Identification method of different types of dangerous sources of coal mine gas explosion accidents
Patent Information
- Application Number
- CN202610592880.9
- Authority / Receiving Office
- CN · China
- Patent Type
- Applications(China)
- Current Assignee / Owner
- Filing Date
- 2026-04-30
- Publication Date
- 2026-08-04
AI Technical Summary
[0005]本发明为了解决现有煤矿瓦斯爆炸危险源辨识方法存在局限、依赖历史数据经验、难精准挖掘因素关联的问题，提供一种用于煤矿瓦斯爆炸事故不同类型危险源的识别方法
本发明相较于煤矿瓦斯爆炸事故原来的危险源辨识，不再以人、机、环、管等单独的要素作为危险源，而是以瓦斯爆炸事故致因因素与瓦斯爆炸三角形构成因素的组合作为危险源，从而直接表征出事故致因源及作用对象，更重要的是，危险源中能够直接体现出被管控对象-致因因素，识别危险源后，可以直接对被管控对象采取管控措施，这种定义方法非常有利于安全管控。可有效为煤矿瓦斯爆炸事故防控提供科学、全面的技术支撑，相较于现有技术具备显著的推广应用价值。
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Abstract
Description
Technical Field
[0001] This invention pertains to the prevention and control of coal mine gas disasters, specifically a method for identifying different types of hazard sources in coal mine gas explosion accidents. Background Technology
[0002] Coal mine gas explosions are a core catastrophic risk to safe production in the coal industry. They are characterized by their suddenness, immense destructive power, and tendency to cause severe casualties and property damage, seriously threatening the lives of underground workers and the overall safety and order of mine operations. For a long time, gas explosions have consistently accounted for a high proportion of major and serious safety accidents in coal mines. Even with the rapid upgrading of intelligent mining technologies, the situation regarding coal mine safety remains severe and complex.
[0003] The gestation, evolution, and occurrence of coal mine gas explosions are the result of the coupling of multiple factors, involving hazardous substances, equipment operating conditions, worker behavior, production activities, and geological environmental conditions. The relationships between the various elements within the hazard source system of this type of accident are intricate, and there are complex interaction mechanisms in the spatiotemporal dimensions.
[0004] Currently, the gas explosion hazard identification theory used in coal mines has significant limitations. It struggles to directly characterize the core elements of an accident, and the identified hazards only reflect single basic elements such as personnel, machinery, environment, and pipelines. It cannot directly and clearly identify the causal source of a gas explosion accident and its corresponding target, making it difficult to establish a direct logical link between the hazard and the accident. Secondly, the identified hazards do not directly highlight the core object of safety management—the accident causative factors. This means that after hazard identification, it is impossible to directly formulate and implement control measures around this core object. A secondary analysis of the accident causative factors is required, which not only increases the intermediate steps in safety management but also reduces management efficiency. Summary of the Invention
[0005] To address the limitations of existing methods for identifying coal mine gas explosion hazards, such as reliance on historical data and experience, and difficulty in accurately identifying factor correlations, this invention provides a method for identifying different types of hazards in coal mine gas explosion accidents.
[0006] This invention adopts the following technical solution: a method for identifying different types of hazard sources in coal mine gas explosion accidents, comprising: S100: Based on the factor relationship diagram of gas explosion accidents in the coal mine production system, extract the causative factors that lead to gas accidents; S200: Constructing a coal mine gas explosion hazard source composed of causative factors and gas explosion triangle components; S300: Defines different types of hazards for coal mine gas explosions, including single-cause hazards and multi-cause hazards. S400: Based on statistical data of various parameters in the coal mine production process, establish a functional mapping relationship between the causative factors and the state of the constituent factors of the gas explosion triangle in the coal mine gas explosion hazard source; S500: Establish criteria for identifying coal mine gas explosion hazards corresponding to the single-cause hazard source and the multi-cause hazard source, respectively; S600: Perform the identification operation of coal mine gas explosion hazard sources in accordance with the aforementioned discrimination criteria.
