CN118257630A - Intelligent monitoring method for surrounding rock of coal mine shaft - Google Patents
Intelligent monitoring method for surrounding rock of coal mine shaft Download PDFInfo
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- 238000012544 monitoring process Methods 0.000 title claims abstract description 137
- 239000011435 rock Substances 0.000 title claims abstract description 78
- 238000000034 method Methods 0.000 title claims abstract description 57
- 239000003245 coal Substances 0.000 title claims abstract description 18
- 230000002159 abnormal effect Effects 0.000 claims abstract description 31
- 238000011156 evaluation Methods 0.000 claims description 49
- 238000010586 diagram Methods 0.000 claims description 3
- 230000005856 abnormality Effects 0.000 description 1
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- 230000009286 beneficial effect Effects 0.000 description 1
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- G—PHYSICS
- G01—MEASURING; TESTING
- G01D—MEASURING NOT SPECIALLY ADAPTED FOR A SPECIFIC VARIABLE; ARRANGEMENTS FOR MEASURING TWO OR MORE VARIABLES NOT COVERED IN A SINGLE OTHER SUBCLASS; TARIFF METERING APPARATUS; MEASURING OR TESTING NOT OTHERWISE PROVIDED FOR
- G01D21/00—Measuring or testing not otherwise provided for
- G01D21/02—Measuring two or more variables by means not covered by a single other subclass
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- 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
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Abstract
An intelligent monitoring method for surrounding rock of a coal mine shaft relates to the technical field of data monitoring, and comprises the following steps: obtaining a wall area of a surrounding rock of a shaft, dividing the wall area to obtain a plurality of wall sub-areas, obtaining a wet area and a change area of the surrounding rock of the shaft according to humidity data of the wall sub-areas, dividing the surrounding rock of the shaft into different stress layers according to stress data of the wall sub-areas, obtaining vibration change amplitude and change frequency of each change area before and after the change in the different stress layers, dividing the change frequency into different change frequency intervals, and comparing the vibration change amplitude of the change areas belonging to the same stress layer and the same change frequency interval to obtain corresponding abnormal amplitude areas; by the technical scheme, the influence of humidity on the vibration of the surrounding rock of the shaft can be reflected, and the flexibility of data monitoring is improved.
Description
Technical Field
The invention relates to the technical field of data monitoring, in particular to an intelligent monitoring method for surrounding rock of a coal mine shaft.
Background
The method is characterized in that the data monitoring is one of important measures for ensuring the safe operation of the coal mine, various sensors are arranged around the surrounding rock of the coal mine shaft, the data acquired by the sensors are processed and analyzed in real time, an intelligent early warning system is established based on the data analysis result, when abnormal change of the surrounding rock is monitored, an alarm is given out in time, and corresponding measures are taken, so that a mine manager can be helped to find the abnormal change of the surrounding rock in time, the occurrence of coal mine accidents is prevented, and the safety of miners is ensured;
In the prior art, how to realize the alarm after the data are collected is mostly based on a simple range comparison method, when the data exceed a certain range, the abnormality is judged, the basis of the judgment or the comparison range of the prior art is mostly carried out on the whole surrounding rock wall surface of a shaft, the method ignores the condition that different surrounding rock conditions of the shaft are formed in the daily accumulation due to the difference of underground water levels and the difference of stress of different areas, and the similar or similar areas are put together for comparison under the condition that the comparison range is limited, but the method for solving the problem is lacking in the prior art.
Disclosure of Invention
The invention aims to provide an intelligent monitoring method for surrounding rock of a coal mine shaft.
