Comprehensive prevention and control method and device for coal bunker in multi-disaster coupling environment and medium of comprehensive prevention and control method

Abstract

The invention relates to the technical field of coal bunker safety, in particular to a comprehensive prevention and control method and device for a coal bunker in a multi-disaster coupling environment and a medium of the comprehensive prevention and control method. The method comprises the following steps: determining a migration rule of multiphase flow in a coal bunker in a normal state; sensing data monitored by the comprehensive management and control platform in real time are obtained, and the possibility of initial disasters including gas explosion, dust explosion and coal spontaneous combustion is judged in combination with the migration law of the multiphase flow; according to the possibility of initial disaster occurrence, the possibility of multi-disaster coupling occurrence is judged; sensing data monitored in real time are obtained, a multi-disaster comprehensive management and control strategy in the coal bunker is formulated according to the possibility of multi-disaster coupling occurrence, and the possibility of coal spontaneous combustion, gas explosion or dust explosion is reduced. According to the comprehensive prevention and control method for the coal bunker in the multi-disaster coupling environment, the possibility of occurrence of multiple disasters can be judged globally and integrally, comprehensive prevention and control of the disasters in the coal bunker are achieved, and the prevention and control effect is good.

Description

Technical Field

[0001] The present invention relates to the field of coal bunker safety technology, and in particular to a comprehensive prevention and control method, equipment and medium thereof in a coal bunker multi-disaster coupling environment. Background Art

[0002] In the process of coal mining, the safety management of coal bunkers has always been a matter of great concern. There are many safety hazards in coal bunkers, including spontaneous combustion, gas accumulation, dust explosion and other disasters. In recent years, scholars and engineers at home and abroad have made significant progress in the research of coal bunker hazards, and have proposed or developed a series of effective solutions, equipment or technical methods for various single safety issues. For example, in response to the problem of spontaneous combustion in coal bunkers, researchers have developed a variety of fire monitoring and early warning systems; for the prevention and control of gas and dust, many advanced extraction and dust removal technologies have also emerged. The application of these technologies has undoubtedly improved the ability of coal bunkers to deal with single safety issues. However, there are still obvious deficiencies in current research and practice, and it is difficult to comprehensively deal with the multiple safety risks that coal bunkers may face, and there is a lack of a global and holistic solution. Therefore, it is urgent to develop a comprehensive prevention and control method to fundamentally improve the overall safety level of coal bunkers. Summary of the invention

[0003] The technical problem to be solved by the present invention is: in order to solve the technical problem that the coal bunker disaster prevention and control methods in the prior art only start from a single perspective, lack comprehensiveness and systematicness, and result in poor underground safety, the present invention provides a comprehensive prevention and control method under a coal bunker multi-disaster coupling environment, which can determine the possibility of multiple disasters from a global and overall perspective, and realize comprehensive prevention and control of disasters in the coal bunker, with good prevention and control effect.

[0004] The technical solution adopted by the present invention to solve the technical problem is: a comprehensive prevention and control method under a multi-disaster coupling environment of a coal bunker, the method comprising the following steps:

[0005] S1, determine the migration law of multiphase flow in the coal bunker under normal conditions;

[0006] S2, obtaining sensor data monitored in real time by the integrated management and control platform, and judging the possibility of the occurrence of initial disasters in combination with the migration law of the multiphase flow, wherein the initial disasters include gas explosion, dust explosion and coal spontaneous combustion;

[0007] S3, judging the possibility of multi-hazard coupling based on the possibility of the initial disaster;

[0008] S4, obtain real-time monitoring sensor data, and formulate a comprehensive multi-disaster control strategy in the coal bunker according to the possibility of multi-disaster coupling;

[0009] Among them, the comprehensive management and control strategy for multiple disasters in coal bunkers includes:

[0010] When it is detected that the gas concentration is too high and causes the coal spontaneous combustion disaster or the dust concentration is too high and causes the coal spontaneous combustion disaster, the operation time and wind speed of the ventilator are controlled to reduce the possibility of coal spontaneous combustion;

[0011] When it is detected that coal spontaneous combustion may cause a gas explosion or a dust explosion, the high-temperature fire source point is controlled within the maximum fire-fighting time to reduce the possibility of a gas explosion or a dust explosion.

