CN106703887B - Secondary gas explosion determination method during mine heat power disaster assistance - Google Patents
Secondary gas explosion determination method during mine heat power disaster assistance Download PDFInfo
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- CN106703887B CN106703887B CN201611043088.0A CN201611043088A CN106703887B CN 106703887 B CN106703887 B CN 106703887B CN 201611043088 A CN201611043088 A CN 201611043088A CN 106703887 B CN106703887 B CN 106703887B
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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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- G—PHYSICS
- G16—INFORMATION AND COMMUNICATION TECHNOLOGY [ICT] SPECIALLY ADAPTED FOR SPECIFIC APPLICATION FIELDS
- G16Z—INFORMATION AND COMMUNICATION TECHNOLOGY [ICT] SPECIALLY ADAPTED FOR SPECIFIC APPLICATION FIELDS, NOT OTHERWISE PROVIDED FOR
- G16Z99/00—Subject matter not provided for in other main groups of this subclass
Abstract
The invention discloses secondary gas explosion determination methods during a kind of mine heat power disaster assistance, including step：One, secondary gas explosion position is determined；Two, estimate that the time of secondary gas explosion occurs for monitored region, process is as follows：201, the environmental parameter in monitored region is obtained；202, judge whether monitored region is the region that high concentration gas explosion occurs；203, the time and probability Estimation that high concentration gas explosion occurs；204, the time and probability Estimation that low concentration gas explosion occurs；Three, estimate that the time of secondary gas explosion occurs for monitored region；Four, secondary gas explosion judgement result is shown and real-time storage.It is of the invention novel in design, it is possible to determine that during heat power Post disaster relief, time, probability and the key index of position three of secondary gas explosion occur for underground coal mine, can provide theoretical reference and guidance for the commanding and decision-making of heat power disaster assistance.
Description
Technical field
The invention belongs to mine heat power disaster assistance technical fields, and in particular to a kind of mine heat power disaster assistance mistake
Secondary gas explosion determination method in journey.
Background technology
Mine fire and the generation evolution mechanism of gas explosion are extremely complex in coal mine heat power disaster, in rescue operations
A variety of secondary disasters may occur, as fall of ground, Climatic regionalization, high-concentration fume, open fire fire, gas and dust explosion,
Distinguished and admirable disorderly, a large amount of toxic and harmful gas of generation, ventilating system destruction etc..Specific implementation person as mine rescue work and place
In dangerous disaster relief forefront personnel, the Individual protection equitment of rescue team member is typically only capable to ensure it from toxic and harmful gas
It threatens, and to gas explosion almost without protective capacities.In rescue operations, the gas explosion of burst may result in into calamity
The personnel of area's rescue die, and seriously threaten the life security of rescue personnel, influence progress and the success or failure of rescue.Science, in time
Mine heat power disaster assistance commanding and decision-making is formulated on ground, to ensureing that there is the life security of rescue personnel important theoretical direction to anticipate
Justice.However, existing research is directed to the research of the mechanism and control technology of primary gas explosion more, in rescue operations
Occur gas explosion mechanism and the characteristic study it is relatively fewer.After occurring due to heat power catastrophe, down-hole disaster area is divulged information often
It is in disturbance state due to heating power and the dynamic effect of disaster generation, the great ambiguity of the condition of a disaster and difficulty are predictive.Heat power disaster
Mechanism and the characteristic study progress that gas explosion occurs in rescue operations are slower, it is difficult to which science effectively instructs heat power disaster
The commanding and decision-making of rescue works.Therefore, nowadays lack secondary gas explosion during a kind of mine heat power disaster assistance
Determination method according to the characteristics of the formation condition and mine gas explosion of gas explosion and rule, and combines mine heat power
Rule characteristic can determine that the time of origin, probability and the key index of position three of secondary gas explosion, to mine heat power calamity
The commanding and decision-making of evil rescue has important theory directive significance.
Invention content
In view of the above-mentioned deficiencies in the prior art, the technical problem to be solved by the present invention is that it is dynamic to provide a kind of mine heat
Secondary gas explosion determination method during power disaster assistance, it is novel in design, it is possible to determine that heat power Post disaster relief process
In, time, probability and the key index of position three of secondary gas explosion occur for underground coal mine, can be heat power disaster assistance
Commanding and decision-making theoretical reference and guidance are provided.
