Method for determining opening area by adjusting roadway air door

Abstract

The invention discloses a method for determining the opening area of an adjusting roadway air door, and relates to the technical field of mine ventilation. The method comprises the following steps that S1, the size and the installation position of the adjusting air door needing to be installed are determined; s2, the air volume needed by the roadway where the adjusting air door is installed is calculated; s3, drawing a two-dimensional CAD plane graph of the mine; s4, adopting an analogue simulation method, initially setting the maximum opening area of the adjusting air door, and simulating and calculating the air volume passing through the roadway at the position; s5, adjusting the opening area of the adjusting air door according to the air volume required by the roadway until the air volume passing through the roadway is the required air volume; s6, multiple times of simulation experiment measurement are carried out, and the opening area of the actual adjusting air door of the mine is adjusted according to the simulation calculation result; and S7, providing a basis for setting the opening area of the mine actual adjusting air door. The method has the main advantage that the size of the opening area of the adjusting air door is determined through a three-dimensional analogue simulation method. The economical and effective design of the air volume regulation and control by the regulating air door is realized, and an effective guarantee is provided for safe production of operators.

Description

Technical Field

[0001] The invention relates to the technical field of mine ventilation, and in particular to a method for adjusting a tunnel air door to determine an opening area. Background Art

[0002] The damper is the main regulating facility in the ventilation system, which enables the ventilation system to distribute airflow as needed. Because the ventilation system is holistic, when faced with a complex ventilation network, determining the damper opening area is a complex task. How to quickly and efficiently determine the damper opening area is an important task in the air volume regulation of the ventilation system. Nowadays, the development of computer technology has provided great help for the solution of ventilation network models, and can achieve fast and accurate network solution. Using computers to calculate the opening area of ​​the damper can improve work efficiency. At present, mine ventilation theory and simulation research are relatively mature. The use of numerical simulation methods to intuitively, quickly and accurately solve practical problems in mines is an important means in the current research of mine ventilation systems. Simulation research methods can be better combined with intelligent work, thereby promoting the realization of intelligent work in mines.

[0003] In the process of determining the existing damper opening area, the existing method of determining the damper opening area mainly relies on the experience of professionals or on-site debugging. When facing a large and complex ventilation network, experience cannot guarantee accuracy, on-site debugging is time-consuming, and reliance on experience often means a lack of accurate calculation and data analysis support, so it is difficult to ensure the accuracy of the damper opening area. In addition, on-site debugging requires a lot of manpower, material resources and time, especially in large ventilation networks, the debugging process may be more complicated and time-consuming.

[0004] The method for determining the opening area of ​​the adjustable damper in the above scheme mainly relies on the experience of professionals or on-site debugging. It can be solved by using simulation software. The simulation software can determine the opening area of ​​the adjustable damper more accurately and quickly, so that the mine ventilation system can be ventilated on demand, ensuring sufficient air volume at the work site, avoiding waste of air volume, and saving energy. Summary of the invention

[0005] The purpose of the present invention is to solve the shortcomings of the prior art and to propose a method for determining the opening area of ​​an adjustable alley damper, which solves the problem of being unable to quickly and accurately obtain the opening area of ​​the adjustable damper.

[0006] In order to achieve the above object, the present invention adopts the following technical solutions:

[0007] A method for adjusting a tunnel damper to determine an opening area comprises the following steps:

[0008] S1. Determine the size and installation location of the damper to be installed;

[0009] S2. Calculate the air volume required to pass through the lane where the damper is installed;

[0010] S3. Draw a 2D CAD plan of the mine;

[0011] S4. Using simulation method, the maximum opening area of ​​the damper is initially set, and the air volume passing through the tunnel is simulated and calculated;

[0012] S5. Adjust the damper opening area according to the required air volume of the lane until the air volume passing through the lane reaches the required air volume;

[0013] S6. Conduct multiple simulation experiments and measure, and adjust the opening area of ​​the actual air damper in the mine according to the simulation results;

[0014] S7. Provide a basis for setting the actual damper opening area in the mine.

[0015] As a further improvement of the present invention, in step S1, the length, width, thickness and maximum opening area of ​​the regulating damper required for installation are determined, and the specific location where the regulating damper is installed in the underground tunnel is determined.

[0016] As a further improvement of the present invention, in step S2, the required air volume is calculated by an air volume calculation method according to the actual situation of the mine.

[0017] As a further improvement of the present invention, in step S3, the two-dimensional CAD plan view of the mine is used to establish a three-dimensional simulation model of the mine ventilation system using three-dimensional simulation software of the ventilation system.

