Method and device for determining strength of coal mine high-water material filling body and terminal

Abstract

The invention provides a method and device for determining the strength of a coal mine high-water material filling body and a terminal. The method comprises the steps of obtaining working face coal seam basic data; wherein the working face coal seam basic data comprises key layer height, caving zone height, working face length, coal seam thickness, coal seam inclination angle, top plate compressive strength and top plate tensile strength; respectively calculating the foundation strength and the safety coefficient according to the working face coal seam basic data; and calculating the filling body strength requirement according to the foundation strength and the safety coefficient. According to the embodiment of the invention, by calculating the strength requirement in real time, the proportion of the filling body can be dynamically adjusted according to the change of the occurrence condition of the coal seam and the mining condition of the working face, the accuracy of strength calculation of the filling body is remarkably improved, and the filling efficiency of the filling body is further improved. Through accurate calculation and timely proportion adjustment, waste of resources can be effectively avoided, and safety and economical efficiency of coal mining are ensured.

Description

Technical Field

[0001] The present application relates to the technical field of deep well filling, and particularly to a method, device and terminal for determining the strength of a high-water material filling body in a coal mine. Background Art

[0002] Filling mining is an effective way to reduce surface subsidence and protect surface structures (buildings). Among the three commonly used filling mining methods at present, high-water material filling has gradually attracted people's attention due to its simple process and strong adaptability. The high-water material consists of two materials, A and B. After adding water to make slurry respectively, they are transported separately, and near the filling site, they are mixed together through a tee and solidify after mixing. The strength of the high-water material filling body is related to the mass ratio of solid material to water and the water-solid ratio. A high water-solid ratio results in a small amount of material used, low strength, low cost, and poor roof support effect. A low water-solid ratio leads to a high amount of material used, high strength, high cost, and good roof support effect.

[0003] Currently, the determination method of the strength of the high-water filling body is generally the empirical method, lacking a scientific theoretical basis. After the strength is determined, the same strength is adopted throughout the working face, and the current strength design value of the filling body is generally on the high side, resulting in waste in some areas with good geological conditions. Summary of the Invention

[0004] Embodiments of the present application provide a method, device and terminal for determining the strength of a high-water material filling body in a coal mine to solve the problem that the current strength design value of the filling body is generally on the high side.

[0005] In a first aspect, embodiments of the present application provide a method for determining the strength of a high-water material filling body in a coal mine, including:

[0006] Obtaining basic data of the coal seam in the working face; wherein, the basic data of the coal seam in the working face includes: key layer height, caving zone height, working face length, coal seam thickness, coal seam dip angle, roof compressive strength and roof tensile strength;

[0007] Calculating the basic strength and safety factor respectively according to the basic data of the coal seam in the working face;

[0008] Calculating the strength requirement of the filling body according to the basic strength and safety factor.

[0009] In a possible implementation manner, the method further includes:

[0010] Substituting the strength requirement of the filling body into the strength-water solid ratio relationship curve to determine the corresponding water-solid ratio, so as to instruct the grouting station to adjust the real-time ratio of the filling body slurry according to the water-solid ratio;

[0011] Among them, the strength-water solid ratio relationship curve is drawn based on the test results of the strength of the high-water material filling body with a water-solid ratio of 1:1 to 8:1.

[0012] In a possible implementation, the basic strength and safety factor are calculated respectively according to the basic data of the coal seam in the working face, including:

[0013] The basic strength is calculated according to the key stratum height and the caving zone height.

[0014] In a possible implementation, the calculation formula for the basic strength is:

[0015] Q1 = γB(H 关 -H 垮 )

[0016] Among them, γ is the rock density, B is the support coefficient of the filling body to the roof, and its value range is between 0 and 1. H 关 is the key stratum height, and H 垮 is the caving zone height.

[0017] In a possible implementation, the basic strength and safety factor are calculated respectively according to the basic data of the coal seam in the working face, including:

[0018] The safety factor is calculated according to the working face length, coal seam thickness, coal seam dip angle, roof compressive strength, and roof tensile strength.

[0019] In a possible implementation, the calculation formula for the safety factor is:

[0020] K = K 长 +K 倾 +K 厚 +K 压 +K 拉

[0021] Among them, K 长 、K 倾 、K 厚 、K 压 、K 拉 are the coefficients obtained by comparing the working face length, coal seam thickness, coal seam dip angle, roof compressive strength, roof tensile strength with their respective reference values.

[0022] In a possible implementation, the calculation formula for the strength requirement of the filling body is:

[0023] Q = KQ 1

[0024] Among them, K is the safety factor; Q 1 is the basic strength.

