Method, device and terminal equipment for monitoring development of water-conducting channels

Abstract

The embodiment of the present application relates to the technical field of mine water guide channel monitoring, and provides a water guide channel development condition monitoring method, device and terminal equipment, the water guide channel development condition monitoring method comprises: obtaining microseismic event data in a target monitoring area; determining the floor failure depth of the target monitoring area according to the microseismic event data, and screening microseismic events below the floor failure depth from all microseismic events as to-be-analyzed microseismic events; dividing all to-be-analyzed microseismic events into water guide channel front-end rock mass splitting events and water guide channel internal events; determining the development direction of the water guide channel based on the water guide channel front-end rock mass splitting events, and determining the main position of the water guide channel based on the water guide channel internal events. The present application realizes more accurate identification and monitoring of the development condition of the water guide channel, calculates the time when the water guide channel communicates with the floor failure range based on the monitoring condition, and performs water inrush early warning.

Description

Technical Field

[0001] The present invention relates to the technical field of mine water channel monitoring, and in particular to a method, device and terminal equipment for monitoring the development of a water channel. Background Art

[0002] Coal mine water hazards have always been an important factor restricting the safe and efficient production of coal mines. In existing technologies, mines with complex and extremely complex hydrogeological types threatened by floor limestone water usually use monitoring technologies such as microseismic, microseismic and electrical coupling to establish sudden (seepage, burst) water monitoring and early warning systems.

[0003] Microseismic monitoring technology has been widely adopted in the coal industry for flood prevention and control, but several unresolved issues remain. The most prominent issue is the chaotic distribution of numerous microseismic events during water inrush warnings. This makes it difficult to effectively classify and identify these events, making it difficult to accurately analyze and invert the development of water channels based on these events. This can easily lead to misjudgments of water inrush warnings. Summary of the Invention

[0004] In view of this, embodiments of the present invention provide a method, apparatus, and terminal device for monitoring the development of a water channel, thereby achieving more accurate identification and monitoring of the development of the water channel.

[0005] This method, as the core of mine water hazard microseismic monitoring and early warning technology, improves the accuracy of the technology and is conducive to the further promotion and application of the technology. It has significant economic and social benefits.

[0006] In order to achieve the above object, the present invention adopts the following technical solutions:

[0007] In a first aspect, an embodiment of the present invention provides a method for monitoring the development of a water channel, comprising: obtaining microseismic event data within a target monitoring area; determining the bottom plate damage depth of the target monitoring area based on the microseismic event data, and screening microseismic events located below the bottom plate damage depth among all microseismic events as microseismic events to be analyzed, wherein the microseismic events to be analyzed are used to analyze the development of the water channel; dividing all microseismic events to be analyzed into rock splitting events at the front end of the water channel and events inside the water channel; determining the development direction of the water channel based on the rock splitting events at the front end of the water channel, and determining the main position of the water channel based on the events inside the water channel.

[0008] Based on the first aspect, in some embodiments, the bottom plate damage depth of the target monitoring area is determined based on the microseismic event data, and the microseismic events located below the bottom plate damage depth among all the microseismic events are screened as the microseismic events to be analyzed, including: drawing an envelope line of the microseismic event dense area on the plan view of the target monitoring area based on the microseismic event data, and determining the microseismic event dense area according to the envelope line of the microseismic event dense area; screening the microseismic events located in the microseismic event dense area among all the microseismic events to form a first microseismic event set, and determining the bottom plate damage depth based on the first microseismic event set; screening the microseismic events located below the bottom plate damage depth among all the microseismic events as the microseismic events to be analyzed.

[0009] Based on the first aspect, in some embodiments, the bottom plate damage depth is determined based on the first microseismic event set, including: selecting multiple horizontal planes in an area where microseismic events occur densely; for each horizontal plane, with the horizontal plane as the center, taking the space within a preset distance above and below the horizontal plane as the statistical space, and calculating the number of microseismic events in the statistical space; if the number of microseismic events in the statistical space is less than a preset ratio of the number of microseismic events in the first microseismic event set, then determining that the depth of the horizontal plane is the lower limit of the bottom plate damage depth development; calculating the lower limit of the bottom plate damage depth development for multiple days within a preset period, and determining the lower limit of the bottom plate damage depth development with the largest depth value as the bottom plate damage depth.

