CN106285781A - A kind of method based on search gas quick recognition underground coal mine catastrophe - Google Patents
A kind of method based on search gas quick recognition underground coal mine catastrophe Download PDFInfo
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- CN106285781A CN106285781A CN201610745526.1A CN201610745526A CN106285781A CN 106285781 A CN106285781 A CN 106285781A CN 201610745526 A CN201610745526 A CN 201610745526A CN 106285781 A CN106285781 A CN 106285781A
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- tunnel
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- gas
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- E—FIXED CONSTRUCTIONS
- E21—EARTH DRILLING; MINING
- E21F—SAFETY DEVICES, TRANSPORT, FILLING-UP, RESCUE, VENTILATION, OR DRAINING IN OR OF MINES OR TUNNELS
- E21F17/00—Methods or devices for use in mines or tunnels, not covered elsewhere
- E21F17/18—Special adaptations of signalling or alarm devices
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- E—FIXED CONSTRUCTIONS
- E21—EARTH DRILLING; MINING
- E21F—SAFETY DEVICES, TRANSPORT, FILLING-UP, RESCUE, VENTILATION, OR DRAINING IN OR OF MINES OR TUNNELS
- E21F11/00—Rescue devices or other safety devices, e.g. safety chambers or escape ways
Abstract
The present invention proposes a kind of method based on search gas quick recognition underground coal mine catastrophe, compare cannot sentence fast and accurately after traditional down-hole disaster occurs and know type and the serious conditions that disaster occurs, can be at down-hole disaster accident early period of origination quick recognition disaster accident, fast prediction accident pattern, disaster serious conditions and the parameters in disaster place, it is possible not only to prevent the further expansion of disaster, and accident is carried out in time rescue, personnel in the pit keeps away calamity, and after calamity, control measure etc. are very helpful；By flow distinguished and admirable in the volume of search gas, concentration change and tunnel in tunnel, the situation of the change of wind speed, quickly judge down-hole disaster accident, prediction accident pattern, the serious conditions of disaster.
Description
Technical field
The present invention relates to technical field of mine safety, be specifically related to a kind of based on search gas quick recognition underground coal mine calamity
The method of change accident.
Background technology
China's coal-mine security status allows of no optimist.China's coal-mine exploitation the most gas bearing capacity in coal seam big, breathability is low and
Geological structure is complicated, is difficult to before exploitation draw out methane, but when digging, Methane Diffusion amount is big, adds working seam geology
Complicated condition and the exploitation expansion of scale, the raising of integrated and saving mining degree, cause adopting the stress field of induction, coal and rock crack
And the change of Gas Flow field more complicated and changeable, under certain condition, easily induction coal and gas prominent and gas is prominent
So gush out phenomenon, cause gas accident.Water damage simultaneously, roof collapse also happens occasionally.
The control of mine disaster and to reduce the degree of risk of coal mining accident be one of emphasis of studying of scholars.Work as generation
During serious mine accident, such as fire, Gas Outburst, gushing water, leak out, roof collapse or blast, find disaster accident timely
Important effect is had to reducing accident harm.Therefore must collect the various information of down-hole immediately, judge accurately to rescue
Help and recover complexity and the destructiveness of disaster of action.But, after there is disaster due to down-hole, down-hole situation is very
Complexity, the communication disruption of down-hole or personnel cannot be introduced into down-hole gather information, and the various parameters of down-hole are the most all
Unclear.Such as ventilation, distinguished and admirable path, ventilation network all will change along with disaster change, the most damaged.
After down-hole disaster occurs, whole mine ventilation system can be caused to be affected, air quantity, the change of wind speed all can affect
The living environment of underground labour.In distance accident spot place of " safety " farther out or under normal condition, if personnel in the pit is not
The warning that down-hole disaster occurs can be learnt in time, still in normal operation, it is possible to can occur such as to suffocate, gas explosion, etc.
Catastrophic failure, causes down-hole disaster accident to expand further.Therefore, during down-hole disaster accident occurs, quickly sentence
Know disaster accident and fast prediction disaster accident type and severity of injuries, be possible not only to prevent the further expansion of disaster,
And carrying out in time of accident rescue is very helpful.
At present, research worker not yet find a kind of quick recognition down-hole disaster accident and fast prediction disaster accident type and
Severity of injuries, and instruct rescue and the system of secondary disaster prevention or method with this.