[0018] As a further improvement of the present invention, in step S4, the simulation method is used to change the width, height and length of the alley where the regulating damper is installed, thereby replacing the width, height and thickness of the regulating damper. The regulating damper is initially set to the maximum opening area, and the air volume passing through the alley here is simulated and calculated.

[0019] As a further improvement of the present invention, in step S5, the air volume in the alley at the damper installation position adjusted by the simulation solution in step 4 is compared with the air volume required to pass through the alley, and the width of the alley is adjusted according to the size of the required air volume in the alley. After the adjustment is completed, the simulation solution is performed again, and the solution result will show that the air volume passing through the alley is the required air volume.

[0020] As a further improvement of the present invention, in step S6, the simulation solution result of step 5 is used to adjust the switch size of the actual regulating damper of the mine, the air volume passing through the tunnel is the required air volume, the cross-sectional area of ​​the tunnel is the opening area of ​​the regulating damper, and the actual regulating damper opening area is consistent with the cross-sectional area of ​​the tunnel calculated in step 5.

[0021] As a further improvement of the present invention, in step S7, according to the three-dimensional simulation result of the ventilation system in step 6, technical guidance is provided for the actual setting of the damper opening area of ​​the mine.

[0022] As a further improvement of the present invention, the three-dimensional simulation model of the mine ventilation system is established by using Vents im three-dimensional simulation software.

[0023] As a further improvement of the present invention, in step S6, the multiple simulation experiment measurements are used to facilitate the determination of an average value, and the determined average value is used to further improve the reliability of the measurement result.

[0024] Compared with the prior art, the present invention has the following beneficial effects:

[0025] 1. Through the three-dimensional simulation method, the size of the opening area of ​​the regulating damper is determined by using the three-dimensional simulation method. First, the required air volume at the work site is calculated, and the tunnel section of the local location in the model is adjusted so that the air volume at the work site meets the required air volume requirements. The section of the tunnel in the model is the opening area of ​​the regulating damper. The economic and effective design of the regulating damper for air volume control effectively avoids the inaccuracy of the opening area determined by manual experience and the poor ventilation effect at the work site. It provides effective protection for the safe production of operators and helps promote the intelligent work of mines. Through three-dimensional simulation, a realistic virtual environment can be established to simulate the operation status of the wind network, so as to comprehensively and accurately analyze the changes in the wind network. This method can take into account various complex factors, such as changes in mine production, spatial relationships in tunnels, air volume distribution requirements, etc., to ensure that the determination of the opening area of ​​the regulating damper is more accurate and reliable.

[0026] 2. Through the air volume calculation method, the required air volume of the tunnel can be accurately calculated, which can ensure that the air circulation in the tunnel meets the safety standards, effectively prevent safety hazards such as gas accumulation and coal dust flying, thereby reducing the risk of accidents such as coal dust explosions. Moreover, through the calculation results, technicians can also reasonably design the layout of the ventilation system, select appropriate ventilation equipment and adjust the damper, so as to achieve reasonable distribution and effective utilization of air volume. This can not only improve ventilation efficiency, but also reduce the energy consumption and operating costs of the ventilation system. Through air volume calculation, technicians can also more accurately understand the required air volume of the tunnel, so as to reasonably adjust the opening area of ​​the damper. This flexibility enables the ventilation system to better adapt to different production conditions and changes in the spatial relationship of the tunnel, ensuring that the ventilation effect is always maintained in the best state.

[0027] 3. Through Vents im 3D simulation software, Vents im 3D simulation software provides an intuitive and dynamic 3D visualization platform, through which technicians can intuitively observe and analyze the operating status and change trend of the ventilation system. This helps to improve the scientificity and rationality of ventilation decisions, making the decisions more in line with the actual situation and ventilation needs. Vents im 3D simulation software has powerful custom development functions, which can be customized according to the specific needs of the mine, integrating real-time data such as fan monitoring system and underground environment monitoring system. This helps to realize the intelligent management and monitoring of the ventilation system and improve the efficiency and accuracy of ventilation management. In addition, Vents im 3D simulation software has built-in economic analysis tools, which can help technicians reasonably control ventilation costs while meeting ventilation needs. By simulating the energy consumption and operating costs under different ventilation schemes, technicians can choose the most economical and reasonable ventilation scheme, thereby achieving dual optimization of ventilation effect and economic benefits.