[0010] Based on the first aspect, in some embodiments, determining the tensile strength of the rock layer where the microseismic event to be analyzed is located includes: sampling multiple rock layers below the bottom plate failure depth in the target monitoring area, and measuring the tensile strength of each rock layer by direct tensile method, where the tensile strength σ t The calculation formula is:

[0011]

[0012] Where P is the maximum tensile force at the time of failure of the microseismic event to be analyzed, and A is the cross-sectional area of ​​the failure of the microseismic event to be analyzed. The rock layer where the microseismic event to be analyzed is located is determined based on the position coordinates of the microseismic event to be analyzed, and the tensile strength of the rock layer where the microseismic event to be analyzed is determined.

[0013] Based on the first aspect, in some embodiments, determining the source stress release level at the location of the microseismic event to be analyzed includes: calculating the source stress release level at the location through the formula Δσ=μ×Δε, where Δσ is the source stress release level at the location of the microseismic event to be analyzed, μ is the stiffness of the rock mass at the location of the microseismic event to be analyzed, and Δε is the source size and deformation at the location of the microseismic event to be analyzed.

[0014] Based on the first aspect, in some embodiments, the development status of the water channel includes the development direction of the water channel and the main position of the water channel. The development direction of the water channel is determined based on the rock splitting event at the front end of the water channel, and the main position of the water channel is determined based on the internal events of the water channel, including: marking arrows between the two closest rock splitting events at the front end of the water channel according to the occurrence time, and the direction of the arrows points from the first rock splitting event at the front end of the water channel to the later rock splitting event at the front end of the water channel, and determining the development direction of the water channel according to the shear head direction of all arrow markings; marking envelope lines between internal events of the water channel with similar distances, and determining the main position of the water channel according to the location where the envelope lines are concentrated.

[0015] Based on the first aspect, in some embodiments, after determining the development status of the water guiding channel, the above-mentioned water guiding channel development status monitoring also includes: calculating the development speed of the water guiding channel based on the main position of the water guiding channel for multiple consecutive days within a preset period; based on the development speed of the water guiding channel and the distance between the bottom plate damage range of the target monitoring area and the main position of the water guiding channel on the last day of the preset period, calculating the time for the water guiding channel to communicate with the bottom plate damage range of the target monitoring area, and issuing a water inrush warning.

[0016] In the second aspect, an embodiment of the present invention also provides a water channel development monitoring device, including: a data acquisition module, used to obtain microseismic event data in the target monitoring area; an event screening module, used to determine the bottom plate damage depth of the target monitoring area based on the microseismic event data, and screen the microseismic events located below the bottom plate damage depth in all microseismic events as microseismic events to be analyzed, wherein the microseismic events to be analyzed are used to analyze the development of the water channel; an event classification module, which divides all microseismic events to be analyzed into rock splitting events at the front end of the water channel and events inside the water channel; a development situation judgment module, the development situation of the water channel includes the development direction of the water channel and the main position of the water channel, the development direction of the water channel is determined based on the rock splitting events at the front end of the water channel, and the main position of the water channel is determined based on the events inside the water channel.

[0017] In a third aspect, an embodiment of the present invention provides a terminal device comprising a memory, a processor, and a computer program stored in the memory and executable on the processor. When the processor executes the computer program, the steps of the method for monitoring the development of a water channel as described in any one of the first aspects above are implemented.

[0018] In an embodiment of the present invention, microseismic events are scientifically and effectively classified and identified, so that the bottom plate damage depth is determined based on the classified microseismic events, and then the development trend of the water channel is inferred based on the bottom plate damage depth and the classified microseismic events, thereby achieving more accurate identification and monitoring of the development of the water channel. BRIEF DESCRIPTION OF THE DRAWINGS

[0019] In order to more clearly illustrate the technical solutions in the embodiments of the present invention, the following briefly introduces the drawings required for use in the embodiments or the description of the prior art. Obviously, the drawings described below are only some embodiments of the present invention. For ordinary technicians in this field, other drawings can be obtained based on these drawings without paying any creative work.

