Real-time early warning method for coal and gas outburst risk of driving face

Abstract

The invention discloses a real-time early warning method for coal and gas outburst danger of a driving face, which belongs to the technical field of mining engineering, and comprises the following steps: step S10: performing driving face division on an underground preset driving space in a manner of performing equal-proportion division on the basis of the area of the driving space, and acquiring gas parameters of each driving face; the gas parameters comprise gas pressure and gas content; s20, a risk threshold value is preset, historical gas parameters of the preset tunneling space are obtained, a database is generated, and change rules of the historical gas parameters in different season periods are analyzed in the database; the different season periods are a winter period and a summer period; 15-20 gas parameters which are closest to the risk threshold value in the history are collected in the winter period and the summer period at the same time. According to the invention, through real-time monitoring, data analysis and dynamic early warning, refined and intelligent management of the gas outburst risk is realized, so that management personnel are helped to take prevention measures in advance, and the outburst risk is reduced.

Description

Technical Field

[0001] The invention relates to the technical field of mining engineering, in particular to a real-time early warning method for coal and gas outburst dangers in a tunneling working face. Background Art

[0002] China has rich coal resources, but coal mine accidents are extremely serious. Among them, coal mine gas accidents are the biggest threat to my country's coal mine safety production. The use of scientific methods to achieve early warning of coal mine gas accidents is of great significance to preventing the occurrence of coal mine gas accidents. Coal and gas outburst is an abnormal dynamic phenomenon in which broken coal, rock and gas are suddenly thrown from the coal body or rock body into the mining space under the combined action of ground stress and gas pressure. It is an extremely serious natural disaster in the underground production process of coal mines and is extremely dangerous. This abnormal dynamic phenomenon is the result of the combined action of multiple factors, the main factors of which include geological structure factors, gas factors, ground stress factors, coal seam factors and mining technology factors.

[0003] In order to deal with abnormal dynamic phenomena, the application document with technical application number CN201811633864.1 provides a real-time monitoring and early warning system and method for coal and gas outbursts in mining working faces. The technical solution includes a ground central station, a control host, a network switch, a monitoring substation, a vibration pickup, a wind speed sensor, a methane concentration sensor and an audible and visual alarm; wherein, the sensor transmits the monitoring information to the monitoring substation, and the monitoring substation transmits the monitoring data to the ground central station through the network switch. The ground central station completes the early warning analysis through real-time processing of the monitoring data. Specifically, the risk of outburst is comprehensively judged based on the characteristic index of changes in microseismic events and the characteristic index of changes in gas outburst volume, and a fuzzy evaluation comprehensive early warning model for coal and gas outburst is established based on this to judge the danger level.

[0004] Another application document with technical application number CN202211140601.3 provides a coal and gas outburst early warning method for coal roadway excavation working face. This technical solution can gradually screen and identify coal and gas outburst risks, thereby improving the early warning of coal and gas risks to a certain extent and reducing disaster losses caused by inaccurate early warnings.

[0005] Although certain progress has been made in the early warning of coal and gas outbursts, there are still some shortcomings. In reality, when coal mining is carried out underground, when the coal mine is excavated in a fixed excavation space underground, if this excavation space is in a mining area with complex geological structure, the gas content and pressure distribution of the coal seam are uneven. In this case, the existing early warning methods cannot accurately reflect the danger of outbursts under such complex circumstances, and it is difficult to capture the rapid changes in gas concentration in time. It is difficult to coordinate and analyze the changes in gas concentration of different excavation faces in a fixed excavation space, which affects the comprehensiveness and accuracy of the early warning. Summary of the invention

[0006] In view of the above problems existing in the technical field of existing mining engineering, the present invention is proposed.

[0007] Therefore, one of the objects of the present invention is to provide a real-time early warning method for the danger of coal and gas outburst in an excavation working face, which realizes the refined and intelligent management of the danger of gas outburst through real-time monitoring, data analysis and dynamic early warning, so as to help managers take preventive measures in advance and reduce the risk of outburst.

