Method for determining parameters of air column in mine water inrush spreading process and related equipment

Abstract

The invention provides a method for determining parameters of an air column in a mine water inrush spreading process and related equipment. The method comprises the following steps: acquiring a topological structure about a mining space in a mine; determining a closed local highest point and an air communication point based on the topological structure; determining an air column area by utilizing the closed local highest point and the air communication point based on a bottom plate elevation control area; and determining target parameters of the air column area based on the dynamic balance function of the air column area and the adjacency relation of the bottom plate elevation control area.

Description

Technical Field

[0001] This disclosure relates to the field of mine water inrush, and in particular to a method and related equipment for determining the parameters of the air column during the spread of mine water inrush. Background Technology

[0002] Mine water inrush is one of the most catastrophic hazards in underground mining, characterized by its suddenness, rapid spread, and severe consequences. While water inrush incidents have decreased significantly in recent years, this has led to a lack of experience in emergency response to water hazards. Existing mine water inrush flow propagation simulation technologies primarily rely on numerical simulation methods. Three-dimensional numerical simulation is only suitable for simulating water flow in localized, simple roadways, involving massive computations and resulting in low simulation efficiency. One-dimensional numerical simulation shows good results and is more efficient than three-dimensional simulation, but it still falls short of meeting the needs of actual disaster emergency response and often ignores the presence of air columns in confined spaces, leading to low accuracy. Summary of the Invention

[0003] This disclosure proposes a method and related equipment for determining the parameters of the air column during the spread of water inrush in mines, which at least to some extent solves the technical problems of low accuracy of gait analysis in related technologies.

[0004] In a first aspect, this disclosure provides a method for determining the parameters of the air column during the propagation of mine water inrush, including: Obtain the topological structure of the mining space in the mine; Based on the aforementioned topology, the highest point in the enclosed local area and the air connection point are determined; Based on the base plate elevation control area, the air column area is determined by the highest point of the enclosed local area and the air connection point; Based on the dynamic equilibrium function of the air column region and the adjacency relationship of the base plate elevation control area, the target parameters of the air column region are determined.

[0005] A second aspect of this disclosure provides a device for determining the parameters of an air column during the spread of water inrush in a mine, comprising: The acquisition module is used to acquire the topological structure of the mining space in the mine; The preset point module is used to determine the highest point of the enclosed local area and the air connection point based on the topology; An air column region module is used to determine the air column region based on the base plate elevation control area, using the highest point of the enclosed local area and the air connection point; The air column parameter module is used to determine the target parameters of the air column region based on the dynamic equilibrium function of the air column region and the adjacency relationship of the base plate elevation control area.

[0006] A third aspect of this disclosure provides an electronic device including a memory, a processor, and a computer program stored in the memory and executable on the processor, wherein the processor, when executing the program, implements the method as described in the first aspect.

[0007] A fourth aspect of this disclosure provides a non-transitory computer-readable storage medium storing computer instructions for causing the computer to perform the method described in the first aspect.

[0008] A fifth aspect of this disclosure provides a computer program product including computer program instructions that, when executed on a computer, cause the computer to perform the method as described in the first aspect.

[0009] As can be seen from the above, the method and related equipment for determining air column parameters during the spread of mine water inrush provided in this disclosure determine the highest point and air connection point in a confined space based on the topology of the mine excavation space. Based on the elevation control zone of the mine floor, the method uses the highest point and air connection point to search for areas where air columns may form, thus pre-determining areas that may form air columns in the complex mining space structure and reducing the complexity of air column calculations. Finally, within the area where air columns form, a dynamic equilibrium equation is established where the water pressure difference between the inside and outside of the area equals the air pressure difference. Based on the adjacency relationship of the elevation control zone of the mine floor, the dynamic changes of air columns within the area combining multiple control zones are calculated, providing a basis for determining potential refuge areas for trapped personnel after a disaster. The method allows for rapid and accurate calculation of air columns during the spread of mine water inrush under different water inrush conditions, providing a basis for emergency plan design and emergency rescue and disposal scheme formulation, and has strong operability. Attached Figure Description

[0010] To more clearly illustrate the technical solutions in this disclosure or related technologies, the accompanying drawings used in the description of the embodiments or related technologies will be briefly introduced below. Obviously, the accompanying drawings described below are only embodiments of this disclosure. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort.

[0011] Figure 1 This is a schematic diagram of the parameter determination architecture for the air column during the mine water inrush propagation process according to an embodiment of this disclosure.

[0012] Figure 2 This is a schematic diagram of the hardware structure of an exemplary electronic device according to an embodiment of the present disclosure.

[0013] Figure 3 This is a flowchart illustrating a method for determining the parameters of an air column during a mine water inrush propagation process, according to an embodiment of this disclosure.

[0014] Figure 4 This is a schematic diagram of the flow of the highest point of the enclosed local area and the air connection point in an embodiment of this disclosure.

[0015] Figure 5 This is a schematic diagram of the topological structure of an example mine excavation space according to an embodiment of this disclosure.

[0016] Figure 6 This is a schematic diagram of the process for searching and determining the air column region according to an embodiment of the present disclosure.

[0017] Figure 7 This is a flowchart illustrating the dynamic changes of the air column within a region that combines multiple control zones according to an embodiment of this disclosure.

[0018] Figure 8 This is a schematic diagram illustrating the calculation of the air column within a region that combines multiple control zones according to an embodiment of this disclosure.

[0019] Figure 9 This is a schematic diagram of the elevation structure of the bottom plate of a mine roadway according to an embodiment of this disclosure.

[0020] Figures 10-11 This is a schematic diagram showing the result of the air column in a mine roadway according to an embodiment of this disclosure.

