Mining area water-rich area slope stability analysis method, equipment and medium

Abstract

The invention discloses a mining area water-rich area slope stability analysis method and device and a medium, relates to the field of slope stability, and solves the problem that the slope stability under the water flow permeation effect cannot be effectively analyzed. The method comprises the following steps: analyzing the permeability coefficient of a water-rich layer in a side slope in a mining area according to hydrological characteristics and a geologic structure, collecting cohesive forces and internal friction angles of sample rock soil in the side slope in the mining area under different water contents, obtaining a corresponding relationship between the sample rock soil under different water contents and the cohesive forces and the internal friction angles, and analyzing the infiltration process of rainfall in a rainy season. Calculating a safety coefficient according to the cohesive force and the internal friction angle of the rock-soil strips with different water contents in the side slope in the mining area, and analyzing the stability of the side slope in the water-rich area of the mining area according to the safety coefficient. According to the method, the stability of the slope under the water flow permeation effect is effectively analyzed.

Description

Technical Field

[0001] The present invention belongs to the technical field of slope stability analysis, and specifically relates to a method, device, and medium for analyzing the slope stability in a water-rich area of a mining area. Background Art

[0002] A slope is a geological body with an inclined surface, which is composed of rock and soil masses and may be naturally formed (such as a mountain slope) or artificially excavated (such as a cutting, foundation pit, or mine slope). The core feature of a slope is that it is prone to sliding failure under the influence of factors such as gravity, water, and earthquakes. The stability analysis of slopes is a key point in engineering. Traditional slope stability analysis often uses static models. However, slopes in water-rich areas of mining areas are affected by multiple hydrological factors such as precipitation and groundwater seepage. The existing technology ignores the dynamic risks brought by different soil saturation states caused by water flow penetration during the rainy season. At the same time, traditional methods often assume that slope soil masses are homogeneous materials, ignoring the influence of differences in saturation states in different regions on self-weight, pore water pressure, cohesion, and internal friction angle. For example, the self-weight calculation of partially saturated soil strips does not distinguish the difference in unit weight between the saturated section and the unsaturated section, resulting in a large deviation in the calculation of the safety factor. Therefore, the present invention proposes a method, device, and medium for analyzing the slope stability in a water-rich area of a mining area. Summary of the Invention

[0003] Aiming at the deficiencies of the existing technology, the purpose of the present invention is to provide a method, device, and medium for analyzing the slope stability in a water-rich area of a mining area.

[0004] The technical problems to be solved by the present invention are as follows: How to effectively analyze the stability of slopes under the action of water flow penetration.

[0005] To achieve the above purpose, the present invention adopts the following technical solutions: In the first aspect, a method for analyzing the slope stability in a water-rich area of a mining area is as follows: Step S1, collect the hydrological characteristics and geological structure of the slope in the mining area; Step S2, analyze the permeability coefficient of the water-rich layer inside the slope in the mining area based on the hydrological characteristics and geological structure; Step S3, collect the cohesion and internal friction angle of the sample rock and soil in the slope in the mining area at different water contents, and obtain the corresponding relationship between the sample rock and soil at different water contents and the cohesion and internal friction angle; Step S4, analyze the infiltration process of rainfall during the rainy season, and analyze and obtain the saturation state of the rock and soil strips inside the slope in the water-rich area of the mining area under the rainfall state during the rainy season; Step S5: Calculate the safety factor based on the cohesion and internal friction angle of the rock and soil strips with different water contents in the inner slope of the mining area, and analyze the stability of the slope in the water-rich area of the mining area according to the safety factor.

[0006] Furthermore, the collection process in step S1 is as follows: Step S11: Obtain the slip surface inside the slope, the inclination angle α of the corresponding slip surface, and the water level height of the water-rich layer inside the slope through geological exploration. Step S12: Set up a collection area with a radius of on the slope surface, and set up multiple auxiliary collection points with the center of the collection area as the reference point. Step S13: Collect the hydrogeological characteristics and geological structure of the inner slope in the mining area at the collection area and auxiliary collection points.

[0007] Furthermore, the analysis process of step S2 includes the following sub-steps: Step S21: Obtain the water level heights of the collection area and different auxiliary collection points, and then pump water from the water-rich layer inside the middle slope of the mining area at a fixed flow rate, and collect the real-time water levels of the collection area and different auxiliary collection points at different time nodes at fixed time intervals. Step S22: Subtract the real-time water level from the water level height in the collection area to obtain the water level drawdown in the collection area at the current time node, and subtract the real-time water level from the water level heights of different auxiliary collection points to obtain the water level drawdowns in different auxiliary collection points at the current time node. Step S23: Subtract the water level drawdown in the collection area at the previous time node from the water level drawdown in the collection area at the current time node and take the absolute value to obtain the water level drawdown error between two adjacent time nodes in the collection area. Step S24: If the water level drawdown errors in the collection area at all adjacent time nodes are less than the error threshold, stop pumping water and proceed to the next step. If the water level drawdown error in the collection area at any set of adjacent time nodes is greater than or equal to the error threshold, continue pumping water until the water level drawdown errors in the collection area at all subsequent adjacent time nodes are less than the error threshold.

