A coal mine goaf water storage suitability geological evaluation method and system

Abstract

The application discloses a coal mine goaf water storage suitability geological evaluation method and system, comprising: collecting geological structure distribution data, coal seam thickness data and hydrological characteristic data of a coal mine goaf; determining crack characteristic evaluation data of the coal mine goaf according to determination of propagation speed of longitudinal waves in propagation of the coal mine goaf; determining a ground stress intensity ratio of the coal mine goaf according to the crack characteristic evaluation data; determining a water storage suitability score value of the coal mine goaf according to the determined geological structure distribution data, crack characteristic evaluation data, coal seam thickness data, hydrological characteristic data and ground stress intensity ratio, and determining a water storage suitability condition of the coal mine goaf according to the determined water storage suitability score value. Through systematic data collection and analysis, the application realizes accurate evaluation of the water storage suitability of the goaf, reduces uncertainty caused by a traditional method, and improves evaluation reliability.

Description

Technical Field

[0001] This application pertains to the field of coal mine water storage, specifically relating to a geological evaluation method, system, equipment, and storage medium for the suitability of water storage in coal mine goaf areas. Background Technology

[0002] Water scarcity is a key factor restricting the high-quality development of the coal industry. Meanwhile, the mining process generates large amounts of mine water, which, if not properly utilized, not only leads to resource waste but may also cause ecological damage. To improve water resource utilization and reduce the ecological impact of mining areas, studying the suitability of water storage in coal mine goafs has become an important technical direction for solving the water shortage problem. Due to their naturally formed fractured rock structure, coal mine goafs offer the possibility of constructing underground water storage spaces.

[0003] Currently, methods for evaluating the suitability of coal mine goaf water storage include considering factors such as the distribution of mining-induced fractures, the morphology of rock strata collapse, or the permeability characteristics of mine water. These methods typically employ traditional geological mapping, mine water inflow monitoring, or rock mass structure investigation techniques to obtain geological information about the coal mine goaf and then conduct suitability assessments based on experience or simple statistical models.

[0004] However, due to the complex geological conditions in coal mine goaf areas, traditional water storage suitability assessment methods have significant uncertainties. Summary of the Invention

[0005] This application aims to provide a geological evaluation method, system, equipment, and storage medium for water storage suitability in coal mine goaf areas, at least addressing the problem of high uncertainty in water storage suitability assessment methods.

[0006] In a first aspect, embodiments of this application disclose a geological evaluation method for the suitability of water storage in coal mine goaf areas, including:

[0007] Collect geological structure distribution data, coal seam thickness data, and hydrological characteristic data of coal mine goaf areas;

[0008] Based on the measurement of the propagation speed of longitudinal waves in the coal mine goaf, the fracture characteristic assessment data of the coal mine goaf are determined.

[0009] The ground stress intensity ratio of the coal mine goaf is determined based on the fracture characteristic evaluation data.

[0010] Based on the determined geological structure distribution data, fracture characteristic assessment data, coal seam thickness data, hydrological characteristic data, and geostress intensity ratio, a water storage suitability score for the coal mine goaf is determined, and the water storage suitability status of the coal mine goaf is determined based on the determined water storage suitability score.

[0011] Secondly, this application also discloses a geological evaluation system for the suitability of water storage in coal mine goaf areas, comprising:

[0012] Data acquisition device, testing and evaluation device, and suitability assessment device;

[0013] The data acquisition device is used to collect geological structure distribution data, coal seam thickness data, and hydrological characteristic data of coal mine goaf areas.

[0014] The testing and evaluation device is used to determine the fracture characteristic evaluation data of the coal mine goaf based on the measurement of the propagation speed of longitudinal waves when they propagate in the coal mine goaf.

[0015] The suitability assessment device is used to determine the geostress intensity ratio of the coal mine goaf based on the fracture characteristic assessment data, and to determine the water storage suitability score of the coal mine goaf based on the determined geological structure distribution data, the fracture characteristic assessment data, the coal seam thickness data, the hydrological characteristic data, and the geostress intensity ratio, and to determine the water storage suitability status of the coal mine goaf based on the determined water storage suitability score.

[0016] Thirdly, embodiments of this application also disclose an electronic device, including a processor and a memory, wherein the memory stores a program or instructions that can run on the processor, and the program or instructions, when executed by the processor, implement the steps of the method described in the first aspect.

[0017] Fourthly, embodiments of this application also disclose a readable storage medium storing a program or instructions that, when executed by a processor, implement the steps of the method described in the first aspect.

[0018] In summary, this embodiment of the application first collects geological structure distribution data, coal seam thickness data, and hydrological characteristic data of the coal mine goaf, and then accurately determines fracture characteristic assessment data by measuring the propagation velocity of P-waves in the coal mine goaf. This provides a more scientific method for fracture characteristic determination than traditional empirical analysis, effectively quantifies the permeability and stability of coal and rock mass fractures, provides a solid data foundation for the accurate calculation of goaf water storage suitability, and avoids the one-sidedness caused by considering only a single or a few geological factors in traditional methods. It also reduces errors caused by human experience judgment and enhances the repeatability and reliability of suitability evaluation. Then, based on the fracture characteristic assessment data... By determining the geostress intensity ratio of the goaf, a more comprehensive assessment of the structural stability of the goaf water storage space is achieved, thereby reducing the risk of deformation or instability of the goaf water storage space. Finally, by combining geological structure distribution data, fracture characteristic assessment data, coal seam thickness data, hydrological characteristic data, and the geostress intensity ratio, a water storage suitability score for the goaf is determined, achieving a more comprehensive and scientific evaluation of goaf water storage suitability. This reduces the uncertainty of the evaluation results, makes the water storage suitability assessment more standardized across different mining areas, and improves the generalizability and applicability of the assessment, thus providing guidance for optimizing the site selection and construction strategies of water storage spaces. This technological breakthrough avoids the unreasonable site selection problems that may be caused by traditional assessment methods, improves the utilization efficiency of mine water resources, and effectively reduces environmental impact. Therefore, based on the method of this application embodiment, through systematic data collection and analysis, a precise assessment of the water storage suitability of goafs is achieved, reducing the uncertainty brought by traditional methods and improving the reliability of the evaluation results, providing more reliable technical support for the sustainable development of the coal mining industry. Attached Figure Description

[0019] In the attached diagram:

[0020] Figure 1 This is a flowchart of the steps in a geological evaluation method for water storage suitability in coal mine goaf, provided in an embodiment of this application.

[0021] Figure 2 This is a flowchart of another method for geological evaluation of water suitability in coal mine goaf, provided in an embodiment of this application.

[0022] Figure 3 This is a block diagram of a geological evaluation system for the suitability of water storage in coal mine goaf, provided in an embodiment of this application.

[0023] Figure 4 This is a block diagram of an electronic device provided in one embodiment of this application;

[0024] Figure 5 This is a block diagram of an electronic device according to another embodiment of the present application. Detailed Implementation

[0025] The technical solutions of the embodiments of this application will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of this application, not all embodiments. Based on the embodiments of this application, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of this application.

[0026] The terms "first," "second," etc., used in the specification and claims of this application are used to distinguish similar objects and not to describe a specific order or sequence. It should be understood that such use of data can be interchanged where appropriate so that embodiments of this application can be implemented in orders other than those illustrated or described herein, and the objects distinguished by "first," "second," etc., are generally of the same class and the number of objects is not limited; for example, a first object can be one or more. Furthermore, in the specification and claims, "and / or" indicates at least one of the connected objects, and the character " / " generally indicates that the preceding and following objects are in an "or" relationship.

[0027] like Figure 1 The image shows a geological evaluation method for the suitability of water storage in a coal mine goaf, provided in an embodiment of this application.

[0028] The method may include the following steps:

[0029] Step 101: Collect geological structure distribution data, coal seam thickness data, and hydrological characteristic data of the coal mine goaf.

