CN103266906B - Method for verifying state of mine ventilation system by self-adjusting tunnel wind resistance parameters - Google Patents
Method for verifying state of mine ventilation system by self-adjusting tunnel wind resistance parameters Download PDFInfo
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- 238000009423 ventilation Methods 0.000 title claims abstract description 115
- 238000000034 method Methods 0.000 title claims abstract description 23
- 230000008569 process Effects 0.000 claims abstract description 9
- 230000008859 change Effects 0.000 claims abstract description 7
- 238000013479 data entry Methods 0.000 claims description 2
- 238000005065 mining Methods 0.000 description 5
- 238000012544 monitoring process Methods 0.000 description 5
- 238000005259 measurement Methods 0.000 description 4
- 230000000694 effects Effects 0.000 description 3
- 238000005516 engineering process Methods 0.000 description 3
- 238000004364 calculation method Methods 0.000 description 2
- 239000003245 coal Substances 0.000 description 2
- 230000003111 delayed effect Effects 0.000 description 2
- 238000004519 manufacturing process Methods 0.000 description 2
- 238000012986 modification Methods 0.000 description 2
- 230000004048 modification Effects 0.000 description 2
- 238000004088 simulation Methods 0.000 description 2
- 230000009286 beneficial effect Effects 0.000 description 1
- 230000000052 comparative effect Effects 0.000 description 1
- 238000011161 development Methods 0.000 description 1
- 238000007865 diluting Methods 0.000 description 1
- 238000004880 explosion Methods 0.000 description 1
- 230000036541 health Effects 0.000 description 1
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Abstract
A, arranging a wind speed sensor for measuring ventilation volume in a tunnel with large underground wind resistance change; b. arranging a wind speed sensor for measuring ventilation quantity in a wind channel of a main mine ventilator; c. setting the roadway with large wind resistance change and the roadway where the main ventilator is located into a fixed air volume branch in the data input process of the mine ventilation network resolving program to obtain the ventilation volume and the ventilation resistance value of other roadways in the whole mine; d. setting the ventilation volume of the tunnel with the fixed air volume branch to be fixed, and calculating the resistance value of the corresponding tunnel according to the air pressure balance relation of each branch of the loop where the fixed air volume branch is positioned; e. and replacing the obtained calculated wind resistance value of the tunnel with larger wind resistance change with the existing wind resistance value of the tunnel with larger measured wind resistance change to be a new value, and judging whether the state of the mine ventilation system is good or not.
Description
Technical field
The present invention relates to a kind of method verifying mine ventilation system ventilation state.
Background technology
Mine ventilation system is one of composition subsystem important in mine production system.The main effect of mine ventilation system is that (1) provides fresh distinguished and admirable, to ensure the health of personnel for underground work personnel; (2) by fresh distinguished and admirable diluting effect, the pernicious gas of down-hole based on gas is diluted, discharge, assemble in order to avoid cause and the accidents such as gas explosion occur.So can mine ventilation system normally work and be directly connected to the safety in production of mine.
At present, a large amount of monitoring and controlling system uses widely at underground coal mine, and the underground monitoring data of magnanimity, as tunnel windage value, ventilation etc., can be easy to obtained, but these data not yet obtain fully effective utilization.
On the other hand, Mine Ventilation Network Solution is the allocation of the amount of air process solving wind net based on the windage of known Feng Wangge branch, the Mine Ventilation Network Solution of current enforcement mine ventilation system, the simulation completing ventilation state is broken through as a kind of technology of routine.But basic data (referring to the windage value in tunnel, the parameter of coal master's blower fan, the air quantity etc. of mining face under mine, development end) required for Mine Ventilation Network Solution is generally first manually carried out mine ventilation system measure of resistance work at the scene and is obtained.Due to the continuity of producing, digging tunnel and work plane position are all constantly changing, and the inevitable delayed and on-site actual situations of the basic data obtained by measure of resistance work, therefore also can only react the situation of a mine ventilation system period.
To sum up, the monitored data obtained in real time down-hole and Mine Ventilation Network Solution are simulated these two aspects and are combined, realize the real-time update of mine ventilation network data, complete real-time resolving, then theory is resolved ventilation to compare with actual measurement ventilation, the ventilation state of reflection mine ventilation system is very necessary.