[0008] Furthermore, the analysis process of step S2 also includes the following sub-steps: Step S25: Obtain the water level drawdowns in the collection area at different time nodes, count the number of time nodes when the water level drawdown in the collection area remains unchanged, traverse and compare the number of time nodes when the water level drawdown in the collection area remains unchanged to obtain the maximum value of the number of time nodes, and record the water level drawdown corresponding to the maximum value of the number of time nodes as the stable water level drawdown. Step S26: When the water level drawdown of the auxiliary collection point is not zero, measure the water level drawdowns of the remaining auxiliary collection points. When the drawdown of the auxiliary collection point is zero, measure the distance from the auxiliary collection point to the center of the collection area and record it as the influence distance; Step S27, traverse and compare all influence distances to obtain the minimum value of the influence distance, record the minimum value of the influence distance as the influence radius, and calculate the permeability coefficient of the water-rich layer; Step S28, compare the permeability coefficient of the water-rich layer with the permeability threshold; If the permeability coefficient of the water-rich layer is less than the permeability threshold, generate a slope anomaly signal; If the permeability coefficient of the water-rich layer is greater than or equal to the permeability threshold, proceed to the next step.

[0009] Furthermore, the collection process in step S3 includes the following sub-steps: Step S31, take samples of the rock and soil in the collection area to obtain cylindrical rock cores and record them as sample rock and soil, place the sample rock and soil in a drying oven for a fixed duration to dry, and measure the dry weight of the sample rock and soil after drying; Step S32, collect the initial cohesion and initial internal friction angle of the sample rock and soil after drying, immerse the sample rock and soil after drying in water, and measure the real-time weight of the sample rock and soil at different time nodes at fixed time intervals; Step S33, subtract the dry weight from the real-time weight of the sample rock and soil after immersion at the current time node and divide by the dry weight to obtain the water content of the sample rock and soil at different time nodes, count the number of time nodes when the water content remains unchanged at different water contents of the sample rock and soil, traverse and compare the number of time nodes when the water content remains unchanged to obtain the maximum value of the number of time nodes, and record the water content corresponding to the maximum value of the number of time nodes as the saturated water content of the rock and soil; Step S34, collect the cohesion and internal friction angle of the sample rock and soil at different water contents, so as to obtain the corresponding relationship between the sample rock and soil and the cohesion and internal friction angle at different water contents.

[0010] Furthermore, the analysis process in step S4 includes the following sub-steps: Step S41, vertically and evenly divide the slope into a fixed number of rock and soil strips with a fixed width along the slip surface; Step S42, collect the initial rainfall time when the rainfall starts and the current rainfall intensity in real time, collect the initial water content of different soil strips, subtract the initial rainfall time from the current time to obtain the rainfall duration, and then calculate the infiltration depth of the rainwater; Step S43, record the distance from the slope in the vertical direction corresponding to the upper end of the soil strip to the bottom of the soil strip as the underground depth of the soil strip, subtract the height of the soil strip from the underground depth and take the absolute value to obtain the depth di of the top of different soil strips from the slope.

[0011] Further, the analysis process in step S4 further includes the following sub-steps: Step S44, if the penetration depth of rainwater is greater than or equal to the underground depth of the soil-rock strip, mark the corresponding soil-rock strip as a saturated soil-rock strip, and record the height of the saturated soil-rock strip as the saturated height; Step S45, if the penetration depth of rainwater is less than the depth from the top of the soil-rock strip to the ground, mark the corresponding soil-rock strip as an unsaturated soil-rock strip, and record the height of the unsaturated soil-rock strip as the unsaturated height; Step S46, if the penetration depth of rainwater is greater than or equal to the depth from the top of the soil-rock strip to the ground and less than the underground depth, mark the corresponding soil-rock strip as a partially saturated soil-rock strip and proceed to the next step: Step S47, calculate the water content of the corresponding soil-rock strip, subtract the depth from the top of the soil-rock strip to the ground from the penetration depth of rainwater to obtain the saturated height of the corresponding soil-rock strip, and subtract the saturated height from the height of the corresponding soil-rock strip to obtain the unsaturated height of the corresponding soil-rock strip.