[0012] Further, specifically, in the step S1, the multiphase flow includes gas, dust and wind flow velocity in the coal bunker;

[0013] The migration equation of gas in the coal bunker is expressed as:

[0014]

[0015] in, is the rate of change of gas concentration over time, C gas is the real-time monitored gas concentration, D gas is the diffusion coefficient of gas, is the wind velocity vector, S is the source term of gas, which indicates the amount of gas generated or disappeared in a unit volume per unit time. is the Laplace operator, which represents the second-order derivative in space;

[0016] The dust migration equation in the coal bunker is expressed as:

[0017]

[0018] in, is the rate of change of dust concentration over time, C dust To monitor dust concentration in real time, D dust is the diffusion coefficient of dust, k is the sedimentation coefficient of dust, which indicates the proportion of dust particles settling due to gravity and other factors in unit time, S dust is the source term of dust;

[0019] The transport equation of the wind flow velocity is expressed as:

[0020]

[0021] Among them, C comb is the concentration of the gas produced by spontaneous combustion, D comb is the diffusion coefficient of the corresponding gas, S comb is the gas source term produced by the autoignition reaction.

[0022] Further, specifically, in step S2, determining the possibility of the initial disaster occurring includes the following steps:

[0023] S21, constructing an initial disaster occurrence model, wherein the initial disaster occurrence model includes a gas explosion occurrence model, a dust explosion occurrence model, and a coal spontaneous combustion occurrence model;

[0024] S22, real-time monitoring of sensor data on the integrated management and control platform;

[0025] S22, calculate the average wind speed u in the coal bunker avg ;

[0026] S23, determining a possible initial disaster according to the average wind speed in the coal bunker and various sensor data in combination with the constructed initial disaster model;

[0027] The sensor data include gas concentration, dust concentration, gas concentration generated after spontaneous combustion of coal, oxygen concentration in the coal bunker and temperature in the coal bunker.

[0028] Further, specifically, in the step S21, the gas explosion occurrence model Pgas is expressed as:

[0029]

[0030] Among them, C gas,crit is the critical concentration of gas explosion, S gas is the intensity of the gas source, V coal is the total volume of coal in the coal bunker;

[0031] The dust explosion occurrence model P dust It is expressed as:

[0032]

[0033] Among them, C dust,LEL It is the lower limit concentration of dust explosion;

[0034] The coal spontaneous combustion model P comb It is expressed as:

[0035]

[0036] Among them, C comb,crit is the critical concentration of spontaneous combustion gas; I spont is the spontaneous combustion tendency index of coal; T t is the real-time temperature in the coal bunker; T0 is the reference temperature of the coal bunker; ΔT is the reference range of temperature increase; It is the oxygen concentration monitored in real time; It is the critical concentration of oxygen to support combustion.

[0037] Further, specifically, judging the possibility of multi-hazard coupling includes:

[0038] When the gas or dust concentration is too high, if the ventilator is started to increase the air flow speed, the possibility of promoting coal spontaneous combustion can be determined by the calculation formula:

[0039]

[0040] Among them, I spont,promote is the coal spontaneous combustion promotion index, u vent is the air velocity of the fan, H coal is the stacking height of coal in the coal bunker, u max is the maximum value of wind speed; H max is the maximum coal position in the coal bunker, T is the accumulation time of coal in the bunker, T min It is the shortest spontaneous combustion period of coal;

[0041] Or when coal spontaneous combustion occurs, the possibility of gas or dust explosion is calculated as follows:

[0042]

[0043] Among them, Q spont is the heat generated by spontaneous combustion of coal, Q ign is the ignition energy threshold of gas or dust, C ex is the current gas or dust concentration, C ex The lower explosion limit concentration C LEL The ratio reflects the potential danger of explosion.

[0044] Further, specifically, in step S4, the calculation formula of the running time and wind speed of the ventilator includes:

[0045] The initial gas concentration or dust is C0, the concentration after time t is C(t), and the ventilation efficiency coefficient is λ. The formula for the change of concentration over time can be expressed as: C(t) = C0e -λt ;

[0046] In order to reduce the concentration to a safe threshold C safe The following equation is solved to obtain: C safe =C0e -λt ;

[0047] The calculation formula of the fan running time t is:

[0048] Calculate the fan speed based on the fan operating time:

[0049] Further, specifically, the limit fire extinguishing time calculation formula includes:

[0050]

[0051] Among them, T 起始 is the starting temperature of coal spontaneous combustion, T 临界 is the critical temperature of spontaneous combustion, and r is the rate of temperature drop after the fire extinguishing system is activated.

