the method comprises the steps that data acquisition of three-dimensional surrounding of a mining working face and surrounding rocks is achieved through a micro-seismic monitoring system, data acquired by the micro-seismic monitoring system are mined, and impact danger degrees of impact dangerous areas and various dangerous areas are determined;
and taking the area with the impact risk degree exceeding a preset risk threshold value as the local impact risk area.
3. The method for comprehensive early warning of the total dangerous period space-time of rock burst according to claim 2, wherein the data collected by the microseismic monitoring system comprises the space coordinates of the microseismic event and the energy of the microseismic event;
the determining of impact hazard zones and impact hazard levels of the hazard zones comprises:
determining impact dangerous areas according to the spatial distribution rule of the microseismic events in the mining process, and determining the impact dangerous degree of each impact dangerous area according to the microseismic event energy distributed at different spatial positions.
4. The method for comprehensive early warning of the total dangerous period space-time of rock burst according to claim 1, wherein the collection frequency range of the electromagnetic radiation monitoring system is 1kHz to 500 kHz;
the electromagnetic radiation monitoring system is arranged in the local impact dangerous area and comprises:
and arranging an electromagnetic radiation monitoring system sensor at every 10m of the local impact danger area, so that the electromagnetic radiation monitoring system sensor covers the area with the impact danger exceeding a preset danger threshold value.
5. The method for comprehensive early warning of rock burst in a total dangerous period space-time according to claim 1, wherein the arrangement of the ground sound monitoring system in the stress concentration area comprises:
and arranging a geophone monitoring system sensor at intervals of 30m in the stress concentration area, so that the geophone monitoring system sensor covers the stress concentration area.
6. The method for comprehensive early warning of rock burst in a total dangerous period space-time according to claim 5, wherein the monitoring of the whole process from the initiation of rock burst to the occurrence of rock burst in the mine to be early warned is performed by the electromagnetic radiation monitoring system and the earthquake sound monitoring system in combination with the microseismic monitoring system, and comprises:
monitoring a high-frequency low-energy micro-fracture event with energy less than 100J and frequency range of 300-2000Hz by the ground sound monitoring system to perform local small-scale monitoring;
and monitoring low-frequency high-energy large-fracture events with energy of more than 100J and frequency range of 0-150Hz by the microseismic monitoring system so as to perform regional large-scale monitoring.
7. The comprehensive pre-warning method for rock burst in a total dangerous period space-time according to claim 1, wherein the pre-warning indicators include a time sequence pre-warning indicator and a space pre-warning indicator;
the time sequence early warning index comprises: electromagnetic radiation intensity, a ground sound energy deviation value, a ground sound energy deviation high value total and microseismic day maximum energy; the spatial early warning indicator comprises an energy density index.
8. The comprehensive early warning method for the full-dangerous-period space-time of rock burst as claimed in claim 7, wherein based on the monitoring results of the electromagnetic radiation monitoring system, the earth sound monitoring system and the microseismic monitoring system, the comprehensive early warning method for the full-dangerous-period space-time of rock burst, which is based on the whole process from stress concentration, micro-fracture generation and micro-fracture connection and communication to form large-scale fracture until the full process of the rock burst, is carried out by combining preset space-time early warning indexes, and comprises the following steps:
if the electromagnetic radiation monitoring data of the current area exceeds a preset electromagnetic radiation critical value, an early warning is sent out to remind that the abnormal situation of the ground sound monitoring data of the current area needs to be closely concerned, the expansion situation of microcracks is judged, the danger level is improved, meanwhile, the real-time attention to the evolution rule of the space-time early warning index is reminded, if the change rate of the time sequence early warning index exceeds a preset change rate threshold value, the space early warning index exceeds a preset energy density index critical value, the large fracture starts to occur, the possibility of the future occurrence of rock burst danger is high, and at the moment, targeted pressure relief and anti-impact measures need to be taken in time according to the space early warning result.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202110610766.1A CN113266421B (en) | 2021-06-01 | 2021-06-01 | Comprehensive early warning method for full-dangerous period time and space of rock burst |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202110610766.1A CN113266421B (en) | 2021-06-01 | 2021-06-01 | Comprehensive early warning method for full-dangerous period time and space of rock burst |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN113266421A true CN113266421A (en) | 2021-08-17 |
| CN113266421B CN113266421B (en) | 2022-05-03 |
Family
ID=77233986
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202110610766.1A Active CN113266421B (en) | 2021-06-01 | 2021-06-01 | Comprehensive early warning method for full-dangerous period time and space of rock burst |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN113266421B (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN114294062A (en) * | 2021-12-29 | 2022-04-08 | 北京科技大学 | Time-space dynamic comprehensive early warning method for rock burst |
Citations (9)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| RU2433425C2 (en) * | 2010-01-29 | 2011-11-10 | Юрий Николаевич Жуков | Method for seismic prospecting hydrocarbons and method of determining attitude of producing formations on hydrocarbons and seismic station for realising said method |