Summary of the invention
The technical problem that the present invention solves: the method that the checking mine ventilation system state of a kind of tunnel windage parameters self-tuning is provided, improve that current monitoring mining data user rate is not high, some tunnel variable windage measured value is delayed, the technical problem of on-site actual situations cannot be reflected.
For solving the problems of the technologies described above, the present invention adopts following technical scheme:
A method for the checking mine ventilation system state of tunnel windage parameters self-tuning, comprises the following steps:
A, in the tunnel that down-hole windage changes greatly, arrange air velocity transducer for measuring ventilation;
B, in mine main ventilator air channel, arrange air velocity transducer for measuring ventilation;
C, fixing air quantity branch is arranged in the tunnel (referring to have the tunnel of driving face) windage changed greatly and tunnel, main fan place in Mine Ventilation Network Solution program in data entry process, (this is a kind of method of Ventilation Network Solution, as long as in solution process, given corresponding program symbol flag, software program is understood, and these tunnels are the branches being set to fixing air quantity, in operation afterwards, these tunnels just do not participate in calculating), Mine Ventilation Network Solution is carried out in conjunction with the existing each tunnel windage value measured, the tunnel that Mine Ventilation Network Solution procedure stipulation is set to fixing air quantity branch does not participate in calculating, obtain ventilation and the flowing resistance value in other tunnels in full mine,
D, the ventilation in tunnel being set to fixing air quantity branch are fixing, and flowing resistance value is then the Resistance Value calculating corresponding tunnel according to each branch in fixing loop, air quantity branch place by pressure balance relation; According to the relational expression H=RQ of ventilation and resistance
2solve windage change greatly the current state in tunnel under calculating windage value, wherein H is Resistance Value, and R is windage value, and Q is ventilation value;
E, the calculating windage value in the tunnel windage obtained in steps d changed greatly replace the existing windage value that corresponding acoustic wind hinder the tunnel changed greatly becomes new value, and all the other tunnel windages are worth constant;
F, remove in Mine Ventilation Network Solution program original fixing air quantity branch heading input program symbol flag arrange, three feature point values of the fan performance curve of the main ventilation of current for mine running are updated in Mine Ventilation Network Solution program, carry out resolving according to the Mine Ventilation Network Solution program under normal natural wind condition in conjunction with the windage value that each tunnel is new, obtain the theory in each tunnel is resolved under current ventilation state ventilation value and flowing resistance value.
The first time Ventilation Network Solution of above process is carry out under the condition of given value through leading portion timing based on existing each tunnel windage value, and second time is resolved, and is that the network of tunnel windage value after upgrading resolves.
The method of the checking mine ventilation system state of this tunnel windage parameters self-tuning is reasonably utilized the tunnel windage value of existing mensuration, and make Ventilation Network Solution acquisition dash amount in theory become possibility compared with carrying out between on-the-spot actual measured results in real time.The theory being changed greatly tunnel by contrast windage resolves ventilation and field measurement ventilation, determines whether the fluctuation of mine ventilation network is in acceptable scope, namely whether is within 15%, judges that whether mine ventilation network is in a safe condition; Simultaneously by the ventilation resolving each tunnel that ventilation and monitoring mining monitoring system record theoretical under the current state of any tunnel of contrast (mainly windage value change greatly tunnel), judge that whether mine ventilation network is in a safe condition.
Beneficial effect: in the present invention, first utilize in the tunnel and mine main ventilator air channel changed greatly in down-hole windage and air velocity transducer is set in order to measure the ventilation in corresponding tunnel, the existing windage value in each tunnel obtained in conjunction with the mine ventilation system measure of resistance work in period the last period successively completes twice different conditions and to go down into a mine Ventilation Network Solution, obtains the theory in each tunnel under current state and resolves ventilation.The ventilation value resolved and become compared with carrying out between flowing resistance value with on-the-spot actual measured results on the spot may and make mine ventilation network judgement whether in a safe condition.
Accompanying drawing explanation
Fig. 1 is the handling process of the inventive method;
Fig. 2 is the Study on mine ventilation network graph of the embodiment of the present invention.
