CN109707432B - Method for automatically converting underground main fan and auxiliary fan into multi-stage machine station ventilation system - Google Patents
Method for automatically converting underground main fan and auxiliary fan into multi-stage machine station ventilation system Download PDFInfo
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Abstract
The invention discloses a method for automatically converting a ventilation system of an underground main fan and an underground auxiliary fan into a multi-stage machine station, which comprises the following steps: s1, dividing the whole production period into two stages, namely a ventilation easy period and a ventilation difficult period according to mine capacity planning and by combining mining depth; s2, respectively carrying out simulation calculation on ventilation networks in the mine ventilation easy period and the ventilation difficult period; s3, establishing a main and auxiliary fan ventilation system in the ventilation easy period; and S4, establishing a multi-stage machine station ventilation system in the period of difficult ventilation. The invention fully combines the advantages of simple ventilation management of the main and auxiliary fans and low ventilation energy consumption of the multi-stage machine station, adopts the underground main and auxiliary fans for ventilation in a period of easy ventilation, saves the investment of engineering and fan equipment, does not need land acquisition and is convenient for ventilation management; in the period of difficult ventilation, the main fan is used as a fan of the second-level station to relay, so that the operation cost is low and the energy-saving effect is obvious; the problem of large difference of wind pressure in the front and the rear stages of a mine ventilation system is solved.
Description
Technical Field
The invention belongs to the technical field of ventilation of underground metal mines and nonmetal mines, and particularly relates to a method for automatically converting a multi-stage station ventilation system by using underground main and auxiliary fans.
Background
In the mining of underground metal ores and non-metal ores, most of mines are forced to be mined from a shallow part to a deep part along with the mining consumption of mineral resources, and a mine ventilation system is also forced to be switched from a period of easy ventilation to a period of difficult ventilation. Compared with the period of easy ventilation, the period of difficult ventilation has the disadvantages that the air inlet and return lines of the system are sharply lengthened, and the air pressure of the ventilation system is sharply increased, so that the difference of the air pressure is large between the period of easy ventilation and the period of difficult ventilation.
At present, underground metal ores and non-metal ores adopt a single main and auxiliary fan ventilation system or a multi-stage station ventilation system within the whole service life of a mine. If a single main fan and a single auxiliary fan are adopted for ventilation, the main fan needs to be selected and set according to the working conditions in difficult periods, so that the main fan is low in efficiency and high in energy consumption in the period of easy ventilation; if single multi-stage machine station ventilation is adopted, the number of machine station fans in the ventilation easy period is large, the management is difficult, the machine station fans installed in the ventilation easy period cannot meet the working conditions in the ventilation difficult period, the fans cannot be continuously utilized in the difficult period, and the fan needs to be repeatedly invested.
The Chinese patent with the publication number of CN203145985U discloses a local concentrated ventilation structure of an underground multistage machine station, which divides a ventilation system into one or more independent structures of local concentrated air inlet-local concentrated air return and/or local dispersed air inlet-local concentrated air return, and is used for solving the problem of disordered air flow of the ventilation system caused by poor ventilation effect of the multistage machine station in deep mining. However, the ventilation structure needs to be provided with a return air machine station in each return air gallery, the number of fans is large, the investment is high, the management is difficult, the air network processing modes in the ventilation easy period and the ventilation difficult period are the same, and the ventilation structure is not suitable for mines with large air pressure difference between the ventilation easy period and the ventilation difficult period.
Disclosure of Invention
The invention aims to provide a method for automatically converting an underground main fan and an underground auxiliary fan into a multistage station ventilation system, which has the advantages of small air pressure difference, low ventilation energy consumption, small quantity of fans, low investment and easiness in management, aiming at the defects of the prior art.