| CN102628373A (en) * | 2012-04-27 | 2012-08-08 | 天地科技股份有限公司 | Impact ground pressure split source comprehensive early-warning method of coal mine |
| CN102644482A (en) * | 2012-05-18 | 2012-08-22 | 河南大有能源股份有限公司 | Rock burst predicting and warning method |
| CN105484802A (en) * | 2016-01-15 | 2016-04-13 | 西安科技大学 | Coal mine rock burst united monitoring and early warning system and monitoring and early warning method thereof |
| CN205743991U (en) * | 2016-01-15 | 2016-11-30 | 神华集团有限责任公司 | A kind of coal mine rock burst combined monitoring early warning system |
| CN106443761A (en) * | 2016-10-09 | 2017-02-22 | 华北科技学院 | Full-frequency band and wide-frequency domain shake monitoring system for mine earthquakes and rock bursts |
| CN109578075A (en) * | 2018-11-15 | 2019-04-05 | 国家能源投资集团有限责任公司 | The micro seismic monitoring method for early warning of bump danger, device and system |
| CN110552740A (en) * | 2019-08-30 | 2019-12-10 | 北京科技大学 | local progressive focusing type detection early warning method for coal rock dynamic disaster dangerous area |
| CN111648826A (en) * | 2020-05-26 | 2020-09-11 | 陕西彬长孟村矿业有限公司 | Coal mine rock burst prediction early warning system and method |
-
2021
- 2021-06-01 CN CN202110610766.1A patent/CN113266421B/en active Active
Patent Citations (9)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| RU2433425C2 (en) * | 2010-01-29 | 2011-11-10 | Юрий Николаевич Жуков | Method for seismic prospecting hydrocarbons and method of determining attitude of producing formations on hydrocarbons and seismic station for realising said method |
| CN102628373A (en) * | 2012-04-27 | 2012-08-08 | 天地科技股份有限公司 | Impact ground pressure split source comprehensive early-warning method of coal mine |
| CN102644482A (en) * | 2012-05-18 | 2012-08-22 | 河南大有能源股份有限公司 | Rock burst predicting and warning method |
| CN105484802A (en) * | 2016-01-15 | 2016-04-13 | 西安科技大学 | Coal mine rock burst united monitoring and early warning system and monitoring and early warning method thereof |
| CN205743991U (en) * | 2016-01-15 | 2016-11-30 | 神华集团有限责任公司 | A kind of coal mine rock burst combined monitoring early warning system |
| CN106443761A (en) * | 2016-10-09 | 2017-02-22 | 华北科技学院 | Full-frequency band and wide-frequency domain shake monitoring system for mine earthquakes and rock bursts |
| CN109578075A (en) * | 2018-11-15 | 2019-04-05 | 国家能源投资集团有限责任公司 | The micro seismic monitoring method for early warning of bump danger, device and system |
| CN110552740A (en) * | 2019-08-30 | 2019-12-10 | 北京科技大学 | local progressive focusing type detection early warning method for coal rock dynamic disaster dangerous area |
| CN111648826A (en) * | 2020-05-26 | 2020-09-11 | 陕西彬长孟村矿业有限公司 | Coal mine rock burst prediction early warning system and method |
Non-Patent Citations (1)
| Title |
|---|
| 何学秋等: "煤岩冲击动力灾害连续监测预警理论与技术", 《煤炭学报》 * |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN114294062A (en) * | 2021-12-29 | 2022-04-08 | 北京科技大学 | Time-space dynamic comprehensive early warning method for rock burst |
Also Published As
| Publication number | Publication date |
|---|---|
| CN113266421B (en) | 2022-05-03 |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| Feng et al. | Fractal behaviour of the microseismic energy associated with immediate rockbursts in deep, hard rock tunnels | |
| Wang et al. | Preliminary engineering application of microseismic monitoring technique to rockburst prediction in tunneling of Jinping II project | |
| CN101787897B (en) | System and method for predicting coal and gas outburst risk of mine in real time | |
| CN111648826B (en) | Coal mine rock burst prediction early warning system and method | |
| CN109595036B (en) | Early warning method for mine ground pressure disaster | |
| CN108798785B (en) | Coal mine rock burst prediction and early warning method | |
| CN105257339A (en) | Multi-parameter integrated monitoring and early-warning method for excavation working face | |
| CN103291364A (en) | Microseismic multidimensional information comprehensive time sequence early warning method for rock burst | |
| CN101582191B (en) | Method for realizing micro-seismic monitoring and real-time early warning to mine power disaster | |
| CN106054243A (en) | Rockburst multi-index prediction method based on micro-seismic monitoring | |
| CN114087021B (en) | Rock burst multi-parameter dynamic trend early warning method | |
| CN103244187B (en) | Coal and gas prominent breeds evolution early warning comprehensive index system | |
| CN111915865A (en) | Coal mine composite geological disaster early warning method based on mining seismic source parameters | |
| CN104834012B (en) | Electromagnetic radiation monitoring early warning method of mine roof water inrush | |
| CN111042866B (en) | Multi-physical-field cooperative water inrush monitoring method | |
| CN107725108A (en) | A kind of rock side slope deformation method for early warning based on microseism apparent stress | |
| CN203838856U (en) | Railway roadbed apparatus monitoring and early warning system | |
| CN110307038B (en) | Full-digital comprehensive monitoring and early warning system and method for mine power disasters | |
| CN113266421B (en) | Comprehensive early warning method for full-dangerous period time and space of rock burst | |
| CN112324506B (en) | Dynamic early warning method for preventing rock burst of coal mine based on microseism | |
| CN109578075B (en) | Microseismic monitoring and early warning method, device and system for rock burst danger | |
| CN104018790A (en) | Roadway rock burst early-warning method based on rock noise monitoring | |
| CN114294062B (en) | Time-space dynamic comprehensive early warning method for rock burst | |
| CN114718653A (en) | Mine dynamic disaster real-time monitoring and early warning method based on three comprehensive parameters | |
| CN116044501A (en) | Advanced geological forecast dynamic monitoring and early warning system and method |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| PB01 | Publication | ||
| PB01 | Publication | ||
| SE01 | Entry into force of request for substantive examination | ||
| SE01 | Entry into force of request for substantive examination | ||
| GR01 | Patent grant | ||
| GR01 | Patent grant |