[0021] Figure 12 This is a schematic diagram of a device for determining the parameters of an air column during the spread of water inrush in a mine, according to an embodiment of this disclosure. Detailed Implementation

[0022] To make the objectives, technical solutions, and advantages of this disclosure clearer, the following detailed description is provided in conjunction with specific embodiments and the accompanying drawings.

[0023] It should be noted that, unless otherwise defined, the technical or scientific terms used in the embodiments of this disclosure should have the ordinary meaning understood by one of ordinary skill in the art to which this disclosure pertains. The terms "first," "second," and similar terms used in the embodiments of this disclosure do not indicate any order, quantity, or importance, but are merely used to distinguish different components. Terms such as "comprising" or "including" mean that the element or object preceding the word encompasses the elements or objects listed following the word and their equivalents, without excluding other elements or objects. Terms such as "connected" or "linked" are not limited to physical or mechanical connections, but can include electrical connections, whether direct or indirect. Terms such as "upper," "lower," "left," and "right" are used only to indicate relative positional relationships; when the absolute position of the described object changes, the relative positional relationship may also change accordingly.

[0024] It is understood that before using the technical solutions disclosed in the embodiments of this disclosure, users should be informed of the types, scope of use, and usage scenarios of the personal information involved in this disclosure through appropriate means in accordance with relevant laws and regulations, and user authorization should be obtained. For example, in response to receiving a user's active request, a prompt message may be sent to the user to clearly inform the user that the requested operation will require the acquisition and use of the user's personal information. This allows the user to independently choose whether to provide personal information to the software or hardware such as electronic devices, applications, servers, or storage media that perform the operations of the technical solutions of this disclosure, based on the prompt message.

[0025] It is understood that the above notification and user authorization process are merely illustrative and do not constitute a limitation on the implementation of this disclosure. Other methods that comply with relevant laws and regulations may also be applied to the implementation of this disclosure.

[0026] Figure 1 A schematic diagram of the parameter determination architecture for the air column during the spread of mine water inrush according to an embodiment of this disclosure is shown. (Reference) Figure 1 The architecture 100 for determining the parameters of the air column during the water inrush propagation process in this mine may include a server 110, a terminal 120, and a network 130 providing a communication link. The server 110 and the terminal 120 can be connected via a wired or wireless network 130. The server 110 can be a standalone physical server, a server cluster or distributed system composed of multiple physical servers, or a cloud server providing basic cloud computing services such as cloud services, cloud databases, cloud computing, cloud functions, cloud storage, network services, cloud communication, middleware services, security services, and CDN.

[0027] Terminal 120 can be implemented in hardware or software. For example, when terminal 120 is implemented in hardware, it can be various electronic devices with a display screen and support page display, including but not limited to smartphones, tablets, e-book readers, laptops, and desktop computers. When terminal 120 is implemented in software, it can be installed in the electronic devices listed above; it can be implemented as multiple software programs or software modules (e.g., software programs or software modules used to provide distributed services) or as a single software program or software module, without specific limitations.

[0028] It should be noted that the method for determining the parameters of the air column during the mine water inrush propagation process provided in this application embodiment can be executed by the terminal 120 or by the server 110. It should be understood that... Figure 1 The number of terminals, networks, and servers shown is for illustrative purposes only and is not intended to be a limitation. Any number of terminals, networks, and servers can be used depending on implementation needs.

[0029] Figure 2 A schematic diagram of the hardware structure of an exemplary electronic device 200 provided in an embodiment of this disclosure is shown. For example... Figure 2 As shown, the electronic device 200 may include: a processor 202, a memory 204, a network module 206, a peripheral interface 208, and a bus 210. The processor 202, memory 204, network module 206, and peripheral interface 208 are interconnected within the electronic device 200 via the bus 210.

[0030] Processor 202 may be a Central Processing Unit (CPU), a Neural Processing Unit (NPU), a Microcontroller (MCU), a programmable logic device, a Digital Signal Processor (DSP), an Application Specific Integrated Circuit (ASIC), or one or more integrated circuits. Processor 202 can be used to perform functions related to the techniques described in this disclosure. In some embodiments, processor 202 may also include multiple processors integrated as a single logic component. For example, such as... Figure 2 As shown, processor 202 may include multiple processors 202a, 202b and 202c.

[0031] Memory 204 can be configured to store data (e.g., instructions, computer code, etc.). Figure 2 As shown, the data stored in memory 204 may include program instructions (e.g., program instructions for implementing the method for determining parameters of the air column during the spread of water inrush in mines according to embodiments of this disclosure) and data to be processed (e.g., the memory may store configuration files of other modules, etc.). Processor 202 may also access the program instructions and data stored in memory 204 and execute the program instructions to operate on the data to be processed. Memory 204 may include volatile storage devices or non-volatile storage devices. In some embodiments, memory 204 may include random access memory (RAM), read-only memory (ROM), optical disk, magnetic disk, hard disk, solid-state drive (SSD), flash memory, memory stick, etc.

[0032] Network module 206 can be configured to provide communication with other external devices to electronic device 200 via a network. This network can be any wired or wireless network capable of transmitting and receiving data. For example, the network can be a wired network, a local wireless network (e.g., Bluetooth, WiFi, Near Field Communication (NFC), etc.), a cellular network, the Internet, or a combination thereof. It is understood that the type of network is not limited to the specific examples described above. In some embodiments, network module 206 may include any combination of any number of network interface controllers (NICs), radio frequency modules, transceivers, modems, routers, gateways, adapters, cellular network chips, etc.

[0033] The peripheral interface 208 can be configured to connect the electronic device 200 to one or more peripheral devices to enable information input and output. For example, peripheral devices may include input devices such as keyboards, mice, touchpads, touch screens, microphones, and various sensors, as well as output devices such as displays, speakers, vibrators, and indicator lights.