In order to solve the above technical problems, the technical solution adopted by the present invention is：During mine heat power disaster assistance after
Hair property gas explosion determination method, it is characterised in that this approach includes the following steps：
Step 1: determining secondary gas explosion position：By the way that installation region is distinguished at multiple key positions in mine
The temperature parameter of monitoring node acquisition corresponding region is simultaneously indoor to monitoring is mounted on by the temperature parameter real-time Transmission in the region
Temperature parameter threshold value is arranged by keyboard input module in control computer, reaches temperature parameter threshold using control computer calibration
The key position of value prejudges the position that secondary gas explosion occurs；
Area monitoring node includes zone controller and the clock circuit to connect with the zone controller and communication mould
The input of block, zone controller is terminated with temperature sensor, air velocity transducer, gas sensor, is used to acquire monitored region
Gas density and gas flow gas monitor and oxygen concentration for acquiring monitored region and oxygen flow
Oxygen monito；
Step 2: the time of secondary gas explosion occurs for the monitored region of estimation, process is as follows：
Step 201, the environmental parameter for obtaining monitored region：The ventilation shape in monitored region is monitored by air velocity transducer
State monitors the gas bearing capacity and oxygen content in monitored region by gas monitor and oxygen monito respectively；
Step 202 judges whether monitored region is the region that high concentration gas explosion occurs：It is set by zone controller
Monitoring parameters transformation period threshold value is set, according to the environmental parameter of environmental parameter and the clock circuit record obtained in step 201
Transformation period, whether monitored region is high concentration gas blast area after judging calamity, when gas monitor and oxygen monito
Monitored region gas bearing capacity and oxygen content reach the time of the gas explosion limit less than monitoring parameters change after monitoring calamity
When changing time threshold, illustrates that monitored region is that high concentration gas blast area occurs, execute step 203；Otherwise, step is executed
204；
The time Estimate that step 203, high concentration gas explosion occur, process are as follows：
Step 2031, according to formulaThe differential equation is solved, high concentration gas can be obtained
Oxygen concentration changes undergone time t in blast area1Change undergone time t with methane concentration2, whereinV is high concentration gas blast area volume, q1It is mixed to flow into high concentration gas blast area
Close the flow of gas, q2For the flow of mixed gas in outflow high concentration gas blast area, c1To flow into high concentration gas explosion
The concentration of oxygen, c in region2To flow into the concentration of methane in high concentration gas blast area, c01For primary condition t1When=0,
The initial value of oxygen concentration,For oxygen concentration desired value to be achieved, c02For primary condition t2When=0, methane concentration
Initial value,For methane concentration desired value to be achieved；
Step 2032, according to formulaHigh concentration gas blast area oxygen after calculating calamity
Gas concentration becomes the 12% time T undergone1, gas density reach the time T that lower explosion limit 5% is undergone21And gas is dense
Degree reaches the time T that upper explosion limit 16% is undergone22；
The time that step 2033, estimation high concentration gas explosion occur：When oxygen concentration becomes 12% institute in step 2032
The time T of experience1>T22When, high concentration gas explosion does not occur；When in step 2032 oxygen concentration become 12% it is undergone when
Between T21≤T1≤T22When, time t that high concentration gas explosion occurs meets：T1+t3≤t≤T22+t3, wherein t3To reach gas
The gas of explosion limit encounters the time of burning things which may cause a fire disaster；When oxygen concentration becomes the 12% time T undergone in step 20321<T21When,
Time t that high concentration gas explosion occurs meets：T21+t3≤t≤T22+t3；
The time Estimate that step 204, low concentration gas explosion occur, process are as follows：
Step 2041, according to formulaThe differential equation is solved, low concentration can be obtained
Oxygen concentration changes undergone time t' in gas explosion region1Change undergone time t' with methane concentration2, whereinV' is low concentration gas blast area volume, q'1To flow into low concentration gas blast area
The flow of interior mixed gas, q'2For the flow of mixed gas in outflow low concentration gas blast area, c'1To flow into low concentration watt
The concentration of oxygen, c' in this blast area2To flow into the concentration of methane in low concentration gas blast area, c'01For primary condition
t'1When=0, the initial value of oxygen concentration, c'02For primary condition t'2When=0, the initial value of methane concentration；
Step 2042, according to formulaLow concentration gas blast area after calculating calamity
Oxygen concentration becomes the 12% time T' undergone1, gas density reach the time T' that lower explosion limit 5% is undergone21And watt
This concentration reaches the time T' that upper explosion limit 16% is undergone22；
The time that step 2043, estimation low concentration gas explosion occur：When oxygen concentration becomes 12% institute in step 2042
The time T' of experience1>T'22When, time t' that low concentration gas explosion occurs meets：T'21+t'3≤t'≤T'22+t'3；Work as step
Oxygen concentration becomes the 12% time T' undergone in rapid 204221≤T'1≤T'22When, the time of low concentration gas explosion generation
T' meets：T'21+t'3≤t'≤T'1+t'3；When oxygen concentration becomes the 12% time T' undergone in step 20421<T'21When,
Low concentration gas explosion does not occur, wherein t'3Gas to reach the gas explosion limit encounters the time of burning things which may cause a fire disaster；
Step 3: the probability of secondary gas explosion occurs for the monitored region of estimation：It is analyzed according to methods of gas explosion fault tree
Method, probability P=P of gas explosion1×P2×P3, wherein P1Reach the gas explosion limit by monitoring region gas concentration after calamity
Probability and P1Met according to Ke Wade explosion triangles：P1=P1i, i=1~4 and P11=1>P13>P12>P14=0, P11For watt
The probability of this concentration gas explosion limit between 5%~16% and when oxygen concentration is more than 12%, P12It is situated between for gas density
The probability of the gas explosion limit, P between 5%~16% and when oxygen concentration is less than 12%13For gas density be more than 16% it
Between and oxygen concentration be less than 12% when the gas explosion limit probability, P14Gas explosion limit when being less than 5% for gas density
Probability, probability P12And probability P13It is all made of expert point rating method estimated probability value, P2It can be caused by monitoring region presence after calamity
The probability of gas explosion burning things which may cause a fire disaster, P3By monitoring the probability that region reaches the gas of the gas explosion limit and burning things which may cause a fire disaster meets after calamity；
Step 4: secondary gas explosion judgement result is shown and real-time storage：Simultaneously by multiple regions monitoring node
Time and the probability of secondary gas explosion occur for the key position under monitoring well, and by the judgement fructufy of corresponding position
When be transmitted to control computer, by display can real time inspection judgement as a result, by memory in real time preserves judge result.