[0008] In order to solve the above technical problems, the present invention provides the following technical solutions:

[0009] The present invention provides a real-time early warning method for coal and gas outburst danger in a tunneling working face, comprising the following steps:

[0010] Step S10: Dividing the preset underground excavation space into excavation faces, wherein the excavation face division method includes dividing the excavation space into equal proportions based on the excavation space area, and obtaining gas parameters of each excavation face; the gas parameters include gas pressure and gas content;

[0011] Step S20: Preset a risk threshold, obtain historical gas parameters of the preset excavation space, generate a database, and analyze the variation patterns of the historical gas parameters in different seasonal periods in the database; the different seasonal periods are winter and summer periods; at the same time, collect 15 to 20 gas parameters closest to the risk threshold in history in the winter and summer periods, mark the gas parameters as reference parameters, and sort the reference parameters by size;

[0012] Step S30: distinguishing the reference parameters based on the divided excavation faces, and marking the excavation faces based on the distinguished reference parameters; the marking method includes marking each excavation face as a high-risk excavation face, a medium-risk excavation face, and a low-risk excavation face, and presetting the high-risk excavation face and the medium-risk excavation face as key warning excavation faces;

[0013] Step S40: acquiring gas parameters in real time in the key warning excavation face, and comparing and analyzing the gas parameters with the reference parameters. If the gas parameters acquired in real time are the same as any of the reference parameters, an early warning of coal and gas outburst is issued; otherwise, no early warning is issued; and the reference parameter is marked as a determination parameter.

[0014] Step S50: When a coal and gas outburst warning is issued, a comparison and analysis is performed based on ten consecutive gas parameters obtained in real time and the reference parameters. If the change in the gas parameters does not exceed the judgment parameters, the coal and gas outburst warning is lifted, otherwise it is not lifted.

[0015] As a preferred solution of the present invention, wherein: based on the key warning excavation face, the change law of the reference parameters is analyzed, and based on the change law, the geological structure of the preset excavation space is analyzed, and the analysis method includes obtaining a set of characteristic data from the sorted reference parameters, the characteristic data includes at least 6 gas parameters, among the 6 gas parameters, every two gas parameters are a pair, and the difference between each pair of gas parameters and the risk threshold is calculated; and the geological structure is distinguished based on the 3 differences; including distinguishing the geological structure of the preset excavation space as a complex geological structure based on the pair of gas parameters with the smallest difference; marking the difference as a reference difference, when the difference between the gas parameter obtained in the preset excavation space in the future period and the risk threshold is the same as the reference difference, then the geological structure of the preset excavation space is determined to be a complex geological structure; the complex geological structure includes fault geological structure and / or fold geological structure.

[0016] As a preferred solution of the present invention, gas parameters are acquired based on the complex geological structure, and the regular characteristics of the gas parameters are analyzed. If the difference between the acquired gas parameters and the risk threshold is less than the reference difference, a coal and gas outburst warning is issued; otherwise, no warning is issued; when a coal and gas outburst warning is issued, the 10 gas parameters with the largest number of occurrences are acquired within an acquisition cycle, and the difference change between the gas parameters and the risk threshold is analyzed, and the coal mining volume is preset based on the difference change, and the correlation effect between the preset coal mining volume and the difference change is calculated, and the subsequent gas parameters are predicted; it is calculated according to the following formula:

[0017] Wherein, w represents the gas content;

[0018] In the formula, p orepresents the p-th coal mining volume obtained at the o-th time, t represents the mining time corresponding to the p-th coal mining volume, β represents the excavation length corresponding to the mining time, and k represents the difference calculated based on the p-th coal mining volume;

[0019] When the difference value changes in a decreasing trend with the increase of coal mining volume, it is determined that the gas content in this process is increasing and an early warning is issued; otherwise, no determination is made;

[0020] When it is determined that the gas content in this process is in an increasing state, the maximum increase value of the gas content in this process is recorded and stored, and the maximum increase value is marked as a reference value.

[0021] As a preferred solution of the present invention, the subsequent gas parameters are predicted, and the prediction method includes calculating the corresponding coal mining volume within the corresponding mining time, and predicting with at least 5 consecutive mining times as the prediction period. When the gas parameters within the period fluctuate but do not exceed the reference value, it is determined that the gas parameter changes are in a safe range; otherwise, no judgment is made, and an early warning of coal and gas outburst is issued.