[0012] Further, the calculation and analysis process in step S5 includes the following sub-steps: Step S51, obtain the cohesion and internal friction angle of different soil-rock strips according to the corresponding relationship between different water contents and the cohesion and internal friction angle of the sample soil-rock in step S34; Step S52, obtain the saturated height and unsaturated height of different soil-rock strips, collect the unit weight of the unsaturated soil-rock strips and the unit weight of the saturated soil-rock strips, and calculate the self-weight of different soil-rock strips; Step S53, then calculate the arc length of the sliding surface at the bottom of different soil-rock strips, multiply the height of different saturated soil-rock strips by the self-weight of water to obtain the pore water pressure at the bottom of the corresponding saturated soil-rock strips; Step S54, calculate the safety factor of the slope; Step S55, compare the safety factor of the slope with the safety factor threshold; If the safety factor of the slope is less than the safety factor threshold, give an early warning; If the safety factor of the slope is greater than or equal to the safety factor threshold, continue monitoring.

[0013] In a second aspect, an electronic device is characterized in that the electronic device includes: A memory storing a computer program; A processor communicatively connected to the memory, and when the computer program is executed by the processor, the method for analyzing the stability of a slope in a water-rich area of a mining area as described above is implemented.

[0014] In a third aspect, a computer-readable storage medium stores a computer program, and is characterized in that when the program is executed by a processor, the method for analyzing the stability of a slope in a water-rich area of a mining area as described above is implemented.

[0015] In summary, due to the adoption of the above technical solutions, the beneficial effects of the present invention are as follows: 1. The present invention first collects the hydrogeological characteristics and geological structure of the inner slope in the mining area, and then analyzes the permeability coefficient of the water-rich layer inside the middle slope in the mining area based on the hydrogeological characteristics and geological structure, realizing the accurate analysis of the permeability coefficient of the water-rich layer inside the middle slope in the mining area.

[0016] 2. The present invention also collects the cohesion and internal friction angle of the sample rock and soil in the middle slope of the mining area under different water contents, and then obtains the corresponding relationship between the sample rock and soil and the cohesion and internal friction angle under different water contents. At the same time, the infiltration process of rainfall in the rainy season is analyzed, and the saturated state of the rock and soil strips inside the slope in the water-rich area of the mining area under the rainy season precipitation state is obtained. Finally, the safety factor is calculated based on the cohesion and internal friction angle of the rock and soil strips with different water contents in the inner slope of the mining area, and the stability of the slope in the water-rich area of the mining area is analyzed based on the safety factor, realizing the accurate analysis of the slope stability under the action of water flow infiltration. BRIEF DESCRIPTION OF THE DRAWINGS

[0017] For the convenience of those skilled in the art to understand, the present invention will be further described below with reference to the accompanying drawings.

[0018] Figure 1 is the method flow chart of the present invention; Figure 2 is the schematic diagram of the collection area in the present invention; Figure 3 is the schematic diagram of the rock and soil strip in the present invention; Figure 4 is the schematic diagram of the electronic structure in the present invention. DETAILED DESCRIPTION OF THE EMBODIMENTS

[0019] The technical solutions of the present invention will be clearly and completely described below in conjunction with the embodiments. Obviously, the described embodiments are only a part of the embodiments of the present invention, rather than all of the embodiments. All other embodiments obtained by those of ordinary skill in the art based on the embodiments of the present invention without creative efforts shall fall within the protection scope of the present invention.

[0020] Embodiment 1: Please refer to Figures 1-3 As shown, the technical solution provided by the present invention is: a method for analyzing the stability of the slope in the water-rich area of the mining area, and the method is as follows: Step S1, collect the hydrogeological characteristics and geological structure of the inner slope in the mining area; Among them, the hydrogeological characteristic is the water level height of the water-rich layer inside the middle slope in the mining area, and the geological structure is the sliding surface inside the middle slope in the mining area and the inclination angle of the corresponding sliding surface; In this embodiment, the collection process in step S1 is as follows: Step S11: Obtain the slip surface inside the slope, the inclination angle α of the corresponding slip surface, and the water level height H of the water-rich layer inside the slope through geological exploration. Herein, the slip surface refers to the potential shear surface where sliding failure may occur inside the slope, that is, the interface along which the landslide slides. Step S12: Refer to Figure 2 As shown, arrange a collection area with a radius of r on the slope surface, and arrange multiple auxiliary collection points with the center of the collection area as the reference point. Herein, the collection area is a circular area, and both the collection area and the auxiliary collection points are in the water-rich layer of the slope inside the mining area. Step S13: Collect the hydrogeological characteristics and geological structure of the slope inside the mining area at the collection area and the auxiliary collection points.

