Coal spontaneous combustion fire early warning method, device and equipment and storage medium
By implementing multi-dimensional parameter monitoring and a dual early warning mechanism, the problem of delayed early warning for coal spontaneous combustion fires has been solved, enabling early warning, reducing fire risks, and providing effective support for safe coal mine production.
Patent Information
- Application Number
- CN202511609195.4
- Authority / Receiving Office
- CN · China
- Patent Type
- Applications(China)
- Current Assignee / Owner
- Filing Date
- 2025-11-05
- Publication Date
- 2026-01-30
AI Technical Summary
In existing technologies, early warning methods for spontaneous combustion of coal rely on monitoring a single physical or chemical indicator, which leads to delayed warnings and makes it difficult to capture characteristic changes in the spontaneous combustion process of coal in a timely manner, which may result in a fire.
By simultaneously acquiring multi-dimensional dynamic parameters such as coal temperature, carbon monoxide concentration, ethylene concentration, methane concentration, channel wind speed, and oxygen concentration, and combining correction coefficients and weight allocation logic, a dual early warning judgment dimension is constructed. The risk level is dynamically adjusted using the carbon monoxide growth rate and generation amount to achieve early warning.
It enables early warning of coal spontaneous combustion fires, reduces the probability of fires, improves the timeliness and accuracy of warnings, and provides a reliable guarantee for safe production in coal mines.
Smart Images
Figure CN121438522A_ABST
Abstract
Description
TECHNICAL FIELD
[0001] The present application relates to the technical field of computers, and in particular to a coal spontaneous combustion fire warning method, device, equipment and storage medium. BACKGROUND
[0002] Coal spontaneous combustion fire can bring great safety threat and economic loss to coal mine production, so an effective warning method is crucial. At present, the traditional coal spontaneous combustion fire warning method mainly relies on single physical or chemical indicators for monitoring, such as monitoring the temperature change of the coal body by arranging temperature sensors, or only detecting the concentration of carbon monoxide gas in the roadway.
[0003] Single indicator monitoring is difficult to fully capture the characteristic changes in the coal spontaneous combustion process. When a certain indicator reaches the warning threshold, the coal spontaneous combustion may have developed to a serious stage, resulting in delayed warning, untimely warning, or even fire. SUMMARY
[0004] The present application provides a coal spontaneous combustion fire warning method, device, equipment and storage medium, which can timely warn of coal spontaneous combustion fire.
[0005] To achieve the above purpose, the present application adopts the following technical solutions: In a first aspect, the present application provides a coal spontaneous combustion fire warning method, comprising: obtaining the basic parameters of the target coal seam, obtaining the dynamic parameters of the target coal seam, the dynamic parameters including the first coal body temperature, the first carbon monoxide concentration, the first ethylene concentration, the first gas concentration, the first channel wind speed, the first channel wind volume and the first oxygen concentration; determining the first warning information based on the first coal body temperature, the first carbon monoxide concentration, the first ethylene concentration, the first gas concentration, the first channel wind speed and the first oxygen concentration; determining the carbon monoxide growth rate based on the first carbon monoxide concentration, determining the carbon monoxide generation amount based on the first carbon monoxide concentration and the first channel wind volume; determining the second warning information according to the carbon monoxide growth rate and the carbon monoxide generation amount; when the first warning information and the second warning information both represent the existence of fire risk, a fire warning prompt is given.
[0006] Optionally, the determination of the first warning information based on the first coal body temperature, the first carbon monoxide concentration, the first ethylene concentration, the first gas concentration, the first channel wind speed and the first oxygen concentration comprises: According to the first gas concentration, the first channel wind speed and a first correction coefficient, the first carbon monoxide concentration is corrected to obtain a second carbon monoxide concentration; according to the first gas concentration, the first channel wind speed and a second correction coefficient, the first ethylene concentration is corrected to obtain a second ethylene concentration; according to the first oxygen concentration, the coal body fragmentation degree and a third correction coefficient, the first coal body temperature is corrected to obtain a second coal body temperature; A first weight of the second coal body temperature, a second weight of the second carbon monoxide concentration, a third weight of the second ethylene concentration and a fourth weight of the first oxygen concentration are obtained; According to the second coal body temperature, the first weight, the second carbon monoxide concentration, the second weight, the second ethylene concentration, the third weight, the first oxygen concentration and the fourth weight, a first early warning information is determined.
[0007] Optionally, the determining the first early warning information according to the second coal body temperature, the first weight, the second carbon monoxide concentration, the second weight, the second ethylene concentration, the third weight, the first oxygen concentration and the fourth weight comprises: According to the second coal body temperature, the first weight, the second carbon monoxide concentration, the second weight, the second ethylene concentration, the third weight, the first oxygen concentration and the fourth weight, a first early warning value is determined. According to the coal body fragmentation degree, a fourth correction coefficient corresponding to the coal body fragmentation degree, a coal seam buried depth, a fifth correction coefficient corresponding to the coal seam buried depth, the first early warning value is corrected to obtain a second early warning value; According to the second early warning value, the first early warning information is determined.
[0008] Optionally, the determining the first early warning information according to the second early warning value comprises: If the second early warning value is greater than a first threshold value, a first early warning information representing a fire risk is obtained; If the second early warning value is less than or equal to the first threshold value, a first early warning information representing no fire risk is obtained.
[0009] Optionally, the first threshold value is determined by the following method: A second threshold value is obtained, and a coal seam water content is obtained; According to the coal seam water content, a sixth correction coefficient corresponding to the coal seam water content, the first gas concentration, a seventh correction coefficient corresponding to the first gas concentration and a gas concentration threshold value, the second threshold value is corrected to obtain the first threshold value.