[0007] In some embodiments, in S100, the factor relationship diagram includes: The first level is the accident result level, with the target node being a gas explosion. The triggering state of this node is determined by the states of the three core components of the gas explosion triangle at the next level. The second level is the core element layer of the explosion, which includes three primary nodes directly related to the gas explosion: gas concentration, oxygen concentration, and ignition source temperature. Their states directly determine the triggering state of the gas explosion node, and their own states are driven by the states of the next level and secondary nodes. The third level is the intermediate layer of cause-effect transmission, which is used to connect the secondary nodes of the underlying causal factors and the primary core elements. The secondary nodes of gas concentration include the extraction volume during mining in this working face, the absolute gas emission volume of the working face, and the gas volume of ventilation in the working face. Oxygen concentration directly corresponds to causative factors, including return airway volume and intake airway volume; The secondary nodes of ignition source temperature include artillery fire, electric sparks and arcs, electrostatic sparks, impact friction open flames, and coal spontaneous combustion open flames; The fourth level is the causal factor layer, which sets the causal factors that directly drive the state changes of the second-level nodes; Among them, the factors that cause the extraction volume in this working face include: extraction time, extraction negative pressure and extraction parameters of the top extraction roadway; The absolute gas emission at the working face includes the absolute gas emission of this coal seam and the absolute gas emission of adjacent seams; The causal factors of the absolute gas emission of this coal seam are subdivided into: the original gas content of this coal seam and the adsorbed gas content of this coal seam. The contributing factors to the adsorbed gas content in this coal seam are further subdivided into: the pre-mining gas extraction rate of this coal seam, the gas emission coefficient of the surrounding rock of this working face, the mining intensity of this coal seam working face, and the mining recovery rate of this coal seam working face; the contributing factors to the pre-mining gas extraction rate of this coal seam are further subdivided into: extraction time, extraction negative pressure, top extraction roadway extraction parameters, pressure relief effect of protective layer mining, and the permeability coefficient of this coal seam; the contributing factors to the mining intensity of this coal seam working face are further subdivided into: working face length and mining height; the contributing factors to the mining recovery rate of this coal seam working face are further subdivided into: mining height; The contributing factors to the absolute gas emission of adjacent layers include: working face length and mining height; The contributing factors to the amount of methane discharged from the working face include: methane concentration in the intake airway, methane concentration in the return airway, air volume in the return airway, and air volume in the intake airway. The causative factors of artillery fire include: the quality of the borehole sealing, the minimum resistance line, the quality of the detonating equipment, and the depth of the borehole; The causes of electric sparks and arcs include: short circuits in electrical equipment wiring, the explosion-proof nature of equipment, and improper operation of electrical equipment. The causes of electrostatic sparks include: static electricity from friction of high-resistance appliances; The causes of impact friction open flame include: rock-metal impact open flame, rock-to-metal impact open flame, metal-to-metal impact open flame, and belt friction open flame. The causes of spontaneous combustion of coal include: spontaneous combustion due to oxidation of the coal wall and spontaneous combustion of floating coal in the goaf.
[0008] In some embodiments, the constituent factors of the gas explosion triangle in S200 specifically include: gas concentration, ignition source temperature, and oxygen concentration; The specific sources of coal mine gas explosion hazards are: causative factors + gas concentration, or causative factors + ignition source temperature; or causative factors + oxygen concentration.
[0009] In some embodiments, in S300, A single-cause hazard source for coal mine gas is defined as follows: if a single causative factor acts only on a single constituent element of a gas explosion triangle, causing a change in its state, then the coal mine gas explosion hazard source composed of that causative factor and the constituent element of the gas explosion triangle is called a single-cause hazard source. A coal mine gas explosion hazard source with multiple causes is defined as follows: multiple causative factors act on the same constituent factor of a gas explosion triangle, causing its state to change and leading to the emergence of a hazard source.
[0010] In some embodiments, when the coal mine gas explosion hazard source is caused by a single factor and the same gas explosion triangle constituent factors When forming a gas explosion triangle, the constituent elements are... The state function mapping relationship at time t+1 is: ; In the formula, and The data represent the state of the constituent elements of the gas explosion triangle at time t and time t+1. To determine the effect function of causative factors on the constituent factors of the gas explosion triangle, regression analysis was used to perform regression calculations on the state data of causative factors and the state data of the constituent factors of the gas explosion triangle in order to determine the specific function expression. The state data of the causative factors at time t; When the aforementioned coal mine gas explosion hazard source is caused by multiple factors leading to coal mine gas explosions and the same gas explosion triangle constituent factors When a gas explosion triangle is formed, its constituent factors are determined by multiple causative factors. The state at time t+1 is: ; In the formula These are contributing factors to coal mine gas explosions. The constituent elements of a gas explosion triangle; α i ( t ) as causative factors a i State data at time t i = 1, 2, ..., m; A( t A( represents the combined state of all causative factors) t )= ; G ( α i ( t ); β n ( t )) is a causative factor a i Factors constituting the gas explosion triangle The action function can be determined by using regression analysis to perform regression calculations on the state data of the causative factors and the state data of the constituent factors of the gas explosion triangle, in order to determine the specific function expression.