[0022] As a preferred solution of the present invention, when it is determined that the gas parameter change is in a safe range, the time corresponding to the opening time is obtained, and the maximum gas parameter obtained in each time is used to generate a data set [θ1, θ2, θ3, ..., θ n ]; wherein n represents the nth gas parameter, and the coal mining volume within the corresponding time period is collected based on the gas parameter; when the coal mining volume obtained in the future time period within the corresponding time period, if the gas parameter corresponding to this coal mining volume is greater than the previous gas parameter, it is determined that the gas parameter change is in an increasing trend within the safety range, and an early warning of coal and gas outburst is issued; otherwise, no determination is made.

[0023] As a preferred solution of the present invention, the gas parameter with the largest value in the data set is collected, the coal mining volume corresponding to the gas parameter is obtained, and the coal mining volume is marked as the reference mining volume; if the coal mining volume obtained in the future time period is less than the reference mining volume, but the gas parameter corresponding to this coal mining volume is greater than the maximum gas parameter collected in the data set, it is determined that when the reference mining volume is reached, the gas parameter will exceed the risk threshold, and an early warning of coal and gas outburst is issued; otherwise, no determination is made.

[0024] As a preferred solution of the present invention, when the corresponding gas parameter is greater than the maximum gas parameter collected in the data set, the time required to reach the reference mining volume is calculated, the total number of gas parameters obtained within the time is counted, and the change characteristics of the gas parameters are analyzed in the total number, and a critical threshold is preset, and the difference change between each gas parameter is calculated based on the critical threshold, and the regular characteristics of the excavation length of coal mining and the difference change are calculated based on the difference change, and the calculation is obtained according to the following formula:

[0025] Among them, m x represents the mth excavation length obtained at the xth second;

[0026] Where, λ represents the gas parameter corresponding to the excavation length, δ i represents the δth minimum gas parameter obtained in the i-th continuous statistical excavation length, γ i represents the γth maximum gas parameter obtained in the i-th consecutive statistical excavation length;

[0027] In the longest excavation length corresponding to the xth second, if the difference corresponding to the excavation length does not exceed the critical threshold, it is determined that the gas parameter change is in a stable state and the coal and gas outburst warning is lifted; otherwise, no determination is made.

[0028] As a preferred solution of the present invention, among the total number of gas parameters counted within the time period, the largest 6 to 10 gas parameters are obtained, and the total excavation length corresponding to the total number is obtained. When the total number of gas parameters obtained outside the total excavation length in the future time period, if the maximum gas parameters in the total number are all smaller than the previously mentioned maximum 6 to 10 gas parameters, it is determined that the geological structure corresponding to the excavation length has deviated from the complex geological structure.

[0029] A terminal includes a processor, an input interface, an output interface and a memory, wherein the processor, input interface, output interface and memory are interconnected, wherein the memory is used to store a computer program, and the computer program includes program instructions. The processor is configured to call the program instructions to execute the real-time early warning method for coal and gas outburst hazards in an excavation working face.

[0030] A computer-readable storage medium stores a computer program, wherein the computer program includes program instructions. When the program instructions are executed by a processor, the processor executes the method for real-time early warning of coal and gas outburst hazards in an excavation working face.

[0031] 1. By obtaining gas parameters in real time at the key warning excavation face and comparing and analyzing them with historical reference parameters, abnormal changes in gas concentration can be discovered in a timely manner;

[0032] 2. Divide the excavation faces into high-risk, medium-risk and low-risk excavation faces, and conduct key monitoring and early warning on high-risk and medium-risk excavation faces, thereby improving the pertinence and effectiveness of risk management and control;

[0033] 3. By analyzing the changing patterns of gas parameters and combining geological structural features (such as faults, folds, etc.), it is possible to more accurately identify complex geological structural areas, take preventive measures in advance, and reduce the risk of outbursts;

