CN102155264B - Method for detecting abnormal gas quantity monitoring information in coal mine monitoring system - Google Patents
Method for detecting abnormal gas quantity monitoring information in coal mine monitoring system Download PDFInfo
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- CN102155264B CN102155264B CN 201110076771 CN201110076771A CN102155264B CN 102155264 B CN102155264 B CN 102155264B CN 201110076771 CN201110076771 CN 201110076771 CN 201110076771 A CN201110076771 A CN 201110076771A CN 102155264 B CN102155264 B CN 102155264B
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Abstract
The invention relates to a method for detecting abnormal gas quantity monitoring information in a coal mine monitoring system, comprising the step of recording the difference value of the maximum value and the minimum value in measured values of all gas sensors in a same airflow section in a same roadway among a plurality of gas sensors of the downstream of a working surface as a range value D, namely, a first range value D1 close to a main gas rushing-out position is more than a second range value D2 far away the main gas rushing-out position, if the above condition is not met, after a certain time, an alarm is given. As the gas rushing-out quantity is non-uniform, and mixing of gas and air needs a certain time, the mixing of the gas close to a coal wall and the air can form a state similar to a plurality of gas-air masses; and then the gas-air masses are gradually diffused along the air flowing direction, and the gas and the air are mixed uniformly gradually. As the gas close to the main gas rushing-out position and the air are mixed more non-uniformly, the fluctuation of the gas content measured by the sensors is greater correspondingly.
Description
Technical field
The present invention relates to the technical field of Real-Time Monitoring under the coal mine, specifically a kind of unusual method of gas amount monitoring information that detects in the mine supervision system.
Background technology
Coal mine safety monitoring system is widely used a kind of watch-dog in the colliery, is mainly used in monitoring various environment and equipment state under the coal mine, and the control of cutting off the power supply when finding gas exceeding limit is found to report to the police when other are unusual and cut off the power supply control.Present coal mine safety monitoring system mainly is that value surpasses or is lower than certain value (being called overload alarm) to (CH4, CO, wind speed etc.) unusual method of discrimination of analog signals.These methods all are based on single-sensor merely take the size of measured value as distinguishing rule, and the other unusual (using unusual) in using for the mine supervision system can not be found.For example: Chinese patent application 200510017856.0 discloses a kind of method that a kind of mine gas prevention and control is used the multi-system information synthesis display, it is characterized in that of the identification judging unit that wherein proposes: index system comprises gas density control index, threshold index, the CO concentration index of varying environment condition, target oxygen concentration, temperature index, wind speed index etc., the method belongs to the overload alarm method.The unusual model of Chinese patent application 200710113902.6 disclosed differentiations also belongs to conventional overload alarm pattern.
Chinese patent application: 200910306338.9 disclose a kind of analog sensor alarm method of the non-principle that transfinites, and it can find situation about not using in accordance with regulations, are not placed on the position of regulation such as sensor, stop that with foreign matter probe detects mouthful.But the type of the document disclosed " the monitored data Normal appearances model of the non-principle that transfinites " is less, the actual conditions that can not comprehensively reflect the colliery, and need to set up model according to field condition when using, modeling comparison is complicated, so its practicality needs further to improve.
Summary of the invention
The technical problem to be solved in the present invention provides the unusual method of gas amount monitoring information in the detection mine supervision system that a kind of application is convenient, practicality is stronger.
For solving the problems of the technologies described above, the invention provides a kind of unusual method of gas amount monitoring information that detects in the mine supervision system, it comprises: in the same tunnel under coal mine, a plurality of firedamp sensors in the work plane downstream distribute along wind direction, maximum value in one time period in the measured value of each firedamp sensor is designated as extreme difference value D with the difference of minimum value, then should meet under normal circumstances: the first extreme difference value D1 that the firedamp sensor that contiguous work plane (being that gas is mainly gushed out a little) is located records greater than away from the firedamp sensor at work plane place at the t that delays time
0The the second extreme difference value D2 that within the time period of same length, records afterwards; If do not satisfy this condition and reach certain hour, then be judged as the unusual also warning of gas amount monitoring information in the mine supervision system.
Further, the unusual method of gas amount monitoring information in the described detection mine supervision system, also comprise: be distributed with a plurality of firedamp sensors along wind direction in the same tunnel that does not have new wind to add under coal mine, should meet when normal: the firedamp sensor of the minimum value that the firedamp sensor of distinguished and admirable upstream end records in the section sometime≤distinguished and admirable downstream part is at time-delay t
0The minimum value that records in the time period of rear same length, wherein t
0Be distinguished and admirable translation time, t
0Equal two distances between the firedamp sensor divided by wind speed; If do not satisfy above-mentioned condition and reach certain hour, then be judged as gas amount monitoring information in the mine supervision system unusual and send warning.
