Gas explosion risk early warning method and system

Abstract

The invention relates to a gas explosion risk early warning method and system, and belongs to the field of coal mine safety. According to the method, gas over-limit risk early-warning characteristic indexes and fire risk early-warning characteristic indexes of early-warning sites are collected and processed to obtain corresponding risk levels, and then according to different combinations of site characteristics and time characteristics of the gas over-limit risk levels and the fire safety risk levels, the gas over-limit risk levels and the fire safety risk levels are obtained. Determining a corresponding rule for performing comprehensive risk evaluation according to the gas overrun risk level and the fire safety risk level, and determining a gas explosion early warning result according to the corresponding rule; and controlling corresponding linkage equipment to perform early warning response according to the determined gas explosion early warning result. The system is used for executing the method. According to the method, gas overrun and fire risks are considered, gas explosion is early warned according to the relation between the gas overrun risk and fire source time-space intersection, and the accuracy of a gas explosion early warning result is ensured.

Description

Technical Field

[0001] The invention belongs to the field of coal mine safety and relates to a gas explosion risk early warning method and system. Background Art

[0002] As the depth of coal mining in my country gradually increases, the gas content and gas pressure in coal mines gradually increase, and the risk of abnormal gas outburst and gas explosion also increases. With the advancement and deepening of information-based mine construction in my country, the automatic collection and integration of data provide technical means and possibilities for intelligent early warning of gas explosions. For my country's underground coal mines, high-gas mines, low-gas mines and protruding mines are all facing the risk of gas explosions. It is worth noting that the risk of gas explosions faced by low-gas mines is often ignored, and gas disaster management is easily neglected. Therefore, low-gas mines also have the risk of gas explosion accidents, and even particularly serious gas explosion accidents. The conditions for gas explosion are gas concentration of 5% to 16%, oxygen concentration of not less than 12%, fire source energy of not less than 650℃, and gas explosion accidents will only occur when the three conditions of gas concentration, oxygen concentration and fire source are met at the same time. Due to the large number of personnel working underground, the oxygen concentration required for gas explosion in the underground environment is always met. Therefore, in order to avoid gas explosions, only the two conditions of gas concentration and fire source can be controlled. Gas explosion occurs when the gas concentration and fire source exist in the same space at the same time. Therefore, based on this condition, an early warning of gas explosion is issued based on the relationship between gas exceeding the limit and the time and space intersection of the fire source. Summary of the invention

[0003] In view of this, an object of the present invention is to provide a gas explosion risk early warning method and system.

[0004] In order to achieve the above object, the present invention provides the following technical solutions:

[0005] A gas explosion risk early warning method, the method comprising the following steps:

[0006] S1. Collect gas over-limit risk warning characteristic indicators and fire risk warning characteristic indicators at the warning locations respectively, and form a gas over-limit risk indicator matrix X and a fire risk indicator matrix Y respectively;

[0007] S2, establishing a safe state matrix A1 and a dangerous state matrix W1 of gas over-limit risk characteristic index values, as well as a safe state matrix A2 and a dangerous state matrix W2 of fire risk index values;

[0008] S3, respectively calculating the distances J1 and J2 between the gas over-limit risk characteristic index value and the safe state matrix and the dangerous state matrix, and the distances G1 and G2 between the fire risk index value and the safe state matrix and the dangerous state matrix;

[0009] S4. Calculate the gas over-limit risk status evaluation score s and the fire safety risk status evaluation score e according to the corresponding distance parameters, and obtain the corresponding risk level;

[0010] S5. According to different combinations of location characteristics and time characteristics of gas over-limit risk level and fire safety risk level, determine corresponding rules for comprehensive risk assessment based on gas over-limit risk level and fire safety risk level, and determine gas explosion warning results based on the corresponding rules;

[0011] S6. Control the corresponding linkage equipment to respond to the warning according to the determined gas explosion warning result.

[0012] Further, in step S1, the gas over-limit risk index matrix x is expressed as:

[0013] X = [x1, x2, x3…x n ]

[0014] Among them, x1, x2, …x n They are respectively gas over-limit characteristic index values, which at least include: gas outburst volume, gas concentration, air volume, extraction pure volume, coal seam thickness, coal seam inclination, and daily advance index;

[0015] The fire risk index matrix Y is expressed as:

[0016] Y=[y1,y2,y3…y n ]

[0017] Among them, y1, y2…y n They are fire risk characteristic index values ​​respectively, and the fire risk characteristic index values ​​at least include: carbon monoxide, carbon-oxygen ratio, temperature, and carbon dioxide index.