[0030] In some embodiments of this application, to assess the water storage suitability of coal mine goaf areas, it is necessary to collect geological structure distribution data, coal seam thickness data, and hydrological characteristic data of the goaf areas to establish a complete analytical basis. Specifically, geological structure distribution data, coal seam thickness data, and hydrological characteristic data of the goaf areas can be obtained through on-site geological mapping, drilling sampling, and mine water monitoring systems. This data is then organized and stored for subsequent assessment and analysis. Geological structure distribution data is used to determine the rock strata structure of the goaf area and potential leakage risks; coal seam thickness data affects fracture distribution and water storage capacity; and hydrological characteristic data reflects mine water inflow and water resource permeability characteristics. Obtaining the above data provides comprehensive geological information, allowing for the integration of multi-factor data in subsequent evaluation processes, improving the accuracy of water storage suitability assessments, and reducing the risk of misjudgment due to data limitations.

[0031] In a specific example, when conducting a water storage suitability assessment for a coal mine area, high-precision geological mapping technology was first used to record the structural characteristics of the goaf, and seismic exploration methods were used to determine the coal seam thickness. Simultaneously, the mine water monitoring system was used to measure the inflow of water in the goaf and the chemical composition of the groundwater, and the data were compiled into a complete dataset. Based on this dataset, the sealing and stability of the water storage space in the goaf were further analyzed, providing a reliable basis for subsequent water storage suitability scoring and site selection. Ultimately, this data acquisition process ensured the scientific validity of the subsequent assessment methods, reduced potential misjudgments, and improved the water resource utilization efficiency of the coal mine goaf.

[0032] Step 102: Determine the fracture characteristic assessment data of the coal mine goaf based on the measurement of the propagation speed of longitudinal waves in the goaf.

[0033] In some embodiments of this application, to accurately assess the water storage suitability of coal mine goaf areas, it is necessary to analyze the fracture characteristics of the rock mass, and the distribution and permeability of fractures have a significant impact on water storage capacity. Specifically, fracture characteristic data of the rock mass can be obtained by measuring the propagation velocity of longitudinal waves in the coal mine goaf area, and fracture distribution parameters can be calculated based on the measurement results. The propagation velocity of longitudinal waves (P-waves) in the rock mass is affected by rock integrity, porosity, and fracture distribution. A lower velocity usually indicates a higher degree of fracture development and enhanced permeability. By measuring the longitudinal wave velocity and establishing fracture characteristic assessment data, the fracture development of the coal mine goaf area can be quantified, making the subsequent water storage suitability assessment more scientific and accurate.

[0034] In a specific example, assessing the fracture characteristics of a mining area's goaf can begin by deploying seismic monitoring points at different locations and using a seismic wave detector to transmit P-wave signals into the goaf. The receiving system records the propagation time of the P-waves in different areas and calculates their propagation velocity, generating a velocity distribution map. Based on the analysis results, areas with highly developed fractures can be identified, and the rock mass permeability coefficient can be calculated to assess whether the area is suitable as underground water storage space. Ultimately, this data analysis method improves the accuracy of fracture characteristic assessment, provides a reliable basis for water storage suitability evaluation, and optimizes the utilization strategy of water resources in the mining area.

[0035] Step 103: Determine the geostress intensity ratio of the coal mine goaf based on the fracture characteristic assessment data.

[0036] In some embodiments of this application, to accurately assess the stability of water storage space in coal mine goafs, it is necessary to analyze the impact of in-situ stress levels on rock mass deformation and water storage capacity. Specifically, the in-situ stress intensity ratio of the coal mine goaf can be calculated based on fracture characteristic assessment data, and the in-situ stress distribution can be determined in conjunction with relevant geological parameters. The in-situ stress intensity ratio represents the rock mass's bearing capacity under mining conditions, and its calculation typically involves the uniaxial compressive strength of the rock, the rock mass integrity coefficient, and the maximum principal stress of the formation. A higher in-situ stress intensity ratio may indicate that the surrounding rock of the goaf is relatively stable and suitable for water storage, while a lower ratio may mean a higher risk of structural deformation. Through this calculation step, a quantitative analysis of the stability of the goaf can be achieved, providing a scientific basis for subsequent water storage suitability assessment.

[0037] In a specific example, when assessing the suitability of a mining area for water storage, the rock mass integrity coefficient can be calculated first using fracture characteristic data. Then, combined with the uniaxial compressive strength of the rock and the principal stress values ​​of the formation measured on-site, the in-situ stress intensity ratio of the goaf can be further calculated. According to the calculation results, a high in-situ stress intensity ratio for a certain water storage space in the mining area indicates that its surrounding rock has strong stability and is suitable for constructing underground water storage space. Therefore, this assessment method ensures the reliability of water storage site selection in goaf areas and improves the rational utilization efficiency of mine water resources.

[0038] Step 104: Determine the water storage suitability score for the coal mine goaf based on the determined geological structure distribution data, fracture characteristic assessment data, coal seam thickness data, hydrological characteristic data, and geostress intensity ratio, and determine the water storage suitability status of the coal mine goaf based on the determined water storage suitability score.

[0039] In some embodiments of this application, to scientifically assess the water storage suitability of coal mine goaf areas, it is necessary to comprehensively analyze multiple key geological parameters and perform quantitative analysis to ensure the accuracy and repeatability of the assessment results. Specifically, based on collected geological structure distribution data, fracture characteristic assessment data, coal seam thickness data, hydrological characteristic data, and geostress intensity ratios, a water storage suitability score can be calculated using a suitability scoring model, and the water storage suitability of the coal mine goaf area can be determined based on the score results. The water storage suitability score is calculated based on multi-factor weighted calculation, with each indicator assigned different weights to reflect the impact of different geological conditions on water storage capacity. Ultimately, the score is used to classify the water storage suitability of coal mine goaf areas, guiding the site selection and construction of mine water storage spaces, thereby improving the utilization efficiency of mine water resources and reducing environmental impact.

[0040] In a specific example, to determine the water storage suitability of a coal mine goaf, the following steps can be taken: first, data on the geological structure type, fracture distribution, coal seam thickness, and hydrological conditions of the area can be collected, and geostress parameters can be measured. Then, a suitability scoring model can be used to calculate the water storage suitability score for the mining area, and based on the score, the goaf can be classified as a "relatively suitable" water storage space. Ultimately, this assessment results guide the planning of water storage space in the mining area, making site selection more scientific and rational, improving the storage and utilization efficiency of mine water, and reducing resource waste and potential geological risks caused by unsuitable site selection.

[0041] In summary, this embodiment of the application first collects geological structure distribution data, coal seam thickness data, and hydrological characteristic data of the coal mine goaf, and then accurately determines fracture characteristic assessment data by measuring the propagation velocity of P-waves in the coal mine goaf. This provides a more scientific method for fracture characteristic determination than traditional empirical analysis, effectively quantifies the permeability and stability of coal and rock mass fractures, provides a solid data foundation for the accurate calculation of goaf water storage suitability, and avoids the one-sidedness caused by considering only a single or a few geological factors in traditional methods. It also reduces errors caused by human experience judgment and enhances the repeatability and reliability of suitability evaluation. Then, based on the fracture characteristic assessment data... By determining the geostress intensity ratio of the goaf, a more comprehensive assessment of the structural stability of the goaf water storage space is achieved, thereby reducing the risk of deformation or instability of the goaf water storage space. Finally, by combining geological structure distribution data, fracture characteristic assessment data, coal seam thickness data, hydrological characteristic data, and the geostress intensity ratio, a water storage suitability score for the goaf is determined, achieving a more comprehensive and scientific evaluation of goaf water storage suitability. This reduces the uncertainty of the evaluation results, makes the water storage suitability assessment more standardized across different mining areas, and improves the generalizability and applicability of the assessment, thus providing guidance for optimizing the site selection and construction strategies of water storage spaces. This technological breakthrough avoids the unreasonable site selection problems that may be caused by traditional assessment methods, improves the utilization efficiency of mine water resources, and effectively reduces environmental impact. Therefore, based on the method of this application embodiment, through systematic data collection and analysis, a precise assessment of the water storage suitability of goafs is achieved, reducing the uncertainty brought by traditional methods and improving the reliability of the evaluation results, providing more reliable technical support for the sustainable development of the coal mining industry.