[0011] In some embodiments, the discrimination criterion 1 for a single-cause hazard source in S500 is specifically as follows: set up The causative factors of coal mine gas explosions, The state of the causal factors, Causes of coal mine gas explosions The set of states, The constituent elements of a gas explosion triangle The state of the constituent elements of the gas explosion triangle. Causes of coal mine gas explosions The state of The range of state changes, where P is the value at which a gas explosion occurs. The range of values that the state can take; Let G be the effect function of the causative factors on the constituent factors of the gas explosion triangle, ( a b ；G If the combination of the three elements satisfies , , ,So( a b ；G It has potential dangers.
[0012] In some embodiments, in S500: The specific criteria for identifying multi-source hazard sources are as follows: set up These factors were contributing to multiple coal mine gas explosions. The state of the causal factors, The constituent elements of a gas explosion triangle The state of the constituent elements of the gas explosion triangle. Causes of coal mine gas explosions The state of The range of state changes, where P is the value at which a gas explosion occurs. The range of values that the state can take; Let G be the effect function of the causative factors on the constituent factors of the gas explosion triangle. If the combination of the three elements satisfies ,So It has potential dangers.
[0013] In some embodiments, step S600 includes: S601: Perform a traversal search operation to filter out all causal factors related to gas explosion accidents in the coal mine production system and the corresponding gas explosion triangle constituent factors. S602: Based on the logical relationship between the causative factors and the constituent factors of the gas explosion triangle, determine whether the type of the hazard source to be identified is a single-cause hazard source or a multi-cause hazard source. S603: Substitute the state of the causative factors and the state of the constituent factors of the gas explosion triangle into the corresponding discrimination criteria for verification. S604: If the combination meets the judgment conditions of the corresponding discrimination criteria, then the combination of the causative factor and the constituent factors of the gas explosion triangle is identified as a coal mine gas explosion hazard source.
[0014] In some embodiments, the traversal retrieval operation performed in S601 is specifically as follows: based on the factor relationship diagram, a top-down reverse traversal method is adopted, starting from the accident result layer, sequentially traversing the explosion core element layer and the causal transmission intermediate layer, and finally completing the full node traversal retrieval of the causal factor layer, without omission filtering out all causal factors related to the gas explosion accident and the corresponding gas explosion triangle constituent factors.
[0015] Compared with the prior art, the present invention has the following beneficial effects: Compared to traditional hazard identification methods for coal mine gas explosions, this invention no longer uses individual elements such as people, machines, environment, and pipes as hazard sources. Instead, it uses the combination of causative factors and constituent elements of the gas explosion triangle as the hazard source, thus directly characterizing the causative source and its target. More importantly, the hazard source directly reflects the controlled object—the causative factor. After identifying the hazard source, control measures can be directly taken against the controlled object. This definition method is highly beneficial for safety management. It can effectively provide scientific and comprehensive technical support for the prevention and control of coal mine gas explosions and has significant application value compared to existing technologies. Attached Figure Description
[0016] Figure 1 This is a flowchart of the present invention; Figure 2 This is a factor relationship diagram. Detailed Implementation
[0017] To make the objectives, technical solutions, and advantages of the embodiments of the present invention clearer, the technical solutions in the embodiments of the present invention will be clearly and completely described below. Obviously, the described embodiments are some embodiments of the present invention, but not all embodiments. Based on the embodiments of the present invention, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of the present invention.
[0018] like Figure 1 As shown, a method for identifying different types of hazard sources in coal mine gas explosion accidents includes: S100: Based on the factor relationship diagram of gas explosion accidents in the coal mine production system, extract the causative factors that lead to gas accidents; S200: Constructing a coal mine gas explosion hazard source composed of causative factors and gas explosion triangle components; S300: Defines different types of hazards for coal mine gas explosions, including single-cause hazards and multi-cause hazards. S400: Based on statistical data of various parameters in the coal mine production process, establish a functional mapping relationship between the causative factors and the state of the constituent factors of the gas explosion triangle in the coal mine gas explosion hazard source; S500: Establish criteria for identifying coal mine gas explosion hazards corresponding to the single-cause hazard source and the multi-cause hazard source, respectively; S600: Perform the identification operation of coal mine gas explosion hazard sources in accordance with the aforementioned discrimination criteria.