[0010] Optionally, determining the second early warning information based on the carbon monoxide growth rate and the carbon monoxide production includes: Based on the amount of carbon monoxide generated, the risk level is determined to be Level 1; If the carbon monoxide growth rate exceeds the growth rate threshold for multiple consecutive periods, the risk level is raised to Level 2; if the carbon monoxide growth rate does not exceed the growth rate threshold for multiple consecutive periods, the risk level remains at Level 1. Based on the risk level, the second early warning information is determined.
[0011] Optionally, determining the second early warning information based on the risk level includes: If the risk level is lower than the level threshold, a second early warning message indicating that there is no fire risk is obtained; if the risk level is greater than or equal to the level threshold, a second early warning message indicating that there is a fire risk is obtained.
[0012] Secondly, this application provides a device for early warning of spontaneous combustion fires in coal, comprising: The acquisition module is used to acquire the basic parameters of the target coal seam and the dynamic parameters of the target coal seam. The dynamic parameters include the first coal body temperature, the first carbon monoxide concentration, the first ethylene concentration, the first gas concentration, the first channel wind speed, the first channel air volume, and the first oxygen concentration. The processing module determines a first warning message based on the first coal temperature, the first carbon monoxide concentration, the first ethylene concentration, the first gas concentration, the first channel wind speed, and the first oxygen concentration; it determines the carbon monoxide growth rate based on the first carbon monoxide concentration, and determines the carbon monoxide generation amount based on the first carbon monoxide concentration and the first channel airflow; and it determines a second warning message based on the carbon monoxide growth rate and the carbon monoxide generation amount. The early warning module provides a fire warning when both the first and second early warning messages indicate a fire risk.
[0013] Thirdly, this application provides a computing device, including a memory and a processor; The memory stores one or more computer programs, the one or more computer programs including instructions; when the instructions are executed by the processor, the computing device performs the method as described in any one of the first aspects.
[0014] Fourthly, this application provides a computer-readable storage medium for storing a computer program for performing the method as described in any one of the first aspects.
[0015] From the above technical solutions, the present application has at least the following beneficial effects: In terms of early warning and timeliness, the present application breaks through the limitations of traditional methods relying on a single parameter and early warning lag, and a more comprehensive feature monitoring system is constructed by synchronously acquiring first coal body temperature, first carbon monoxide concentration, first ethylene concentration, first gas concentration, first channel wind speed, first channel air volume and first oxygen concentration multi-dimensional dynamic parameters. At the same time, by calculating the carbon monoxide growth rate and the carbon monoxide generation amount and correlating the risk level dynamic adjustment, the initial subtle changes of coal spontaneous combustion can be captured, and the early warning signal can be sent when the fire hazard is in the budding stage, so as to reserve sufficient time for on-site disposal and greatly reduce the probability of fire occurrence.
[0016] In terms of early warning accuracy, a multiple correction mechanism and weight distribution logic are introduced, the gas concentration is corrected by the first gas concentration, the first channel wind speed and the like, the first coal body temperature is corrected in combination with the first oxygen concentration and the coal body fragmentation degree, the early warning value is corrected according to the coal body fragmentation degree and the coal seam buried depth, and the early warning threshold is dynamically adjusted based on the coal seam water content and the gas concentration, so as to effectively avoid the interference of a single environmental factor or parameter error on the early warning result. In addition, the early warning prompt is triggered by double verification of the first early warning information and the second early warning information, which further reduces the false positive and false negative risk and improves the reliability of the early warning result.
[0017] Overall, the method realizes early warning of coal spontaneous combustion fire risk, provides a powerful guarantee for coal mine safety production, and can reduce personnel casualties and economic losses caused by fire.
[0018] It should be understood that the description of technical features, technical solutions, beneficial effects or similar language in the present application does not imply that all features and advantages can be achieved in any single embodiment. On the contrary, it can be understood that the description of a feature or a beneficial effect means that the specific technical feature, technical solution or beneficial effect is included in at least one embodiment. Therefore, the description of technical features, technical solutions or beneficial effects in the specification does not necessarily refer to the same embodiment. Further, the technical features, technical solutions and beneficial effects described in the embodiments can be combined in any appropriate manner. Those skilled in the art will understand that the embodiments can be implemented without one or more specific technical features, technical solutions or beneficial effects of a particular embodiment. In other embodiments, additional technical features and beneficial effects can be identified in specific embodiments that do not embody all embodiments. BRIEF DESCRIPTION OF DRAWINGS
[0019] Figure 1 A flowchart of a coal spontaneous combustion fire warning method provided by the embodiments of the present application; Figure 2A schematic diagram of a coal spontaneous combustion fire early warning device provided in an embodiment of this application; Figure 3 This is a schematic diagram of a computing device provided in an embodiment of this application. Detailed Implementation
[0020] The terms "first," "second," and "third," etc., used in this application specification and accompanying drawings are used to distinguish different objects, not to limit a specific order.
[0021] In the embodiments of this application, the terms "exemplary" or "for example" are used to indicate that something is an example, illustration, or description. Any embodiment or design that is described as "exemplary" or "for example" in the embodiments of this application should not be construed as being more preferred or advantageous than other embodiments or designs. Specifically, the use of the terms "exemplary" or "for example" is intended to present the relevant concepts in a specific manner.
[0022] Coal spontaneous combustion is a complex process involving multiple stages such as coal-oxygen recombination, heat accumulation, and gas release, and is influenced by a combination of factors including coal quality, coal seam thickness, moisture content, and ventilation conditions. Monitoring a single indicator is insufficient to comprehensively capture the characteristic changes during coal spontaneous combustion. When a certain indicator reaches the warning threshold, the spontaneous combustion may have already progressed to a more severe stage, leading to a delayed warning. Furthermore, due to significant differences in conditions among different coal seams, fixed warning thresholds cannot adapt to various situations, easily resulting in false alarms (such as a brief fluctuation in an indicator during normal production triggering a warning) or missed alarms (such as an indicator not reaching the fixed threshold but the coal already being in the early stages of spontaneous combustion).