[0052] A computer device comprising:

[0053] processor;

[0054] A memory for storing executable instructions;

[0055] Among them, the processor is used to read the executable instructions from the memory and execute the executable instructions to implement the comprehensive prevention and control method in the multi-disaster coupling environment of the coal bunker as described above.

[0056] A computer-readable storage medium stores a computer program. When the computer program is executed by a processor, the processor implements the comprehensive prevention and control method in a multi-disaster coupling environment of a coal bunker as described above.

[0057] The beneficial effect of the present invention is that the comprehensive prevention and control method under the multi-disaster coupling environment of the coal bunker of the present invention, through the sensor data monitored in real time by the comprehensive management and control platform, and the processing of the sensor data, can not only effectively deal with a single disaster, but also determine the possibility of multiple disasters from a global and overall perspective, thereby realizing comprehensive prevention and control of disasters in the coal bunker with good prevention and control effect, providing new ideas and methods for the safety management of the coal bunker, reducing the occurrence of coal bunker accidents, and ensuring the life safety of miners. BRIEF DESCRIPTION OF THE DRAWINGS

[0058] The present invention is further described below in conjunction with the accompanying drawings and embodiments.

[0059] Figure 1 It is a schematic diagram of the method flow of embodiment 1 of the present invention.

[0060] Figure 2 It is a schematic diagram of the device structure of the second embodiment of the present invention.

[0061] In the figure, 10 is a computer device; 1002 is a processor; 1004 is a memory; and 1006 is a transmission device. DETAILED DESCRIPTION

[0062] The present invention will now be described in further detail with reference to the accompanying drawings. These drawings are simplified schematic diagrams, which only illustrate the basic structure of the present invention in a schematic manner, and therefore only show the components related to the present invention.

[0063] In the description of the present invention, it should be understood that the terms "center", "longitudinal", "lateral", "length", "width", "thickness", "up", "down", "front", "back", "left", "right", "vertical", "horizontal", "top", "bottom", "inside", "outside", "clockwise", "counterclockwise", "axial", "radial", "circumferential" and the like indicate positions or positional relationships based on the positions or positional relationships shown in the accompanying drawings, and are only for the convenience of describing the present invention and simplifying the description, rather than indicating or implying that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore cannot be understood as a limitation on the present invention. In addition, features defined as "first" and "second" may explicitly or implicitly include one or more of the features. In the description of the present invention, unless otherwise specified, "multiple" means two or more.

[0064] In the description of the present invention, it should be noted that, unless otherwise clearly specified and limited, the terms "installed", "connected", and "connected" should be understood in a broad sense, for example, it can be a fixed connection, a detachable connection, or an integral connection; it can be a mechanical connection or an electrical connection; it can be a direct connection, or it can be indirectly connected through an intermediate medium, or it can be the internal communication of two components. For ordinary technicians in this field, the specific meanings of the above terms in the present invention can be understood according to specific circumstances.

[0065] Example 1

[0066] The present application embodiment provides a comprehensive prevention and control method in a coal bunker multi-disaster coupling environment, such as Figure 1 As shown, the method comprises the following steps:

[0067] S1, determine the migration law of multiphase flow in the coal bunker under normal conditions;

[0068] S2, obtains sensor data monitored in real time by the integrated management and control platform, and combines it with the migration law of multiphase flow to determine the possibility of initial disasters, including gas explosions, dust explosions and coal spontaneous combustion;

[0069] S3, judging the possibility of multi-hazard coupling based on the possibility of the initial disaster;

[0070] S4, obtain real-time monitoring sensor data, and formulate a comprehensive multi-disaster control strategy in the coal bunker according to the possibility of multi-disaster coupling;

[0071] Among them, the comprehensive management and control strategy for multiple disasters in coal bunkers includes:

[0072] When it is detected that the gas concentration is too high and causes the coal spontaneous combustion disaster or the dust concentration is too high and causes the coal spontaneous combustion disaster, the operation time and wind speed of the ventilator are controlled to reduce the possibility of coal spontaneous combustion;

[0073] When it is detected that coal spontaneous combustion may cause a gas explosion or a dust explosion, the high-temperature fire source point is controlled within the maximum fire-fighting time to reduce the possibility of a gas explosion or a dust explosion.