[0020] Figure 1 This is a flow chart of a method for monitoring the development of a water channel provided by an embodiment of the present invention;

[0021] Figure 2 This is a schematic diagram of a microseismic event intensive area provided by an embodiment of the present invention;

[0022] Figure 3 Schematic diagram of microseismic events within and below the base plate damage range provided by an embodiment of the present invention;

[0023] Figure 4 This is a diagram showing arrows and envelope lines of a water channel provided by an embodiment of the present invention;

[0024] Figure 5 This is a schematic diagram of the development direction and main body position of the water channel provided by an embodiment of the present invention;

[0025] Figure 6 This is a structural diagram of a water channel development monitoring device provided by an embodiment of the present invention;

[0026] Figure 7 It is a schematic diagram of a terminal device provided by an embodiment of the present invention. DETAILED DESCRIPTION

[0027] The present invention will be described more clearly below in conjunction with specific embodiments. The following embodiments will help those skilled in the art to further understand the effects of the present invention, but are not intended to limit the present invention in any form. It should be noted that, for those skilled in the art, several variations and improvements can be made without departing from the scope of the present invention, and these all fall within the scope of protection of the present invention.

[0028] In order to make the purpose, technical solutions and advantages of this application clearer, specific embodiments will be described below with reference to the accompanying drawings.

[0029] Coal mine water hazards have always been an important factor restricting the safe and efficient production of coal mines. In existing technologies, mines with complex and extremely complex hydrogeological types threatened by floor limestone water usually use monitoring technologies such as microseismic, microseismic and electrical coupling to establish sudden (seepage, burst) water monitoring and early warning systems.

[0030] Microseismic monitoring technology has been widely adopted in the coal industry for flood prevention and control, but several unresolved issues remain. The most prominent issue is the chaotic distribution of numerous microseismic events during water inrush warnings. This makes it difficult to effectively classify and identify these events, making it difficult to accurately analyze and invert the development of water channels based on these events. This can easily lead to misjudgments of water inrush warnings.

[0031] In view of the above problems, the present invention provides a method for monitoring the development of water channels, such as Figure 1 As shown, it includes steps 101 to 104.

[0032] Step 101: Acquire microseismic event data within a target monitoring area.

[0033] In some embodiments, a microseismic monitoring system may be constructed around the target monitoring area to collect, process, and export microseismic event data.

[0034] Step 102: Determine the floor failure depth of the target monitoring area based on the microseismic event data, and select microseismic events below the floor failure depth from all microseismic events as microseismic events to be analyzed. The microseismic events to be analyzed are used to analyze the development of the water channel.

[0035] like Figure 2 As shown, the roadway is a tunnel dug during the coal exploration and mining process for workers and equipment to pass through. Figure 2 For a plan view, two parallel tunnels are drilled at a certain depth below the ground, called the upper tunnel and the lower tunnel. Observation points of the microseismic monitoring system are arranged along the tunnels, and are marked with numbers followed by well numbers, such as "22#". Figure 2 During coal mining operations, the upper and lower lanes are first connected. This connecting lane, perpendicular to the two parallel lanes, is the working face, and equipment is transported to the working face for coal mining.

[0036] Based on the microseismic event data, the envelope of the microseismic event intensive area is determined on the plane map of the target monitoring area. Figure 2 The area defined by the envelope of the microseismic event intensive area is shown in FIG. , which is the area where microseismic events are intensively occurring.

[0037] The microseismic events located in the microseismic event intensive area are screened from all the microseismic events to form a first microseismic event set, and the bottom plate damage depth is determined based on the first microseismic event set.

[0038] In some embodiments, a plurality of horizontal planes are first selected in the dense area of microseismic events. For each horizontal plane, a statistical space is selected as the space within a preset distance above and below the horizontal plane, for example, the space within 5m above and below the horizontal plane is selected as the statistical space, and the number of microseismic events in the statistical space is calculated.