The aim of the invention can be achieved by the following technical scheme: an intelligent monitoring method for surrounding rock of a coal mine shaft comprises the following steps:
Step S1: acquiring size information of surrounding rock of a shaft, acquiring a wall area of the surrounding rock of the shaft according to the acquired size information, and dividing the acquired wall area to acquire a plurality of wall sub-areas;
Step S2: setting a monitoring period, acquiring humidity data of each wall sub-area, acquiring a wet area of the surrounding rock of the shaft according to the humidity data of the same monitoring period, and acquiring a change area of the surrounding rock of the shaft according to the wet areas of different monitoring periods;
Step S3: monitoring stress data of each wall sub-area, dividing the surrounding rock of the shaft into different stress layers according to the monitored stress data, and monitoring vibration amplitude of each wall sub-area to obtain vibration variation amplitude of each variation area in the different stress layers before and after variation;
Step S4: setting an evaluation period, obtaining the change frequency of each change region, dividing the obtained change frequency into different change frequency intervals, comparing the vibration change amplitudes of the change regions belonging to the same stress layer and the same change frequency interval to obtain corresponding abnormal amplitude regions, generating an abnormal amplitude signal and feeding back the abnormal amplitude signal.
Further, acquiring size information of the surrounding rock of the shaft, obtaining a wall area of the surrounding rock of the shaft according to the acquired size information, and dividing the obtained wall area to obtain a plurality of wall sub-areas, wherein the process comprises the following steps:
Setting an acquisition unit, and acquiring size information of the surrounding rock of the shaft through the acquisition unit, wherein the size information refers to various data capable of describing the size of the surrounding rock of the shaft, and the data comprise, but are not limited to, the vertical distance, the inclination angle, the wall thickness of the shaft, the diameter of a wellhead, the height of a derrick, the inner diameter and the outer diameter of the shaft;
Converting the inner wall surface of the surrounding rock of the shaft into a corresponding two-dimensional plane according to the acquired size information, enabling the obtained two-dimensional plane to be approximately rectangular, marking the obtained two-dimensional plane as a wall surface area of the surrounding rock of the shaft, dividing the obtained wall surface area into a plurality of sub-areas by adopting an equal division method, and marking the sub-areas as wall surface sub-areas.
Further, the process of setting a monitoring period and obtaining humidity data of each wall sub-area and obtaining the wet area of the surrounding rock of the shaft according to the humidity data of the same monitoring period comprises the following steps:
Respectively setting a humidity monitoring unit in the center of the obtained wall sub-area, setting a monitoring period, and acquiring the humidity data of each wall sub-area once through the humidity monitoring unit when the monitoring period is reached, wherein the humidity data comprises the current humidity of the wall sub-area and the corresponding acquisition time;
The humidity data of all the wall subregions acquired in the same monitoring period are brought into the humidity data set of the monitoring period, the humidity data sets of different monitoring periods are obtained, each humidity data set is numbered, the humidity data are respectively marked as W i, a humidity range [ W min,Wmax ] is set for the surrounding rock of a shaft, the obtained humidity data are compared with the set humidity range, the wall subregions are marked as different states according to the comparison result, the wall subregions comprise a dry state, a normal state and a wet state, if W i＜Wmin, the wall subregions are marked as the dry state, if W i＞Wmax, the wall subregions are marked as the wet state, if W min≤Wi≤Wmax, the wall subregions are marked as the normal state, and the wall subregions marked as the wet state are used as the wet regions of the surrounding rock of the shaft.
Further, the process of obtaining a change area of the surrounding rock of the shaft according to the wet areas of different monitoring periods comprises the following steps:
Marking the monitoring period with the front time in the two adjacent monitoring periods as the monitoring period before the change, and marking the monitoring period with the rear time as the monitoring period after the change;
Obtaining a pre-change wet area in a pre-change monitoring period, and simultaneously obtaining a post-change wet area in a post-change monitoring period, marking a wall sub-area which keeps a wet state unchanged in the pre-change wet area and the post-change wet area as an unchanged area, and marking other areas except the unchanged area in the pre-change wet area and the post-change wet area as changed areas of the post-change monitoring period;
the change state of each change region is obtained, and if the change region is changed from the wet state to the normal state or the dry state, the change region is marked as the dry state, and if the change region is changed from the normal state or the dry state to the wet state, the change region is marked as the wet state.