[0034] Bus 210 can be configured to transmit information between various components of electronic device 200 (e.g., processor 202, memory 204, network module 206, and peripheral interface 208), such as internal buses (e.g., processor-memory bus), external buses (USB port, PCI-E bus), etc.

[0035] It should be noted that although the architecture of the above-described electronic device 200 only shows the processor 202, memory 204, network module 206, peripheral interface 208, and bus 210, in specific implementations, the architecture of the electronic device 200 may also include other components necessary for normal operation. Furthermore, those skilled in the art will understand that the architecture of the above-described electronic device 200 may only include the components necessary for implementing the embodiments of this disclosure, and does not necessarily include all the components shown in the figures.

[0036] Mine water inrush is one of the most catastrophic hazards in underground mining, characterized by its suddenness, rapid spread, and severe consequences. While water inrush incidents have decreased significantly in recent years, this has led to a lack of experience in emergency response. Among related technologies, the calculation of the air column during the spread of mine water inrush is a crucial basis for emergency plan design and emergency rescue and disposal scheme formulation. Some technologies utilize computational fluid dynamics software CFX to simulate the spread of water flow in three-dimensional bifurcated roadways, obtaining the transient distribution of water flow in three-dimensional space and analyzing the characteristics and risks of water flow during the flow process in bifurcated roadways. Other technologies, based on SWMM, simplify the spread of mine water inrush into a one-dimensional water flow simulation, more closely approximating the physical laws of real water flow spread, and performing numerical solutions and visualization analysis. Although their methods have higher computational efficiency than 3D methods, they are still insufficient for actual disaster response needs. Some related technologies utilize graph theory to solve for the downward and upward paths of water inrush, and use empirical formulas to calculate the spread rate and time of water inrush. Some related technologies have used FLUENT software to numerically simulate the gas-liquid two-phase flow after a water inrush at the working face of a tunnel in karst areas, revealing the characteristics of the water flow and considering the role of air in the spread of the water. However, the computational cost is high, and it is only applicable to local roadways or small-scale tunnels. Therefore, how to accurately and efficiently determine the parameters of the air column during the spread of water inrush in mines has become an urgent technical problem to be solved.

[0037] In view of this, this disclosure provides a method and related equipment for determining the parameters of an air column during the spread of water inrush in a mine. Considering that during mine excavation, roadways often form complex spatial structures due to the undulating terrain of the coal seam, the formation and dynamic changes of the air column during water inrush are mainly affected by the complex topology of the mining space, especially the enclosed local highest points and air connectivity points. The calculation of the air column reveals the pressure changes caused by water-air interaction, providing a scientific basis for determining potential refuge areas for underground personnel. Based on the topology of the mine excavation space, the enclosed local highest points and air connectivity points are determined. Based on the elevation control area of ​​the mining space floor, the regions where air columns may form are searched using the enclosed local highest points and air connectivity points, thus pre-determining the regions in the complex mining space structure where air columns may form and reducing the complexity of air column calculation. Finally, within the area where the air column forms, a dynamic equilibrium equation is established where the water pressure difference between the inside and outside of the area equals the air pressure difference. Based on the adjacency relationship of the control zones at the bottom elevation of the mining space, the dynamic changes of the air column within the area of ​​multiple control zones are calculated, providing a basis for determining potential refuge areas for trapped personnel underground after a disaster. According to different water inrush conditions, the air column during the spread of mine water inrush is calculated quickly and accurately, providing a basis for emergency plan design and the formulation of emergency rescue and disposal plans, demonstrating strong operability.

[0038] See Figure 3, Figure 3 A schematic flowchart illustrating a method for determining the parameters of an air column during the spread of a mine water inrush according to an embodiment of the present disclosure is shown. The method for determining the parameters of an air column during the spread of a mine water inrush according to an embodiment of the present disclosure can be deployed on a server or a terminal. Figure 3 In the process of mine water inrush propagation, the method 300 for determining the parameters of the air column can further include the following steps.

[0039] In step S310, the topological structure of the mining space in the mine is obtained.

[0040] The topology of the mining space in a mine can include a network layout consisting of development roadways and auxiliary roadways. The arrangement, connections, and spatial distribution of these roadways within the mine collectively constitute the mine's topology. The topology can include a first type of node, which can be a key cross-sectional location, such as a slope change point, a bifurcation point, or a location where the cross-sectional shape or size changes. This first type of node can contain three-dimensional coordinate information, such as the horizontal and vertical coordinates (xy) and the floor elevation (z) on a horizontal plane. The topology can also include air connectivity points, which can be points in contact with the atmosphere, such as mine shaft entrances, ventilation shaft entrances, or other ventilation openings marked as entrance nodes.

[0041] In step S320, the highest point of the enclosed local area and the air connection point are determined based on the topology.

[0042] Among these, the highest points in a confined area are completely sealed, preventing air exchange with the external environment. In mine water inrush environments, these points play a crucial role in controlling the formation and changes of the air column because they trap air and create pressure differentials as the water level rises. The sealed nature of these high points ensures air compression, thus affecting the balance between water and air pressure. Air communication points maintain communication with the outside atmosphere through the mining space. These points represent key locations for air exchange with the external environment and do not form confined spaces even when the water level rises. Confined local maxima and air communication points are local maxima or diversion points in the mining space, playing a vital role in the formation and dynamic changes of the air column.

[0043] In some embodiments, determining the highest point of a closed local area based on the topology includes: The local highest point is determined based on the topology; The local highest point belonging to the preset type is determined as the closed local highest point.

