A method for determining the mining-filling balance considering the dilatancy of ore rock and the settlement of filling slurry

Abstract

The present application relates to the mining technical field, and is a kind of method for determining mining-filling balance quantity considering ore rock dilatancy and filling slurry settlement, comprising: calculating the volume of empty area formed after blasting according to the actual daily ore output of mine combined with dilatancy coefficient;Using the relationship between dilatancy coefficient and rock quality index, the dilatancy coefficient is corrected;Based on the principle of mining-filling balance, considering the concentration of slurry, solidification and settlement factors, the effective filling volume is calculated;Comprehensively considering the influence of site stope constraints, temperature and humidity, filling height and slurry concentration on the settlement phenomenon of filling slurry, the settlement coefficient after the consolidation and shrinkage of filling slurry is corrected;Using the corrected dilatancy coefficient and settlement coefficient, a mining-filling balance model is constructed;According to the principle of conservation of mass, the tailings yield boundary point when mining-filling balance is achieved is calculated.The present application realizes the coordinated operation between mining and filling process by guiding the balance of mining-filling coordination process for mine, and quantifies the relationship between mining and filling through actual formula calculation.

Description

Technical Field

[0001] This invention relates to the field of mining technology, and in particular to a method for determining the mining-filling balance considering the swelling of ore and rock and the shrinkage of filling slurry. Background Technology

[0002] With the continuous advancement of green mine construction in my country, zero-waste mining has gradually evolved from a traditional conceptual and peripheral technology into a new and cutting-edge application direction in the mining industry. Achieving less or zero waste discharge during mineral processing is one of the core objectives of waste reduction and zero-waste mining. Achieving this objective requires meeting multiple technical conditions, including the compatibility of ore deposit geological grades, compliance with mining technology standards, optimization of mining methods, control of mineral processing recovery rates, and improvement of backfilling processes. Among these, balanced management of mining and backfilling is a key technical link in ensuring the achievement of these objectives.

[0003] In the field of mining-filling balance calculation in metallic and non-metallic mines, current calculation methods, besides relying on classical formulas, have not yet incorporated the two key influencing parameters of ore and rock swelling coefficient and slurry shrinkage coefficient. Furthermore, they fail to consider dynamic factors such as on-site mining intensity, geological conditions, and slurry mix ratios. This lack of scientific basis for mining-filling balance control leads to discrepancies between calculated results and actual engineering conditions, making it difficult to meet the requirements for accurate filling. Therefore, there is a need for a mining-filling balance determination method that integrates multi-dimensional actual influencing factors on-site, providing a new technical solution for accurate mining-filling balance calculation. Summary of the Invention

[0004] To address the aforementioned technical problems, this invention provides a method for determining the mining-filling balance quantity, taking into account the swelling of ore and rock after blasting and the volume changes after the consolidation and shrinkage of the filling slurry. By considering the volume changes resulting from the swelling of ore and rock after blasting and the consolidation and shrinkage of the filling slurry, this invention not only introduces the swelling coefficient and the shrinkage coefficient, but also incorporates influencing factors such as on-site mining intensity, slurry ratio, and geological conditions during the derivation process, verifying the results with on-site data to achieve precise optimization of the traditional formula.

[0005] The technical means employed in this invention are as follows: A method for determining the mining-filling balance considering ore fragmentation and rock swelling as well as the settling of backfill slurry includes: calculating the volume of the void formed after blasting based on the actual daily ore output of the mine and the fragmentation coefficient; correcting the fragmentation coefficient using the relationship between the fragmentation coefficient and rock quality indicators; calculating the effective backfilling volume based on the mining-filling balance principle, considering slurry concentration and solidification shrinkage factors; correcting the settling coefficient of the backfilling slurry after consolidation shrinkage by comprehensively considering the influence of on-site stope constraints, temperature and humidity, backfilling height, and slurry concentration on the settling phenomenon of the backfilling slurry; constructing a mining-filling balance model using the corrected fragmentation coefficient and settling coefficient; and calculating the tailings yield threshold for achieving the mining-filling balance based on the principle of material mass conservation.

[0006] Furthermore, the volume of the empty area is calculated as follows:

[0007] in, This represents the actual volume of the empty area formed in the mining area. This represents the total amount of ore mined in a single day. Let m be the ore output in the m-th single extraction; m is the number of extractions per day. Ore recovery rate; The volume of the goaf after blasting is determined by the coefficient of ore fragmentation. This represents the density of the ore.