Further, the process of monitoring stress data of each wall sub-area and dividing the wellbore surrounding rock into different stress layers according to the monitored stress data comprises the following steps:
The method comprises the steps of respectively arranging a stress monitoring unit at the center of each wall sub-area, respectively monitoring stress data of each wall sub-area in real time through the stress monitoring units, setting different and continuous numerical intervals for the stress data, wherein one numerical interval corresponds to one stress layer, the numerical differences in the different numerical intervals are equal, dividing the monitored stress data into the corresponding numerical intervals, and further dividing the whole surrounding rock of the shaft into different stress layers, wherein the stress data of the wall sub-areas in the same stress layer belong to the same numerical interval.
Further, the process of monitoring the vibration amplitude of each wall sub-area to obtain the vibration variation amplitude of each variation area before and after the variation in different stress layers includes:
Respectively arranging a vibration monitoring unit in the center of each wall sub-area, respectively monitoring the vibration amplitude of each wall sub-area in real time through the vibration monitoring unit, incorporating the vibration amplitude monitored in two adjacent monitoring periods of the monitoring period before and after the change of the change area into the vibration amplitude set of the change area in the adjacent monitoring period, and constructing a vibration change line graph according to the obtained vibration amplitude set;
In the vibration change line diagram, a demarcation point of a monitoring period before change and a monitoring period after change is obtained, the mean value of the vibration amplitude before change is taken as the mean value of the vibration amplitude before change, the mean value of the vibration amplitude after change is taken as the mean value of the vibration amplitude after change, the difference value obtained by subtracting the mean value from the mean value is taken as the vibration change amplitude of the change area before and after change, and the obtained vibration change degree is bound with a stress layer to which the change area belongs.
Further, the process of setting the evaluation period and obtaining the change frequency of each change region, and dividing the obtained change frequency into different change frequency intervals includes:
Setting an evaluation period, wherein the evaluation period consists of a plurality of monitoring periods, when one evaluation period is reached, the number of times of changing the state of the change region in the evaluation period is obtained, the number of times of changing is the number of times of changing the state of the change region in the evaluation period, and the obtained ratio of the number of times of changing to the evaluation period is taken as the change frequency of the change region in the evaluation period;
Obtaining the change frequency of each change area in the same evaluation period, setting different change frequency intervals for the obtained change frequency, wherein the numerical value differences in the different change frequency intervals are equal, dividing the change frequency of each change area into corresponding change frequency intervals, and further obtaining the change frequency interval of each change area in the evaluation period.
Further, the process of comparing vibration variation amplitudes of the variation areas belonging to the same stress layer and the same variation frequency interval to obtain corresponding abnormal amplitude areas, generating abnormal amplitude signals and feeding back the abnormal amplitude signals includes:
obtaining vibration variation amplitudes of variation areas belonging to the same stress layer and the same variation frequency interval in the same evaluation period, numbering the obtained vibration variation amplitudes, obtaining an evaluation coefficient R of each variation area, setting an evaluation standard R 0, comparing the obtained evaluation coefficient with the evaluation standard, marking the obtained evaluation coefficient as normal amplitude if R is less than or equal to R 0, not performing any other operation on the variation area, marking the variation area as abnormal amplitude if R is more than R 0, marking the variation area as abnormal amplitude area, generating corresponding abnormal amplitude signals and feeding the corresponding abnormal amplitude signals back to related personnel.