Secondary gas explosion determination method during above-mentioned mine heat power disaster assistance, it is characterised in that：Step
One and step 4 described in key position include working face intake, tailentry road, in the middle part of working face, working face returns
High temperature smoke affected area and close electrification electricity after wind corner, main air inlet belt tunnel, preceding mine heat power disaster occur
Device and abnormal Gas affected area.
Secondary gas explosion determination method during above-mentioned mine heat power disaster assistance, it is characterised in that：Step
Probability in threeWherein, N is expert's number, p12jThe gas density provided for jth position expert between 5%~
Between 16% and oxygen concentration be less than 12% when the gas explosion limit probability, δjFor p12jCorresponding weight andp13j
The probability of the gas explosion limit when gas density provided for jth position expert is more than between 16% and oxygen concentration is less than 12%,
δ'jFor p13jCorresponding weight and
Secondary gas explosion determination method during above-mentioned mine heat power disaster assistance, it is characterised in that：Step
Probability in threeWherein, probability P21By monitoring the probability and P that region burning things which may cause a fire disaster is duration burning things which may cause a fire disaster after calamity21=1, generally
Rate P22By monitoring the probability and 0≤P that region burning things which may cause a fire disaster is instantaneity burning things which may cause a fire disaster after calamity22≤1。
Secondary gas explosion determination method during above-mentioned mine heat power disaster assistance, it is characterised in that：Step
Probability P in three3=1.
Compared with the prior art, the present invention has the following advantages：
1, the present invention in mine by distinguishing installation region monitoring node at multiple key positions, while monitoring multiple passes
Time and the probability of secondary gas explosion occur at key position, control computer can handle multiple regions monitoring node and adopt simultaneously
The data of collection realize the purpose simultaneously to entire monitoring mining, convenient for promoting the use of.
2, the present invention combines the characteristics of mine heat power disaster down-hole disaster area environment and gas explosion, proposes respectively highly concentrated
After spending gas explosion and low concentration gas explosion generation, the determination method of gas explosion time range, accuracy height.
3, during determination method of the invention can be determined that heat power Post disaster relief, it is quick-fried that secondary gas occurs under mine
Fried time, probability and the key index of position three, to ensureing that rescue personnel's life security is of great significance, feasibility is good,
Highly practical, popularizing application prospect is good.
In conclusion the present invention is novel in design rationally, and it is novel in design, it is possible to determine that during heat power Post disaster relief, coal
Time, probability and the key index of position three of secondary gas explosion occur under mine, can be the finger of heat power disaster assistance
It waves decision and theoretical reference and guidance is provided.
Below by drawings and examples, technical scheme of the present invention will be described in further detail.
Description of the drawings
Fig. 1 is the schematic block circuit diagram that the secondary gas explosion that the present invention uses judges equipment.
Fig. 2 is the schematic block circuit diagram of area monitoring node of the present invention.
Fig. 3 is the method flow block diagram of the secondary gas explosion determination method of the present invention.
Reference sign:
1-area monitoring node；1-1-temperature sensor；1-2-air velocity transducer；
1-3-gas monitor；1-4-oxygen monito；1-5-clock circuit；
1-6-zone controller；1-7-communication module；1-8-gas sensor；
2-keyboard input modules；3-control computers；4-displays；
5-memories.
Specific implementation mode
As shown in Figure 1, secondary gas explosion determination method during mine heat power disaster assistance of the present invention, including with
Lower step：
Step 1: determining secondary gas explosion position：By the way that installation region is distinguished at multiple key positions in mine
The temperature parameter of the acquisition of monitoring node 1 corresponding region is simultaneously indoor to monitoring is mounted on by the temperature parameter real-time Transmission in the region
Temperature parameter threshold value is arranged by keyboard input module 2 in control computer 3, reaches temperature parameter using the calibration of control computer 3
The key position of threshold value prejudges the position that secondary gas explosion occurs；
Area monitoring node 1 includes the zone controller 1-6 and clock circuit 1- to connect with the zone controller 1-6
The input of 5 and communication module 1-7, zone controller 1-6 are terminated with temperature sensor 1-1, air velocity transducer 1-2, gas sensing
The gas monitor 1-3 of device 1-8, the gas density for acquiring monitored region and gas flow and for acquire monitored
The oxygen concentration in region and the oxygen monito 1-4 of oxygen flow；
In the present embodiment, the key position includes working face intake, tailentry road, in the middle part of working face,
Working face Air return corner, main air inlet belt tunnel, a preceding mine heat power disaster high temperature smoke affected area and are leaned on after occurring
Nearly electrification electric appliance and abnormal Gas affected area.