[0044] The topology of a mine's excavation space can include all major roadways, working faces, intersections, and other key elements. By analyzing the topology diagram, all possible local highest points are identified. These can be the vertices of roadways or working faces, or higher positions at roadway intersections. Local highest points belonging to a predefined type can be designated as enclosed local highest points. Predefined types can include local highest points located within enclosed areas and not easily affected by ventilation. By analyzing the location, surrounding environment, and ventilation conditions of these points, points that meet the characteristics of enclosed local highest points can be selected. For example, predefined types could be single-ended roadways, enclosed doors, etc. A local highest point can be defined as a point whose floor elevation is higher than the floor elevations of all its adjacent points, i.e., the point with the highest floor elevation within a local area of ​​the excavation space; a local lowest point corresponds to the point with the lowest floor elevation within a local area.

[0045] In some embodiments, the air connectivity point includes a first air connectivity point and a second air connectivity point; determining the air connectivity point based on the topology includes: The node in the topology that is in direct contact with the atmosphere is defined as the first air connectivity point; Based on the first air connection point, a search is performed along the direction of decreasing elevation of the base plate, and the branching points on the search path are determined as the second air connection point.

[0046] The first air connectivity point can be a node directly in contact with the atmosphere, such as a mine entrance, ventilation shaft, or other ventilator. In the topology diagram, these points can be directly identified as nodes connected to the external environment. The second air connectivity point can be a branch point located on the ventilation path that can affect airflow. Starting from the first air connectivity point, the search proceeds along the direction of decreasing floor elevation. This can represent starting from the mine entrance or ventilation shaft and extending along the roadway deeper into the mine. During the search, all encountered branch points are recorded. These could be roadway intersections, branches, or other points that can change the direction of airflow. Determining the highest point and air connectivity points in a confined area based on the topology of the mining space allows for a more accurate understanding of the ventilation conditions and safety risks within the mine, and provides important reference for emergency management and escape route planning.

[0047] In some embodiments, based on the first air connection point, a search is performed along the direction of decreasing elevation of the base plate, and the branching points on the search path are determined as the second air connection point, including: For the current base plate elevation control area where the first air connection point is located, the nodes of the current base plate elevation control area are searched along the direction of the decrease in base plate elevation, and the branching point on the search path is determined as the second air connection point of the current base plate elevation control area; The search is performed along the direction of decreasing base elevation to find the base elevation control area adjacent to the second air connection point. The branching point on the search path is determined as the second air connection point of the adjacent base elevation control area until a local minimum point is reached.

[0048] The floor elevation control zone can be understood as different areas within a mine, divided according to floor height. First, all local highest points and absolute bifurcation points in the mining space topology can be identified. An absolute bifurcation point refers to a point where downhill branch roadways do not converge to the same local lowest point. Then, using all local highest points and absolute bifurcation points in the mining space topology, the mining space topology is divided into several regions, thus obtaining the floor elevation control zone. Starting from the first air connection point, its floor elevation control zone is determined. From the first air connection point, the search proceeds along the direction of decreasing floor elevation (i.e., towards the depth of the mine) within the current floor elevation control zone, moving along the roadway network towards areas with lower elevations. Once a local lowest point (i.e., the roadway or working face with the lowest floor elevation in that area) is reached within the current floor elevation control zone, the search shifts to adjacent control zones with even lower floor elevations. The search continues along the direction of decreasing floor elevation by connecting the lowest point of the current control zone with nodes in adjacent control zones (these nodes may be roadway entrances, intersections, etc.). Within adjacent control zones, all encountered branching points are recorded and designated as the second air connection points for that control zone. This process is repeated, each time moving from the lowest point of one control zone to an adjacent control zone with a lower floor elevation, until the global lowest point in the mine (i.e., the lowest floor elevation in the entire mine) is reached.

[0049] Specifically, such as Figure 4 As shown, based on the topology of the mine excavation space, the highest point and air connection point in the enclosed area are determined, specifically including: Step 110: Traverse the local highest points in the mining space. If it is a dead-end roadway or a closed door, it can be identified as a closed local highest point. In this step, the highest local point in the mining space is the primary location for air compression, typically a dead-end roadway or a sealed door. For example... Figure 5 As shown, as an exemplary topological model of a mine excavation space, this example topological model includes two enclosed local maxima: 0 and 12.

[0050] Step 120: Determine the wellhead or other point in the mining space that is directly in contact with the atmosphere as the initial air connection point; In this step, the air connection point in the mining space is the key location for air exchange with the external environment. Generally, the mine shaft entrance or other points directly in contact with the atmosphere are the initial air connection points. For example... Figure 5As shown, this example topology model includes two wellheads, or points directly in contact with the atmosphere: 32 and 48.

[0051] Step 130: Using the base plate control area as the basic unit, start the search from the initial air connection point.

[0052] In this step, based on the determined initial air connectivity point, the remaining air connectivity points are searched for towards adjacent points whose base elevation continuously decreases. For example... Figure 5 As shown, in this example topology model, the search proceeds from node 32 towards directions 31 and 28, where the elevation of the base plate decreases. The branching points on the search path are recorded as air connectivity points.

[0053] Step 140: Determine the type of the current control area. If the lowest point is a local lowest point, stop the search; if the lowest point is a branch point, continue the search and proceed to Step 150.

[0054] In this step, if the lowest point of the control area is a local minimum, then there are no adjacent downstream control areas, and the search does not need to continue. Figure 5 As shown, the lowest points of control regions CA7 and CA8, where air connectivity point 39 is located, are both local lowest points, and there are no adjacent downstream control regions, so further searching is not necessary. If the lowest point is a branch point, then there are adjacent downstream control regions, and further searching is necessary, such as... Figure 5 As shown, the lowest point 28 of the control area CA6 where air connectivity point 32 is located is a branch point, and the search needs to continue.

[0055] Step 150: Record the lowest split point in the current control area as an air connection point, search for the adjacent control areas of the air connection point, and then return to step 140.