[0021] Step S2: Analyze the permeability coefficient of the water-rich layer inside the slope in the mining area based on the hydrogeological characteristics and geological structure. In this embodiment, the analysis process of step S2 includes the following sub-steps: Step S21: Obtain the water level height H of the collection area and different auxiliary collection points, and then pump water from the water-rich layer inside the slope in the mining area at a fixed flow rate Q, and collect the real-time water levels of the collection area and different auxiliary collection points at different time nodes at fixed time intervals. Exemplarily, the fixed time interval is 1 hour. Step S22: Subtract the real-time water level from the water level height in the collection area to obtain the water level drawdown in the collection area at the current time node, and subtract the real-time water level from the water level height of different auxiliary collection points to obtain the water level drawdown in different auxiliary collection points at the current time node. Step S23: Subtract the water level drawdown in the collection area at the previous time node from the water level drawdown in the collection area at the current time node and take the absolute value to obtain the water level drawdown error between two adjacent time nodes in the collection area. Step S24: If the water level drawdown errors in the collection area at all adjacent time nodes are less than the error threshold, stop pumping water and proceed to the next step. If the water level drawdown error in the collection area at any group of adjacent time nodes is greater than or equal to the error threshold, continue pumping water until the water level drawdown errors in the collection area at all subsequent adjacent time nodes are less than the error threshold. In this embodiment, when the water level drawdown error in the collection area between adjacent time nodes is less than the error threshold, it is considered that the water level drawdown in the collection area between adjacent time nodes is the same. It should be noted that when the water level drawdown errors in the collection area at all adjacent time nodes are less than the error threshold, it indicates that the recharge and pumping of the water-rich layer in the collection area reach a balance state, and then the water level of the water-rich layer in the collection area is regarded as no longer changing and pumping water is stopped. Step S25: Obtain the drawdown of the water level within the collection area at different time nodes, count the number of time nodes when the drawdown of the water level within the collection area remains unchanged, traverse and compare the number of time nodes when the drawdown of the water level within the collection area remains unchanged to obtain the maximum value of the number of time nodes, and record the drawdown corresponding to the maximum value of the number of time nodes as the stable drawdown s of the water level; Step S26: When the drawdown of the water level at the auxiliary collection point is not zero, measure the drawdown of the remaining auxiliary collection points; When the drawdown of the water level at the auxiliary collection point is zero, measure the distance from the auxiliary collection point to the center of the collection area and record it as the influence distance; Step S27: Traverse and compare all influence distances to obtain the minimum value of the influence distance, record the minimum value of the influence distance as the influence radius R, and calculate the permeability coefficient K of the water-rich layer through the formula ; Step S28: Compare the permeability coefficient of the water-rich layer with the permeability threshold; If the permeability coefficient of the water-rich layer is less than the permeability threshold, generate a slope anomaly signal; If the permeability coefficient of the water-rich layer is greater than or equal to the permeability threshold, proceed to the next step; It should be noted that the permeability coefficient of the water-rich layer is used to reflect the water-conducting ability of the pores or fractures in the water-rich layer. The larger the permeability coefficient, the faster the flow of groundwater, and it is easy to form an obvious seepage path. The smaller the permeability coefficient, the slower the flow of groundwater, and it is easy to accumulate in the slope body to form a high water pressure area. In this embodiment, further stability analysis is carried out on the slopes with the permeability coefficient of the water-rich layer greater than or equal to the permeability threshold.

[0022] Step S3: Collect the cohesion and internal friction angle of the sample rock and soil within the slope in the mining area at different water contents, and obtain the corresponding relationship between the sample rock and soil at different water contents and the cohesion and internal friction angle; Among them, the collection process in Step S3 includes the following sub-steps: Step S31: Take samples of the rock and soil within the collection area to obtain cylindrical rock cores and record them as sample rock and soil. Place the sample rock and soil in a drying oven for a fixed period of time, and measure the dry weight of the sample rock and soil after drying; Step S32: Collect the initial cohesion and initial internal friction angle of the sample rock and soil after drying. Immerse the sample rock and soil after drying in water, and measure the real-time weight of the sample rock and soil after immersion at different time nodes at a fixed time interval; It should be noted that the initial cohesion and initial internal friction angle of the sample rock and soil can be collected through a triaxial compression test; Step S33: Subtract the dry weight from the real-time weight of the sample rock and soil after immersion at the current time node, and divide the result by the dry weight to obtain the water content of the sample rock and soil at different time nodes. Count the number of time nodes when the water content remains unchanged at different water contents of the sample rock and soil. Traverse and compare all the numbers of time nodes when the water content remains unchanged to obtain the maximum value of the number of time nodes. Denote the water content corresponding to the maximum value of the number of time nodes as the saturated water content bh of the rock and soil. Step S34: Collect the cohesion and internal friction angle of the sample rock and soil at different water contents, so as to obtain the corresponding relationship between the sample rock and soil and the cohesion and internal friction angle at different water contents.