[0074] In the embodiment, in step S1, the multiphase flow includes gas, dust and wind flow velocity in the coal bunker;

[0075] The migration of gas in coal bunkers is mainly affected by two mechanisms: diffusion and convection. The diffusion process can be described by the improved Fick law, while the convection depends on the speed of the wind flow. The migration equation of gas in coal bunkers is expressed as:

[0076]

[0077] in, is the rate of change of gas concentration over time, C gas is the real-time monitored gas concentration (usually in volume fraction %), D gas is the diffusion coefficient of gas (unit: m 2 / s), is the wind velocity vector (in m / s), S is the source term of gas, which indicates the amount of gas generated or lost in a unit volume per unit time (usually in volume fraction %), is the Laplace operator, which represents the second-order derivative in space;

[0078] The movement of dust particles in the coal bunker airflow is affected by multiple forces such as gravity. The dust movement equation in the coal bunker is expressed as:

[0079]

[0080] in, is the rate of change of dust concentration over time, C dust To monitor dust concentration in real time (in mg / m 3 ), D dust is the diffusion coefficient of dust (unit: m 2 / s), k is the dust sedimentation coefficient, which indicates the proportion of dust particles settling due to gravity and other factors in unit time (unit is s -1 ), s dust is the source term of dust (unit is mg / m 3 );

[0081] Gases (such as CO, CO2, etc.) produced during spontaneous combustion will also be affected by wind flow and migrate. The migration equation is similar to that of gas and dust, but the source term generated by chemical reactions needs to be considered. The migration equation of wind flow velocity is expressed as:

[0082]

[0083] Among them, C comb is the concentration of the gas produced by spontaneous combustion (usually expressed in volume percentage), D comb is the diffusion coefficient of the corresponding gas (in m 2 / s), s comb is the gas source term produced by the autoignition reaction (the unit is usually volume fraction %).

[0084] In the embodiment, in step S2, determining the possibility of the initial disaster occurring includes the following steps:

[0085] S21, constructing an initial disaster occurrence model, which includes a gas explosion occurrence model, a dust explosion occurrence model and a coal spontaneous combustion occurrence model;

[0086] S22, real-time monitoring of sensor data on the integrated management and control platform;

[0087] S22, calculate the average air flow velocity u in the coal bunker avg (Unit is m / s); further, the wind speed is monitored by a wind speed sensor.

[0088] S23, determining the possible initial disaster according to the average wind speed in the coal bunker and various sensor data combined with the constructed initial disaster model;

[0089] Among them, the sensor data includes gas concentration, dust concentration, gas concentration produced by coal spontaneous combustion, oxygen concentration in the coal bunker, and temperature in the coal bunker.

[0090] In the embodiment, in step S21, the gas explosion occurrence model P gas It is expressed as:

[0091]

[0092] Among them, C gas,crit is the critical concentration of gas explosion (usually expressed in volume fraction %), S gas is the intensity of the gas source (dimensionless), V coal is the total volume of coal in the coal bunker (in m 3 ), the calculation formula is:

[0093] V coal =H coal ·S

[0094] S represents the bottom area of ​​the coal bunker, m 2 .

[0095] Dust explosion occurrence model P dust It is expressed as:

[0096]

[0097] Among them, C dust,LEL It is the lower limit concentration of dust explosion (in mg / m 3 );

[0098] Coal spontaneous combustion model P comb It is expressed as:

[0099]

[0100] Among them, C comb,crit is the critical concentration of the spontaneous combustion gas (usually expressed in volume fraction %), usually measured experimentally, C comb,crit Stored in the coal seam basic data of the management and control platform, I spont is the spontaneous combustion tendency index of coal, I spont Stored in the coal seam basic data of the management and control platform, T t is the real-time temperature in the coal bunker (in °C), T0 is the reference temperature of the coal bunker (in °C), ΔT is the reference range of temperature increase (in °C), is the real-time monitored oxygen concentration (usually expressed in volume fraction %). It is the critical concentration of oxygen to support combustion (usually expressed in volume fraction %).