Gas explosion occurs must be with the presence of burning things which may cause a fire disaster, therefore can there will be the fire locations that can cause gas explosion to see
The position for making to occur again gas explosion, in practical shaft production, if the burning things which may cause a fire disaster of preceding mine heat power disaster is caused to be
Continue burning things which may cause a fire disaster, that burning things which may cause a fire disaster exists certainly, and energy causes gas explosion enough；If preceding mine heat power disaster is instantaneous
Burning things which may cause a fire disaster, that preceding mine heat power disaster institute monitoring section after calamity that is possible to ignite cause calamity point or according to disaster area center a certain range
Interior combustible, and as the burning things which may cause a fire disaster of gas explosion；Secondly, high temperature smoke felt area after preceding mine heat power disaster occurs
Domain, such as the caving place for the areas adjacent that monitors, blind lane after calamity, if after calamity institute monitoring section or with institute monitoring section is connected after calamity ventilation
In network, there are high concentration gas library, when institute's monitoring section high temperature smoke spreads to such region after calamity, still there is enough temperature
Degree, the possible mixing fresh air of high temperature smoke, causes the gas, oxygen concentration and burning things which may cause a fire disaster in such region all to reach gas explosion in addition
Condition, it will cause gas explosion；In addition, if there are abnormal Gas, moment in institute monitoring section after calamity in rescue operations
Gush out a large amount of gas, disaster area gas is caused to reach explosion limit, if these regions have electrification electric appliance, it is possible to because electrical
Spark and cause gas explosion, the life security of rescue team member to entering institute monitoring section after calamity threatens.
Step 2: the time of secondary gas explosion occurs for the monitored region of estimation, process is as follows：
Step 201, the environmental parameter for obtaining monitored region：The logical of monitored region is monitored by air velocity transducer 1-2
Wind state monitors the gas bearing capacity in monitored region respectively by gas monitor 1-3 and oxygen monito 1-4 and oxygen contains
Amount；
It should be noted that monitored region is any one place at the key position, in any one place's key position
One area monitoring node 1 of installation estimates that time and the probability of secondary gas explosion occur for monitored region, and any one place is closed
Key position estimates that the time of secondary gas explosion and the method all same of probability occur for monitored region, and control computer 3 can
Key position quick-fried judgement result of secondary gas during mine heat power disaster assistance in many places under monitoring well simultaneously.
Step 202 judges whether monitored region is the region that high concentration gas explosion occurs：Pass through zone controller 1-
6 setting monitoring parameters transformation period threshold values, according to the ring of the environmental parameter and clock circuit 1-5 records that are obtained in step 201
The border Parameters variation time, whether monitored region is high concentration gas blast area after judging calamity, when gas monitor 1-3 and oxygen
Monitored region gas bearing capacity and oxygen content reach the time of the gas explosion limit less than described after gas monitor 1-4 monitoring calamities
When monitoring parameters transformation period threshold value, illustrates that monitored region is that high concentration gas blast area occurs, execute step 203；It is no
Then, step 204 is executed；
It should be noted that high concentration gas explosion refers to after preceding mine heat power disaster generation, monitored region
Interior gas density and oxygen concentration increases rapidly, and gas density and oxygen concentration are at incremental state；Low concentration gas explodes
Refer to after preceding mine heat power disaster occurs, the gas density in monitored region is extremely low, less than under gas density explosion
Limit 5%, corresponding oxygen concentration is higher, and oxygen concentration is higher than 12%, and gas density is in state is slowly incremented by, and oxygen concentration is in slow
Slow decrement states can be used air velocity transducer 1-2, temperature sensor 1-1 and gas sensor 1-8 acquisition Minepit environments, be
Judge whether the region exploded for generation high concentration gas provides reference in monitored region.