[0023] Step S4: Analyze the infiltration process of rainfall during the rainy season, and analyze to obtain the saturated state of the rock and soil strips in the water-rich area of the mining area under the rainy season precipitation state. In this embodiment, the analysis process in step S4 includes the following sub-steps: Step S41: Refer to Figure 3 As shown, divide the slope vertically and evenly into a fixed number of rock and soil strips i with a width of b along the sliding surface, where i = 1, 2,..., n, and i is the number of the rock and soil strip. Collect the height hi of different rock and soil strips. Step S42: Collect the initial rainfall time when the rainfall starts and the rainfall intensity q at the current moment in real time. Collect the initial water content csi of different soil strips. Subtract the initial rainfall time from the current time to obtain the rainfall duration t. Calculate the infiltration depth z of the rainwater through the formula z = [K×t×(q - K) / (bh - csi)] + H. Step S43: Denote the distance from the vertical slope corresponding to the upper high end of the rock and soil strip to the bottom of the rock and soil strip as the underground depth of the rock and soil strip. Subtract the height of the rock and soil strip from the underground depth and take the absolute value to obtain the depth di of the top of different rock and soil strips from the slope; where, as Figure 3 shown, the distance between point A and point C is the underground depth of the rock and soil strip, the distance between point B and point C is the height hi of the rock and soil strip, and the distance between point A and point B is the depth of the top from the slope. It should be explained that in this embodiment, the longest side of the rock and soil strip is used as various heights and depths of the rock and soil strip, etc. Step S44: If the infiltration depth of the rainwater is greater than or equal to the underground depth of the rock and soil strip, then mark the corresponding rock and soil strip as a saturated rock and soil strip, and denote the height of the saturated rock and soil strip as the saturated height. Step S45: If the infiltration depth of the rainwater is less than the depth of the top of the rock and soil strip from the slope, then mark the corresponding rock and soil strip as an unsaturated soil strip, and denote the height of the unsaturated rock and soil strip as the unsaturated height. Step S46: If the penetration depth of rainwater is greater than or equal to the depth from the ground surface to the top of the geotechnical strip and less than the underground depth, it indicates that the upper part of the corresponding geotechnical strip is saturated and the lower part is unsaturated. Then, mark the corresponding geotechnical strip as a partially saturated geotechnical strip and proceed to the next step: Step S47: Calculate the water content hsi of the corresponding geotechnical strip using the formula hsi = csi + (z - di) × (bh - csi) / hi. Subtract the depth from the ground surface to the top of the geotechnical strip from the penetration depth of rainwater to obtain the saturated height of the corresponding geotechnical strip, and subtract the saturated height from the height of the corresponding geotechnical strip to obtain the unsaturated height of the corresponding geotechnical strip.

[0024] Step S5: Calculate the safety factor based on the cohesion and internal friction angle of the geotechnical strips with different water contents in the slope within the mining area, and analyze the stability of the slope in the water-rich area of the mining area based on the safety factor; In this embodiment, the calculation and analysis process in Step S5 includes the following sub-steps: Step S51: Obtain the cohesion ci and internal friction angle pi of different geotechnical strips according to the corresponding relationship between different water contents and the cohesion and internal friction angle of the sample geotechnical materials in Step S34; Step S52: Obtain the saturated height hbh and unsaturated height hfb of different geotechnical strips, collect the unit weight zd of the unsaturated geotechnical strips and the unit weight rb of the saturated geotechnical strips, and calculate the self-weight Wi of different geotechnical strips using the formula Wi = zd × b × hfb + rb × b × hbh; Step S53: Calculate the arc length li of the sliding surface at the bottom of different geotechnical strips using the formula li = b / cosa, and multiply the height of different saturated geotechnical strips by the self-weight of water to obtain the pore water pressure ui at the bottom of the corresponding saturated geotechnical strips; It should be noted that in this embodiment, the pore water pressure of the unsaturated geotechnical strips is ignored; specifically, the unit weights of the unsaturated geotechnical strips, saturated geotechnical strips, and water can be obtained through experimental measurements; Step S54: Calculate the safety factor Fs of the slope using the formula ; Step S55: Compare the safety factor of the slope with the safety factor threshold; If the safety factor of the slope is less than the safety factor threshold, it indicates that the stability of the slope is poor, and then give an early warning; If the safety factor of the slope is greater than or equal to the safety factor threshold, it indicates that the stability of the slope is strong, and then continue to monitor.