The method for automatically converting the underground main fan and the underground auxiliary fan into the multi-stage machine station ventilation system comprises the following steps:
s1, according to the mine capacity planning, combining the mining depth, dividing the whole production period into two stages of a ventilation easy period and a ventilation difficult period
Taking the middle-section stoping period at the shallow part of the mine as an easy ventilation period, and taking the middle-section stoping period at the deep part of the mine as a difficult ventilation period; the middle section positioned at the uppermost part of the shallow part is communicated with the return air shaft and the inverted section air shaft through a total return air stone door, and other middle sections positioned at the shallow part of the mine and the middle sections positioned at the deep part of the mine are communicated with the inverted section air shaft through middle section return air stone doors;
s2, respectively carrying out simulation calculation on ventilation network in the period of easy ventilation and the period of difficult ventilation of the mine
In the period of easy ventilation, the air quantity and the air pressure of a main fan installation point at the total return air stone door and the air quantity of a remote automatic air door installation point at the middle-section return air stone door are determined through simulation calculation; when the simulation calculation is carried out in the period of difficult ventilation, on the basis of keeping the working condition parameters of the main fan unchanged in the period of easy ventilation, the air quantity and the air pressure of a fan installation point of a first-level machine station at the middle section return air stone door of the deep mine are determined;
s3, establishing a main and auxiliary fan ventilation system during the period of easy ventilation
Selecting the type of the main fan according to working condition parameters determined by simulation calculation, and installing the main fan at a set installation point in a total return stone door; installing a remote automatic air adjusting door at a set installation point in each middle-section air return stone door, adjusting the air quantity of each middle section by the remote automatic air adjusting door according to working condition parameters determined by simulation calculation, and operating a main fan and each remote automatic air adjusting door in a combined manner to form an underground main and auxiliary fan ventilation system with easy ventilation period;
s4, establishing a multi-stage ventilation system of the machine station in the period of difficult ventilation
The type of the I-level machine station fan is selected according to working condition parameters determined by simulation calculation, the I-level machine station fan is installed at a set installation point in a middle section return air stone door in a deep mine, and the main fan is used as a II-level machine station fan to be operated with the I-level machine station fan in a combined mode on the basis of keeping the working condition point of the installed main fan unchanged, so that the underground multi-level machine station ventilation system in the period of difficult ventilation is formed.
Further, in step S2, a simulation calculation is performed on the ventilation network by using a three-dimensional ventilation simulation system for the mine.
Compared with the prior art, the invention has the following advantages:
1. in the period of easy extraction and ventilation at the shallow part of a mine, a main fan and a remote automatic air door are operated in a combined operation mode to form a main and auxiliary fan ventilation system, so that the air pressure of the system in the period of easy ventilation is overcome, and the ventilation requirement in the period of easy ventilation is met; in the period of difficult mining and ventilation in the deep part of the mine, the I-level station fan is arranged at the position of the air return stone door in the middle section of the deep part, and meanwhile, the main fan in the period of easy ventilation is used as the II-level station fan for relay, so that the main fan and the auxiliary fan are automatically converted into the multi-level station ventilation system, the air pressure of the system in the period of difficult ventilation is overcome, the ventilation requirement in the period of difficult ventilation is met, and the difference change of the air pressure of the mine from the period of easy ventilation to the period of difficult.
2. In the period of easy ventilation, only a main fan and a remote automatic air door are arranged to form underground main and auxiliary fan ventilation; in the period of difficult ventilation, only the air return stone door in the middle section of the deep part is provided with a fan of a machine station I, and meanwhile, the main fan in the original period of easy ventilation is used as the fan relay of the machine station II, so that the main fan and the auxiliary fan are automatically converted into the multistage machine stations.
3. The main fan, the remote automatic air door and the I-level station fan are arranged underground and are not arranged on the ground surface, and land acquisition is not needed.
4. The easy period of ventilation adopts and ventilates with operating mode assorted owner in the pit such as this stage system amount of wind, wind pressure, compares all adopting the system that single owner assisted the fan ventilation in the whole service life of mine, and the installed power is littleer during the easy period of ventilation, and the energy consumption is lower.
5. All fans are installed underground, and influence of fan noise on wellhead operation personnel is avoided.
The invention fully combines the advantages of simple ventilation management of the main and auxiliary fans and low ventilation energy consumption of the multi-stage machine station, adopts the underground main and auxiliary fans for ventilation in a period of easy ventilation, saves the investment of engineering and fan equipment, does not need land acquisition and is convenient for ventilation management; in the period of difficult ventilation, the main fan is used as a fan of the second-level station to relay, so that the operation cost is low and the energy-saving effect is obvious; the mine ventilation system solves the problems of large difference of wind pressure in the front and the rear stages, high ventilation energy consumption of a single main fan and an auxiliary fan, large quantity of fans in a single multi-stage machine station, high investment and difficult management, and is particularly suitable for mine ventilation with large difference of wind pressure in the period of easy ventilation and the period of difficult ventilation when the shallow part is shifted to deep mining.