[0008] Furthermore, the fragmentation coefficient is negatively correlated with the rock quality index RQD, and the negative correlation is fitted using an exponential function:

[0009] Considering the explosive consumption and mesh density in the blasting parameters, the fragmentation coefficient is corrected as follows:

[0010] in, This represents the coefficient of rupture before correction. This represents the corrected coefficient of thermal expansion. a, b, c The fitting parameters were obtained by using the ratio of the original volume of the ore and rock to the loose volume after blasting. q For the unit consumption of explosives, d The coefficient representing the effect of explosive consumption per unit; w For mesh density, This is the influence coefficient of the mesh density.

[0011] Furthermore, the effective filling volume is calculated as follows:

[0012] in, The filling rate; The effective filling volume per day; The total daily volume of filling slurry to be delivered; the hourly capacity of the filling system. This refers to the effective filling time per day. This represents the volume percentage of solid particles. The shrinkage coefficient is the corrected shrinkage coefficient after consolidation shrinkage of the filling slurry.

[0013] Furthermore, the shrinkage coefficient of the filling slurry after consolidation shrinkage is corrected based on the indoor foundation shrinkage coefficient and environmental factors at the mining site. Calculated based on the initial pouring height of the grout, the height of the bleed layer after stabilization, and the actual height of the filling material after bleed stabilization and curing:

[0014] in, Indicates the initial pouring height of the slurry. This indicates the height of the aquifer after the aquifer has stabilized. This indicates the actual height of the filling material after it has been stabilized and cured to prevent water seepage. The environmental factors at the stope site include the stope boundary, temperature and humidity, filling height, and slurry concentration. The corrected shrinkage coefficient is expressed as:

[0015] in, This represents the corrected shrinkage coefficient. This represents the boundary constraint coefficient of the mining area. This represents the temperature and humidity correction factor. This indicates the filling height correction factor. This represents the slurry concentration correction factor.

[0016] Furthermore, the sampling-supplementation balance model is as follows:

[0017] The filling-fill balance means that the effective volume of the filling body is equal to the volume of the void formed.

[0018] Furthermore, based on the aforementioned principle of material mass conservation, the fundamental relationships involved in the mineral processing technology are established. Assuming the total mass of the raw ore is the sum of the concentrate mass and the tailings mass, the concentrate yield is derived using the principle of useful component mass conservation, and the actual tailings yield is calculated. Represented as:

[0019] in, Indicates the grade of the raw ore. Indicates the grade of the concentrate. Indicates the grade of tailings; Based on the aforementioned material conservation principle, when all the tailings generated are used for backfilling the stope and there is no surplus, a zero-waste mining-backfilling balance is achieved. By establishing an equation relating tailings yield as the dependent variable when mining-backfilling balance is achieved, the tailings yield threshold for reaching mining-backfilling balance is calculated:

[0020]

[0021] in, To achieve the tailings yield threshold at the point of production-supply balance, The density of the slurry; express The average ash-sand ratio of the tailings This indicates the types of tailings with different ash-to-sand ratios. For the first The ash-to-sand ratio of tailings; When filling with layered cementitious material, the first The weight corresponding to the tailings with different ash-sand ratios.

[0022] Compared with the prior art, the present invention has the following advantages: The present invention provides a method for determining the mining-filling balance considering the swelling of ore and the settling of filling slurry. By constructing a mining-filling balance analysis model for metal and non-metal mines, it establishes the causal relationship between various factors in the mining-filling balance system, showing that mining, filling, and mineral processing influence each other in an interconnected manner. Based on this, a dynamic mining-filling balance analysis model based on the spatiotemporal dimension is established. By adjusting the matching relationship between filling capacity, mining capacity, and mineral processing capacity, the dynamic equality of the goaf volume and the filling volume is achieved. The formula derivation process is based on the fundamental logic that "the actual volume of the formed goaf = the effective filling volume of the filling body".