[0034] 4. Utilize historical gas parameter data to analyze the changing patterns in different seasons, provide a scientific basis for the early warning model, and improve the accuracy and reliability of early warning; and predict the subsequent changing trends of gas parameters to help managers predict gas risks in advance;

[0035] 5. By analyzing the correlation between coal mining volume and gas parameters, the mining speed and intensity can be reasonably controlled, thereby optimizing the schedule of excavation operations and ensuring excavation safety in areas with complex geological structures. BRIEF DESCRIPTION OF THE DRAWINGS

[0036] In order to more clearly illustrate the technical solutions of the embodiments of the present invention, the following briefly introduces the drawings required for describing the embodiments. Obviously, the drawings described below are only some embodiments of the present invention. For ordinary technicians in this field, other drawings can be obtained based on these drawings without creative labor. Among them:

[0037] Figure 1 A schematic diagram of a method flow chart of an embodiment of the present invention;

[0038] Figure 2 It is a schematic diagram of the process structure of an embodiment of the present invention. DETAILED DESCRIPTION

[0039] In order to make the purpose, technical solution and advantages of the embodiment of the present invention clearer, the technical solution of the embodiment of the present invention will be clearly and completely described below in conjunction with the drawings of the embodiment of the present invention. Obviously, the described embodiment is a part of the embodiment of the present invention, not all of the embodiments. Based on the described embodiment of the present invention, all other embodiments obtained by ordinary technicians in this field belong to the scope of protection of the present invention.

[0040] When coal mining is carried out underground, when the coal mine is excavated in a fixed excavation space underground, if this excavation space is located in a mining area with complex geological structure, the gas content and pressure distribution of the coal seam are uneven. In this case, the existing early warning methods cannot accurately reflect the outstanding dangers under such complex circumstances, and it is difficult to capture the rapid changes in gas concentration in time. It is difficult to coordinate and analyze the changes in gas concentration of different excavation faces in a fixed excavation space, which affects the comprehensiveness and accuracy of the early warning.

[0041] Based on this, the present invention proposes a real-time early warning method for the danger of coal and gas outburst in the excavation working face. Through real-time monitoring, data analysis and dynamic early warning, it realizes the refined and intelligent management of the danger of gas outburst, so as to help managers take preventive measures in advance and reduce the risk of outburst.

[0042] The present invention is further described in detail below through embodiments and in conjunction with the accompanying drawings.

[0043] Reference Figure 1 to Figure 2 , is an embodiment of the present invention, which provides a real-time early warning method for coal and gas outburst danger in a tunneling working face, comprising the following steps:

[0044] Step S10: Divide the preset underground excavation space into excavation faces, wherein the excavation face division method includes dividing the excavation space into equal proportions based on the excavation space area, and obtaining gas parameters of each excavation face; the gas parameters include gas pressure and gas content;

[0045] In this embodiment, the preset underground excavation space is reasonably divided into excavation faces. Based on the excavation space area, the excavation space is divided into multiple relatively independent excavation faces in an equal proportion. The gas parameters of each excavation face are independently obtained, laying a foundation for subsequent risk assessment and early warning.

[0046] Step S20: Preset a risk threshold, obtain historical gas parameters of a preset excavation space, generate a database, and analyze the changing rules of historical gas parameters in different seasonal periods in the database; the different seasonal periods are winter periods and summer periods; at the same time, collect 15 to 20 gas parameters closest to the risk threshold in history in the winter period and the summer period, mark the gas parameters as reference parameters, and sort the reference parameters by size;

[0047] In this embodiment, the risk threshold is the basis for judging the danger of gas outburst. At the same time, the historical gas parameters of the preset excavation space are collected, a detailed database is established, and the changing rules of the historical gas parameters in different seasonal periods (winter period and summer period) are deeply analyzed to explore the influence of seasonal factors on the gas parameters. From the winter and summer periods, 15 to 20 gas parameters closest to the risk threshold are collected respectively, and these key parameters are marked as reference parameters and sorted by size for subsequent comparison and analysis;

[0048] It should be noted in this embodiment that, according to the experience of coal mining, seasonal meteorological conditions have an impact on the change of gas content. In winter, the atmospheric pressure is usually higher, and the change of atmospheric pressure on the ground will be transmitted to the underground through the wellhead, resulting in a relatively reduced amount of gas outflow in the underground. In summer, the atmospheric pressure is lower, the ventilation resistance is relatively small, and gas is more likely to flow out of the coal seam, resulting in a relatively high gas concentration. For example, during the summer ventilation period, the gas concentration is about 0.08% higher than in other seasons.