[0042] Figure 2 This is another geological evaluation method for the suitability of water storage in coal mine goaf areas provided in the embodiments of this application.

[0043] The method may include the following steps:

[0044] Step 201: Collect geological structure distribution data, coal seam thickness data, and hydrological characteristic data of the coal mine goaf.

[0045] The method shown in this step has been explained in step 101 and will not be repeated here.

[0046] Optionally, step 201 includes the following sub-steps:

[0047] Sub-step 2011: Based on the collection of fault displacement data in the coal mine goaf, geological structure distribution data are obtained.

[0048] In some embodiments of this application, to further determine the geological structure distribution of coal mine goaf areas, it is necessary to collect fault displacement data of the goaf areas to identify the impact of stratigraphic structure on water storage capacity. Specifically, geological mapping and seismic exploration techniques can be used to investigate faults in coal mine goaf areas and measure fault displacement to determine the degree of stratigraphic fracturing. Fault displacement refers to the displacement distance of rock strata on both sides of a fault in the horizontal or vertical direction. This parameter can reflect the complexity of the geological structure. Areas with larger fault displacement are usually accompanied by higher permeability, which may lead to an increased risk of leakage of water storage space. By collecting and analyzing fault displacement data, the geological stability of coal mine goaf areas can be effectively assessed, and support can be provided to optimize the water storage suitability evaluation, making the selection of water storage sites in goaf areas more scientific and reasonable.

[0049] In a specific example, when assessing the suitability of a coal mine goaf for water storage, a high-precision geological mapping instrument can be used to calibrate the faults in the goaf, and seismic reflection waves can be used to determine the fault displacement. During data acquisition, the fault displacements at multiple measuring points are recorded, and their distribution is analyzed. Ultimately, the fault displacement in a certain area exceeds 10 meters, indicating that the rock strata in that area have been significantly affected by mining, have high permeability, and are unsuitable as a primary water storage space, while areas with smaller fault displacements are more suitable for water storage. This assessment process improves the reliability of the goaf water storage suitability evaluation and reduces the geological risks that may arise from the selection of water storage sites.

[0050] Sub-step 2012: Based on the collection of crack height and layer thickness in the goaf of the coal mine, coal seam thickness data is obtained.

[0051] In some embodiments of this application, to further determine the coal seam thickness data in the goaf, it is necessary to collect the fracture height and thickness of the coal seam to quantify their impact on water storage suitability. Specifically, drilling sampling and seismic exploration techniques can be used to determine the coal seam thickness data in the goaf, including fracture height (the caving height after coal seam mining) and thickness (the original thickness of the coal seam). Fracture height is the height of the water-conducting fracture zone formed after coal seam mining. This parameter affects the water storage capacity of the goaf; a larger fracture height usually means a larger water storage space, capable of accommodating more mine water. Thickness determines the geological characteristics of the coal seam before mining and affects the water storage structure after mining. By collecting and analyzing fracture height and thickness data, the assessment of the water storage capacity of the coal goaf can be optimized, making water storage site selection more consistent with geological conditions.

[0052] In a specific example, during a water storage suitability assessment of a mining area, core samples were drilled at different measuring points, and the coal seam thickness was determined using seismic wave reflection. Simultaneously, the fracture height after mining was calculated. The measurement results showed that the coal seam thickness in this mining area ranged from 3.5 meters to 8 meters, and the fracture height was approximately 10 times the coal seam thickness. Based on the analysis, the area's water storage capacity was deemed ideal, making it suitable as an underground water storage space. Ultimately, this data acquisition process ensured the scientific rationality of the water storage site selection, improved the utilization efficiency of mine water resources, and reduced assessment errors caused by insufficient data.

[0053] Sub-step 2013: Based on the collection of water inflow in the coal mine goaf, hydrological characteristic data are obtained.

[0054] In some embodiments of this application, to further determine the hydrological characteristics of coal mine goaf areas, it is necessary to collect the water inflow volume of the mining area to analyze groundwater permeability and storage capacity. Specifically, this can be achieved through a mine water monitoring system or on-site measurement equipment, recording the water inflow volume of the goaf area over different time periods, and analyzing it in conjunction with relevant hydrological data. Water inflow volume refers to the amount of water flowing into the mine per unit time; this parameter reflects the permeability of the surrounding rock in the goaf area and the stability of water resources. Areas with larger water inflow volumes usually indicate frequent groundwater activity, which may lead to an increased risk of leakage into the water storage space, while areas with smaller water inflow volumes may have higher water storage stability. This provides a basis for subsequent water storage suitability assessment, making the utilization of mine water resources more efficient.

[0055] In a specific example, a mining area needed to assess the suitability of its goaf for water storage. Water inflow monitoring equipment was deployed at multiple monitoring points, and data was collected at different time periods. The measurement results showed that the water inflow in the goaf was approximately 5,000 cubic meters per day, with high mineralization. Based on the data analysis, due to the large water inflow and high permeability of the surrounding rock, this area might not be suitable as a primary water storage space. Ultimately, this data collection process ensured the scientific rationality of the water storage site selection, improved the efficiency of mine water resource utilization, and reduced potential risks caused by leakage problems.

[0056] Step 202: Based on the measurement of the propagation speed of longitudinal waves in the coal mine goaf, determine the fracture characteristic assessment data of the coal mine goaf.

[0057] The method shown in this step has been explained in step 102 and will not be repeated here.

[0058] Optionally, step 202 includes the following sub-steps:

[0059] Sub-step 2021 involves testing the longitudinal wave velocity of the rock mass when the longitudinal wave propagates in the coal mine goaf, and the longitudinal wave velocity of the rock block when the longitudinal wave propagates in the rock block of the coal mine goaf.

[0060] In some embodiments of this application, to further determine the integrity of the rock mass in a coal mine goaf, it is necessary to test the propagation velocity of P-waves in the rock mass and rock blocks to analyze the rock mass structure and fracture characteristics. Specifically, seismic wave detection equipment can be used to send P-wave signals to the coal mine goaf and measure the propagation velocity of P-waves in the rock mass (large continuous rock strata) and rock blocks (smaller independent rock masses), respectively. The P-wave velocity of the rock mass reflects the overall stability of the rock strata, while the P-wave velocity of the rock blocks characterizes the structural characteristics of the local rock mass. The ratio of the two can be used to calculate the rock mass integrity coefficient. This test data helps to assess the degree of rock mass fracture development, thereby supporting subsequent water storage suitability analysis.

[0061] In a specific example, a mine conducted a suitability assessment for water storage in a goaf. Seismic wave receivers were deployed at different rock strata locations, and P-wave signals were transmitted to the goaf. During data acquisition, the propagation velocity of the P-wave in the rock mass was recorded as 3500 m / s, and its propagation velocity in the rock blocks as 2800 m / s. The square of the ratio of these two velocity values ​​was calculated to determine the rock mass integrity coefficient. Analysis results showed that the goaf had a high rock mass integrity coefficient and relatively stable rock strata, making it suitable as an underground water storage space. Ultimately, this testing process ensured the scientific rationality of the water storage suitability assessment and improved the utilization efficiency of mine water resources.

[0062] Sub-step 2022: The square of the ratio of the longitudinal wave velocity of the rock mass to the longitudinal wave velocity of the rock block obtained by the test is determined as the rock mass integrity coefficient value of the coal mine goaf, and the fracture characteristic assessment data is determined based on the determined rock mass integrity coefficient value and the number of fractures in the coal mine goaf.