[0025] Second aspect, an embodiment of the present application provides a device for determining the strength of a high-water material filling body in a coal mine, including:

[0026] An acquisition module, configured to acquire basic data of the coal seam in the working face; wherein, the basic data of the coal seam in the working face includes: the key stratum height, the caving zone height, the working face length, the coal seam thickness, the coal seam dip angle, the roof compressive strength, and the roof tensile strength;

[0027] A first calculation module, configured to calculate the basic strength and the safety factor respectively according to the basic data of the coal seam in the working face;

[0028] A second calculation module, configured to calculate the strength requirement of the filling body according to the basic strength and the safety factor.

[0029] Third aspect, an embodiment of the present application provides a terminal, including a memory, a processor, and a computer program stored in the memory and executable on the processor. When the processor executes the computer program, the steps of the method described in the first aspect or any possible implementation manner of the first aspect above are implemented.

[0030] Fourth aspect, an embodiment of the present application provides a computer-readable storage medium, which stores a computer program. When the computer program is executed by a processor, the steps of the method described in the first aspect or any possible implementation manner of the first aspect above are implemented.

[0031] An embodiment of the present application provides a method, a device, and a terminal for determining the strength of a high-water material filling body in a coal mine. By acquiring the basic data of the coal seam in the working face. Among them, the basic data of the coal seam in the working face includes: the key stratum height, the caving zone height, the working face length, the coal seam thickness, the coal seam dip angle, the roof compressive strength, and the roof tensile strength, which improves the scientificity of analysis and calculation. Calculate the basic strength and the safety factor respectively according to the basic data of the coal seam in the working face, and measure the maximum load that the coal seam and the roof can bear and the safety of working face mining respectively. Calculate the strength requirement of the filling body according to the basic strength and the safety factor to determine the minimum strength standard that the filling material needs to reach to ensure the stability and safety of the working face. By calculating the strength requirement in real time, the embodiment of the present application can dynamically adjust the ratio of the filling body according to the occurrence conditions of the coal seam and the changes in the working face mining conditions, significantly improving the accuracy of the filling body strength calculation, and further improving the filling efficiency of the filling body. Through precise calculation and timely ratio adjustment, resource waste can be effectively avoided, and the safety and economy of coal mine mining can be ensured. Description of the Drawings

[0032] To more clearly illustrate the technical solutions in the embodiments of the present application, the following will briefly introduce the accompanying drawings required for description in the embodiments or the prior art. Obviously, the accompanying drawings in the following description are only some embodiments of the present application. For those of ordinary skill in the art, other drawings can be obtained based on these drawings without creative efforts.

[0033] Figure 1 It is a flowchart of the implementation of a method for determining the strength of a high-water material filling body in a coal mine provided by an embodiment of the present application;

[0034] Figure 2 It is a schematic structural diagram of a device for determining the strength of a high-water material filling body in a coal mine provided by an embodiment of the present application;

[0035] Figure 3 It is a schematic structural diagram of a terminal provided by an embodiment of the present application. Detailed implementation manners

[0036] In the following description, specific details such as specific system structures and technologies are presented for the purpose of illustration rather than limitation, so as to thoroughly understand the embodiments of the present application. However, those skilled in the art should clearly understand that the present application can also be implemented in other embodiments without these specific details. In other cases, detailed descriptions of well-known systems, devices, circuits, and methods are omitted to avoid unnecessary details from interfering with the description of the present application.

[0037] The terms "first", "second", etc. in the specification, claims, and the above accompanying drawings of the embodiments of the present application are used to distinguish similar objects and do not necessarily describe a specific order or sequence. It should be understood that such data can be interchanged under appropriate circumstances for the embodiments of the present application described herein. In addition, the terms "including" and "having" and any variations thereof are intended to cover non-exclusive inclusion.

[0038] Unless otherwise specified, the term "plurality" means two or more. The character " / " indicates that the objects before and after are in an "or" relationship. For example, A / B means: A or B. The term "and / or" is a description of the associated relationship of an object and indicates that three relationships can exist. For example, A and / or B means: A or B, or, A and B these three relationships.

[0039] The terms used in this application are only for describing the embodiments and do not limit the claims. As used in the description of the embodiments and claims, unless the context clearly indicates otherwise, the singular forms "a", "an", and "the" are intended to include the plural forms as well. Similarly, the term "and / or" as used in this application refers to any and all possible combinations including one or more of the associated listed items. Additionally, when used in this application, the term "comprise" and its variants "comprises" and / or "comprising" etc. mean the presence of the stated features, wholes, steps, operations, elements, and / or components, but do not exclude the presence or addition of one or more other features, wholes, steps, operations, elements, components, and / or groups of these. Without further limitation, an element defined by the statement "comprising one..." does not exclude the presence of additional identical elements in the process, method, or device comprising the element.

