A gas disaster risk emergency linkage comprehensive early warning method

Abstract

The present application relates to a kind of gas disaster risk emergency linkage comprehensive early warning method, belong to coal mine safety production disaster prevention field.The existing evaluation method relies on single gas index, leading to one-sided inaccurate risk assessment, the present application scheme includes: obtaining the gas content or pressure of the region to be evaluated, coal firmness coefficient, buried depth, coal seam inclination and coal seam thickness parameters;Based on formula, calculate gas initial grade Y1, coal body structure influence degree Y2, buried depth influence degree Y3, inclination influence degree Y4 and thickness influence degree Y5;The average value of Y1 to Y5 is comprehensive rating Y;According to Y value, five levels of risk grade are divided.The present application significantly improves the accuracy and reliability of risk assessment, provides clear and scientific classification guidance, facilitates fine emergency management in coal mine site, enhances operability and application value.

Description

Technical Field

[0001] This invention belongs to the field of coal mine safety production, disaster prevention and emergency rescue, and specifically relates to a comprehensive assessment and early warning method for gas disaster risk based on multiple geological and production factors. Background Technology

[0002] Gas disasters are among the major hazards in coal mine production. Accurate risk assessment is crucial for selecting effective prevention and control methods and for risk level identification, directly impacting mine decisions regarding human, material, and financial resources for gas disaster prevention and control. However, most existing gas disaster risk assessment methods rely primarily on single indicators such as gas content or gas pressure. This single-dimensional assessment approach has significant limitations, failing to comprehensively, accurately, and truthfully reflect the actual gas disaster risks faced by the mine working face, thus failing to provide refined and tiered guidance for coal mine gas disaster prevention and control. Therefore, a more scientific and comprehensive assessment method is urgently needed to improve the accuracy and reliability of gas disaster risk assessment. Summary of the Invention

[0003] In view of this, the purpose of this invention is to provide a comprehensive early warning method for emergency response to gas disaster risks. This method can comprehensively consider multiple influencing factors, thereby more accurately and reliably assessing the risk level of gas disasters.

[0004] To achieve the above objectives, the present invention provides the following technical solution: A comprehensive early warning method for emergency response to gas disaster risks includes the following steps: Obtain the gas content of the area to be evaluated W or gas pressure P Coal soundness coefficient f Burial depth h Coal seam dip angle α and coal seam thickness H ; Based on the gas content W or gas pressure P Assess the initial level of gas hazard Y 1; Based on the coal's soundness coefficient f Analyze the impact of coal seam structure on gas disaster risk. Y 2; Based on the burial depth h Analyzing the impact of coal seam depth on gas disaster risk Y 3; Based on the coal seam dip angle α Analyze the impact of coal seam dip angle on gas disaster risk. Y 4; Based on the coal seam thickness H Analyzing the impact of coal seam thickness on the risk of gas disasters Y 5; Regarding the Y 1. Y 2. Y 3. Y 4. Y 5. Calculate the average value to obtain the comprehensive gas disaster risk rating. Y This enables a comprehensive assessment of the risk level of gas disasters.

[0005] Furthermore, the initial level of the gas disaster Y The formula for calculating 1 is:

[0006] in, These are the parameters for determining the initial risk level of a gas disaster; When calculated Y When 1 is less than 1, let Y 1 = 1.

[0007] Furthermore, the aforementioned The value is 0.25; The value is 2.5; The value of is 0.

[0008] Furthermore, the degree of influence of the coal seam structure on the risk of gas disasters. The calculation formula is:

[0009] in, Parameters indicating the degree of influence of coal seam structure on gas disaster risk; When calculated When less than 1, let =1.

[0010] Furthermore, the aforementioned a The value of 2 is 7.3; the aforementioned b The value of 2 is -2.5.

[0011] Furthermore, the degree of impact of the coal seam burial depth on the risk of gas disasters. The calculation formula is:

[0012] in, These are parameters representing the degree of influence of burial depth on the risk of gas disasters; When calculated When less than 1, let =1.

[0013] Furthermore, the degree of influence of the coal seam dip angle on the risk of gas disasters. The calculation formula is:

[0014] in, These are parameters related to the impact of coal seam dip angle on gas hazards; When calculated When less than 1, let =1.