[0025] In this application, if there are corresponding calculation formulas, the above calculation formulas are all dimensionless and only take their numerical values for calculation. Coefficients such as weight coefficients and proportionality coefficients in the formulas are set to obtain a result value by quantifying each parameter. Regarding the magnitudes of the weight coefficients and proportionality coefficients, as long as the proportional relationship between the parameters and the result value is not affected, it is acceptable.

[0026] Embodiment 2: The embodiment of the present invention further provides an electronic device for running the slope stability analysis method for the water-rich area in the mining area; see Figure 4 the structural schematic diagram of an electronic device provided by the embodiment of the present invention as shown. The electronic device includes a memory and a processor. Among them, the memory is used to store one or more computer instructions, and the one or more computer instructions are executed by the processor to implement the above-mentioned slope stability analysis method for the water-rich area in the mining area; Furthermore, Figure 4 the electronic device as shown further includes a communication bus and a communication interface, and the processor, the communication interface, and the memory are connected through the communication bus; Among them, the memory may include a high-speed random access memory (RAM, Random Access Memory), and may also include a non-volatile memory, such as at least one disk memory. Through at least one communication interface (which can be wired or wireless), a communication connection is established between this system network element and at least one other network element. The Internet, wide area network, local area network, metropolitan area network, etc. can be used. The communication bus can be an ISA bus, a PCI bus, an EISA bus, etc. The communication bus can be divided into an address bus, a data bus, a control bus, etc. For the sake of convenience of representation, Figure 4 only a bidirectional arrow is used to represent it in the figure, but it does not mean that there is only one communication bus or one type of communication bus; A processor may be an integrated circuit chip with the ability to process signals. In the implementation process, each step of the above method can be completed by the integrated logic circuit of the hardware in the processor or the instructions in the form of software. The above-mentioned processor may be a general-purpose processor, including a central processing unit (CPU for short), a network processor (NP for short), etc.; it may also be a digital signal processor (DSP for short), an application specific integrated circuit (ASIC for short), a field-programmable gate array (FPGA for short), or other programmable logic devices, discrete gate or transistor logic devices, discrete hardware components. It can implement or execute various methods, steps, and logic block diagrams disclosed in the embodiments of the present invention. The general-purpose processor may be a microprocessor or the processor may also be any conventional processor, etc. The steps of the method disclosed in combination with the embodiments of the present invention can be directly embodied as being executed and completed by the hardware decoding processor, or executed and completed by a combination of the hardware and software modules in the decoding processor. The software module may be located in a mature storage medium in the art such as a random access memory, a flash memory, a read-only memory, a programmable read-only memory, or an electrically erasable programmable memory, a register, etc. This storage medium is located in the memory, and the processor reads the information in the memory and combines its hardware to complete the steps of the method in the foregoing embodiments.

[0027] Embodiment 3: The embodiments of the present invention also provide a computer storage medium. The computer storage medium stores computer-executable instructions. When the computer-executable instructions are called and executed by a processor, the computer-executable instructions cause the processor to implement the above-mentioned slope stability analysis method in the mining area's water-rich area. For the specific implementation, reference can be made to the method embodiments, and details are not described herein again. The computer program product of the slope stability analysis method in the mining area's water-rich area provided by the embodiments of the present invention includes a computer storage medium storing program codes. The instructions included in the program codes can be used to execute the methods in the foregoing method embodiments. For the specific implementation, reference can be made to the method embodiments, and details are not described herein again.

[0028] Those skilled in the art can clearly understand that for the convenience and brevity of description, the specific working processes of the above-described system and / or device can refer to the corresponding processes in the foregoing method embodiments, and details are not described herein again.

[0029] In addition, in the description of the embodiments of the present invention, unless otherwise clearly specified and limited, the terms "install", "connect", and "couple" should be understood in a broad sense. For example, it may be a fixed connection, a detachable connection, or an integral connection; it may be a mechanical connection or an electrical connection; it may be a direct connection or an indirect connection through an intermediate medium, and it may be the communication inside two components. For those of ordinary skill in the art, the specific meanings of the above terms in the present invention can be understood according to specific situations.

[0030] If the above functions are implemented in the form of software function units and sold or used as independent products, they can be stored in a computer-readable storage medium. Based on such an understanding, the technical solution of the present invention, in essence, or the part that contributes to the prior art, or a part of the technical solution, can be embodied in the form of a software product. The computer software product is stored in a storage medium and includes several instructions for causing a computer device (which may be a personal computer, a server, or a network device, etc.) to execute all or part of the steps of the methods described in the embodiments of the present invention. The aforementioned storage medium includes: various media that can store program codes, such as USB flash drives, mobile hard disks, read-only memories (ROMs), random access memories (RAMs), magnetic disks, or optical discs.