Summary of the invention
For solving the problems referred to above, it is an object of the invention to provide a kind of based on search gas quick recognition underground coal mine catastrophe
The method of accident, by flow distinguished and admirable in the volume of search gas, concentration change and tunnel in tunnel, the feelings of the change of wind speed
Condition, quickly judges down-hole disaster accident, prediction accident pattern, the serious conditions of disaster；Can send out at down-hole disaster accident
Raw initial stage quick recognition disaster accident, fast prediction accident pattern, disaster serious conditions and the parameters in disaster place, not only
Being possible to prevent the further expansion of disaster, and accident is carried out rescue in time, personnel in the pit keeps away calamity, control measure etc. after calamity
It is very helpful.
A kind of method based on search gas quick recognition underground coal mine catastrophe, comprises the following steps:
A, installing search gas discharge conduit at the air intake lane air inlet of work surface, described discharge conduit is in work surface air intake lane
Length at least 5m；Search gas release device, stable-pressure device, volume control device are set in discharge conduit front end, at release pipe
Road tail end installs sensor；Return airway air outlet at work surface arranges search gas collecting, and collecting is at return airway
Interior length at least 5m；It is respectively provided with sensor in the front end of collecting and tail endWith trace gas detection device；Described
Sensor, sensorConnect with gas-detecting device；Search gas data are passed back by described gas-detecting device by circuit
Ground monitoring system center；
B, release search gas, and in the volumetric concentration data of the ground monitoring system center search gas to collecting and tunnel
Interior distinguished and admirable data on flows arranges and analyzes, it is judged that whether the class of catastrophe, catastrophe occurs in roadway workface
Type, and the seriousness of catastrophe；
C, judge catastrophe to occur in work surface after, ground monitoring system center should send alarm and warn, and organizes well
Lower personnel's hedging and expansion accident rescue.
Further, in above-mentioned steps B, it is judged that the criterion whether catastrophe occur in roadway workface is: spike gas
In the volumetric concentration of body and tunnel, whether distinguished and admirable flow changes, particularly as follows: the volumetric concentration of (1) search gas occurs prominent
Become, i.e. the volumetric concentration of search gas persistently raises, persistently reduces or fluctuated；(2) in tunnel, distinguished and admirable flow occurs abnormal
Change, the most distinguished and the most admirable flow reduces suddenly, uniform flow is raised and lowered, flow is fluctuated；When (1) or (2) occurs, then
Catastrophe is there is in judging roadway workface.
Further, in above-mentioned steps B, it is judged that the method for accident pattern is: (1) reduces when the volume of search gas,
In tunnel, distinguished and admirable flow also reduces simultaneously, and when their variable quantity is consistent, then leak out situation in tunnel, prediction work face；
(2) reduce the most suddenly when the volumetric concentration of search gas, and when in tunnel, distinguished and admirable changes in flow rate is little, then work surface
There is roof collapse disaster in tunnel；(3) when the volumetric concentration of search gas presents the trend of increase and becomes over time
Near the most constant, and in tunnel, distinguished and admirable flow presents the trend of uniformly reduction, but tend to be steady after a period of time, then predict
Roadway workface there occurs floods accident；(4) then last holding is being increased when search gas volumetric concentration presents first to reduce
The trend that normal value is invariable, the distinguished and admirable flow in tunnel is then first to increase to reduce last when keeping constant afterwards, then predict work
Make tunnel, face and there occurs fire incident；(5) when in tunnel the volumetric concentration of search gas present and slowly reduce last holding not
The trend become, the distinguished and admirable flow in tunnel presents when being slowly increased the trend finally keeping constant, then lane, prediction work face
Road there occurs gas leakage accident.
Further, in above-mentioned steps B, it is judged that accident (Crash) severity method be: (1) is when occurring that roadway workface leaks out
During accident, in the search gas reduction in volume detected and tunnel, distinguished and admirable flow reduction amount is the biggest, then situation of leaking out is the most serious；
(2) when there is roadway workface generation roof collapse accident, the volumetric concentration of the search gas detected is the least, then top board emits
The blocking that falls is the most serious；(3) when roadway workface there occurs fire incident, the volumetric concentration reduction amount of the search gas detected
The most and reduce the time the longest, then fire incident is the most serious；(4) when roadway workface there occurs gas leakage accident, detection
The concentration of the search gas arrived is the least, then gas leakage is the most serious.