[0019] In specific embodiments, such as Figure 2As shown in S100, the factor relationship diagram includes: the first level is the accident result layer, with the target node being a gas explosion. The triggering state of this node is jointly determined by the states of the three core components of the gas explosion triangle at the next level; the second level is the explosion core element layer, including three primary nodes directly related to the gas explosion: gas concentration, oxygen concentration, and ignition source temperature. Their states directly determine the triggering state of the gas explosion node, and their own states are driven by the states of the secondary nodes at the next level; the third level is the causal transmission intermediate layer, used to connect the secondary nodes of the underlying causal factors and the primary core elements, wherein the secondary node for gas concentration includes the... The working face includes the amount of gas extracted during mining, the absolute gas emission from the working face, and the amount of gas discharged from the working face ventilation system; oxygen concentration directly corresponds to the causative factors, including the air volume in the return airway and the air volume in the intake airway; the secondary nodes of ignition source temperature include blasting, electric sparks and arcs, electrostatic sparks, impact friction open flames, and coal spontaneous combustion open flames; the fourth level is the causative factor layer, which sets the causative factors that directly drive the changes in the state of the secondary nodes; among them, the causative factors of the extraction amount during mining in this working face include: extraction time, extraction negative pressure, and extraction parameters in the top extraction roadway; the absolute gas emission from the working face includes the absolute gas emission from this coal seam and the absolute gas emission from adjacent seams; the causative factors of the absolute gas emission from this coal seam are further subdivided as follows: The original gas content and adsorbed gas content of this coal seam; the causal factors of the adsorbed gas content of this coal seam are further subdivided into: the pre-mining gas extraction rate of this coal seam, the gas emission coefficient of the surrounding rock of this working face, the mining intensity of this coal seam working face, and the mining rate of this coal seam working face; the causal factors of the pre-mining gas extraction rate of this coal seam are further subdivided into: extraction time, extraction negative pressure, top extraction roadway extraction parameters, protective layer mining pressure relief effect, and the permeability coefficient of this coal seam; the causal factors of the mining intensity of this coal seam working face are further subdivided into: working face length and mining height; the causal factors of the mining rate of this coal seam working face are further subdivided into: mining height; the causal factors of the absolute gas emission of adjacent layers include: working face length and mining height; The contributing factors to the amount of methane discharged from the working face include: methane concentration in the intake airway, methane concentration in the return airway, air volume in the return airway, and air volume in the intake airway; the contributing factors to blasting include: the quality of the blast hole sealing, the minimum resistance line, the quality of the detonating equipment, and the blast hole depth; the contributing factors to electric sparks and arcs include: short circuits in electrical equipment wiring, the explosion-proof performance of equipment, and improper operation of electrical equipment; the contributing factors to electrostatic sparks include: static electricity from friction of high-resistance appliances; the contributing factors to impact and friction open flames include: rock-metal impact open flames, rock-to-metal impact open flames, metal-to-metal impact open flames, and belt friction open flames; the contributing factors to spontaneous combustion of coal include: spontaneous combustion of coal wall oxidation and spontaneous combustion of floating coal in the goaf.
[0020] The specific causative factors of coal mine gas explosions in this embodiment are illustrated below: Excessive gas concentration due to insufficient ventilation is caused by air volume; excessive gas concentration due to insufficient gas extraction is caused by gas extraction volume; gas explosion caused by open flame due to friction of underground conveyor belts is caused by open flame due to conveyor belt friction; gas explosion caused by spontaneous combustion of coal is caused by open flame due to spontaneous combustion of coal, etc.
[0021] In a specific embodiment, in step S200, a coal mine gas explosion hazard source is constructed, consisting of the causative factor and the constituent elements of the gas explosion triangle. The constituent elements of the gas explosion triangle specifically include: gas concentration, ignition source temperature, and oxygen concentration. The coal mine gas explosion hazard source is specifically: causative factor + gas concentration, or causative factor + ignition source temperature; or causative factor + oxygen concentration.
[0022] Examples of specific hazards related to coal mine gas explosions are as follows: (Air volume; gas concentration) constitutes one hazard source, (gas extraction volume; gas concentration) constitutes one hazard source, (blasting; coal face fire temperature) constitutes one hazard source, and so on.
[0023] In a specific embodiment, S300: Define the different types of hazards of coal mine gas explosion, including the definition of single-cause hazards and multi-cause hazards.