[0028] 4. By simulating and solving the air volume and the required air volume of the tunnel, the ventilation needs of the tunnel can be accurately understood. Adjusting the tunnel width on this basis can ensure smoother air circulation in the tunnel, reduce ventilation resistance, and thus improve ventilation efficiency. This helps to ensure fresh air in the mine, reduce the concentration of harmful gases such as gas, and improve the safety production level of the mine. By simulating and comparing air volumes, technicians can more accurately understand the operating status and change trends of the tunnel ventilation system. This helps to improve the flexibility of the ventilation system so that it can better adapt to different production conditions and changes in the spatial relationship of the tunnel. When the production conditions of the mine change, technicians can adjust the tunnel width and ventilation plan in time according to the actual situation to ensure that the ventilation system is always in the best condition.

[0029] 5. By measuring the experimental data multiple times and averaging the data, multiple measurements and averaging can effectively reduce the possible errors in a single measurement, thereby improving the accuracy of the data. Through multiple measurements, we can get closer to the actual damper opening area, providing more reliable data support for subsequent analysis and decision-making. Since a single measurement may be affected by many factors, the results fluctuate. Multiple measurements and averaging can reduce this fluctuation and make the results more stable. In the process, the method of multiple measurements and averaging can improve the credibility of the results. When the results are stable and reliable, we can believe in this result more confidently and apply it to actual projects, which helps to ensure the effectiveness and reliability of the method for determining the damper opening area in actual applications. Although multiple measurements will increase some workload, this practice can improve work efficiency and reduce costs. By accurately determining the damper opening area, we can reduce energy waste and equipment loss caused by insufficient or excessive air volume. BRIEF DESCRIPTION OF THE DRAWINGS

[0030] Figure 1 It is a flow chart of the present invention.

[0031] Figure 2 It is a schematic diagram of determining the opening area of ​​the damper of the present invention in a specific implementation manner.

[0032] Figure 3 It is a schematic diagram of the Vents im three-dimensional simulation model of the present invention in a specific implementation manner. DETAILED DESCRIPTION

[0033] In order to make the above-mentioned objects, features and advantages of the present invention more obvious and easy to understand, the specific embodiments of the present invention are described in detail below in conjunction with the accompanying drawings. In the following description, many specific details are set forth to facilitate a full understanding of the present invention. However, the present invention can be implemented in many other ways different from those described herein, and those skilled in the art can make similar improvements without violating the connotation of the present invention, so the present invention is not limited by the specific implementation disclosed below.

[0034] A method for adjusting a tunnel damper to determine an opening area comprises the following steps:

[0035] S1. Determine the size and installation location of the damper to be installed.

[0036] In step S1, the length, width, thickness and maximum opening area of ​​the damper to be installed are determined, and the specific location of the damper to be installed in the underground tunnel is determined.

[0037] In step S1, the actual situation of a return air tunnel in Tongshan Copper Mine is used as the prototype. Figure 2The damper to be installed is a push-pull damper with a width of 3m, a height of 2m, a thickness of 0.1m, and a maximum opening area of ​​3m 2 The tunnel here is a three-center arch tunnel with a width of 3.6m and an arch height of 3.3m.

[0038] S2. Calculate the air volume required to pass through the alley where the damper is installed.

[0039] In step S2, the required air volume is calculated by an air volume calculation method according to the actual situation of the mine.

[0040] According to the relevant requirements for tunnel wind speed in the "Safety Regulations for Metal and Non-metal Mines" (GB16423-2020), the wind volume required to pass through the tunnel is calculated to be 35.0m 3 / s. The air volume calculation method can accurately calculate the required air volume in the tunnel, ensure that the air circulation in the tunnel meets the safety standards, effectively prevent gas accumulation, coal dust flying and other safety hazards, and thus reduce the risk of accidents such as coal dust explosions.

[0041] S3. Draw a 2D CAD plan of the mine.

[0042] In step S3, a three-dimensional simulation model of the mine ventilation system is established using the ventilation system three-dimensional simulation software according to the mine two-dimensional CAD plan. The three-dimensional simulation model of the mine ventilation system is established by Vents im three-dimensional simulation software. Through Vents im three-dimensional simulation software, Vents im three-dimensional simulation software provides an intuitive and dynamic three-dimensional visualization platform, through which technicians can intuitively observe and analyze the operating status and change trend of the ventilation system. This helps to improve the scientificity and rationality of ventilation decisions, making decisions more in line with actual conditions and ventilation needs.