[0039] If the number of microseismic events in the statistical space is less than a preset proportion of the number of microseismic events in the first microseismic event set, for example, when the number of microseismic events in the statistical space is less than 10% of the number of microseismic events in the first microseismic event set, it is determined that the depth of the horizontal plane is the lower limit of the floor failure depth development.

[0040] The lower limit of the floor failure depth development in multiple days within a preset period is calculated, for example, the lower limit of the floor failure depth development in consecutive 7 days is calculated, and the lower limit of the floor failure depth development with the largest depth value is determined as the floor failure depth, and the floor failure depth above is the floor failure zone. For example, Figure 3 (a) and (b) show, Figure 3 All microseismic events are shown in (a), and the projection of the floor failure range in the vertical section is shown in (b).

[0041] The microseismic events located below the floor failure depth in all microseismic events are screened as the microseismic events to be analyzed. Figure 3 The microseismic events located below the floor failure depth after screening are shown in (b), and the microseismic events to be analyzed are shown in (c). Figure 3 The microseismic events in (b) are used as the microseismic events to be analyzed.

[0042] Step 103: All microseismic events to be analyzed are divided into water channel front rock splitting events and water channel internal events.

[0043] For each microseismic event to be analyzed, the tensile strength of the rock layer where the microseismic event to be analyzed is located and the stress release level of the seismic source at the location need to be determined.

[0044] In some embodiments, before determining the tensile strength of the rock layer where the microseismic event to be analyzed is located, each rock layer segment below the floor failure depth in the target monitoring area needs to be sampled, and the tensile strength of each rock layer is determined by direct tension method, wherein the tensile strength σ t The calculation formula is as follows:

[0045]

[0046] Wherein, P is the maximum tension when the microseismic event to be analyzed is damaged, and A is the damage cross-sectional area of the microseismic event to be analyzed.

[0047] After obtaining the tensile strength of multiple rock layers, the rock layer where the microseismic event to be analyzed is located is determined based on the position coordinates of the microseismic event to be analyzed, and the tensile strength of the rock layer where the microseismic event to be analyzed is queried from the tensile strengths of multiple rock layers.

[0048] The source stress release level (also called stress drop) at the location of the microseismic event to be analyzed is calculated using the formula Δσ = μ × Δε, where Δσ is the source stress release level at the location of the microseismic event to be analyzed, μ is the stiffness of the rock mass at the location of the microseismic event to be analyzed, and Δε is the source size and deformation at the location of the microseismic event to be analyzed.

[0049] In some embodiments, the calculation formula for stress drop is embedded in the above-mentioned microseismic monitoring system, and the microseismic event data derived by the above-mentioned microseismic monitoring system includes the location of the microseismic event and the stress drop.

[0050] Compare the tensile strength of the rock formation where the microseismic event to be analyzed is located with the level of stress release of the earthquake source at that location. If the tensile strength of the rock formation is greater than the level of stress release of the earthquake source at that location, the microseismic event to be analyzed is determined to be an event inside the water channel. If the tensile strength of the rock formation is less than the level of stress release of the earthquake source at that location, the microseismic event to be analyzed is determined to be a rock splitting event at the front end of the water channel.

[0051] Step 104: The development of the water channel includes the development direction of the water channel and the main position of the water channel. The development direction of the water channel is determined based on the rock splitting event at the front end of the water channel, and the main position of the water channel is determined based on the internal events of the water channel.

[0052] An aquifer is a saturated layer below the soil aeration layer, in which the pores of the medium are completely filled with water. The location of the water channel is related to the location of the aquifer, generally forming a water channel through upward cracks in the aquifer. Aquifers are divided into water-rich aquifers and weakly water-rich aquifers. Weakly water-rich aquifers pose a minimal threat of water inrush and are not considered. Only water-rich aquifers are considered when issuing water inrush risk warnings. When a water-rich aquifer is connected to the damaged area of ​​the bottom plate through a water channel, a water inrush can occur. This is the key to flood hazard monitoring and early warning. If the water channel develops between aquifers until the two aquifers are connected, there is a potential for further water inrush and this should also be considered.