[0015] Furthermore, the degree of influence of the coal seam thickness on the risk of gas disasters. The calculation formula is:

[0016] in, These are parameters related to the impact of coal seam depth on gas hazards; When calculated When less than 1, let =1.

[0017] Furthermore, the comprehensive risk rating of gas disasters... Y The calculation formula is: .

[0018] Furthermore, it also includes the comprehensive risk rating of gas disasters. Y The value is used to classify the risk of gas disasters into five levels: When 1≤ Y When the value is less than 2, it is classified as Level 1; When 2≤ Y When the value is less than 3, it is classified as Level 2; When 3≤ Y When the temperature is below 4, it is classified as Level 3. When 4≤ Y When the value is less than 5, it is level four; when Y A value of ≥5 indicates Level 5.

[0019] The beneficial effects of this invention are as follows: (1) By comprehensively considering five core factors, namely gas content / pressure, coal body firmness, burial depth, coal seam dip angle and coal seam thickness, this invention overcomes the one-sidedness of traditional methods that rely on only a single indicator, making the risk assessment results closer to the actual working conditions and greatly improving the accuracy and reliability of the assessment.

[0020] (2) This invention provides a complete quantitative calculation model that converts various influencing factors into comparable risk level values ​​and finally obtains a comprehensive rating, providing clear and scientific graded guidance for coal mine gas disaster prevention and control, and facilitating the implementation of differentiated and refined safety management measures.

[0021] (3) The evaluation indicators selected in this invention are all conventional geological parameters that are available or easy to measure in coal mine production. The calculation method is clear. It not only provides accurate formula calculation, but also provides a grade classification table that is easy to use in daily management. It has strong on-site operability and promotion application value.

[0022] Other advantages, objectives, and features of the invention will be set forth in part in the description which follows, and in part will be apparent to those skilled in the art from the following examination, or may be learned from practice of the invention. The objectives and other advantages of the invention can be realized and obtained through the following description. Attached Figure Description

[0023] To make the objectives, technical solutions, and advantages of the present invention clearer, the preferred embodiments of the present invention will be described in detail below with reference to the accompanying drawings, wherein: Figure 1 The relationship between gas content and the initial level of gas disaster; Figure 2 for f The degree of impact of the value on the risk of gas disasters; Figure 3 The degree of impact of burial depth on the risk of gas disasters; Figure 4 The degree of influence of coal seam dip angle on gas disaster risk; Figure 5 This refers to the degree of influence of coal seam thickness on the risk of gas disasters. Detailed Implementation

[0024] The following specific examples illustrate the implementation of the present invention. Those skilled in the art can easily understand other advantages and effects of the present invention from the content disclosed in this specification. The present invention can also be implemented or applied through other different specific embodiments, and various details in this specification can be modified or changed 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 representations of the basic concept of the present invention. Unless otherwise specified, the following embodiments and features can be combined with each other.

[0025] The accompanying drawings are for illustrative purposes only and are schematic diagrams, not actual pictures. They should not be construed as limiting the invention. To better illustrate the embodiments of the invention, some parts in the drawings may be omitted, enlarged, or reduced, and do not represent the actual product dimensions. It is understandable to those skilled in the art that some well-known structures and their descriptions may be omitted in the drawings.

[0026] In the accompanying drawings of the embodiments of the present invention, the same or similar reference numerals correspond to the same or similar components. In the description of the present invention, it should be understood that if terms such as "upper," "lower," "left," "right," "front," and "rear" indicate the orientation or positional relationship based on the orientation or positional relationship 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 orientation, or be constructed and operated in a specific orientation. Therefore, the terms used to describe positional relationships in the drawings are only for illustrative purposes and should not be construed as limiting the present invention. For those skilled in the art, the specific meaning of the above terms can be understood according to the specific circumstances.

[0027] This invention is a comprehensive assessment method for gas hazard risk levels, belonging to the fields of coal mine safety production, disaster prevention and control, and emergency rescue. It includes the following steps: S1: Obtain the gas content (W) / pressure (P) of the coal seam, region, or mining face, and assess the initial level of the corresponding gas hazard. .

