CN113027526A - Method and system for evaluating reliability of mine ventilation system - Google Patents
Method and system for evaluating reliability of mine ventilation system Download PDFInfo
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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 in a standard reference range according to the ventilation index evaluation value to obtain an evaluation result corresponding to each ventilation index; calculating to obtain a score value corresponding to each ventilation index according to the evaluation result; and substituting the evaluation value into an evaluation formula to calculate to obtain an evaluation result. The method for evaluating the reliability of the mine ventilation system solves the technical problems that the mine ventilation management in the prior art still continues to be mainly based on qualitative analysis and experience management, and has no unified standard, rule and specification.
Description
Technical Field
The invention relates to the field of coal mines, in particular to a method and a system for judging the 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, during the production process of the mine, the ground air must be continuously conveyed to various underground operation sites to supply personnel with breathing, dilute and remove various underground harmful gases and mine dust, create good mine climatic conditions and ensure the health and labor safety of the underground operation personnel. This shows how important a mine ventilation system is in the underground mining industry.
Along with the continuous expansion of the mining depth and range of the mine, the structure of a ventilation network is gradually complicated, the difficulty of the mine ventilation problem is increased, and the solution of the problems depends on the application of basic scientific theory and new technology. The development trend of the existing mine ventilation technology is to modernize the building and operation of an oversize high-yield high-efficiency mine, and the automation, the intellectualization and the unmanned realization of the mine ventilation are gradually realized. At present, the domestic mine ventilation management still continues to adopt a method mainly based on 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 evaluating the reliability of a mine ventilation system, which solve the technical problems that the mine ventilation management in the prior art is still continued to be mainly based on qualitative analysis and experience management, and no unified standard, rule and specification exists.
The invention provides a method for judging the 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 in a standard reference range according to the ventilation index evaluation value to obtain an evaluation result corresponding to each ventilation index;
calculating to obtain a score value corresponding to each ventilation index according to the evaluation result;
substituting the evaluation value into an evaluation formula to calculate to obtain an evaluation result, wherein the evaluation formula is as follows:
wherein F is the result of the evaluation, qiIs the value of the score of each index.
Further, the ventilation index includes: the method comprises the following steps of utilizing the air quantity supply-demand ratio of an air place, utilizing the number of angle connection branches with unstable air flow of an air area, utilizing the number of independent mesh holes of a mine ventilation network, utilizing the ratio of the number of angle connection branches of the mine ventilation network to the total number of branches, utilizing the cumulative holes of mine ventilation and the like, utilizing the resistance percentage of a mine air return section, utilizing the resistance percentage of a common section to the minimum system resistance percentage, utilizing the maximum to the minimum air well system resistance ratio, utilizing the effective air quantity rate of a mine, utilizing the air leakage rate of the mine, utilizing the spare coefficient of the capacity of a main ventilator, utilizing the reliability coefficient of a mine ventilation system, utilizing the.
In addition, the air quantity supply-demand ratio of the wind utilization point is obtained by calculating the ratio of the actual air supply quantity and the air demand quantity of the wind utilization point.
In addition, the number of the independent meshes of the mine ventilation network is the number of the independent meshes formed by removing the air channels from the total air channels;
and giving out a judgment result according to the number of the air ducts and the number of the independent meshes of the mine ventilation network, wherein the judgment 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 less than 20, the mine ventilation network is judged to be qualified, when the independent mesh number of the mine ventilation network is more than or equal to 20 and less than 30, the mine ventilation network is judged to be basically qualified, and when the independent mesh number of the mine ventilation network is more than or equal to 30, the mine ventilation network is judged to be rectified and improved;
when the number of the air channels is less than 10, the number of the independent mesh holes of the mine ventilation network is less than 10, the mine ventilation network is judged to be qualified, when the number of the independent mesh holes of the mine ventilation network is more than or equal to 10 and less than 20, the mine ventilation network is judged to be basically qualified, and when the number of the independent mesh holes of the mine ventilation network is more than or equal to 20, the mine ventilation network is judged to be rectified and modified;
when the number of the air channels is more than or equal to 20, the number of the independent mesh holes of the mine ventilation network is less than 30, the mine ventilation network is judged to be qualified, when the number of the independent mesh holes of the mine ventilation network is more than or equal to 30 and less than 40, the mine ventilation network is judged to be basically qualified, and when the number of the independent mesh holes of the mine ventilation network is more than or equal to 40, the mine ventilation network is judged to be rectified and modified.
