CN103557898B - Turbulent fluid flow-measuring method in tunnel based on crucial ring - Google Patents
Turbulent fluid flow-measuring method in tunnel based on crucial ring Download PDFInfo
- Publication number
- CN103557898B CN103557898B CN201310546143.8A CN201310546143A CN103557898B CN 103557898 B CN103557898 B CN 103557898B CN 201310546143 A CN201310546143 A CN 201310546143A CN 103557898 B CN103557898 B CN 103557898B
- Authority
- CN
- China
- Prior art keywords
- tunnel
- section
- cross
- ring
- crucial
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Active
Links
Abstract
The invention discloses turbulent fluid flow-measuring method in a kind of tunnel based on crucial ring, it is first determined the cross sectional shape in tunnel, determine its mean wind speed key ring according to the cross sectional shape in tunnel；Then by measuring the wind speed of arbitrfary point on crucial ring, the average wind i.e. obtained on this cross section hastens, and can calculate the flow of fluid in tunnel according to mean wind speed.It it is a kind of new technique simple, accurately measurement tunnel fluid flow.
Description
Technical field
The present invention relates to turbulent fluid flow measurement technology in a kind of coal mine roadway, particularly relate to a kind of lane based on crucial ring
Turbulent fluid flow-measuring method in road.
Background technology
The coal resources energy sources that Dou Shi China is important all the time, coal is institute's accounting in primary energy production and consumption
Heavily it is always held at more than 60%, therefore the dynamics of its exploitation is maximum.Owing to the strip mining transformation colliery of China is less, wherein
The coal production of 92% is underground mining, and through exploitation for many years, superficial part mineral resources are the most exhausted, mineral resources
Exploitation increasingly develop in depth, probably downwardly extend with the speed of 20 meters every year at present.Simultaneously state-owned heavy at China 724
In some colliery, at coal and gas outburst mine 154, account for 21.3%；At highly gassy mine 152, account for 21.0%.Along with ore deposit
The increasing of mountain mining rate and the increase of mining depth, Gas and the journey of gathering in the development end in each stage casing, down-hole
Degree is also increasing, and blast and burning occur under certain condition.Coal dust is also the product of underground coal recovery process,
Underground work personnel suck the dust of excess for a long time can cause pneumoconiosis, and coal dust reaches certain concentration in atmosphere
Time, meet burning things which may cause a fire disaster and be susceptible to dust explosion.In addition, each electric appliances, plant equipment operational situation is bad, electrical network
Being short-circuited and naked light etc., also may ignite travelling belt, cable and timbering, causes exogenous mine fire.Cause
The increase of this mining intensity and the degree of depth will necessarily cause even more serious gas explosion, fire, dust accident etc. its
Its related accidents, the safety in production of down-hole, the life and health of staff and Accident prevention in serious threat.
Coal mining accident take place frequently to mine ventilation system, it was also proposed that the highest requirement.Ventilating system be mine very
Important aid system, it is prevention and administers various disaster, it is achieved the basic means of Safety of Coal Mine Production.Mine ventilation
Purpose be to be provided enough fresh distinguished and admirable by the staff of down-hole and various wind field, dilute or water down along with ore deposit
Mountain exploitation and various poisonous, harmful, the damp that occurs and dust, it is ensured that the good weather bar in underground work space
Part, sets up the work situation of safety and comfort for underground work personnel.Fact proved, the quality of mine ventilation system
With the success or failure close relation that the security critical such as gas accident, fire, treating flour dust produces key factor, many collieries
Major accident all with ventilating system mismanagement or design and unreasonable have important relationship.Particularly gas (coal dust) is quick-fried
Fried, fire incident, this two classes accident is always the casualty accident that coal master wants, and all has with ventilating management close
Relation, ventilating management is not good at being the main remote cause occurred that causes the accident.The most once occurred repeatedly gas quick-fried with dust
Fried accident, all caused by improper ventilation.Such as on August 29th, 2012, colliery, Panzhihua City Xiao Jia gulf, Sichuan Province was sent out
The most great raw gas explosion accident, causes that 45 people are dead, 1 people is missing, 54 people are injured.This accident is precisely due to ventilation duct
Reason confusion, the reliability that ventilating system does not has is poor, and the tunnel of air return system is the most in bad repair, so that effective wind rate is not enough
Caused.On April 16th, 2007, there is the most great gas explosion accident, underground aerial tramway in Wang Zhuan colliery, Pingdingshan City, Henan Province
Die 31 people, hinder 9 people, ambulance corps rescue during occur subsequent explosion, cause 15 rescue team members injured.This accident is also
It is owing to ventilating management is chaotic, booster blowing-out 1 month, make the methane accumulation of spilling and reach explosion ratio and run into
Naked light causes gas explosion, and coal dust has also assisted in blast simultaneously.Within 2000, occur dead 164 people's in wood coombe ore deposit, Guizhou Province
Especially big gas explosion accident is exactly also in that field management is not good at occurring in that caused by circulated air.Therefore mine ventilation is in safety
Production plays vital effect.