[0031] Finally, it should be noted that the above embodiments are only used to illustrate the technical solutions of the present invention, rather than to limit them; although the present invention has been described in detail with reference to the foregoing embodiments, those of ordinary skill in the art should understand that they can still modify the technical solutions described in the foregoing embodiments, or perform equivalent replacements for some or all of the technical features; and these modifications or replacements do not cause the essence of the corresponding technical solutions to deviate from the scope of the technical solutions of the embodiments of the present invention.

Claims

1. A method for analyzing the slope stability of a water-rich area in a mining area, characterized in that, The method is as follows: Step S1, collect the hydrological characteristics and geological structure of the inner slope of the mining area; Step S2, analyze the permeability coefficient of the water-rich layer inside the middle slope of the mining area based on the hydrological characteristics and geological structure; Step S3, collect the cohesion and internal friction angle of the sample rock and soil in the middle slope of the mining area at different water contents, and obtain the corresponding relationship between the sample rock and soil and the cohesion and internal friction angle at different water contents; Step S4, analyze the infiltration process of rainfall during the rainy season, and analyze the saturation state of the rock and soil strips inside the slope of the water-rich area in the mining area under the rainy season precipitation state; Step S5, calculate the safety factor based on the cohesion and internal friction angle of the rock and soil strips with different water contents in the inner slope of the mining area, and analyze the stability of the slope in the water-rich area of the mining area based on the safety factor.

2. The slope stability analysis method for water-rich areas in mining areas according to claim 1, wherein The collection process in step S1 is as follows: Step S11, obtain the slip surface inside the slope, the inclination angle a of the corresponding slip surface, and the water level height of the water-rich layer inside the slope through geological exploration; Step S12, arrange a collection area with a radius on the slope surface, and arrange multiple auxiliary collection points with the center of the collection area as the reference point; Step S13, collect the hydrological characteristics and geological structure of the inner slope of the mining area at the collection area and auxiliary collection points.

3. The slope stability analysis method for water-rich areas in mining areas according to claim 2, characterized in that, The analysis process of step S2 includes the following sub-steps: Step S21, obtain the water level height of the collection area and different auxiliary collection points, and then pump water from the water-rich layer inside the middle slope of the mining area at a fixed flow rate, and collect the real-time water levels of the collection area and different auxiliary collection points at different time nodes at fixed time intervals; Step S22, subtract the real-time water level from the water level height in the collection area to obtain the water level drawdown in the collection area at the current time node, and subtract the real-time water level from the water level height of different auxiliary collection points to obtain the water level drawdown in different auxiliary collection points at the current time node; Step S23, subtract the water level drawdown in the collection area at the previous time node from the water level drawdown in the collection area at the current time node and take the absolute value to obtain the water level drawdown error between two adjacent time nodes in the collection area; Step S24, if the water level drawdown error in the collection area at all adjacent time nodes is less than the error threshold, stop pumping water and proceed to the next step; If the water level drawdown error in the collection area at any group of adjacent time nodes is greater than or equal to the error threshold, continue pumping water until the water level drawdown error in the collection area at all subsequent adjacent time nodes is less than the error threshold.

4. A method for analyzing the slope stability of a water-rich area in a mining area according to claim 3, characterized in that, The analysis process of step S2 also includes the following sub-steps: Step S25, obtain the water level drawdown in the collection area at different time nodes, count the number of time nodes when the water level drawdown in the collection area remains unchanged, traverse and compare the number of time nodes when the water level drawdown in the collection area remains unchanged to obtain the maximum value of the number of time nodes, and record the water level drawdown corresponding to the maximum value of the number of time nodes as the stable water level drawdown; Step S26, when the water level drawdown of the auxiliary collection point is not zero, measure the water level drawdown of the remaining auxiliary collection points; When the water level drawdown of the auxiliary collection point is zero, measure the distance from the auxiliary collection point to the center of the collection area and record it as the influence distance; Step S27: Traverse and compare all influencing distances to obtain the minimum value of the influencing distance, record the minimum value of the influencing distance as the influencing radius, and calculate the permeability coefficient of the water-rich layer. Step S28: Compare the permeability coefficient of the water-rich layer with the permeability threshold. If the permeability coefficient of the water-rich layer is less than the permeability threshold, generate a slope anomaly signal. If the permeability coefficient of the water-rich layer is greater than or equal to the permeability threshold, proceed to the next step.