In addition, the angular connection branch number is obtained through the ventilation network diagram, and the ratio of the angular connection branch number to the total number of the branches is obtained through the ratio of the angular connection branch number to the total number of the branches.
In addition, when the wind pressure adopts the international system Pa, the equivalent pore volume of mine ventilation is equal to 1.19QMineIs divided by
When the wind pressure adopts the mmH2O manufactured by engineering units, the equal-volume hole of mine ventilation is equal to 0.38QMineIs divided by
In addition, the wind resistances distributed on the wind utilization line are accumulated to obtain a total resistance value, the resistance of the air return section is obtained, and the ratio of the resistance of the air return section to the total resistance value is the percentage of the resistance of the air return section of the mine.
In addition, the reliability coefficients of all the air channels are calculated respectively, and the reliability coefficients of all the air channels are multiplied by the reliability weights of all the air channels and then summed to form the reliability coefficient of the mine ventilation system.
In addition, the controllability coefficients of all the air consumption channels are respectively calculated, and the controllability coefficients of all the air consumption channels are multiplied by the controllability coefficient weights of all the air consumption channels and then summed to be the controllability coefficient 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 to cause 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 in a standard reference range according to the ventilation index evaluation value to obtain an evaluation result corresponding to each ventilation index;
calculating to obtain a score value corresponding to each ventilation index according to the evaluation result;
substituting the evaluation value into an evaluation formula to calculate to obtain an evaluation result, wherein the evaluation formula is as follows:
wherein F is the result of the evaluation, qiIs the value of the score of each index.
Through adopting above-mentioned technical scheme, have following beneficial effect:
the method for evaluating the reliability of the mine ventilation system solves the technical problems that the mine ventilation management in the prior art still continues to be mainly based on qualitative analysis and experience management, and has no unified standard, rule and specification.
Drawings
FIG. 1 is a flow chart of a method for assessing reliability of a mine ventilation system according to one embodiment of the present invention;
fig. 2 is a flow chart of a method for evaluating reliability of a mine ventilation system according to an embodiment of the present invention.
Detailed Description
The present invention is described in further detail below with reference to specific embodiments and the attached drawings. It is intended that the present invention not be limited to the particular embodiments disclosed, but that the present invention be limited only by 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, acquiring a ventilation index evaluation value corresponding to the mine aiming at each ventilation index;
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 to obtain a score value corresponding to each ventilation index according to the evaluation result;
step S005, substituting the evaluation value into an evaluation formula to calculate to obtain an evaluation result, wherein the evaluation formula is as follows:
wherein F is the result of the evaluation, qiIs the value of the score of each index.
In the prior art, because the management of mine ventilation still continues to be a method mainly based on qualitative analysis and experience management, and no unified standard, rule and specification exists, a mine ventilation index system which mainly comprises air volume, air pressure, equal-volume holes, a maximum resistance route, resistance distribution, an effective air volume rate, a mine air leakage rate and the running efficiency of a main ventilator, comprehensively considers the reliability, controllability and testability of a mine ventilation network and quantifies on a qualitative basis needs to be researched and formulated.
In the method for evaluating the reliability of the mine ventilation system, first in step S001, determining a plurality of ventilation indexes and acquiring standard reference ranges corresponding to different ventilation indexes, for example, the ventilation indexes may select the air quantity supply-demand ratio of the wind utilization place, the number of angle joint branches with unstable wind flow in the wind utilization area, the number of independent mesh holes of the mine ventilation network, the ratio of the number of angle joint branches of the mine ventilation network to the total number of branches, the equal-volume holes of the mine ventilation, the percentage of resistance of the mine air return section, the percentage of resistance of the common section to the minimum system resistance, the ratio of the maximum to minimum air shaft system resistances, the effective air quantity rate of the mine, the air leakage rate of the mine, the backup coefficient of the main ventilator capacity, 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:
TABLE 1
The specific conditions for evaluating the mine ventilation system are classified as qualified, basically qualified and to be rectified and improved.