[0101] It should be noted that when an initial disaster is determined to have occurred, such as when the threshold of a certain disaster is monitored to have exceeded the limit, and other disasters are determined to be non-hazardous, the corresponding prevention and control measures will be automatically initiated to achieve timely response and linkage control of the initial disaster. For example, when the temperature in the coal bunker rises abnormally and there is a risk of spontaneous combustion, fire extinguishing measures such as nitrogen injection or liquid CO2 injection will be automatically initiated to eliminate the risk of spontaneous combustion in a timely manner. When an initial disaster occurs, timely control of the initial disaster can avoid the occurrence of multiple disasters and reduce the occurrence of major coal bunker accidents.

[0102] In an embodiment, determining the possibility of multi-hazard coupling occurrence includes:

[0103] When the gas or dust concentration is too high, if the ventilator is started to increase the air flow speed, the possibility of promoting coal spontaneous combustion can be determined by the calculation formula:

[0104]

[0105] Among them, I spont,promote is the coal spontaneous combustion promotion index (dimensionless), u vent is the air velocity of the fan (in m / s), H coal is the stacking height of coal in the coal bunker (in m), H coal Through the coal position sensor data acquisition of the integrated management and control platform, u maxis the maximum value of wind speed (in m / s); H max is the maximum coal position in the coal bunker (in m), T is the accumulation time of coal in the bunker (in days), T min is the shortest spontaneous combustion period of coal (in days), T min It is measured through the coal spontaneous combustion tendency experiment and stored in the basic data of the intelligent mine comprehensive management and control platform;

[0106] Or when coal spontaneous combustion occurs, the possibility of gas or dust explosion is calculated as follows:

[0107]

[0108] Among them, Q spont Q is the heat generated by spontaneous combustion of coal (in J), which reflects the severity of spontaneous combustion; ign is the ignition energy threshold of gas or dust (in J), that is, the minimum energy required to cause an explosion, C ex is the current gas or dust concentration (usually expressed in volume fraction %), C ex The lower explosion limit concentration C LEL The ratio reflects the potential danger of explosion.

[0109] It should be noted that the heat calculation formula for coal spontaneous combustion is:

[0110]

[0111] Among them, Q0 is the basic heat release at the reference temperature T0 (in J), which is measured experimentally and stored in the intelligent mine comprehensive management and control platform; γ is the reaction rate constant, which describes the rate of heat release with increasing temperature and is dimensionless; T is the current coal temperature (in °C); T0 is the reference temperature, which is selected as the temperature point where coal begins to self-heat significantly.

[0112] In the embodiment, when it is detected that the gas concentration is too high and causes the coal spontaneous combustion disaster or the dust concentration is too high and causes the possibility of the coal spontaneous combustion disaster, if the ventilator is started, the degree of air leakage will increase under the action of the negative pressure of the ventilator, thereby aggravating the degree of spontaneous combustion. Therefore, in this case, the ventilator can only be started after the spontaneous combustion parameters are reduced to the threshold. Therefore, by controlling the operating time and wind speed of the ventilator, the occurrence of coal spontaneous combustion can be avoided.

[0113] Specifically, the calculation formulas for the fan's operating time and wind speed include:

[0114] The initial gas concentration or dust is C0, the concentration after time t is C(t), and the ventilation efficiency coefficient is λ. The formula for the change of concentration over time can be expressed as: C(t) = C0e -λt ;

[0115] In order to reduce the concentration to a safe threshold C safe The following equation is solved to obtain: C safe =C0e -λt ;

[0116] The calculation formula of the fan running time t is:

[0117] Assume that the fan operates at a constant wind speed v (in m / s) and air volume Q (in m 3 / s), then the ventilator should be able to replace at least a volume of space V in time t. coal The amount of air, therefore: Q·t=V coal

[0118] The air volume Q is the product of the fan's wind speed v and the vent area A: Q = v·A

[0119] Substituting the expression for Q into the previous equation, we get: v·A·t=T coal

[0120] Solving this equation yields the required wind speed v:

[0121] Calculate the fan speed based on the fan operating time:

[0122] It should be noted that nitrogen injection and liquid C O2 The system accelerates the reduction of spontaneous combustion parameters to the threshold, ventilates as soon as possible, reduces the risk of gas explosion and dust explosion, avoids high-content gas and dust from entering the coal bunker, and reduces the possibility of disasters from the source.

[0123] In an embodiment, the calculation formula for the limit fire extinguishing time includes:

[0124]

[0125] Among them, T 起始 is the starting temperature of coal spontaneous combustion, T 临界 is the critical temperature of spontaneous combustion, and r is the rate of temperature drop after the fire extinguishing system is activated.