[0063] In some embodiments of this application, to further determine the fracture characteristics of the coal mine goaf, it is necessary to calculate the rock mass integrity coefficient to quantify the stability and permeability of the rock mass. Specifically, this can be achieved by measuring the propagation velocity of longitudinal waves (P-waves) in the coal mine goaf, obtaining the P-wave velocity of the rock mass and the P-wave velocity of the rock blocks respectively, and calculating the square of their ratio to determine the rock mass integrity coefficient. This can be done using the formula... Expression, in which K v Indicates the integrity coefficient of the rock mass. C p This represents the longitudinal wave velocity (m / s) of the rock mass. C v This represents the longitudinal wave velocity (m / s) of the rock mass. The rock mass integrity coefficient describes the structural integrity of the rock mass; a higher value generally indicates a more intact rock mass with fewer fractures and lower permeability, which is beneficial for water storage stability. Subsequently, by combining data on the number of fractures in the coal mine goaf, the final fracture characteristic assessment data is determined, providing quantitative indicators for subsequent water storage suitability analysis. This allows for a more accurate analysis of the water storage capacity of the goaf rock mass, improving the scientific rigor and reliability of water storage suitability assessment.

[0064] In a specific example, when assessing the water storage suitability of a coal mine goaf, seismic detectors can be deployed at multiple measuring points to determine the propagation velocity of P-waves in the rock mass and rock blocks. The measurement results show that the P-wave velocity in the rock mass of a certain area is 2500 m / s, and the P-wave velocity in the rock blocks is 1800 m / s. Based on calculations, the rock mass integrity coefficient is 1.93. Combined with data on the number of fractures in the area, researchers identify the rock mass permeability and further assess the water storage suitability of the goaf. Ultimately, this calculation method improves the accuracy of the water storage capacity assessment of goafs and optimizes the planning of water resource utilization in the mining area.

[0065] Step 203: Determine the geostress intensity ratio of the coal mine goaf based on the fracture characteristic assessment data.

[0066] The method shown in this step has been explained in step 103 and will not be repeated here.

[0067] Optionally, step 203 can be achieved through the following steps:

[0068] Sub-step 2030: The product of the rock mass integrity coefficient of the coal mine goaf and the uniaxial saturated compressive strength of the rock in the coal mine goaf, and the quotient of the maximum principal stress of the strata in the coal mine goaf, are determined as the geostress intensity ratio.

[0069] In some embodiments of this application, to further determine the in-situ stress intensity ratio of a coal mine goaf, it is necessary to combine the rock mass integrity coefficient, the uniaxial saturated compressive strength of the rock, and the maximum principal stress value of the stratum to quantify the stability of the surrounding rock in the goaf. Specifically, the rock mass integrity coefficient and the uniaxial saturated compressive strength value of the rock in the coal mine goaf can be obtained first based on test data, and their product can be calculated. Subsequently, the obtained product value is divided by the maximum principal stress value of the stratum to determine the final in-situ stress intensity ratio, which can be determined using the formula... The expression, where s represents the ratio of ground stress intensity, R c This represents the uniaxial saturated compressive strength (MPa). σ m This represents the maximum principal stress value (MPa), while K v This represents the rock mass integrity coefficient. The rock mass integrity coefficient measures the stability of rock strata; a higher coefficient indicates stronger rock mass structure integrity, fewer fissures, and suitability for water storage. The uniaxial saturated compressive strength of rock represents its bearing capacity under stress, while the maximum principal stress of the formation reflects the stress state of the goaf. By calculating the ratio of ground stress intensity, the bearing capacity and deformation risk of the surrounding rock in the goaf can be effectively assessed, providing a scientific basis for subsequent water storage suitability analysis.

[0070] In a specific example, a suitability assessment for water storage in a coal mine goaf was conducted. The rock mass integrity coefficient was tested using drilled samples, and the results showed it to be 0.75. Simultaneously, the uniaxial saturated compressive strength of the rock was experimentally determined to be 30 MPa, and the maximum principal stress of the formation was obtained from field data, totaling 15 MPa. Based on calculations, the stress-intensity ratio was 1.5. The analysis results indicate that the rock mass structure in this area is stable, and the stress level is moderate, making it suitable as an underground water storage space. Ultimately, this assessment method improved the rationality of water storage site selection in goaf areas and optimized the planning for mine water resource utilization.

[0071] Step 204: Determine the water storage suitability score for the coal mine goaf based on the determined geological structure distribution data, fracture characteristic assessment data, coal seam thickness data, hydrological characteristic data, and geostress intensity ratio, and determine the water storage suitability status of the coal mine goaf based on the determined water storage suitability score.

[0072] The method shown in this step has been explained in step 104 and will not be repeated here.

[0073] Optionally, in order for the coal mine goaf to have corresponding uniaxial saturated compressive strength values ​​and maximum principal stress values, the water storage suitability score of the coal mine goaf is determined based on the determined geological structure distribution data, fracture characteristic assessment data, coal seam thickness data, hydrological characteristic data, and in-situ stress intensity ratio. Step 204 includes the following sub-steps:

[0074] Sub-step 2041: Determine the first geological information score and fracture information score of the coal mine goaf according to the first weight, and determine the second geological information score, coal seam information score, hydrological score and stress intensity score of the coal mine goaf according to the second weight.

[0075] Among them, the first weight is greater than the second weight; the first geological information score is used to characterize the complex geological structure of the coal mine goaf; the second geological information score is used to characterize the tilt of the rock strata in the coal mine goaf.

[0076] In some embodiments of this application, to further determine the suitability score for water storage in coal mine goaf areas, it is necessary to calculate the weights of multiple geological indicators to comprehensively assess the feasibility of the water storage space. Specifically, the first geological information score and fracture information score of the coal mine goaf area can be calculated first based on a first weight. The first geological information score is used to characterize the geological structural complexity of the coal mine goaf area. Subsequently, the second geological information score, coal seam information score, hydrological score, and stress intensity score of the coal mine goaf area are calculated based on a second weight. The first weight is greater than the second weight to ensure that the degree of geological structural complexity has a higher weighting in the suitability assessment. Geological structural complexity directly affects the sealing of the water storage space, while factors such as strata tilt, hydrological characteristics, and geostress levels indirectly affect stability and permeability. By rationally allocating weights, the assessment system becomes more scientific, reducing evaluation misjudgments caused by biases from single factors.

[0077] In a specific example, a water storage suitability assessment was conducted for a mining area. First, scores were calculated based on measured geological data. The geological structure of this mining area was relatively simple, so the first geological information score was 15 out of 20. The fracture distribution was moderate, so the fracture information score was 15 out of 20. The rock strata dip angle was moderate, so the second geological information score was 10 out of 15. The coal seam thickness was ideal, so the coal seam information score was 10 out of 15. The hydrological conditions were suitable, so the hydrological score was 10 out of 15. The geostress intensity ratio was moderate, so the stress intensity score was 10 out of 15. Ultimately, these scores were incorporated into the suitability scoring model, providing a basis for subsequent water storage suitability classification and decision-making. This improved the rational utilization of mine water resources and reduced the impact of assessment errors on water storage site selection.

[0078] As a specific way of classifying the dip angle of rock strata, in some specific implementation processes of this application, rock strata can be divided according to the size of the dip angle as: nearly horizontal (<5°), gently dipping (5° < dip angle <10°), dipping (10° < dip angle <45°), and steeply dipping (>45°).

[0079] Sub-step 2042: The sum of the determined first geological information score, second geological information score, fracture information score, coal seam information score, hydrological score, and stress intensity score is determined as the water storage suitability score.