Alternatively, the score q for each index in Table 1i(i ═ 1, 2.., 14), the value ranges of the indexes are: the qualified range is [0.8,1]]The basic acceptable range is [0.6,0.8 ], and the range to be modified is [0,0.6 ").
Step S002, acquiring a ventilation index evaluation value 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.
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 to obtain a score value corresponding to each ventilation index according to the evaluation result; the score value is qvAnd (4) showing.
Step S005, substituting the evaluation value into an evaluation formula to calculate to obtain an evaluation result, wherein the evaluation formula is as follows:
wherein F is the result of the evaluation, qiIs the value of the score of each index.
The method for evaluating the reliability of the mine ventilation system 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 no unified standard, rule and specification exists, can give a scientific evaluation result to the mine ventilation condition, and gives consideration to a plurality of mine ventilation index systems such as the reliability, controllability and testability of a mine ventilation network.
In one embodiment thereof, the ventilation indicators include: the method comprises the following steps of utilizing the air quantity supply-demand ratio of an air place, utilizing the number of angle connection branches with unstable air flow of an air area, utilizing the number of independent mesh holes of a mine ventilation network, utilizing the ratio of the number of angle connection branches of the mine ventilation network to the total number of branches, utilizing the cumulative holes of mine ventilation and the like, utilizing the resistance percentage of a mine air return section, utilizing the resistance percentage of a common section to the minimum system resistance percentage, utilizing the maximum to the minimum air well system resistance ratio, utilizing the effective air quantity rate of a mine, utilizing the air leakage rate of the mine, utilizing the spare coefficient of the capacity of a main ventilator, utilizing the reliability coefficient of a mine ventilation system, utilizing the. Through the ventilation indexes, the ventilation condition of the mine can be accurately and scientifically judged.
In one embodiment, the air quantity supply-demand ratio of the wind utilization point is obtained by calculating the ratio of the actual air supply quantity to the air demand quantity of the wind utilization point. Firstly, the ratio of the actual air supply quantity to the air demand quantity of each air consumption point is calculated, if the air supply-demand ratio of a certain air duct cannot meet the requirement, the air duct needs to be modified, and meanwhile, the total air supply-demand ratio of the whole mine needs to be calculated to serve as one of the evaluation indexes of the whole mine.
In one embodiment, the number of the independent meshes of the mine ventilation network is the number of the independent meshes formed by removing the air duct from the total air duct;
and giving out a judgment result according to the number of the air ducts and the number of the independent meshes of the mine ventilation network, wherein the judgment result comprises qualification, basic qualification and to-be-rectified. Through the index of the number of the independent mesh openings of the mine ventilation network, whether the air ducts are qualified or not and the specific grade can be judged by combining the number of the air ducts.
In one embodiment, when the number of the air channels is greater than or equal to 10 and less than 20, the number of the independent mesh holes of the mine ventilation network is judged to be qualified, when the number of the independent mesh holes of the mine ventilation network is greater than or equal to 20 and less than 30, the mine ventilation network is judged to be basically qualified, and when the number of the independent mesh holes of the mine ventilation network is greater than or equal to 30, the mine ventilation network is judged to be rectified;
when the number of the air channels is less than 10, the number of the independent mesh holes of the mine ventilation network is less than 10, the mine ventilation network is judged to be qualified, when the number of the independent mesh holes of the mine ventilation network is more than or equal to 10 and less than 20, the mine ventilation network is judged to be basically qualified, and when the number of the independent mesh holes of the mine ventilation network is more than or equal to 20, the mine ventilation network is judged to be rectified and modified;
when the number of the air channels is more than or equal to 20, the number of the independent mesh holes of the mine ventilation network is less than 30, the mine ventilation network is judged to be qualified, when the number of the independent mesh holes of the mine ventilation network is more than or equal to 30 and less than 40, the mine ventilation network is judged to be basically qualified, and when the number of the independent mesh holes of the mine ventilation network is more than or equal to 40, the mine ventilation network is judged to be rectified and modified. By giving specific values and gradations, the judgment is made easier.