[0053] In some embodiments, as Figure 4 As shown in the figure, according to the occurrence time, arrows are marked between the two closest water channel front rock splitting events, and the direction of the arrows points from the first water channel front rock splitting event to the later water channel front rock splitting event, as shown in the figure. Figure 5 As shown, those skilled in the art can determine the development direction of the water channel according to the shear head directions indicated by all arrows.

[0054] like Figure 4 As shown in , the envelope lines are marked between events with similar distances, such as Figure 5 As shown, the main body position of the water guide channel is determined according to the position where the envelope line is concentrated.

[0055] After determining the development of the water channel, the water channel development monitoring method further includes steps 201 and 202:

[0056] Step 201: Calculate the growth rate of the water-conducting channel according to the main body position of the water-conducting channel for a plurality of consecutive days within a preset period.

[0057] In some embodiments, the main body position of the water channel is plotted every day for seven days, and the growth rate V of the water channel is calculated based on the changing relationship of the main body position of the water channel within seven days.

[0058] Step 202: Based on the growth rate of the water channel and the distance between the bottom plate damage range of the target monitoring area and the main position of the water channel on the last day of the preset period, the time for the water channel to communicate with the bottom plate damage range of the target monitoring area is calculated to issue a water inrush warning.

[0059] The projection of the bottom plate damage range on the plane (such as Figure 2 ) and the projection on the cross-section (as shown in Figure 3 The bottom plate damage range is indicated by the distance S between the main position of the water guide channel and the bottom plate damage range, and the time T for the water guide channel to communicate with the bottom plate damage range of the target monitoring area is calculated. T=S / V, and a water inrush warning is issued. The content of the water inrush warning is the time for the water guide channel to communicate with the bottom plate damage range. When the bottom plate damage range and the water guide channel communicate, it will cause a water inrush hazard in the mine.

[0060] The water channel development monitoring method provided by this invention can scientifically and effectively classify and identify microseismic events, calculate the depth of floor damage, and accurately infer the development of water channels. By determining the development trend of water channels, it can provide scientific monitoring and early warning for mine water inrush, improving the accuracy of mine water inrush warnings.

[0061] See also Figure 6 An embodiment of the present invention provides a water channel development monitoring device 60 , comprising: a data acquisition module 610 , an event screening module 620 , an event classification module 630 and a development status judgment module 640 .

[0062] The data acquisition module 610 is used to acquire microseismic event data within the target monitoring area.

[0063] The event screening module 620 is used to determine the bottom plate damage depth of the target monitoring area based on the microseismic event data, and screen the microseismic events located below the bottom plate damage depth among all the microseismic events as the microseismic events to be analyzed, wherein the microseismic events to be analyzed are used to analyze the development of the water channel.

[0064] The event classification module 630 divides all the microseismic events to be analyzed into rock splitting events at the front end of the water channel and events inside the water channel.

[0065] The development status judgment module 640 determines the development status of the water channel, including the development direction of the water channel and the main position of the water channel. The development direction of the water channel is determined based on the rock splitting event at the front end of the water channel, and the main position of the water channel is determined based on the internal events of the water channel.

[0066] Figure 7 FIG. 1 is a schematic diagram of a terminal device provided by an embodiment of the present invention. Figure 7 As shown, the terminal device 7 of this embodiment includes: a processor 70, a memory 71, and a computer program 72 stored in the memory 71 and executable on the processor 70, such as a water channel development monitoring program. When the processor 70 executes the computer program 72, the steps of the above-mentioned water channel development monitoring method embodiment are implemented, such as Figure 1 Alternatively, when the processor 70 executes the computer program 72, the functions of the modules / units in the above-mentioned device embodiments are realized, for example, Figure 6 Functions of modules 610 to 660 are shown.