[0080] In some embodiments of this application, to further quantify the water storage suitability of coal mine goaf areas, it is necessary to comprehensively consider the scores of multiple geological parameters to ensure the scientific validity and operability of the assessment results. Specifically, the first geological information score, the second geological information score, the fracture information score, the coal seam information score, the hydrological score, and the stress intensity score can be obtained first, and then the scores can be summed to determine the final water storage suitability score. The water storage suitability score is calculated based on the weights of different factors. Each score measures the key geological characteristics of the coal mine goaf area, among which the geological structural complexity, stratum dip angle, fracture distribution, hydrological conditions, and geostress intensity jointly determine the water storage capacity of the goaf area. By calculating the water storage suitability score, the rationality of the water storage space site selection in the mining area can be clarified, and the water storage planning strategy can be optimized to improve the utilization efficiency of mine water resources.

[0081] In a specific example, a water storage suitability assessment was conducted on a mining area. The assessment yielded scoring data for the region, including a first geological information score of 18 points, a second geological information score of 12 points, a fracture information score of 10 points, a coal seam information score of 9 points, a hydrological score of 7 points, and a stress intensity score of 6 points. Based on the calculations, the area's water storage suitability score was 62 points, and according to the score range, the goaf was classified as a "relatively suitable" water storage space. Ultimately, this assessment method ensured the rationality of the site selection for underground water storage spaces in the mining area, improved the storage and recycling capacity of mine water resources, and reduced geological risks that might result from improper site selection.

[0082] Table 1 illustrates the geological scoring method for the suitability of water storage in coal mine goafs based on embodiments of this application. The scores for various geological factors are categorized according to different value ranges to evaluate the suitability of water storage space in coal mine goafs. This scoring method involves multiple geological parameters, including geological structural complexity, fracture characteristics, coal seam thickness, stratum dip angle, hydrological characteristics, and geostress level. Each indicator is assigned a corresponding score value according to different value ranges. Generally, geological conditions more favorable for water storage, such as lower geological structural complexity, fewer fractures, thicker coal seams, and moderate hydrological conditions, will obtain higher score values, while geological conditions less favorable for water storage will correspond to lower score values.

[0083] Table 1. Geological Scoring Method for the Suitability of Water Storage Space in Coal Mine Goaf Areas

[0084]

[0085] The aforementioned scoring system ensures the scientific rigor and standardization of water storage suitability assessment, enabling quantitative comparisons of water storage suitability across different mining areas using a unified method. Ultimately, these scores are aggregated and calculated to determine the water storage suitability score for coal mine goaf areas, thereby assessing the feasibility of constructing water storage spaces. This method not only improves the utilization rate of mine water resources but also optimizes water storage space planning, providing technical support for green coal mining and comprehensive water resource utilization.

[0086] Optionally, in order to determine the water storage suitability of the coal mine goaf based on the determined water storage suitability score, step 204 includes the following sub-steps:

[0087] Sub-step 2043 compares the preset multiple water storage suitability score intervals with the determined water storage suitability score values ​​to obtain an evaluation index of the geological complexity of the coal mine goaf.

[0088] In some embodiments of this application, to further clarify the geological complexity of coal mine goaf areas, it is necessary to compare the determined water storage suitability score with multiple preset water storage suitability score intervals to obtain a geological condition complexity evaluation index. Specifically, the water storage suitability score of the coal mine goaf area can first be matched with multiple preset score intervals to determine the geological condition complexity evaluation index. The geological condition complexity evaluation index is used to characterize the stability, fracture development degree, and permeability of the surrounding rock of the goaf area. The score intervals can be divided according to different levels of water storage suitability of the mining area, such as "simple," "relatively simple," "moderately complex," "relatively complex," and "extremely complex." This allows for accurate classification of different coal mine goaf areas and provides support for subsequent water storage suitability assessments, making the evaluation more standardized and improving the utilization efficiency of mine water resources.

[0089] In a specific example, the calculated water storage suitability score for a goaf in a mining area is 68 points. This score can then be compared with a pre-defined water storage suitability score range. According to the set range, this score falls within the "relatively simple" geological condition evaluation range, indicating that the rock strata structure in this area is relatively stable, with a moderate distribution of fractures, making it suitable for constructing underground water storage space. Ultimately, this comparison process ensures the accuracy of the geological condition classification of the goaf, provides a reliable basis for subsequent water storage suitability assessments, and optimizes the water storage site selection strategy for the mining area.

[0090] Sub-step 2044: Based on the evaluation index of geological condition complexity, determine the water storage suitability assessment result of the coal mine goaf, so that the evaluation index of geological condition complexity is negatively correlated with the water storage suitability assessment result.

[0091] In some embodiments of this application, to further determine the suitability assessment results for water storage in coal mine goaf areas, it is necessary to use geological condition complexity evaluation indicators to ensure that the assessment results conform to the actual feasibility of water storage space. Specifically, the geological condition complexity evaluation indicators can be obtained first, and then used to adjust the water storage suitability assessment results based on a preset negative correlation. The geological condition complexity evaluation indicators are used to measure the rock strata stability, fracture development, and permeability of the goaf area. Areas with higher complexity generally indicate greater rock mass fracturing and higher permeability, making them unsuitable for water storage. Based on this negative correlation, areas with lower geological condition complexity are classified as areas with higher water storage suitability, while areas with higher geological condition complexity are classified as areas with lower water storage suitability. This classification assessment method can improve the rationality of water storage site selection and ensure the effective utilization of mine water resources.

[0092] In a specific example, a water storage suitability assessment was conducted on a mined-out area of ​​a certain mining district. Based on the evaluation index of geological complexity, the complexity of different areas within the mining district was categorized into five levels: "simple," "relatively simple," "moderately complex," "relatively complex," and "extremely complex." Subsequently, through negative correlation calculations, areas with "simple" geological conditions were assessed as "suitable" water storage spaces, while "extremely complex" areas were assessed as "unsuitable" water storage spaces. Ultimately, this assessment process ensured the rational planning of water storage space in the mining district, made the water storage suitability assessment more accurate, and improved the storage and recycling capacity of mine water resources.

[0093] Table 2 presents the geological suitability scoring method for water storage space in coal mine goaf areas based on Table 1, classifying the complexity of geological conditions for reservoir construction. In the embodiments of this application, this classification method divides the geological complexity of goaf areas into multiple levels based on suitability scores to guide the site selection and planning of water storage spaces.

[0094] Table 2 Classification of Geological Conditions for Reservoir Construction

[0095]

[0096] The classification criteria in Table 2 are based on a comprehensive calculation of multiple parameters, including geological structure, fracture distribution, coal seam thickness, hydrological conditions, and geostress level, as combined in Table 1. The geological conditions of the goaf are classified into different levels of complexity according to the score.

[0097] Generally, lower geological complexity corresponds to higher water storage suitability, while higher complexity may mean increased difficulty in constructing water storage spaces. Using this classification method, mining areas can optimize water storage planning based on water storage suitability levels, reduce geological risks, and enhance the sustainable utilization capacity of mine water resources.

[0098] Step 205: Based on the determined suitability of water storage in the coal mine goaf, determine the water storage plan suggestion strategy for the coal mine goaf.

[0099] In some embodiments of this application, to further optimize water storage and utilization in coal mine goaf areas, it is necessary to formulate corresponding water storage plan suggestions based on water storage suitability to ensure the effective storage and utilization of water resources. Specifically, the feasibility of water storage in goaf areas can be analyzed based on the determined water storage suitability score, and corresponding water storage plans can be formulated, including water storage methods, water-retaining structure design, and leakage control measures. The water storage plan suggestion strategy is based on suitability level classification, providing different optimization suggestions for coal mine goaf areas with different suitability levels to ensure the stability and safety of water storage space and improve water resource utilization. This enables systematic management of mine water resources and ensures the long-term sustainable use of water storage space.