In one embodiment, the angular union branch number is obtained through a ventilation network diagram, and the ratio of the angular union branch number to the total number of branches is obtained to obtain the ratio of the angular union branch number to the total number of branches of the mine ventilation network. The ratio of the angular connection branch number to the total branch number of the mine ventilation network is obtained by calculating the ratio of the angular connection branch number to the total branch number,
in one embodiment, when the wind pressure adopts the international system Pa, the equivalent pore volume of mine ventilation is equal to 1.19QMineIs divided by
Q represents the total air discharge quantity of the main ventilator of the mine, the unit is cubic meter per second, the subscript mine represents the mine,
representing the ventilation resistance of the mine.
When the wind pressure adopts the mmH2O manufactured by engineering units, the equal-volume hole of mine ventilation is equal to 0.38QMineIs divided by
In order to facilitate different unit systems, algorithms of mine ventilation equal-area holes corresponding to the two unit systems are provided.
In one embodiment, the total resistance value is obtained by accumulating the wind resistance distributed on the wind utilization line, and the air return section resistance value is obtained, and the ratio of the air return section resistance value to the total resistance value is the percentage of the mine air return section resistance value.
The ventilation network is divided into an air inlet area, an air utilization area and an air return area according to different functional groups, and the air channels of the special air utilization areas are also defined as air utilization channels. And then, carrying out resistance value accumulation analysis on the wind resistances distributed in three areas on each wind using line, analyzing to obtain the total resistance values of the air inlet area, the wind using area and the air return area, and calculating the ratio of the resistance value of the air return section to the total resistance value as the percentage of the resistance value of the air return section of the mine.
In one embodiment, the reliability coefficients of the air ducts are calculated respectively, and the reliability coefficients of the air ducts are multiplied by the reliability weights of the air ducts 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 judging results.
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 controllability coefficient weights of the air ducts and then summed to form the controllability coefficient of the mine ventilation system. And (4) giving judgment basis by calculating the controllability coefficient of the mine ventilation system.
Referring to fig. 2, the invention provides a method for evaluating reliability of a mine ventilation system, which comprises the following steps:
step S201, determining a plurality of ventilation indexes and acquiring standard reference ranges corresponding to different ventilation indexes.
Step S202, acquiring a ventilation index evaluation value 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.
As shown in table 2, the index name of the ventilation index and the ventilation index evaluation value are managed by a table. The ventilation index evaluation value is abbreviated as an evaluation value in the table.
TABLE 2
The ventilation indexes include: the method comprises the following steps of utilizing the air quantity supply-demand ratio of an air place, utilizing the number of angle connection branches with unstable air flow of an air area, utilizing the number of independent mesh holes of a mine ventilation network, utilizing the ratio of the number of angle connection branches of the mine ventilation network to the total number of branches, utilizing the cumulative holes of mine ventilation and the like, utilizing the resistance percentage of a mine air return section, utilizing the resistance percentage of a common section to the minimum system resistance percentage, utilizing the maximum to the minimum air well system resistance ratio, utilizing the effective air quantity rate of a mine, utilizing the air leakage rate of the mine, utilizing the spare coefficient of the capacity of a main ventilator, utilizing the reliability coefficient of a mine ventilation system, utilizing the. Through the ventilation indexes, the ventilation condition of the mine can be accurately and scientifically judged.
1. And the air quantity supply-demand ratio of the wind using place is obtained by calculating the ratio of the actual air supply quantity and the air demand quantity of the wind using place. Firstly, the ratio of the actual air supply quantity to the air demand quantity of each air consumption point is calculated, if the air supply-demand ratio of a certain air duct cannot meet the requirement, the air duct needs to be modified, and meanwhile, the total air supply-demand ratio of the whole mine needs to be calculated to serve as one of the evaluation indexes of the whole mine.
2. And obtaining the number of the angle connection wind channels with unstable wind flow in the wind area through analyzing the ventilation network diagram.
3. The number of the independent meshes of the mine ventilation network is the number of the independent meshes formed by removing the air channels for air from the total air channels;
and giving out a judgment result according to the number of the air ducts and the number of the independent meshes of the mine ventilation network, wherein the judgment result comprises qualification, basic qualification and to-be-rectified. Through the index of the number of the independent mesh openings of the mine ventilation network, whether the air ducts are qualified or not and the specific grade can be judged by combining the number of the air ducts.