Compared with the prior art, the invention has the beneficial effects that:
1. According to the method, the inner wall surface of the surrounding rock of the shaft is divided into the wall surface sub-areas, so that the accuracy of data monitoring is improved, the humidity data of each wall surface sub-area in the adjacent monitoring period is monitored, firstly, the humidity area is obtained according to the humidity data of the same monitoring period, then the change area is obtained according to the humidity data of different monitoring periods, the humidity change condition of each wall surface sub-area in different monitoring periods can be effectively reflected according to the monitored humidity data, the change frequency is obtained according to the number of state changes of the change area in a certain time, and the vibration influence of the humidity on the surrounding rock of the shaft can be reflected by combining the monitored vibration amplitude;
2. the vibration amplitude of the same wall sub-area in different states is compared, so that the vibration variation amplitude of the wall sub-area can be obtained, the vibration variation amplitude of the variation area belonging to the same stress layer and the same variation frequency interval is used as a comparison basis, the condition that the conventional comparison range is overlarge, the condition that the data monitoring lacks accuracy is avoided, the dynamic variation comparison range is obtained according to various monitoring data of different monitoring periods, and the flexibility of the data monitoring is improved.
Drawings
FIG. 1 is a flow chart of the present invention.
Detailed Description
As shown in fig. 1, the intelligent monitoring method for the surrounding rock of the coal mine shaft comprises the following steps:
Step S1: acquiring size information of surrounding rock of a shaft, acquiring a wall area of the surrounding rock of the shaft according to the acquired size information, and dividing the acquired wall area to acquire a plurality of wall sub-areas;
Step S2: setting a monitoring period, acquiring humidity data of each wall sub-area, acquiring a wet area of the surrounding rock of the shaft according to the humidity data of the same monitoring period, and acquiring a change area of the surrounding rock of the shaft according to the wet areas of different monitoring periods;
Step S3: monitoring stress data of each wall sub-area, dividing the surrounding rock of the shaft into different stress layers according to the monitored stress data, and monitoring vibration amplitude of each wall sub-area to obtain vibration variation amplitude of each variation area in the different stress layers before and after variation;
Step S4: setting an evaluation period, obtaining the change frequency of each change region, dividing the obtained change frequency into different change frequency intervals, comparing the vibration change amplitudes of the change regions belonging to the same stress layer and the same change frequency interval to obtain corresponding abnormal amplitude regions, generating an abnormal amplitude signal and feeding back the abnormal amplitude signal.
It should be further noted that, in the implementation process, the process of acquiring the size information of the surrounding rock of the shaft, obtaining the wall area of the surrounding rock of the shaft according to the acquired size information, and dividing the obtained wall area to obtain a plurality of wall sub-areas includes:
Setting an acquisition unit, and acquiring size information of the surrounding rock of the shaft through the acquisition unit, wherein the size information refers to various data capable of describing the size of the surrounding rock of the shaft, and the data comprise, but are not limited to, the vertical distance, the inclination angle, the wall thickness of the shaft, the diameter of a wellhead, the height of a derrick, the inner diameter and the outer diameter of the shaft;
Converting the inner wall surface of the surrounding rock of the shaft into a corresponding two-dimensional plane according to the acquired size information, enabling the obtained two-dimensional plane to be approximately rectangular, marking the obtained two-dimensional plane as a wall surface area of the surrounding rock of the shaft, dividing the obtained wall surface area into a plurality of sub-areas by adopting an equal division method, and marking the sub-areas as wall surface sub-areas.
It should be further noted that, in the implementation process, the process of setting a monitoring period and obtaining humidity data of each wall sub-area, and obtaining the wet area of the surrounding rock of the shaft according to the humidity data of the same monitoring period includes:
Respectively setting a humidity monitoring unit in the center of the obtained wall sub-area, setting a monitoring period, and acquiring the humidity data of each wall sub-area once through the humidity monitoring unit when the monitoring period is reached, wherein the humidity data comprises the current humidity of the wall sub-area and the corresponding acquisition time;
The humidity data of all the wall subregions collected in the same monitoring period are included in the humidity data set of the monitoring period, the humidity data sets of different monitoring periods are obtained by adopting the same method, the humidity data set of any monitoring period is taken as an example, each item of humidity data in the humidity data set is numbered and is marked as W i, wherein i=1, 2, … …, n and n are the number of the wall subregions;
Setting a humidity range [ W min,Wmax ] for the surrounding rock of the shaft, comparing the obtained humidity data with the set humidity range, marking the wall sub-area as different states including a dry state, a normal state and a wet state according to the comparison result, marking the wall sub-area as the dry state if W i＜Wmin, marking the wall sub-area as the wet state if W i＞Wmax, marking the wall sub-area as the normal state if W min≤Wi≤Wmax, and taking the wall sub-area marked as the wet state as the wet area of the surrounding rock of the shaft.
