CN113027526B - Method and system for judging reliability of mine ventilation system - Google Patents
Method and system for judging reliability of mine ventilation system Download PDFInfo
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- CN113027526B CN113027526B CN202110319167.4A CN202110319167A CN113027526B CN 113027526 B CN113027526 B CN 113027526B CN 202110319167 A CN202110319167 A CN 202110319167A CN 113027526 B CN113027526 B CN 113027526B
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Classifications
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- E—FIXED CONSTRUCTIONS
- E21—EARTH DRILLING; MINING
- E21F—SAFETY DEVICES, TRANSPORT, FILLING-UP, RESCUE, VENTILATION, OR DRAINING IN OR OF MINES OR TUNNELS
- E21F17/00—Methods or devices for use in mines or tunnels, not covered elsewhere
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- E—FIXED CONSTRUCTIONS
- E21—EARTH DRILLING; MINING
- E21F—SAFETY DEVICES, TRANSPORT, FILLING-UP, RESCUE, VENTILATION, OR DRAINING IN OR OF MINES OR TUNNELS
- E21F1/00—Ventilation of mines or tunnels; Distribution of ventilating currents
Abstract
The invention provides a method and a system for judging the reliability of a mine ventilation system, wherein the method comprises the following steps: determining a plurality of ventilation indexes and acquiring standard reference ranges corresponding to different ventilation indexes; acquiring a ventilation index evaluation value corresponding to the mine aiming at each ventilation index; searching and obtaining an evaluation result corresponding to each ventilation index in a standard reference range according to the ventilation index evaluation value; calculating a scoring value corresponding to each ventilation index according to the evaluation result; substituting the scoring value into a judgment formula to calculate and obtain a judgment result. The method for judging the reliability of the mine ventilation system provided by the invention can provide scientific judgment results for mine ventilation conditions, and gives consideration to a plurality of mine ventilation index systems such as reliability, controllability, testability and the like of a mine ventilation network.
Description
Technical Field
The invention relates to the field of coal mines, in particular to a method and a system for judging reliability of a mine ventilation system.
Background
70% of energy and industrial raw materials in China come from the mining industry, and 80% of the energy and industrial raw materials in the mining industry belong to underground mining. However, in the mine production process, ground air must be continuously conveyed to various underground operation sites to supply the breathing of personnel, and various harmful gases and mine dust in the underground are diluted and removed, so that good mine climate conditions are created, and the physical health and labor safety of underground operators are ensured. It follows that mine ventilation systems are of importance in the underground mining industry.
As the depth and range of mining of mines are continuously enlarged, the structure of ventilation networks is increasingly complex, the difficulty of mine ventilation problems is increasing, and the solution of the problems is increasingly dependent on basic science theory and application of new technology. The development trend of the existing mine ventilation technology is the establishment and operation of modern oversized high-yield high-efficiency mine, and the automation, the intellectualization and the unmanned mine ventilation are realized gradually. At present, the domestic mine ventilation management still continues to be a method mainly comprising qualitative analysis and experience management, and has no unified standard, rule and specification.
Disclosure of Invention
Based on the problems, the invention provides a method and a system for judging the reliability of a mine ventilation system, which solve the technical problems that in the prior art, the mine ventilation management is still continued by a method mainly comprising qualitative analysis and experience management, and unified standards, rules and specifications are not available.
The invention provides a method for judging reliability of a mine ventilation system, which comprises the following steps:
determining a plurality of ventilation indexes and acquiring standard reference ranges corresponding to different ventilation indexes;
acquiring a ventilation index evaluation value corresponding to the mine aiming at each ventilation index;
searching and obtaining an evaluation result corresponding to each ventilation index in a standard reference range according to the ventilation index evaluation value;
calculating a scoring value corresponding to each ventilation index according to the evaluation result;
substituting the scoring value into a judgment formula to calculate to obtain a judgment result, wherein the judgment formula is as follows:
wherein F is the judgment result, q i A score value for each index.
In addition, the ventilation index includes: the air quantity supply and demand ratio of the air utilization place, the number of the angle joints with unstable air flow of the air utilization area, the number of independent meshes of a mine ventilation network, the ratio of the angle joints of the mine ventilation network to the total number of branches, the equal-area holes of mine ventilation, the resistance percentage of a mine return air section, the resistance percentage of a public section and the minimum system resistance percentage, the resistance ratio of a maximum air well system to a minimum air well system, the effective air quantity rate of a mine, the air leakage rate of the mine, the standby coefficient of a main ventilator capability, the reliability coefficient of a mine ventilation system, the controllability coefficient of the mine ventilation system and/or the testability coefficient of the mine ventilation system.