The time Estimate that step 203, high concentration gas explosion occur, process are as follows：
Step 2031, according to formulaThe differential equation is solved, high concentration watt can be obtained
Oxygen concentration changes undergone time t in this blast area1Change undergone time t with methane concentration2, whereinV is high concentration gas blast area volume, q1It is mixed to flow into high concentration gas blast area
Close the flow of gas, q2For the flow of mixed gas in outflow high concentration gas blast area, c1To flow into high concentration gas explosion
The concentration of oxygen, c in region2To flow into the concentration of methane in high concentration gas blast area, c01For primary condition t1When=0,
The initial value of oxygen concentration,For oxygen concentration desired value to be achieved, c02For primary condition t2When=0, methane concentration
Initial value,For methane concentration desired value to be achieved；
In actual production, oxygen concentration changes undergone time t in high concentration gas blast area1Become with methane concentration
Change undergone time t2By the clock circuit 1-5 records in monitored region inner region monitoring node 1, high concentration gas is quick-fried
Fried region is any one place at the key position, and high concentration gas blast area volume V is empirical value, flows into high concentration watt
The flow q of mixed gas in this blast area1With the flow q of mixed gas in outflow high concentration gas blast area2It is all made of gas
Body sensor 1-8 is measured, and flows into the concentration c of oxygen in high concentration gas blast area1, primary condition t1Oxygen concentration when=0
Initial value c01With oxygen concentration institute desired value to be achievedIt is measured by oxygen monito 1-4, it is quick-fried to flow into high concentration gas
The concentration c of methane in fried region2, primary condition t2The initial value c of methane concentration when=002With methane concentration institute mesh to be achieved
Scale valueIt is measured by Methane monitoring instrument 1-3.
Step 2032, according to formulaHigh concentration gas blast area oxygen after calculating calamity
Gas concentration becomes the 12% time T undergone1, gas density reach the time T that lower explosion limit 5% is undergone21And gas is dense
Degree reaches the time T that upper explosion limit 16% is undergone22；
The time that step 2033, estimation high concentration gas explosion occur：When oxygen concentration becomes 12% institute in step 2032
The time T of experience1>T22When, high concentration gas explosion does not occur；When in step 2032 oxygen concentration become 12% it is undergone when
Between T21≤T1≤T22When, time t that high concentration gas explosion occurs meets：T1+t3≤t≤T22+t3, wherein t3To reach gas
The gas of explosion limit encounters the time of burning things which may cause a fire disaster；When oxygen concentration becomes the 12% time T undergone in step 20321<T21When,
Time t that high concentration gas explosion occurs meets：T21+t3≤t≤T22+t3；
In actual production, it is arranged by zone controller 1-6 in the high concentration gas blast area inner region monitoring node 1
The temperature sensor 1-1 temperature thresholds and rate temperature change threshold value of the high concentration gas blast area, reach gas explosion
The gas of the limit encounters the time t of burning things which may cause a fire disaster3By the record of clock circuit 1-5 in temperature sensor 1-1 temperature data change procedures
Time measures, and when the temperature data growth rate of the temperature sensor 1-1 acquisitions of the high concentration gas blast area is slow, reaches
The time that the gas of the gas explosion limit encounters burning things which may cause a fire disaster is determined by the temperature sensor 1-1 temperature thresholds being arranged, and reaches temperature biography
When sensor 1-1 temperature thresholds, the rescue team member of institute monitoring section after entering calamity is reminded to take care in time；When the high concentration gas is quick-fried
When the temperature data growth rate of the temperature sensor 1-1 acquisitions in fried region is very fast, the gas for reaching the gas explosion limit encounters
The time of burning things which may cause a fire disaster determines by the temperature sensor 1-1 rate temperature change threshold values being arranged, institute monitoring section after should reminding into calamity
Rescue team member carry out at once it is hidden save oneself, hide the harm that secondary gas explosion is brought.
The time Estimate that step 204, low concentration gas explosion occur, process are as follows：
Step 2041, according to formulaThe differential equation is solved, low concentration can be obtained
Oxygen concentration changes undergone time t' in gas explosion region1Change undergone time t' with methane concentration2, whereinV' is low concentration gas blast area volume, q'1To flow into low concentration gas blast area
The flow of interior mixed gas, q'2For the flow of mixed gas in outflow low concentration gas blast area, c'1To flow into low concentration watt
The concentration of oxygen, c' in this blast area2To flow into the concentration of methane in low concentration gas blast area, c'01For primary condition
t'1When=0, the initial value of oxygen concentration, c'02For primary condition t'2When=0, the initial value of methane concentration；
In actual production, oxygen concentration changes undergone time t' in low concentration gas blast area1And methane concentration
The undergone time t' of variation2By the clock circuit 1-5 records in monitored region inner region monitoring node 1, low concentration watt
This blast area is any one place at the key position, and low concentration gas blast area volume V is empirical value, is flowed into low dense
Spend the flow q' of mixed gas in gas explosion region1With the flow q' of mixed gas in outflow low concentration gas blast area2?
Measured using gas sensor 1-8, flow into low concentration gas blast area in oxygen concentration c '1With primary condition t'1When=0
Oxygen concentration initial value c'01It is measured by oxygen monito 1-4, flows into the concentration of methane in low concentration gas blast area
c'2With primary condition t'2The initial value c' of methane concentration when=002It is measured by Methane monitoring instrument 1-3.