Detailed description of the invention
Below in conjunction with accompanying drawing, the present invention is further described.
Fig. 2 is the Study on mine ventilation network graph of the embodiment of the present invention, and this ventilation network comprises altogether 10 tunnels, 7 nodes, and wherein No. 1 and No. 2 tunnels are two coal-faces in system, and No. 3 tunnels are system main fan branch.Can predict, due to constantly carrying out of mining activity, the physical dimension in No. 1 and No. 2 tunnel changes all at any time, and therefore these two tunnels belong to the branch that windage changes greatly.
The windage value in each tunnel existing obtained by the mine ventilation system measure of resistance work in period the last period is as shown in table 1.
Table 1 tunnel initial windage value summary sheet
| Tunnel sequence number | Initial point | End point | Windage value (kg/m 7) |
| 1 | 75 | 82 | 0.108 |
| 2 | 75 | 82 | 0.13 |
| 3 | 88 | 1 | 0.007 |
| 4 | 1 | 3 | 0.149 |
| 5 | 3 | 62 | 0.0157 |
| 6 | 62 | 70 | 0.0584 |
| 7 | 70 | 75 | 0.004 |
| 8 | 70 | 82 | 0.2 |
| 9 | 62 | 88 | 0.563 |
| 10 | 82 | 88 | 0.017 |
Suppose that will carry out real-time network to present operation ventilation system resolves, checking mine ventilation system ventilation state, comprises the following steps that (see Fig. 2, initial point end point is the numeral with circle in Fig. 2, represent the intersection point in tunnel, the numeral tunnel sequence number not with circle):
A, in the tunnel 1 and 2 that down-hole windage changes greatly, arrange air velocity transducer for measuring ventilation, the actual ventilation value obtained is listed in table 2;
B, in mine main ventilator tunnel 3, arrange air velocity transducer for measuring ventilation, the actual ventilation value obtained is listed in table 2;
C, the tunnel 1 and 2 windage changed greatly and main fan tunnel 3 are arranged to the fixing air quantity branch windage value also combined in the existing each tunnel windage value and table 1 measured and are carried out Mine Ventilation Network Solution program (" coal-mining simulation system V1.0 " that existing program is developed as China Mining University) and resolve, for simulating actual ventilation state, ensure that the ventilation being set to the branch in fixing tunnel is constant, Mine Ventilation Network Solution procedure stipulation is set to tunnel and the tunnel 1 of fixing air quantity branch, 2, 3 do not participate in calculating, obtain ventilation and the flowing resistance value in other 4-10 tunnels in full mine, the results are shown in Table 2,
Table 2 arranges fixing air quantity branch condition lower network calculation result
D, do not participate in first time Mine Ventilation Network Solution process because of fixing air quantity branch and tunnel 1,2,3, therefore calculate the resistance in corresponding tunnel 1,2,3 by pressure balance relation according to each branch parameter in fixing air quantity branch and loop, place, tunnel 1,2,3, be recorded in table 3; According to the relational expression H=RQ of ventilation and resistance
2the ventilation value that substitution air velocity transducer records and the Resistance Value calculated by pressure balance relation, solve the calculating windage value under the current state in the tunnel 1 and 2 that windage changes greatly, namely be the new windage value of reality in the tunnel 1 and 2 that current windage changes greatly, be recorded in table 3, wherein H is Resistance Value, and R is windage value, and Q is ventilation value; Table 2 is windage in conjunction with other tunnels existing and actual measurement air quantity instantly, arranges fixed value and substitutes into network and resolve, so the resistance that this situation resolves down the tunnel 1,2,3 calculated is not accurate enough.Because calculate the Resistance Value in variable windage tunnel with pressure balance, 1 in table 2,2, the Resistance Value in 3 tunnels do not meet pressure balance relation (therefore not providing) in the loop, the solution meeting balance provides in table 3.
Program computation method of the present invention is similar to circuit theory, and air quantity is equivalent to electric current, and resistance is equivalent to voltage, for a closed-loop path, and the pressure on its loop and must be zero.The tunnel of aforementioned fixing air quantity branch does not participate in calculating, and after network resolves, the flowing resistance value in other tunnels can all obtain.In order to make fixing air quantity branch place loop (closed-loop path) blast and be zero, program around this principle, provide a Resistance Value, namely list by table 3.