Further, the unusual method of gas amount monitoring information in the described detection mine supervision system also comprises: the correlation between the measured value that does not have two firedamp sensors in work plane downstream in the same tunnel that new wind adds under coal mine meets: the firedamp sensor of distinguished and admirable upstream end in very first time section one group of measured value and the correlation index between one group of measured value of firedamp sensor within the second time period of distinguished and admirable downstream part
Greater than a setting value;
If do not satisfy this condition and reach certain hour, then be judged as gas amount monitoring information in the mine supervision system unusual and send warning;
Wherein: the time difference of described first, second time period is distinguished and admirable translation time t
0, this distinguished and admirable translation time t
0Be two distances between the firedamp sensor and the ratio of wind speed.
Described correlation index
Calculate according to the formula that calculates two groups of stochastic variable index of correlation in the probability theory:
Wherein: X, Y are respectively two groups of measured values that two firedamp sensors are measured, wherein: the E(X) mathematic expectaion of expression variable X, E(Y) mathematic expectaion of expression variable Y.
Described measured value refers to the average of each firedamp sensor a plurality of measurement numerical value within a certain period of time.
The present invention has positive effect: the unusual method of gas amount monitoring information in the detection mine supervision of the present invention system, specifically set up by " the monitored data Normal appearances model of the non-principle that transfinites ", that is: in the same tunnel between a plurality of firedamp sensors that distribute along wind direction in work plane downstream, the magnitude relationship of the difference (being designated as D) of the maximum value of the measured value within a certain period of time of each firedamp sensor and minimum value should meet in same air-flow section: near the gas D value at a place of mainly gushing out〉away from the gas D value at a place of mainly gushing out; Its principle is: because gushing out of gas is not that the mixing of gas and air also needs a period of time uniformly, so the mixing of the gas at close rib place and air can form the state of similar one by one gas air mass.Then the gas air mass spreads gradually along wind direction, and the gas air mixes progressively even.Because more inhomogeneous near mainly the gush out mixing of the gas at a place and air of gas, the gas bearing capacity fluctuation that sensor records is corresponding larger.If occur suddenly landslide in the same tunnel or because the crack appears in vibrations, new " gas is mainly gushed out a little " will occur, this moment, described first, second extreme difference value will change, and just needed this moment to report to the police.The present invention has enlarged the function of system for the mine supervision system provides a kind of new unusual method of detection, has also further improved the reliability of system.
Description of drawings
For content of the present invention is more likely to be clearly understood, below the specific embodiment and by reference to the accompanying drawings of basis, the present invention is further detailed explanation, wherein
The distribution schematic diagram of Fig. 1 each firedamp sensor when implementing the unusual method of gas amount monitoring information in the detection mine supervision of the present invention system.
The specific embodiment
(embodiment 1)
Such as Fig. 1, in work plane, two positions of return airway the first firedamp sensor T is set
1, the second firedamp sensor T
2, work plane is mainly gushing out a little of coal mine gas.In the same tunnel under coal mine, between a plurality of firedamp sensors that distribute along wind direction in work plane downstream, it is arbitrary value between 1-10 minute that the difference that each firedamp sensor obtains a maximum value that should record in the time period and minimum value at set intervals is designated as length that extreme difference value D(should the time period, the equal in length of the time period of each sensor), the extreme difference value of each firedamp sensor should meet: mainly gush out the first extreme difference value D1 that the firedamp sensor at a place records of contiguous gas locates firedamp sensor at time-delay t greater than mainly gushing out away from gas
0Life period was poor when the second extreme difference value D2(that records within the time period of same length afterwards flowed through different sensors owing to same air mass, and downstream sensor should be orientated rear time-delay t during the measured value comparison
0Measured value, time t
0Equal between two sensors apart from the ratio of wind speed.Because wind speed is different everywhere in the tunnel, this wind speed should be the wind speed between the two sensors); If do not satisfy this condition and reach certain hour (such as 30 minutes), then be judged as the unusual also warning of gas amount monitoring information in the mine supervision system.
(embodiment 2)
The unusual method of gas amount monitoring information in the detection mine supervision system of the present embodiment comprises: be distributed with a plurality of firedamp sensors along wind direction in the same tunnel that does not have new wind to add under coal mine, should meet when normal: the firedamp sensor of the minimum value that the firedamp sensor of distinguished and admirable upstream end records in the section (length of this time period is the arbitrary value between 1-10 minute, the equal in length of the time period that each sensor detects) sometime≤distinguished and admirable downstream part is at time-delay t
0The minimum value that records in the time period of rear same length, wherein t
0Be distinguished and admirable translation time, t
0(life period is poor when flowing through different sensors owing to same air mass, and downstream sensor should be orientated rear time-delay t during the measured value comparison divided by wind speed to equal two distances between the firedamp sensor
0Measured value, time t
0Equal the ratio of two distances between the sensor and wind speed.Because wind speed is different everywhere in the tunnel, this wind speed should be the wind speed between the sensor); If do not satisfy above-mentioned condition and reach certain hour, then be judged as gas amount monitoring information in the mine supervision system unusual and send warning.