[0023] In view of this, embodiments of this application provide a method for early warning of spontaneous combustion fires in coal, which can be executed by a processing device. This processing device can be a terminal or a server. Terminals include, but are not limited to, smartphones, tablets, laptops, personal digital assistants, or smart wearable devices. The server can be a cloud server, such as a central server in a central cloud computing cluster or an edge server in an edge cloud computing cluster. Alternatively, the server can be a server in a local data center. A local data center refers to a data center directly controlled by the user.
[0024] In order to solve the problems of traditional single index monitoring, such as difficult to fully capture the spontaneous combustion characteristics and early warning lag, the dynamic parameters such as coal temperature, various gas concentrations and ventilation parameters are synchronously collected to realize the all-round perception of the spontaneous combustion process. The correction coefficient and weight distribution are introduced to eliminate the interference of environmental factors on the monitoring parameters and improve the data accuracy. Then, the dual early warning judgment dimensions are respectively constructed based on the static parameters (such as coal fragmentation and coal seam depth) and dynamic parameters (such as carbon monoxide growth rate), and the early warning is triggered only when both of them indicate the risk, so as to achieve the early warning goal and provide reliable guarantee for the safety production of coal mine.
[0025] In order to make the technical solutions of the present application clearer and easier to understand, a method for coal spontaneous combustion fire warning provided by the embodiments of the present application is introduced below in combination with the drawings. As shown in the figure, it is a flow chart of the method for coal spontaneous combustion fire warning provided by the embodiments of the present application. The method comprises: Figure 1 S201, the processing device acquires the basic parameters of the target coal seam and acquires the dynamic parameters of the target coal seam, and the dynamic parameters include the first coal temperature, the first carbon monoxide concentration, the first ethylene concentration, the first gas concentration, the first channel wind speed, the first channel air volume and the first oxygen concentration.
[0026] The target coal seam refers to a specific coal seam area which needs to be monitored for the risk of coal spontaneous combustion in the process of coal mining, and can be divided into key areas such as goaf, working face corner and residual coal accumulation area according to the mining progress and geological conditions, which is the specific object of monitoring and early warning.
[0027] The basic parameters are static parameters reflecting the inherent properties, geological background and environmental basement characteristics of the target coal seam, which do not change with the short-term changes of coal spontaneous combustion process or mining operation, and are the basis for dynamic parameter correction, weight distribution and threshold setting.
[0028] The dynamic parameters refer to the parameters that fluctuate in real time with the changes of coal spontaneous combustion evolution process and ventilation conditions, which can directly reflect the dynamic characteristics such as heat accumulation, gas release and air flow influence of coal spontaneous combustion.
[0029] The first coal temperature is the temperature data of the coal body itself in the key area (such as goaf and working face corner) of the target coal seam collected by the processing device through the temperature sensor, which is a direct representation of heat accumulation of coal spontaneous combustion, and the first coal temperature will rise slowly in the initial stage of coal spontaneous combustion.
[0030] The first carbon monoxide concentration is the real-time concentration of carbon monoxide in the air flow of the target area monitored by the processing device through the CO sensor, and carbon monoxide is a characteristic gas released in the early stage of coal spontaneous combustion, and the change of its concentration can reflect the oxidation degree in the initial stage of spontaneous combustion.
[0031] The first ethylene concentration is the real-time concentration of ethylene in the air flow in the target area collected by the ethylene sensor of the processing device. Ethylene is a characteristic gas in the late stage of coal spontaneous combustion, and its presence usually means that spontaneous combustion has entered an active stage.
[0032] The first gas concentration is the real-time concentration of gas such as methane in the target area (such as the boundary of the goaf or the return air flow) monitored by the gas sensor of the processing device. Gas can interfere with the monitoring of spontaneous combustion gases, and in a high-gas environment, the coupling risk of spontaneous combustion and explosion needs to be considered.
[0033] The first channel wind speed is the real-time speed of the air flow in the target coal seam ventilation channel (such as a leakage channel or a roadway) collected by the wind speed sensor of the processing device. Wind speed directly affects heat diffusion and gas migration, and is a key factor in correcting gas concentration and adjusting parameter weights.
[0034] The first channel air volume is the volume of air flow per unit time through the channel calculated based on the first channel wind speed and the cross-sectional area of the ventilation channel or directly collected by the air volume sensor.
[0035] The first oxygen concentration is the real-time oxygen content of the target area (such as different partitions of the goaf) monitored by the oxygen sensor of the processing device. Oxygen is a necessary condition for coal oxidation reaction, and changes in its concentration can reflect the activity level of coal-oxygen combination.
[0036] S202, the processing device determines the first warning information based on the first coal body temperature, the first carbon monoxide concentration, the first ethylene concentration, the first gas concentration, the first channel wind speed, and the first oxygen concentration.
[0037] Specifically, first, the processing device corrects the first carbon monoxide concentration based on the first gas concentration, the first channel wind speed, and the first correction coefficient to obtain a second carbon monoxide concentration; corrects the first ethylene concentration based on the first gas concentration, the first channel wind speed, and the second correction coefficient to obtain a second ethylene concentration; and corrects the first coal body temperature based on the first oxygen concentration, the coal body fragmentation degree, and the third correction coefficient to obtain a second coal body temperature.
[0038] The original first carbon monoxide concentration can be affected by the first gas concentration and the wind speed. In the underground environment of a coal mine, gas (mainly composed of methane) and carbon monoxide often appear at the same time, and this coexistence can cause the measurement results of the monitoring device to be inaccurate, resulting in false data or biased data. High wind speed can dilute the gas concentration.