In addition, the air quantity supply-demand ratio of the air consumption place is obtained by calculating the ratio of the actual air quantity of the air consumption place to the air quantity required.
In addition, the independent mesh number of the mine ventilation network is the number of independent meshes formed after the air duct is removed from the total air duct;
and giving a judging result according to the number of the air channels and the number of independent meshes of the mine ventilation network, wherein the judging result comprises qualification, basic qualification and to-be-rectified.
In addition, when the number of the air channels is more than or equal to 10 and less than 20, the independent mesh number of the mine ventilation network is judged to be qualified when the number of the independent mesh number of the mine ventilation network is less than 20, the independent mesh number of the mine ventilation network is judged to be basically qualified when the number of the independent mesh number of the mine ventilation network is more than or equal to 20 and less than 30, and the independent mesh number of the mine ventilation network is judged to be changed when the number of the independent mesh number of the mine ventilation network is more than or equal to 30;
when the number of the air channels is smaller than 10, the independent mesh number of the mine ventilation network is judged to be qualified when the number of the independent mesh number of the mine ventilation network is smaller than 10, when the number of the independent mesh number of the mine ventilation network is larger than or equal to 10 and smaller than 20, the independent mesh number of the mine ventilation network is judged to be basically qualified, and when the number of the independent mesh number of the mine ventilation network is larger than or equal to 20, the independent mesh number of the mine ventilation network is judged to be changed;
when the number of the air channels is greater than or equal to 20, the independent mesh number of the mine ventilation network is judged to be qualified when the number of the independent mesh number of the mine ventilation network is less than 30, when the number of the independent mesh number of the mine ventilation network is greater than or equal to 30 and less than 40, the independent mesh number of the mine ventilation network is judged to be basically qualified, and when the number of the independent mesh number of the mine ventilation network is greater than or equal to 40, the independent mesh number of the mine ventilation network is judged to be corrected.
In addition, the angle branch number is obtained through the ventilation network diagram, and the ratio of the angle branch number to the total branch number is obtained through the ratio of the angle branch number to the total branch number of the mine ventilation network.
In addition, when the wind pressure is Pa, the equivalent volume Kong Dengyu 1.19.19Q of mine ventilation Ore ore Divided by
When the wind pressure is mmH2O manufactured by engineering units, the equal volume Kong Dengyu 0.38.38Q of mine ventilation Ore ore Divided by
In addition, wind resistance distributed on the wind line is accumulated to obtain a total resistance value, and the resistance of the return air section is obtained, wherein the ratio of the resistance of the return air section to the total resistance value is the percentage of the resistance of the return air section of the mine.
In addition, the reliability coefficient of each air duct is calculated respectively, and the reliability coefficient of each air duct is multiplied by the reliability weight of each air duct and then summed to form the reliability coefficient of the mine ventilation system.
In addition, the controllability coefficients of the air channels are calculated respectively, and the controllability coefficients of the air channels are multiplied by the weight of the controllability coefficients of the air channels and summed to form the controllability coefficients of the mine ventilation system.
The invention also provides a system for judging the reliability of the mine ventilation system, which comprises at least one processor; and a memory communicatively coupled to the at least one processor; wherein the memory stores instructions executable by the one processor, the instructions being executable by the at least one processor to enable the at least one processor to:
determining a plurality of ventilation indexes and acquiring standard reference ranges corresponding to different ventilation indexes;
acquiring a ventilation index evaluation value corresponding to the mine aiming at each ventilation index;
searching and obtaining an evaluation result corresponding to each ventilation index in a standard reference range according to the ventilation index evaluation value;
calculating a scoring value corresponding to each ventilation index according to the evaluation result;
substituting the scoring value into a judgment formula to calculate to obtain a judgment result, wherein the judgment formula is as follows:
wherein F is the judgment result, q i For each ofScoring values of the indicators.
By adopting the technical scheme, the method has the following beneficial effects:
the method for judging the reliability of the mine ventilation system provided by the invention can provide scientific judgment results for mine ventilation conditions, and gives consideration to a plurality of mine ventilation index systems such as reliability, controllability, testability and the like of a mine ventilation network.
Drawings
FIG. 1 is a flow chart of a method for evaluating reliability of a mine ventilation system provided in one embodiment of the present invention;
fig. 2 is a flowchart of a method for evaluating reliability of a mine ventilation system according to an embodiment of the present invention.
Detailed Description
The invention is described in further detail below with reference to the specific embodiments and the accompanying drawings. It is intended that the invention be limited only by the specific embodiments illustrated and not by any means, but that it is intended that the invention be limited only by the terms of the appended claims.