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 less than 20, the mine ventilation network is judged to be qualified, when the independent mesh number of the mine ventilation network is more than or equal to 20 and less than 30, the mine ventilation network is judged to be basically qualified, and when the independent mesh number of the mine ventilation network is more than or equal to 30, the mine ventilation network is judged to be rectified and improved;
when the number of the air channels is less than 10, the number of the independent mesh holes of the mine ventilation network is less than 10, the mine ventilation network is judged to be qualified, when the number of the independent mesh holes of the mine ventilation network is more than or equal to 10 and less than 20, the mine ventilation network is judged to be basically qualified, and when the number of the independent mesh holes of the mine ventilation network is more than or equal to 20, the mine ventilation network is judged to be rectified and modified;
when the number of the air channels is more than or equal to 20, the number of the independent mesh holes of the mine ventilation network is less than 30, the mine ventilation network is judged to be qualified, when the number of the independent mesh holes of the mine ventilation network is more than or equal to 30 and less than 40, the mine ventilation network is judged to be basically qualified, and when the number of the independent mesh holes of the mine ventilation network is more than or equal to 40, the mine ventilation network is judged to be rectified and modified. By giving specific values and gradations, the judgment is made easier.
4. And obtaining the number of angle joint branches through the ventilation network graph, and obtaining the ratio of the number of angle joint branches to the total number of branches of the mine ventilation network by comparing the number of angle joint branches with the total number of branches. The ratio of the angular connection branch number to the total branch number of the mine ventilation network is obtained by calculating the ratio of the angular connection branch number to the total branch number,
5. when the wind pressure adopts the international system Pa, the equivalent pore volume of mine ventilation is equal to 1.19QMineIs divided by
When the wind pressure adopts the mmH2O manufactured by engineering units, the equal-volume hole of mine ventilation is equal to 0.38QMineIs divided by
In order to facilitate different unit systems, algorithms of mine ventilation equal-area holes corresponding to the two unit systems are provided.
6. And accumulating the wind resistances distributed on the wind utilization line to obtain a total resistance value, and obtaining the resistance of the air return section, wherein the ratio of the resistance of the air return section to the total resistance value is the percentage of the resistance of the air return section of the mine.
The ventilation network is divided into an air inlet area, an air utilization area and an air return area according to different functional groups, and the air channels of the special air utilization areas are also defined as air utilization channels. And then, carrying out resistance value accumulation analysis on the wind resistances distributed in three areas on each wind using line, analyzing to obtain the total resistance values of the air inlet area, the wind using area and the air return area, and calculating the ratio of the resistance value of the air return section to the total resistance value as the percentage of the resistance value of the air return section of the mine.
7. Percent common segment resistance to minimum system resistance: the common section resistance refers to the sum of the resistances of the common air inlet section (total air inlet section) and the common air return section (total air return section).
The minimum system resistance is: the resistance of the whole mine is realized for a single air return shaft, and the minimum system resistance is realized for a plurality of air shafts.
8. And calculating the ratio of the maximum air shaft system resistance to the minimum air shaft system resistance for a system with a plurality of air shafts.
9. Mine effective air volume rate: the effective air volume of the mine (which refers to the sum of the actual air volume of the air flow passing through each underground working site) accounts for the percentage of the total air intake volume of the mine.
10. The mine air leakage rate is the sum of the external air leakage rate and the internal air leakage rate, 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 intake of the mine can be subtracted from the sum of the air flows of the main ventilators; the external air leakage rate is the ratio of the external air leakage rate to the sum of the air flow of each main ventilator; the effective air quantity can be subtracted from the total air inlet quantity of the mine, and the internal air leakage rate refers to the percentage of the underground air leakage quantity in the working air quantity of the ventilator.
11. The spare coefficient of the main ventilator capacity is the ratio of the reserved spare air supply volume of the main ventilator to the actual air volume required by the mine.
12. And respectively calculating the reliability coefficient of each air duct, and summing the reliability coefficients of the air ducts multiplied by the reliability weights of the air ducts 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 judging results.
13. And respectively calculating the controllability coefficients of the air consumption channels, and summing the controllability coefficients of the air consumption channels multiplied by the controllability coefficient weights of the air consumption channels to obtain the controllability coefficients of the mine ventilation system. And (4) giving judgment basis by calculating the controllability coefficient of the mine ventilation system. For example: assuming that there are M independent meshes and there are M1 independent meshes with adjustment points, the controllability coefficient is estimated to be M1/M.