[0018] Further, in step S2, the safe state matrix A1 and the dangerous state matrix W1 of each characteristic index value of gas over-limit risk are respectively expressed as:

[0019] A1=[x 11 ,x 21 , x 31 …x n1 ]

[0020] W1=[x 12 , x 22 , x 32 …x n2 ]

[0021] Where: x 11 、x 21 、x 31 …x n1 are the lowest values ​​that can be obtained under the safe state of each characteristic index, x12 、x 22 、x 32 …x n2 are the critical values ​​of each characteristic indicator reaching a serious dangerous state;

[0022] The safety state matrix A2 and the dangerous state matrix W2 of each characteristic index value of fire risk are expressed as:

[0023] A2=[y 11 ,y 21 ,y 31 …y n1 ]

[0024] W2=[y 12 ,y 22 ,y 32 …y n2 ]

[0025] Where: y 11 ,y 21 ,y 31 …y n1 are the lowest values ​​that can be obtained under the safe state of each characteristic index, y 12 ,y 22 ,y 32 …y n2 are the critical values ​​of each characteristic indicator reaching a serious dangerous state.

[0026] Further, in step S3, the gas over-limit characteristic index value x i The distance from each element x in the safe state matrix A1 i1 The distance J1 between them and the distance x from each element in the dangerous state matrix W1 i2 The distance J2 between them is expressed as:

[0027]

[0028]

[0029] Fire risk characteristic index value y i The distance from each element y in the safe state matrix A2 i1 The distance G1 between them and the distance y from each element in the dangerous state matrix W2 i2 The distance G2 between them is expressed as:

[0030]

[0031]

[0032] The above distance values ​​are used to measure the positions of the gas over-limit characteristic index values ​​and the fire risk characteristic index values ​​in the multidimensional space.

[0033] Further, in step S4, the gas over-limit risk status evaluation score s of the warning location is calculated according to J1 and J2:

[0034]

[0035] Compare the evaluation scores s and s0. If s>s0, it is judged as low risk; if s1<s≤s0, it is judged as medium risk; if s≤s1, it is judged as high risk, where s0 and s1 are the critical values ​​of low risk, medium risk and high risk;

[0036] Calculate the fire safety risk status evaluation score e of the warning location based on G1 and G2:

[0037]

[0038] Compare the evaluation scores e with e0. If e>e0, it is judged as low risk; if e1<e≤e0, it is judged as medium risk; if e≤e1, it is judged as high risk, where e0 and e1 are the critical values ​​of low risk, medium risk and high risk.

[0039] Further, in step S5, the gas explosion warning result is obtained based on the different spatial and temporal intersections of gas risk and fire risk, and the gas over-limit risk level and fire risk level, wherein the different spatial and temporal intersections of gas risk and fire risk include at least the following combinations:

[0040] (1) The gas over-limit risk and fire risk warning results occur at the same location and during the same period;

[0041] (2) The gas over-limit risk and fire risk warning results occurred at the same location but not at the same time;

[0042] (3) The gas over-limit risk and fire risk warning results occurred in different locations but in the same period;

[0043] (4) The gas over-limit risk and fire risk warning results occurred in different locations and at different times.

[0044] Furthermore, different comprehensive evaluation rules are set for different time-space cross combinations, among which,

[0045] (1) When the gas over-limit risk and fire risk warning results occur at the same location and during the same period, the comprehensive evaluation rules are as follows:

[0046] If the risk of gas exceeding the limit is low, then the risk of gas explosion is low when the fire risk is low, the risk of gas explosion is medium when the fire risk is medium, and the risk of gas explosion is high when the fire risk is high;

[0047] If the gas over-limit risk is medium, then the gas explosion risk is medium when the fire risk is low, the gas explosion risk is high when the fire risk is medium, and the gas explosion risk is high when the fire risk is high;

[0048] If the gas over-limit risk is high, then the gas explosion risk is high when the fire risk is low, the gas explosion risk is high when the fire risk is medium, and the gas explosion risk is high when the fire risk is high;

[0049] (2) If the gas over-limit risk and fire risk warning results occur at the same location but not at the same time, the comprehensive evaluation rules are as follows:

[0050] If the risk of gas exceeding the limit is low, then the risk of gas explosion is low when the fire risk is low, the risk of gas explosion is low when the fire risk is medium, and the risk of gas explosion is medium when the fire risk is high;

[0051] If the gas over-limit risk is medium, then the gas explosion risk is low when the fire risk is low, the gas explosion risk is medium when the fire risk is medium, and the gas explosion risk is high when the fire risk is high;

[0052] If the gas over-limit risk is high, the gas explosion risk is medium when the fire risk is low, the gas explosion risk is high when the fire risk is medium, and the gas explosion risk is high when the fire risk is high;

[0053] (3) For gas over-limit risk and fire risk warning results occurring in different locations but in the same period, the comprehensive evaluation rules are as follows:

[0054] If the risk of gas exceeding the limit is low, then the risk of gas explosion is low when the fire risk is low, the risk of gas explosion is low when the fire risk is medium, and the risk of gas explosion is medium when the fire risk is high;

[0055] If the risk of gas exceeding the limit is medium, then the risk of gas explosion is low when the fire risk is low, the risk of gas explosion is medium when the fire risk is medium, and the risk of gas explosion is medium when the fire risk is high;

[0056] If the gas over-limit risk is high, the gas explosion risk is medium when the fire risk is low, the gas explosion risk is high when the fire risk is medium, and the gas explosion risk is high when the fire risk is high;

[0057] (4) For gas over-limit risk and fire risk warning results occurring at different locations and at different times, the comprehensive evaluation rules are as follows:

[0058] If the risk of gas exceeding the limit is low, then the risk of gas explosion is low when the fire risk is low, the risk of gas explosion is low when the fire risk is medium, and the risk of gas explosion is low when the fire risk is high;

[0059] If the risk of gas exceeding the limit is medium, then the risk of gas explosion is low when the fire risk is low, the risk of gas explosion is low when the fire risk is medium, and the risk of gas explosion is medium when the fire risk is high;

[0060] If the risk of gas exceeding the limit is high, then the risk of gas explosion is low when the fire risk is low; the risk of gas explosion is medium when the fire risk is medium; and the risk of gas explosion is high when the fire risk is high.

[0061] Further, in step S6, when the gas over-limit risk and gas explosion risk warning results are both at medium risk or above, the local ventilator or damper is adjusted to increase the air volume at the warning location. The calculation method for increasing the air volume f at the warning location is:

[0062]

[0063] In the formula: C is the gas concentration value of the working face or the predicted value of the gas concentration, C0 is the critical value of the gas concentration alarm, f0 is the current air supply volume of the working face, and f is the air volume of the working face after adjustment;

[0064] If adjusting the ventilation equipment cannot reduce the risk of gas exceeding the limit at the warning location, the production equipment should be regulated to reduce the coal cutting speed and daily output. The calculation method for reducing the coal cutting speed Δg is:

[0065] Δg=(Q-Q0) / k1

[0066] Where: Q is the current gas emission of the working face or the predicted value of gas emission, Q0 is the critical value of gas emission alarm, k1 is the influence coefficient of tunneling speed, and Δg is the reduction in coal cutting speed.

[0067] The present invention also proposes a gas explosion risk warning system, which is used to execute the above-mentioned gas explosion risk warning method, and includes: a data acquisition module, a gas over-limit warning module, a fire risk warning module, a gas explosion warning module, a gas explosion risk emergency rescue module, and a gas explosion linkage control module, wherein:

[0068] The data acquisition module is used to collect and store the basic data required for gas over-limit risk and fire risk warning from security monitoring, fire monitoring, intelligent ventilation, production operation, extraction monitoring and other systems;

[0069] The gas over-limit warning module is used to analyze and judge the gas over-limit risk based on the gas over-limit warning basic data to obtain the gas over-limit warning risk level;

[0070] The fire risk warning module is used to analyze and judge the fire risk based on the fire warning basic data to obtain the fire warning risk level;

[0071] The gas explosion warning module is used to determine the corresponding rules for comprehensive risk assessment based on the gas over-limit risk level and the fire safety risk level according to different combinations of the location characteristics and time characteristics of the gas over-limit risk level and the fire safety risk level, and determine the gas explosion warning result according to the corresponding rules;

[0072] The gas explosion early warning linkage control module performs linkage control on underground ventilation equipment and production equipment according to the gas explosion early warning results to eliminate or reduce the risk of gas explosion;

[0073] The gas explosion risk emergency rescue module is used for gas explosion evacuation route generation, emergency rescue material management, and emergency plan calling.

[0074] The beneficial effects of the present invention are:

[0075] The present invention integrates the early warning results of gas concentration over-limit risk and fire risk in time and space, discovers the hidden dangers contained in various production and safety data in the coal mining process, predicts the gas explosion risk of the mining face in the future, and obtains the gas explosion risk level, thereby effectively guiding the implementation and formulation of gas disaster and fire prevention and control measures.

[0076] The present invention takes into account both the gas over-limit risk warning level and the fire risk warning level, and warns of gas explosions based on the relationship between the gas over-limit risk and the time-space intersection of the fire source, thereby ensuring the accuracy of the gas explosion warning results. At the same time, various gas and fire monitoring data are collected in real time through data acquisition software, and the gas explosion risk warning system analyzes these collected data in real time and publishes gas explosion warning results in real time.