Implementation such as Fig. 1 arrange the first firedamp sensor T in work plane, two positions of return airway
1, the second firedamp sensor T
2, work plane is mainly gushing out a little of coal mine gas.Adopt following method to realize the abnormal alarm function in the mine supervision system: configurator is to the first firedamp sensor T on the monitoring system main frame
1, the second firedamp sensor T
2The minimum value that (in 5 minutes) in the certain hour scope record is carried out record, again with the first firedamp sensor T
1The minimum value C1 that records and the second firedamp sensor time-delay t
0After the minimum value C2 that records relatively, if C1≤C2 is normal; If do not satisfy this condition and reach certain hour (such as 30 minutes), just send warning.
Its principle is: do not have in the same tunnel of new distinguished and admirable adding, the minimum value in the certain hour that each firedamp sensor that distributes along wind direction records in same air-flow section can not reduce along wind direction; Underground air is emerged with the distinguished and admirable gas that also has in the rib of tunnel along the road, so the gas in downstream can be more than the gas of upstream, again because gas is gushed out the after gas air mass with distinguished and admirable never even process to even variation, so the minimum value of gas density can not reduce in same Tuanfeng County stream from rib.
(embodiment 3)
Correlation between the measured value that does not have two firedamp sensors in work plane downstream in the same tunnel that new wind adds under coal mine meets: the firedamp sensor of distinguished and admirable upstream end in very first time section (length of this time period is the arbitrary value between 1-8 hour) one group of measured value (each measured value is the average in 1-10 minute) and the correlation index between the measured value of firedamp sensor within the second time period of distinguished and admirable downstream part
Greater than a setting value; If do not satisfy this condition and reach certain hour, then be judged as gas amount monitoring information in the mine supervision system unusual and send warning;
Wherein: the time span of described first, second time period is identical, and the time difference of first, second time period starting point is distinguished and admirable translation time t
0, this distinguished and admirable translation time t
0Be two distances between the firedamp sensor and the ratio of wind speed.Such as Fig. 1, in work plane, two positions of return airway the first firedamp sensor T1, the second firedamp sensor T2 are set, work plane is mainly gushing out a little of coal mine gas.
Described correlation index
Calculate according to the formula that calculates two groups of stochastic variable index of correlation in the probability theory:
Wherein: X, Y are respectively two groups of measured values that two firedamp sensors are measured, wherein: the E(X) mathematic expectaion of expression variable X, E(Y) mathematic expectaion of expression variable Y; When 0＜| during r|＜1, represent that there is linear correlation to a certain degree in two variablees, and | r| is more near 1, and the linear relationship between expression variable X, the Y is closer; | r| is more close to 0, and the linear relationship between expression variable X, the Y is more weak.
Described measured value refers to the average of a plurality of measurement numerical value of each firedamp sensor in certain hour (1-10 minute).
In the mine supervision system, adopt following method to realize the abnormal alarm function: as above shown in Figure 1, at first should measure and calculate the first firedamp sensor T
1(be placed on work plane, be in distinguished and admirable upstream) and the second firedamp sensor T2(are placed on return airway, are in distinguished and admirable downstream) to measure the time difference that same air mass exists, this time difference is distinguished and admirable translation time t
0, distinguished and admirable translation time t
0Equal the second firedamp sensor T
2With the first firedamp sensor T
1Between the ratio (because wind speed is different everywhere in the tunnel, this wind speed should be two wind speed between the sensor) of distance and wind speed.Then select the time period (between 1-8 hour) of comparing data.Extract the first firedamp sensor T
1One group of survey data (each data is the measurement average in 5 minutes) in this time period is extracted the second firedamp sensor T again
2This time period is translation time t backward
0One group of survey data.
Index of correlation to these two groups of data is differentiated, if satisfy afterwards " index of correlation〉setting value ", then be considered as normal.If do not satisfy this condition and reach certain hour (such as 30 minutes), then be judged as gas amount monitoring information in the mine supervision system unusual and send warning.
Character according to index of correlation: when 0＜| during r|＜1, represent that there is linear correlation to a certain degree in two variablees.And | r| is more closer near linear relationship between 1, two variable; | r| represents that more close to 0 the linear correlation of two variablees is more weak.Generally can be by three grades of divisions: | r|＜0.4 is low linear correlation; 0.4≤| r|＜0.7 is relevant for conspicuousness; 0.7≤| r|＜1 is relevant for highly linear.