[0023] This invention provides a method for determining the mined-filling balance volume considering ore fragmentation and rock swelling as well as backfill slurry shrinkage. In calculating the actual goaf volume formed in a mine stope, the method considers the volume expansion caused by ore fragmentation after blasting, introducing an expansion coefficient. By considering different ore and rock properties in different mines, an RQD value is introduced to correct the expansion coefficient. Simultaneously, different blasting parameters are considered to further correct the expansion coefficient, thus determining the actual goaf volume. Through laboratory experiments and considering different field conditions (including stope constraints, temperature and humidity, backfilling height, and slurry concentration), the method calculates the shrinkage of the backfill slurry under different working conditions due to consolidation shrinkage, introducing and correcting a shrinkage coefficient. The method is first derived through laboratory experiments. The internal foundation shrinkage coefficient is further corrected based on actual site conditions to accurately calculate the actual effective filling volume of the void after the actual consolidation shrinkage of the filling slurry. The tailings yield in the backfilling mining method of metal mines is derived based on the recovery rate of useful components in the ore and the grade relationship among the raw ore, concentrate, and tailings. The tailings yield is derived based on the conservation of materials. By establishing the relationship between the actual void volume and the effective filling volume in the mine, the relationship with the tailings yield as the dependent variable is derived. The tailings yield threshold for the mine to achieve the mining-filling balance is found. The tailings yield calculated by the mine through tailings experiments is compared and analyzed to determine whether the mine can achieve the mining-filling balance.

[0024] This invention uses the coordination of mining and backfilling processes in a mine as a guide to achieve a balanced operation, realizing coordinated operation between these processes. Through practical formula calculations, the relationship between mining and backfilling is quantified. Technically, it addresses the problems of chaotic mining and backfilling processes and low ore dressing efficiency in many mines, preventing larger open areas from being exposed due to ore dressing lagging behind mining and backfilling plans, leading to decreased stope stability and even surface subsidence. This invention patent involves the dynamic balance between mining, beneficiation, and backfilling in metal mines and is applicable to both metal and non-metal mines using tailings backfilling. The model building and calculation process is simple, and the mining speed is synchronized with the ore extraction speed. Attached Figure Description

[0025] To more clearly illustrate the technical solutions in the embodiments of the present invention or the prior art, the drawings used in the description of the embodiments or the prior art will be briefly introduced below. Obviously, the drawings described below are some embodiments of the present invention. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort.

[0026] Figure 1 This is a flowchart of the method for determining the mining-filling balance quantity in this invention, taking into account the swelling of ore and the shrinkage of filling slurry.

[0027] Figure 2 This is a schematic diagram of numerical simulation of the shrinkage of the filling slurry in an embodiment of the present invention. Detailed Implementation

[0028] It should be noted that, unless otherwise specified, the embodiments and features described in the present invention can be combined with each other. The present invention will now be described in detail with reference to the accompanying drawings and embodiments.

[0029] To make the objectives, technical solutions, and advantages of the embodiments of the present invention clearer, the technical solutions of the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of the present invention, and not all embodiments. The following description of at least one exemplary embodiment is merely illustrative and is in no way intended to limit the present invention or its application or use. Based on the embodiments of the present invention, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of the present invention.

[0030] It should be noted that the terminology used herein is for the purpose of describing particular embodiments only and is not intended to limit the scope of exemplary embodiments according to the invention. As used herein, the singular form is intended to include the plural form as well, unless the context clearly indicates otherwise. Furthermore, it should be understood that when the terms "comprising" and / or "including" are used in this specification, they indicate the presence of features, steps, operations, devices, components, and / or combinations thereof.

[0031] Unless otherwise specifically stated, the relative arrangement, numerical expressions, and values ​​of the components and steps described in these embodiments do not limit the scope of the invention. It should also be understood that, for ease of description, the dimensions of the various parts shown in the drawings are not drawn to actual scale. Techniques, methods, and devices known to those skilled in the art may not be discussed in detail, but where appropriate, such techniques, methods, and devices should be considered part of the specification. In all examples shown and discussed herein, any specific values ​​should be interpreted as merely exemplary and not as limitations. Therefore, other examples of exemplary embodiments may have different values. It should be noted that similar reference numerals and letters in the following figures denote similar items; therefore, once an item is defined in one figure, it need not be further discussed in subsequent figures.