Drawings
FIG. 1 is a schematic view of an easy draft ventilation system of the present invention.
Fig. 2 is a schematic view of a ventilation system for a period of difficulty in ventilation according to the present invention.
The labels shown in the figures and the corresponding component names are:
1. an air inlet well; 2. a shallow middle air inlet lane; 3. a deep middle section air inlet lane; 4. puncturing the vessels; 5. a stope return air raise; 6. an upper plate return airway; 7. a middle section air return stone door; 8. the air door is remotely and automatically adjusted; 9. a total return air stone door; 10. a reversing air shaft; 11. a return air shaft; 12. a main fan; 13. i level machine station fan.
Detailed Description
As can be seen from fig. 1 and 2, the method for automatically switching the ventilation system of the multi-stage machine station by the underground main fan and the underground auxiliary fan comprises the following steps:
s1, according to the mine capacity planning, combining the mining depth, dividing the whole production period into two stages of a ventilation easy period and a ventilation difficult period
An air inlet shaft 1, a middle section air inlet lane, a drift 4, a stope air return patio 5, an upper plate air return lane 6, a middle section air return stone door 7, a total air return stone door 9, a reversed section air shaft 10 and an air return shaft 11 are arranged in a mine, the air inlet end of the middle section air inlet lane is communicated with the air inlet shaft 1, the upper plate air return lanes 6 are arranged above the middle section air inlet lanes one by one, the drift 4 is communicated with the upper plate air return lane 6 and the middle section air inlet lane which are correspondingly arranged, the stope air return patio 5 is communicated with the drift 4 which are adjacently arranged up and down,
taking one or more middle section stoping periods positioned at the shallow part of the mine as ventilation easy periods, and taking a middle section air inlet lane positioned at the ventilation easy period as a shallow part middle section air inlet lane 2; taking one or more middle section mining periods in the deep part of the mine as ventilation difficult periods, taking a middle section air inlet lane in the ventilation difficult period as a deep middle section air inlet lane 3, communicating an air outlet end of a shallow middle section air inlet lane 2 positioned at the uppermost part of the shallow part of the mine and an air outlet end of a reversed section air shaft 10 with an air return shaft 11 through a total air return stone door 9, and communicating other shallow middle section air inlet lanes 2 in the shallow part of the mine and the deep middle section air inlet lane 3 with the reversed section air shaft 10 through a middle section air return stone door 7;
s2, adopting a mine three-dimensional ventilation simulation system Ventsim to respectively carry out simulation calculation on ventilation networks in the mine ventilation easy period and the mine ventilation difficult period
S21, in the period of easy ventilation, presetting a main fan installation point in the total return air stone door 9, presetting a remote automatic air door installation point in each middle-section return air stone door 7, adopting a mine three-dimensional ventilation simulation system Ventsim to carry out simulation calculation on a ventilation network in the period of easy ventilation, and determining the air volume and the air pressure of the main fan installation point and the air volume of the remote automatic air door installation point;
s22, in a period of difficult ventilation, presetting a fan installation point of a grade I machine station in the middle-section return air stone door 7 in the deep part of the mine, and on the basis of keeping working condition parameters of the main fan 12 unchanged in a period of easy ventilation, adopting a mine three-dimensional ventilation simulation system Ventsim to carry out simulation calculation on a ventilation network in the period of difficult ventilation, and determining the air volume and the air pressure of the fan installation point of the grade I machine station;
s3, establishing a main and auxiliary fan ventilation system during the period of easy ventilation
Selecting the type of the main fan 12 according to the working condition parameters determined by the simulated calculation in the step S21, and installing the selected main fan 12 at a preset main fan installation point;
installing the remote automatic air damper 8 at a preset installation point of the remote automatic air damper, and adjusting the air volume of each middle section by the remote automatic air damper 8 according to the working condition parameters determined by simulation calculation in the step S21;
the main fan 12 and each remote automatic damper 8 are operated jointly to form an underground main and auxiliary fan ventilation system with easy ventilation period as shown in figure 1;
s4, establishing a multi-stage ventilation system of the machine station in the period of difficult ventilation
The type selection is performed on the first-stage station fan 13 according to the operating condition parameters determined by the simulated calculation in the step S22, the selected first-stage station fan 13 is installed at a preset first-stage station fan installation point, and the main fan 12 is used as a second-stage station fan to operate in conjunction with the first-stage station fan 13 on the basis of keeping the operating condition point of the installed main fan 12 unchanged, so as to form the underground multi-stage station ventilation system with the ventilation difficulty period as shown in fig. 2.