[0126] For disasters that are prone to occur in coal bunkers, such as spontaneous combustion, gas, and dust, comprehensive disaster monitoring is achieved through sensor equipment, and ventilation fans, liquid C O2 , nitrogen injection and other disaster prevention and control equipment, and realize comprehensive monitoring, intelligent analysis and coordinated management of disasters through the management and control platform. The sensing equipment includes but is not limited to CO, temperature, O2, CH4, dust, infrared thermal imager and fiber optic temperature measurement.

[0127] To sum up, the comprehensive prevention and control method under the multi-disaster coupling environment of a coal bunker of the present invention, through the sensor data monitored in real time by the comprehensive management and control platform, and the processing of the sensor data, can not only effectively deal with a single disaster, but also determine the possibility of multiple disasters from a global and overall perspective, thereby achieving comprehensive prevention and control of disasters in the coal bunker with good prevention and control effects, providing new ideas and methods for the safety management of the coal bunker, reducing the occurrence of coal bunker accidents, and ensuring the life safety of miners.

[0128] Example 2

[0129] An embodiment of the present application provides a computer device, which includes a processor and a memory, wherein the memory stores at least one instruction or at least one program, and the at least one instruction or the at least one program is loaded and executed by the processor to implement a comprehensive prevention and control method in a multi-hazard coupled environment in a coal bunker as provided in the above method embodiment.

[0130] Figure 2 The hardware structure diagram of a device for implementing a comprehensive prevention and control method in a coal bunker multi-hazard coupling environment provided in an embodiment of the present application is shown. The device may participate in or include the device or system provided in an embodiment of the present application. Figure 2 As shown, the computer device 10 may include one or more processors 1002 (the processor may include but is not limited to a processing device such as a microprocessor MCU or a programmable logic device FPGA), a memory 1004 for storing data, and a transmission device 1006 for communication functions. In addition, it may also include: a display, an input / output interface (I / O interface), a universal serial bus (USB) port (which may be included as one of the ports of the I / O interface), a network interface, a power supply and / or a camera. It can be understood by those skilled in the art that Figure 2 The structure shown is only for illustration and does not limit the structure of the above electronic device. Figure 2 More or fewer components as shown, or with Figure 2 Different configurations are shown.

[0131] It should be noted that the one or more processors and / or other data processing circuits described above may generally be referred to herein as "data processing circuits". The data processing circuits may be embodied in whole or in part as software, hardware, firmware, or any other combination thereof. In addition, the data processing circuit may be a single independent processing module, or may be incorporated in whole or in part into any of the other components in the computer device 10 (or mobile device). As described in the embodiments of the present application, the data processing circuit acts as a processor control (e.g., selection of a variable resistor terminal path connected to an interface).

[0132] The memory 1004 can be used to store software programs and modules of application software, such as a program instruction / data storage device corresponding to a comprehensive prevention and control method in a coal bunker multi-hazard coupling environment in an embodiment of the present application. The processor executes various functional applications and data processing by running the software programs and modules stored in the memory 1004, that is, implementing the above-mentioned method. The memory 1004 may include a high-speed random access memory, and may also include a non-volatile memory, such as one or more magnetic storage devices, flash memory, or other non-volatile solid-state memory. In some examples, the memory 1004 may further include a memory remotely arranged relative to the processor, and these remote memories may be connected to the computer device 10 via a network. Examples of the above-mentioned network include, but are not limited to, the Internet, an intranet, a local area network, a mobile communication network, and combinations thereof.

[0133] The transmission device 1006 is used to receive or send data via a network. The specific example of the above network may include a wireless network provided by a communication provider of the computer device 10. In one example, the transmission device 1006 includes a network adapter (Network Interface Controller, NIC), which can be connected to other network devices through a base station so as to communicate with the Internet. In one example, the transmission device 1006 can be a radio frequency (RF) module, which is used to communicate with the Internet wirelessly.

[0134] The display may be, for example, a touch screen liquid crystal display (LCD) that enables a user to interact with a user interface of the computer device 10 (or mobile device).

[0135] Example 3

[0136] An embodiment of the present application also provides a computer-readable storage medium, which can be set in a server to store at least one instruction or at least one program related to a comprehensive prevention and control method in a coal bunker multi-disaster coupling environment in a method embodiment. The at least one instruction or the at least one program is loaded and executed by the processor to implement a comprehensive prevention and control method in a coal bunker multi-disaster coupling environment provided in the above method embodiment.