[0040] In this application, what each embodiment focuses on explaining can be the differences from other embodiments, and the same or similar parts among the various embodiments can be referred to each other. For the methods, products, etc. disclosed in the embodiments, if they correspond to the method part disclosed in the embodiments, the relevant parts can be referred to the description of the method part.

[0041] To make the objectives, technical solutions, and advantages of this application clearer, the following will be described through specific embodiments in conjunction with the accompanying drawings.

[0042] Figure 1 is the implementation flowchart of the method for determining the strength of the high-water material filling body in a coal mine provided by an embodiment of this application. As Figure 1 shown, the method includes the following steps:

[0043] S101, obtain the basic data of the coal seam in the working face; wherein, the basic data of the coal seam in the working face includes: the height of the key stratum, the height of the caving zone, the length of the working face, the thickness of the coal seam, the dip angle of the coal seam, the compressive strength of the roof, and the tensile strength of the roof.

[0044] The execution subject of each embodiment of this application can be a device with data processing functions such as a server, a processor, a microprocessor, etc. In the actual implementation process, the specific implementation manner of the execution subject can be selected according to actual needs, and this embodiment does not make special limitations on this, as long as it is a device with data processing functions. For the convenience of understanding, a control terminal is taken as an example for explanation. The control terminal includes at least one processor and one display. The processor can calculate the strength requirements in real time according to the changes in the coal seam occurrence conditions and the working face mining conditions, display them, and then transmit them to the filling station for proportion adjustment.

[0045] In the specific implementation process, for the key stratum height and the caving zone height, relevant data can be obtained from the geological exploration report, which are usually based on the detailed investigation and analysis of the coal seam geological structure. For example, methods such as drilling and geophysical exploration are used to determine the distribution and characteristics of different rock strata, so as to calculate the key stratum height and the caving zone height.

[0046] The working face length can be obtained from the engineering design drawings of the mine or on-site measurement data. During the mine planning and construction stage, the specific dimension parameters of each working face will be determined, and these parameters will be recorded in relevant drawings and documents.

[0047] The coal seam thickness is measured by drilling core sampling or underground measurement equipment. Drilling core sampling can directly obtain the thickness information of the coal seam, and some high-precision measurement instruments underground, such as laser rangefinders, can monitor the change of the coal seam thickness in real time during the coal mining process.

[0048] The coal seam dip angle can be measured underground using a geological compass. The surveyors measure the angle between the coal seam plane and the horizontal plane at different positions, and then take the average value or determine the appropriate dip angle data according to specific requirements.

[0049] The roof compressive strength and roof tensile strength can be obtained through indoor mechanical tests on roof rock samples. During the geological exploration process, roof rock samples are collected, and then compressive and tensile tests are carried out on equipment such as pressure testing machines in the laboratory, and the corresponding strength data are recorded.

[0050] By obtaining a number of basic data of the working face coal seam, the data error is reduced. It is more accurate than the traditional estimation method. Based on these accurate data for subsequent calculations, the calculation results of the basic strength, safety factor, and filling body strength requirements are more reliable, providing a scientific and accurate basis for the filling operation of the coal mining face.

[0051] S102, calculate the basic strength and safety factor respectively according to the basic data of the working face coal seam.

[0052] S103, calculate the filling body strength requirement according to the basic strength and safety factor.

[0053] The accurate calculation of the filling body strength requirement helps to ensure that the filling body can effectively support the roof in the coal mining face and prevent safety accidents such as roof caving. The reasonable calculation of the basic strength and safety factor can fully consider the complexity of the coal seam geological conditions, enable the filling body to adapt to different stress environments, guarantee the life safety of coal mining workers and the normal operation of equipment, and reduce the safety risks during the coal mining process.

[0054] In the specific implementation process, when the working face has a large range, the working face conditions in different areas (such as the working face length, coal seam dip angle, and coal thickness change) will be different. Calculate the filling body strength in real time according to the change of the working face conditions, ensure the filling effect, and achieve the economic optimum by adjusting the ratio in real time.