It should be further noted that, in the implementation process, the process of obtaining the change area of the surrounding rock of the shaft according to the wet areas of different monitoring periods includes:
After the wet areas of the surrounding rock of the shaft are obtained according to the humidity data of the same monitoring period, the wet areas of the surrounding rock of the shaft are further processed through the wet areas of different monitoring periods, the monitoring period with the time before the two adjacent monitoring periods is marked as the monitoring period before the change, and the monitoring period with the time after the two adjacent monitoring periods is marked as the monitoring period after the change;
Taking any two adjacent monitoring periods as an example, obtaining all the wet areas in the monitoring period before the change, namely the wet areas before the change, and simultaneously obtaining all the wet areas in the monitoring period after the change, namely the wet areas after the change, marking the wall sub-areas which keep the wet state unchanged in the wet areas before the change and the wet areas after the change as unchanged areas, and marking other areas except the unchanged areas in the wet areas as changed areas of the monitoring period after the change;
and (3) obtaining the change state of each change area, taking any change area as an example, marking the change area as a dry state if the change area is changed from a wet state to a normal state or a dry state, marking the change area as a wet state if the change area is changed from the normal state or the dry state to the wet state, and obtaining the change area of the surrounding rock of the shaft and the corresponding change state of the surrounding rock of the shaft in each monitoring period by adopting the same method.
It should be further noted that, in the implementation process, the process of monitoring stress data of each wall sub-area and dividing the surrounding rock of the well bore into different stress layers according to the monitored stress data includes:
The method comprises the steps of setting a stress monitoring unit in the center of each wall surface sub-area, respectively monitoring stress data of each wall surface sub-area in real time through the stress monitoring unit, and setting different and continuous numerical intervals for the stress data, wherein one numerical interval corresponds to one stress layer, the numerical intervals in the different numerical intervals are equal, and dividing the monitored stress data into corresponding numerical intervals to divide the whole surrounding rock of a shaft into different stress layers, wherein the stress data of the wall surface sub-areas in the same stress layer belong to the same numerical interval.
It should be further noted that, in the implementation process, the process of monitoring the vibration amplitude of each wall sub-area to obtain the vibration variation amplitude of each variation area before and after the variation in different stress layers includes:
Respectively arranging a vibration monitoring unit at the center of each wall sub-area, respectively monitoring the vibration amplitude of each wall sub-area in real time through the vibration monitoring unit, taking any change area as an example, taking the vibration amplitude monitored in two adjacent monitoring periods of the change area before and after the change into a vibration amplitude set of the change area in the adjacent monitoring period, and constructing a vibration change line graph with an abscissa as a time point and an ordinate as the vibration amplitude according to the obtained vibration amplitude set;
In the vibration change line diagram, a demarcation point of a monitoring period before change and a monitoring period after change is obtained, the mean value of the vibration amplitude before change is taken as the mean value of the vibration amplitude before change, the mean value of the vibration amplitude after change is taken as the mean value of the vibration amplitude after change, the difference value obtained by subtracting the mean value from the mean value is taken as the vibration change amplitude of the change area before and after change, and the obtained vibration change degree is bound with a stress layer to which the change area belongs.