[0100] In a specific example, if a mining area's goaf has a water storage suitability score of "relatively suitable," then a water storage plan strategy can be developed based on this score. This strategy includes constructing water-retaining structures in key areas to increase water storage capacity, employing seepage control technologies to reduce water loss, and optimizing well layout to improve the water storage efficiency of the goaf. Ultimately, this strategy guides the planning of the mining area's water storage project, making the water storage system more scientific and rational, improving the recovery and utilization rate of mine water, and reducing environmental impact and operating costs.

[0101] In summary, this embodiment of the application first collects geological structure distribution data, coal seam thickness data, and hydrological characteristic data of the coal mine goaf, and then accurately determines fracture characteristic assessment data by measuring the propagation velocity of P-waves in the coal mine goaf. This provides a more scientific method for fracture characteristic determination than traditional empirical analysis, effectively quantifies the permeability and stability of coal and rock mass fractures, provides a solid data foundation for the accurate calculation of goaf water storage suitability, and avoids the one-sidedness caused by considering only a single or a few geological factors in traditional methods. It also reduces errors caused by human experience judgment and enhances the repeatability and reliability of suitability evaluation. Then, based on the fracture characteristic assessment data... By determining the geostress intensity ratio of the goaf, a more comprehensive assessment of the structural stability of the goaf water storage space is achieved, thereby reducing the risk of deformation or instability of the goaf water storage space. Finally, by combining geological structure distribution data, fracture characteristic assessment data, coal seam thickness data, hydrological characteristic data, and the geostress intensity ratio, a water storage suitability score for the goaf is determined, achieving a more comprehensive and scientific evaluation of goaf water storage suitability. This reduces the uncertainty of the evaluation results, makes the water storage suitability assessment more standardized across different mining areas, and improves the generalizability and applicability of the assessment, thus providing guidance for optimizing the site selection and construction strategies of water storage spaces. This technological breakthrough avoids the unreasonable site selection problems that may be caused by traditional assessment methods, improves the utilization efficiency of mine water resources, and effectively reduces environmental impact. Therefore, based on the method of this application embodiment, through systematic data collection and analysis, a precise assessment of the water storage suitability of goafs is achieved, reducing the uncertainty brought by traditional methods and improving the reliability of the evaluation results, providing more reliable technical support for the sustainable development of the coal mining industry.

[0102] refer to Figure 3 This application illustrates a geological evaluation system 30 for the suitability of water storage in coal mine goafs, as provided in an embodiment of this application, comprising:

[0103] Data acquisition device 301, testing and evaluation device 302, and suitability evaluation device 303;

[0104] The data acquisition device 301 is used to collect geological structure distribution data, coal seam thickness data, and hydrological characteristic data of coal mine goaf areas;

[0105] The test and evaluation device 302 is used to determine the fracture characteristics evaluation data of the coal mine goaf based on the measurement of the propagation speed of the longitudinal wave in the coal mine goaf.

[0106] The suitability assessment device 303 is used to determine the geostress intensity ratio of the coal mine goaf based on the fracture characteristic assessment data, and to determine the water storage suitability score of the coal mine goaf based on the determined geological structure distribution data, fracture characteristic assessment data, coal seam thickness data, hydrological characteristic data, and geostress intensity ratio, and to determine the water storage suitability status of the coal mine goaf based on the determined water storage suitability score.

[0107] Optionally, the data acquisition device 301 is specifically used to obtain geological structure distribution data based on the acquisition of fault displacement in the coal mine goaf, to obtain coal seam thickness data based on the acquisition of crack height and layer thickness in the coal mine goaf, and to obtain hydrological characteristic data based on the acquisition of water inflow in the coal mine goaf.

[0108] Optionally, the testing and evaluation device 302 is specifically used to test the longitudinal wave velocity of the rock mass when the longitudinal wave propagates in the coal mine goaf and the longitudinal wave velocity of the rock block when the longitudinal wave propagates in the rock block of the coal mine goaf, and to determine the square of the ratio of the longitudinal wave velocity of the rock mass to the longitudinal wave velocity of the rock block as the rock mass integrity coefficient value of the coal mine goaf, and to determine the fracture characteristic evaluation data based on the determined rock mass integrity coefficient value and the number of fractures in the coal mine goaf.

[0109] Optionally, the fracture characteristic assessment data includes the rock mass integrity coefficient value of the coal mine goaf. In the process of determining the geostress intensity ratio of the coal mine goaf based on the fracture characteristic assessment data, the suitability assessment device 303 specifically uses the product of the rock mass integrity coefficient value of the coal mine goaf and the uniaxial saturated compressive strength value of the rock in the coal mine goaf, and the quotient of the maximum principal stress value of the strata in the coal mine goaf, to determine the geostress intensity ratio.

[0110] Optionally, the coal mine goaf has corresponding uniaxial saturated compressive strength values ​​and maximum principal stress values ​​of the strata. In the process of determining the water storage suitability score for the coal mine goaf based on the determined geological structure distribution data, fracture characteristic assessment data, coal seam thickness data, hydrological characteristic data, and geostress intensity ratio, the suitability assessment device 303 specifically determines the first geological information score and fracture information score of the coal mine goaf according to a first weight, and determines the second geological information score, coal seam information score, hydrological score, and stress intensity score of the coal mine goaf according to a second weight. The sum of the determined first geological information score, second geological information score, fracture information score, coal seam information score, hydrological score, and stress intensity score is determined as the water storage suitability score. The first weight is greater than the second weight. The first geological information score is used to characterize the geological structure complexity of the coal mine goaf; the second geological information score is used to characterize the strata dip in the coal mine goaf.

[0111] Optionally, in the process of determining the water storage suitability of the coal mine goaf based on the determined water storage suitability score, the suitability assessment device 303 is specifically used to compare multiple preset water storage suitability score intervals with the determined water storage suitability score to obtain an evaluation index of the geological condition complexity of the coal mine goaf, and to determine the water storage suitability assessment result of the coal mine goaf based on the geological condition complexity evaluation index, so that the geological condition complexity evaluation index and the water storage suitability assessment result are negatively correlated.

[0112] Optionally, the geological evaluation system 30 for the suitability of water storage in coal mine goaf areas also includes a strategy prompt module;

[0113] The strategy suggestion module is used to determine the water storage plan suggestion strategy for the coal mine goaf based on the determined water storage suitability of the goaf.

[0114] In summary, this embodiment of the application first collects geological structure distribution data, coal seam thickness data, and hydrological characteristic data of the coal mine goaf, and then accurately determines fracture characteristic assessment data by measuring the propagation velocity of P-waves in the coal mine goaf. This provides a more scientific method for fracture characteristic determination than traditional empirical analysis, effectively quantifies the permeability and stability of coal and rock mass fractures, provides a solid data foundation for the accurate calculation of goaf water storage suitability, and avoids the one-sidedness caused by considering only a single or a few geological factors in traditional methods. It also reduces errors caused by human experience judgment and enhances the repeatability and reliability of suitability evaluation. Then, based on the fracture characteristic assessment data... By determining the geostress intensity ratio of the goaf, a more comprehensive assessment of the structural stability of the goaf water storage space is achieved, thereby reducing the risk of deformation or instability of the goaf water storage space. Finally, by combining geological structure distribution data, fracture characteristic assessment data, coal seam thickness data, hydrological characteristic data, and the geostress intensity ratio, a water storage suitability score for the goaf is determined, achieving a more comprehensive and scientific evaluation of goaf water storage suitability. This reduces the uncertainty of the evaluation results, makes the water storage suitability assessment more standardized across different mining areas, and improves the generalizability and applicability of the assessment, thus providing guidance for optimizing the site selection and construction strategies of water storage spaces. This technological breakthrough avoids the unreasonable site selection problems that may be caused by traditional assessment methods, improves the utilization efficiency of mine water resources, and effectively reduces environmental impact. Therefore, based on the method of this application embodiment, through systematic data collection and analysis, a precise assessment of the water storage suitability of goafs is achieved, reducing the uncertainty brought by traditional methods and improving the reliability of the evaluation results, providing more reliable technical support for the sustainable development of the coal mining industry.