[0055] According to the accurately calculated filling body strength requirements, the filling materials can be accurately selected and their ratios can be determined, avoiding the overuse or underuse of filling materials. For example, if the calculation of the filling body strength requirements is inaccurate, it may lead to the use of high-grade cement or a large amount of high-water materials, resulting in waste of resources; or the use of filling materials with insufficient strength, affecting the stability of the coal mining face and requiring additional reinforcement measures, increasing costs. Through this solution, the optimized utilization of filling materials can be realized, the coal mining cost can be reduced, and the economic benefits can be improved.

[0056] In this embodiment, by obtaining the basic data of the coal seam in the working face. Among them, the basic data of the coal seam in the working face include: the height of the key stratum, the height of the caving zone, the working face length, the coal seam thickness, the coal seam dip angle, the roof compressive strength, and the roof tensile strength, which improves the scientific nature of the analysis and calculation. Calculate the basic strength and safety factor according to the basic data of the coal seam in the working face, respectively measuring the maximum load that the coal seam and the roof can bear and the safety of the working face mining. Calculate the filling body strength requirements according to the basic strength and safety factor to determine the minimum strength standard that the filling materials need to reach to ensure the stability and safety of the working face. By calculating the strength requirements in real time in the embodiment of the present application, the ratio of the filling body can be dynamically adjusted according to the occurrence conditions of the coal seam and the change of the working face mining conditions, significantly improving the accuracy of the filling body strength calculation, and then improving the filling efficiency of the filling body. Through precise calculation and timely ratio adjustment, the waste of resources can be effectively avoided, and the safety and economy of coal mine mining can be ensured.

[0057] In actual operation, in order to ensure the smooth progress of the filling process, after confirming that the coal mine filling body reaches the required strength, a suitable filling plan must be designed according to the specific working conditions on site, and the filling structure must be accurately controlled to complete the filling task.

[0058] In a possible implementation manner, the method further includes:

[0059] Substitute the filling body strength requirements into the strength-water solid ratio relationship curve to determine the corresponding water solid ratio, so as to instruct the grouting station to adjust the real-time ratio of the filling body slurry according to the water solid ratio;

[0060] Among them, the strength-water solid ratio relationship curve is drawn according to the test results of the filling body strength of high-water materials with a ratio of 1:1 to 8:1.

[0061] Specifically, systematic strength tests were conducted on high-water material filling bodies with different water-solid ratios from 1:1 to 8:1 in a laboratory environment. During the test process, the ratio of high-water material to water was precisely regulated, and standardized molds were used to form filling body specimens. After the specimens were cured to the specified time nodes (such as 7 days, 28 days, etc.) according to the standard, a universal material testing machine was used to conduct compressive strength tests, and the strength data of the filling bodies under various water-solid ratios were systematically recorded. Then, based on the test results, with the water-solid ratio set as the horizontal axis and the filling body strength set as the vertical axis, a relationship curve graph between strength and water-solid ratio was carefully drawn and stored in the database of the control terminal or grouting station for future retrieval and practical application.

[0062] In addition, during the specific implementation process, the requirement for filling body strength testing is to conduct a test every 100t of material. Before each filling, the parameters required for calculating the filling demand strength need to be re-entered to calculate the optimal water-solid ratio.

[0063] In this embodiment, the control terminal receives the filling body strength demand data calculated previously. It queries and matches the data in the stored relationship curve database of strength and water-solid ratio, and determines the water-solid ratio value corresponding to the filling body strength demand through an interpolation algorithm or curve fitting algorithm. According to the determined water-solid ratio, a filling body slurry ratio adjustment plan is formulated. Finally, the filling body slurry ratio adjustment plan is sent to the grouting station through a wired or wireless communication network (such as industrial Ethernet, Wi-Fi, or 4G / 5G, etc.).

[0064] In other possible implementation methods, the grouting station receives the filling body strength demand data sent by the control terminal. In the computer system or intelligent controller inside the grouting station, the relationship curve data of strength and water-solid ratio are also stored. Using the built-in calculation program, according to an algorithm similar to that of the control terminal, the corresponding water-solid ratio is determined based on the filling body strength demand. Then, according to the determined water-solid ratio, the supply ratio of high-water material and water in the grouting equipment is automatically adjusted to achieve real-time ratio adjustment of the filling body slurry. At the same time, the grouting station can also control the entire grouting process according to its own monitoring system, including the monitoring and adjustment of parameters such as grouting pressure and grouting flow rate, to ensure the smooth progress of the filling operation.

[0065] In this embodiment, through the pre-established relationship curve of strength and water-solid ratio, whether it is calculated and adjusted by the control terminal or the grouting station, the water-solid ratio can be accurately determined according to the specific filling body strength demand, thereby realizing the precise ratio of the filling body slurry. This helps to ensure the quality stability of the filling body, enabling it to play the expected supporting and filling roles in the coal mining face and improving the safety and reliability of coal mining operations.