[0056] In this step, when the water level rises at the downstream branch of the lowest branch point, the air at that point can exchange air with the outside through the upstream air connection point, without forming air compression; therefore, it is also an air connection point. For example... Figure 5 As shown, the lowest branch point 28 of control area CA6 can exchange air with the outside through the upstream air connection point 32, which is also an air connection point.

[0057] Step 160: Repeat steps 130 to 150 above until all initial air vertices have been searched, i.e., all air vertices have been determined.

[0058] In this step, once all downstream air vertices of all initial connected vertices have been searched, all air vertices are determined. For example... Figure 5 As shown, in this example topology model, using the initial air connectivity points 32 and 48, all downstream air connectivity points 28, 24, and 39 are searched.

[0059] In step S330, based on the base plate elevation control area, the air column area is determined using the highest point of the sealed local area and the air connection point.

[0060] After determining the highest point in the enclosed area and the air connection point in the mining space, the areas where air columns may form can be identified based on these two types of points and their connections within the mining space. This provides a basis for calculating air columns and reduces the complexity of air column calculations in complex mining spaces. The foundation elevation control zone refers to the elevation control of the building foundation slab. By setting elevation control points within this zone and conducting precise measurements, the elevation of the foundation slab is ensured to meet design requirements.

[0061] In some embodiments, based on the floor elevation control zone of the mining space, the air column region is determined using the highest point of the enclosed local area and the air connection point, including: Determine whether there are any air connections within the base plate elevation control zone where the highest point of the enclosed local area is located; If an air connection point exists in the base plate elevation control area where the highest point of the enclosed local area is located, then the maximum elevation point connecting the air connection point and the highest point of the enclosed local area is determined. In response to the maximum elevation point being less than the highest point of the enclosed local area, the base plate elevation control area where the highest point of the enclosed local area is located is determined as the air column area.

[0062] After determining the base elevation control zone where the highest point of the enclosed area is located, it's possible to check for air connections within that zone. If air connections are found within the base elevation control zone where the highest point of the enclosed area is located, the maximum elevation connecting these connections to the highest point of the enclosed area can be determined. A path can be taken from the air connection point, following the direction of decreasing base elevation, to the highest point of the enclosed area (or a higher position, but not exceeding the highest point of the enclosed area), and the highest elevation along this path can be recorded. If the maximum elevation is lower than the elevation of the highest point of the enclosed area, this indicates that a relatively enclosed space, i.e., an air column region, has formed between the highest point of the enclosed area and the air connections.

[0063] In some embodiments, method 300 further includes: In response to the maximum elevation point being greater than or equal to the highest point of the enclosed local area, it is determined that the air column area does not exist in the base plate elevation control zone where the highest point of the enclosed local area is located.

[0064] Specifically, when the maximum elevation point is greater than or equal to the highest point of the enclosed local area, it indicates that there is no air column region within the base elevation control zone where the highest point of the enclosed local area is located. In this case, air can freely flow through these higher points to the area above or around the highest point of the enclosed local area, without forming a relatively closed air column region.

[0065] In some embodiments, method 300 further includes: In response to the absence of an air connection point in the base plate elevation control area where the highest point of the enclosed local area is located, the search continues for adjacent base plate elevation control areas until an air connection point is detected in the base plate elevation control area. The sum of the areas of all the base plate elevation control areas searched starting from the base plate elevation control area where the highest point of the sealed local area is located is determined as the air column area.

[0066] If no air connection point exists within the base elevation control zone where the highest point of the enclosed area is located, the search can continue to adjacent base elevation control zones until an air connection point is found. Once an air connection point is found, the sum of all searched base elevation control zones, starting from the base elevation control zone where the highest point of the enclosed area is located and ending at the base elevation control zone containing the air connection point, can be defined as the air column region.

[0067] Specifically, such as Figure 6 As shown, based on the elevation control zone of the mining space floor, the area where air columns form is searched using the highest local point and air connectivity points in a closed environment. Specifically, this includes: Step 210: Determine the control zone containing all the highest points of the enclosed local areas, and mark it as S.

[0068] In this step, when a sudden water inrush causes the water level to rise, the air inside the mine is compressed into a confined, localized high point. Therefore, the control area where this confined, localized high point is located is selected as the initial region for the formation of the air column. For example... Figure 5 As shown, in this example topology model, the control area CA2 where the enclosed local high point 12 is located is labeled as S.

[0069] Step 220: Determine the control zone marked S. If an air connection point exists within the control zone, determine the maximum elevation point connecting the air connection point and the highest point of the enclosed local area. If the top elevation of this point is lower than the bottom elevation of the highest point of the enclosed local area, record this control zone and stop searching; otherwise, the conditions for forming an air column are not met. If no air connection point exists within the control zone, continue searching.

[0070] In this step, if the control area containing the enclosed local elevation also contains air connectivity points, then this control area is likely the region where an air column can form. Next, determine the maximum elevation point connecting the enclosed local elevation and the air connectivity points. Only when the top elevation of this point is lower than the bottom elevation of the enclosed local elevation can a closed space be formed during a water level rise, thus creating an air column. Otherwise, when the enclosed local elevation is flooded, the air inside can transfer to the air connectivity points through the top space of the maximum elevation point, preventing the formation of an air column. If the control area containing the enclosed local elevation does not contain air connectivity points, then other adjacent control areas need to be searched. Figure 5 As shown, control region CA2 does not contain air connectivity points, so we need to continue searching for adjacent control regions.

[0071] Step 230: Search adjacent control regions to determine if other boundary points of adjacent control regions are air-connected points. If so, stop the search; otherwise, continue.