[0137] Optionally, in this embodiment, the storage medium may be located in at least one of the multiple network servers of the computer network. Optionally, in this embodiment, the storage medium may include, but is not limited to, various media that can store program codes, such as a USB flash drive, a read-only memory (ROM), a random access memory (RAM), a mobile hard disk, a magnetic disk, or an optical disk.

[0138] Example 4

[0139] The embodiment of the present invention also provides a computer program product or a computer program, which includes computer instructions stored in a computer-readable storage medium. A processor of a computer device reads the computer instructions from the computer-readable storage medium, and the processor executes the computer instructions, so that the computer device executes a comprehensive prevention and control method in a coal bunker multi-hazard coupling environment provided in the above various optional embodiments.

[0140] It should be noted that the above-mentioned sequence of the embodiments of the present application is for description only and does not represent the advantages and disadvantages of the embodiments. The above-mentioned specific embodiments of the present application are described. Other embodiments are within the scope of the appended claims. In some cases, the actions or steps recorded in the claims can be performed in an order different from that in the embodiments and still achieve the desired results. In addition, the processes depicted in the drawings do not necessarily require the specific order or continuous order shown to achieve the desired results. In some embodiments, multitasking and parallel processing are also possible or may be advantageous.

[0141] Each embodiment in this application is described in a progressive manner, and the same or similar parts between the embodiments can be referred to each other, and each embodiment focuses on the differences from other embodiments. In particular, for the device, equipment and storage medium embodiments, since they are basically similar to the method embodiments, the description is relatively simple, and the relevant parts can be referred to the partial description of the method embodiment.

[0142] A person skilled in the art will understand that all or part of the steps to implement the above embodiments may be accomplished by hardware or by instructing related hardware through a program, and the program may be stored in a computer-readable storage medium, and the above-mentioned storage medium may be a read-only memory, a disk or an optical disk, etc.

[0143] Based on the above ideal embodiments of the present invention, the relevant staff can make various changes and modifications without departing from the technical concept of the present invention through the above description. The technical scope of the present invention is not limited to the contents of the specification, and its technical scope must be determined according to the scope of the claims.

Claims

1. A comprehensive prevention and control method in a coal bunker multi-disaster coupling environment, characterized in that: The method comprises the following steps: S1, determine the migration law of multiphase flow in the coal bunker under normal conditions; S2, obtaining sensor data monitored in real time by the integrated management and control platform, and judging the possibility of the occurrence of initial disasters in combination with the migration law of the multiphase flow, wherein the initial disasters include gas explosion, dust explosion and coal spontaneous combustion; S3, judging the possibility of multi-hazard coupling based on the possibility of the initial disaster; S4, obtain real-time monitoring sensor data, and formulate a comprehensive multi-disaster management and control strategy in the coal bunker according to the possibility of multi-disaster coupling; Among them, the comprehensive management and control strategy for multiple disasters in coal bunkers includes: When it is detected that the gas concentration is too high and causes the coal spontaneous combustion disaster or the dust concentration is too high and causes the coal spontaneous combustion disaster, the operation time and wind speed of the ventilator are controlled to reduce the possibility of coal spontaneous combustion; When it is detected that coal spontaneous combustion may cause a gas explosion or a dust explosion, the high-temperature fire source point is controlled within the maximum fire-fighting time to reduce the possibility of a gas explosion or a dust explosion.

2. The comprehensive prevention and control method under the multi-disaster coupling environment of coal bunker according to claim 1, characterized in that: In step S1, the multiphase flow includes gas, dust and wind flow velocity in the coal bunker; The migration equation of gas in the coal bunker is expressed as: in, is the rate of change of gas concentration over time, C gas is the real-time monitored gas concentration, D gas is the diffusion coefficient of gas, is the wind velocity vector, S is the source term of gas, which indicates the amount of gas generated or disappeared in a unit volume per unit time. is the Laplace operator, which represents the second-order derivative in space; The dust migration equation in the coal bunker is expressed as: in, is the rate of change of dust concentration over time, C dust To monitor dust concentration in real time, D dust is the diffusion coefficient of dust, k is the sedimentation coefficient of dust, which indicates the proportion of dust particles settling due to gravity and other factors in unit time, S dust is the source term of dust; The transport equation of the wind flow velocity is expressed as: Among them, C comb is the concentration of the gas produced by spontaneous combustion, D comb is the diffusion coefficient of the corresponding gas, S comb is the gas source term produced by the autoignition reaction.