[0049] Step S30: distinguishing the reference parameters based on the divided excavation faces, and marking the excavation faces based on the distinguished reference parameters; the marking method includes marking each excavation face as a high-risk excavation face, a medium-risk excavation face, and a low-risk excavation face, and presetting the high-risk excavation face and the medium-risk excavation face as key warning excavation faces;

[0050] In this embodiment, based on the divided excavation faces and in combination with the reference parameters obtained in step S20, the risk level of each excavation face is differentiated, which can clarify the monitoring focus and concentrate resources to carry out real-time monitoring and early warning of these high-risk areas;

[0051] Step S40: acquiring gas parameters in real time in the key warning excavation face, and comparing and analyzing the gas parameters with reference parameters. If the gas parameters acquired in real time are the same as any reference parameter, a coal and gas outburst condition warning is issued; otherwise, no warning is issued; and the reference parameter is marked as a determination parameter.

[0052] In this embodiment, in the key warning excavation face, gas parameters are obtained in real time to ensure the timeliness and accuracy of the data. The real-time gas parameters are accurately compared and analyzed with the reference parameters. If the real-time gas parameters are the same as any reference parameters, a coal and gas outburst warning signal is immediately issued to remind on-site personnel to take emergency measures. At the same time, the reference parameters are marked as judgment parameters for further analysis and judgment.

[0053] Specifically, the present embodiment analyzes the variation law of the reference parameters based on the key warning tunneling face, and analyzes the geological structure of the preset tunneling space based on the variation law. The analysis method includes obtaining a set of characteristic data from the sorted reference parameters, the characteristic data includes at least 6 gas parameters, and among the 6 gas parameters, each two gas parameters are a pair, and the difference between each pair of gas parameters and the risk threshold is calculated; and the geological structure is distinguished based on the three differences; including distinguishing the geological structure of the preset tunneling space as a complex geological structure based on the pair of gas parameters with the smallest difference; marking the difference as a reference difference, when the difference between the gas parameter obtained in the preset tunneling space in the future period and the risk threshold is the same as the reference difference, then the geological structure of the preset tunneling space is determined to be a complex geological structure; the complex geological structure includes a fault geological structure and / or a fold geological structure;

[0054] In reality, areas with complex geological structures (such as faults, folds, etc.) usually have higher gas content. Therefore, it is of practical significance to determine whether it is a complex geological structure based on this reality.

[0055] On the basis of the above, this embodiment acquires gas parameters based on complex geological structures, analyzes the regular characteristics of gas parameters, and issues a coal and gas outburst warning if the difference between the acquired gas parameters and the risk threshold is less than the reference difference; otherwise, no warning is issued; when an early warning of coal and gas outburst is issued, the 10 gas parameters with the highest number of occurrences are acquired within one acquisition cycle, the difference change between the gas parameters and the risk threshold is analyzed, and the coal mining volume is preset based on the difference change, the correlation effect between the preset coal mining volume and the difference change is calculated, and the subsequent gas parameters are predicted; the calculation is based on the following formula:

[0056] Wherein, w represents the gas content;

[0057] In the formula, p o represents the p-th coal mining volume obtained at the o-th time, t represents the mining time corresponding to the p-th coal mining volume, β represents the excavation length corresponding to the mining time, and k represents the difference calculated based on the p-th coal mining volume;

[0058] When the difference value decreases with the increase of coal mining volume, it is judged that the gas content in this process is increasing and an early warning is issued; otherwise, no judgment is made;

[0059] When it is determined that the gas content is increasing during this process, the maximum increase in the gas content during this process is recorded and stored, and the maximum increase is marked as a reference value;

[0060] It should be noted that in this embodiment, one acquisition cycle includes 20 seconds;