[0077] Other advantages, objectives and features of the present invention will be described in the following description to some extent, and to some extent, will be obvious to those skilled in the art based on the following examination and study, or can be taught from the practice of the present invention. The objectives and other advantages of the present invention can be realized and obtained through the following description. BRIEF DESCRIPTION OF THE DRAWINGS

[0078] In order to make the purpose, technical solutions and advantages of the present invention more clear, the present invention will be described in detail below in conjunction with the accompanying drawings, wherein:

[0079] Figure 1 It is a schematic diagram of the overall process of the gas explosion risk early warning method of the present invention;

[0080] Figure 2 It is a schematic diagram of the overall structure of the gas explosion risk early warning system of the present invention. DETAILED DESCRIPTION

[0081] The following describes the embodiments of the present invention by specific examples, and those skilled in the art can easily understand other advantages and effects of the present invention from the contents disclosed in this specification. The present invention can also be implemented or applied through other different specific embodiments, and the details in this specification can also be modified or changed in various ways based on different viewpoints and applications without departing from the spirit of the present invention. It should be noted that the illustrations provided in the following embodiments only illustrate the basic concept of the present invention in a schematic manner, and the following embodiments and features in the embodiments can be combined with each other without conflict.

[0082] Among them, the drawings are only used for illustrative explanations, and they only represent schematic diagrams rather than actual pictures, and should not be understood as limitations on the present invention. In order to better illustrate the embodiments of the present invention, some parts of the drawings may be omitted, enlarged or reduced, and do not represent the size of actual products. For those skilled in the art, it is understandable that some well-known structures and their descriptions in the drawings may be omitted.

[0083] The same or similar numbers in the drawings of the embodiments of the present invention correspond to the same or similar parts; in the description of the present invention, it should be understood that if the terms "upper", "lower", "left", "right", "front", "rear", etc. indicate the orientation or position relationship, they are based on the orientation or position relationship shown in the drawings, which is only for the convenience of describing the present invention and simplifying the description, rather than indicating or implying that the device or element referred to must have a specific orientation, be constructed and operate in a specific orientation. Therefore, the terms describing the position relationship in the drawings are only used for illustrative purposes and cannot be understood as limiting the present invention. For ordinary technicians in this field, the specific meanings of the above terms can be understood according to specific circumstances.

[0084] See also Figure 1-2 , which is a gas explosion risk early warning method and system.

[0085] Example

[0086] This embodiment first provides a gas explosion risk early warning method, such as Figure 1 As shown, it includes the following steps:

[0087] S1. Collect gas over-limit risk warning characteristic indicators and fire risk warning characteristic indicators at the warning locations respectively, and form a gas over-limit risk indicator matrix X and a fire risk indicator matrix Y respectively;

[0088] S2, establishing a safe state matrix A1 and a dangerous state matrix W1 of gas over-limit risk characteristic index values, as well as a safe state matrix A2 and a dangerous state matrix W2 of fire risk index values;

[0089] S3, respectively calculating the distances J1 and J2 between the gas over-limit risk characteristic index value and the safe state matrix and the dangerous state matrix, and the distances G1 and G2 between the fire risk index value and the safe state matrix and the dangerous state matrix;

[0090] S4. Calculate the gas over-limit risk status evaluation score s and the fire safety risk status evaluation score e according to the corresponding distance parameters, and obtain the corresponding risk level;

[0091] S5. According to different combinations of location characteristics and time characteristics of gas over-limit risk level and fire safety risk level, determine corresponding rules for comprehensive risk assessment based on gas over-limit risk level and fire safety risk level, and determine gas explosion warning results based on the corresponding rules;

[0092] S6. Control the corresponding linkage equipment to perform warning processing according to the determined gas explosion warning result.

[0093] In step S1 of this embodiment, the gas over-limit risk warning characteristic indicators at the warning location are collected, mainly including: gas outflow, gas concentration, air volume, extraction pure amount, coal seam thickness, coal seam inclination, and daily footage indicators, to form a gas over-limit risk indicator matrix X:

[0094] X = [x1, x2, x3…x n ]

[0095] Among them, x1, x2, …x n They are respectively the characteristic index values ​​of gas exceeding limit.

[0096] Collect fire risk warning characteristic indicators at the warning location, mainly including: carbon monoxide, carbon-oxygen ratio, temperature, and carbon dioxide indicators, to form a fire risk indicator matrix Y:

[0097] Y=[y1,y2,y3…y n ]

[0098] Among them, y1, y2…y n are fire risk characteristic index values ​​respectively.

[0099] In step S2 of this embodiment, a safe state matrix A1 and a dangerous state matrix W1 of each characteristic index value of gas over-limit risk are constructed:

[0100] A1=[x 11 ,x 21 , x 31 …x n1 ]

[0101] W1=[x 12 , x 22 , x 32 …x n2 ]

[0102] Where: x 11 、x 21 、x 31 …x n1 are the lowest values ​​that can be obtained under the safe state of each characteristic indicator. 12 、x 22 、x 32 …x n2 are the critical values ​​of each characteristic indicator reaching a serious dangerous state.