Compared with prior art, the beneficial effects of the present invention is:
The present invention compares cannot sentence fast and accurately after traditional down-hole disaster occurs and knows type and the serious feelings that disaster occurs
Condition, can be in down-hole disaster accident early period of origination quick recognition disaster accident, fast prediction accident pattern, disaster serious conditions and calamity
The parameters in evil place, is possible not only to prevent the further expansion of disaster, and accident is carried out rescue, personnel in the pit in time
Keep away calamity, after calamity, control measure etc. are very helpful；By in the volume of search gas, concentration change and tunnel in tunnel
Distinguished and admirable flow, the situation of change of wind speed, quickly judge to occur down-hole disaster accident, prediction accident pattern, disaster serious
Situation.
Accompanying drawing explanation
Accompanying drawing 1 is that in the present invention, in mining face under mine tunnel, search gas discharge conduit and collecting arrange schematic diagram；
Accompanying drawing 2 is distinguished and admirable when being air leakage in roadway accident, search gas volume variation diagram；
Accompanying drawing 3 is distinguished and admirable when being back inbreak accident, search gas volumetric concentration variation diagram；
Accompanying drawing 4 is distinguished and admirable when being tunnel floods accident, search gas volumetric concentration variation diagram；
Accompanying drawing 5 is distinguished and admirable when being roadway fire accident, search gas volumetric concentration variation diagram；
Accompanying drawing 6 is distinguished and admirable when being tunnel gas leakage, search gas volumetric concentration variation diagram；
In figure: 1-work surface；2-air intake lane；3-return airway；4-discharge conduit；5-collecting；6-search gas release device；
7-stable-pressure device；8-volume control device；9-sensor；10-gas-detecting device；11-sensor。
Detailed description of the invention
With specific embodiment, the present invention is further described below in conjunction with the accompanying drawings, in order to the technology people in this area
Member understands the present invention.
As it is shown in figure 1, air intake lane 2 air inlet at work surface 1 installs search gas discharge conduit 4, described discharge conduit 4
Length at least 5m in work surface air intake lane 2；Search gas release device 6, stable-pressure device 7, stream are set in discharge conduit 4 front end
Amount control device 8, installs sensor at discharge conduit 4 tail end9；Return airway 3 air outlet at work surface 1 arranges search gas
Collecting 5, the collecting 5 at least 5m of the length in return airway 3；It is respectively provided with biography in the front end of collecting 5 and tail end
Sensor11 and trace gas detection device 10；Described sensor9, sensor11 and gas-detecting device 10 connect；Institute
State gas-detecting device 10 and pass search gas data back ground monitoring system center by circuit.Release search gas, and
Data on flows distinguished and admirable in the volumetric concentration data of the ground monitoring system center search gas to collecting and tunnel carries out whole
Reason and analyzing, it is judged that whether the type of catastrophe, catastrophe occur in roadway workface, and catastrophe is serious
Property.After there is catastrophe in judging work surface, ground monitoring system center should send alarm and warn, and organizes device for underground man car
Member's hedging and expansion accident rescue.
The criterion whether catastrophe occur in judging roadway workface is: in the volumetric concentration of search gas and tunnel
Whether distinguished and admirable flow changes, particularly as follows: the volumetric concentration of (1) search gas is undergone mutation, i.e. the volume of search gas is dense
Degree persistently raises, persistently reduces or fluctuated；(2) distinguished and admirable flow generation ANOMALOUS VARIATIONS in tunnel, the most distinguished and the most admirable flow drops suddenly
Low, uniform flow is raised and lowered, flow is fluctuated；When (1) or (2) occurs, then occur in judging roadway workface
Catastrophe.