In the present embodiment, described " setting value " general desirable 0.4.In order to obtain higher warning sensitivity, also can adjust according to the concrete condition of each ore deposit work plane.Such as: if two sensor distance are nearer, " setting value " desirable 0.6-0.8.
The gas concentration of measuring owing to two firedamp sensors exists direct related with regional gas emission and distinguished and admirable air quantity, not new distinguished and admirable fashionable between two each and every one firedamp sensors, two gas emissions (the gas emission ratio in the tunnel is relatively low) that regional gas emission corresponding to firedamp sensor mainly all is work plane certainly exist correlation between the measured value of two sensors.
By this technology, not only can find the situation that the mine supervision system does not use in using in accordance with regulations, can find that also the situation of unusual (such as occurring unusual Gas point in the tunnel between two firedamp sensors) appears in coal mine production system.
Above-described embodiment only is for example of the present invention clearly is described, and is not to be restriction to embodiments of the present invention.For those of ordinary skill in the field, can also make other changes in different forms on the basis of the above description.Here need not also can't give all embodiments exhaustive.And these belong to apparent variation or the change that spirit of the present invention extended out and still are among protection scope of the present invention.
Claims (1)
1. unusual method of gas amount monitoring information that detects in the mine supervision system, it is characterized in that: in the same tunnel under coal mine, a plurality of firedamp sensors in the work plane downstream distribute along wind direction, maximum value in one time period in the measured value of each firedamp sensor is designated as extreme difference value D with the difference of minimum value, should meet under normal circumstances: the first extreme difference value D1 that the firedamp sensor at contiguous work plane place records greater than away from the firedamp sensor at work plane place at the t that delays time
0The the second extreme difference value D2 that within the time period of same length, records afterwards; T wherein
0Be distinguished and admirable translation time, t
0Equal described contiguous work plane place and away between two firedamp sensors at work plane place apart from divided by wind speed; If do not satisfy this condition and reach certain hour, then be judged as the unusual also warning of gas amount monitoring information in the mine supervision system.
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| CN102608286B (en) * | 2012-03-01 | 2015-07-08 | 煤炭科学技术研究院有限公司 | Method for monitoring abnormality of gas monitored value of coal mine in real time |
| CN102926810B (en) * | 2012-11-16 | 2014-09-10 | 天地（常州）自动化股份有限公司 | Forecasting method of coal and gas outburst |
| CN102944664B (en) * | 2012-11-30 | 2016-01-20 | 天地（常州）自动化股份有限公司 | The method of test coal gas desorption properties |
| CN104537199B (en) * | 2014-10-20 | 2017-09-05 | 天地（常州）自动化股份有限公司 | The method that mine working face production process is recognized using gas density time series |
| CN104747229B (en) * | 2015-02-27 | 2017-03-01 | 神华集团有限责任公司 | The safe working method of high methane region driving face in low gaseous mine |
| CN106096633A (en) * | 2016-06-05 | 2016-11-09 | 丁旭秋 | coal mine gas concentration measuring method |
| CN107100674B (en) * | 2017-04-17 | 2019-01-08 | 天地（常州）自动化股份有限公司 | The recognition methods of pseudo- data is tested in calibration in mining gas sensor monitoring data |
| CN109184796B (en) * | 2018-09-21 | 2020-11-24 | 中铁十六局集团有限公司 | Method for detecting gas concentration through gas emission quantity of air pipe orifice of tunnel face of main tunnel |
| CN110593954B (en) * | 2019-08-28 | 2020-06-19 | 精英数智科技股份有限公司 | Method and device for identifying position abnormality of gas sensor on coal mine coal face |
| CN111577394A (en) * | 2020-05-25 | 2020-08-25 | 贵州工程应用技术学院 | Method for calculating average wind speed of coal mine tunnel |
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| US4968978A (en) * | 1988-09-02 | 1990-11-06 | Stolar, Inc. | Long range multiple point wireless control and monitoring system |
| CN1861986A (en) * | 2006-06-12 | 2006-11-15 | 公安部天津消防研究所 | Method of preventing producing firing resource in coal mine tunnel and apparatus of realizing said method thereof |
| RU2401947C2 (en) * | 2009-01-16 | 2010-10-20 | Андрей Викторович Демидюк | Underground system of monitoring, annunciation and determination of mine worker location |
| CN101519979A (en) * | 2009-04-09 | 2009-09-02 | 中铁二局股份有限公司 | Tunnel gas monitoring system |
| CN101649751B (en) * | 2009-08-31 | 2011-09-28 | 天地（常州）自动化股份有限公司 | Monitoring method of coal mine safety monitoring system |
| CN201496105U (en) * | 2009-08-31 | 2010-06-02 | 天地（常州）自动化股份有限公司 | Colliery safety monitoring system |
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