It should be further noted that, in the implementation process, the process of setting the evaluation period and obtaining the change frequency of each change region, and dividing the obtained change frequency into different change frequency intervals includes:
Setting an evaluation period, wherein the evaluation period consists of a plurality of monitoring periods, when one evaluation period is reached, the change times of a change area in the evaluation period are obtained, the change times are the change times of the state of the change area in the evaluation period, for example, after the change area is changed from a wet state to a normal state, the state change is recorded as one change times, and the obtained ratio of the change times to the evaluation period is taken as the change frequency of the change area in the evaluation period;
The same method is adopted to obtain the change frequency of each change area in the same evaluation period, different change frequency intervals are set for the obtained change frequency, the numerical value differences in the different change frequency intervals are equal, the change frequency of each change area is divided into corresponding change frequency intervals, and then the change frequency interval of each change area in the evaluation period is obtained.
It should be further noted that, in the implementation process, the process of comparing the vibration variation amplitudes of the variation regions belonging to the same stress layer and the same variation frequency interval to obtain corresponding abnormal amplitude regions, generating an abnormal amplitude signal and feeding back includes:
Taking any evaluation period as an example, obtaining vibration variation amplitudes of variation areas belonging to the same stress layer and the same variation frequency interval in the evaluation period, numbering the obtained vibration variation amplitudes, and marking the obtained vibration variation amplitudes as P j, wherein j=1, 2, … …, m and m are the number of the vibration variation amplitudes, and obtaining an evaluation coefficient of each variation area, and marking the evaluation coefficient as R;
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Setting an evaluation standard R 0, comparing the obtained evaluation coefficient with the evaluation standard, marking the obtained evaluation coefficient as normal amplitude if R is less than or equal to R 0, not performing any other operation on the change region, marking the change region as abnormal amplitude if R is more than R 0, marking the change region as an abnormal amplitude region, generating a corresponding abnormal amplitude signal and feeding the corresponding abnormal amplitude signal back to related personnel.
The above embodiments are only for illustrating the technical method of the present invention and not for limiting the same, and it should be understood by those skilled in the art that the technical method of the present invention may be modified or substituted without departing from the spirit and scope of the technical method of the present invention.
Claims (8)
1. An intelligent monitoring method for surrounding rock of a coal mine shaft is characterized by comprising the following steps:
Step S1: acquiring size information of surrounding rock of a shaft, acquiring a wall area of the surrounding rock of the shaft according to the acquired size information, and dividing the acquired wall area to acquire a plurality of wall sub-areas;
Step S2: setting a monitoring period, acquiring humidity data of each wall sub-area, acquiring a wet area of the surrounding rock of the shaft according to the humidity data of the same monitoring period, and acquiring a change area of the surrounding rock of the shaft according to the wet areas of different monitoring periods;
Step S3: monitoring stress data of each wall sub-area, dividing the surrounding rock of the shaft into different stress layers according to the monitored stress data, and monitoring vibration amplitude of each wall sub-area to obtain vibration variation amplitude of each variation area in the different stress layers before and after variation;
Step S4: setting an evaluation period, obtaining the change frequency of each change region, dividing the obtained change frequency into different change frequency intervals, comparing the vibration change amplitudes of the change regions belonging to the same stress layer and the same change frequency interval to obtain corresponding abnormal amplitude regions, generating an abnormal amplitude signal and feeding back the abnormal amplitude signal.
2. The intelligent monitoring method for the surrounding rock of the coal mine shaft according to claim 1, wherein the steps of acquiring the size information of the surrounding rock of the shaft, obtaining the wall area of the surrounding rock of the shaft according to the acquired size information, and dividing the obtained wall area to obtain a plurality of wall sub-areas include:
And acquiring size information of the surrounding rock of the shaft, wherein the size information comprises a vertical distance, an inclination angle, a wall thickness of the shaft, a diameter of a wellhead, a height of a derrick, an inner diameter and an outer diameter of the shaft, converting an inner wall surface of the surrounding rock of the shaft into a two-dimensional wall surface area according to the acquired size information, and equally dividing the obtained wall surface area into a plurality of wall surface sub-areas.