[0028] S2: Obtain the firmness coefficient f of coal seams, regions, or mining faces, and analyze the degree of influence of coal structure on gas hazard risk from the perspective of coal body resistance to gas hazard risk. ; S3: Obtain the burial depth of the coal seam, region, or mining face floor, and analyze the impact of coal seam burial depth on gas hazard risk. ; S4: Obtain the dip angle of the coal seam, region, or mining face, and analyze the impact of the coal seam dip angle on the risk of gas disasters. ; S5: Obtain the thickness of coal seams, regions, or mining faces, and analyze the impact of coal seam thickness on gas hazard risk. ; S6: Request , , , , The average value, comprehensive rating of gas disaster risk level This allows for a comprehensive assessment of the gas hazard risk level of coal seams, areas, or mining faces.

[0029] S1: Obtain the gas content (W) / pressure (P) of the coal seam, region, or mining face, and assess the initial level of its corresponding gas hazard risk; when season .

[0030] (1) In the formula Indicates the initial risk level of gas hazards in a coal seam, region, or mining face; These are the parameters for determining the initial risk level of gas disasters. The value is generally between 0.2 and 0.5. In this invention, for the convenience of classifying the five risk levels, it is set to 0.25. Generally, the value is between 2 and 5. In this invention, for the convenience of dividing the five risk levels, it is set to 2.5. Generally, the value is between 0 and 0.5. However, in this invention, for the convenience of dividing the five risk levels, it is set to 0. Indicates the gas content of a coal seam, region, or mining face, in m. 3 / t; This indicates the gas pressure in a coal seam, region, or mining face, expressed in MPa. Relationship between gas content and initial level of gas disaster Figure 1 As shown. The higher the gas content W / pressure P, the greater the gas disaster. In addition to using formula (1) to calculate the initial level of gas disaster in detail, the initial level of gas disaster can also be divided into five levels for convenient daily management and use. Therefore, the initial five levels of gas disaster risk can be divided according to the conditions in Table 1.

[0031] Table 1

[0032] S2: The firmness coefficient of coal seam, region, or working face. f From the perspective of coal seam resistance to gas hazard risk, this study analyzes the degree of influence of coal seam structure on gas hazard risk. ;when season .

[0033] Coal soundness coefficient f The strength coefficient of coal is an important standard for assessing the risk level of gas disasters. The smaller the strength coefficient of coal, the greater the risk of gas disasters. When encountering geological structures, the strength coefficient of coal will generally decrease.

[0034] (2) In the formula This indicates the degree of impact of the coal seam, region, or coal body structure at the mining face on the risk of gas disasters. Parameters indicating the degree of influence of coal seam structure on gas hazard risk. Generally, a value between 7 and 8 is used; however, for the convenience of classifying the five risk levels, this invention uses 7.3. Generally, the value is between -2 and -3. However, for the convenience of dividing the five risk levels, this invention uses -2.5. This indicates the firmness coefficient of coal seams, regions, or coal in mining faces. f value; f The degree of impact of the value on the risk of gas disasters, such as Figure 2 As shown.

[0035] For ease of daily management and application, the impact of coal seam firmness on gas hazard risk can be classified into five levels according to the conditions in Table 2: Table 2

[0036] S3: Obtain the burial depth of the coal seam, region, or mining face floor, and analyze the impact of coal seam burial depth on gas hazard risk. ;when season .

[0037] The burial depth of the coal seam, region, or mining face floor (hereinafter referred to as burial depth) is an important indicator of ground stress. The deeper the burial depth, the greater the ground stress and the greater the gas disaster.

[0038] (3) In the formula This indicates the degree of impact of the burial depth of the coal seam, region, or mining face on the risk of gas disasters. These are parameters representing the degree of influence of burial depth on gas disaster risk. The value is generally between 0.002 and 0.01. In this invention, for the convenience of classifying the five risk levels, it is set to 0.005. Generally, the value is between 0 and 1. However, in this invention, for the convenience of dividing the five risk levels, the value is set to 0. Indicates the depth of coal seams, regions, or mining faces, in meters (m). The impact of burial depth on the risk of gas disasters, such as Figure 3 As shown.

[0039] For ease of daily management and application, the impact of burial depth on gas hazard risk can be classified into five levels according to the conditions in Table 3: Table 3

[0040] S4: Obtain the dip angle of the coal seam, region, or mining face, and analyze the impact of the coal seam dip angle on the risk of gas disasters. ;when season .