[0103] Construct the safe state matrix A2 and dangerous state matrix W2 of each characteristic index value of fire risk:

[0104] A2=[y 11 ,y 21 ,y 31 …y n1 ]

[0105] W2=[y 12 ,y 22 ,y 32 …y n2 ]

[0106] Where: y 11 ,y 21 ,y 31 …y n1 They are the lowest values ​​that can be obtained under the safe state of each characteristic indicator. 12 ,y 22 ,y 32 …y n2 are the critical values ​​of each characteristic indicator reaching a serious dangerous state.

[0107] In step S3 of this embodiment, the distances J1 and J2 of the evaluation indexes of each gas over-limit characteristic index value from the safe state matrix and the dangerous state matrix are calculated:

[0108]

[0109]

[0110] Calculate the distance G1 and G2 of the evaluation index of each fire risk characteristic index value from the safe state matrix and the dangerous state matrix respectively:

[0111]

[0112]

[0113] The above distance values ​​are used to measure the position of the gas over-limit characteristic index value and the fire risk characteristic index value in the multidimensional space, and the straight-line distance between the safe state and the dangerous state. These distance values ​​not only help to evaluate the proximity of the fire risk characteristic index value to the safe or dangerous state, but also provide an important quantitative basis for fire risk assessment, classification and clustering.

[0114] In step S4 of this embodiment, the gas over-limit risk status evaluation score s of the warning location is calculated according to J1 and J2:

[0115]

[0116] Compare the evaluation scores s with s0. If s>s0, it is judged as low risk; if s1<s≤s0, it is judged as medium risk; if s≤s1, it is judged as high risk, where s0 and s1 are the critical values ​​of low risk, medium risk and high risk; s0 and s1 are both greater than 0.

[0117] Calculate the fire safety risk status evaluation score e of the warning location based on G1 and G2:

[0118]

[0119] Compare the evaluation scores e and e0. If e>e0, it is judged as low risk; if e1<e≤e0, it is judged as medium risk; if e≤e1, it is judged as high risk, where e0 and e1 are the critical values ​​of low risk, medium risk and high risk, and e0 and e1 are both greater than 0.

[0120] In step S5 of this embodiment, the gas explosion warning result is obtained by integrating the gas over-limit risk and fire risk warning results. Gas explosion is the result of the spatial and temporal cross-fusion of gas over-limit and fire source. Therefore, based on the different spatial and temporal cross-situations of gas risk and fire risk, the gas explosion warning result is judged. The judgment method is as follows:

[0121] (1) If the gas over-limit risk and fire risk warning results occur at the same location and in the same shift, the gas explosion warning result evaluation rules are shown in Table 1:

[0122] Table 1

[0123]

[0124] (2) If gas over-limit risk and fire risk warning results occur at the same location but in different shifts, the gas explosion warning result evaluation rules are as shown in Table 2:

[0125] Table 2

[0126]

[0127]

[0128] (3) If gas over-limit and fire warning results occur at different locations and during the same shift, the gas explosion warning result evaluation rules are as shown in Table 3:

[0129] Table 3

[0130]

[0131] (4) If the gas over-limit and fire warning results occur at different locations during different shifts, the gas explosion warning result evaluation rules are as shown in Table 4:

[0132] Table 4

[0133]

[0134] In order to clearly demonstrate the method of identifying gas explosion warning results, the following examples are given for illustration.

[0135] Case 1: In a certain shift at a certain working face, gas over-limit and fire warning occurred simultaneously. The gas over-limit warning level was medium risk, and the fire risk level was high risk. Since the gas over-limit risk and fire risk warning results occurred at the same location and in the same shift, according to the identification rules in Table 1, the gas explosion warning result of the working face was high risk.

[0136] Case 2: A certain working face issued a medium-risk warning for gas overlimit in the middle shift on July 2, 2024, and a medium-risk warning for fire in the morning shift on July 4, 2024. The working face meets the warning results of gas overlimit risk and fire risk occurring at the same location but not at the same time. The identification rules in Table 2 are used for identification, and the gas explosion warning result of the working face is medium risk.

[0137] In step S6 of this embodiment, if both the gas over-limit risk and the gas explosion risk are warned at medium risk or above, the local ventilator and the damper and window are adjusted to increase the air volume at the warning location, reducing the gas over-limit risk level to a low risk, i.e., a safe state.

[0138] The calculation method for increasing the wind volume f at the warning location is:

[0139]

[0140] In the formula: C is the gas concentration value of the working face or the predicted value of the gas concentration, C0 is the gas concentration alarm critical value, f0 is the current working face air supply, and f is the adjusted working face air volume.