[0061] Step S50: When a coal and gas outburst warning is issued, a comparison analysis is performed based on ten consecutive gas parameters obtained in real time and the reference parameters. If the change of the gas parameters does not exceed the judgment parameters, the coal and gas outburst warning is cancelled, otherwise, it is not cancelled;

[0062] Furthermore, in predicting the subsequent gas parameters, the prediction method includes calculating the corresponding coal mining volume within the corresponding mining hours, and predicting with at least 5 consecutive mining hours as the prediction cycle. When the gas parameters in the cycle fluctuate but do not exceed the reference value, it is determined that the gas parameter changes are in a safe range; otherwise, it is not determined, and an early warning of coal and gas outburst is issued;

[0063] On the basis of the above, when it is determined that the gas parameter change is in a safe range, the duration corresponding to the start of the operation is obtained, and the maximum gas parameters obtained in each duration are used to generate a data set [θ1, θ2, θ3, ...., θ n ]; where n represents the nth gas parameter, and the coal mining volume within the corresponding time period is collected based on the gas parameter; when the coal mining volume obtained in the future period within the corresponding time period, if the gas parameter corresponding to this coal mining volume is greater than the previous gas parameter, it is determined that the gas parameter change is in an increasing trend within the safe range, and a coal and gas outburst warning is issued; otherwise, no determination is made;

[0064] It should be emphasized in this embodiment that the gas parameter with the largest value is collected in the data set, the coal mining volume corresponding to the gas parameter is obtained, and the coal mining volume is marked as the reference mining volume; if the coal mining volume obtained in the future period is less than the reference mining volume, but the gas parameter corresponding to this coal mining volume is greater than the maximum gas parameter collected in the data set, it is determined that when the reference mining volume is reached, the gas parameter will exceed the risk threshold, and a coal and gas outburst warning is issued; otherwise, no determination is made;

[0065] On the basis of the above, further, when the corresponding gas parameter is greater than the maximum gas parameter collected in the data set, the time required to reach the reference mining volume is calculated, the total number of gas parameters obtained within the time is counted, and the change characteristics of the gas parameters are analyzed in the total number. At the same time, a critical threshold is preset, and the difference change between each gas parameter is calculated based on the critical threshold. The regular characteristics of the excavation length and difference change of coal mining are calculated based on the difference change, and the calculation is obtained according to the following formula:

[0066] Among them, m x represents the mth excavation length obtained at the xth second;

[0067] In the formula, λ represents the gas parameter corresponding to the excavation length, δ irepresents the δth minimum gas parameter obtained in the i-th continuous statistical excavation length, γ i represents the γth maximum gas parameter obtained in the i-th consecutive statistical excavation length;

[0068] In the longest excavation length corresponding to the xth second, if the difference corresponding to the excavation length does not exceed the critical threshold, it is determined that the gas parameter change is in a stable state, and the coal and gas outburst warning is lifted; otherwise, no determination is made;

[0069] Among them, among the total number of gas parameters counted within the time, the largest 6 to 10 gas parameters are obtained, and the total excavation length corresponding to the total number is obtained. When the total number of gas parameters obtained outside the total excavation length in the future time period, if the maximum gas parameters in the total number are all smaller than the previous largest 6 to 10 gas parameters, it is determined that the geological structure corresponding to the excavation length has deviated from the complex geological structure.

[0070] A terminal includes a processor, an input interface, an output interface and a memory, wherein the processor, input interface, output interface and memory are interconnected, wherein the memory is used to store a computer program, and the computer program includes program instructions. The processor is configured to call the program instructions to execute the real-time early warning method for coal and gas outburst hazards in an excavation working face.

[0071] A computer-readable storage medium stores a computer program, wherein the computer program includes program instructions. When the program instructions are executed by a processor, the processor executes the method for real-time early warning of coal and gas outburst hazards in an excavation working face.

[0072] To sum up, the present invention divides the excavation face into high-risk, medium-risk and low-risk excavation faces, and focuses on monitoring and early warning of high-risk and medium-risk excavation faces, thereby improving the pertinence and effectiveness of risk management. At the same time, gas parameters are obtained in real time at the key early-warning excavation face, and compared and analyzed with historical reference parameters, so as to timely discover abnormal changes in gas concentration and help managers predict gas risks in advance.

