Gas explosion risk early warning method and system

Abstract

The present invention relates to a gas explosion risk warning method and system, belonging to the field of coal mine safety. The method obtains corresponding risk levels by collecting and processing gas over-limit risk warning characteristic indicators and fire risk warning characteristic indicators at the warning location, and then determines 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 location characteristics and time characteristics of the gas over-limit risk level and the fire safety risk level, and determines the gas explosion warning result according to the corresponding rules; and controls the corresponding linkage equipment to perform a warning response based on the determined gas explosion warning result. The system is used to execute the method. The present invention takes into account gas over-limit and fire risks, and warns of gas explosions based on the relationship between the temporal and spatial intersection of gas over-limit risk and fire source, thereby ensuring the accuracy of the gas explosion warning result.

Description

Technical Field

[0001] The present 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 coal mining in my country increases in depth, gas content and pressure in coal mines are increasing, raising the risk of abnormal gas outbursts and explosions. With the advancement and deepening of information-based mine construction in my country, the automated collection and integration of data provides the technical means and potential for intelligent early warning of gas explosions. In my country's underground coal mines, both high-gas mines, low-gas mines, and mines with outbursts face the risk of gas explosions. It is noteworthy that the gas explosion risk faced by low-gas mines is often overlooked, leading to poor gas hazard management. Consequently, low-gas mines are also at risk of gas explosions, and even particularly severe ones. The conditions for a gas explosion to occur require a gas concentration of 5% to 16%, an oxygen concentration of at least 12%, and an ignition source energy of at least 650°C. These three conditions must all be met for a gas explosion to occur. Due to the large number of personnel working underground, the oxygen concentration required for a gas explosion is always present. Therefore, to prevent gas explosions, the only two conditions to be controlled are gas concentration and ignition source. 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, 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 for gas over-limit risk characteristic index values, as well as a safe state matrix A2 and a dangerous state matrix W2 for 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 based on the corresponding distance parameters, and obtain the corresponding risk level;

[0010] S5. Determine corresponding rules for comprehensive risk assessment based on the gas over-limit risk level and the fire safety risk level based on different combinations of 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 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] Furthermore, 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 emission volume, gas concentration, air volume, extraction volume, coal seam thickness, coal seam inclination, and daily footage 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, which include at least: carbon monoxide, carbon-oxygen ratio, temperature, and carbon dioxide index.

[0018] Furthermore, 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:

[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 safety state of each characteristic indicator, x12 、x 22 、x 32 …x n2 are the critical values ​​of each characteristic indicator reaching a serious dangerous state;

[0022] The safe state matrix A2 and 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 safety state of each characteristic indicator, y 12 、y 22 、y 32 …y n2 are the critical values ​​of each characteristic indicator reaching a serious dangerous state.

[0026] Furthermore, 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 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 excess characteristic index values ​​and the fire risk characteristic index values ​​in the multidimensional space.

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

[0034]

[0035] Compare the evaluation score 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;

[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 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.

[0039] Furthermore, 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. 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 gas over-limit risk is low, then the gas explosion risk is low when the fire risk is low; if the fire risk is medium, then the gas explosion risk is medium; if the fire risk is high, then the gas explosion 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; if the fire risk is medium, then the gas explosion risk is high; if the fire risk is high, then the gas explosion 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; if the fire risk is medium, then the gas explosion risk is high; and if the fire risk is high, then the gas explosion risk is high.

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

[0050] If the gas over-limit risk is low, then the gas explosion risk is low when the fire risk is low; if the fire risk is medium, then the gas explosion risk is low; if the fire risk is high, then the gas explosion risk is medium.

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

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

[0055] 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 medium when the fire risk is high;

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

[0059] If the gas over-limit risk is medium, then the gas explosion risk is low when the fire risk is low; if the fire risk is medium, then the gas explosion risk is low; if the fire risk is high, then the gas explosion risk is medium.

[0060] If the gas over-limit risk is high, 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.

[0061] Furthermore, 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] Where: C is the gas concentration value or gas concentration prediction value of the working face, C0 is the gas concentration alarm critical value, f0 is the current working face air supply volume, and f is the working face air volume 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 volume of the working face or the predicted value of gas emission volume, Q0 is the critical value of gas emission volume 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 aforementioned 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 systems such as safety monitoring, fire monitoring, intelligent ventilation, production operations, and extraction monitoring;

[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 fire safety risk level according to different combinations of location characteristics and time characteristics of the gas over-limit risk level and 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 generating gas explosion evacuation routes, managing emergency rescue materials, and calling emergency plans.