[0039] wherein the normalization formula of the wind speed is:
[0040] wherein, denotes the normalized first channel wind speed, Indicates the wind speed of the first channel. This represents the minimum wind speed. This indicates the maximum wind speed.
[0041] The normalization formula for gas concentration is:
[0042] in, This represents the normalized first gas concentration. Indicates the first gas concentration. This represents the minimum gas concentration. This indicates the maximum value of the gas concentration.
[0043] The correction formula for the original carbon monoxide concentration is:
[0044] in, This indicates the second carbon monoxide concentration. This indicates the first carbon monoxide concentration. This represents the first correction factor.
[0045] Ethylene, as a characteristic gas in the middle and late stages, is also affected by gas concentration and wind speed. The correction logic is similar to that for carbon monoxide, but the correction coefficients are different. The correction expression is as follows:
[0046] in, Indicates the second ethylene concentration. Indicates the first ethylene concentration. This represents the second correction factor.
[0047] The initial temperature of the first coal body is affected by the initial oxygen concentration and the coal fragmentation: a higher initial oxygen concentration provides more raw materials for the coal-oxygen complex reaction, resulting in a more intense oxidation and exothermic process, causing the initial temperature data to be lower than the actual auto-ignition temperature, requiring upward correction; a higher coal fragmentation results in a larger specific surface area of the coal blocks, a wider contact area with oxygen, a more complete oxidation reaction, and the release of more heat, also leading to an underestimation of the initial temperature data, requiring upward correction. First, the initial oxygen concentration is normalized, expressed as:
[0048] in, This represents the normalized first oxygen concentration. Indicates the first oxygen concentration. This represents the minimum oxygen concentration. This indicates the maximum value of the oxygen concentration.
[0049] Then, the original first coal body temperature is corrected, and the correction formula is:
[0050] wherein, represents the second coal body temperature, represents the first coal body temperature, represents the first oxygen concentration, represents the coal body fragmentation degree, represents the third correction coefficient.
[0051] The coal body fragmentation degree is a dimensionless index quantifying the degree of coal body fragmentation, reflecting the proportion of coal samples with a particle size less than 3 mm, and the calculation result is presented in percentage form, and the expression is:
[0052] wherein, represents the total mass of the coal sample, represents the mass of the coal sample with a particle size less than 3 mm. By calculating the percentage of the mass of the coal sample with a particle size less than 3 mm in the total mass of the coal sample, the degree of fragmentation of the coal body is quantified, and the higher the fragmentation degree, i.e. the greater the value, the smaller the particle size of the coal body, the greater the specific surface area, and the wider the contact area with oxygen, and the higher the risk of coal spontaneous combustion.
[0053] Secondly, the processing device obtains a first weight of the second coal body temperature, a second weight of the second carbon monoxide concentration, a third weight of the second ethylene concentration, and a fourth weight of the first oxygen concentration.
[0054] Different parameters have different sensitivities at different stages of coal spontaneous combustion, and their contribution degrees need to be reflected through weight distribution. The weight values are determined based on experimental data and field experience, and the sum is 1, i.e. .
[0055] is the first weight corresponding to the second coal body temperature, which has the greatest impact on the medium-term temperature of spontaneous combustion, the value range of can be [0.3, 0.4]; is the second weight corresponding to the second carbon monoxide concentration, which is an early core indicator, the value range of can be [0.25, 0.35]; is the third weight corresponding to the second ethylene concentration, which is a middle-late indicator, the value range of can be [0.15, 0.25]; is the fourth weight corresponding to the first oxygen concentration, which reflects the basic condition of oxidation, the value range of can be [0.1, 0.2].
[0056] Finally, the processing device determines the first early warning information according to the second coal body temperature, the first weight, the second carbon monoxide concentration, the second weight, the second ethylene concentration, the third weight, the first oxygen concentration, and the fourth weight.
[0057] The first early warning information is the conclusive information finally output by the processing device after comprehensive analysis of multiple parameters, directly representing whether the target coal seam has a coal spontaneous combustion risk, and is usually divided into two categories: having a fire risk or temporarily not having a fire risk, and is the basis for early warning decision.
[0058] The specific way to determine the first early warning information is: The processing device determines the first early warning value according to the second coal body temperature, the first weight, the second carbon monoxide concentration, the second weight, the second ethylene concentration, the third weight, the first oxygen concentration, and the fourth weight.
[0059] The first early warning value is obtained by weighting and summing the corresponding weights of the corrected key dynamic parameters (the second coal body temperature, the second carbon monoxide concentration, the second ethylene concentration, and the first oxygen concentration). Before weighting and summing, the key dynamic parameters are first normalized, and the calculation expression of normalization is:
[0060] Among them, represents the normalized second coal body temperature, represents the minimum value of the temperature, represents the maximum value of the temperature.
[0061]
[0062] Among them, represents the normalized second carbon monoxide concentration, represents the minimum value of the carbon monoxide concentration, represents the maximum value of the carbon monoxide concentration.
[0063]
[0064] Among them, represents the normalized second ethylene concentration, represents the minimum value of the ethylene concentration, represents the maximum value of the ethylene concentration.
[0065] Then, the normalized key dynamic parameters are weighted and summed according to the corresponding weights, and the expression is:
[0066] Among them, represents the first early warning value.
[0067] The first early warning value is corrected by using the coal body fragmentation degree, the fourth correction coefficient corresponding to the coal body fragmentation degree, the coal seam depth, and the fifth correction coefficient corresponding to the coal seam depth, to obtain a second early warning value.