14. The testability coefficient of the ventilation system is (M1-M2)/M, if M independent meshes are provided, M1 meshes with measuring points on the M independent meshes can measure wind speed, temperature and the like, and M2 measuring points have the condition of inaccurate measurement 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 ventilation indexes are obtained according to the standard reference ranges provided in table 1, and as shown in table 3, the evaluation results are correspondingly qualified, basically qualified, and to be modified. The standard reference range may be modified according to specific conditions, for example, the acceptable range in table 1 is [0.8,1], the basic acceptable range is [0.6,0.8 ], and the range to be modified is [0, 0.6).
TABLE 3
Step S204, calculating to obtain a score value corresponding to each ventilation index according to the evaluation result; the score value is qiAnd (4) showing.
Determining a score q by combining evaluation value conditions of various indexes of the mineiAs shown in table 5, the basis for determining the standard reference range is described below:
firstly, the standard reference range is determined according to a conventional discrimination mode, generally 60 points (0.6) are appointed and ruled lines;
secondly, it is also a precondition for the definition of the calculation result, which can be understood as a definition, and the final solution result can be judged by applying the definition. That is, if the qualified range is defined as [0.9,1] and the basic qualified range is [0.8,0.9), then each qi is taken according to the standard, and if the final result solved by the comprehensive evaluation method is 0.85, the final result is determined as the basic qualified.
qiThe value is taken according to the following steps:
because the values of each index in the ventilation index system are values in a control interval range by adopting an interval discrimination method, the values do not belong to linear recursion, cannot be simply represented by percentage or calculation value, and belong to the concept of fuzzy mathematics. For example, the index name "air quantity supply and demand ratio at wind site"
Watch four
(1) If the air quantity supply-demand ratio at the wind-using site is defined as ≥ 1.2, then if the air quantity supply-demand ratio at the wind-using site is 1.3, the index evaluation value is qualified, but 0.83 or 0.91? The method cannot be directly solved by a calculation formula, and the definition of the acceptable range is only between 0.8 and 1, so that the method can be taken as 0.83 and 0.91, and the influence on the comprehensive score is small.
(2) How to better define the value to be 0.83 or 0.91 can be solved by adopting a multi-user scoring comprehensive scoring method. Multiple wells can be considered, preferably 1.35, and 1.3 closer to 1.35 is preferred to be over 90 points, and data such as 0.91,0.95 can be taken.
TABLE 5
Step S205, substituting the evaluation value into an evaluation formula to calculate to obtain an evaluation result, wherein the evaluation formula is as follows:
wherein F is the result of the evaluation, qiIs the value of the score of each index.
Substituting the score values in table 4 into the formula is as follows:
the invention provides a system for judging the reliability of a 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 to cause 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 in a standard reference range according to the ventilation index evaluation value to obtain an evaluation result corresponding to each ventilation index;
calculating to obtain a score value corresponding to each ventilation index according to the evaluation result;
substituting the evaluation value into an evaluation formula to calculate to obtain an evaluation result, wherein the evaluation formula is as follows:
wherein F is the result of the evaluation, qiIs the value of the score of each index.
The method for evaluating the reliability of the mine ventilation system 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 no unified standard, rule and specification exists, can give a scientific evaluation result to the mine ventilation condition, and gives consideration to a plurality of mine ventilation index systems such as the reliability, controllability and testability of a mine ventilation network.
The foregoing is considered as illustrative only of the principles and preferred embodiments of the invention. It should be noted that, for those skilled in the art, several other modifications can be made on the basis of the principle of the present invention, and the protection scope of the present invention should be regarded.
Claims (11)
1. A method for judging the reliability of a mine ventilation system is characterized by comprising 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 in a standard reference range according to the ventilation index evaluation value to obtain an evaluation result corresponding to each ventilation index;
calculating to obtain a score value corresponding to each ventilation index according to the evaluation result;
substituting the evaluation value into an evaluation formula to calculate to obtain an evaluation result, wherein the evaluation formula is as follows:
wherein F is the result of the evaluation, qiIs the value of the score of each index.