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

[0075] The present invention integrates the early warning results of gas concentration exceeding limit risk and fire risk in time and space, discovers the hidden dangers contained in various production and safety data during coal mining, 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] This invention considers both the gas overlimit risk warning level and the fire risk warning level, providing early warnings for gas explosions based on the temporal and spatial intersection of gas overlimit risk and fire sources, ensuring the accuracy of gas explosion warnings. Simultaneously, various gas and fire monitoring data are collected in real time using data acquisition software. The gas explosion risk warning system analyzes this data in real time and issues gas explosion warning results in real time.

[0077] Other advantages, objects, and features of the present invention will be described in part in the following description and, in part, will be apparent to those skilled in the art upon examination of the following description or may be learned from practice of the present invention. The objects and other advantages of the present invention may 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 with reference to the accompanying drawings, in which:

[0079] Figure 1 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 means of 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 are only schematic illustrations of the basic concept of the present invention, and the following embodiments and features in the embodiments can be combined with each other without conflict.

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

[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 there are terms such as "upper", "lower", "left", "right", "front", "back", etc. indicating directions or positional relationships, they are based on the directions or positional relationships shown in the drawings. They are only for the convenience of describing the present invention and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific direction, be constructed and operate in a specific direction. Therefore, the terms describing the positional 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 Figures 1 and 2 , which is a gas explosion risk early warning method and system.

[0085] Example

[0086] This embodiment first provides a gas explosion risk 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, 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 for gas over-limit risk characteristic index values, as well as a safe state matrix A2 and a dangerous state matrix W2 for 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 based on the corresponding distance parameters, and obtain the corresponding risk level;

[0091] S5. Determine corresponding rules for comprehensive risk assessment based on the gas over-limit risk level and the fire safety risk level based on different combinations of 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 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, characteristic indicators of gas over-limit risk warning at the warning location are collected, mainly including: gas emission volume, gas concentration, air volume, extraction volume, 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 are respectively the gas over-limit characteristic index values.

[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 characteristic index values ​​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 are the lowest values ​​that can be obtained under the safety 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 index 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] These distance values ​​are used to measure the position of gas overlimit and fire risk characteristic indices in multidimensional space, and their linear distances from safe and dangerous states. These distances not only help assess the proximity of fire risk characteristic indices to safe or dangerous states, 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 based on 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, the risk is low; if e1<e≤e0, the risk is medium; if e≤e1, the risk is high, where e0 and e1 are the critical values ​​for low, medium, and high risks, respectively, and both e0 and e1 are 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 spatiotemporal intersection of gas over-limit and fire source. Therefore, the gas explosion warning result is evaluated based on the different spatiotemporal intersections of gas risk and fire risk. The evaluation method is as follows:

[0121] (1) If the gas over-limit risk and fire risk warning results occur at the same location and on 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 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: A gas overlimit and fire warning occurred simultaneously on a certain working face during a certain shift. The gas overlimit warning level was medium risk, and the fire risk level was high risk. Since the gas overlimit risk and fire risk warning results occurred at the same location and during the same shift, according to the identification rules in Table 1, the gas explosion warning result for this working face was high risk.

[0136] Case 2: A certain working face issued a medium-risk warning for gas exceeding the limit during the afternoon shift on July 2, 2024, and a medium-risk warning for fire during the morning shift on July 4, 2024. This working face meets the conditions for gas exceeding the limit risk and fire risk warnings occurring at the same location but at different time periods. According to the identification rules in Table 2, the gas explosion warning result for this working face is medium risk.

[0137] In step S6 of this embodiment, if both the gas over-limit risk and the gas explosion risk generate medium risk or above warnings, the local ventilator and the dampers and windows 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 volume, and f is the adjusted working face air volume.

[0141] To clearly demonstrate 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 threshold C0 set for this face is 0.8%, and the actual air supply volume f0 is 560m 3 / min, the adjusted working surface 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 purpose 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 volume of the working face or the predicted value of gas emission volume, Q0 is the critical value of gas emission volume 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 emission volume of a certain shift in a certain excavation face is 3.42m 3 / min, more than 2.88m 3 / min, reaching a critical value, reaching a high risk of gas exceeding the limit and gas explosion. After investigation, the excavation speed influence coefficient k1 of this working face is 1.15, and the planned excavation speed for the current shift is 4m / d. Since the working face tunnel boring machine 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. 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, and 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, and 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 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 achieve the purpose of eliminating or reducing the gas explosion risk; the gas explosion risk emergency rescue module is mainly used for gas explosion disaster avoidance route generation, emergency rescue material management, emergency plan calling, etc.