[0068] The second early warning value is a deep optimization of the first early warning value, which introduces inherent basic parameters (coal body fragmentation degree and coal seam depth) and corresponding correction coefficients for adjustment, making up for the deficiency that the first early warning value does not consider the difference in spontaneous combustion tendency of the coal seam. Ultimately, a comprehensive quantitative index reflecting the dynamic evolution state and inherent risk characteristics is formed, which is a direct basis for judging the first early warning information. First, the coal seam depth is normalized, and the expression is:
[0069] wherein, denotes the normalized coal seam depth, denotes the coal seam depth, denotes the minimum value of the coal seam depth, denotes the maximum value of the coal seam depth.
[0070] Then, the optimization expression of the second early warning value is:
[0071] wherein, denotes the second early warning value, denotes the fourth correction coefficient, denotes the fifth correction coefficient, denotes the coal seam depth.
[0072] Finally, the processing device determines the first early warning information according to the second early warning value.
[0073] If the second early warning value is greater than the first threshold value, the first early warning information representing the existence of fire risk is obtained; if the second early warning value is less than or equal to the first threshold value, the first early warning information representing the non-existence of fire risk is obtained.
[0074] When the second early warning value is greater than the first threshold value, it means that the comprehensive risk quantitative index after dynamic parameter fusion and correction of the inherent characteristics of the coal seam has broken through the safety critical line customized for the current coal seam, which means that the characteristic signs of coal spontaneous combustion combined with the inherent risk characteristics of the coal seam have reached a level that needs to be vigilant, and therefore the first early warning information representing the existence of fire risk is obtained. When the second early warning value is less than or equal to the first threshold value, it means that the comprehensive risk index is still within the safe range, and even if there is a weak parameter fluctuation, the overall risk has not broken through the critical standard, and therefore the first early warning information representing the non-existence of fire risk is obtained.
[0075] The first threshold value is not a fixed value, but needs to be adjusted in combination with the coal seam moisture content, gas concentration and other basic parameters. The higher the coal seam moisture content, the more difficult the spontaneous combustion of the coal seam, thereby increasing the first threshold value. The high gas concentration, the risk of the coal seam is superimposed, thereby reducing the first threshold value. The first threshold value can be determined by the following method: First, the processing device obtains a second threshold value, obtains the coal seam moisture content; and then corrects the second threshold value according to the coal seam moisture content, the sixth correction coefficient corresponding to the coal seam moisture content, the first gas concentration, the seventh correction coefficient corresponding to the first gas concentration and the gas concentration threshold value, to obtain the first threshold value.
[0076] The second threshold value, as the basic reference value of the first threshold value, is an initial critical value preset based on a large number of coal seam historical spontaneous combustion cases, laboratory simulation data and industry safety standards. The value reflects the critical level of coal spontaneous combustion risk without considering the differences in moisture content and gas concentration.
[0077] The coal seam moisture content is a basic parameter of the target coal seam, which refers to the percentage of the mass of water contained in the coal body to the dry mass of the coal body, which is obtained by field sampling and drying experiment or long-term monitoring to obtain the average value, and directly affects the heat accumulation speed of coal spontaneous combustion.
[0078] The correction expression of the first threshold value is:
[0079] Among them, the first threshold value is represented by T1, the second threshold value is represented by T2, the sixth correction coefficient is represented by K6, the coal seam moisture content is represented by M, the seventh correction coefficient is represented by K7, the gas concentration threshold value is represented by C, and the value is between 0 and 1.
[0080] Among them, can be calibrated by experiment, which is a conventional experimental means that can be repeated by those skilled in the art, and will not be described here.
[0081] Through this correction process, the original second threshold value is adjusted to the first threshold value that adapts to the current coal seam moisture content and fits the real-time gas concentration environment, ensuring that the subsequent judgment logic of comparing the second warning value with the first threshold value is more accurate, and solving the problem of poor adaptability and high false alarm rate of the traditional fixed threshold value.
[0082] S203, the processing device determines the carbon monoxide growth rate based on the first carbon monoxide concentration, and determines the carbon monoxide generation amount based on the first carbon monoxide concentration and the first channel air volume.
[0083] The carbon monoxide growth rate is an indicator that quantifies how fast the carbon monoxide concentration changes within a continuous monitoring period. It reflects the accelerating or slowing trend of the spontaneous combustion oxidation reaction of coal. The higher the growth rate, the faster the risk of spontaneous combustion escalates.
[0084] By calculating the difference in the first carbon monoxide concentration over two consecutive monitoring periods, and then comparing this difference with the first carbon monoxide concentration of the previous period, the carbon monoxide growth rate, which reflects the rate of concentration change, can be obtained. The calculation expression is as follows:
[0085] in, Indicates the carbon monoxide growth rate. Indicates the first The first carbon monoxide concentration within each monitoring period, Indicates the first The first carbon monoxide concentration within each monitoring cycle.
[0086] Carbon monoxide generation refers to the total amount of carbon monoxide actually released by the coal seam in the target area per unit time.
[0087] Multiply the current carbon monoxide concentration in the area by the airflow rate in the first channel to obtain the total amount of carbon monoxide passing through the channel per unit time. The calculation expression is as follows:
[0088] in, This indicates the amount of carbon monoxide produced. This indicates the air volume of the first channel.
[0089] S204. The treatment equipment determines the second early warning information based on the carbon monoxide growth rate and the amount of carbon monoxide generated.
[0090] The specific method is as follows: First, the treatment equipment determines the risk level to be Level 1 based on the amount of carbon monoxide generated. The equipment will pre-set a basic risk level standard corresponding to the amount of carbon monoxide generated, for example, by combining historical data: Corresponding to the low-risk basic level, Based on the corresponding medium-risk baseline level, the real-time calculated carbon monoxide generation is substituted into the baseline risk level standard to determine the initial risk level as Level 1.