[0032] like Figure 1 As shown, this invention provides a method for determining the mining-filling balance considering ore and rock fragmentation and backfill slurry settling, based on... Figure 1 The schematic diagrams illustrating the construction of the dynamic balance system for cemented tailings backfilling in both metallic and non-metallic mines show that mining, beneficiation, and backfilling are an organic whole that is mutually restrictive and interdependent. Fluctuations in production capacity, changes in parameters, or process disconnects in any link will directly disrupt the balance among the three, ultimately affecting the overall production efficiency and safety of the mine. This mutual influence is reflected in three core dimensions: "production capacity matching," "material flow," and "parameter coordination." An imbalance in any of these dimensions will trigger a chain reaction.

[0033] The method of this invention first calculates the volume of the void formed after blasting based on the actual daily ore output of the mine and the ore fragmentation coefficient. Considering the volumetric expansion of the ore after blasting, in calculating the actual void formed in the mining area, in addition to considering the impact of ore recovery rate, ore fragmentation also needs to be taken into account. Therefore, a ore fragmentation coefficient is introduced to correct the actual void volume formed in the mining area. In a preferred embodiment of this invention, the void volume is calculated as follows:

[0034] in, This represents the actual volume of the empty area formed in the mining area. This represents the total amount of ore mined in a single day. Let m be the ore output in the m-th single extraction; m is the number of extractions per day. Ore recovery rate; The volume of the goaf after blasting is determined by the coefficient of ore fragmentation. This represents the density of the ore.

[0035] In this invention, the volume of voids formed by mining production each day and the volume of voids effectively filled on a single day are calculated on a daily basis, rather than on an annual basis. This makes the implementation of mining-filling balance specific to each day, which is more conducive to actual mine production and void management. By introducing expansion and subsidence coefficients, the calculation of the actual void volume and the volume of effectively filled voids are corrected. Based on the mining-filling volume balance calculation, the tailings yield threshold is the point at which the mine aims to achieve mining-filling balance. At this point, the mine theoretically achieves zero tailings discharge and mining-filling balance. Based on this tailings yield threshold, the tailings yield obtained through experiments is compared. If the tailings yield obtained through experiments is not less than the calculated mining-filling balance tailings yield threshold, then the mine achieves mining-filling balance in the form of cemented tailings filling. Otherwise, true cemented tailings filling cannot be achieved, and it is necessary to consider waste rock filling, increasing the proportion of cementing materials or other materials, or replanning the entire tailings filling process.

[0036] The coefficient of fragmentation of ore after blasting in a metal mine typically requires comprehensive consideration of factors such as ore properties and blasting parameters. It can be determined through on-site testing, based on rock type, and by referring to empirical values. In the absence of on-site testing, the latter two methods are chosen for determining the coefficient of fragmentation. Generally, based on rock strength, values ​​are categorized as follows: soft rock 1.1–1.3, medium-hard rock 1.3–1.5, and hard rock 1.5–1.8. Considering that the coefficient of fragmentation is related to both rock strength and blasting, the rock's Reduction Quality Degree (RQD) is used for correction. A higher RQD value indicates greater rock integrity and strength, lower post-blast fragmentation, and a smaller coefficient of fragmentation.

[0037] The fragmentation coefficient is corrected by utilizing the relationship between the fragmentation coefficient and rock quality indicators. In a preferred embodiment of this invention, the fragmentation coefficient and the rock quality indicator RQD are negatively correlated, and an exponential function is used to fit the negative correlation.

[0038] Considering the explosive consumption and mesh density in the blasting parameters, the fragmentation coefficient is corrected as follows:

[0039] in, This represents the coefficient of rupture before correction. This represents the corrected coefficient of thermal expansion. a, b, cThe fitting parameters were obtained by using the ratio of the original volume of the ore and rock to the loose volume after blasting. q For explosive consumption per unit ( ), d The value of is the influence coefficient of explosive consumption, ranging from 0.03 to 0.05. w For mesh density ( ), The value range of the influence coefficient of the mesh density is 0.01-0.02.

[0040] Based on the principle of production-fill balance, and considering slurry concentration and solidification shrinkage, the effective filling volume is calculated. In specific implementation, as a preferred embodiment of this invention, to achieve production-fill balance, the mine must ensure that the effective volume of the filling body is equal to the actual volume of the formed void, taking into account factors such as slurry concentration and solidification shrinkage. Determined by the capacity of the filling system, and considering the total daily volume of filling slurry transported by the mine, the hourly capacity of the filling system, the daily effective filling time, and the slurry solid particle volume and slurry concentration coefficient, the calculation method for the effective filling volume is as follows:

[0041] in, The filling rate; The effective filling volume per day; The total daily volume of filling slurry to be delivered; the hourly capacity of the filling system. This refers to the effective filling time per day. This represents the volume percentage of solid particles. It is the shrinkage coefficient after the filling slurry has solidified and shrunk.