[0043] In step S3, the actual situation of a tunnel in Tongshan Copper Mine is used as the prototype, and the mine ventilation system model is shown in Figure 3 . In the three-dimensional simulation software, the cross-sectional dimensions and friction coefficient of the tunnel are the measured data of the actual tunnel in the mine. The ventilation structure is consistent with the actual situation of the mine. The air volume in each location in the model is compared and adjusted with the actual detection value of the mine to ensure the consistency between the simulation model and the mine site. The three-dimensional simulation method is used to determine the size of the opening area of ​​the regulating damper. First, the required air volume at the work site is calculated, and the tunnel section of the local location in the model is adjusted so that the air volume at the work site meets the required air volume requirements. The cross-section of the tunnel in the model is the opening area of ​​the regulating damper.

[0044] S4. Using simulation method, the maximum opening area of ​​the damper is initially set, and the air volume passing through the tunnel is simulated and calculated;

[0045] S5. Adjust the damper opening area according to the required air volume of the lane until the air volume passing through the lane reaches the required air volume;

[0046] S6. Conduct multiple simulation experiments and measure, and adjust the opening area of ​​the actual air damper in the mine according to the simulation results;

[0047] S7. Provide a basis for setting the actual damper opening area in the mine.

[0048] like Figure 1 As shown, in step S4, the simulation method is used to change the width, height and length of the alley where the damper is installed, thereby replacing the width, height and thickness of the damper. The damper is initially set to the maximum opening area, and the air volume passing through the alley here is simulated and calculated.

[0049] Before the damper is set, the air volume passing through this lane is 52.3m 3 / s, change the tunnel section where the damper is installed to a rectangular section, the size of which is the maximum opening area of ​​the damper, 2m high, 1.5m wide, and 0.1m long, to replace the actual damper, and simulate the air volume passing through the tunnel here to be 42.9m 3 / s.

[0050] In step S5, the air volume of the lane at the installation position of the damper adjusted by the simulation solution in step 4 is compared with the air volume required to pass through the lane, and the width of the lane is adjusted according to the required air volume of the lane. After the adjustment is completed, the simulation solution is performed again, and the solution result will show that the air volume passing through the lane is the required air volume. By simulating the air volume and the required air volume of the lane, the ventilation requirements of the lane can be accurately understood. Adjusting the lane width on this basis can ensure smoother air circulation in the lane, reduce ventilation resistance, and thus improve ventilation efficiency.

[0051] The air volume required to pass through this lane is 35.0m 3 / s, the current wind volume passing through this tunnel is 42.9m 3 / s. Change the size of the tunnel section where the damper is installed, and adjust the tunnel width while keeping the tunnel height unchanged, decreasing by 0.1m each time until the air volume passing through the tunnel reaches the required air volume. See Table 1 for the change of tunnel air volume with tunnel width.

[0052] Table 1

[0053]

[0054]

[0055] According to Table 2, the tunnel width is 1.0m, the tunnel height is 2m, and the opening area is 2.0m2 When the wind volume through this lane is 34.5m 3 / s, which is 35m higher than the air volume required to pass through the tunnel 3 / s less than 0.5m 3 / s, increase the adjustment accuracy of the tunnel section, starting from the tunnel width of 1.0m, and increase by 0.01m in sequence until the air volume passing through this tunnel reaches the required air volume. The change of tunnel air volume with tunnel width is shown in Table 2.

[0056] Table 2

[0057] Serial number Lane width (m) <![CDATA[Cross-sectional area of roadway (m 2 )]]> <![CDATA[The roadway passes through the wind (m 3 / s)]]> 1 1.01 2.02 34.7 2 1.02 2.04 34.9 3 1.03 2.06 35.2 4 1.04 2.08 35.4 5 1.05 2.10 35.6

[0058] In step S6, the actual opening size of the mine damper is adjusted according to the simulation result of step 5. The air volume passing through the tunnel is the required air volume, and the cross-sectional area of ​​the tunnel is the opening area of ​​the damper. The actual opening area of ​​the damper is consistent with the cross-sectional area of ​​the tunnel calculated in step 5.

[0059] According to the change of tunnel air volume with tunnel width in Table 2 of step 5, the tunnel width is 1.03m, the tunnel height is 2m, and the opening area is 2.06m 2 When the wind volume through this lane is 35.2m 3 / s, which is almost equal to the required air volume, that is, the actual opening area of ​​the push-pull regulating damper in the mine is 2.06m 2 At this time, the actual air volume passing through the tunnel is the required air volume.

[0060] In step S6, multiple simulation experiments are performed to facilitate the determination of an average value, which is used to further improve the reliability of the measurement results. Multiple measurements and averaging can effectively reduce the error that may exist in a single measurement, thereby improving the accuracy of the data. Through multiple measurements, the actual damper opening area can be adjusted more closely.