Referring to fig. 1, the invention provides a method for evaluating reliability of a mine ventilation system, which comprises the following steps:
step S001, determining a plurality of ventilation indexes and acquiring standard reference ranges corresponding to different ventilation indexes;
step S002, obtaining ventilation index evaluation values corresponding to the mine aiming at each ventilation index;
step S003, searching in a standard reference range according to the ventilation index evaluation value to obtain an evaluation result corresponding to each ventilation index;
step S004, calculating and obtaining a scoring value corresponding to each ventilation index according to the evaluation result;
step S005, substituting the scoring value into a judgment formula to calculate to obtain a judgment result, wherein the judgment formula is as follows:
wherein F is the judgment result, q i A score value for each index.
In the prior art, the management of mine ventilation is still continued by a method mainly comprising qualitative analysis and experience management, and unified standards, rules and specifications are not available, so that a method for researching and making a set of mine ventilation index system mainly comprising air quantity, air pressure, equal area holes, maximum resistance route, resistance distribution, effective air quantity rate, mine air leakage rate and main ventilator operation efficiency and comprehensively considering the reliability, controllability and testability of a mine ventilation network is urgently needed, and quantification is performed on a qualitative basis.
In the method for evaluating reliability of a mine ventilation system provided in this embodiment, first, in step S001, a plurality of ventilation indexes are determined, and standard reference ranges corresponding to different ventilation indexes are obtained, for example, the ventilation indexes can select the air quantity supply and demand ratio of a wind site, the number of independent meshes of a mine ventilation network, the ratio of the number of the angular branches of the mine ventilation network to the total number of branches, the equal-area holes of mine ventilation, the resistance percentage of a mine return air section, the resistance percentage of a public section and the minimum system resistance, the resistance ratio of the maximum and minimum wind well systems, the effective air quantity rate of a mine, the air leakage rate of a mine, the reserve coefficient of a main ventilation capability, the reliability coefficient of the mine ventilation system, the controllability coefficient of the mine ventilation system or the testability coefficient of the mine ventilation system, and the standard reference ranges corresponding to different ventilation indexes are shown in table 1:
TABLE 1
The specific conditions for evaluating the mine ventilation system are classified into qualification, basic qualification and to-be-rectified.
Alternatively, the score for each index in Table 1 is q i (i=1, 2,., 14) represents the range of values of each index: the qualification range is [0.8,1]]The basic qualification range is [0.6,0.8 ], and the range to be rectified is [0,0.6 ].
Step S002, obtaining ventilation index evaluation values corresponding to the mine aiming at each ventilation index;
and determining the ventilation index evaluation value corresponding to the mine through underground actual detection, recording, investigation and calculation or related software measurement and calculation.
Step S003, searching in a standard reference range according to the ventilation index evaluation value to obtain an evaluation result corresponding to each ventilation index;
step S004, calculating and obtaining a scoring value corresponding to each ventilation index according to the evaluation result; score value q v And (3) representing.
Step S005, substituting the scoring value into a judgment formula to calculate to obtain a judgment result, wherein the judgment formula is as follows:
wherein F is the judgment result, q i A score value for each index.
The embodiment solves the technical problems that in the prior art, the mine ventilation management still continues to be mainly based on qualitative analysis and experience management, and unified standards, rules and specifications are not available, and the evaluation method for the reliability of the mine ventilation system provided by the embodiment can provide scientific evaluation results for mine ventilation conditions and gives consideration to a plurality of mine ventilation index systems such as reliability, controllability and testability of a mine ventilation network.
In one embodiment thereof, the ventilation index comprises: the air quantity supply and demand ratio of the air utilization place, the number of the angle joints with unstable air flow of the air utilization area, the number of independent meshes of a mine ventilation network, the ratio of the angle joints of the mine ventilation network to the total number of branches, the equal-area holes of mine ventilation, the resistance percentage of a mine return air section, the resistance percentage of a public section and the minimum system resistance percentage, the resistance ratio of a maximum air well system to a minimum air well system, the effective air quantity rate of a mine, the air leakage rate of the mine, the standby coefficient of a main ventilator capability, the reliability coefficient of a mine ventilation system, the controllability coefficient of the mine ventilation system and/or the testability coefficient of the mine ventilation system. Through the ventilation indexes, the mine ventilation condition can be accurately and scientifically judged.