[0073] It should be noted that the above embodiments are only used to illustrate the technical solutions 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 solutions of the present invention may be modified or replaced by equivalents without departing from the spirit and scope of the technical solutions of the present invention, which should all be included in the scope of the claims of the present invention.

Claims

1. A real-time early warning method for coal and gas outburst danger in a tunneling working face, characterized in that: The following steps are involved: Dividing the preset underground excavation space into excavation faces, wherein the excavation face division method includes dividing the excavation space into equal proportions based on the excavation space area, and obtaining gas parameters of each excavation face; the gas parameters include gas pressure and gas content; Preset a risk threshold, obtain historical gas parameters of the preset excavation space, generate a database, and analyze the changing rules of the historical gas parameters in different seasonal periods in the database; the different seasonal periods are winter and summer periods; at the same time, collect 15 to 20 gas parameters closest to the risk threshold in history in the winter and summer periods, mark the gas parameters as reference parameters, and sort the reference parameters by size; The divided excavation surfaces are differentiated according to the reference parameters, and the excavation surfaces are marked based on the differentiated reference parameters; The marking method includes marking each excavation face as a high-risk excavation face, a medium-risk excavation face and a low-risk excavation face, and presetting the high-risk excavation face and the medium-risk excavation face as key warning excavation faces; The gas parameters are obtained in real time in the key warning excavation face, and the gas parameters are compared and analyzed with the reference parameters. If the gas parameters obtained in real time are the same as any of the reference parameters, a coal and gas outburst condition warning is issued; Otherwise, no warning is given; at the same time, the reference parameter is marked as a determination parameter; When a coal and gas outburst warning is issued, a comparison and analysis is performed based on ten consecutive gas parameters acquired in real time and the reference parameters. If the change in the gas parameters does not exceed the judgment parameters, the coal and gas outburst warning is lifted, otherwise it is not lifted.

2. A method for real-time early warning of coal and gas outburst danger in a tunneling working face according to claim 1, characterized in that: Analyzing the variation law of the reference parameters based on the key warning excavation face, and analyzing the geological structure of the preset excavation space based on the variation law, wherein the analysis method includes obtaining a set of characteristic data from the sorted reference parameters, wherein the characteristic data includes at least 6 gas parameters, and calculating the difference between each pair of gas parameters and the risk threshold value, taking every two gas parameters as a pair among the 6 gas parameters; and distinguishing geological structures based on the three differences; The method includes classifying the geological structure of the preset excavation space as a complex geological structure based on the pair of gas parameters with the smallest difference; The difference is marked as a reference difference. When the difference between the gas parameters obtained in the preset excavation space in the future period and the risk threshold is the same as the reference difference, the geological structure of the preset excavation space is determined to be a complex geological structure; the complex geological structure includes a fault geological structure and / or a fold geological structure.

3. A real-time early warning method for coal and gas outburst danger in a tunneling working face as claimed in claim 2, characterized in that: Acquire gas parameters based on the complex geological structure, analyze the regular characteristics of the gas parameters, and issue a coal and gas outburst warning if the difference between the acquired gas parameters and the risk threshold is less than the reference difference; Otherwise, no warning is issued; when a coal and gas outburst warning is issued, the 10 gas parameters with the highest number of occurrences are collected within one acquisition cycle, the difference between the gas parameter and the risk threshold is analyzed, and the coal mining volume is preset based on the difference change, the correlation effect between the preset coal mining volume and the difference change is calculated, and the subsequent gas parameters are predicted; calculated according to the following formula: Wherein, w represents the gas content; In the formula, p o represents the p-th coal mining volume obtained at the o-th time, t represents the mining time corresponding to the p-th coal mining volume, β represents the excavation length corresponding to the mining time, and k represents the difference calculated based on the p-th coal mining volume; When the difference value changes in a decreasing trend with the increase of coal mining volume, it is determined that the gas content in this process is increasing and an early warning is issued; otherwise, no determination is made; When it is determined that the gas content in this process is in an increasing state, the maximum increase value of the gas content in this process is recorded and stored, and the maximum increase value is marked as a reference value.