[0061] In step S7, according to the three-dimensional simulation results of the ventilation system in step 6, technical guidance is provided for the actual setting of the damper opening area of ​​the mine.

[0062] From step 6, we can know that the actual opening area of ​​the mine damper is 2.06m 2 The adjustable damper here is a push-pull adjustable damper. The wind passing area can be adjusted by changing the width of the damper opening. According to the opening area of ​​2.06m 2 According to calculation, the opening width of the regulating damper is 1.03m, and the air volume passing through the tunnel is the required air volume.

[0063] It can be concluded from the above steps that the present invention utilizes three-dimensional simulation software to establish a mine ventilation system solution model, calculates the required air volume at the work site, and adjusts the tunnel section of the local location in the model so that the air volume at the work site meets the required air volume requirement, thereby realizing the economical and effective design of air volume regulation by adjusting the damper, effectively avoiding the inaccuracy of the opening area determined by manual experience, the poor ventilation effect at the work site, and other problems, thereby providing effective protection for the safe production of operators and providing assistance for the promotion of intelligent mine work.

[0064] The above are only preferred specific implementation modes of the present invention, but the protection scope of the present invention is not limited thereto. Any technician familiar with the technical field can make equivalent replacements or changes according to the technical solutions and inventive concepts of the present invention within the technical scope disclosed by the present invention, which should be covered by the protection scope of the present invention.

Claims

1. A method for adjusting a tunnel damper to determine an opening area, comprising the following steps: S1. Determine the size and installation location of the damper to be installed; S2. Calculate the air volume required to pass through the lane where the damper is installed; S3. Draw a 2D CAD plan of the mine; S4. Using simulation method, the maximum opening area of ​​the damper is initially set, and the air volume passing through the tunnel is simulated and calculated; S5. Adjust the damper opening area according to the required air volume of the lane until the air volume passing through the lane reaches the required air volume; S6. Conduct multiple simulation experiments and measure, and adjust the opening area of ​​the actual air damper in the mine according to the simulation results; S7. Provide a basis for setting the actual damper opening area in the mine.

2. A method for adjusting a tunnel damper to determine an opening area according to claim 1, characterized in that: In step S1, the length, width, thickness and maximum opening area of ​​the regulating damper required for installation are determined, and the specific location where the regulating damper is installed in the underground tunnel is determined.

3. A method for adjusting a tunnel damper to determine an opening area according to claim 1, characterized in that: In step S2, the required air volume is calculated by an air volume calculation method according to the actual situation of the mine.

4. A method for adjusting a tunnel damper to determine an opening area according to claim 1, characterized in that: In step S3, the two-dimensional CAD plan view of the mine is used to establish a three-dimensional simulation model of the mine ventilation system using three-dimensional simulation software of the ventilation system.

5. A method for adjusting a tunnel damper to determine an opening area according to claim 2, characterized in that: In step S4, the simulation method is used to change the width, height and length of the alley where the regulating damper is installed, thereby replacing the width, height and thickness of the regulating damper. The regulating damper is initially set to the maximum opening area, and the air volume passing through the alley here is simulated and calculated.

6. A method for adjusting a tunnel damper to determine an opening area according to claim 5, characterized in that: In step S5, the air volume of the alley at the damper installation position calculated by the simulation in step 4 is compared with the air volume required to pass through the alley, and the width of the alley is adjusted according to the required air volume of the alley. After the adjustment is completed, the simulation is performed again, and the calculation result will show that the air volume passing through the alley is the required air volume.

7. A method for adjusting a tunnel damper to determine an opening area according to claim 1, characterized in that: In step S6, the simulation solution result of step 5 is used to adjust the switch size of the actual regulating damper of the mine. The air volume passing through the tunnel is the required air volume, and the cross-sectional area of ​​the tunnel is the opening area of ​​the regulating damper. The actual regulating damper opening area is consistent with the tunnel cross-sectional area calculated in step 5.

8. A method for adjusting a tunnel damper to determine an opening area according to claim 7, characterized in that: In step S7, according to the three-dimensional simulation results of the ventilation system in step 6, technical guidance is provided for the actual setting of the damper opening area of ​​the mine.

9. A method for adjusting a tunnel damper to determine an opening area according to claim 4, characterized in that: The three-dimensional simulation model of the mine ventilation system is established by using Ventsim three-dimensional simulation software.

10. A method for adjusting a tunnel damper to determine an opening area according to claim 1, characterized in that: In step S6, the multiple simulation experiment measurements are used to facilitate the determination of an average value, and the determined average value is used to further improve the reliability of the measurement result.

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