[0115] Reference Figure 4The electronic device 500 may include one or more of the following components: processing component 502, memory 504, power supply component 506, multimedia component 508, audio component 510, input / output (I / O) interface 512, sensor component 514, and communication component 516.

[0116] Processing component 502 typically controls the overall operation of electronic device 500, such as operations associated with display, telephone calls, data communication, camera operation, and recording. Processing component 502 may include one or more processors 520 to execute instructions to perform all or part of the steps of the methods described above. Furthermore, processing component 502 may include one or more modules to facilitate interaction between processing component 502 and other components. For example, processing component 502 may include a multimedia module to facilitate interaction between multimedia component 508 and processing component 502.

[0117] Memory 504 is used to store various types of data to support the operation of electronic device 500. Examples of this data include instructions for any application or method operating on electronic device 500, contact data, phonebook data, messages, pictures, multimedia, etc. Memory 504 can be implemented by any type of volatile or non-volatile storage device or a combination thereof, such as static random access memory (SRAM), electrically erasable programmable read-only memory (EEPROM), erasable programmable read-only memory (EPROM), programmable read-only memory (PROM), read-only memory (ROM), magnetic storage, flash memory, magnetic disk, or optical disk.

[0118] Power supply component 506 provides power to various components of electronic device 500. Power supply component 506 may include a power management system, one or more power supplies, and other components associated with generating, managing, and distributing power to electronic device 500.

[0119] Multimedia component 508 includes an interface that provides an output interface between electronic device 500 and user. In some embodiments, the interface may include a liquid crystal display (LCD) and a touch panel (TP). If the interface includes a touch panel, the interface may be implemented as a touchscreen to receive input signals from the user. The touch panel includes one or more touch sensors to sense touches, swipes, and gestures on the touch panel. The touch sensors may not only sense the boundaries of touch or swipe actions but also detect the duration and pressure associated with the touch or swipe operation. In some embodiments, multimedia component 508 includes a front-facing camera and / or a rear-facing camera. When electronic device 500 is in an operating mode, such as shooting mode or multimedia mode, the front-facing camera and / or rear-facing camera may receive external multimedia data. Each front-facing camera and rear-facing camera may be a fixed optical lens system or have focal length and optical zoom capabilities.

[0120] Audio component 510 is used to output and / or input audio signals. For example, audio component 510 includes a microphone (MIC) used to receive external audio signals when electronic device 500 is in an operating mode, such as call mode, recording mode, and voice recognition mode. The received audio signals may be further stored in memory 504 or transmitted via communication component 516. In some embodiments, audio component 510 also includes a speaker for outputting audio signals.

[0121] Input / output (I / O) interface 512 provides an interface between processing component 502 and peripheral interface modules, such as keyboards, click wheels, buttons, etc. These buttons may include, but are not limited to, home buttons, volume buttons, power buttons, and lock buttons.

[0122] Sensor assembly 514 includes one or more sensors for providing state assessments of various aspects of electronic device 500. For example, sensor assembly 514 may detect the on / off state of electronic device 500, the relative positioning of components such as the display and keypad of electronic device 500, changes in position of electronic device 500 or a component of electronic device 500, the presence or absence of user contact with electronic device 500, orientation or acceleration / deceleration of electronic device 500, and temperature changes of electronic device 500. Sensor assembly 514 may include a proximity sensor configured to detect the presence of nearby objects without any physical contact. Sensor assembly 514 may also include a light sensor, such as a CMOS or CCD image sensor, for use in imaging applications. In some embodiments, sensor assembly 514 may also include an accelerometer, gyroscope, magnetometer, pressure sensor, or temperature sensor.

[0123] Communication component 516 facilitates wired or wireless communication between electronic device 500 and other devices. Electronic device 500 can access wireless networks based on communication standards, such as WiFi, carrier networks (such as 2G, 3G, 4G, or 5G), or combinations thereof. In one exemplary embodiment, communication component 516 receives broadcast signals or broadcast-related information from an external broadcast management system via a broadcast channel. In one exemplary embodiment, communication component 516 also includes a near-field communication (NFC) module to facilitate short-range communication. For example, the NFC module may be implemented based on radio frequency identification (RFID) technology, Infrared Data Association (IrDA) technology, ultra-wideband (UWB) technology, Bluetooth (BT) technology, and other technologies.

[0124] In an exemplary embodiment, the electronic device 500 may be implemented by one or more application-specific integrated circuits (ASICs), digital signal processors (DSPs), digital signal processing devices (DSPDs), programmable logic devices (PLDs), field-programmable gate arrays (FPGAs), controllers, microcontrollers, microprocessors, or other electronic components to implement the methods provided in the embodiments of this application.

[0125] In an exemplary embodiment, a non-transitory computer-readable storage medium including instructions is also provided, such as a memory 504 including instructions, which can be executed by a processor 520 of an electronic device 500 to perform the above-described method. For example, the non-transitory storage medium may be a ROM, random access memory (RAM), CD-ROM, magnetic tape, floppy disk, and optical data storage device, etc.

[0126] Figure 5 This is a block diagram of an electronic device 600 according to another embodiment of the present invention. For example, the electronic device 600 may be provided as a server.

[0127] Reference Figure 5 The electronic device 600 includes a processing component 622, which further includes one or more processors, and memory resources represented by memory 632 for storing instructions, such as application programs, that can be executed by the processing component 622. The application programs stored in memory 632 may include one or more modules, each corresponding to a set of instructions. Furthermore, the processing component 622 is configured to execute instructions to perform the methods provided in the embodiments of this application.

[0128] Electronic device 600 may also include a power supply component 626 configured to perform power management of electronic device 600, a wired or wireless network interface 650 configured to connect electronic device 600 to a network, and an input / output (I / O) interface 658. Electronic device 600 may operate on an operating system stored in memory 632, such as Windows Server™, Mac OS X™, Unix™, Linux™, FreeBSD™, or similar.

[0129] It should be noted that, for the sake of simplicity, the method embodiments of this application are all described as a series of actions. However, those skilled in the art should understand that the embodiments of this application are not limited to the described order of actions, because according to the embodiments of this application, some steps can be performed in other orders or simultaneously. Secondly, those skilled in the art should also understand that the embodiments described in the specification are all preferred embodiments, and the actions involved are not necessarily essential to the embodiments of this application.

[0130] Other embodiments of this application will readily occur to those skilled in the art upon consideration of the specification and practice of the application disclosed herein. This application is intended to cover any variations, uses, or adaptations of this application that follow the general principles of this application and include common knowledge or customary techniques in the art not disclosed herein. The specification and examples are to be considered exemplary only, and the true scope and spirit of this application are indicated by the following claims.

[0131] It should be understood that this application is not limited to the precise structure described above and shown in the accompanying drawings, and various modifications and changes can be made without departing from its scope. The scope of this application is limited only by the appended claims.