In one embodiment, the air supply-demand ratio of the air consumption point is obtained by calculating the ratio of the actual air supply volume to the air demand volume of the air consumption point. Firstly, calculating the ratio of the actual air supply quantity to the required air quantity of each air consumption point, if the air supply and demand ratio of a certain air duct cannot meet the requirement, rectifying the air duct, and meanwhile, calculating the total air quantity supply and demand ratio of the whole mine as one of evaluation indexes of the whole mine.
In one embodiment, the number of independent meshes of the mine ventilation network is the number of independent meshes formed after the air duct is removed from the total air duct;
and giving a judging result according to the number of the air channels and the number of independent meshes of the mine ventilation network, wherein the judging result comprises qualification, basic qualification and to-be-rectified. The number of independent meshes of the mine ventilation network is used as an index, and the number of the air channels is combined to judge whether the air channels are qualified and the specific grade.
In one embodiment, when the number of the air channels is greater than or equal to 10 and less than 20, the independent mesh number of the mine ventilation network is determined to be qualified when the number of the independent mesh number of the mine ventilation network is less than 20, and is determined to be basically qualified when the number of the independent mesh number of the mine ventilation network is greater than or equal to 20 and less than 30, and is determined to be rectified when the number of the independent mesh number of the mine ventilation network is greater than or equal to 30;
when the number of the air channels is smaller than 10, the independent mesh number of the mine ventilation network is judged to be qualified when the number of the independent mesh number of the mine ventilation network is smaller than 10, when the number of the independent mesh number of the mine ventilation network is larger than or equal to 10 and smaller than 20, the independent mesh number of the mine ventilation network is judged to be basically qualified, and when the number of the independent mesh number of the mine ventilation network is larger than or equal to 20, the independent mesh number of the mine ventilation network is judged to be changed;
when the number of the air channels is greater than or equal to 20, the independent mesh number of the mine ventilation network is judged to be qualified when the number of the independent mesh number of the mine ventilation network is less than 30, when the number of the independent mesh number of the mine ventilation network is greater than or equal to 30 and less than 40, the independent mesh number of the mine ventilation network is judged to be basically qualified, and when the number of the independent mesh number of the mine ventilation network is greater than or equal to 40, the independent mesh number of the mine ventilation network is judged to be corrected. By giving specific numerical values and grading, the judgment is made easier.
In one embodiment, the angle branch number is obtained through the ventilation network diagram, and the ratio of the angle branch number to the total branch number is obtained through the ratio of the angle branch number to the total branch number of the mine ventilation network. The ratio of the corner branch number to the total branch number of the mine ventilation network is obtained by calculating the ratio of the corner branch number to the total branch number,
in one embodiment, when the wind pressure is Pa, international Unit System, mine ventilation equal volume Kong Dengyu 1.19.19Q Ore ore Divided byQ represents the total exhaust air quantity of a main ventilator of the mine, the unit is cubic meters per second, the subscript ore represents the mine,representing the ventilation resistance of the mine.
When the wind pressure is mmH2O manufactured by engineering units, the equal volume Kong Dengyu 0.38.38Q of mine ventilation Ore ore Divided byTo facilitate different unit systems, algorithms for mine ventilation equal volume holes corresponding to the two unit systems are provided.
In one embodiment, the total resistance value is obtained by accumulating wind resistance distributed on the wind line, and the resistance of the return air section is obtained, wherein the ratio of the resistance of the return air section to the total resistance value is the percentage of the resistance of the return air section of the mine.
The ventilation network is divided into three areas of an air inlet area, an air consumption area and a return air area according to different functions, and the air channels special for the air consumption area and the air channels special for the return air consumption area are also appointed as air consumption channels. And then carrying out resistance value accumulation analysis on wind resistances distributed in three areas on each wind using line, analyzing to obtain total resistance values of the three areas, namely the wind inlet area, the wind using area and the wind return area, and calculating the ratio of the resistance of the wind return section to the total resistance value to be the resistance percentage of the wind return section of the mine.
In one embodiment, the reliability coefficient of each air duct is calculated respectively, and the reliability coefficient of each air duct is multiplied by the reliability weight of each air duct and then summed to form the reliability coefficient of the mine ventilation system. And finally, calculating the reliability coefficient of the mine ventilation system by respectively calculating the reliability coefficient of each air duct, thereby providing a basis for the judgment result.
In one embodiment, the controllability coefficients of the air ducts are calculated respectively, and the controllability coefficients of the air ducts are multiplied by the weight of the controllability coefficients of the air ducts and summed to form the controllability coefficients of the mine ventilation system. And (5) calculating the controllability coefficient of the mine ventilation system to give a judgment basis.
Referring to fig. 2, the invention provides a method for evaluating reliability of a mine ventilation system, which comprises the following steps:
in step S201, a plurality of ventilation indexes are determined, and standard reference ranges corresponding to different ventilation indexes are obtained.