[0091] If the carbon monoxide growth rate exceeds the growth rate threshold for several consecutive periods, the risk level will be raised to Level 2; if the carbon monoxide growth rate does not exceed the growth rate threshold for several consecutive periods, the risk level will remain at Level 1.
[0092] If the carbon monoxide growth rate If the growth rate threshold is exceeded for a plurality of consecutive periods, it indicates that the risk of spontaneous combustion is continuously increasing, for example, the amount of carbon monoxide generated from accelerates to the initial first level is raised to the second level; If the growth rate of carbon monoxide does not exceed the growth rate threshold for a plurality of consecutive periods, it indicates that the risk is in a stable state, and the first level is maintained.
[0093] Finally, the processing device determines the second early warning information according to the risk level. If the risk level is less than the level threshold, the second early warning information representing the absence of fire risk is obtained; if the risk level is greater than or equal to the level threshold, the second early warning information representing the presence of fire risk is obtained.
[0094] If the adjusted risk level is less than the level threshold, it indicates that neither the current oxidation intensity (amount of generation) nor the evolution trend (growth rate) has reached the critical level that requires attention, and the second early warning information represents the absence of fire risk.
[0095] If the adjusted risk level is greater than or equal to the level threshold, it indicates that the current oxidation intensity has reached the critical level, or the trend is accelerating to the critical level, and the second early warning information represents the presence of fire risk.
[0096] For example: Assuming that a coal mine sets the carbon monoxide generation standard as , which corresponds to the first level.
[0097] The growth rate threshold is , the consecutive period is 2 periods, and the level threshold is the second level. The actual situation of a certain coal mine is that the amount of carbon monoxide generated is , and the first level is determined. The growth rate of carbon monoxide for 2 consecutive periods is 1.2, which is greater than the growth rate threshold 1, and is upgraded to the second level. The second level is equal to the level threshold, so the second early warning information is that there is a fire risk.
[0098] S205, the processing device performs fire warning prompt when both the first early warning information and the second early warning information represent the presence of fire risk.
[0099] The first early warning information and the second early warning information are conclusions of judging the risk of coal spontaneous combustion from two independent and complementary dimensions. Both of them represent the presence of fire risk, which is a necessary condition for triggering the final warning.
[0100] The first early warning information is based on comprehensive quantitative analysis of dynamic parameters and inherent characteristics of coal seams; the second early warning information is based on dynamic monitoring of carbon monoxide generation and growth rate. Only when the judgment of the two dimensions points to the presence of risk, it is confirmed that the risk is systematic and continuous, rather than a false signal caused by single parameter fluctuation or local disturbance.
[0101] When the processing device confirms that both types of early warning information represent the existence of fire risk, the triggered fire warning prompt means that the risk has been double-checked and the corresponding emergency measures need to be taken immediately, such as intensifying on-site inspection, adjusting the ventilation system, spraying resistance agents, etc.
[0102] Based on the above description, the present application has the following beneficial effects: In terms of early warning and timeliness, the traditional method relying on a single parameter and lagging behind is broken through, and a more comprehensive feature monitoring system is constructed by synchronously acquiring first coal body temperature, first carbon monoxide concentration, first ethylene concentration, first gas concentration, first channel wind speed, first channel air volume and first oxygen concentration. At the same time, by calculating the carbon monoxide growth rate and the carbon monoxide generation amount and associating with the risk level dynamic adjustment, the subtle changes in the early stage of coal spontaneous combustion can be captured, and the early warning signal can be sent when the fire hazard is in the embryonic stage, which reserves sufficient time for on-site disposal and greatly reduces the probability of fire.
[0103] In terms of early warning accuracy, a multiple correction mechanism and a weight distribution logic are introduced, the gas concentration is corrected by the first gas concentration, the first channel wind speed, the first coal body temperature is corrected in combination with the first oxygen concentration, the coal body fragmentation degree, and the early warning value is corrected according to the coal body fragmentation degree and the coal seam depth, and the early warning threshold is dynamically adjusted based on the coal seam water content and the gas concentration, which effectively avoids the interference of a single environmental factor or parameter error on the early warning result. In addition, the early warning prompt is triggered by double verification of the first early warning information and the second early warning information, which further reduces the risk of false positives and false negatives and improves the reliability of the early warning result.
[0104] Overall, the method realizes early warning of coal spontaneous combustion fire risk, provides a strong guarantee for coal mine safety production, and can reduce personnel casualties and economic losses caused by fire.
[0105] The above Figure 1 The method for early warning of coal spontaneous combustion fire provided by the embodiments of the present application is described in detail, and the device and equipment provided by the embodiments of the present application will be introduced below with reference to the drawings.
[0106] As Figure 2 shown, the figure is a schematic diagram of a device for early warning of coal spontaneous combustion fire provided by an embodiment of the present application, which comprises: The acquisition module 301 is configured to acquire the basic parameters of the target coal seam and the dynamic parameters of the target coal seam, and the dynamic parameters include first coal body temperature, first carbon monoxide concentration, first ethylene concentration, first gas concentration, first channel wind speed, first channel air volume and first oxygen concentration. The processing module 302 is configured to determine first early warning information based on the first coal body temperature, the first carbon monoxide concentration, the first ethylene concentration, the first gas concentration, the first channel wind speed, and the first oxygen concentration; determine a carbon monoxide growth rate based on the first carbon monoxide concentration, and determine a carbon monoxide generation amount based on the first carbon monoxide concentration and a first channel wind volume; and determine second early warning information according to the carbon monoxide growth rate and the carbon monoxide generation amount. The early warning module 303 is configured to perform fire early warning prompting when the first early warning information and the second early warning information both represent that there is a fire risk.