Claims

1. A coal mine goaf water storage suitability geological evaluation method, characterized in that, The application relates to a method for evaluating the water storage suitability of a coal mine goaf. Collecting geological structure distribution data, coal seam thickness data and hydrological characteristic data of the coal mine goaf; According to the determination of the propagation speed of a longitudinal wave when propagating in the coal mine goaf, the crack characteristic evaluation data of the coal mine goaf are determined; According to the crack characteristic evaluation data, the ground stress intensity ratio of the coal mine goaf is determined; the ground stress intensity ratio represents the bearing capacity of a rock mass under the mining condition; the greater the ground stress intensity ratio, the more suitable the rock mass is for water storage, and the higher the stress intensity score value is; According to the determined geological structure distribution data, crack characteristic evaluation data, coal seam thickness data, hydrological characteristic data and ground stress intensity ratio, the water storage suitability score value of the coal mine goaf is determined, and the water storage suitability of the coal mine goaf is determined according to the determined water storage suitability score value; The method for determining the crack characteristic evaluation data of the coal mine goaf according to the determination of the propagation speed of a longitudinal wave when propagating in the coal mine goaf comprises the following steps: According to the rock mass longitudinal wave speed when a longitudinal wave propagates in the coal mine goaf and the rock block longitudinal wave speed when the longitudinal wave propagates in the rock block of the coal mine goaf, the rock mass is tested; The square of the ratio of the rock mass longitudinal wave velocity obtained by the test and the rock block longitudinal wave velocity is determined as the rock mass integrity coefficient value of the coal mine goaf, and the crack feature evaluation data is determined according to the determined rock mass integrity coefficient value and the number of cracks in the coal mine goaf; the rock mass integrity coefficient is used to characterize the structural integrity of the rock mass, the larger the rock mass integrity coefficient, the more suitable for water storage, the higher the corresponding crack information score value, the higher the water storage stability, the higher the corresponding crack information score value; the structural integrity is negatively correlated with the permeability of the rock mass; the value of the rock mass integrity coefficient is expressed by the formula wherein K v represents the integrity coefficient of the rock mass, C p represents the longitudinal wave velocity of the rock mass, C v represents the longitudinal wave velocity of the rock block; The crack characteristic evaluation data contain the rock mass integrity coefficient value of the coal mine goaf, and the method for determining the ground stress intensity ratio of the coal mine goaf according to the crack characteristic evaluation data comprises the following steps: The product of the rock mass integrity coefficient value of the coal mine goaf and the uniaxial saturated compressive strength value of the rock of the coal mine goaf, and the quotient of the maximum principal stress value of the stratum of the coal mine goaf, is determined as the geo-stress intensity ratio value; the geo-stress intensity ratio value is expressed by the formula wherein s represents the geo-stress intensity ratio value, R c represents the uniaxial saturated compressive strength value, The method for determining the water storage suitability of the coal mine goaf according to the determined water storage suitability score value comprises the following steps: m represents the maximum principal stress value, K v represents the rock mass integrity coefficient; A plurality of water storage suitability score intervals are compared with the determined water storage suitability score value to obtain a geological condition complexity evaluation index of the coal mine goaf; According to the geological condition complexity evaluation index, the water storage suitability evaluation result of the coal mine goaf is determined, so that the geological condition complexity evaluation index is negatively correlated with the water storage suitability evaluation result. The method for collecting the geological structure distribution data, coal seam thickness data and hydrological characteristic data of the coal mine goaf comprises the following steps:

2. The coal mine goaf water storage suitability geological evaluation method according to claim 1, characterized in that, According to the collection of the fault throw of the coal mine goaf, the geological structure distribution data are obtained; According to the collection of the crack height and layer thickness of the coal mine goaf, the coal seam thickness data are obtained; According to the collection of the water inflow of the coal mine goaf, the hydrological characteristic data are obtained. The coal mine goaf has a corresponding rock uniaxial saturated compressive strength value and a stratum maximum principal stress value, and the method for determining the water storage suitability score value of the coal mine goaf according to the determined geological structure distribution data, crack characteristic evaluation data, coal seam thickness data, hydrological characteristic data and ground stress intensity ratio comprises the following steps:

3. The coal mine goaf water storage suitability geological evaluation method according to claim 1, characterized in that, ​ According to the first weight, a first geological information score value and a fissure information score value of the coal mine goaf are determined, and according to the second weight, a second geological information score value, a coal seam information score value, a hydrology score value and a stress intensity score value of the coal mine goaf are determined; the first weight is greater than the second weight; the first geological information score value is used to represent the geological structure complexity of the coal mine goaf; the second geological information score value is used to represent the rock stratum inclination in the coal mine goaf; The sum of the first geological information score value, the second geological information score value, the fissure information score value, the coal seam information score value, the hydrology score value and the stress intensity score value is determined as the water storage suitability score value.

4. The coal mine goaf water storage suitability geological evaluation method according to claim 1, characterized in that, The coal mine goaf water storage suitability geological evaluation method further comprises: According to the determined water storage suitability of the coal mine goaf, a water storage scheme prompting strategy for the coal mine goaf is determined.

5. A coal mine goaf water storage suitability geological evaluation system, characterized in that, Comprise: A collection device, a test evaluation device and a suitability evaluation device; The collection device is used to collect geological structure distribution data, coal seam thickness data and hydrology characteristic data of the coal mine goaf; The test evaluation device is used to determine fissure characteristic evaluation data of the coal mine goaf according to the determination of the propagation speed of the longitudinal wave when propagating in the coal mine goaf; The suitability evaluation device is used to determine the ground stress intensity ratio of the coal mine goaf according to the fissure characteristic evaluation data, and determine the water storage suitability score value of the coal mine goaf according to the determined geological structure distribution data, fissure characteristic evaluation data, coal seam thickness data, hydrology characteristic data and ground stress intensity ratio, and determine the water storage suitability of the coal mine goaf according to the determined water storage suitability score value; the ground stress intensity ratio represents the bearing capacity of the rock mass under the mining condition; the greater the ground stress intensity ratio, the more suitable for water storage, and the higher the corresponding stress intensity score value; The test evaluation device is specifically used for testing according to the rock mass longitudinal wave velocity when the longitudinal wave propagates in the coal mine goaf and the rock block longitudinal wave velocity when the longitudinal wave propagates in the rock block of the coal mine goaf, and determining the square of the ratio of the rock mass longitudinal wave velocity and the rock block longitudinal wave velocity obtained by the test as the rock mass integrity coefficient value of the coal mine goaf, and determining the fissure characteristic evaluation data according to the determined rock mass integrity coefficient value and the number of fissures in the coal mine goaf; The rock mass integrity coefficient is used to represent the structural integrity of the rock mass, the greater the rock mass integrity coefficient, the more suitable for water storage, the higher the corresponding fissure information score value, the higher the water storage stability, and the higher the corresponding fissure information score value; the structural integrity is negatively correlated with the permeability of the rock mass; The value of the rock mass integrity coefficient is expressed by the formula wherein K v denotes the integrity coefficient of the rock mass, C p denotes the longitudinal wave velocity of the rock mass, C v denotes the longitudinal wave velocity of the rock block; The crack feature evaluation data contains the rock mass integrity coefficient value of the coal mine goaf, the suitability evaluation device is used for determining the in-situ stress intensity ratio as the product of the rock mass integrity coefficient value of the coal mine goaf and the quotient of the uniaxial saturated compressive strength value of the rock of the coal mine goaf and the maximum principal stress value of the stratum of the coal mine goaf; the in-situ stress intensity ratio is determined by the formula is expressed, wherein s represents the in-situ stress intensity ratio, R c represents the uniaxial saturated compressive strength value, ​ m represents the maximum principal stress value, K v represents the rock mass integrity coefficient; The suitability evaluation device is specifically used for comparing a plurality of preset water storage suitability score intervals with the determined water storage suitability score value, obtaining a geological condition complexity evaluation index of the coal mine goaf, and determining a water storage suitability evaluation result of the coal mine goaf according to the geological condition complexity evaluation index, so that the geological condition complexity evaluation index and the water storage suitability evaluation result are negatively correlated.

6. A computer readable storage medium characterized by, The computer readable storage medium stores a computer program, and the computer program is executed by the processor to implement the coal mine goaf water storage suitability geological evaluation method in any one of claims 1 to 4.

7. An electronic device, comprising: The computer readable storage medium stores a computer program, and the computer program is executed by the processor to implement the coal mine goaf water storage suitability geological evaluation method in any one of claims 1 to 4.

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