[0024] See Figure 1 As shown in this embodiment, the specific definitions of different types of hazard sources for coal mine gas explosions are as follows: A single-cause coal mine gas hazard source is defined as a coal mine gas explosion hazard source formed by a single causative factor acting only on a single component of a gas explosion triangle, causing a change in its state.
[0025] Multi-source causative hazard source of coal mine gas: When multiple causative factors act on the same constituent factor of the gas explosion triangle, causing its state to change and leading to the emergence of a hazard source, the coal mine gas explosion hazard source is called a multi-source causative hazard source.
[0026] In a specific embodiment, in S400: based on statistical data of parameters such as air volume, gas extraction volume, mining height, and gas concentration during coal mine production, a functional mapping relationship is established between the causative factors in the coal mine gas explosion hazard source and the state of the constituent factors of the gas explosion triangle.
[0027] See Figure 1 As shown, in this embodiment, the specific functional mapping relationship between the causative factors and the constituent factors of the gas explosion triangle in the coal mine gas explosion hazard source is as follows: set up The causative factors of coal mine gas explosions, and The state data of the causal factors at time t and time t+1, The constituent elements of a gas explosion triangle and Let the state data of the constituent elements of the gas explosion triangle at time t and time t+1 be given. To determine the effect function of causative factors on the constituent factors of the gas explosion triangle, regression analysis was used to perform regression calculations on the state data of causative factors and the state data of the constituent factors of the gas explosion triangle to determine the specific function expression. This is especially relevant when the coal mine gas explosion hazard source is caused by a single causative factor. and the same gas explosion triangle constituent factors When formed, it constitutes a single, uncomplicated hazard source, and the constituent elements of the gas explosion triangle are... The state at time t+1 is shown in formula (1).
[0028] (1) When the aforementioned coal mine gas explosion hazard source is caused by multiple factors leading to coal mine gas explosions and the same gas explosion triangle constituent factors When a gas explosion triangle is formed, it is considered a multi-source hazard source. The constituent factors of the gas explosion triangle are determined by multiple contributing factors. The state at time t+1 is shown in formula (2).
[0029] (2) In the formula These are contributing factors to coal mine gas explosions. The constituent elements of a gas explosion triangle; α i ( t ) as causative factors a i State data at time t i = 1, 2, ..., m; A( t A( represents the combined state of all causative factors) t )= ; G ( α i ( t ); β n ( t )) is a causative factor a i Factors constituting the gas explosion triangle The action function can be determined by using regression analysis to perform regression calculations on the state data of the causative factors and the state data of the constituent factors of the gas explosion triangle, in order to determine the specific function expression.
[0030] In a specific embodiment, S500: Establish criteria for identifying coal mine gas explosion hazard sources.
[0031] The specific criteria for identifying coal mine gas explosion hazards in this embodiment are as follows: Judgment Criterion 1: Let The causative factors of coal mine gas explosions, The state of the causal factors, Causes of coal mine gas explosions The set of states, The constituent elements of a gas explosion triangle The state of the constituent elements of the gas explosion triangle. Causes of coal mine gas explosions The state of The range of state changes, where P is the value at which a gas explosion occurs. The range of values for the state. Let... The effect function of causative factors on the constituent factors of the gas explosion triangle. a b; G If the combination of the three elements satisfies , , ,So( a b ；G It is a potential hazard and a single cause of coal mine gas explosion.
[0032] Judgment Criterion 2: Let These factors were contributing to multiple coal mine gas explosions. The state of the causal factors, The constituent elements of a gas explosion triangle The state of the constituent elements of the gas explosion triangle. The causative factors of coal mine gas explosions The range of state changes, where P is the value at which a gas explosion occurs. The range of values for the state. Let G be the effect function of the causative factors on the constituent factors of the gas explosion triangle. If the combination of the three elements satisfies , .So It poses a potential hazard and is a multi-source cause of coal mine gas explosions.
[0033] In a specific embodiment, S600 includes: S601: Perform a traversal search operation to filter out all causative factors related to gas explosion accidents in the coal mine production system and the corresponding gas explosion triangle constituent factors; S602: Based on the logical relationship between the causative factors and the gas explosion triangle constituent factors, determine whether the type of the hazard source to be identified is a single-source hazard source or a multi-source causative hazard source; S603: Substitute the state of the causative factor and the state of the gas explosion triangle constituent factors into the corresponding type's discrimination criteria for verification; S604: If the combination meets the judgment conditions of the corresponding discrimination criteria, then the combination of the causative factor and the gas explosion triangle constituent factors is identified as a coal mine gas explosion hazard source.