[0107] Optionally, the acquisition module 301 is configured to acquire a first weight of the second coal body temperature, a second weight of the second carbon monoxide concentration, a third weight of the second ethylene concentration, and a fourth weight of the first oxygen concentration. The processing module 302 is configured to correct the first carbon monoxide concentration according to the first gas concentration, the first channel wind speed, and a first correction coefficient to obtain a second carbon monoxide concentration; correct the first ethylene concentration according to the first gas concentration, the first channel wind speed, and a second correction coefficient to obtain a second ethylene concentration; correct the first coal body temperature according to the first oxygen concentration, a coal body fragmentation degree, and a third correction coefficient to obtain a second coal body temperature; and determine first early warning information according to the second coal body temperature, the first weight, the second carbon monoxide concentration, the second weight, the second ethylene concentration, the third weight, the first oxygen concentration, and the fourth weight.
[0108] Optionally, the processing module 302 is configured to determine a first early warning value according to the second coal body temperature, the first weight, the second carbon monoxide concentration, the second weight, the second ethylene concentration, the third weight, the first oxygen concentration, and the fourth weight. The first early warning value is corrected by using the coal body fragmentation degree, a fourth correction coefficient corresponding to the coal body fragmentation degree, a coal seam buried depth, and a fifth correction coefficient corresponding to the coal seam buried depth to obtain a second early warning value. The first early warning information is determined according to the second early warning value.
[0109] Optionally, the processing module 302 is configured to obtain the first early warning information representing that there is a fire risk if the second early warning value is greater than a first threshold value. The first early warning information representing that there is no fire risk is obtained if the second early warning value is less than or equal to the first threshold value.
[0110] Optionally, the acquisition module 301 is configured to acquire a second threshold value and a coal seam water content. The processing module 302 is specifically used to correct the second threshold according to the coal seam moisture content, the sixth correction coefficient corresponding to the coal seam moisture content, the first gas concentration, the seventh correction coefficient corresponding to the first gas concentration, and the gas concentration threshold, so as to obtain the first threshold.
[0111] Optionally, the processing module 302 is specifically used to determine the risk level as a first level based on the carbon monoxide generation; if the carbon monoxide growth rate exceeds the growth rate threshold for multiple consecutive periods, then raise the risk level to a second level; if the carbon monoxide growth rate does not exceed the growth rate threshold for multiple consecutive periods, then maintain the risk level as a first level; and determine the second warning information based on the risk level.
[0112] Optionally, the processing module 302 is specifically used to obtain second early warning information indicating that there is no fire risk if the risk level is lower than the level threshold; and to obtain second early warning information indicating that there is fire risk if the risk level is greater than or equal to the level threshold.
[0113] The coal spontaneous combustion fire early warning device according to the embodiments of this application can correspond to the execution of the method described in the embodiments of this application, and the other operations and / or functions of each module / unit of the coal spontaneous combustion fire early warning device are respectively for implementing Figure 1 For the sake of brevity, the corresponding processes of each method in the illustrated embodiments will not be described in detail here.
[0114] This application also provides a computing device. For example... Figure 3 As shown in the figure, this is a schematic diagram of a computing device provided in an embodiment of this application. The computing device 700 includes a bus 701, a processor 702, a communication interface 703, and a memory 704. The processor 702, the memory 704, and the communication interface 703 communicate with each other via the bus 701.
[0115] The 701 bus can be a Peripheral Component Interconnect (PCI) bus or an Extended Industry Standard Architecture (EISA) bus, etc. Buses can be categorized as address buses, data buses, control buses, etc. For ease of representation, Figure 3 The bus is represented by a single thick line, but this does not mean that there is only one bus or one type of bus.
[0116] The processor 702 can be any one or more of a central processing unit (CPU), a graphics processing unit (GPU), a microprocessor (MP), or a digital signal processor (DSP), etc.
[0117] The communication interface 703 is configured to communicate with the outside.
[0118] The memory 704 can include a volatile memory, such as a random access memory (RAM), and / or a non-volatile memory, such as a read-only memory (ROM), a floppy disk, a hard disk, or a solid state drive (SSD).
[0119] The memory 704 stores executable code, and the processor 702 executes the executable code to perform the method for coal spontaneous combustion fire warning.
[0120] Specifically, in the case of the embodiment shown, and Figure 2 In the case of the embodiment shown, and Figure 2 In the case of the embodiment shown, and Figure 2 In the case of the embodiment shown, and
[0121] The embodiments of the present application also provide a computer readable storage medium. The computer readable storage medium can be any available medium or data storage device that can store data which can be available to a computing device, or a data center containing one or more available media, etc. The available medium can be a magnetic medium (such as a floppy disk, a hard disk, a magnetic tape), an optical medium (such as a DVD), or a semiconductor medium (such as a solid state disk), etc. The computer readable storage medium includes instructions, which instruct the computing device to execute the method for coal spontaneous combustion fire warning.
[0122] The embodiments of the present application further provide a computer program product including one or more computer instructions. When the computer instructions are loaded and executed on a computing device, all or part of the processes or functions described in the embodiments of the present application are generated.
[0123] The computer instructions can be stored in a computer readable storage medium or transmitted from one computer readable storage medium to another computer readable storage medium, for example, the computer instructions can be transmitted from one website, computer or data center to another website, computer or data center through wired (for example, coaxial cable, optical fiber, digital subscriber line) or wireless (for example, infrared, wireless, microwave, etc.).
[0124] The computer program product is executed by a computer, and the computer executes any of the methods of the coal spontaneous combustion fire warning method. The computer program product can be a software installation package, and when any of the methods of the coal spontaneous combustion fire warning method is needed, the computer program product can be downloaded and executed on the computer.