[0042] Taking into account the influence of on-site constraints, temperature and humidity, filling height and slurry concentration on the settling phenomenon of the filling slurry, the settling coefficient after consolidation shrinkage of the filling slurry is modified. In specific implementation, as a preferred embodiment of the present invention, the settling coefficient after consolidation shrinkage of the filling slurry is modified according to the indoor foundation settling coefficient and on-site environmental factors of the stope.

[0043] Indoor tests were conducted to test filling grouts of different concentrations and cement-sand ratios. The height of the bleeding layer after single and multiple fillings with stabilization, as well as the height of the filling body after consolidation shrinkage, were measured in containers with standard molds. The indoor test results were used to correct the indoor foundation shrinkage coefficient. Indoor foundation shrinkage coefficient. Calculated based on the initial pouring height of the grout, the height of the bleed layer after stabilization, and the actual height of the filling material after bleed stabilization and curing:

[0044] in, Indicates the initial pouring height of the slurry. This indicates the height of the aquifer after the aquifer has stabilized. This indicates the actual height of the filling material after it has been stabilized and cured to prevent water seepage. After being transported to the stope, the filling slurry undergoes volume shrinkage due to gravity settling and hydration shrinkage, especially after water seepage. The effects of stope constraints, temperature and humidity, filling height, and slurry concentration on this shrinkage need to be comprehensively considered. Stope environmental factors include stope boundaries, temperature and humidity, filling height, and slurry concentration. The corrected shrinkage coefficient is expressed as:

[0045] in, Indicates the shrinkage coefficient. This represents the boundary constraint coefficient of the stope. The stronger the boundary constraint, the smaller the settlement. The boundary constraint coefficient of the stope with intact rock walls is 0.90-0.95, and the boundary constraint coefficient of the stope with loose surrounding rock or no constraint is 1.05-1.10. This represents the temperature and humidity correction factor. When the downhole temperature is greater than... When the temperature is high and the contraction is accelerated, the temperature and humidity correction factor is taken as 1.03-1.08. When the underground humidity is not less than 80%, the temperature and humidity correction factor is taken as 1.02-1.05 due to the accelerated contraction caused by drying. Under standard conditions, i.e., when the temperature is 20±2℃ and the humidity is not less than 90%, the temperature and humidity correction factor is taken as 1.0. This represents the filling height correction factor. The higher the filling height, the more significant the self-weight compression. When the filling height is less than 5m, the filling height correction factor is 1.0. When the filling height is in the range of 5-10m, the filling height correction factor is 1.02-1.05. When the filling height is greater than 10m, the filling height correction factor is 1.05-1.10. This represents the slurry concentration correction factor. The lower the slurry concentration, the greater the shrinkage. When the slurry mass concentration is not less than 75%, the slurry concentration correction factor is 1.0. When the slurry mass concentration is in the range of 70%-75%, the slurry concentration correction factor is 1.03-1.07. When the slurry mass concentration is less than 70%, the slurry concentration correction factor is 1.08-1.15.

[0046] A mining-filling balance model is constructed using the modified fragmentation and shrinkage coefficients. In a preferred embodiment of this invention, the mining-filling balance model considers the fragmentation between ore and rock in the mine stope after blasting to form a void, as well as the consolidation and shrinkage of the filling slurry after filling the void. Corresponding coefficients are then incorporated to modify the mining-filling balance formula.

[0047] The filling-fill balance means that the effective volume of the filling body is equal to the volume of the void formed.

[0048] The tailings yield threshold for achieving a balance between mining and charging is calculated based on the principle of material mass conservation. In a preferred embodiment of this invention, the fundamental relationships involved in the mineral processing are established based on the principle of material mass conservation. It is assumed that the total mass of the raw ore is the sum of the concentrate mass and the tailings mass. The concentrate yield is derived using the principle of useful component mass conservation: the mass of useful components in the raw ore = the mass of useful components in the concentrate + the mass of useful components in the tailings. The actual tailings yield of the mine is then calculated. Represented as:

[0049] in, Indicates the grade of the raw ore. Indicates the grade of the concentrate. Indicates the grade of tailings; Based on the principle of material conservation, when all tailings generated are used for backfilling of stope voids and there is no surplus, a zero-waste mining-backfill balance is achieved. By establishing an equation relating tailings yield as the dependent variable to mining-backfill balance, the actual tailings yield required for metal and non-metal mines to achieve mining-backfill balance is derived, and the tailings yield threshold for achieving mining-backfill balance is calculated.