Step S202, acquiring a ventilation index evaluation value corresponding to a mine aiming at each ventilation index;
and determining the ventilation index evaluation value corresponding to the mine through underground actual detection, recording, investigation and calculation or related software measurement and calculation.
As shown in table 2, the index names of the ventilation indexes and the ventilation index evaluation values are managed by a table. The ventilation index evaluation value is abbreviated as an evaluation value in the table.
TABLE 2
The ventilation indexes comprise: the air quantity supply and demand ratio of the air utilization place, the number of the angle joints with unstable air flow of the air utilization area, the number of independent meshes of a mine ventilation network, the ratio of the angle joints of the mine ventilation network to the total number of branches, the equal-area holes of mine ventilation, the resistance percentage of a mine return air section, the resistance percentage of a public section and the minimum system resistance percentage, the resistance ratio of a maximum air well system to a minimum air well system, the effective air quantity rate of a mine, the air leakage rate of the mine, the standby coefficient of a main ventilator capability, the reliability coefficient of a mine ventilation system, the controllability coefficient of the mine ventilation system and/or the testability coefficient of the mine ventilation system. Through the ventilation indexes, the mine ventilation condition can be accurately and scientifically judged.
1. The air quantity supply-demand ratio of the air consumption site is obtained by calculating the ratio of the actual air quantity to the required air quantity of the air consumption site. Firstly, calculating the ratio of the actual air supply quantity to the required air quantity of each air consumption point, if the air supply and demand ratio of a certain air duct cannot meet the requirement, rectifying the air duct, and meanwhile, calculating the total air quantity supply and demand ratio of the whole mine as one of evaluation indexes of the whole mine.
2. And analyzing the number of the corner joint wind channels of the wind using places by using the wind area wind flow unstable number through a ventilation network diagram.
3. The independent mesh number of the mine ventilation network is the number of independent meshes formed after the air duct is removed from the total air duct;
and giving a judging result according to the number of the air channels and the number of independent meshes of the mine ventilation network, wherein the judging result comprises qualification, basic qualification and to-be-rectified. The number of independent meshes of the mine ventilation network is used as an index, and the number of the air channels is combined to judge whether the air channels are qualified and the specific grade.
When the number of the air channels is more than or equal to 10 and less than 20, the independent mesh number of the mine ventilation network is judged to be qualified when the number of the independent mesh number of the mine ventilation network is less than 20, when the number of the independent mesh number of the mine ventilation network is more than or equal to 20 and less than 30, the independent mesh number of the mine ventilation network is judged to be basically qualified, and when the number of the independent mesh number of the mine ventilation network is more than or equal to 30, the independent mesh number of the mine ventilation network is judged to be corrected;
when the number of the air channels is smaller than 10, the independent mesh number of the mine ventilation network is judged to be qualified when the number of the independent mesh number of the mine ventilation network is smaller than 10, when the number of the independent mesh number of the mine ventilation network is larger than or equal to 10 and smaller than 20, the independent mesh number of the mine ventilation network is judged to be basically qualified, and when the number of the independent mesh number of the mine ventilation network is larger than or equal to 20, the independent mesh number of the mine ventilation network is judged to be changed;
when the number of the air channels is greater than or equal to 20, the independent mesh number of the mine ventilation network is judged to be qualified when the number of the independent mesh number of the mine ventilation network is less than 30, when the number of the independent mesh number of the mine ventilation network is greater than or equal to 30 and less than 40, the independent mesh number of the mine ventilation network is judged to be basically qualified, and when the number of the independent mesh number of the mine ventilation network is greater than or equal to 40, the independent mesh number of the mine ventilation network is judged to be corrected. By giving specific numerical values and grading, the judgment is made easier.
4. And obtaining the angle branch number through the ventilation network diagram, and obtaining the ratio of the mine ventilation network angle branch number to the total branch number by comparing the angle branch number with the total branch number. The ratio of the corner branch number to the total branch number of the mine ventilation network is obtained by calculating the ratio of the corner branch number to the total branch number,
5. when the air pressure is Pa, the equal volume Kong Dengyu 1.19.19Q of mine ventilation Ore ore Divided by
When the wind pressure is mmH2O manufactured by engineering units, the equal volume Kong Dengyu 0.38.38Q of mine ventilation Ore ore Divided byTo facilitate different unit systems, algorithms for mine ventilation equal volume holes corresponding to the two unit systems are provided.