2. The method of claim 1,
the ventilation indexes include: the method comprises the following steps of utilizing the air quantity supply-demand ratio of an air place, utilizing the number of angle connection branches with unstable air flow of an air area, utilizing the number of independent mesh holes of a mine ventilation network, utilizing the ratio of the number of angle connection branches of the mine ventilation network to the total number of branches, utilizing the cumulative holes of mine ventilation and the like, utilizing the resistance percentage of a mine air return section, utilizing the resistance percentage of a common section to the minimum system resistance percentage, utilizing the maximum to the minimum air well system resistance ratio, utilizing the effective air quantity rate of a mine, utilizing the air leakage rate of the mine, utilizing the spare coefficient of the capacity of a main ventilator, utilizing the reliability coefficient of a mine ventilation system, utilizing the.
3. The method of claim 1,
and the air quantity supply-demand ratio of the wind using place is obtained by calculating the ratio of the actual air supply quantity and the air demand quantity of the wind using place.
4. The method of claim 1,
the number of the independent meshes of the mine ventilation network is the number of the independent meshes formed by removing the air channels for air from the total air channels;
and giving out a judgment result according to the number of the air ducts and the number of the independent meshes of the mine ventilation network, wherein the judgment result comprises qualification, basic qualification and to-be-rectified.
5. The method of 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 less than 20, the mine ventilation network is judged to be qualified, when the independent mesh number of the mine ventilation network is more than or equal to 20 and less than 30, the mine ventilation network is judged to be basically qualified, and when the independent mesh number of the mine ventilation network is more than or equal to 30, the mine ventilation network is judged to be rectified and improved;
when the number of the air channels is less than 10, the number of the independent mesh holes of the mine ventilation network is less than 10, the mine ventilation network is judged to be qualified, when the number of the independent mesh holes of the mine ventilation network is more than or equal to 10 and less than 20, the mine ventilation network is judged to be basically qualified, and when the number of the independent mesh holes of the mine ventilation network is more than or equal to 20, the mine ventilation network is judged to be rectified and modified;
when the number of the air channels is more than or equal to 20, the number of the independent mesh holes of the mine ventilation network is less than 30, the mine ventilation network is judged to be qualified, when the number of the independent mesh holes of the mine ventilation network is more than or equal to 30 and less than 40, the mine ventilation network is judged to be basically qualified, and when the number of the independent mesh holes of the mine ventilation network is more than or equal to 40, the mine ventilation network is judged to be rectified and modified.
6. The method of claim 1,
and obtaining the number of angle joint branches through the ventilation network graph, and obtaining the ratio of the number of angle joint branches to the total number of branches of the mine ventilation network by comparing the number of angle joint branches with the total number of branches.
7. The method of claim 1,
when the wind pressure adopts the international system Pa, the equivalent pore volume of mine ventilation is equal to 1.19QMineIs divided by
When the wind pressure adopts the mmH2O manufactured by engineering units, the equal-volume hole of mine ventilation is equal to 0.38QMineIs divided by
8. The method of claim 1,
and accumulating the wind resistances distributed on the wind utilization line to obtain a total resistance value, and obtaining the resistance of the air return section, wherein the ratio of the resistance of the air return section to the total resistance value is the percentage of the resistance of the air return section of the mine.
9. The method of claim 1,
and respectively calculating the reliability coefficient of each air duct, and summing the reliability coefficients of the air ducts multiplied by the reliability weights of the air ducts to obtain the reliability coefficient of the mine ventilation system.
10. The method of assessing the reliability of a mine ventilation system as claimed in any one of claims 1 to 9,
and respectively calculating the controllability coefficients of the air consumption channels, and summing the controllability coefficients of the air consumption channels multiplied by the controllability coefficient weights of the air consumption channels to obtain the controllability coefficients of the mine ventilation system.
11. A system for evaluating reliability of a mine ventilation system is characterized by comprising 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 to cause 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 in a standard reference range according to the ventilation index evaluation value to obtain an evaluation result corresponding to each ventilation index;
calculating to obtain a score value corresponding to each ventilation index according to the evaluation result;
substituting the evaluation value into an evaluation formula to calculate to obtain an evaluation result, wherein the evaluation formula is as follows:
wherein F is the result of the evaluation, qiIs the value of the score of each index.
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