[0034] In S601, a traversal retrieval operation is performed. Specifically, based on the factor relationship diagram, a top-down reverse traversal method is adopted. Starting from the accident result layer, the explosion core element layer and the causal transmission intermediate layer are traversed in sequence. Finally, the full node traversal retrieval of the causal factor layer is completed, and all causal factors related to the gas explosion accident and the corresponding gas explosion triangle constituent factors are screened out without omission.
[0035] This embodiment takes the production activities of a coal mining face in an underground coal mine as an example. Based on the proposed definition of coal mine gas explosion hazard sources, it analyzes examples of single-cause coal mine gas hazard sources and multi-cause coal mine gas hazard sources.
[0036] (1) Coal mine gas single cause hazard source If the analysis reveals that the causative factor of a coal mine gas explosion—the change in the frictional static electricity of high-resistance appliances—leads to a change in the constituent factor of the gas explosion triangle—the electrostatic spark—then a logical relationship is formed: Based on the state data of the causative factors of coal mine gas explosion, the state of the constituent factors of the gas explosion triangle is obtained from equation (1). Then, the state of the constituent factors of the gas explosion triangle - electrostatic spark at time t+1 is: Substituting the state of the causative factor and the state of the constituent factors of the gas explosion triangle into the discrimination criterion 1, when the influence of the state of the causative factor on the state of the constituent factors of the gas explosion triangle is within the range of values when a gas explosion occurs, it can be seen that (the static electricity of high-resistance appliances; static sparks) has potential danger and is a single causative hazard source of coal mine gas, thus completing the identification of a single causative hazard source.
[0037] (2) Multiple sources of gas hazards in coal mines If the analysis reveals that changes in the causative factors of coal mine gas explosions—such as the pre-mining gas extraction rate of the coal seam, the gas emission coefficient of the surrounding rock of the working face, the mining intensity of the working face, and the mining rate of the working face—lead to changes in the constituent factors of the gas explosion triangle—such as the adsorbed gas content of the coal seam—then a logical relationship is formed: Based on the state data of the causative factors of coal mine gas explosion, the state of the constituent factors of the gas explosion triangle is obtained from equation (2). Then, the state of the constituent factors of the gas explosion triangle at time t+1 - the adsorbed gas content of this coal seam is: Substituting the state of the causative factors and the state of the constituent factors of the gas explosion triangle into the discrimination criterion 2, when the influence of the state of the causative factors on the state of the constituent factors of the gas explosion triangle is within the range of values when a gas explosion occurs, it can be known that (the gas extraction rate before mining of this coal seam, the gas emission coefficient of the surrounding rock of this working face, the mining intensity of this coal seam working face, the mining rate of this coal seam working face, and the adsorbed gas content of this coal seam) has potential danger and is a multi-source causative hazard source of coal mine gas, thus completing the multi-source causative hazard source identification.
[0038] Existing methods for identifying hazard sources in coal mine gas explosions typically classify and identify them based on independent elements. These methods fail to adequately consider the interrelationships between these elements, thus limiting their effectiveness in tracing the causes of accidents and impacting identification efficiency. In contrast, the method for defining and identifying different types of hazard sources in coal mine gas explosions provided by this invention no longer uses individual elements such as people, machines, environment, and pipes as hazard sources. Instead, it uses the combination of causative factors of the gas explosion and the constituent elements of the gas explosion triangle as the hazard source. This directly characterizes the causative source and its target. More importantly, the hazard source directly reflects the controlled object—the causative factor. After identifying the hazard source, control measures can be directly implemented on the controlled object. This definition method is highly beneficial for safety management. It can effectively provide scientific and comprehensive technical support for the prevention and control of coal mine gas explosions and has significant application value compared to existing technologies.
[0039] Finally, it should be noted that the above embodiments are only used to illustrate the technical solutions of the present invention, and not to limit them; although the present invention has been described in detail with reference to the foregoing embodiments, those skilled in the art should understand that modifications can still be made to the technical solutions described in the foregoing embodiments, or equivalent substitutions can be made to some or all of the technical features; and these modifications or substitutions do not cause the essence of the corresponding technical solutions to deviate from the scope of the technical solutions of the embodiments of the present invention.