When being judged as that catastrophe occurs, according to distinguished and admirable flow in the change of the volumetric concentration of search gas and tunnel
Change the type to this accident to be predicted, it was predicted that particularly as follows:
(1) reducing when the volume of search gas, in tunnel, distinguished and admirable flow also reduces simultaneously, and when their variable quantity is consistent,
Then leak out situation in tunnel, prediction work face；
(2) reduce the most suddenly when the volumetric concentration of search gas, and when in tunnel, distinguished and admirable changes in flow rate is little, then work
Make tunnel, face and roof collapse disaster occurs；
(3) when the volumetric concentration of search gas present increase trend and over time convergence the most constant, and tunnel
Interior distinguished and admirable flow presents the trend of uniformly reduction, but tends to be steady after a period of time, then tunnel, prediction work face there occurs
Floods accident；
(4) then the last trend keeping normal value invariable is being increased when search gas volumetric concentration presents first to reduce,
Distinguished and admirable flow in tunnel is then first to increase to reduce last when keeping constant afterwards, then tunnel, prediction work face there occurs fire thing
Therefore；
(5) when in tunnel the volumetric concentration of search gas present slowly to reduce and last keep constant trend, the wind in tunnel
The flow of stream presents when being slowly increased the trend finally keeping constant, then tunnel, prediction work face there occurs gas leakage thing
Therefore.
The disaster accident prediction of above-mentioned down-hole is to use by mixed diluting method, it is assumed that the search gas being discharged in pipeline
FlowAnd volumetric concentrationConstant and distinguished and admirable in containing search gas be zero.In conjunction with flow distinguished and admirable in pipeline, can calculate
The volumetric concentration of search gas under theory state.By just comparing with the search gas volumetric concentration under arm's length standard ventilation state
May determine that whether pipeline occurs disaster；
Mixed gas flow Q meets formula:；
When using pure gas to inject, its formula of mixed gas flow Q is:；
Then the volumetric concentration formula of search gas is:。
When pipeline breaking out of fire, floods, during roof collapse, the pressure in tunnel can be caused to change, if in tunnel
The holding of wind speed is invariable.The concentration of search gas will change.Owing to different disaster situations can cause search gas
Volumetric concentration there is different change.Therefore, according to the situation of change of search gas volumetric concentration parameter, it is known that actual
Disaster scenarios it in tunnel.When there is gas leakage in tunnel, owing to distinguished and admirable in tunnel is permeated with gas, will necessarily cause
The change of mixed gas concentration in pipeline.According to the situation of change of trace gas concentration, it is known that whether occur in tunnel watt
This leakage.
When being judged as that disaster accident occurs, according to the change of distinguished and admirable flow in the change of volumetric concentration of search gas and tunnel
Change the type to this accident to be predicted, secondly carry out interpretation accident according to the concentration of search gas and the variable quantity of distinguished and admirable flow
Seriousness, according to judgment criterion particularly as follows:
(1) when occur roadway workface leak out accident time, distinguished and admirable flow in the search gas reduction in volume detected and tunnel
Reduction amount is the biggest, then situation of leaking out is the most serious；
(2) when there is roadway workface generation roof collapse accident, the volumetric concentration of the search gas detected is the least, then push up
Plate inbreak blocking is the most serious；
(3) when roadway workface there occurs fire incident, the volumetric concentration reduction amount of the search gas detected is the most and subtracts
The little time is the longest, then fire incident is the most serious；
(4) when roadway workface there occurs gas leakage accident, the concentration of the search gas detected is the least, then gas leakage
The most serious.Now ground monitoring center should judge according to these criterions, and down-hole is warned, personnel in the pit's hedging
With expansion accident rescue.
Embodiment of above is only in order to illustrate the present invention and and unrestricted technical scheme described in the invention；Although therefore
This specification with reference to each above-mentioned embodiment to present invention has been detailed description, but the ordinary skill of this area
Personnel should be appreciated that and still can modify the present invention or equivalent；And all without departing from the present invention spirit and
The technical scheme of scope and improvement thereof, it all should be contained in the middle of scope of the presently claimed invention.