[0050]

[0051] in, To achieve the tailings yield threshold at the point of production-supply balance, The density of the slurry; express The average ash-sand ratio of the tailings This indicates the types of tailings with different ash-to-sand ratios. For the first The ash-to-sand ratio of tailings; When filling with layered cementitious material, the first The weight corresponding to the tailings with different ash-sand ratios.

[0052] When the actual tailings yield is less than the calculated tailings yield, the tailings output will not meet the requirements for underground full tailings cemented backfilling. When the actual tailings yield is not less than the calculated tailings yield, the tailings output will meet the requirements for underground full tailings cemented backfilling.

[0053] For metallic and non-metallic mines employing cemented tailings backfilling, after achieving a mining-backfill balance, the tailings surplus is derived based on the law of conservation of materials, taking into account the specific mining and backfilling process characteristics of different mines. Calculation method:

[0054] This provides a basis for mining companies to consider ways to handle surplus tailings, ensuring safe, efficient and green development of mines.

[0055] Example This embodiment uses a domestic iron ore mine as an example. The mine adopts layered cemented backfilling with tailings, without considering waste rock backfilling. The mine's production capacity is 30 million tons per year, and its daily output is... Q p 90909t / d; deep-hole blasting is used in the mining area, with hole layout parameters of 3.0m×3.0m, explosive consumption of 0.43kg / t, and ore density... Average density of the filling material The filling grout had a cement-sand ratio of 1 / n (cement-sand ratios of 1:6, 1:10, and 1:20, with a weighted average of 1:14.12), and a moisture content of 28.013% (weighted value). Indoor tests showed that the filling employed a layered cemented filling material. K c The percentage is 10%; the filling rate is not less than 90%; the average tailings content W in each cubic meter of backfill is 1.254 t / m³. 3 Calculations show that the tailings yield threshold for achieving a balance between mining and replenishment in the mine is... The actual tailings yield was 44.23%. It is 65.29%. > If the mine meets the requirement of full tailings cementation and backfilling, there will be a surplus of tailings, which is 19,146 t / d.

[0056] The settling rate of the slurry is about 10%, so when the entire goaf is completely filled, 110% of the goaf volume of slurry needs to be filled.

[0057] 1) At 100% fullness

[0058] In the case of full-depth cross-section superelevation, a superelevation of 6m is required to completely fill the entire goaf.

[0059] 2) When the fill rate is 90%

[0060] To achieve a 90% filling rate in a full-depth cross-section with superelevation, the slurry must completely fill the goaf to achieve a 90% filling rate after settling. This study uses numerical simulation to simulate the mine at a 90% filling rate, considering the shrinkage and consolidation of the filling slurry in the goaf due to water seepage, which reduces the actual filling volume. Simulations were conducted before and after the shrinkage, and the specific results are as follows. Figure 2 .

[0061] Finally, it should be noted that the above embodiments are only used to illustrate the technical solutions of the present invention, and not to limit them; although the present invention has been described in detail with reference to the foregoing embodiments, those skilled in the art should understand that modifications can still be made to the technical solutions described in the foregoing embodiments, or equivalent substitutions can be made to some or all of the technical features; and these modifications or substitutions do not cause the essence of the corresponding technical solutions to deviate from the scope of the technical solutions of the embodiments of the present invention.

Claims

1. A method for determining the mining-filling balance considering ore and rock fragmentation and backfill slurry settling, characterized in that, include: The volume of the void formed after blasting is calculated based on the actual daily ore output of the mine and the coefficient of fragmentation. The fragmentation coefficient is corrected by utilizing the relationship between the fragmentation coefficient and rock quality indicators; Based on the principle of filling-out balance, and taking into account slurry concentration and solidification shrinkage factors, the effective filling volume is calculated. Taking into account the influence of on-site mining constraints, temperature and humidity, filling height and slurry concentration on the settling phenomenon of filling slurry, the settling coefficient after consolidation shrinkage of filling slurry is modified. A production-filling balance model was constructed using the modified fragmentation coefficient and subsidence coefficient. The tailings yield threshold for achieving the aforementioned mining-charging balance is calculated based on the principle of material mass conservation.