Step 2042, according to formulaLow concentration gas blast area after calculating calamity
Oxygen concentration becomes the 12% time T' undergone1, gas density reach the time T' that lower explosion limit 5% is undergone21And watt
This concentration reaches the time T' that upper explosion limit 16% is undergone22；
The time that step 2043, estimation low concentration gas explosion occur：When oxygen concentration becomes 12% institute in step 2042
The time T' of experience1>T'22When, time t' that low concentration gas explosion occurs meets：T'21+t'3≤t'≤T'22+t'3；Work as step
Oxygen concentration becomes the 12% time T' undergone in rapid 204221≤T'1≤T'22When, the time of low concentration gas explosion generation
T' meets：T'21+t'3≤t'≤T'1+t'3；When oxygen concentration becomes the 12% time T' undergone in step 20421<T'21When,
Low concentration gas explosion does not occur, wherein t'3Gas to reach the gas explosion limit encounters the time of burning things which may cause a fire disaster；
In actual production, it is arranged by zone controller 1-6 in the low concentration gas blast area inner region monitoring node 1
The temperature sensor 1-1 temperature thresholds and rate temperature change threshold value of the low concentration gas blast area, reach gas explosion
The gas of the limit encounters the time t' of burning things which may cause a fire disaster3By the record of clock circuit 1-5 in temperature sensor 1-1 temperature data change procedures
Time measures, and when the temperature data growth rate of the temperature sensor 1-1 acquisitions of the low concentration gas blast area is slow, reaches
The time that the gas of the gas explosion limit encounters burning things which may cause a fire disaster is determined by the temperature sensor 1-1 temperature thresholds being arranged, and reaches temperature biography
When sensor 1-1 temperature thresholds, the rescue team member of institute monitoring section after entering calamity is reminded to take care in time；When the low concentration gas is quick-fried
When the temperature data growth rate of the temperature sensor 1-1 acquisitions in fried region is very fast, the gas for reaching the gas explosion limit encounters
The time of burning things which may cause a fire disaster determines by the temperature sensor 1-1 rate temperature change threshold values being arranged, institute monitoring section after should reminding into calamity
Rescue team member carry out at once it is hidden save oneself, hide the harm that secondary gas explosion is brought.
Step 3: the probability of secondary gas explosion occurs for the monitored region of estimation：It is analyzed according to methods of gas explosion fault tree
Method, probability P=P of gas explosion1×P2×P3, wherein P1Reach the gas explosion limit by monitoring region gas concentration after calamity
Probability and P1Met according to Ke Wade explosion triangles：P1=P1i, i=1~4 and P11=1>P13>P12>P14=0, P11For watt
The probability of this concentration gas explosion limit between 5%~16% and when oxygen concentration is more than 12%, P12It is situated between for gas density
The probability of the gas explosion limit, P between 5%~16% and when oxygen concentration is less than 12%13For gas density be more than 16% it
Between and oxygen concentration be less than 12% when the gas explosion limit probability, P14Gas explosion limit when being less than 5% for gas density
Probability, probability P12And probability P13It is all made of expert point rating method estimated probability value, P2It can be caused by monitoring region presence after calamity
The probability of gas explosion burning things which may cause a fire disaster, P3By monitoring the probability that region reaches the gas of the gas explosion limit and burning things which may cause a fire disaster meets after calamity；
In the present embodiment, probability in step 3Wherein, N is expert's number, p12jFor jth position expert
The probability of the gas density provided gas explosion limit between 5%~16% and when oxygen concentration is less than 12%, δjFor p12j
Corresponding weight andp13jIt is more than between 16% for the gas density that jth position expert provides and oxygen concentration is less than
The probability of the gas explosion limit, δ when 12%j' it is p13jCorresponding weight and
In the present embodiment, probability in step 3Wherein, probability P21It is to continue by monitoring region burning things which may cause a fire disaster after calamity
The probability and P of property burning things which may cause a fire disaster21=1, probability P22By monitoring the probability and 0≤P that region burning things which may cause a fire disaster is instantaneity burning things which may cause a fire disaster after calamity22≤1。
In actual production, duration burning things which may cause a fire disaster refers to after causing heat power disaster for the first time, existing for a long time and can drawing
Send out the burning things which may cause a fire disaster, such as open fire fire etc. of energy needed for gas explosion, the disaster caused by this burning things which may cause a fire disaster, it is believed that secondary burning things which may cause a fire disaster is deposited
Probability be 1, i.e. probability P21=1；Instantaneity burning things which may cause a fire disaster refers to the burning things which may cause a fire disaster of pop-off after causing heat power disaster for the first time,
Such as electric spark.
In the present embodiment, probability P in step 33=1.
In actual production, due to the complexity and ambiguity of heat power disaster, rescue personnel often can not accurately grasp very
Real the condition of a disaster information, therefore, it is impossible to which it is much to judge that the probability of detonable mixed gas and burning things which may cause a fire disaster has, in practical rescue work
In, consider from maximum security, it is believed that it necessarily occurs, i.e. probability P3=1, for on-the-spot rescue team member's life security
Consider, the further expansion of accident in order to prevent, in rescue, as long as we are generally acknowledged that disaster area, gas reaches explosion limit,
It is just bound to that gas explosion, i.e. probability P=P of gas explosion occurs1。
Step 4: secondary gas explosion judgement result is shown and real-time storage：Simultaneously by multiple regions monitoring node 1
Time and the probability of secondary gas explosion occur for the key position under monitoring well, and by the judgement fructufy of corresponding position
When be transmitted to control computer 3, by display 4 can real time inspection judgement as a result, pass through memory 5 in real time preserve judgement knot
Fruit.