Claims (4)
1. a method based on search gas quick recognition underground coal mine catastrophe, it is characterised in that the method include with
Lower step:
A. air intake lane (2) air inlet at work surface (1) installs search gas discharge conduit (4), and described discharge conduit (4) is in work
Make the length at least 5m in air intake lane, face (2)；Search gas release device (6), stable-pressure device are set in discharge conduit (4) front end
(7), volume control device (8), discharge conduit (4) tail end install sensor(9)；Return airway (3) in work surface (1) goes out
Air port arranges search gas collecting (5), the collecting (5) length at least 5m in return airway (3)；In collecting
(5) front end and tail end are respectively provided with sensorAnd trace gas detection device (10) (11)；Described sensor(9), sensing
Device(11) connect with gas-detecting device (10)；Search gas data are passed back by described gas-detecting device (10) by circuit
Ground monitoring system center；
B. search gas is discharged, and in the volumetric concentration data of the ground monitoring system center search gas to collecting and tunnel
Interior distinguished and admirable data on flows arranges and analyzes, it is judged that whether the class of catastrophe, catastrophe occurs in roadway workface
Type, and the seriousness of catastrophe；
C., after there is catastrophe in judging work surface, ground monitoring system center should send alarm and warn, and organizes well
Lower personnel's hedging and expansion accident rescue.
A kind of method based on search gas quick recognition underground coal mine catastrophe, its feature
It is, in described step B, it is judged that the criterion whether catastrophe occur in roadway workface is: the volumetric concentration of search gas
And whether distinguished and admirable flow changes in tunnel, particularly as follows: the volumetric concentration of (1) search gas is undergone mutation, i.e. spike gas
The volumetric concentration of body persistently raises, persistently reduces or fluctuated；(2) distinguished and admirable flow generation ANOMALOUS VARIATIONS in tunnel, the most distinguished and the most admirable
Flow reduces suddenly, uniform flow is raised and lowered, flow is fluctuated；When (1) or (2) occurs, then judge work surface
Catastrophe is there is in tunnel.
A kind of method based on search gas quick recognition underground coal mine catastrophe, its feature
It is, in described step B, it is judged that the method for accident pattern is: (1) reduces when the volume of search gas, tunnel endogenous wind simultaneously
Stream flow also reduces, and when their variable quantity is consistent, then leak out situation in tunnel, prediction work face；(2) search gas is worked as
Volumetric concentration reduce the most suddenly, and when in tunnel, distinguished and admirable changes in flow rate is little, then roadway workface generation top board
Inbreak disaster；(3) when the volumetric concentration of search gas present increase trend and over time convergence the most constant, and
In tunnel, distinguished and admirable flow presents the trend of uniformly reduction, but tends to be steady after a period of time, then tunnel, prediction work face is sent out
Give birth to floods accident；(4) then finally keep normal value constant not in increase when search gas volumetric concentration presents first to reduce
The trend become, the distinguished and admirable flow in tunnel be then first increase reduces afterwards last holding constant time, then tunnel, prediction work face generation
Fire incident；(5) when in tunnel the volumetric concentration of search gas present slowly to reduce and last keep constant trend, tunnel
Interior distinguished and admirable flow presents when being slowly increased the trend finally keeping constant, then tunnel, prediction work face there occurs that gas is let out
Leakage accident.
A kind of method based on search gas quick recognition underground coal mine catastrophe, its feature
Be, in described step B, it is judged that accident (Crash) severity method be: (1) when occur roadway workface leak out accident time, detection
In the search gas reduction in volume arrived and tunnel, distinguished and admirable flow reduction amount is the biggest, then situation of leaking out is the most serious；(2) when work occurs
When making tunnel, face generation roof collapse accident, the volumetric concentration of the search gas detected is the least, then roof collapse blocking is the tightest
Weight；(3) when roadway workface there occurs fire incident, the volumetric concentration reduction amount of the search gas detected is the most and reduces
Time is the longest, then fire incident is the most serious；(4) when roadway workface there occurs gas leakage accident, the spike gas detected
The concentration of body is the least, then gas leakage is the most serious.
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Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
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| CN111964845A (en) * | 2020-08-25 | 2020-11-20 | 中国矿业大学 | Air leakage detection device and method for vertical air shaft explosion door |
| CN112228147A (en) * | 2020-10-20 | 2021-01-15 | 中国矿业大学(北京) | Rapid and remote fire disaster situation distinguishing method based on trace gas method |
| CN112253224A (en) * | 2020-11-03 | 2021-01-22 | 中煤科工集团信息技术有限公司 | Intelligent control method for emergency risk avoidance during fire disaster of underground coal mine |
| CN112362248A (en) * | 2020-10-19 | 2021-02-12 | 太原理工大学 | System and method for detecting goaf air leakage rate under gob-side entry retaining mining in real time |
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