6. And accumulating wind resistances distributed on the wind utilization line to obtain a total resistance value, and obtaining the resistance of the return air section, wherein the ratio of the resistance of the return air section to the total resistance value is the percentage of the resistance of the return air section of the mine.
The ventilation network is divided into three areas of an air inlet area, an air consumption area and a return air area according to different functions, and the air channels special for the air consumption area and the air channels special for the return air consumption area are also appointed as air consumption channels. And then carrying out resistance value accumulation analysis on wind resistances distributed in three areas on each wind using line, analyzing to obtain total resistance values of the three areas, namely the wind inlet area, the wind using area and the wind return area, and calculating the ratio of the resistance of the wind return section to the total resistance value to be the resistance percentage of the wind return section of the mine.
7. Common segment resistance versus minimum system resistance percentage: the resistance of the public section refers to the sum of the resistance of the public air inlet section (total air inlet section) and the public air return section (total air return section).
The minimum system resistance is: for a single return air well, the overall mine resistance is the minimum system resistance is achieved for multiple air wells.
8. The ratio of the maximum to minimum wind well system resistance is calculated for a system of multiple wind wells.
9. Effective air rate of mine: the effective air volume of the mine (which refers to the sum of the actual air volumes of the air flow passing through all working sites in the pit) accounts for the percentage of the total air intake of the mine.
10. The air leakage rate of the mine is the sum of the external air leakage rate and the internal air leakage rate, wherein the external air leakage rate is the sum of the air leakage of the main ventilator device and the ground surface near the air shaft, and the total air inlet rate of the mine can be subtracted from the sum of the air flows of all main ventilators; the external air leakage rate is the ratio of the external air leakage rate to the sum of the air volumes of all main ventilators; the effective air quantity can be subtracted from the total air quantity of the mine, and the internal air leakage rate refers to the percentage of underground air leakage quantity to the working air quantity of the ventilator.
11. The main ventilator capacity reserve coefficient reserves the ratio of the reserve air supply quantity to the actual air quantity required by the mine for the main ventilator.
12. And respectively calculating the reliability coefficient of each air duct, multiplying the reliability coefficient of each air duct by the reliability weight of each air duct, and summing the reliability coefficients to obtain the reliability coefficient of the mine ventilation system. And finally, calculating the reliability coefficient of the mine ventilation system by respectively calculating the reliability coefficient of each air duct, thereby providing a basis for the judgment result.
13. And respectively calculating the controllability coefficients of all the air-using air channels, multiplying the controllability coefficients of all the air-using air channels by the weight of the controllability coefficients of all the air-using air channels, and summing the obtained products to obtain the controllability coefficients of the mine ventilation system. And (5) calculating the controllability coefficient of the mine ventilation system to give a judgment basis. For example: assuming M independent cells are provided, and M1 independent cells are provided with adjusting points, the controllability coefficient estimation is M1/M.
14. The testability coefficient of the ventilation system is (M1-M2)/M, wherein the M independent meshes are provided with M1 meshes with measuring points, the wind speed, the temperature and the like can be measured, and the M2 measuring points are inaccurate due to the field condition.
Step S203, searching in a standard reference range according to the ventilation index evaluation value to obtain an evaluation result corresponding to each ventilation index; the evaluation results of the evaluation values of the respective ventilation indexes are obtained according to the standard reference ranges provided in table 1, and as shown in table 3, the evaluation results correspond to pass, basic pass, and to be rectified. The standard reference range can be changed according to the specific situation, for example, the qualification range is [0.8,1], the basic qualification range is [0.6,0.8 ], and the range to be modified is [0,0.6 ] in table 1.
TABLE 3 Table 3
Step S204, calculating and obtaining a scoring value corresponding to each ventilation index according to the evaluation result; score value q i And (3) representing.
Determining the score q by combining the evaluation value conditions of various indexes of the mine i As shown in table 5, the following illustrates the determination of standard reference ranges according to:
firstly, the standard reference range is determined according to a conventional judging mode, wherein 60 minutes (0.6) are normally defined and ruled lines;
secondly, it is also a precondition for the definition of the calculation result, and it is understood that this is a definition, and the final solution result is also evaluated by using the definition. That is, if the qualification range is defined as [0.9,1], and the basic qualification range is [0.8,0.9), the individual qi is valued according to the standard, and if the final result solved by the comprehensive evaluation method is 0.85, the basic qualification is determined.
q i The basis of the value is:
the values of all indexes in the ventilation index system are values of a control interval range generally by adopting an interval discrimination method, but all the values do not belong to linear recursion, cannot be simply represented by percentage or calculated score, and belong to the concept of fuzzy mathematics. For example, the index name is 'air quantity supply and demand ratio of the wind-using place'
Table four
(1) If the air supply and demand ratio of the air consumption place is more than or equal to 1.2, the index evaluation value is qualified when the air supply and demand ratio of the air consumption place is 1.3, but 0.83 or 0.91? The method can not be directly solved by a calculation formula, and only the definition of the involution range is satisfied and is between 0.8 and 1, so that 0.83 and 0.91 can be taken, and the influence on the comprehensive score is small.