In the present embodiment, communication module 1-7 in multiple regions monitoring node 1 is by the way of wired or wireless and control
Computer 3 communicates, and can underground many places key position to that the time of secondary gas explosion occurs and probability results are uploaded to calculating
Machine 3, memory 5 preserve judgement result and provide theoretical reference and guidance for the commanding and decision-making of heat power disaster assistance in real time.
The above is only presently preferred embodiments of the present invention, is not imposed any restrictions to the present invention, every according to the present invention
Technical spirit changes any simple modification, change and equivalent structure made by above example, still falls within skill of the present invention
In the protection domain of art scheme.
Claims (5)
1. secondary gas explosion determination method during mine heat power disaster assistance, it is characterised in that this method includes following
Step：
Step 1: determining secondary gas explosion position：By the way that installation region monitoring is distinguished at multiple key positions in mine
Node (1) acquires the temperature parameter of corresponding region and by the temperature parameter real-time Transmission in the region to mounted on the indoor control of monitoring
Temperature parameter threshold value is arranged by keyboard input module (2) in computer (3) processed, reaches temperature using control computer (3) calibration
The key position of parameter threshold prejudges the position that secondary gas explosion occurs；The key position include working face into
Air way road, tailentry road, working face middle part, working face Air return corner, main air inlet belt tunnel, a preceding mine heat are dynamic
High temperature smoke affected area and close electrification electric appliance and abnormal Gas affected area after power disaster occurs；
Area monitoring node (1) includes zone controller (1-6) and the clock circuit that connects with the zone controller (1-6)
The input of (1-5) and communication module (1-7), zone controller (1-6) is terminated with temperature sensor (1-1), air velocity transducer (1-
2), the gas monitor (1-3) of gas sensor (1-8), the gas density for acquiring monitored region and gas flow with
And the oxygen monito (1-4) of the oxygen concentration and oxygen flow for acquiring monitored region；
Step 2: the time of secondary gas explosion occurs for the monitored region of estimation, process is as follows：
Step 201, the environmental parameter for obtaining monitored region：The ventilation in monitored region is monitored by air velocity transducer (1-2)
State, by gas monitor (1-3) and oxygen monito (1-4) monitors the gas bearing capacity in monitored region respectively and oxygen contains
Amount；
Step 202 judges whether monitored region is the region that high concentration gas explosion occurs：Pass through zone controller (1-6)
Monitoring parameters transformation period threshold value is set, according to the ring of environmental parameter and clock circuit (1-5) record obtained in step 201
The border Parameters variation time, whether monitored region is high concentration gas blast area after judging calamity, when gas monitor (1-3) and
Monitored region gas bearing capacity and oxygen content reach time of the gas explosion limit and are less than after oxygen monito (1-4) monitoring calamity
When the monitoring parameters transformation period threshold value, illustrates that monitored region is that high concentration gas blast area occurs, execute step
203；Otherwise, step 204 is executed；
The time Estimate that step 203, high concentration gas explosion occur, process are as follows：
Step 2031, according to formulaThe differential equation is solved, high concentration gas explosion can be obtained
Oxygen concentration changes undergone time t in region1Change undergone time t with methane concentration2, whereinV is high concentration gas blast area volume, q1It is mixed to flow into high concentration gas blast area
Close the flow of gas, q2For the flow of mixed gas in outflow high concentration gas blast area, c1To flow into high concentration gas explosion
The concentration of oxygen, c in region2To flow into the concentration of methane in high concentration gas blast area, c01For primary condition t1When=0,
The initial value of oxygen concentration,For oxygen concentration desired value to be achieved, c02For primary condition t2When=0, methane concentration
Initial value,For methane concentration desired value to be achieved；
Step 2032, according to formulaHigh concentration gas blast area oxygen is dense after calculating calamity
Degree becomes the 12% time T undergone1, gas density reach the time T that lower explosion limit 5% is undergone21And gas density reaches
The time T undergone to upper explosion limit 16%22；
The time that step 2033, estimation high concentration gas explosion occur：When oxygen concentration becomes 12% and undergone in step 2032
Time T1> T22When, high concentration gas explosion does not occur；When oxygen concentration became for 12% time undergone in step 2032
T21≤T1≤T22When, time t that high concentration gas explosion occurs meets：T1+t3≤t≤T22+t3, wherein t3It is quick-fried to reach gas
The gas of the fried limit encounters the time of burning things which may cause a fire disaster；When oxygen concentration becomes the 12% time T undergone in step 20321<T21When, it is high
Time t that concentration gas explosion occurs meets：T21+t3≤t≤T22+t3；
The time Estimate that step 204, low concentration gas explosion occur, process are as follows：
Step 2041, according to formulaThe differential equation is solved, low concentration gas can be obtained