[0066] In a possible implementation, the basic strength and safety factor are calculated respectively according to the basic data of the working face coal seam, including:

[0067] Calculate the basic strength according to the key stratum height and caving zone height.

[0068] In a possible implementation, the basic strength calculation formula is:

[0069] Q1 = γB(H 关 - H 垮 ) + γH 垮

[0070] where γ is the rock density, B is the support coefficient of the filling body to the roof, and its value range is between 0 and 1, H 关 is the key stratum height, and H 垮 is the caving zone height.

[0071] In other possible implementations, determine the basic strength correction value according to the actual working conditions and operation parameters of the working face. For example, due to factors such as local geological anomalies or special engineering requirements, determine the basic strength correction value ΔQ (which can be determined according to expert experience, numerical simulation results or on-site test data). Accordingly, the basic strength calculation formula is:

[0072] Q1 = γB(H 关 - H 垮 ) + γH 垮 + ΔQ

[0073] where γ is the rock density, B is the support coefficient of the filling body to the roof, and its value range is between 0 and 1, H 关 is the key stratum height, H 垮 is the caving zone height, and ΔQ is the basic strength correction value.

[0074] In a possible implementation, the basic strength and safety factor are calculated respectively according to the basic data of the working face coal seam, including:

[0075] Calculate the safety factor according to the working face length, coal seam thickness, coal seam dip angle, roof compressive strength and roof tensile strength.

[0076] In a possible implementation, the safety factor calculation formula is:

[0077] K = K 长 + K 倾 + K 厚 + K 压 + K 拉

[0078] where K 长 、K 倾 、K 厚, K 压 , K 拉 are coefficients obtained by comparing the working face length, coal seam thickness, coal seam dip angle, roof compressive strength, and roof tensile strength with their respective reference values.

[0079] Among them, the working face length, coal seam thickness, coal seam dip angle, roof compressive strength, and roof tensile strength are respectively compared with their respective reference values. For example, the reference value of the working face length is set as L 基 . When the actual working face length is L, calculate K 长 =(L - L 基 ) / L 基 ; Similarly, calculate K 倾 (related to the coal seam dip angle), K 厚 (related to the coal seam thickness), K 压 (related to the roof compressive strength), K 拉 (related to the roof tensile strength).

[0080] In this embodiment, various influencing factors are considered, such as different working face lengths, coal seam thicknesses, dip angles, and mechanical properties of the roof, etc. The basic strength is corrected through the calculation of the safety factor. Personalized filling body strength schemes can be designed according to different coal seam occurrence conditions and engineering requirements. For example, for a working face with a large coal seam dip angle, the filling body strength is appropriately increased through the adjustment of K 倾 to better resist the downward sliding force of the roof along the inclined direction, effectively prevent the occurrence of roof accidents, and improve the safety and adaptability of coal mining operations.

[0081] In a possible implementation manner, the calculation formula for the filling body strength requirement is:

[0082] Q = KQ 1

[0083] where K is the safety factor; Q 1 is the basic strength.

[0084] In this embodiment, the accurate calculation of the filling body strength requirement helps to rationally allocate filling materials. It will not cause material waste due to excessive filling body strength, nor will it affect the safety of coal mining operations and the filling effect of the goaf due to insufficient strength. On the premise of ensuring the project quality, the optimized utilization of filling materials is realized, the material cost and related costs such as transportation and storage are reduced, and the economic benefits of coal mining are improved. The filling body strength requirement obtained based on scientific calculation can provide a reliable design basis for the entire filling project. From the preparation of the filling body slurry to the parameter control during the filling construction process, there are clear target values. Engineering problems such as roof subsidence and incomplete filling of the goaf caused by unstable or mismatched filling body strength are reduced, and the overall reliability and stability of the coal mining project are improved.

[0085] The solution of this application is described with a specific embodiment.

[0086] In a certain mine, the coal seam depth of the 2931 working face is 750 m, the coal seam thickness is 3.5 m, the dip angle is 8°, and it is mined in the upward dip direction. The average unit weight of the roof is 27 kN / m³, the uniaxial compressive strength of the roof sandstone is 67 MPa, the uniaxial compressive strength is 26 MPa, and the working face length is 120 m. According to the coal mine mining data, the key stratum height is 65 m, and the caving zone height is 12 m. The support coefficient of the filling body to the roof is taken as 0.8.