[0141] In order to clearly show the calculation method of adjusting the air volume f at the warning location, the following example is given for illustration. For example, the predicted gas concentration value of a certain shift at a certain excavation face reaches 1.1%, reaching a high risk of gas exceeding the limit and gas explosion; the gas concentration alarm critical value C0 set for the face is 0.8%, and the actual air supply f0 is 560m 3 / min, the adjusted working face air volume f is:

[0142]

[0143] If adjusting the ventilation equipment cannot reduce the risk of gas exceeding the limit at the warning location, the production equipment will be regulated to reduce the coal cutting speed and daily output to achieve the goal of reducing gas concentration and the risk of gas exceeding the limit.

[0144] The calculation method for reducing the coal cutting speed Δg is:

[0145] Δg=(Q-Q0) / k1

[0146] Where: Q is the current gas emission of the working face or the predicted value of gas emission, Q0 is the critical value of gas emission alarm, k1 is the influence coefficient of tunneling speed, and Δg is the reduction in coal cutting speed.

[0147] In order to clearly demonstrate the calculation method of reducing the coal cutting speed Δg, the following example is given for illustration. For example, the absolute gas outburst volume of a certain shift at a certain excavation face reaches 3.42m 3 / min, more than 2.88m 3 / min, reaching the critical value of gas over-limit and gas explosion. After investigation, the excavation speed influence coefficient k1 of the working face is 1.15, and the planned excavation speed of the shift is 4m / d. Since the working face excavator cannot be frequency-controlled and the air volume cannot be adjusted, the production equipment is regulated to reduce the coal cutting speed and daily output, and the coal cutting speed Δg is reduced to:

[0148] Δg=(3.42-2.88) / 1.15=0.47m / d

[0149] Therefore, the excavation speed of this working face needs to be reduced by at least 0.47m / d based on the originally planned advance, that is, the maximum is 3.53m / d.

[0150] This embodiment also proposes a gas explosion risk warning system for executing the aforementioned gas explosion risk warning method, such as Figure 2As shown, it includes a data acquisition module, a gas over-limit warning module, a fire risk warning module, a gas explosion warning module, a gas explosion risk emergency rescue module, and a gas explosion linkage control module; the data acquisition module is used to collect and store the basic data required for gas over-limit risk and fire risk warning from safety monitoring, fire monitoring, intelligent ventilation, production operation, extraction monitoring and other systems; the gas over-limit warning module is mainly used to analyze and judge the gas over-limit risk based on the gas over-limit warning basic data to obtain the gas over-limit warning risk level; the fire risk warning module is mainly used to analyze and judge the fire risk based on the fire warning basic data to obtain Fire warning risk level; the gas explosion warning module is mainly used to determine the corresponding rules for comprehensive risk assessment based on the gas over-limit risk level and the fire safety risk level according to different combinations of the location characteristics and time characteristics of the gas over-limit risk level and the fire safety risk level, and determine the gas explosion warning results according to the corresponding rules; the gas explosion warning linkage control module is mainly used to carry out linkage control of underground ventilation equipment and production equipment according to the gas explosion warning results, so as to eliminate or reduce the risk of gas explosion; the gas explosion risk emergency rescue module is mainly used for the generation of gas explosion evacuation routes, emergency rescue material management, and emergency plan calling.

[0151] Finally, it should be noted that the above embodiments are only used to illustrate the technical solution of the present invention rather than to limit it. Although the present invention has been described in detail with reference to the preferred embodiments, those skilled in the art should understand that the technical solution of the present invention can be modified or replaced by equivalents without departing from the purpose and scope of the technical solution, which should be included in the scope of the claims of the present invention.

Claims

1. A gas explosion risk early warning method, characterized in that: The method comprises the following steps: S1. Collect gas over-limit risk warning characteristic indicators and fire risk warning characteristic indicators at the warning locations respectively, and form a gas over-limit risk indicator matrix X and a fire risk indicator matrix Y respectively; S2, establishing a safe state matrix A1 and a dangerous state matrix W1 of gas over-limit risk characteristic index values, as well as a safe state matrix A2 and a dangerous state matrix W2 of fire risk index values; S3, respectively calculating the distances J1 and J2 between the gas over-limit risk characteristic index value and the safe state matrix and the dangerous state matrix, and the distances G1 and G2 between the fire risk index value and the safe state matrix and the dangerous state matrix; S4. Calculate the gas over-limit risk status evaluation score s and the fire safety risk status evaluation score e according to the corresponding distance parameters, and obtain the corresponding risk level; S5. According to different combinations of location characteristics and time characteristics of gas over-limit risk level and fire safety risk level, determine corresponding rules for comprehensive risk assessment based on gas over-limit risk level and fire safety risk level, and determine gas explosion warning results based on the corresponding rules; S6. Control the corresponding linkage equipment to perform warning processing according to the determined gas explosion warning result.