Oxygen concentration changes undergone time t' in blast area1Change undergone time t' with methane concentration2, whereinV' is low concentration gas blast area volume, q'1To flow into low concentration gas blast area
The flow of interior mixed gas, q'2For the flow of mixed gas in outflow low concentration gas blast area, c'1To flow into low concentration watt
The concentration of oxygen, c' in this blast area2To flow into the concentration of methane in low concentration gas blast area, c'01For primary condition
t'1When=0, the initial value of oxygen concentration, c'02For primary condition t'2When=0, the initial value of methane concentration；
Step 2042, according to formulaLow concentration gas blast area oxygen after calculating calamity
Concentration becomes the 12% time T' undergone1, gas density reach the time T' that lower explosion limit 5% is undergone21And gas is dense
Degree reaches the time T' that upper explosion limit 16% is undergone22；
The time that step 2043, estimation low concentration gas explosion occur：When oxygen concentration becomes 12% and undergone in step 2042
Time T'1> T'22When, time t' that low concentration gas explosion occurs meets：T'21+t'3≤t'≤T'22+t'3；Work as step
Oxygen concentration becomes the 12% time T' undergone in 204221≤T'1≤T'22When, the time t' of low concentration gas explosion generation
Meet：T'21+t'3≤t'≤T'1+t'3；When oxygen concentration becomes the 12% time T' undergone in step 20421<T'21When, it is low
Concentration gas explosion does not occur, wherein t'3Gas to reach the gas explosion limit encounters the time of burning things which may cause a fire disaster；
Step 3: the probability of secondary gas explosion occurs for the monitored region of estimation：According to methods of gas explosion fault tree analytic approach, watt
Probability P=P of this explosion1×P2×P3, wherein P1Reach the general of the gas explosion limit by monitoring region gas concentration after calamity
Rate and P1Met according to Ke Wade explosion triangles：P1=P1i, i=1~4 and P11=1 > P13> P12> P14=0, P11For gas
The probability of concentration gas explosion limit between 5%~16% and when oxygen concentration is more than 12%, P12For gas density between
Between 5%~16% and oxygen concentration be less than 12% when the gas explosion limit probability, P13It is more than between 16% for gas density
And oxygen concentration be less than 12% when the gas explosion limit probability, P14The gas explosion limit is general when being less than 5% for gas density
Rate, probability P12And probability P13It is all made of expert point rating method estimated probability value, P2By monitoring region after calamity in the presence of can cause watt
The probability of this explosion burning things which may cause a fire disaster, P3By monitoring the probability that region reaches the gas of the gas explosion limit and burning things which may cause a fire disaster meets after calamity；
Step 4: secondary gas explosion judgement result is shown and real-time storage：It is supervised simultaneously by multiple regions monitoring node (1)
Time and the probability of secondary gas explosion occur for the key position under well logging, and when by the judgement fructufy of corresponding position
Be transmitted to control computer (3), by display (4) can real time inspection judgement as a result, pass through memory (5) in real time preserve judgement
As a result.
2. secondary gas explosion determination method during mine heat power disaster assistance described in accordance with the claim 1, special
Sign is：Key position described in step 1 and step 4 includes in working face intake, tailentry road, working face
Portion, working face Air return corner, main air inlet belt tunnel, preceding mine heat power disaster occur after high temperature smoke affected area and
Close to electrification electric appliance and abnormal Gas affected area.
3. secondary gas explosion determination method during mine heat power disaster assistance described in accordance with the claim 1, special
Sign is：Probability in step 3Wherein, N is expert's number, p12jThe gas provided for jth position expert is dense
The probability of degree gas explosion limit between 5%~16% and when oxygen concentration is less than 12%, δjFor p12jCorresponding weight andp13jThe gas explosion when gas density provided for jth position expert is more than between 16% and oxygen concentration is less than 12%
The probability of the limit, δj' it is p13jCorresponding weight and
4. secondary gas explosion determination method during mine heat power disaster assistance described in accordance with the claim 1, special
Sign is：Probability in step 3Wherein, probability P21By monitoring the probability that region burning things which may cause a fire disaster is duration burning things which may cause a fire disaster after calamity
And P21=1, probability P22By monitoring the probability and 0≤P that region burning things which may cause a fire disaster is instantaneity burning things which may cause a fire disaster after calamity22≤1。
5. secondary gas explosion determination method during mine heat power disaster assistance described in accordance with the claim 1, special
Sign is：Probability P in step 33=1.
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| CN108131158B (en) * | 2017-12-06 | 2019-07-05 | 北京理工大学 | A kind of datonation-inhibition control method of underground fuel gas and system |
| CN108345734B (en) * | 2018-02-01 | 2019-10-15 | 西安科技大学 | A kind of explosion limit calculation method of mixed combustible gas body |
| CN115019479A (en) * | 2022-02-22 | 2022-09-06 | 深圳市朗鑫智能科技有限公司 | Method and system for processing gas leakage by using gas detection alarm |
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