[0072] In this step, the air connection point is the point that maintains air exchange with the outside and also the point where a water pressure difference is generated. Maintaining equilibrium with the air pressure difference, it can serve as the search stop point for the air column generation area. For example... Figure 5 As shown, the search begins in control region CA2 and extends to adjacent control regions CA1 and CA0. Neither of these control regions has an air connection. The search continues to the adjacent control region CA3, which contains air connection 24, so the search stops. Therefore, control regions CA0, CA1, CA2, and CA3 together form the region where the air column is formed.

[0073] In step S340, the target parameters of the air column region are determined based on the dynamic equilibrium function of the air column region and the adjacency relationship of the base plate elevation control area.

[0074] The dynamic equilibrium function of the air column region describes the state of airflow within the air column, including the dynamic changes in parameters such as air pressure, velocity, and temperature. This function may involve multiple variables, such as mine ventilation volume, roadway cross-section, and airflow resistance, which together determine the dynamic changes in the air column region.

[0075] In some embodiments, the target parameters of the air column region are determined based on the dynamic equilibrium function of the air column region and the adjacency relationship of the base plate elevation control area, including: Before the top plate of the local lowest point in the air column region is submerged, the water level on both sides of the local lowest point is the same. After the top plate of the local lowest point in the air column region is submerged, the water level and water accumulation outside the air column region are determined based on the dynamic equilibrium function when the water level in the air column region reaches the bottom plate elevation of the boundary point of each bottom plate elevation control zone.

[0076] Within an air column region, if a local lowest point exists, the water levels on both sides of this point are the same before the roof is submerged, meaning the water level within the air column region remains relatively balanced. Once the roof at the local lowest point is submerged, the water level within the air column region will begin to rise, potentially affecting adjacent floor elevation control zones. A dynamic equilibrium function can be used to determine the water level and volume at which the water level within the air column region reaches the floor elevations at the boundary points of each floor elevation control zone. Target parameters for the air column region can include the water level changes and volume before and after the roof at the local lowest point is submerged, as well as the water level and volume in adjacent floor elevation control zones. These target parameters help in developing effective mine drainage and ventilation management measures to ensure mine safety.

[0077] In some embodiments, within the region where the air column forms, a dynamic equilibrium equation is established where the water pressure difference between the inside and outside of the region equals the air pressure difference: ; in, The density of water, g It is the acceleration due to gravity. h 2 represents the water level on the high-pressure side. h 1 represents the water level on the low-pressure side. n It is the amount of matter in the air (i.e., the number of molecules in the air, measured in mol). R It is the gas constant. T It is the thermodynamic temperature of air (in Kelvin). V ( h 1) represents the gas volume. V ( h 1) Available mine roadway dimensions and h 1. Calculation; P 0 is the standard atmosphere.

[0078] The air column is formed because rising water levels submerge the roof of the mining space, causing air compression and creating a water level difference. A pressure balance method is established by using the difference between water pressure and air pressure within and outside the area. As the water volume increases, both the water pressure difference and the air pressure difference increase, reaching a dynamic equilibrium. In areas combining multiple control zones, the volume of compressed air is calculated from the volumes of all control zones.

[0079] In some embodiments, such as Figure 7 As shown, based on the adjacency relationship of the control zones for the floor elevation of the mining space, the dynamic changes of the air column within the region of multiple control zone combinations are calculated, specifically including: Step 410: The water level on both sides remains consistent before the top plate at the local lowest point is submerged.

[0080] In this step, such as Figure 8As shown, when the water rushes into the control area CA3 from point 24, it preferentially flows to the local lowest point 22. Before the top plate of point 22 is submerged, the water levels on both sides are equal, controlled by the cumulative inflow of water.

[0081] Step 420: After the top plate at the local lowest point is submerged, use the dynamic equilibrium equation to calculate the high water level and water accumulation outside the area when the water level in the area reaches the bottom plate elevation of each control zone boundary point.

[0082] Among them, such as Figure 8 As shown, after the top plate of point 22 is submerged, the area to the left of point 22, including CA0, CA1, and CA2, forms a closed space, leading to the formation of an air column. When the water level to the left of CA3 reaches the top plate elevation of the local highest point 16... h 1,1 At that time, the water level on the right side h 2,1 The calculation formula is as follows:

[0083] in h 1,1 This refers to the water level on the left side of CA3. h 2,1 This represents the high water level on the right side, which is connected to the atmosphere. V c It is the volume of compressed air; V CA0 , V CA1 , V CA2 These represent the total volumes of control areas CA0, CA1, and CA2, respectively. The volume of the tunnel section between points 14 and 16.

[0084] As the sudden inrush continues, the water flow passes the highest local point 16 and flows towards the lowest local point CA0. When the water level at CA0 reaches the top elevation of point 2... h 1,2 At that time, the water level on the right side that is connected to the atmosphere h 2,2 The calculation formula is as follows:

[0085] in h 1,2 The water level in CA0; h 2,2 This indicates the high water level on the right side that is connected to the atmosphere; V CA0 ( h 1,2 ) represents the roadway in control area CA0 at elevation h1,2 The following volumes.

[0086] As the top slab of local lowest point 2 was submerged, the air column split into two isolated parts. When the water level on the right side of CA0 reached the bottom slab elevation of point 5... h 1,3 At that time, the water level on the right side that is connected to the atmosphere h 2,3 The calculation formula is as follows:

[0087] in h 2,3 This represents the water level on the right side that is connected to the atmosphere. V 5-7 and V 5-14 The volumes of the tunnels between points 5-7 and 5-14 are respectively; the water level on the left side of CA0. The calculation formula is as follows:

[0088] in h 1,3 Indicates the water level to the right of CA0; This indicates the volume of compressed air to the left of CA0. This indicates the elevation of the roadway section between point 0 and point 1. The above volumes.