[0087] Substituting into the safety factor calculation formula, we can get:

[0088] K = K 长 + K 倾 + K 厚 + K 压 + K 拉 = (120 - 120) / 120 + (8 - 5) / 5 + (3.5 - 3) / 3 +

[0089] (67 - 50) / 50 + (20 - 26) / 26

[0090] = 0.875

[0091] Substituting into the basic strength calculation formula, we can get:

[0092] Q1 = γB(H 关 - H 垮 ) + γH 垮 = 27 * 0.8 * (65 - 12) + 27×12 = 1.47 Mpa

[0093] Substituting into the filling body strength requirement calculation formula, we can get:

[0094] Q = kQ 1 = 0.875 * 1.47 = 1.29 Mpa

[0095] That is, the calculation result of the filling body strength requirement is 1.29 Mpa.

[0096] The strength test results of a certain batch of high-water material filling bodies are shown in the table:

[0097] Water-solid ratio Strength / MPa 1 5.38 2 4.22 3 2.05 4 1.18 5 0.75 6 0.58 7 0.45 8 0.28

[0098] Through linear analysis, the relationship between the strength of this batch of materials and the water-solid ratio is:

[0099] y = -0.0133x 3 + 0.3389x 2 - 2.8254x + 8.09

[0100] R2 = 0.9824

[0101] According to the inverse calculation of this formula, when the water-solid ratio is 4.1:1, the strength of the filling body is 1.286 MPa.

[0102] The water-solid ratio calculated underground is transmitted to the underground or the ground grouting station. Before filling for each shift, the grouting station prepares the filling body slurry according to this water-solid ratio to achieve the optimal ratio.

[0103] It should be understood that the sequence numbers of the steps in the above embodiments do not imply the order of execution. The execution order of each process should be determined according to its function and internal logic, and should not constitute any limitation to the implementation process of the embodiments of the present application.

[0104] The following is the device embodiment of the present application. For the details not described in detail, reference can be made to the corresponding method embodiments above.

[0105] Figure 2 is a schematic structural diagram of a device for determining the strength of a high-water material filling body in a coal mine provided by an embodiment of the present application. As Figure 2 shown, for the convenience of description, only the parts related to the embodiments of the present application are shown. As Figure 2 shown, the device includes:

[0106] An acquisition module 401, configured to acquire the basic data of the coal seam in the working face; wherein, the basic data of the coal seam in the working face includes: the height of the key stratum, the height of the caving zone, the length of the working face, the thickness of the coal seam, the dip angle of the coal seam, the compressive strength of the roof, and the tensile strength of the roof;

[0107] A first calculation module 402, configured to calculate the basic strength and the safety factor respectively according to the basic data of the coal seam in the working face;

[0108] A second calculation module 403, configured to calculate the strength requirement of the filling body according to the basic strength and the safety factor.

[0109] In a possible implementation manner, the method further includes:

[0110] Substitute the strength requirement of the filling body into the strength-water solid ratio relationship curve to determine the corresponding water-solid ratio, so as to instruct the grouting station to adjust the real-time ratio of the filling body slurry according to the water-solid ratio;

[0111] Wherein, the strength-water solid ratio relationship curve is drawn according to the test results of the strength of the high-water material filling body with a ratio of 1:1 to 8:1.

[0112] In a possible implementation manner, the first calculation module 402 is specifically configured to calculate the basic strength according to the height of the key stratum and the height of the caving zone.

[0113] In a possible implementation, the formula for the basic strength is as follows:

[0114] Q1 = γB(H 关 - H 垮 )

[0115] where γ is the unit weight of the rock stratum, B is the support coefficient of the filling body for the roof, and its value range is between 0 and 1, H 关 is the key stratum height, and H 垮 is the caving zone height.

[0116] In a possible implementation, the first calculation module 402 is specifically configured to calculate the safety factor according to the working face length, coal seam thickness, coal seam dip angle, roof compressive strength, and roof tensile strength.

[0117] In a possible implementation, the formula for the safety factor is as follows:

[0118] K = K 长 + K 倾 + K 厚 + K 压 + K 拉

[0119] where K 长 , K 倾 , K 厚 , K 压 , K 拉 are coefficients obtained by comparing the working face length, coal seam thickness, coal seam dip angle, roof compressive strength, roof tensile strength with their respective reference values.

[0120] In a possible implementation, the formula for the strength requirement of the filling body is as follows:

[0121] Q = KQ 1

[0122] where K is the safety factor; Q 1 is the basic strength.