4. A method for real-time early warning of coal and gas outburst danger in a tunneling working face as claimed in claim 3, characterized in that: Predicting subsequent gas parameters, the prediction method includes calculating the corresponding coal mining volume within the corresponding mining hours, and predicting with at least 5 consecutive mining hours as the prediction cycle, when the gas parameters within the cycle fluctuate but do not exceed the reference value, it is determined that the gas parameter change is in a safe range; Otherwise, no judgment will be made and an early warning of coal and gas outburst will be issued.

5. A real-time early warning method for coal and gas outburst danger in a tunneling working face as claimed in claim 4, characterized in that: When it is determined that the gas parameter change is in a safe range, the time corresponding to the start of the operation is obtained, and the maximum gas parameter obtained in each time is used to generate a data set [θ1, θ2, θ3, ..., θ n ]; wherein n represents the nth gas parameter, and the coal mining volume within the corresponding time period is collected based on the gas parameter; when the coal mining volume obtained in the future time period within the corresponding time period, if the gas parameter corresponding to this coal mining volume is greater than the previous gas parameter, it is determined that the gas parameter change is in an increasing trend within the safety range, and an early warning of coal and gas outburst is issued; otherwise, no determination is made.

6. A method for real-time early warning of coal and gas outburst danger in a tunneling working face as claimed in claim 5, characterized in that: The gas parameter with the largest value in the data set is collected, the coal mining volume corresponding to the gas parameter is obtained, and the coal mining volume is marked as the reference mining volume; if the coal mining volume obtained in the future period is less than the reference mining volume, but the gas parameter corresponding to this coal mining volume is greater than the maximum gas parameter collected in the data set, it is determined that when the reference mining volume is reached, the gas parameter will exceed the risk threshold, and an early warning of coal and gas outburst is issued; Otherwise, no judgment is made.

7. A method for real-time early warning of coal and gas outburst danger in a tunneling working face as claimed in claim 6, characterized in that: When the corresponding gas parameter is greater than the maximum gas parameter collected in the data set, the time required to reach the reference mining volume is calculated, the total number of gas parameters obtained within the time is counted, and the change characteristics of the gas parameters are analyzed in the total number. At the same time, a critical threshold is preset, and the difference change between each gas parameter is calculated based on the critical threshold. Based on the difference change, the regular characteristics of the excavation length of coal mining and the difference change are calculated, and the calculation is obtained according to the following formula: Among them, m x represents the mth excavation length obtained at the xth second; Where, λ represents the gas parameter corresponding to the excavation length, δ i represents the δth minimum gas parameter obtained in the i-th continuous statistical excavation length, γ i represents the γth maximum gas parameter obtained in the i-th consecutive statistical excavation length; In the longest excavation length corresponding to the xth second, if the difference corresponding to the excavation length does not exceed the critical threshold, it is determined that the gas parameter change is in a stable state and the coal and gas outburst warning is lifted; otherwise, no determination is made.

8. A method for real-time early warning of coal and gas outburst danger in a tunneling working face as claimed in claim 7, characterized in that: Among the total number of gas parameters counted within the time period, the largest 6 to 10 gas parameters are obtained, and the total excavation length corresponding to the total number is obtained. When the total number of gas parameters obtained outside the total excavation length in the future time period, if the maximum gas parameters in the total number are all smaller than the previously mentioned largest 6 to 10 gas parameters, it is determined that the geological structure corresponding to the excavation length has deviated from the complex geological structure.

9. A terminal, characterized in that: The method comprises a processor, an input interface, an output interface and a memory, wherein the processor, the input interface, the output interface and the memory are interconnected, wherein the memory is used to store a computer program, the computer program comprises program instructions, and the processor is configured to call the program instructions to execute the method according to any one of claims 1 to 8.

10. A computer-readable storage medium, characterized in that: The computer-readable storage medium stores a computer program, wherein the computer program includes program instructions. When the program instructions are executed by a processor, the processor is enabled to execute the method according to any one of claims 1 to 8.

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