[0067] Exemplarily, the computer program 72 can be divided into one or more modules / units, which are stored in the memory 71 and executed by the processor 70 to implement the present invention. The one or more modules / units can be a series of computer program instruction segments capable of performing specific functions, which describe the execution process of the computer program 72 in the terminal device 7. For example, the computer program 72 can be divided into a data acquisition module, an event screening module, an event classification module, and a developmental status determination module.

[0068] The terminal device 7 can be a computing device such as a desktop computer, a notebook, a PDA, a cloud server, etc. The terminal device can include, but is not limited to, a processor 70 and a memory 71. It can be understood by those skilled in the art that Figure 7 It is only an example of the terminal device 7 and does not constitute a limitation on the terminal device 7. It may include more or fewer components than shown in the figure, or a combination of certain components, or different components. For example, the terminal device may also include input and output devices, network access devices, buses, etc.

[0069] The processor 70 may be a central processing unit (CPU), other general-purpose processors, digital signal processors (DSP), application-specific integrated circuits (ASIC), field-programmable gate arrays (FPGA), other programmable logic devices, discrete gate or transistor logic devices, discrete hardware components, etc. The general-purpose processor may be a microprocessor or any conventional processor.

[0070] The memory 71 may be an internal storage unit of the terminal device 7, such as a hard disk or memory of the terminal device 7. The memory 71 may also be an external storage device of the terminal device 7, such as a plug-in hard disk, a SmartMediaCard (SMC), a SecureDigital (SD) card, a FlashCard, etc. equipped on the terminal device 7. Furthermore, the memory 71 may include both an internal storage unit of the terminal device 7 and an external storage device. The memory 71 is used to store the computer program and other programs and data required by the terminal device. The memory 71 may also be used to temporarily store data that has been output or is about to be output.

[0071] Those skilled in the art can clearly understand that, for the convenience and brevity of description, only the division of the above-mentioned functional units and modules is used as an example for illustration. In actual applications, the above-mentioned functions can be distributed and completed by different functional units and modules as needed, that is, the internal structure of the device can be divided into different functional units or modules to complete all or part of the functions described above. The functional units and modules in the embodiment can be integrated into one processing unit, or each unit can exist physically alone, or two or more units can be integrated into one unit. The above-mentioned integrated unit can be implemented in the form of hardware or in the form of software functional units. In addition, the specific names of the functional units and modules are only for the convenience of distinguishing each other, and are not used to limit the scope of protection of the present invention. The specific working process of the units and modules in the above-mentioned system can refer to the corresponding process in the aforementioned method embodiment, and will not be repeated here.

[0072] In the above embodiments, the description of each embodiment has its own focus. For parts that are not described or recorded in detail in a certain embodiment, reference can be made to the relevant description of other embodiments.

[0073] Those skilled in the art will appreciate that the units and algorithm steps of each example described in conjunction with the embodiments disclosed herein can be implemented in electronic hardware, or a combination of computer software and electronic hardware. Whether these functions are performed in hardware or software depends on the specific application and design constraints of the technical solution. Professionals and technicians can use different methods to implement the described functions for each specific application, but such implementation should not be considered beyond the scope of the present invention.

[0074] In the embodiments provided by the present invention, it should be understood that the disclosed devices / terminal equipment and methods can be implemented in other ways. For example, the device / terminal equipment embodiments described above are merely illustrative. For example, the division of the modules or units is merely a logical function division. In actual implementation, there may be other division methods, such as multiple units or components can be combined or integrated into another system, or some features can be ignored or not executed. Another point is that the mutual coupling or direct coupling or communication connection shown or discussed can be through some interfaces, indirect coupling or communication connection of devices or units, which can be electrical, mechanical or other forms.

[0075] The units described as separate components may or may not be physically separate, and the components shown as units may or may not be physical units, that is, they may be located in one place or distributed across multiple network units. Some or all of these units may be selected to achieve the purpose of this embodiment according to actual needs.

[0076] In addition, the functional units in the various embodiments of the present invention may be integrated into a single processing unit, each unit may exist physically separately, or two or more units may be integrated into a single unit. The aforementioned integrated units may be implemented in the form of hardware or software functional units.