3. The comprehensive prevention and control method under the multi-disaster coupling environment of coal bunker according to claim 2, characterized in that: In step S2, determining the possibility of the initial disaster occurring includes the following steps: S21, constructing an initial disaster occurrence model, wherein the initial disaster occurrence model includes a gas explosion occurrence model, a dust explosion occurrence model, and a coal spontaneous combustion occurrence model; S22, real-time monitoring of sensor data on the integrated management and control platform; S22, calculate the average wind speed u in the coal bunker avg ; S23, determining a possible initial disaster according to the average wind speed in the coal bunker and various sensor data in combination with the constructed initial disaster model; The sensor data include gas concentration, dust concentration, gas concentration generated after spontaneous combustion of coal, oxygen concentration in the coal bunker and temperature in the coal bunker.

4. The comprehensive prevention and control method under the multi-disaster coupling environment of coal bunker according to claim 3, characterized in that: In step S21, the gas explosion occurrence model P gas It is expressed as: Among them, C gas,crit is the critical concentration of gas explosion, S gas is the intensity of the gas source, V coal is the total volume of coal in the coal bunker; The dust explosion occurrence model P dust It is expressed as: Among them, C dust，LEL It is the lower limit concentration of dust explosion; The coal spontaneous combustion model P comb It is expressed as: Among them, C comb，crit is the critical concentration of spontaneous combustion gas; I spont is the spontaneous combustion tendency index of coal; T t is the real-time temperature in the coal bunker; f0 is the reference temperature of the coal bunker; Δf is the reference range of temperature growth; It is the oxygen concentration monitored in real time; It is the critical concentration of oxygen to support combustion.

5. The comprehensive prevention and control method under the multi-disaster coupling environment of coal bunker according to claim 4, characterized in that: Judging the possibility of multi-hazard coupling includes: When the gas or dust concentration is too high, if the ventilator is started to increase the air flow speed, the possibility of promoting coal spontaneous combustion can be determined by the calculation formula: Among them, I spont，promote is the coal spontaneous combustion promotion index, u vent is the air velocity of the fan, H coal is the stacking height of coal in the coal bunker, u max is the maximum value of wind speed; H max is the maximum coal position in the coal bunker, T is the accumulation time of coal in the bunker, T min It is the shortest spontaneous combustion period of coal; Or when coal spontaneous combustion occurs, the possibility of gas or dust explosion is calculated as follows: Among them, Q spont is the heat generated by spontaneous combustion of coal, Q ign is the ignition energy threshold of gas or dust, C ex is the current gas or dust concentration, C ex The lower explosion limit concentration C LEL The ratio reflects the potential danger of explosion.

6. The comprehensive prevention and control method under the multi-disaster coupling environment of coal bunker according to claim 5, characterized in that: In step S4, the calculation formula of the running time and wind speed of the ventilator includes: The initial gas concentration or dust is C0, the concentration after time t is C(t), and the ventilation efficiency coefficient is λ. The formula for the change of concentration over time can be expressed as: C(t) = C0e -λt ; In order to reduce the concentration to a safe threshold C safe The following equation is solved to obtain: C safe =C0e -λt ; The calculation formula of the fan running time t is: Calculate the fan speed based on the fan operating time:

7. The comprehensive prevention and control method under the multi-disaster coupling environment of coal bunker according to claim 1, characterized in that: The calculation formula for the limit fire extinguishing time includes: Among them, T 起始 is the starting temperature of coal spontaneous combustion, T 临界 is the critical temperature of spontaneous combustion, and r is the rate at which the temperature drops after the fire extinguishing system is activated.

8. A computer device, characterized in that: include: processor; A memory for storing executable instructions; Wherein, the processor is used to read the executable instructions from the memory and execute the executable instructions to implement the comprehensive prevention and control method in the multi-hazard coupling environment of the coal bunker as described in any one of claims 1 to 7.

9. A computer-readable storage medium, characterized in that: The computer-readable storage medium stores a computer program, and when the computer program is executed by the processor, the processor implements the comprehensive prevention and control method in a coal bunker multi-hazard coupling environment as described in any one of claims 1 to 7.

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