[0123] Figure 3 is a schematic structural diagram of a terminal provided by an embodiment of the present application. As Figure 3 shown, the terminal 5 of this embodiment includes: a processor 50, a memory 51, and a computer program 52 stored in the memory 51 and executable on the processor 50. When the processor 50 executes the computer program 52, it implements the steps in the above-mentioned embodiments of the method for determining the strength of the high-water material filling body in coal mines, such as Figure 1 the steps shown. Or, when the processor 50 executes the computer program 52, it implements the functions of each module / unit in the above-mentioned device embodiments, such as Figure 2Functions of the modules shown

[0124] Exemplarily, the computer program 52 may be divided into one or more modules / units, which are stored in the memory 51 and executed by the processor 50 to complete this application. The one or more modules / units may be a series of computer program instruction segments capable of performing specific functions, and these instruction segments are used to describe the execution process of the computer program 52 in the terminal 5. For example, the computer program 52 may be divided into Figure 2 the modules shown

[0125] The terminal 5 may be a computing device such as a desktop computer, a notebook, a palm computer, and a cloud server. The terminal 5 may include, but is not limited to, a processor 50 and a memory 51. Those skilled in the art can understand that Figure 3 these are merely examples of the terminal 5 and do not constitute a limitation on the terminal 5. It may include more or fewer components than shown in the figure, or combine certain components, or have different components. For example, the terminal may further include input / output devices, network access devices, a bus, etc.

[0126] The so-called processor 50 may be a central processing unit (CPU), or may also be other general-purpose processors, digital signal processors (DSPs), application specific integrated circuits (ASICs), field-programmable gate arrays (FPGAs), or other programmable logic devices, discrete gate or transistor logic devices, discrete hardware components, etc. The general-purpose processor may be a microprocessor or the processor may also be any conventional processor, etc.

[0127] The memory 51 may be an internal storage unit of the terminal 5, such as the hard disk or memory of the terminal 5. The memory 51 may also be an external storage device of the terminal 5, such as a plug-in hard disk equipped on the terminal 5, a smart media card (SMC), a secure digital (SD) card, a flash card, etc. Further, the memory 51 may also include both the internal storage unit and the external storage device of the terminal 5. The memory 51 is used to store the computer program and other programs and data required by the terminal 5. The memory 51 may also be used to temporarily store data that has been output or will be output.

[0128] Those skilled in the art can clearly understand that, for the convenience and conciseness of description, only the division of the above-mentioned functional units and modules is used as an example. In actual applications, the above-mentioned functions can be allocated to different functional units and modules according to needs, that is, the internal structure of the device can be divided into different functional units or modules to complete all or part of the functions described above. Each functional unit and module in the embodiments can be integrated into a processing unit, or each unit can exist physically alone, or two or more units can be integrated into one unit. The above-mentioned integrated unit can be implemented in the form of hardware or in the form of a software functional unit. In addition, the specific names of the functional units and modules are only for the convenience of mutual distinction and do not limit the protection scope of this application. The specific working processes of the units and modules in the above system can refer to the corresponding processes in the foregoing method embodiments and will not be elaborated herein.

[0129] In the above embodiments, the descriptions of the respective embodiments have their own emphases. For the parts not detailed or recorded in a certain embodiment, reference can be made to the relevant descriptions of other embodiments.

[0130] Those of ordinary skill in the art can realize that the units and algorithm steps of each example described in combination with the embodiments disclosed in this application can be implemented by electronic hardware, or by a combination of computer software and electronic hardware. Whether these functions are executed in a hardware or software manner depends on the specific application and design constraints of the technical solution. Professional technicians can use different methods to implement the described functions for each specific application, but such implementation should not be considered to exceed the scope of this application.

[0131] In the embodiments provided in this application, it should be understood that the disclosed device / terminal and method can be implemented in other ways. For example, the device / terminal embodiments described above are only illustrative. For example, the division of the modules or units is only a logical function division, and there can be other division methods in actual implementation. For example, multiple units or components can be combined or integrated into another system, or some features can be ignored or not executed. Another point is that the displayed or discussed couplings or direct couplings or communication connections to each other can be through some interfaces, and the indirect couplings or communication connections of the devices or units can be in an electrical, mechanical or other form.

[0132] The units described as separate components may or may not be physically separated, and the components displayed as units may or may not be physical units, that is, they can be located in one place or distributed to multiple network units. Some or all of the units can be selected according to actual needs to achieve the purpose of the solution of this embodiment.

[0133] In addition, in each embodiment of the present application, each functional unit can be integrated into a processing unit, or each unit can exist physically alone, or two or more units can be integrated into one unit. The above-mentioned integrated unit can be implemented in the form of hardware or in the form of a software functional unit.