(2) How to better define this value to be 0.83 or 0.91 woolen can be solved by adopting a method of scoring the comprehensive score by multiple persons. Multiple wells may be considered in combination, preferably 1.35, with a 1.3 ratio closer to 1.35 favoring more than 90 minutes, preferably 0.91,0.95.
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TABLE 5
Step S205, substituting the scoring value into a judgment formula to calculate and obtain a judgment result, wherein the judgment formula is as follows:
wherein F is the judgment result, q i A score value for each index.
Substituting the scoring values in table 4 into the formula is as follows:
the invention provides a reliability judging system of a mine ventilation system, which comprises at least one processor, wherein the processor is used for judging the reliability of the mine ventilation system; and a memory communicatively coupled to the at least one processor; wherein the memory stores instructions executable by the one processor, the instructions being executable by the at least one processor to enable the at least one processor to:
determining a plurality of ventilation indexes and acquiring standard reference ranges corresponding to different ventilation indexes;
acquiring a ventilation index evaluation value corresponding to the mine aiming at each ventilation index;
searching and obtaining an evaluation result corresponding to each ventilation index in a standard reference range according to the ventilation index evaluation value;
calculating a scoring value corresponding to each ventilation index according to the evaluation result;
substituting the scoring value into a judgment formula to calculate to obtain a judgment result, wherein the judgment formula is as follows:
wherein F is the judgment result, q i A score value for each index.
The embodiment solves the technical problems that in the prior art, the mine ventilation management still continues to be mainly based on qualitative analysis and experience management, and unified standards, rules and specifications are not available, and the evaluation method for the reliability of the mine ventilation system provided by the embodiment can provide scientific evaluation results for mine ventilation conditions and gives consideration to a plurality of mine ventilation index systems such as reliability, controllability and testability of a mine ventilation network.
What has been described above is merely illustrative of the principles and preferred embodiments of the present invention. It should be noted that several other variants are possible to those skilled in the art on the basis of the principle of the invention and should also be considered as the scope of protection of the present invention.
Claims (11)
1. The method for judging the reliability of the mine ventilation system is characterized by comprising the following steps of:
determining a plurality of ventilation indexes and acquiring standard reference range tables corresponding to different ventilation indexes;
acquiring a ventilation index evaluation value corresponding to the mine aiming at each ventilation index;
searching in a standard reference range table according to the ventilation index evaluation value to obtain an evaluation result corresponding to each ventilation index;
calculating to obtain a scoring value corresponding to each ventilation index by adopting a fuzzy mathematical method according to the evaluation result: if the evaluation result is qualified, the grading value is more than or equal to 0.8 and less than or equal to 1; if the evaluation result is basically qualified, the grading value is more than or equal to 0.6 and less than 0.8; if the evaluation result is to be modified, the grading value is more than or equal to 0 and less than 0.6;
substituting the scoring value into a judgment formula to calculate to obtain a judgment result, wherein the judgment formula is as follows:
，
wherein F is the result of the judgment,a score value for each index.
2. The method for evaluating the reliability of a mine ventilation system as claimed in claim 1, wherein,
the ventilation indexes comprise: the air quantity supply and demand ratio of the air utilization place, the number of the angle joints with unstable air flow of the air utilization area, the number of independent meshes of a mine ventilation network, the ratio of the angle joints of the mine ventilation network to the total number of branches, the equal-area holes of mine ventilation, the resistance percentage of a mine return air section, the resistance percentage of a public section and the minimum system resistance percentage, the resistance ratio of a maximum air well system to a minimum air well system, the effective air quantity rate of a mine, the air leakage rate of the mine, the standby coefficient of a main ventilator capability, the reliability coefficient of a mine ventilation system, the controllability coefficient of the mine ventilation system and/or the testability coefficient of the mine ventilation system.
3. The method for evaluating the reliability of a mine ventilation system as claimed in claim 1, wherein,
the air quantity supply-demand ratio of the air consumption site is obtained by calculating the ratio of the actual air quantity to the required air quantity of the air consumption site.