3. The intelligent monitoring method for the surrounding rock of the shaft of the coal mine according to claim 2, wherein the process of setting a monitoring period and obtaining the humidity data of each wall sub-area and obtaining the humidity area of the surrounding rock of the shaft according to the humidity data of the same monitoring period comprises the following steps:
The method comprises the steps of respectively setting humidity monitoring units in the centers of wall sub-areas, setting monitoring periods, collecting humidity data of all the wall sub-areas once through the humidity monitoring units when one monitoring period is reached, bringing the humidity data of all the wall sub-areas in the same monitoring period into a humidity data set of the monitoring period, setting humidity ranges, comparing the humidity data with the humidity ranges, dividing the wall sub-areas into a dry state, a normal state and a wet state according to comparison results, and taking the wall sub-areas marked as the wet state as the wet areas of the surrounding rock of the shaft.
4. A method of intelligent monitoring of a coal mine shaft surrounding rock according to claim 3, wherein the step of obtaining a change area of the shaft surrounding rock according to the wet areas of different monitoring periods comprises:
The monitoring period which is in front of the time in the two adjacent monitoring periods is marked as a monitoring period before change, the monitoring period which is in back of the time is marked as a monitoring period after change, the wall surface subareas which keep the wet state unchanged in the monitoring period before change and the monitoring period after change are marked as no-change areas, and other wall surface subareas outside the no-change areas are marked as change areas.
5. The intelligent monitoring method for the surrounding rock of the coal mine shaft according to claim 4, wherein the stress data of each wall sub-area is monitored, and the process of dividing the surrounding rock of the shaft into different stress layers according to the monitored stress data comprises the following steps:
Stress monitoring units are respectively arranged in the centers of the wall surface sub-areas, stress data of each wall surface sub-area are monitored through the stress monitoring units, different numerical intervals are set for the stress data, and the monitored stress data are divided into the corresponding numerical intervals so as to divide the whole surrounding rock of the shaft into different stress layers.
6. The intelligent monitoring method for surrounding rock of coal mine shaft according to claim 5, wherein the process of monitoring the vibration amplitude of each wall sub-area to obtain the vibration variation amplitude of each variation area before and after the variation in different stress layers comprises the following steps:
respectively arranging vibration monitoring units in the centers of the wall sub-areas, monitoring the vibration amplitude of each wall sub-area through the vibration monitoring units, incorporating the vibration amplitude of the change area in a monitoring period before change and a monitoring period after change into a vibration amplitude set of the change area in the adjacent monitoring period, and constructing a vibration change line graph according to the vibration amplitude set;
And obtaining an amplitude average value before change and an amplitude average value after change in the vibration change line diagram, taking the difference value of the amplitude average value before change and the amplitude average value after change as the vibration change amplitude of the change area before change and after change, and binding the obtained vibration change degree with the stress layer to which the change area belongs.
7. The intelligent monitoring method for coal mine shaft surrounding rock according to claim 6, wherein the process of setting an evaluation period and obtaining the change frequency of each change area and dividing the obtained change frequency into different change frequency intervals comprises the following steps:
Setting an evaluation period, and when one evaluation period is reached, obtaining the change times of a change region in the evaluation period, wherein the change times are the times of state change of the change region in the evaluation period, and obtaining the change frequency of the change region in the evaluation period according to the change times;
Different change frequency intervals are set for the obtained change frequency, and the change frequency of each change area in the same evaluation period is divided into corresponding change frequency intervals.
8. The intelligent monitoring method for surrounding rock of coal mine shaft according to claim 7, wherein the process of comparing vibration variation amplitudes of the variation areas belonging to the same stress layer and the same variation frequency interval to obtain corresponding abnormal amplitude areas, generating abnormal amplitude signals and feeding back the abnormal amplitude signals comprises the following steps:
Obtaining vibration variation amplitude of variation areas belonging to the same stress layer and the same variation frequency interval in the same evaluation period, obtaining evaluation coefficients of the variation areas, setting evaluation standards, comparing the evaluation coefficients with the evaluation standards, obtaining abnormal amplitude areas according to comparison results, generating corresponding abnormal amplitude signals and feeding the abnormal amplitude signals back to related personnel.
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