2. The method for determining the mining-filling balance considering ore and rock fragmentation and backfill slurry settling according to claim 1, characterized in that, The method for calculating the volume of the empty area is as follows: in, This represents the actual volume of the empty area formed in the mining area. This represents the total amount of ore mined in a single day. Let m be the ore output in the m-th single extraction; m is the number of extractions per day. Ore recovery rate; The volume of the goaf after blasting is affected by the ore fragmentation coefficient; This represents the density of the ore.

3. The method for determining the mining-filling balance considering ore and rock fragmentation and backfill slurry settling according to claim 1, characterized in that, The fragmentation coefficient is negatively correlated with the rock quality index RQD, and the negative correlation is fitted using an exponential function: Considering the explosive consumption and mesh density in the blasting parameters, the fragmentation coefficient is corrected as follows: in, This represents the coefficient of rupture before correction. This represents the corrected coefficient of thermal expansion. a, b, c The fitting parameters were obtained by using the ratio of the original volume of the ore and rock to the loose volume after blasting. q For the unit consumption of explosives, d The coefficient representing the effect of explosive consumption per unit; w For mesh density, This is the influence coefficient of the mesh density.

4. The method for determining the mining-filling balance quantity considering ore and rock fragmentation and backfill slurry settling according to claim 1, characterized in that, The effective filling volume is calculated as follows: in, The filling rate; The effective filling volume per day; The total daily volume of filling slurry to be delivered; the hourly capacity of the filling system. This refers to the effective filling time per day. This represents the volume percentage of solid particles. The shrinkage coefficient is the corrected shrinkage coefficient after consolidation shrinkage of the filling slurry.

5. The method for determining the mining-filling balance quantity considering ore and rock fragmentation and backfill slurry settling according to claim 1, characterized in that, The shrinkage coefficient of the filling grout after consolidation shrinkage is corrected based on the indoor foundation shrinkage coefficient and environmental factors at the mining site. Calculated based on the initial pouring height of the grout, the height of the bleed layer after stabilization, and the actual height of the filling material after bleed stabilization and curing: in, Indicates the initial pouring height of the slurry. This indicates the height of the aquifer after the aquifer has stabilized. This indicates the actual height of the filling material after it has been stabilized and cured to prevent water seepage. The environmental factors at the stope site include the stope boundary, temperature and humidity, filling height, and slurry concentration. The corrected shrinkage coefficient is expressed as: in, This represents the corrected shrinkage coefficient. This represents the boundary constraint coefficient of the mining area. This represents the temperature and humidity correction factor. This indicates the filling height correction factor. This represents the slurry concentration correction factor.

6. The method for determining the mining-filling balance quantity considering ore and rock fragmentation and backfill slurry settling according to claim 1, characterized in that, The resource extraction-filling balance model is as follows: The filling-fill balance means that the effective volume of the filling body is equal to the volume of the void formed.

7. The method for determining the mining-filling balance quantity considering ore and rock fragmentation and backfill slurry settling according to claim 1, characterized in that, Based on the aforementioned principle of material mass conservation, the fundamental relationships involved in the mineral processing technology are established, assuming that the total mass of the raw ore is the sum of the concentrate mass and the tailings mass: the concentrate yield is derived using the principle of conservation of useful component mass, and the actual tailings yield of the mine is calculated. Represented as: in, Indicates the grade of the raw ore. Indicates the grade of the concentrate. Indicates the grade of tailings; Based on the aforementioned material conservation principle, when all the tailings generated are used for backfilling the stope and there is no surplus, a zero-waste mining-backfilling balance is achieved. By establishing an equation relating tailings yield as the dependent variable when mining-backfilling balance is achieved, the tailings yield threshold for reaching mining-backfilling balance is calculated: in, To achieve the tailings yield threshold at the point of production-supply balance, The density of the slurry; express The average ash-sand ratio of the tailings This indicates the types of tailings with different ash-to-sand ratios. For the first The ash-to-sand ratio of tailings; When filling with layered cementitious material, the first The weight corresponding to the tailings with different ash-sand ratios.

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