Claims
1. A method for identifying different types of hazard sources in coal mine gas explosion accidents, characterized in that, include: S100: Based on the factor relationship diagram of gas explosion accidents in the coal mine production system, extract the causative factors that lead to gas accidents; S200: Constructing a coal mine gas explosion hazard source composed of causative factors and gas explosion triangle components; S300: Defines different types of hazards for coal mine gas explosions, including single-cause hazards and multi-cause hazards. S400: Using statistical data on the state of the causative factors and the constituent factors of the gas explosion triangle in the coal mine production process, a functional mapping relationship is established between the state of the causative factors and the constituent factors of the gas explosion triangle in the coal mine gas explosion hazard source. S500: Establish criteria for identifying coal mine gas explosion hazards corresponding to the single-cause hazard source and the multi-cause hazard source, respectively; S600: Perform the identification operation of coal mine gas explosion hazard sources in accordance with the aforementioned discrimination criteria.
2. The method for identifying different types of hazard sources in coal mine gas explosion accidents according to claim 1, characterized in that, In step S100, the factor relationship diagram includes: The first level is the accident result level, with the target node being a gas explosion. The triggering state of this node is determined by the states of the three core components of the gas explosion triangle at the next level. The second level is the core element layer of the explosion, which includes three primary nodes directly related to the gas explosion: gas concentration, oxygen concentration, and ignition source temperature. Their states directly determine the triggering state of the gas explosion node, and their own states are driven by the states of the next level and secondary nodes. The third level is the intermediate layer of cause-effect transmission, which is used to connect the secondary nodes of the underlying causal factors and the primary core elements. The secondary nodes of gas concentration include the extraction volume during mining in this working face, the absolute gas emission volume of the working face, and the gas volume of ventilation in the working face. Oxygen concentration directly corresponds to causative factors, including return airway volume and intake airway volume; The secondary nodes of ignition source temperature include artillery fire, electric sparks and arcs, electrostatic sparks, impact friction open flames, and coal spontaneous combustion open flames; The fourth level is the causal factor layer, which sets the causal factors that directly drive the state changes of the second-level nodes; Among them, the factors that cause the extraction volume in this working face include: extraction time, extraction negative pressure and extraction parameters of the top extraction roadway; The absolute gas emission at the working face includes the absolute gas emission of this coal seam and the absolute gas emission of adjacent seams; The causal factors of the absolute gas emission of this coal seam are subdivided into: the original gas content of this coal seam and the adsorbed gas content of this coal seam. The contributing factors to the adsorbed gas content in this coal seam are further subdivided into: the pre-mining gas extraction rate of this coal seam, the gas emission coefficient of the surrounding rock of this working face, the mining intensity of this coal seam working face, and the mining recovery rate of this coal seam working face; the contributing factors to the pre-mining gas extraction rate of this coal seam are further subdivided into: extraction time, extraction negative pressure, top extraction roadway extraction parameters, pressure relief effect of protective layer mining, and the permeability coefficient of this coal seam; the contributing factors to the mining intensity of this coal seam working face are further subdivided into: working face length and mining height; the contributing factors to the mining recovery rate of this coal seam working face are further subdivided into: mining height; The contributing factors to the absolute gas emission of adjacent layers include: working face length and mining height; The contributing factors to the amount of methane discharged from the working face include: methane concentration in the intake airway, methane concentration in the return airway, air volume in the return airway, and air volume in the intake airway. The causative factors of artillery fire include: the quality of the borehole sealing, the minimum resistance line, the quality of the detonating equipment, and the depth of the borehole; The causes of electric sparks and arcs include: short circuits in electrical equipment wiring, the explosion-proof nature of equipment, and improper operation of electrical equipment. The causes of electrostatic sparks include: static electricity from friction of high-resistance appliances; The causes of impact friction open flame include: rock-metal impact open flame, rock-to-metal impact open flame, metal-to-metal impact open flame, and belt friction open flame. The causes of spontaneous combustion of coal include: spontaneous combustion due to oxidation of the coal wall and spontaneous combustion of floating coal in the goaf.
3. The method for identifying different types of hazard sources in coal mine gas explosion accidents according to claim 1, characterized in that, In S200, the constituent factors of the gas explosion triangle specifically include: gas concentration, ignition source temperature, and oxygen concentration; The specific sources of coal mine gas explosion hazards are: causative factors + gas concentration, or causative factors + ignition source temperature; or causative factors + oxygen concentration.