[0089] An exemplary description of steps 410 to 420 is as follows: like Figure 9 As shown, a mine section comprising 12 points and 11 roadway segments is selected. The lowest point in the lower left corner of the roadway is sealed to isolate it from air. The highest point in the upper right corner serves as a water inlet. A depression is formed in the middle of the roadway, with the lowest point having a floor elevation of 118.0 meters. The highest point to the left of the lowest point has a floor elevation of 136.5 meters, and the highest point to the right has a floor elevation of 138.0 meters. Optionally, in practical applications, sealed highest points (purple dots), air-connected points (yellow dots), and lowest points (green dots) can be marked in the roadway, while ordinary nodes are marked with blue dots.

[0090] Furthermore, with Figure 9 Taking a tunnel as an example, when water enters from the highest point on the far right, it first flows downwards to the lowest point in the middle, where water begins to accumulate. Before the roof of the lowest point is submerged, the water levels on both sides remain balanced; however, once the roof of the lowest point is submerged, a water level difference begins to form, such as... Figure 10 As shown. The corresponding calculation results for the air column are as follows. Figure 10As shown, the water level on both sides is 123.1m. As the water level rises further, the difference in water level between the two sides gradually widens. When the water level on the right reaches 138.0m, the water level on the left has not yet reached the elevation of the bottom slab at the highest point in the local area. Figure 11 As shown. The corresponding air column calculation results are as follows. Figure 11 As shown, the water level on the right is 138.0 m, and the water level on the left is 129.9 m. As the water level on the right continues to rise, the low water level on the left will reach the local highest point of the slab elevation and begin to spread towards the local lowest point on the far left.

[0091] The critical point is when the water level on the left side reaches the elevation of the highest local point on the floor. Before this point, personnel in the left area remain safe due to the presence of the air column. Once water begins to accumulate at the lowest local point on the left, personnel in the left area need to move towards the highest local point, as this is where the air column is ultimately compressed, ensuring the safety of personnel underground. Therefore, the method for calculating the air column during the spread of mine water inrush provided in this application can quickly and accurately calculate the air column during the spread of mine water inrush, based on different water inrush conditions. This provides a basis for emergency plan design and the formulation of emergency rescue and disposal plans, and has strong operability.

[0092] It should be noted that the method of this embodiment can be executed by a single device, such as a computer or server. The method of this embodiment can also be applied in a distributed scenario, where multiple devices cooperate to complete the task. In such a distributed scenario, one of these devices may execute only one or more steps of the method of this embodiment, and the multiple devices will work together to determine the parameters of the air column during the mine water inrush propagation process to complete the method described.

[0093] It should be noted that the above description describes some embodiments of this disclosure. 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 a different order than that shown in the above embodiments and still achieve the desired result. Furthermore, the processes depicted in the drawings do not necessarily require a specific or sequential order to achieve the desired result. In some embodiments, multitasking and parallel processing are also possible or may be advantageous.

[0094] Based on the same technical concept, corresponding to the methods of any of the above embodiments, this disclosure also provides a device for determining the parameters of the air column during the spread of mine water inrush, see [link to relevant documentation]. Figure 12 The device for determining the parameters of the air column during the spread of water inrush in the mine, the device comprising: The acquisition module is used to acquire the topological structure of the mining space in the mine; The preset point module is used to determine the highest point of the enclosed local area and the air connection point based on the topology; An air column region module is used to determine the air column region based on the base plate elevation control area, using the highest point of the enclosed local area and the air connection point; The air column parameter module is used to determine the target parameters of the air column region based on the dynamic equilibrium function of the air column region and the adjacency relationship of the base plate elevation control area.

[0095] For ease of description, the above apparatus is described in terms of its functions, divided into various modules. Of course, in implementing this disclosure, the functions of each module can be implemented in one or more software and / or hardware.

[0096] The apparatus described above is used to implement the method for determining the parameters of the air column during the mine water inrush propagation process in any of the foregoing embodiments, and has the beneficial effects of the corresponding method embodiments, which will not be repeated here.

[0097] Based on the same technical concept, corresponding to the methods of any of the above embodiments, this disclosure also provides a non-transitory computer-readable storage medium storing computer instructions for causing the computer to execute the method for determining the parameters of the air column during the mine water inrush propagation process as described in any of the above embodiments.

[0098] The computer-readable medium of this embodiment includes permanent and non-permanent, removable and non-removable media, and information storage can be implemented by any method or technology. Information can be computer-readable instructions, data structures, program modules, or other data. Examples of computer storage media include, but are not limited to, phase-change memory (PRAM), static random access memory (SRAM), dynamic random access memory (DRAM), other types of random access memory (RAM), read-only memory (ROM), electrically erasable programmable read-only memory (EEPROM), flash memory or other memory technologies, CD-ROM, digital versatile optical disc (DVD) or other optical storage, magnetic tape, magnetic magnetic disk storage or other magnetic storage devices, or any other non-transfer medium that can be used to store information accessible by a computing device.

[0099] The computer instructions stored in the storage medium of the above embodiments are used to cause the computer to execute the method for determining the parameters of the air column during the spread of mine water inrush as described in any of the above embodiments, and have the beneficial effects of the corresponding method embodiments, which will not be repeated here.

[0100] Those skilled in the art should understand that the discussion of any of the above embodiments is merely exemplary and is not intended to imply that the scope of this disclosure (including the claims) is limited to these examples; within the framework of this disclosure, the technical features of the above embodiments or different embodiments can also be combined, the steps can be implemented in any order, and there are many other variations of different aspects of the embodiments of this disclosure as described above, which are not provided in detail for the sake of brevity.