[0077] If the integrated module / unit is implemented in the form of a software functional unit and sold or used as an independent product, it can be stored in a computer-readable storage medium. Based on this understanding, the present invention implements all or part of the process in the above-mentioned embodiment method, and can also be completed by instructing the relevant hardware through a computer program. The computer program can be stored in a computer-readable storage medium. When the computer program is executed by a processor, it can implement the steps of the above-mentioned various method embodiments. Among them, the computer program includes computer program code, and the computer program code can be in source code form, object code form, executable file or some intermediate form. The computer-readable medium may include: any entity or device capable of carrying the computer program code, recording medium, USB flash drive, mobile hard disk, magnetic disk, optical disk, computer memory, read-only memory (ROM), random access memory (RAM), electric carrier signal, telecommunication signal and software distribution medium. It should be noted that the content contained in the computer-readable medium can be appropriately increased or decreased according to the requirements of legislation and patent practice in the jurisdiction. For example, in some jurisdictions, according to legislation and patent practice, computer-readable media do not include electric carrier signals and telecommunication signals.

[0078] The embodiments described above are only used to illustrate the technical solutions of the present invention, rather than to limit the same. Although the present invention has been described in detail with reference to the aforementioned embodiments, those skilled in the art should understand that they can still modify the technical solutions described in the aforementioned embodiments, or make equivalent replacements for some of the technical features therein. These modifications or replacements do not deviate the essence of the corresponding technical solutions from the spirit and scope of the technical solutions of the various embodiments of the present invention, and should all be included in the scope of protection of the present invention.

Claims

1. A method for monitoring the development of a water channel, characterized in that: include: Acquire microseismic event data within the target monitoring area; Determining the floor failure depth of the target monitoring area based on the microseismic event data, and screening microseismic events below the floor failure depth from all microseismic events as microseismic events to be analyzed, wherein the microseismic events to be analyzed are used to analyze the development of the water channel; All the microseismic events to be analyzed are divided into rock splitting events at the front end of the water channel and events inside the water channel; the development of the water channel includes the development direction of the water channel and the main position of the water channel; Determining the development direction of the water channel based on the rock splitting event at the front end of the water channel, and determining the main position of the water channel based on the internal event of the water channel; The microseismic events to be analyzed are divided into rock splitting events at the front end of the water channel and events inside the water channel, including: For each microseismic event to be analyzed: Determining the tensile strength of the rock formation where the microseismic event to be analyzed is located; Determining the source stress release level at the location of the microseismic event to be analyzed; Compare the tensile strength of the rock formation where the microseismic event to be analyzed is located with the level of earthquake source stress release at the location. If the tensile strength of the rock formation is greater than the level of earthquake source stress release at the location, the microseismic event to be analyzed is determined to be an event inside the water channel. If the tensile strength of the rock formation is less than the level of earthquake source stress release at the location, the microseismic event to be analyzed is determined to be a rock splitting event at the front end of the water channel.

2. The method for monitoring the development of a water channel according to claim 1, wherein: The method of determining the floor failure depth of the target monitoring area based on the microseismic event data and screening microseismic events located below the floor failure depth from all microseismic events as microseismic events to be analyzed includes: Based on the microseismic event data, an envelope of a microseismic event-intensive area is determined on a plan view of the target monitoring area, and a microseismic event-intensive area is determined according to the envelope of the microseismic event-intensive area; screening all microseismic events located in the microseismic event intensive area to form a first microseismic event set, and determining the bottom plate failure depth based on the first microseismic event set; Microseismic events located below the bottom plate failure depth among all microseismic events are screened as microseismic events to be analyzed.

3. The method for monitoring the development of a water channel according to claim 2, wherein: The determining of the bottom plate failure depth based on the first microseismic event set includes: Select multiple horizontal planes in the microseismic event densely occurring area; For each horizontal plane, with the horizontal plane as the center, the space within a preset distance above and below the horizontal plane is used as the statistical space, and the number of microseismic events in the statistical space is calculated; If the number of microseismic events in the statistical space is less than a preset ratio of the number of microseismic events in the first microseismic event set, the depth of the horizontal plane is determined to be the lower limit of the depth of floor damage; The lower limit of the bottom plate damage depth development for multiple days within a preset period is calculated, and the lower limit of the bottom plate damage depth development with the largest depth value is determined as the bottom plate damage depth.