4. The method for evaluating the reliability of a mine ventilation system as claimed in claim 1, wherein,
the independent mesh number of the mine ventilation network is the number of independent meshes formed after the air duct is removed from the total air duct;
and giving a judging result according to the number of the air channels and the number of independent meshes of the mine ventilation network, wherein the judging result comprises qualification, basic qualification and to-be-rectified.
5. The method for evaluating the reliability of a mine ventilation system as claimed in claim 4, wherein,
when the number of the air channels is more than or equal to 10 and less than 20, the independent mesh number of the mine ventilation network is judged to be qualified when the number of the independent mesh number of the mine ventilation network is less than 20, when the number of the independent mesh number of the mine ventilation network is more than or equal to 20 and less than 30, the independent mesh number of the mine ventilation network is judged to be basically qualified, and when the number of the independent mesh number of the mine ventilation network is more than or equal to 30, the independent mesh number of the mine ventilation network is judged to be corrected;
when the number of the air channels is smaller than 10, the independent mesh number of the mine ventilation network is judged to be qualified when the number of the independent mesh number of the mine ventilation network is smaller than 10, when the number of the independent mesh number of the mine ventilation network is larger than or equal to 10 and smaller than 20, the independent mesh number of the mine ventilation network is judged to be basically qualified, and when the number of the independent mesh number of the mine ventilation network is larger than or equal to 20, the independent mesh number of the mine ventilation network is judged to be changed;
when the number of the air channels is greater than or equal to 20, the independent mesh number of the mine ventilation network is judged to be qualified when the number of the independent mesh number of the mine ventilation network is less than 30, when the number of the independent mesh number of the mine ventilation network is greater than or equal to 30 and less than 40, the independent mesh number of the mine ventilation network is judged to be basically qualified, and when the number of the independent mesh number of the mine ventilation network is greater than or equal to 40, the independent mesh number of the mine ventilation network is judged to be corrected.
6. The method for evaluating the reliability of a mine ventilation system as claimed in claim 1, wherein,
and obtaining the angle branch number through the ventilation network diagram, and obtaining the ratio of the mine ventilation network angle branch number to the total branch number by comparing the angle branch number with the total branch number.
7. The method for evaluating the reliability of a mine ventilation system as claimed in claim 1, wherein,
when the air pressure is Pa, the equal volume Kong Dengyu 1.19.19Q of mine ventilation Ore ore Divided by；
When the wind pressure is mmH2O manufactured by engineering units, the equal volume Kong Dengyu 0.38.38Q of mine ventilation Ore ore Divided byWherein Q is Ore ore Represents the total exhaust air quantity of main ventilator of mine>Representing the ventilation resistance of the mine.
8. The method for evaluating the reliability of a mine ventilation system as claimed in claim 1, wherein,
and accumulating wind resistances distributed on the wind utilization line to obtain a total resistance value, and obtaining the resistance of the return air section, wherein the ratio of the resistance of the return air section to the total resistance value is the percentage of the resistance of the return air section of the mine.
9. The method for evaluating the reliability of a mine ventilation system as claimed in claim 1, wherein,
and respectively calculating the reliability coefficient of each air duct, multiplying the reliability coefficient of each air duct by the reliability weight of each air duct, and summing the reliability coefficients to obtain the reliability coefficient of the mine ventilation system.
10. The method for evaluating the reliability of a mine ventilation system according to any one of claims 1 to 9, wherein,
and respectively calculating the controllability coefficients of all the air-using air channels, multiplying the controllability coefficients of all the air-using air channels by the weight of the controllability coefficients of all the air-using air channels, and summing the obtained products to obtain the controllability coefficients of the mine ventilation system.
11. A system for evaluating the reliability of a mine ventilation system, comprising at least one processor; and a memory communicatively coupled to the at least one processor; wherein the memory stores instructions executable by the at least one processor to enable the at least one processor to:
determining a plurality of ventilation indexes and acquiring standard reference range tables corresponding to different ventilation indexes;
acquiring a ventilation index evaluation value corresponding to the mine aiming at each ventilation index;
searching in a standard reference range table according to the ventilation index evaluation value to obtain an evaluation result corresponding to each ventilation index;
calculating to obtain a scoring value corresponding to each ventilation index by adopting a fuzzy mathematical method according to the evaluation result: if the evaluation result is qualified, the grading value is more than or equal to 0.8 and less than or equal to 1; if the evaluation result is basically qualified, the grading value is more than or equal to 0.6 and less than 0.8; if the evaluation result is to be modified, the grading value is more than or equal to 0 and less than 0.6;
substituting the scoring value into a judgment formula to calculate to obtain a judgment result, wherein the judgment formula is as follows:
，
wherein F is the result of the judgment,a score value for each index.
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