[0134] If the integrated module / unit is implemented in the form of a software functional unit and sold or used as an independent product, it can be stored in a computer-readable storage medium. Based on this understanding, to implement all or part of the processes in the above-mentioned embodiment methods of the present application, it can also be completed by instructing relevant hardware through a computer program. The computer program can be stored in a computer-readable storage medium. When the computer program is executed by a processor, it can implement the steps of the above-mentioned embodiments of the method for determining the strength of the high-water material filling body in each coal mine. Among them, the computer program includes computer program code, and the computer program code can be in the form of source code, object code, executable file or some intermediate form, etc. The computer-readable medium can include: any entity or device that can carry the computer program code, recording medium, USB flash drive, mobile hard disk, magnetic disk, optical disc, computer memory, read-only memory (ROM), random access memory (RAM), electrical carrier signal, telecommunication signal, and software distribution medium, etc.

[0135] The above-mentioned embodiments are only used to illustrate the technical solutions of the present application, rather than to limit them; although the present application 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 recorded in the foregoing embodiments, or perform equivalent replacements on some of the technical features; and these modifications or replacements do not make the essence of the corresponding technical solutions deviate from the spirit and scope of the technical solutions of the embodiments of the present application, and should all be included in the protection scope of the present application.

Claims

1. A method for determining the strength of a high-water-density material filling body in a coal mine, characterized in that: include: Obtaining basic data of coal seams at the working face; wherein the basic data of coal seams at the working face include: key layer height, collapse zone height, working face length, coal seam thickness, coal seam inclination, roof compressive strength and roof tensile strength; Calculate the foundation strength and safety factor respectively according to the coal seam foundation data of the working face; The filling body strength requirement is calculated based on the foundation strength and safety factor.

2. The method for determining the strength of a coal mine high-water material filling body according to claim 1, characterized in that: Also includes: Substituting the filling body strength requirement into the strength-water-solid ratio relationship curve to determine the corresponding water-solid ratio, so as to instruct the grouting station to adjust the proportion of the filling body slurry in real time according to the water-solid ratio; The strength-water-to-solid ratio relationship curve is drawn based on the test results of the strength of high-water material filling bodies with a ratio of 1:1 to 8:

1.

3. The method for determining the strength of a coal mine high-water material filling body according to claim 1, characterized in that: The foundation strength and safety factor are calculated according to the coal seam foundation data of the working face, including: The foundation strength is calculated based on the critical layer height and the collapse zone height.

4. The method for determining the strength of a coal mine high-water material filling body according to claim 3, characterized in that: The foundation strength calculation formula is: Q1=γB(H 关 -H 垮 )+γH 垮 Among them, γ is the bulk density of rock formation, B is the support coefficient of filling body to roof, ranging from 0 to 1, H 关 is the critical layer height, H 垮 The height of the collapse zone.

5. The method for determining the strength of a coal mine high-water material filling body according to claim 1, characterized in that: The foundation strength and safety factor are calculated according to the coal seam foundation data of the working face, including: The safety factor is calculated based on the length of the working face, coal seam thickness, coal seam inclination, roof compressive strength and roof tensile strength.

6. The method for determining the strength of a coal mine high-water material filling body according to claim 5, characterized in that: The safety factor calculation formula is: K=K 长 +K 倾 +K 厚 +K 压 +K 拉 Among them, K 长 , K 倾 , K 厚 , K 压 , K 拉 They are the coefficients obtained by comparing the working face length, coal seam thickness, coal seam inclination, roof compressive strength and roof tensile strength with their respective benchmark values.

7. The method for determining the strength of a coal mine high-water material filling body according to claim 1, characterized in that: The required strength calculation formula for the filling body is: Q=KQ1 Among them, K is the safety factor; Q1 is the basic strength.

8. A device for determining the strength of high-water-density material filling in a coal mine, characterized in that: include: An acquisition module is used to acquire basic data of coal seams at a working face; wherein the basic data of coal seams at a working face include: key layer height, collapse zone height, working face length, coal seam thickness, coal seam inclination, roof compressive strength and roof tensile strength; The first calculation module is used to calculate the foundation strength and safety factor according to the coal seam foundation data of the working face; The second calculation module is used to calculate the strength requirement of the filling body according to the foundation strength and the safety factor.

9. A terminal comprising a memory, a processor, and a computer program stored in the memory and capable of running on the processor, characterized in that: When the processor executes the computer program, the steps of the method according to any one of claims 1 to 7 are implemented.

10. A computer-readable storage medium storing a computer program, characterized in that: When the computer program is executed by a processor, the steps of the method as claimed in any one of claims 1 to 7 are implemented.

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