[0125] The description of the processes or structures corresponding to the respective figures focuses on different aspects, and the parts not described in detail in a certain process or structure can be referred to the related description of other processes or structures.
[0126] The above is only a specific implementation of the present application, but the protection scope of the present application is not limited to this, any change or replacement within the technical scope disclosed in the present application should be covered in the protection scope of the present application.
Claims
1. A method for early warning of coal spontaneous combustion fire, characterized in that, The method comprises: obtaining basic parameters of a target coal seam, and obtaining dynamic parameters of the target coal seam, the dynamic parameters comprising a first coal body temperature, a first carbon monoxide concentration, a first ethylene concentration, a first gas concentration, a first channel wind speed, a first channel wind volume, and a first oxygen concentration; determining first early warning information based on the first coal body temperature, the first carbon monoxide concentration, the first ethylene concentration, the first gas concentration, the first channel wind speed, and the first oxygen concentration; determining a carbon monoxide growth rate based on the first carbon monoxide concentration, and determining a carbon monoxide generation amount based on the first carbon monoxide concentration and the first channel wind volume; and determining second early warning information according to the carbon monoxide growth rate and the carbon monoxide generation amount; when the first early warning information and the second early warning information both represent a fire risk, performing a fire early warning prompt.
2. The method of claim 1, wherein, The determination of the first early warning information based on the first coal body temperature, the first carbon monoxide concentration, the first ethylene concentration, the first gas concentration, the first channel wind speed, and the first oxygen concentration comprises: correcting the first carbon monoxide concentration based on the first gas concentration, the first channel wind speed, and a first correction coefficient to obtain a second carbon monoxide concentration; correcting the first ethylene concentration based on the first gas concentration, the first channel wind speed, and a second correction coefficient to obtain a second ethylene concentration; and correcting the first coal body temperature based on the first oxygen concentration, a coal body fragmentation degree, and a third correction coefficient to obtain a second coal body temperature; obtaining a first weight of the second coal body temperature, a second weight of the second carbon monoxide concentration, a third weight of the second ethylene concentration, and a fourth weight of the first oxygen concentration; determining the first early warning information according to the second coal body temperature, the first weight, the second carbon monoxide concentration, the second weight, the second ethylene concentration, the third weight, the first oxygen concentration, and the fourth weight.
3. The method of claim 2, wherein, The determination of the first early warning information according to the second coal body temperature, the first weight, the second carbon monoxide concentration, the second weight, the second ethylene concentration, the third weight, the first oxygen concentration, and the fourth weight comprises: determining a first early warning value according to the second coal body temperature, the first weight, the second carbon monoxide concentration, the second weight, the second ethylene concentration, the third weight, the first oxygen concentration, and the fourth weight; correcting the first early warning value based on the coal body fragmentation degree, a fourth correction coefficient corresponding to the coal body fragmentation degree, a coal seam burial depth, and a fifth correction coefficient corresponding to the coal seam burial depth to obtain a second early warning value; and determining the first early warning information according to the second early warning value.
4. The method of claim 3, wherein, The determination of the first early warning information according to the second early warning value comprises: if the second early warning value is greater than a first threshold value, obtaining first early warning information representing a fire risk; if the second early warning value is less than or equal to the first threshold value, obtaining first early warning information representing no fire risk.
5. The method of claim 4, wherein, The first threshold value is determined in the following manner: obtain a second threshold value, and obtain a coal seam moisture content; correct the second threshold value according to the coal seam moisture content, a sixth correction coefficient corresponding to the coal seam moisture content, the first gas concentration, a seventh correction coefficient corresponding to the first gas concentration, and a gas concentration threshold value, to obtain a first threshold value.
6. The method of claim 1, wherein, The second warning information is determined according to the carbon monoxide growth rate and the carbon monoxide generation amount, and includes: According to the carbon monoxide generation amount, the risk level is determined to be a first level. If the carbon monoxide growth rate exceeds the growth rate threshold value for a plurality of consecutive periods, the risk level is increased to a second level; if the carbon monoxide growth rate does not exceed the growth rate threshold value for a plurality of consecutive periods, the risk level is maintained at the first level. The second warning information is determined according to the risk level.
7. The method of claim 6, wherein, The second warning information is determined according to the risk level, and includes: If the risk level is lower than a level threshold value, the second warning information representing the absence of fire risk is obtained; if the risk level is greater than or equal to the level threshold value, the second warning information representing the presence of fire risk is obtained.
8. A device for early warning of coal spontaneous combustion fire, characterized in that, The device includes: An acquisition module is configured to acquire a basic parameter of a target coal seam and a dynamic parameter of the target coal seam, the dynamic parameter including a first coal body temperature, a first carbon monoxide concentration, a first ethylene concentration, a first gas concentration, a first channel wind speed, a first channel wind volume, and a first oxygen concentration; A processing module is configured to determine a first warning information based on the first coal body temperature, the first carbon monoxide concentration, the first ethylene concentration, the first gas concentration, the first channel wind speed, and the first oxygen concentration; determine a carbon monoxide growth rate based on the first carbon monoxide concentration, and determine a carbon monoxide generation amount based on the first carbon monoxide concentration and the first channel wind volume; and determine a second warning information according to the carbon monoxide growth rate and the carbon monoxide generation amount; A warning module is configured to perform a fire warning prompt when the first warning information and the second warning information both represent the presence of fire risk.
9. A computing device, comprising: includes a memory and a processor; One or more computer programs are stored in the memory, and the one or more computer programs include instructions; when the instructions are executed by the processor, the computing device performs the method of any one of claims 1 to 7.
10. A computer-readable storage medium, characterized in that, The computer readable storage medium is used to store a computer program, and the computer program is used to execute the method of any one of claims 1 to 7.