[0041] The dip angle of a coal seam is key to the generation of self-weight stress in the coal body. The larger the dip angle, the greater the self-weight force and the worse the stability of the coal body.

[0042] (4) in, This indicates the risk level of the impact of coal seam burial depth on gas disasters; These are parameters representing the impact of coal seam dip angle on gas hazards. Generally, the value is between 2 and 5. However, in this invention, for the convenience of dividing the five risk levels, the value is 4. Generally, the value is between -3 and -10. However, for the convenience of dividing the five risk levels, this invention uses -8. Indicates the dip angle of a coal seam, region, or mining face, in degrees; The degree of influence of coal seam dip angle on gas disaster risk is as follows: Figure 4 As shown.

[0043] For ease of daily management and application, the impact of coal seam dip angle on gas hazard risk can be classified into five levels according to the conditions in Table 4: Table 4

[0044] S5: Obtain the thickness of coal seams, regions, or mining faces, and analyze the impact of coal seam thickness on gas hazard risk. ;when season .

[0045] (5) In the formula This indicates the risk level of the impact of coal seam thickness on gas disasters; These are parameters representing the impact of coal seam depth on gas hazards. Generally, the value is between 1 and 5. In this invention, for the convenience of dividing the five risk levels, the value is 3. Generally, the value is between -1 and -5. However, in this invention, for the convenience of dividing the five risk levels, the value is -3. Indicates the thickness of a coal seam, region, or mining face, in meters (m). The impact of coal seam thickness on gas disaster risk is as follows: Figure 5 As shown.

[0046] For ease of daily management and application, the impact of coal seam thickness on gas hazard risk can be classified into five levels according to the conditions in Table 5: Table 5

[0047] S6: Request , , , , The average value, comprehensive rating of gas disaster risk level To achieve a comprehensive assessment of the gas hazard level of coal seams, regions, or mining faces.

[0048] (6) For ease of daily management and application, the comprehensive assessment of gas hazard risk levels can be divided into five levels according to the conditions in Table 6: Table 6

[0049] The calculation, judgment and parameters of various degrees and levels of influence in this invention can be varied. The key is that the risk level of gas disaster needs to be comprehensively judged in conjunction with five major factors: gas content / pressure, coal body firmness coefficient, burial depth, coal seam dip angle and coal seam thickness.

[0050] Assume the geological and production parameters of a coal mine working face are as follows: 1. Obtain the parameters of the area to be evaluated: Gas content W =10m³ / t (or gas pressure) P =1.0MPa) Coal soundness coefficient f =0.4 Burial depth h =400m Coal seam dip angle α =30° Coal seam thickness H =3m 2. Assess the initial level of gas hazard. Y 1: Use formula Y 1=max{ a 1* W , b 1* P + c 1}, where a 1 = 0.25, b1 = 2.5, c 1=0 calculate: Y 1=max{0.25*10,2.5*1.0+0}=max{2.5,2.5}=2.5 if Y If 1 < 1, then let... Y 1 = 1; in this example Y 1 = 2.5, which meets the requirements.

[0051] 3. Analyze the degree of influence of coal seam structure on gas disaster risk. Y 2: Use formula ,in a 2 = 7.3, b 2 = -2.5 calculate: ≈2.68 if Y If 2 < 1, then let... Y 2 = 1; in this example Y 2≈2.68, which meets the requirements.

[0052] 4. Analyze the impact of coal seam depth on gas hazard risk. Y 3: Use formula ,in =0.005, =0 calculate: Y 3 = 0.005 * 400 + 0 = 2.0 if Y If 3 < 1, then let... Y 3 = 1; in this example Y 3 = 2.0, which meets the requirements.

[0053] 5. Analyze the impact of coal seam dip angle on gas hazard risk. Y 4: Use formula ,in a 4=4, b 4 = -8 calculate: ≈5.60 if Y If 4 < 1, then let... Y 4 = 1; in this example Y 4 ≈ 5.60, which meets the requirements.