4. The method for monitoring the development of a water channel according to claim 1, wherein: Determining the tensile strength of the rock formation where the microseismic event to be analyzed is located includes: Samples were taken from multiple rock layers below the bottom plate failure depth in the target monitoring area, and the tensile strength of each rock layer was measured by direct tensile method. The calculation formula is: in, P is the maximum tensile force during the destruction of the microseismic event to be analyzed, A is the damage cross-sectional area of ​​the microseismic event to be analyzed; The rock layer where the microseismic event to be analyzed is located is determined based on the position coordinates of the microseismic event to be analyzed, and the tensile strength of the rock layer where the microseismic event to be analyzed is determined.

5. The method for monitoring the development of a water channel according to claim 1, wherein: Determining the source stress release level at the location of the microseismic event to be analyzed includes: By formula Calculate the stress release level of the earthquake source at the location, where is the stress release level of the source at the location of the microseismic event to be analyzed, is the stiffness of the rock mass at the location of the microseismic event to be analyzed, is the source size and deformation of the microseismic event to be analyzed.

6. The method for monitoring the development of a water channel according to claim 1, wherein: The development of the water channel includes the development direction of the water channel and the main position of the water channel. The development direction of the water channel is determined based on the rock splitting event at the front end of the water channel, and the main position of the water channel is determined based on the internal event of the water channel, including: According to the occurrence time, an arrow is marked between two closest water channel front end rock splitting events, and the direction of the arrow is from the first water channel front end rock splitting event to the later water channel front end rock splitting event; Determine the development direction of the water channel according to the direction of the shear head indicated by all arrows; Envelope lines are marked between events within the water channel that are close in distance, and the main position of the water channel is determined according to the position where the envelope lines are concentrated.

7. The method for monitoring the development of a water channel according to any one of claims 1 to 6, characterized in that: After determining the development of the water channel, the method further includes: Calculating the growth rate of the water channel based on the main body position of the water channel for multiple consecutive days within a preset period; Based on the development speed of the water channel and the distance between the bottom plate damage range of the target monitoring area and the main position of the water channel on the last day of the preset period, the time for the water channel to communicate with the bottom plate damage range of the target monitoring area is calculated to issue a water inrush warning.

8. A device for monitoring the development of a water channel, characterized in that: include: A data acquisition module is used to obtain microseismic event data within the target monitoring area; an event screening module, configured to determine the floor failure depth of the target monitoring area based on the microseismic event data, and screen microseismic events located below the floor failure depth from all microseismic events as microseismic events to be analyzed, wherein the microseismic events to be analyzed are used to analyze the development of the water channel; The event classification module divides all microseismic events to be analyzed into rock splitting events at the front end of the water channel and events inside the water channel; The event classification module is specifically configured to, for each microseismic event to be analyzed: determine the tensile strength of the rock formation where the microseismic event to be analyzed is located; determine the source stress release level at the location where the microseismic event to be analyzed is located; compare the tensile strength of the rock formation where the microseismic event to be analyzed is located with the source stress release level at the location; if the tensile strength of the rock formation is greater than the source stress release level at the location, determine that the microseismic event to be analyzed is an event inside the water channel; if the tensile strength of the rock formation is less than the source stress release level at the location, determine that the microseismic event to be analyzed is a rock splitting event at the front end of the water channel; A development status judgment module, wherein the development status of the water channel includes the development direction of the water channel and the main position of the water channel. The development direction of the water channel is determined based on the rock splitting event at the front end of the water channel, and the main position of the water channel is determined based on the internal event of the water channel.

9. A terminal device comprising a memory and a processor and a computer program stored in the memory and executable on the processor, characterized in that: When the processor executes the computer program, the steps of the method for monitoring the development of a water channel according to any one of claims 1 to 7 are implemented.

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