5. A method for analyzing the slope stability of a water-rich area in a mining area according to claim 4, characterized in that, The acquisition process in Step S3 includes the following sub-steps: Step S31: Take samples of the rock and soil in the acquisition area to obtain cylindrical rock cores, denoted as sample rock and soil. Place the sample rock and soil in an oven to dry for a fixed duration, and measure the dry weight of the sample rock and soil after drying. Step S32: Collect the initial cohesion and initial internal friction angle of the sample rock and soil after drying. Immerse the sample rock and soil after drying in water, and measure the real-time weight of the sample rock and soil at different time nodes at a fixed time interval. Step S33: Subtract the dry weight from the real-time weight of the sample rock and soil after immersion at the current time node and divide by the dry weight to obtain the water content of the sample rock and soil at different time nodes. Count the number of time nodes when the water content remains unchanged at different water contents of the sample rock and soil. Traverse and compare the number of time nodes when the water content remains unchanged to obtain the maximum value of the number of time nodes. Denote the water content corresponding to the maximum value of the number of time nodes as the saturated water content of the rock and soil. Step S34: Collect the cohesion and internal friction angle of the sample rock and soil at different water contents, so as to obtain the corresponding relationship between the sample rock and soil and the cohesion and internal friction angle at different water contents.

6. The slope stability analysis method for a water-rich area in a mining area according to claim 5, characterized in that The analysis process in Step S4 includes the following sub-steps: Step S41: Vertically and evenly divide the slope along the sliding surface into a fixed number of soil strips with a fixed width. Step S42: Real-time collect the initial rainfall time when the rainfall starts and the rainfall intensity at the current moment. Collect the initial water content of different soil strips. Subtract the initial rainfall time from the current time to obtain the rainfall duration, and then calculate the infiltration depth of the rainwater. Step S43: Denote the distance from the slope in the vertical direction corresponding to the upper end of the soil strip to the bottom of the soil strip as the underground depth of the soil strip. Subtract the height of the soil strip from the underground depth and take the absolute value to obtain the depth di of the top of different soil strips from the slope.

7. A method for analyzing the slope stability of a water-rich area in a mining area according to claim 6, characterized in that, The analysis process in Step S4 also includes the following sub-steps: Step S44: If the infiltration depth of the rainwater is greater than or equal to the underground depth of the soil strip, denote the corresponding soil strip as a saturated soil strip, and denote the height of the saturated soil strip as the saturated height. Step S45: If the infiltration depth of the rainwater is less than the depth of the top of the soil strip from the slope, denote the corresponding soil strip as an unsaturated soil strip, and denote the height of the unsaturated soil strip as the unsaturated height. Step S46: If the infiltration depth of the rainwater is greater than or equal to the depth of the top of the soil strip from the slope and less than the underground depth, denote the corresponding soil strip as a partially saturated soil strip and proceed to the next step: Step S47: Calculate the water content of the corresponding soil strip. Subtract the depth of the top of the soil strip from the infiltration depth of the rainwater to obtain the saturated height of the corresponding soil strip. Subtract the saturated height from the height of the corresponding soil strip to obtain the unsaturated height of the corresponding soil strip.

8. A method for analyzing the slope stability of a water-rich area in a mining area according to claim 7, characterized in that, The calculation and analysis process in step S5 includes the following sub-steps: Step S51: Obtain the cohesion and internal friction angle of different soil-rock strips according to the corresponding relationship between different water contents and the cohesion and internal friction angle of the sample soil-rock in step S34; Step S52: Obtain the saturated height and unsaturated height of different soil-rock strips, collect the unit weight of unsaturated soil-rock strips and the unit weight of saturated soil-rock strips, and calculate the self-weight of different soil-rock strips; Step S53: Then calculate the arc length of the sliding surface at the bottom of different soil-rock strips, multiply the height of different saturated soil-rock strips by the self-weight of water to obtain the pore water pressure at the bottom of the corresponding saturated soil-rock strips; Step S54: Calculate the safety factor of the slope; Step S55: Compare the safety factor of the slope with the safety factor threshold; If the safety factor of the slope is less than the safety factor threshold, give an early warning; If the safety factor of the slope is greater than or equal to the safety factor threshold, continue to monitor.

9. An electronic device, characterized in that, The electronic device includes: A memory storing a computer program; A processor communicatively connected to the memory, and when the computer program is executed by the processor, the method according to any one of claims 1-8 is implemented.

10. A computer-readable storage medium having a computer program stored thereon, characterized in that, When the program is executed by the processor, the method according to any one of claims 1 to 8 is implemented.

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