[0101] Additionally, to simplify the description and discussion, and to avoid obscuring the embodiments of this disclosure, the provided drawings may or may not show well-known power / ground connections to integrated circuit (IC) chips and other components. Furthermore, the apparatus may be shown in block diagram form to avoid obscuring the embodiments of this disclosure, and this also takes into account the fact that the details of implementation of these block diagram apparatuses are highly dependent on the platform on which the embodiments of this disclosure will be implemented (i.e., these details should be fully understood by those skilled in the art). While specific details (e.g., circuits) have been set forth to describe exemplary embodiments of this disclosure, it will be apparent to those skilled in the art that the embodiments of this disclosure can be implemented without these specific details or with variations thereof. Therefore, these descriptions should be considered illustrative rather than restrictive.

[0102] Although this disclosure has been described in conjunction with specific embodiments thereof, many substitutions, modifications, and variations of these embodiments will be apparent to those skilled in the art from the foregoing description. For example, other memory architectures (e.g., dynamic RAM (DRAM)) may be used with the embodiments discussed.

[0103] This disclosure is intended to cover all such substitutions, modifications, and variations that fall within the broad scope of the appended claims. Therefore, any omissions, modifications, equivalent substitutions, improvements, etc., made within the spirit and principles of this disclosure should be included within the scope of protection of this disclosure.

Claims

1. A method for determining the parameters of the air column during the propagation of water inrush in a mine, comprising: Obtain the topological structure of the mining space in the mine; Based on the aforementioned topology, the highest point in the enclosed local area and the air connection point are determined; Based on the base plate elevation control area, the air column area is determined by the highest point of the enclosed local area and the air connection point; Based on the dynamic equilibrium function of the air column region and the adjacency relationship of the base plate elevation control area, the target parameters of the air column region are determined.

2. The method according to claim 1, wherein, Based on the aforementioned topology, the highest point in a confined area and the air connectivity point are determined, including: The local highest point is determined based on the topology; The local highest point belonging to the preset type is determined as the closed local highest point; And / or, the air connection point includes a first air connection point and a second air connection point; The node in the topology that is in direct contact with the atmosphere is defined as the first air connectivity point; Based on the first air connection point, a search is performed along the direction of decreasing elevation of the base plate, and the branching points on the search path are determined as the second air connection point.

3. The method according to claim 2, wherein, Based on the first air connectivity point, a search is performed along the direction of decreasing elevation of the base plate, and the branching points on the search path are determined as the second air connectivity points, including: For the current base plate elevation control area where the first air connection point is located, the nodes of the current base plate elevation control area are searched along the direction of the decrease in base plate elevation, and the branching point on the search path is determined as the second air connection point of the current base plate elevation control area; The search is performed along the direction of decreasing base elevation to find the base elevation control area adjacent to the second air connection point. The branching point on the search path is determined as the second air connection point of the adjacent base elevation control area until a local minimum point is reached.

4. The method according to claim 1, wherein, Based on the base plate elevation control zone, the air column region is determined using the highest point of the enclosed local area and the air connection point, including: Determine whether there are any air connections within the base plate elevation control zone where the highest point of the enclosed local area is located; In response to the existence of an air connection point in the base plate elevation control area where the highest point of the sealed local area is located, the maximum elevation point connecting the air connection point and the highest point of the sealed local area is determined. In response to the maximum elevation point being less than the highest point of the enclosed local area, the base plate elevation control area where the highest point of the enclosed local area is located is determined as the air column area.

5. The method according to claim 4, further comprising: In response to the maximum elevation point being greater than or equal to the highest point of the enclosed local area, it is determined that the air column area does not exist in the base plate elevation control zone where the highest point of the enclosed local area is located. or, In response to the absence of an air connection point in the base plate elevation control area where the highest point of the enclosed local area is located, the search continues for adjacent base plate elevation control areas until an air connection point is detected in the base plate elevation control area. The sum of the areas of all the base plate elevation control areas searched starting from the base plate elevation control area where the highest point of the sealed local area is located is determined as the air column area.

6. The method according to claim 1, wherein, Based on the dynamic equilibrium function of the air column region and the adjacency relationship of the base plate elevation control area, the target parameters of the air column region are determined, including: Before the top plate of the local lowest point in the air column region is submerged, the water level on both sides of the local lowest point is the same. After the top plate of the local lowest point in the air column region is submerged, the water level and water accumulation outside the air column region are determined based on the dynamic equilibrium function when the water level in the air column region reaches the bottom plate elevation of the boundary point of each bottom plate elevation control zone.

7. The method according to claim 6, wherein, The dynamic equilibrium function includes: ， in, Where is the density of water, g is the acceleration due to gravity, h2 is the water level on the high-pressure side, h1 is the water level on the low-pressure side, n is the amount of substance in the air, R is the gas constant, T is the thermodynamic temperature of the air, V(h1) is the gas volume in the air column region, V(h1) can be calculated using the mine tunnel dimensions and h1; P0 is the standard atmospheric pressure.

8. A device for determining the parameters of an air column during the spread of water inrush in a mine, comprising: The acquisition module is used to acquire the topological structure of the mining space in the mine; The preset point module is used to determine the highest point of the enclosed local area and the air connection point based on the topology; An air column region module is used to determine the air column region based on the base plate elevation control area, using the highest point of the enclosed local area and the air connection point; The air column parameter module is used to determine the target parameters of the air column region based on the dynamic equilibrium function of the air column region and the adjacency relationship of the base plate elevation control area.

9. An electronic device, comprising a memory, a processor, and a computer program stored in the memory and executable on the processor, wherein the processor executes the computer program to implement the method for determining the parameters of an air column during the spread of water inrush in a mine as described in any one of claims 1 to 7.

10. A non-transitory computer-readable storage medium storing computer instructions for causing the computer to execute the method for determining the parameters of an air column during a mine water inrush propagation process as described in any one of claims 1 to 7.

Images