2. A gas explosion risk early warning method according to claim 1, characterized in that: In step S1, the gas over-limit risk index matrix X is expressed as: X=[x1,x2,x3…x n ] Among them, x1, x2, …x n They are respectively gas over-limit characteristic index values, which at least include: gas outburst volume, gas concentration, air volume, extraction pure volume, coal seam thickness, coal seam inclination, and daily advance index; The fire risk index matrix Y is expressed as: <h2 style=";text-align:left;direction:ltr">Y = [y1,y2,y3…y<h2 style=";text-align:left;direction:ltr"> n <h2 style=";text-align:left;direction:ltr"> ] Among them, y1, y2…y n They are fire risk characteristic index values ​​respectively, and the fire risk characteristic index values ​​at least include: carbon monoxide, carbon-oxygen ratio, temperature, and carbon dioxide index.

3. A gas explosion risk early warning method according to claim 1, characterized in that: In step S2, the safe state matrix A1 and dangerous state matrix W1 of each characteristic index value of gas over-limit risk are respectively expressed as: A1=[x 11 ,x 21 ,x 31 …x n1 ] W1=[x 12 ,x 22 ,x 32 …x n2 ] Where: x 11 、x 21 、x 31 …x n1 are the lowest values ​​that can be obtained under the safe state of each characteristic index, x 12 、x 22 、x 32 …x n2 are the critical values ​​of each characteristic indicator reaching a serious dangerous state; The safety state matrix A2 and the dangerous state matrix W2 of each characteristic index value of fire risk are expressed as: A2=[y 11 ,y 21 ,y 31 …y n1 ] W2=[and 12 ,and 22 ,and 32 …and n2 ] Where: y 11 ,y 21 ,y 31 …y n1 are the lowest values ​​that can be obtained under the safe state of each characteristic index, y 12 ,y 22 ,y 32 …y n2 are the critical values ​​of each characteristic indicator reaching a serious dangerous state.

4. A gas explosion risk early warning method according to claim 1, characterized in that: In step S3, the gas over-limit characteristic index value x i The distance from each element x in the safe state matrix A1 i1 The distance J1 between them and the distance x from each element in the dangerous state matrix W1 i2 The distance J2 between them is expressed as: Fire risk characteristic index value y i The distance from each element y in the safe state matrix A2 i1 The distance G1 between them and the distance y from each element in the dangerous state matrix W2 i2 The distance G2 between them is expressed as: The above distance values ​​are used to measure the positions of the gas over-limit characteristic index values ​​and the fire risk characteristic index values ​​in the multidimensional space.

5. A gas explosion risk early warning method according to claim 1, characterized in that: In step S4, the gas over-limit risk status evaluation score s of the warning location is calculated based on J1 and J2: Compare the evaluation scores s and s0. If s>s0, it is judged as low risk; if s1<s≤s0, it is judged as medium risk; if s≤s1, it is judged as high risk, where s0 and s1 are the critical values ​​of low risk, medium risk and high risk; Calculate the fire safety risk status evaluation score e of the warning location based on G1 and G2: Compare the evaluation scores e with e0. If e>e0, it is judged as low risk; if e1<e≤e0, it is judged as medium risk; if e≤e1, it is judged as high risk, where e0 and e1 are the critical values ​​of low risk, medium risk and high risk.

6. A gas explosion risk early warning method according to claim 5, characterized in that: In step S5, the gas explosion warning result is obtained based on the different spatial and temporal intersections of gas risk and fire risk, and the gas over-limit risk level and fire risk level, wherein the different spatial and temporal intersections of gas risk and fire risk include at least the following combinations: (1) The gas over-limit risk and fire risk warning results occur at the same location and during the same period; (2) The gas over-limit risk and fire risk warning results occurred at the same location but not at the same time; (3) The gas over-limit risk and fire risk warning results occurred in different locations but in the same period; (4) The gas over-limit risk and fire risk warning results occurred in different locations and at different times.