But China still has most mine ventilation system to build imperfection at present, lacks the monitoring for ventilating system, it is impossible to
Effectively ensure to be correlated with the air quantity of tunnel and getting working face in down-hole.Therefore, research mine laneway air quantity accurately measures skill
Art and method, all have very important significance with having an accident in normal production period period.
In the measuring method of tunnel fluid flow in the prior art, generally use that homalographic is around-France asks for mean flow
Speed or calculate cross section mean flow by the mathematical relationship of Peak Flow Rate and mean flow rate again by recording cross section Peak Flow Rate
Speed, the former measurement and calculating are the most relatively complicated, and the measurement that the latter typically uses semiempirical formula and Peak Flow Rate also has
Certain error.
Summary of the invention
It is an object of the invention to provide a kind of simply, turbulent fluid flow measurement side in tunnel based on crucial ring accurately
Method.
It is an object of the invention to be achieved through the following technical solutions:
Turbulent fluid flow-measuring method in the tunnel based on crucial ring of the present invention, including step:
First, determine the cross sectional shape in tunnel, then determine its crucial ring, described crucial ring according to the cross sectional shape in tunnel
The wind speed at place is equal to the mean wind speed on cross section, described tunnel；
Then, by measuring the wind speed of arbitrfary point on crucial ring, the average wind i.e. obtained on this cross section hastens, according to averagely
Wind speed can calculate the flow of fluid in tunnel.
As seen from the above technical solution provided by the invention, in the tunnel based on crucial ring that the embodiment of the present invention provides
Turbulent fluid flow-measuring method, owing to according to the velocity distribution on pipeline section of the turbulent fluid in tunnel, determining
Going out the distribution curve of mean flow velocity value on cross section, i.e. VELOCITY DISTRIBUTION " crucial ring ", upper arbitrarily by measuring " crucial ring "
The velocity amplitude of point, just can obtain the mean flow velocity value on this cross section, can be calculated the fluid flow in tunnel, is a kind of
Simply, the new technique of tunnel fluid flow is accurately measured.
Accompanying drawing explanation
Fig. 1 a is the position view of the crucial ring of trapezoid cross section in the embodiment of the present invention；
Fig. 1 b is the area distribution schematic diagram of the crucial ring of trapezoid cross section in the embodiment of the present invention；
Fig. 2 a is the position view of the crucial ring in basket handle arch cross section in the embodiment of the present invention；
Fig. 2 b is the area distribution schematic diagram of the crucial ring in basket handle arch cross section in the embodiment of the present invention.
Detailed description of the invention
The embodiment of the present invention will be described in further detail below.
Turbulent fluid flow-measuring method in the tunnel based on crucial ring of the present invention, its preferably detailed description of the invention is:
Including step:
First, determine the cross sectional shape in tunnel, then determine its crucial ring, described crucial ring according to the cross sectional shape in tunnel
The wind speed at place is equal to the mean wind speed on cross section, described tunnel；
Then, by measuring the wind speed of arbitrfary point on crucial ring, the average wind i.e. obtained on this cross section hastens, according to averagely
Wind speed can calculate the flow of fluid in tunnel.
For trapezoid cross section, determine bottom side length on it, the length of side of going to the bottom and height, calculate the position of its crucial ring according to following table:
For basket handle arch cross section, the length of side that determines that three-core arch wall is high and basket handle arch is gone to the bottom, the position of its crucial ring is calculated according to following table
Put:
Turbulent fluid flow-measuring method in the tunnel based on crucial ring of the present invention, according to turbulent fluid in tunnel at pipeline
Velocity distribution on cross section, determines that the distribution curve of mean flow velocity value on cross section, i.e. VELOCITY DISTRIBUTION are " crucial
Ring ", by measuring the velocity amplitude of " crucial ring " upper arbitrfary point, the mean flow velocity value on this cross section just can be obtained,
It is calculated the fluid flow in tunnel, is a kind of new technique simple, accurately measurement tunnel fluid flow.
Specific embodiment:
First, determine the shape in tunnel, then according to the shape in tunnel, determine that it is " crucial by relationship
Ring ".