4. The method for identifying different types of hazard sources in coal mine gas explosion accidents according to claim 1, characterized in that, In S300, A single-cause hazard source for coal mine gas is defined as follows: if a single causative factor acts only on a single constituent element of a gas explosion triangle, causing a change in its state, then the coal mine gas explosion hazard source composed of that causative factor and the constituent element of the gas explosion triangle is called a single-cause hazard source. A coal mine gas explosion hazard source with multiple causes is defined as follows: multiple causative factors act on the same constituent factor of a gas explosion triangle, causing its state to change and leading to the emergence of a hazard source.
5. The method for identifying different types of hazard sources in coal mine gas explosion accidents according to claim 1, characterized in that, In S400: When the coal mine gas explosion hazard source is caused by a single factor and the same gas explosion triangle constituent factors When forming a gas explosion triangle, the constituent elements are... The state function mapping relationship at time t+1 is: ； In the formula, and The data represent the state of the constituent elements of the gas explosion triangle at time t and time t+1. To determine the effect function of causative factors on the constituent factors of the gas explosion triangle, regression analysis was used to perform regression calculations on the state data of causative factors and the state data of the constituent factors of the gas explosion triangle in order to determine the specific function expression. The state data of the causative factors at time t; When the aforementioned coal mine gas explosion hazard source is caused by multiple factors leading to coal mine gas explosions and the same gas explosion triangle constituent factors When a gas explosion triangle is formed, its constituent factors are determined by multiple causative factors. The state at time t+1 is: ； In the formula These are contributing factors to coal mine gas explosions. The constituent elements of a gas explosion triangle; α i ( t ) as causative factors a i State data at time t i = 1, 2, ..., m; A( t A( represents the combined state of all causative factors) t )= ; G ( α i ( t ); β n ( t )) is a causative factor a i Factors constituting the gas explosion triangle The action function can be determined by using regression analysis to perform regression calculations on the state data of the causative factors and the state data of the constituent factors of the gas explosion triangle, in order to determine the specific function expression.
6. The method for identifying different types of hazard sources in coal mine gas explosion accidents according to claim 1, characterized in that, In S500: The specific criteria for identifying a single-cause hazard are as follows: set up The causative factors of coal mine gas explosions, The state of the causal factors, Causes of coal mine gas explosions The set of states, The constituent elements of a gas explosion triangle The state of the constituent elements of the gas explosion triangle. Causes of coal mine gas explosions The state of The range of state changes, where P is the value at which a gas explosion occurs. The range of values that the state can take; Let G be the effect function of the causative factors on the constituent factors of the gas explosion triangle, ( a b; G If the combination of the three elements satisfies , , ,So( a b; G It has potential dangers.
7. The method for identifying different types of hazard sources in coal mine gas explosion accidents according to claim 1, characterized in that, In S500: The specific criteria for identifying multi-source hazard sources are as follows: set up These factors were contributing to multiple coal mine gas explosions. The state of the causal factors, The constituent elements of a gas explosion triangle The state of the constituent elements of the gas explosion triangle. The causative factors of coal mine gas explosions The range of state changes, where P is the value at which a gas explosion occurs. The range of values that the state can take; Let G be the effect function of the causative factors on the constituent factors of the gas explosion triangle. If the combination of the three elements satisfies ,So It has potential dangers.
8. The definition and identification method for different types of hazard sources in coal mine gas explosion accidents according to any one of claims 1-7, characterized in that, The S600 includes: S601: Perform a traversal search operation to filter out all causal factors related to gas explosion accidents in the coal mine production system and the corresponding gas explosion triangle constituent factors. S602: Based on the logical relationship between the causative factors and the constituent factors of the gas explosion triangle, determine whether the type of the hazard source to be identified is a single-cause hazard source or a multi-cause hazard source. S603: Substitute the state of the causative factors and the state of the constituent factors of the gas explosion triangle into the corresponding discrimination criteria for verification. S604: If the combination meets the judgment conditions of the corresponding discrimination criteria, then the combination of the causative factor and the constituent factors of the gas explosion triangle is identified as a coal mine gas explosion hazard source.
9. The method for identifying different types of hazard sources in coal mine gas explosion accidents according to claim 8, characterized in that, The traversal retrieval operation performed in S601 is as follows: based on the factor relationship diagram described in claim 2, a top-down reverse traversal method is adopted, starting from the accident result layer, sequentially traversing the explosion core element layer and the causal transmission intermediate layer, and finally completing the full node traversal retrieval of the causal factor layer, without omission, screening out all causal factors related to the gas explosion accident and the corresponding gas explosion triangle constituent factors.