In the invention, the remote automatic air door 8 can adopt an intelligent non-pressure light-operated automatic air door SZFM remote air door or a double-blade non-pressure balance air door light-operated intelligent remote air door produced by Zaozhuang and Shundao electromechanical equipment limited company, or can adopt a mining automatic control air door disclosed as an authorized bulletin No. CN207393242U, when pedestrians and vehicles pass through, the remote automatic air door 8 can be automatically opened and closed, the personnel is not required to be on duty, and the influence of the noise of the air door on underground operators is avoided.
Claims (2)
1. A method for automatically converting a multi-stage station ventilation system by using underground main and auxiliary fans is characterized by comprising the following steps:
s1, according to the mine capacity planning, combining the mining depth, dividing the whole production period into two stages of a ventilation easy period and a ventilation difficult period
Taking the middle-section stoping period at the shallow part of the mine as an easy ventilation period, and taking the middle-section stoping period at the deep part of the mine as a difficult ventilation period; the middle section positioned at the uppermost part of the shallow part of the mine is communicated with the return air shaft and the inverted section air shaft through a total return air stone door, and other middle sections positioned at the shallow part of the mine and the middle sections positioned at the deep part of the mine are communicated with the inverted section air shaft through middle section return air stone doors;
s2, respectively carrying out simulation calculation on ventilation network in the period of easy ventilation and the period of difficult ventilation of the mine
In the period of easy ventilation, the air quantity and the air pressure of a main fan installation point at the total return air stone door and the air quantity of a remote automatic air door installation point at the middle-section return air stone door are determined through simulation calculation; when the simulation calculation is carried out in the period of difficult ventilation, on the basis of keeping the working condition parameters of the main fan unchanged in the period of easy ventilation, the air quantity and the air pressure of a fan installation point of a first-level machine station at the middle section return air stone door of the deep mine are determined;
s3, establishing a main and auxiliary fan ventilation system during the period of easy ventilation
Selecting the type of the main fan according to working condition parameters determined by simulation calculation, and installing the main fan at a set installation point in a total return stone door; installing a remote automatic air adjusting door at a set installation point in each middle-section air return stone door, adjusting the air quantity of each middle section by the remote automatic air adjusting door according to working condition parameters determined by simulation calculation, and operating a main fan and each remote automatic air adjusting door in a combined manner to form an underground main and auxiliary fan ventilation system with easy ventilation period;
s4, establishing a multi-stage ventilation system of the machine station in the period of difficult ventilation
The type of the I-level machine station fan is selected according to working condition parameters determined by simulation calculation, the I-level machine station fan is installed at a set installation point in a middle section return air stone door in a deep mine, and the main fan is used as a II-level machine station fan to be operated with the I-level machine station fan in a combined mode on the basis of keeping the working condition point of the installed main fan unchanged, so that the underground multi-level machine station ventilation system in the period of difficult ventilation is formed.
2. The method for automatically converting a multi-stage station ventilation system by using underground main and auxiliary fans as claimed in claim 1, wherein the method comprises the following steps: in the step S2, a simulation calculation is performed on the ventilation network by using the mine three-dimensional ventilation simulation system.
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| CN110259499B (en) * | 2019-07-22 | 2021-03-02 | 中国计量大学 | Method for adjusting working condition of multi-fan combined operation in different places of mine |
| CN110469358B (en) * | 2019-08-16 | 2020-08-11 | 长沙有色冶金设计研究院有限公司 | Method for modifying main return air duct suitable for underground centralized return air |
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| CN102889092B (en) * | 2012-10-29 | 2014-10-01 | 中钢集团马鞍山矿山研究院有限公司 | Multi-stage station ventilation technical system of mine |
| CN103089268A (en) * | 2013-02-20 | 2013-05-08 | 中南大学 | Intensive mining method of ore cluster in ore-concentrated area |
| CN106351682B (en) * | 2016-09-13 | 2018-11-16 | 中钢集团马鞍山矿山研究院有限公司 | A kind of ventilating system that can fast implement underground metal mine Multi stages ventilation inverted ventilation |
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