[0054] 6. Analyze the impact of coal seam thickness on the risk of gas disasters. Y 5: Use formula ,ina 5=3, b 5 = -3 calculate: ≈max{0.2958,1.5}=1.5 if Y If 5 < 1, then let... Y 5 = 1; in this example Y 5 = 1.5, which meets the requirements.

[0055] 7. Determine the comprehensive risk rating of gas disasters. Y : Use formula

[0056] Calculate: Y = (2.5 + 2.68 + 2.0 + 5.60 + 1.5) / 5 ≈ 13.28 / 5 ≈ 2.656 8. Classify gas hazard risk levels: according to Y =2.656, belonging to level two risk: 2≤ Y <3 Corresponding emergency measures: Strengthen monitoring and local protection.

[0057] Finally, it should be noted that the above embodiments are only used to illustrate the technical solutions of the present invention and are not intended to limit it. Although the present invention has been described in detail with reference to preferred embodiments, those skilled in the art should understand that modifications or equivalent substitutions can be made to the technical solutions of the present invention without departing from the spirit and scope of the present invention, and all such modifications or substitutions should be covered within the scope of the claims of the present invention.

Claims

1. A comprehensive early warning method for emergency response to gas disaster risks, characterized in that: Includes the following steps: Obtain the gas content of the area to be evaluated W or gas pressure P Coal soundness coefficient f Burial depth h Coal seam dip angle α and coal seam thickness H ; Based on the gas content W or gas pressure P Assess the initial level of gas hazard Y 1; Based on the coal's soundness coefficient f Analyze the impact of coal seam structure on gas disaster risk. Y 2; Based on the burial depth h Analyzing the impact of coal seam depth on gas disaster risk Y 3; Based on the coal seam dip angle α Analyze the impact of coal seam dip angle on gas disaster risk. Y 4; Based on the coal seam thickness H Analyzing the impact of coal seam thickness on the risk of gas disasters Y 5; Regarding the Y 1. Y 2. Y 3. Y 4. Y 5. Calculate the average value to obtain the comprehensive gas disaster risk rating. Y To achieve a comprehensive assessment of the risk level of gas disasters; The initial level of the gas disaster Y The formula for calculating 1 is: in, These are the parameters for determining the initial risk level of a gas disaster; When calculated Y When 1 is less than 1, let Y 1 = 1.

2. The integrated early warning method for emergency response to gas disaster risks according to claim 1, characterized in that: The The value is 0.25; The value is 2.5; The value of is 0.

3. The integrated early warning method for emergency response to gas disaster risks according to claim 1, characterized in that: The degree of influence of the coal body structure on the risk of gas disasters The calculation formula is: in, Parameters indicating the degree of influence of coal seam structure on gas disaster risk; When calculated When less than 1, let =1.

4. The integrated early warning method for emergency response to gas disaster risks according to claim 3, characterized in that: The a The value of 2 is 7.3; the aforementioned b The value of 2 is -2.

5.

5. The integrated early warning method for emergency response to gas disaster risks according to claim 1, characterized in that: The impact of coal seam burial depth on gas disaster risk The calculation formula is: in, These are parameters representing the degree of influence of burial depth on the risk of gas disasters; When calculated When less than 1, let =1.

6. The integrated early warning method for emergency response to gas disaster risks according to claim 1, characterized in that: The degree of influence of coal seam dip angle on gas disaster risk The calculation formula is: in, These are parameters related to the impact of coal seam dip angle on gas hazards; When calculated When less than 1, let =1.

7. The integrated early warning method for emergency response to gas disaster risks according to claim 1, characterized in that: The degree of influence of coal seam thickness on gas disaster risk The calculation formula is: in, These are parameters related to the impact of coal seam depth on gas hazards; When calculated When less than 1, let =1.

8. The integrated early warning method for emergency response to gas disaster risks according to claim 1, characterized in that: The comprehensive risk rating of gas disaster Y The calculation formula is: ; It also includes the comprehensive risk rating of gas disasters. Y The value is used to classify the risk of gas disasters into five levels: When 1≤ Y When the value is less than 2, it is classified as Level 1; When 2≤ Y When the value is less than 3, it is classified as Level 2; When 3≤ Y When the temperature is below 4, it is level three; When 4≤ Y When the value is less than 5, it is level four; when Y A value of ≥5 indicates Level 5.

Images