[0151] Finally, it should be noted that the above embodiments are only used to illustrate the technical solutions of the present invention and are not limiting. 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 solutions of the present invention can be modified or replaced by equivalents without departing from the purpose and scope of the technical solutions, which should all be included in the scope of the claims of the present invention.

Claims

1. A gas explosion risk early warning method, characterized by: 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, 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 for gas over-limit risk characteristic index values, as well as a safe state matrix A2 and a dangerous state matrix W2 for 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 based on the corresponding distance parameters, and obtain the corresponding risk level; S5. Determine corresponding rules for comprehensive risk assessment based on the gas over-limit risk level and the fire safety risk level based on different combinations of 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 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 emission volume, gas concentration, air volume, extraction volume, coal seam thickness, coal seam inclination, and daily footage 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, which include at least: 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 safety state of each characteristic indicator, x 12 、x 22 、x 32 …x n2 are the critical values ​​of each characteristic indicator reaching a serious dangerous state; The safe state matrix A2 and 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=[y 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 safety state of each characteristic indicator, 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 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 excess 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 score 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; Calculate the fire safety risk status evaluation score e of the warning location based on G1 and G2: 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.

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 limit risk level and fire risk level. 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 gas over-limit risk is low, then the gas explosion risk is low when the fire risk is low; if the fire risk is medium, then the gas explosion risk is medium; if the fire risk is high, then the gas explosion risk is high. If the gas over-limit risk is medium, then the gas explosion risk is medium when the fire risk is low; if the fire risk is medium, then the gas explosion risk is high; if the fire risk is high, then the gas explosion risk is high. If the gas over-limit risk is high, then the gas explosion risk is high when the fire risk is low; if the fire risk is medium, then the gas explosion risk is high; and if the fire risk is high, then the gas explosion risk is high. (2) For gas over-limit risk and fire risk warning results that occur at the same location but not at the same time, the comprehensive evaluation rules are as follows: If the gas over-limit risk is low, then the gas explosion risk is low when the fire risk is low; if the fire risk is medium, then the gas explosion risk is low; if the fire risk is high, then the gas explosion risk is medium. If the gas over-limit risk is medium, then the gas explosion risk is low when the fire risk is low; if the fire risk is medium, then the gas explosion risk is medium; and if the fire risk is high, then the gas explosion risk is high. If the gas over-limit risk is high, then the gas explosion risk is medium when the fire risk is low; if the fire risk is medium, then the gas explosion risk is high; and if the fire risk is high, then the gas explosion 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 gas over-limit risk is low, then the gas explosion risk is low when the fire risk is low; if the fire risk is medium, then the gas explosion risk is low; if the fire risk is high, then the gas explosion risk is medium. 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 medium when the fire risk is high; If the gas over-limit risk is high, then the gas explosion risk is medium when the fire risk is low; if the fire risk is medium, then the gas explosion risk is high; and if the fire risk is high, then the gas explosion 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 gas over-limit risk is low, then the gas explosion risk is low when the fire risk is low; if the fire risk is medium, then the gas explosion risk is low; and if the fire risk is high, then the gas explosion risk is low. If the gas over-limit risk is medium, then the gas explosion risk is low when the fire risk is low; if the fire risk is medium, then the gas explosion risk is low; if the fire risk is high, then the gas explosion risk is medium. If the gas over-limit risk is high, 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.

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 gas explosion warning results are both above medium risk, 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: Where: C is the gas concentration value or gas concentration prediction value of the working face, C0 is the gas concentration alarm critical value, f0 is the current working face air supply volume, and f is the working face air volume after adjustment; If adjusting the ventilation equipment cannot reduce the risk of gas exceeding the 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 volume of the working face or the predicted value of gas emission volume, Q0 is the critical value of gas emission volume 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 by: The system is used to execute the gas explosion risk warning method according to 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 fire safety risk level according to different combinations of location characteristics and time characteristics of the gas over-limit risk level and 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 generating gas explosion evacuation routes, managing emergency rescue materials, and calling emergency plans.

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