Air quantity branch relevant parameters fixed by table 3
The windage value in the existing tunnel 1 and 2 measured of calculating windage value replacement in the tunnel 1 and the 2 e. windage obtained in steps d changed greatly becomes new value, and the windage value in other 3-10 tunnels remains unchanged;
F, in network solver, remove the setting in original fixing air quantity branch and tunnel 1,2,3, three feature point values of the fan performance curve of the main ventilation of current for mine shown in table 4 running are updated in Mine Ventilation Network Solution program and go, carry out according to the Mine Ventilation Network Solution under normal natural splitting condition in conjunction with each tunnel new windage value simultaneously, obtain the theory in each tunnel under current ventilation state and resolve ventilation value and flowing resistance value, be recorded in as in table 5.
The characteristic point of the fan performance curve of the main ventilation of the current running of table 4
| Sequence number | Main ventilation fan delivery (m 3/s） | Main fan blast (Pa) |
| 1 | 51 | 3500 |
| 2 | 58.5 | 3100 |
| 3 | 66 | 2300 |
The theoretical calculation result of ventilation system ventilation parameter under table 5 current state
Theory is resolved compared with ventilation carries out with actual measurement ventilation, find for three tunnels being originally set to fixing air quantity branch, namely 1,2 and 3, theory shown in its table 5 resolves measured result difference small (within 15%) in ventilation and table 2, proves that the fluctuation of mine ventilation network is in acceptable scope.On the other hand, if the ventilation comparative result difference in any tunnel is very large in table 2 and table 5, then proves to there is safety problem in current mine ventilation network, need arouse attention.
The above is only the preferred embodiment of the present invention; be noted that for those skilled in the art; under the premise without departing from the principles of the invention, can also make some improvements and modifications, these improvements and modifications also should be considered as protection scope of the present invention.
Claims (2)
1. a method for the checking mine ventilation system state of tunnel windage parameters self-tuning, is characterized in that comprising the following steps:
A, in the tunnel that down-hole windage changes greatly, arrange air velocity transducer for measuring ventilation;
B, in mine main ventilator air channel, arrange air velocity transducer for measuring ventilation;
Namely c, tunnel windage changed greatly refer to have the tunnel of driving face and tunnel, main fan place to be arranged to fixing air quantity branch in data entry process in Mine Ventilation Network Solution program, Mine Ventilation Network Solution is carried out in conjunction with the existing each tunnel windage value measured, the tunnel that Mine Ventilation Network Solution procedure stipulation is set to fixing air quantity branch does not participate in calculating, and obtains ventilation and the flowing resistance value in other tunnels in full mine;
D, the ventilation in tunnel being set to fixing air quantity branch are fixing, and flowing resistance value is then the respective value calculated by pressure balance relation according to each branch in fixing loop, air quantity branch place; According to the relational expression H=RQ of ventilation and resistance
2solve these windages change greatly the current state in tunnel under calculating windage value, wherein H is Resistance Value, and R is windage value, and Q is ventilation value;
The existing windage value that e, the calculating windage value in the tunnel windage obtained in steps d changed greatly replace these tunnels becomes new value, and all the other tunnel windages values are constant;
F, in Mine Ventilation Network Solution program, remove the traffic sign placement of the input program code of original fixing air quantity branch heading, three feature point values of the fan performance curve of the main ventilation of current for mine running are updated in Mine Ventilation Network Solution program, carry out resolving according to the Mine Ventilation Network Solution program under normal natural wind condition in conjunction with the windage value that each tunnel is new, obtain the Theory Solution in each tunnel calculates under current ventilation state ventilation value and flowing resistance value.
2.2. the method for the checking mine ventilation system state of tunnel according to claim 1 windage parameters self-tuning, it is characterized in that the first time Ventilation Network Solution of above process is is carry out under the condition of given value through leading portion timing based on existing each tunnel windage value, and second time is resolved, and is that the network of tunnel windage value after upgrading resolves.
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