As shown in Fig. 1 a, 1b, for trapezoid cross section, determine bottom side length on it, the length of side of going to the bottom and height, calculate it according to table 1
The position of crucial ring:
Table 1 trapezoid cross section " crucial ring " characteristic equation
In above formula: the trapezoidal upper bottom side length of b, m；The trapezoidal length of side of going to the bottom of c, m；The trapezoidal height of H, m；x
Crucial abscissa corresponding to ring, m；Vertical coordinate corresponding to y key ring, m；The crucial ring of f (x) is special
Levy equation, y value.
Above-mentioned relation formula is utilized to calculate the position of its crucial ring.
As shown in Fig. 2 a, 2b, for basket handle arch cross section, the length of side that determines that three-core arch wall is high and basket handle arch is gone to the bottom, count according to table 2
Calculate the position of its crucial ring:
Table 2 basket handle arch cross section " crucial ring " characteristic equation
In above formula: h three-core arch wall is high, m；Go to the bottom the length of side in d basket handle arch cross section, m；r1Basket handle arch cuts
Face top arc radius, m；Abscissa corresponding to x key ring, m；Vertical seat corresponding to y key ring
Mark, m；The crucial ring characteristic equation of f (x), y value.
Above-mentioned relation formula is utilized to calculate the position of its crucial ring.
Then, correlation meter is arranged on crucial ring position, the mean wind speed in this cross section can be measured.By " closing
Key ring " theory can more accurately record the mean wind speed in tunnel, simultaneously can according in each tunnel normal ventilate period its
The predetermined value of wind speed and air quantity arranges alarming value to air velocity transducer, if blower fan is stopped transport, blower fan air supply ability is not enough, wind
Speed is the lowest, and down-hole air velocity transducer just can send sound and light alarm, by the ventilation monitoring software at ground monitoring center, and can be real
Time monitoring each tunnel, down-hole in wind speed and the change of air quantity, can realize the effectively management to whole mine ventilation system with
And the prevention of accident." crucial ring " technology is that the ventilation monitoring system in the Internet of Things construction of whole mine provides reason simultaneously
Opinion basis and technological guidance.
The above, the only present invention preferably detailed description of the invention, but protection scope of the present invention is not limited thereto,
Any those familiar with the art in the technical scope of present disclosure, the change that can readily occur in or replace
Change, all should contain within protection scope of the present invention.Therefore, protection scope of the present invention should be with claims
Protection domain is as the criterion.
Claims (1)
1. turbulent fluid flow-measuring method in a tunnel based on crucial ring, it is characterised in that include step:
First, determining the cross sectional shape in tunnel, then determine its crucial ring according to the cross sectional shape in tunnel, the wind speed at described crucial ring is equal to the mean wind speed on cross section, described tunnel；
Then, by measuring the wind speed of arbitrfary point on crucial ring, i.e. obtain the mean wind speed on this cross section, the flow of fluid in tunnel can be calculated according to mean wind speed；
The cross sectional shape in described tunnel is trapezoid cross section or basket handle arch cross section；
For trapezoid cross section, determine bottom side length on it, the length of side of going to the bottom and height, calculate the position of its crucial ring according to following table:
In above formula: the trapezoidal upper bottom side length of b, m；The trapezoidal length of side of going to the bottom of c, m；The trapezoidal height of H, m；Abscissa corresponding to x key ring, m；Vertical coordinate corresponding to y key ring, m；The crucial ring characteristic equation of f (x), y value；
For basket handle arch cross section, the length of side that determines that three-core arch wall is high and basket handle arch is gone to the bottom, the position of its crucial ring is calculated according to following table:
In above formula: h three-core arch wall is high, m；Go to the bottom the length of side in d basket handle arch cross section, m；r1Basket handle arch section-top arc radius, m；Abscissa corresponding to x key ring, m；Vertical coordinate corresponding to y key ring, m；The crucial ring characteristic equation of f (x), y value.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201310546143.8A CN103557898B (en) | 2013-11-06 | 2013-11-06 | Turbulent fluid flow-measuring method in tunnel based on crucial ring |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201310546143.8A CN103557898B (en) | 2013-11-06 | 2013-11-06 | Turbulent fluid flow-measuring method in tunnel based on crucial ring |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN103557898A CN103557898A (en) | 2014-02-05 |