7. A gas explosion risk early warning method according to claim 6, characterized in that: For different time-space cross combinations, different comprehensive evaluation rules are set, among which, (1) When the gas over-limit risk and fire risk warning results occur at the same location and during the same period, the comprehensive evaluation rules are as follows: If the risk of gas exceeding the limit is low, then the risk of gas explosion is low when the fire risk is low, the risk of gas explosion is medium when the fire risk is medium, and the risk of gas explosion is high when the fire risk is high; If the gas over-limit risk is medium, then the gas explosion risk is medium when the fire risk is low, the gas explosion risk is high when the fire risk is medium, and the gas explosion risk is high when the fire risk is high; If the gas over-limit risk is high, then the gas explosion risk is high when the fire risk is low, the gas explosion risk is high when the fire risk is medium, and the gas explosion risk is high when the fire risk is high; (2) If the gas over-limit risk and fire risk warning results occur at the same location but not at the same time, the comprehensive evaluation rules are as follows: If the risk of gas exceeding the limit is low, then the risk of gas explosion is low when the fire risk is low, the risk of gas explosion is low when the fire risk is medium, and the risk of gas explosion is medium when the fire risk is high; If the gas over-limit risk is medium, then the gas explosion risk is low when the fire risk is low, the gas explosion risk is medium when the fire risk is medium, and the gas explosion risk is high when the fire risk is high; If the gas over-limit risk is high, the gas explosion risk is medium when the fire risk is low, the gas explosion risk is high when the fire risk is medium, and the gas explosion risk is high when the fire risk is high; (3) For gas over-limit risk and fire risk warning results occurring in different locations but in the same period, the comprehensive evaluation rules are as follows: If the risk of gas exceeding the limit is low, then the risk of gas explosion is low when the fire risk is low, the risk of gas explosion is low when the fire risk is medium, and the risk of gas explosion is medium when the fire risk is high; If the risk of gas exceeding the limit is medium, then the risk of gas explosion is low when the fire risk is low, the risk of gas explosion is medium when the fire risk is medium, and the risk of gas explosion is medium when the fire risk is high; If the gas over-limit risk is high, the gas explosion risk is medium when the fire risk is low, the gas explosion risk is high when the fire risk is medium, and the gas explosion risk is high when the fire risk is high; (4) For gas over-limit risk and fire risk warning results occurring at different locations and at different times, the comprehensive evaluation rules are as follows: If the risk of gas exceeding the limit is low, then the risk of gas explosion is low when the fire risk is low, the risk of gas explosion is low when the fire risk is medium, and the risk of gas explosion is low when the fire risk is high; If the risk of gas exceeding the limit is medium, then the risk of gas explosion is low when the fire risk is low, the risk of gas explosion is low when the fire risk is medium, and the risk of gas explosion is medium when the fire risk is high; If the risk of gas exceeding the limit is high, then the risk of gas explosion is low when the fire risk is low; the risk of gas explosion is medium when the fire risk is medium; and the risk of gas explosion is high when the fire risk is high.

8. A gas explosion risk early warning method according to claim 1, characterized in that: In step S6, if the gas over-limit risk and the gas explosion warning results are both above the medium risk, the local ventilator or the damper and window are adjusted to increase the air volume at the warning location. The calculation method for increasing the air volume f at the warning location is: Where: C is the gas concentration value of the working face or the predicted value of the gas concentration, C0 is the critical value of the gas concentration alarm, f0 is the current air supply volume of the working face, and f is the air volume of the working face after adjustment; If adjusting the ventilation equipment cannot reduce the risk of gas over-limit and gas explosion at the warning location, the production equipment should be regulated to reduce the coal cutting speed and daily output. The calculation method for reducing the coal cutting speed Δg is: Δg=(Q-Q0) / k1 Where: Q is the current gas emission of the working face or the predicted value of gas emission, Q0 is the critical value of gas emission alarm, k1 is the influence coefficient of tunneling speed, and Δg is the reduction in coal cutting speed.

9. A gas explosion risk early warning system, characterized in that: The system is used to execute the gas explosion risk warning method described in any one of claims 1 to 8, and comprises: a data acquisition module, a gas over-limit warning module, a fire risk warning module, a gas explosion warning module, a gas explosion risk emergency rescue module, and a gas explosion linkage control module, wherein: The data acquisition module is used to collect and store the basic data required for gas over-limit risk and fire risk warning from safety monitoring, fire monitoring, intelligent ventilation, production operation, and extraction monitoring systems; The gas over-limit warning module is used to analyze and judge the gas over-limit risk based on the gas over-limit warning basic data to obtain the gas over-limit warning risk level; The fire risk warning module is used to analyze and judge the fire risk based on the fire warning basic data to obtain the fire warning risk level; The gas explosion warning module is used to determine the corresponding rules for comprehensive risk assessment based on the gas over-limit risk level and the fire safety risk level according to different combinations of the location characteristics and time characteristics of the gas over-limit risk level and the fire safety risk level, and determine the gas explosion warning result according to the corresponding rules; The gas explosion early warning linkage control module performs linkage control on underground ventilation equipment and production equipment according to the gas explosion early warning results to eliminate or reduce the risk of gas explosion; The gas explosion risk emergency rescue module is used for gas explosion evacuation route generation, emergency rescue material management, and emergency plan calling.

Images