| CN103557898B true CN103557898B (en) | 2016-08-17 |
Family
ID=50012208
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201310546143.8A Active CN103557898B (en) | 2013-11-06 | 2013-11-06 | Turbulent fluid flow-measuring method in tunnel based on crucial ring |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN103557898B (en) |
Families Citing this family (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN109085379B (en) * | 2018-06-27 | 2020-10-23 | 中煤科工集团重庆研究院有限公司 | Roadway average wind speed measuring method |
| CN110398612A (en) * | 2019-07-22 | 2019-11-01 | 北京奥世欣创科技有限公司 | The measuring and monitoring method of ventilation quantity in a kind of tunnel |
| CN115683243A (en) * | 2022-10-19 | 2023-02-03 | 西安京兆电力科技有限公司 | Air quantity measuring system of non-uniform wind field air duct |
Citations (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102706532A (en) * | 2012-06-01 | 2012-10-03 | 华南理工大学 | Method for measuring uniformity of wind field in wind tunnel |
| CN102852555A (en) * | 2012-05-31 | 2013-01-02 | 山东科技大学 | Advanced prediction method of single-alley tunneling gas outburst |
Family Cites Families (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US5153665A (en) * | 1991-06-14 | 1992-10-06 | The United States Of America As Represented By The Administrator Of The National Aeronautics And Space Administration | Vaporizing particle velocimeter |
| CN103148007A (en) * | 2012-11-27 | 2013-06-12 | 洛阳源创电气有限公司 | Mine ventilating fan control system capable of automatically adjusting air quantity |
-
2013
- 2013-11-06 CN CN201310546143.8A patent/CN103557898B/en active Active
Patent Citations (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102852555A (en) * | 2012-05-31 | 2013-01-02 | 山东科技大学 | Advanced prediction method of single-alley tunneling gas outburst |
| CN102706532A (en) * | 2012-06-01 | 2012-10-03 | 华南理工大学 | Method for measuring uniformity of wind field in wind tunnel |
Non-Patent Citations (1)
| Title |
|---|
| 矿井巷道中外源气体运移-弥散过程仿真研究;李宗翔，王天明，贾进章;《中国矿业大学学报》;20130930;第42卷(第5期);全文 * |
Also Published As
| Publication number | Publication date |
|---|---|
| CN103557898A (en) | 2014-02-05 |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| Ren et al. | CFD modelling of ventilation and dust flow behaviour above an underground bin and the design of an innovative dust mitigation system | |
| CN105118367B (en) | A kind of rail-road shares shield tunnel Fire Ventilation smoke evacuation analogue experiment installation | |
| CN103603691B (en) | A kind of mine ventilation dynamic resolving and analysis early warning method and system | |
| CN103557898B (en) | Turbulent fluid flow-measuring method in tunnel based on crucial ring | |
| Arya et al. | Design and experimental evaluation of a flooded-bed dust scrubber integrated into a longwall shearer | |
| CN204591331U (en) | The mine development end dash system of adjoint high-concentration hydrogen sulfide and gas | |
| CN102944664B (en) | The method of test coal gas desorption properties | |
| Liu et al. | The influence of ventilation parameters on dust pollution in a tunnel's environment using the CFD method | |
| CN205028570U (en) | Public iron sharing shield tunnel conflagration simulation experiment device of discharging fume that ventilates | |
| Ren et al. | Computational fluid dynamics modelling of respirable dust and gas behaviour on a longwall face | |
| CN108087012A (en) | A kind of mine skip shaft outgoing airflow shuts off partition apparatus | |
| Khave | TBM tunnelling in hydrogen sulfide gas bearing ground and its solutions | |
| CN203587585U (en) | Novel methane sensor | |
| CN104500142A (en) | Underground coal mine dust measuring device | |
| Wang et al. | Numerical investigations of airflow patterns on a longwall face | |
| CN207408175U (en) | A kind of coal mine gob pernicious gas multipoint acquisition detection device | |
| CN110985129B (en) | Coal and gas outburst catastrophe identification method for coal mining working face | |
| Brune | Mine ventilation networks optimized for safety and productivity | |
| CN204941603U (en) | A kind of mine safety system | |
| CN212154837U (en) | Tunnel dust removal curtain device | |
| Rider et al. | Benchmarking longwall dust control technology and practices | |
| CN202611702U (en) | Water mist and foam dust settling device | |
| Juganda | CFD modeling of a tailgate ventilation condition in a longwall bleeder system | |
| Meyer | Advancing the technology of methane monitoring on a continuous miner | |
| CN205445651U (en) | Modified mine ventilation device |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C06 | Publication | ||
| PB01 | Publication | ||
| SE01 | Entry into force of request for substantive examination | ||
| SE01 | Entry into force of request for substantive examination | ||
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant |