Inclined draw shaft wall loss reduction control method, system, equipment and medium

Abstract

The invention discloses an inclined draw shaft wall loss reduction control method, system and equipment and a medium. The method comprises the following steps: constructing an initial normal velocity calculation formula when the ore rock is in impact contact with the well wall; constructing an inclined draw shaft wall impact response model; a calculation formula of evaluation indexes such as well wall deformation, ore rock impact force and impact kinetic energy under the impact effect is constructed; designing a multi-factor orthogonal scheme of the draw shaft inclination angle, the shaft diameter and the inclined chute inclination angle, and calculating the maximum values of the shaft wall deformation, the ore rock impact force and the impact kinetic energy under the influence of different factors; constructing a multiple regression model of the maximum well wall deformation, the maximum ore rock impact force and the maximum ore rock impact kinetic energy under the influence of multiple factors; and selecting an optimal combination scheme of the draw shaft inclination angle, the inclined chute inclination angle, the shaft diameter and the like. By controlling the inclination angle of the inclined draw shaft, the diameter of the shaft and the inclination angle of the inclined chute, the impact force and impact kinetic energy of ore rocks are reduced, the deformation of the shaft wall is reduced, and damage reduction control over the shaft wall of the inclined draw shaft under impact of the ore rocks is achieved.

Description

Technical Field

[0001] The invention belongs to the technical field of prevention and control of engineering geological disasters and resource exploitation in underground mines, and particularly relates to a method, a system, a device and a medium for controlling the loss reduction of the inclined ore pass shaft wall. Background Technique

[0002] An ore pass is an important roadway for downward transportation of ore and rock in the underground mining of metal ore deposits, and plays an important role in simplifying the mine hoisting and transportation system, improving production efficiency and reducing costs. According to the angle between the ore pass and the horizontal plane, the layout form of the ore pass is divided into two types: inclined layout and vertical layout. In actual engineering, restricted by deep ore bodies, dip angles of rock masses, etc., the inclined layout becomes the main layout form of the ore pass, and the safe operation of the inclined ore pass is related to the safe and efficient production of deep mines.

[0003] Due to the special engineering geological environment and complex use conditions, the problem of damage and failure of the inclined ore pass shaft wall is serious. For example, mines such as Tibet's Jiama copper polymetallic mine, Shandong's Xincheng gold mine, Hubei's Chengchao iron mine, South Africa's Kloof gold mine, and the Brunswick mine in northern Quebec, Canada, have been shut down for maintenance due to serious deformation and failure of the ore pass shaft wall. In some mines, the ore pass shaft wall is severely damaged, the surrounding rock is massively unstable and collapses, and the ore pass system is scrapped, causing huge economic losses to the mines. The main forms of damage to the inclined ore pass shaft wall include shaft wall deformation, depression, damage and instability collapse, etc., and the damage characteristics are manifested as the expansion of the shaft section, the damage of the shaft wall support structure, the rib spalling and collapse of the shaft wall surrounding rock, etc.

[0004] At present, scholars at home and abroad mainly conduct research on the damage and reduction control of the vertical ore pass wall. The research methods mainly include numerical simulation, laboratory tests, and 3D scanning. Esmaieli K et al. based on the discrete element method, used the particle flow program for numerical experiments, and simulated the impact damage area of the ore pass wall by the ore pass and finger-type inclined chute structures, and found that the intersection angle between the ore pass and the finger-type inclined chute is the key parameter affecting the degree and position of the impact damage of the ore pass wall (Esmaieli K, Hadjigeorgiou J. Influence of finger configuration on degradation of ore pass walls[C]. Proceedings of the 3rd CANUS rock mechanics symposium. 20|09); Liu Yanzhang et al. took the vertical ore pass of Jinshandian Mine as an example, constructed a similarity test platform for ore pass ore drawing based on the similarity theory, and discussed the range of the impact zone of the ore storage section of the ore pass wall based on the ellipsoid ore drawing theory (Liu Yanzhang, Zhang Bingtao, Ye Yicheng, etc. Similarity test study on ore migration and wall failure characteristics of main ore pass[J]. Journal of Mining & Safety Engineering, 2018, 35(03): 545-552.); Han Mengmeng et al. through 3D laser scanning technology, collected the original point cloud data of the collapsed area of the ore pass, constructed a 3D visualization model of the ore pass and its surrounding area, and obtained the collapsed volume of the ore pass wall and predicted the degree of impact damage of the ore pass wall through the horizontal section and three-dimensional section processing of the model (Han Mengmeng, Li Lijuan. Ore pass measurement and collapse analysis based on 3D laser scanning technology[J]. Geomatics Technology and Equipment, 2023, 25(01): 80-84); Li Binglei et al. according to the numerical simulation of ore pass reinforcement, through the comprehensive reinforcement technology of first shotcreting, then shotcrete with bolts, then shotcrete with concrete, and laying steel liner plates, studied the impact damage problem of the ore pass wall caused by ore drawing in deep high-stress rock strata (Li Binglei, Lin Guopeng, Li Yongbing. Numerical simulation and support of ore pass construction in high-stress fractured rock strata of Jinchuan[J]. Mining Technology, 2019, 19(06): 40-43); Niu Jinting et al. aiming at the problems such as the impact damage of the ore pass wall of an iron mine, blocked the original ore pass, and set up a measure ore pass near the ore unloading port in the middle section to change the ore migration path, thus effectively reducing the impact damage of the ore pass wall (Niu Jinting, Zhang Zhiqiang, Yin Zhanhui, etc. Improvement of ore drawing technology during the middle section conversion of a single main ore pass mine[J]. Modern Mining, 2015, 31(10): 27-29). There is little existing technology to study the influence of key factors on the impact response of the inclined ore pass wall from the perspective of theoretical mechanics, and it fails to study the reduction control of the inclined ore pass wall starting from the inclination angle of the inclined ore pass, the diameter of the shaft, and the inclination angle of the inclined chute, making it difficult to meet the actual engineering requirements. Summary of the Invention

[0005] To at least solve one of the problems existing in the prior art, the present invention provides a method, system, device and medium for controlling the damage reduction of the inclined ore pass wall. By constructing an impact response model of the inclined ore pass wall, calculating the evaluation indexes of the wall impact damage such as the wall deformation amount, the ore-rock impact force and the impact kinetic energy respectively, establishing a multiple regression model of the evaluation indexes under the influence of multiple factors, clarifying the priority levels of the control parameters such as the ore pass inclination angle, the shaft diameter and the inclined chute inclination angle, and selecting the optimal combination scheme of the control parameters, the problems of depression and damage of the ore pass wall are fundamentally solved, and the damage reduction control of the inclined ore pass wall under the ore-rock impact is realized.

[0006] To achieve the object of the present invention, a method for controlling the damage reduction of the inclined ore pass wall provided by the present invention includes the following steps:

[0007] Step 1: According to the structural characteristics of the inclined ore pass, derive the calculation formula of the initial normal velocity when the ore-rock impacts and contacts the wall.

[0008] Step 2: Based on the Hertz contact theory, construct an impact response model of the inclined ore pass wall.

[0009] Step 3: According to the impact response model of the inclined ore pass wall, respectively derive the calculation formulas of the evaluation indexes of the wall impact damage such as the wall deformation amount, the ore-rock impact force and the impact kinetic energy under the impact action.

[0010] Step 4: Design a multi-factor orthogonal scheme for the ore pass inclination angle, the shaft diameter and the inclined chute inclination angle, and respectively calculate the maximum values of the wall deformation amount, the ore-rock impact force and the impact kinetic energy under the influence of different factors.

[0011] Step 5: Based on the least square method principle, respectively construct multiple regression models of the maximum wall deformation amount, the maximum ore-rock impact force and the maximum ore-rock impact kinetic energy under the influence of multiple factors. Starting from the perspective of wall damage reduction, clarify the priority levels of the control parameters such as the ore pass inclination angle, the shaft diameter and the inclined chute inclination angle.

[0012] Step 6: Taking the minimum wall deformation amount, the minimum ore-rock impact force and the minimum ore-rock impact kinetic energy as the principles, select the optimal combination scheme of the control parameters such as the ore pass inclination angle, the inclined chute inclination angle and the shaft diameter, and realize the damage reduction control of the inclined ore pass wall under the ore-rock impact.

[0013] Preferably, step 1 specifically includes:

[0014] Step 1.1: According to the structural characteristics of the inclined ore pass, it can be known from the kinetic energy theorem that the velocity calculation formula of the ore-rock leaving the inclined chute and entering the shaft section is as shown in formula (1):

[0015]

[0016] Wherein, v is the velocity of the ore and rock leaving the inclined chute and entering the shaft section; g is the acceleration due to gravity; μ is the friction coefficient; H1 and H2 are the heights of the ore discharge opening and the inclined chute respectively; α is the inclination angle of the inclined chute;

[0017] Step 1.2: Based on the kinematic principle and combined with the structural characteristics of the inclined shaft, the calculation formula for the initial velocity when the ore and rock impact and contact with the shaft wall is derived, as shown in formula (2):

[0018]

[0019] Wherein, θ is the inclination angle of the shaft; D is the diameter of the shaft.

[0020] Preferably, in step 2, since the process of the ore and rock impacting the inclined shaft wall is a complex dynamic process, from the moment of contact between the two to the moment when the deformation of the shaft wall reaches the maximum, the stress of the shaft wall rock mass gradually extends from the impact point to the surrounding area, causing a mechanical response of the entire shaft wall. Therefore, based on the contact mechanics theory, on the basis of the Hertz contact model, a damping is introduced to represent the energy loss during the process of the ore and rock impacting the shaft wall, thereby constructing an impact response model for the inclined shaft wall.

[0021] Preferably, step 3 specifically includes:

[0022] Step 3.1: According to the equivalent Kelvin impact model, the relationship between the impact force of the ore and rock and the deformation amount and deformation rate of the shaft wall is as shown in formula (3):

[0023]

[0024] Wherein, F(t) is the impact force function of the ore and rock on the shaft wall; δ(t), are the functions of the deformation amount and deformation rate of the shaft wall respectively; t is the time of the shaft wall deformation; k * is the equivalent contact stiffness; c is the damping coefficient;

[0025] Step 3.2: According to Newton's second law of motion, the relationship between the impact force of the ore and rock and the deformation acceleration of the shaft wall is as shown in formula (4):

[0026]

[0027] Wherein, is the deformation acceleration function of the shaft wall; m is the mass of the ore and rock, m = (4 / 3)πρR 3 ; R and ρ are the radius and density of the ore and rock respectively; P is the block size of the ore and rock, P = 2R;

[0028] Step 3.3: According to the relationship between the impact force of the ore and rock and the deformation amount and deformation acceleration of the shaft wall, combined with the initial conditions δ(t = 0) = 0, The wellbore deformation function is obtained by solving, as shown in formula (5):

[0029]

[0030] In the formula, v' is the velocity of the ore-rock when it just contacts the wellbore, that is, when t = 0; ω and ψ are coefficients, ω = (4k * m - c 2 ) 1 / 2 / (2m), ψ = c / (2m);

[0031] The first derivative and the second derivative of the wellbore deformation function δ(t) are respectively taken to obtain the functions of the wellbore deformation rate and the wellbore deformation acceleration, as shown in formulas (6) and (7):

[0032]

[0033] Step 3.4: According to the definitions of the impact force and the impact kinetic energy, the functions of the ore-rock impact force and the impact kinetic energy are obtained by solving, as shown in formulas (8) and (9):

[0034]

[0035] Step 3.5: The maximum values of the wellbore deformation, the ore-rock impact force, and the impact kinetic energy are respectively taken as the evaluation indexes for the impact damage of the inclined chute wellbore. The maximum values of the three are as shown in formulas (10), (11), and (12):

[0036] δ m = max[δ(t)](10);

[0037] F m = max[F(t)](11);

[0038] E k,m = max[E k (t)](12);

[0039] In the formula, δ m , F m , E k,m are the maximum wellbore deformation, the maximum ore-rock impact force, and the maximum ore-rock impact kinetic energy respectively.

[0040] Preferably, in step 3.1, the calculation methods of the wellbore rock pressure depth δ q and the maximum elastic deformation energy U m of the wellbore at the initial yield of the wellbore are as follows:

[0041] Step 3.1.1: Based on the equivalent Kelvin impact model and combined with the Hertz contact theory, the calculation formula of the equivalent contact stiffness k * [[ID=6�]]is as shown in formula (13):

[0042]

[0043] Wherein, k h is the Hertz contact stiffness, and its calculation formula is shown in formula (14):

[0044]

[0045] Wherein, E * is the equivalent elastic modulus, and its calculation formula is shown in formula (15):

[0046]

[0047] Wherein, E1, u1, E2, and u2 are the elastic moduli and Poisson's ratios of the ore-rock and the shaft wall respectively;

[0048] Step 3.1.2: According to the linear elastic contact theory, the calculation formula of the damping coefficient is shown in formula (16):

[0049]

[0050] Wherein, ξ is the modal damping ratio, and its calculation formula is shown in formula (17):

[0051]

[0052] Wherein, e is the coefficient of restitution. According to the theory of inelastic impact, the calculation formula of the coefficient of restitution is shown in formula (18):

[0053]

[0054] Wherein: σ d is the average contact stress between the ore-rock and the shaft wall during the impact process. Generally, take σ d = 3σ q , σ q is the yield strength of the shaft wall.

[0055] Preferably, step 5 specifically includes:

[0056] Step 5.1: Normalize the data such as the maximum shaft wall deformation, the maximum ore-rock impact force, and the maximum impact kinetic energy calculated in step 4, as well as the control parameters such as the raise inclination angle, the inclined chute inclination angle, and the shaft diameter, to eliminate the influence of the measurement unit on the data analysis, as shown in formula (19):

[0057]

[0058] Wherein: A i is any value in a certain type of data (for example, control parameters such as the raise inclination angle or control indicators such as the maximum shaft wall deformation); i is the serial number of the sample; is the average value of a certain type of data, N is the number of samples; A i ' is A i a dimensionless number after normalization.

[0059] Step 5.2: According to the data after normalization, establish multiple regression models for the maximum shaft wall deformation, maximum ore-rock impact force, and maximum ore-rock impact kinetic energy under the influence of three factors: raise inclination angle, shaft diameter, and inclined chute inclination angle, as shown in formulas (20), (21), and (22):

[0060]

[0061]

[0062] In the formula, and are the estimated values of the maximum shaft wall deformation, maximum ore-rock impact force, and maximum ore-rock impact kinetic energy, respectively, as well as the estimated values of the raise inclination angle, shaft diameter, and inclined chute inclination angle; and are the average values of the maximum shaft wall deformation, maximum ore-rock impact force, and maximum ore-rock impact kinetic energy, respectively, as well as the average values of the raise inclination angle, shaft diameter, and inclined chute inclination angle; λ δ,θ 、λ δ,D 、λ δ,α are the significance coefficients of the raise inclination angle, shaft diameter, and inclined chute inclination angle on the maximum shaft wall deformation, respectively; λ F,θ 、λ F,D 、λ F,α are the significance coefficients of the raise inclination angle, shaft diameter, and inclined chute inclination angle on the maximum ore-rock impact force, respectively; are the significance coefficients of the raise inclination angle, shaft diameter, and inclined chute inclination angle on the maximum ore-rock impact kinetic energy, respectively; λ δ 、λ F 、 are all constants.

[0063] Step 5.3: Based on the multiple regression models of the maximum shaft wall deformation, maximum ore-rock impact force, and maximum impact kinetic energy under multi-factor influence, analyze the significance of the raise inclination angle, shaft diameter, and inclined chute inclination angle on the maximum shaft wall deformation, maximum ore-rock impact force, and maximum ore-rock impact kinetic energy. Starting from the perspective of shaft wall loss reduction, clarify the priority of control parameters such as the raise inclination angle, inclined chute inclination angle, and shaft diameter.

[0064] Preferably, in step 6, based on the multi-factor orthogonal scheme and the maximum values of the shaft wall deformation, ore-rock impact force, and impact kinetic energy under the influence of different factors obtained through calculation, the values of the maximum shaft wall deformation, maximum ore-rock impact force, and maximum ore-rock impact kinetic energy are sorted in ascending order respectively. Then, the orthogonal schemes with the values of the three evaluation indexes located at the preset values are selected respectively as the optimal combination scheme of the shaft wall damage reduction control parameters, so as to realize the damage reduction control of the inclined ore pass shaft wall under ore-rock impact.

[0065] An inclined ore pass shaft wall damage reduction control system provided by an embodiment of the present invention includes the following modules:

[0066] An ore-rock initial impact velocity determination module, according to the structural characteristics of the inclined ore pass, derives the calculation formula for the initial normal velocity when the ore-rock impacts and contacts the shaft wall;

[0067] An inclined ore pass shaft wall impact response model construction module, based on the Hertz contact theory, constructs an inclined ore pass shaft wall impact response model;

[0068] A shaft wall impact damage assessment index determination module, according to the inclined ore pass shaft wall impact response model, respectively derives the calculation formulas for the shaft wall impact damage assessment indexes such as the shaft wall deformation, ore-rock impact force, and impact kinetic energy under the impact action;

[0069] A multi-factor orthogonal scheme determination module, designs a multi-factor orthogonal scheme for the ore pass inclination angle, shaft diameter, and inclined chute inclination angle, and respectively calculates the maximum values of the shaft wall deformation, ore-rock impact force, and impact kinetic energy under the influence of different factors;

[0070] A shaft wall damage reduction control parameter priority determination module, based on the least squares principle, respectively constructs multiple regression models for the maximum shaft wall deformation, maximum ore-rock impact force, and maximum ore-rock impact kinetic energy under the influence of multiple factors, and starting from the perspective of shaft wall damage reduction, clarifies the priorities of the control parameters such as the ore pass inclination angle, shaft diameter, and inclined chute inclination angle;

[0071] A shaft wall damage reduction control parameter optimal combination scheme determination module, with the principles of minimum shaft wall deformation, minimum ore-rock impact force, and minimum ore-rock impact kinetic energy, selects the optimal combination scheme of the control parameters such as the ore pass inclination angle, inclined chute inclination angle, and shaft diameter, so as to realize the damage reduction control of the inclined ore pass shaft wall under ore-rock impact.

[0072] A computer device provided by an embodiment of the present invention includes a processor and a memory. The memory is used to store instructions or computer programs, and the processor is used to execute the instructions or computer programs in the memory so that the device executes the steps of any one of the methods.

[0073] A computer-readable storage medium provided by an embodiment of the present invention stores instructions, and when the instructions run on a device, the device is caused to execute the steps of any one of the above methods.

[0074] Compared with the prior art, the beneficial effects of the present invention are as follows:

[0075] 1. The present invention can control control parameters such as the inclination angle of the inclined chute, the shaft diameter, and the inclination angle of the inclined chute to reduce the impact force and impact kinetic energy of the ore and rock, reduce the deformation amount of the shaft wall, and achieve the reduction of the inclined chute shaft wall under the impact of the ore and rock.

[0076] 2. The present invention constructs a multiple regression model of the maximum shaft wall deformation amount, the maximum ore and rock impact force, and the maximum ore and rock impact kinetic energy, clarifies the priority of the shaft wall reduction control parameters, and provides a theoretical reference for the formulation of inclined chute shaft wall reduction measures.

[0077] 3. The present invention proposes an optimal combination scheme of shaft wall reduction control parameters, which can fundamentally prevent the accidents of inclined chute shaft wall depression and collapse failure, ensure the long-term safe and stable operation of the chute system, and is beneficial to the safe production of the mine. Description of the Drawings

[0078] Figure 1 It is a flow chart of a method for controlling the reduction of an inclined chute shaft wall in an embodiment of the present invention.

[0079] Figure 2 It is a schematic structural diagram of a system for controlling the reduction of an inclined chute shaft wall in an embodiment of the present invention.

[0080] Figure 3 It is a schematic diagram of the basic structure of an inclined chute.

[0081] Figure 4 It is a diagram of an impact response model of an inclined chute shaft wall in an embodiment of the present invention. Detailed Embodiments

[0082] To make the above objects, technical solutions, and advantages of the present invention clearer, the technical solutions in the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings of the specification. Obviously, the described embodiments are some, but not all, of the embodiments of the present invention. All other embodiments obtained by those of ordinary skill in the art based on the embodiments of the present invention without creative efforts are within the scope of the present invention.

[0083] Please refer to Figure 1 , a method for controlling the reduction of an inclined chute shaft wall provided by the present invention includes the following steps:

[0084] Step 1: According to the structural characteristics of the inclined chute, construct the calculation formula for the initial normal velocity when the ore-rock impacts and contacts the shaft wall.

[0085] Please refer to Figure 3 , according to the basic structure of the inclined chute, the mined ore-rock enters the chute from the ore-discharging opening, slides through the inclined chute and the shaft section, and is temporarily stored in the bottom ore bin. Due to the structural characteristics of the inclined chute itself, the ore-rock collides with the shaft wall during the natural unloading process to the ore bin, which easily leads to problems such as shaft wall depression, collapse, and loss. Among them, the shaft wall in the intersection area of the inclined chute and the shaft is most severely impacted. In the figure, θ is the inclination angle of the chute; α is the inclination angle of the inclined chute; D is the diameter of the shaft; H1 and H2 are the heights of the ore-discharging opening and the inclined chute respectively.

[0086] This step includes the following sub-steps:

[0087] Step 1.1: According to the structural characteristics of the inclined chute, from the kinetic energy theorem, the calculation formula for the velocity of the ore-rock leaving the inclined chute and entering the shaft section is as shown in formula (1):

[0088]

[0089] In the formula, v is the velocity of the ore-rock leaving the inclined chute and entering the shaft section; g is the acceleration due to gravity; μ is the friction coefficient; H1 and H2 are the heights of the ore-discharging opening and the inclined chute respectively; α is the inclination angle of the inclined chute.

[0090] Step 1.2: Based on the kinematic principle and combined with the structural characteristics of the inclined chute, derive the calculation formula for the initial velocity when the ore-rock impacts and contacts the shaft wall, as shown in formula (2):

[0091]

[0092] In the formula, v' is the initial velocity when the ore-rock impacts and contacts the shaft wall; θ is the inclination angle of the chute; D is the diameter of the shaft.

[0093] Step 2: Based on the Hertz contact theory, construct the impact response model of the inclined chute shaft wall.

[0094] Please refer to Figure 4 , since the process of the ore-rock impacting the inclined chute shaft wall is a complex dynamic process, from the start of the contact between the two to the moment when the shaft wall deformation reaches the maximum, the stress of the shaft wall rock mass gradually spreads from the impact point to the surrounding area, resulting in a mechanical response of the entire shaft wall. Therefore, based on the linear elastic contact mechanics theory and the Hertz contact theory, considering the equivalent contact stiffness k * describing the ability of the shaft wall to resist deformation, introduce the damping c to represent the energy loss during the process of the ore-rock impacting the shaft wall, and thus construct the impact response model of the inclined chute shaft wall under the impact of the ore-rock.

[0095] Step 3: According to the impact response model of the inclined ore pass wall, calculate the formulas for the evaluation indexes of the wall impact damage, such as the wall deformation, the ore-rock impact force, and the impact kinetic energy under the impact action respectively.

[0096] This step includes the following sub-steps:

[0097] Step 3.1: According to the equivalent Kelvin impact model, the relationship between the ore-rock impact force and the wall deformation and deformation rate is shown in Formula (3):

[0098]

[0099] In the formula, F(t) is the impact force function of the ore-rock on the wall; δ(t), are the functions of the wall deformation and deformation rate respectively; t is the time of the wall deformation; k * is the equivalent contact stiffness; c is the damping coefficient.

[0100] Step 3.1.1: The calculation methods of the equivalent contact stiffness k * and the damping coefficient c are as follows:

[0101] Based on the equivalent Kelvin impact model and combined with the Hertz contact theory, the calculation formula of the equivalent contact stiffness k * is shown in Formula (4):

[0102]

[0103] In the formula, m is the mass of the ore-rock, m = (4 / 3)πρR 3 ; R and ρ are the radius and density of the ore-rock respectively; P is the ore-rock lump size, P = 2R; k h is the Hertz contact stiffness, and its calculation formula is shown in Formula (5):

[0104]

[0105] In the formula, E * is the equivalent elastic modulus, and its calculation formula is shown in Formula (6):

[0106]

[0107] In the formula, E1 and u1 are the elastic modulus and Poisson's ratio of the ore-rock respectively; E2 and u2 are the elastic modulus and Poisson's ratio of the wall.

[0108] Step 3.1.2: According to the linear elastic contact theory, the calculation formula of the damping coefficient is shown in Formula (7):

[0109]

[0110] In the formula, ξ is the modal damping ratio, and its calculation formula is shown in formula (8):

[0111]

[0112] In the formula, e is the coefficient of restitution. According to the theory of inelastic impact, the calculation formula of the coefficient of restitution is shown in formula (9):

[0113]

[0114] In the formula: σ d is the average contact stress between the ore-rock and the shaft wall during the impact process. In some embodiments of the present invention, take σ d = 3σ q , σ q is the yield strength of the shaft wall;

[0115] Step 3.2: According to Newton's second law of motion, the relationship between the ore-rock impact force and the shaft wall deformation acceleration is shown in formula (10):

[0116]

[0117] In the formula, is the shaft wall deformation acceleration function;

[0118] Step 3.3: According to the relationship between the ore-rock impact force and the shaft wall deformation amount and the shaft wall deformation acceleration, combined with the initial conditions δ(t = 0) = 0, Solve to obtain the shaft wall deformation amount function, as shown in formula (11):

[0119]

[0120] In the formula, v' is the velocity of the ore-rock when it just contacts the shaft wall, that is, at t = 0; ω, ψ are coefficients, ω = (4k * m - c 2 ) 1 / 2 / (2m), ψ = c / (2m);

[0121] Take the first derivative and the second derivative of the shaft wall deformation amount function δ(t) respectively to obtain the functions of the shaft wall deformation rate and the shaft wall deformation acceleration, as shown in formulas (12) and (13):

[0122]

[0123] Step 3.4: According to the definitions of the impact force and the impact kinetic energy, solve to obtain the functions of the ore-rock impact force and the impact kinetic energy, as shown in formulas (14) and (15):

[0124]

[0125] Step 3.5: Respectively take the maximum values of the shaft wall deformation, the ore-rock impact force, and the impact kinetic energy as the evaluation indexes for the impact damage of the inclined ore pass shaft wall. The maximum values of the three are shown in formulas (16), (17), and (18):

[0126] δ m = max[δ(t)] (16);

[0127] F m = max[F(t)] (17);

[0128] E k,m = max[E k (t)] (18);

[0129] In the formula, δ m , F m , are the maximum shaft wall deformation, the maximum ore-rock impact force, and the maximum ore-rock impact kinetic energy respectively.

[0130] Step 4: Design a multi-factor orthogonal scheme for the ore pass inclination angle, the shaft diameter, and the inclined chute inclination angle, and calculate the maximum values of the shaft wall deformation, the ore-rock impact force, and the impact kinetic energy under the influence of different factors respectively.

[0131] In some embodiments of the present invention, in combination with the actual engineering situation, M different ore pass inclination angles, M different shaft diameters, and M different inclined chute inclination angles are respectively selected (it can be understood that, for the convenience of subsequent operations here, the numbers of the ore pass inclination angle, the shaft diameter, and the inclined chute inclination angle are equal. In other embodiments, the numbers of the ore pass inclination angle, the shaft diameter, and the inclined chute inclination angle may not be equal), and orthogonal tests under the influence of multiple control parameters are carried out. Through the calculation formulas of the shaft wall impact damage evaluation indexes such as the maximum shaft wall deformation, the maximum ore-rock impact force, and the maximum ore-rock impact kinetic energy, M 3 groups of orthogonal schemes are calculated.

[0132] Step 5: Based on the least squares principle, respectively construct multiple regression models for the maximum shaft wall deformation, the maximum ore-rock impact force, and the maximum ore-rock impact kinetic energy under the influence of multiple factors, and starting from the perspective of shaft wall damage reduction, clarify the priority levels of control parameters such as the ore pass inclination angle, the shaft diameter, and the inclined chute inclination angle.

[0133] This step includes the following sub-steps:

[0134] Step 5.1: Normalize the data such as the maximum shaft wall deformation, the maximum ore-rock impact force, and the maximum impact kinetic energy calculated in Step 4, as well as the control parameters such as the ore pass inclination angle, the inclined chute inclination angle, and the shaft diameter, to eliminate the influence of the measurement unit on data analysis, as shown in formula (19):

[0135]

[0136] In the formula: A i is any value in a certain type of data (for example, control parameters such as the inclination angle of the ore pass or control indicators such as the maximum shaft wall deformation); i is the serial number of the sample; is the average value of a certain type of data, N is the number of samples; A i ' is the dimensionless number after the normalization processing of A i Step 5.2: According to the data after normalization processing, respectively construct multiple regression models of the maximum shaft wall deformation, the maximum ore-rock impact force, and the maximum ore-rock impact kinetic energy under the influence of three factors: the inclination angle of the ore pass, the shaft diameter, and the inclination angle of the inclined chute, as shown in formulas (20), (21), and (22):

[0137]

[0138]

[0139] In the formula, are the estimated values of the maximum shaft wall deformation, the maximum ore-rock impact force, and the maximum ore-rock impact kinetic energy respectively, are the estimated values of the inclination angle of the ore pass, the shaft diameter, and the inclination angle of the inclined chute respectively; are the average values of the maximum shaft wall deformation, the maximum ore-rock impact force, and the maximum ore-rock impact kinetic energy respectively, and θ, D, and α are the average values of the inclination angle of the ore pass, the shaft diameter, and the inclination angle of the inclined chute respectively; λ δ,θ δ,D δ,α F,θ F,D F,α δ F

[0140] are the significance coefficients of the inclination angle of the ore pass, the shaft diameter, and the inclination angle of the inclined chute on the maximum shaft wall deformation respectively; are the significance coefficients of the inclination angle of the ore pass, the shaft diameter, and the inclination angle of the inclined chute on the maximum ore-rock impact force respectively; are the significance coefficients of the inclination angle of the ore pass, the shaft diameter, and the inclination angle of the inclined chute on the maximum ore-rock impact kinetic energy respectively; λ δ F

[0140] are all constants.

[0141] Step 5.3: Based on the multiple regression models of the maximum shaft wall deformation, the maximum ore-rock impact force, and the maximum ore-rock impact kinetic energy under the influence of multiple factors, analyze the significance of the inclination angle of the ore pass, the shaft diameter, and the inclination angle of the inclined chute on the maximum shaft wall deformation, the maximum ore-rock impact force, and the maximum ore-rock impact kinetic energy. Starting from the perspective of shaft wall damage reduction, clarify the priority of control parameters such as the inclination angle of the ore pass, the inclination angle of the inclined chute, and the shaft diameter.

[0141] Step 6: Taking the minimum deformation of the shaft wall, the minimum impact force of the ore and rock, and the minimum impact kinetic energy of the ore and rock as the principles, select the optimal combination of control parameters such as the inclination angle of the ore pass, the inclination angle of the inclined chute, and the diameter of the shaft to achieve the damage reduction control of the inclined ore pass shaft wall under the impact of the ore and rock.

[0142] Specifically, after conducting multiple groups of orthogonal tests on the orthogonal scheme designed in Step 4, sort the values of the maximum shaft wall deformation, the maximum impact force of the ore and rock, and the maximum impact kinetic energy of the ore and rock in ascending order respectively, and select the orthogonal schemes in which the values of the three evaluation indexes are within reasonable quantiles as the optimal combination of the shaft wall damage reduction control parameters to achieve the damage reduction control of the inclined ore pass shaft wall under the impact of the ore and rock.

[0143] Please refer to Figure 2 , in some embodiments of the present invention, a control system for reducing the damage of the inclined ore pass shaft wall is further provided, which includes the following modules:

[0144] An initial impact velocity determination module for the ore and rock, which is used to derive the calculation formula for the initial normal velocity when the ore and rock come into impact contact with the shaft wall according to the structural characteristics of the inclined ore pass;

[0145] An impact response model construction module for the inclined ore pass shaft wall, which is used to construct an impact response model for the inclined ore pass shaft wall based on the Hertz contact theory;

[0146] An evaluation index determination module for the shaft wall impact damage, which is used to derive the calculation formulas for the shaft wall impact damage evaluation indexes such as the shaft wall deformation, the impact force of the ore and rock, and the impact kinetic energy under the impact according to the impact response model of the inclined ore pass shaft wall;

[0147] A multi-factor orthogonal scheme determination module, which is used to design a multi-factor orthogonal scheme for the inclination angle of the ore pass, the diameter of the shaft, and the inclination angle of the inclined chute, and calculate the maximum values of the shaft wall deformation, the impact force of the ore and rock, and the impact kinetic energy under the influence of different factors respectively;

[0148] A priority determination module for the shaft wall damage reduction control parameters, which is used to construct multiple regression models for the maximum shaft wall deformation, the maximum impact force of the ore and rock, and the maximum impact kinetic energy under the influence of multiple factors based on the least squares principle, and clarify the priorities of the control parameters such as the inclination angle of the ore pass, the diameter of the shaft, and the inclination angle of the inclined chute from the perspective of shaft wall damage reduction;

[0149] An optimal combination scheme determination module for the shaft wall damage reduction control parameters, which is used to select the optimal combination of control parameters such as the inclination angle of the ore pass, the inclination angle of the inclined chute, and the diameter of the shaft based on the principles of the minimum shaft wall deformation, the minimum impact force of the ore and rock, and the minimum impact kinetic energy of the ore and rock, so as to achieve the damage reduction control of the inclined ore pass shaft wall under the impact of the ore and rock.

[0150] In some embodiments of the present invention, a computer device is also provided, which is applicable to a method for controlling damage reduction of the wall of an inclined chute, and includes a processor and a memory, wherein the memory is used to store instructions or computer programs, and the processor is used to execute the instructions or computer programs in the memory so that the device performs the steps of the method described in the aforementioned embodiment.

[0151] In some embodiments of the present invention, a computer-readable storage medium is further provided, wherein instructions are stored in the computer-readable storage medium. When the instructions are executed on a device, the device executes the steps of the method described in the aforementioned embodiment.

[0152] In some embodiments of the present invention, a specific example is used to verify the effectiveness of the present invention.

[0153] A mine chute system was selected as the engineering target. The inclined chute is primarily located in the Baizuo Formation. The ore mined from the mine is primarily primary lead-zinc sulfide ore. The physical and mechanical parameters of the ore blocks discharged from the chute and the rock mass of the shaft walls are shown in Table 1. The mine's inclined chute has an inclination angle θ of 50°-90°, a shaft diameter D of 1-5m, an inclined chute angle α of 50°-90°, and the vertical section height H1 and inclined chute height H2 of 2.0m and 8.0m, respectively. The ore block size P of the discharged ore is set to 400mm.

[0154] Table 1 Physical and mechanical parameters of ore and rock

[0155]

[0156] The chute inclination angles θ of 50°, 60°, 70°, 80°, and 89°, the shaft diameters D of 1 m, 2 m, 3 m, 4 m, and 5 m, and the inclined chute inclination angles α of 50°, 60°, 70°, 80°, and 89° were selected, respectively. A multi-factor orthogonal scheme for the chute inclination angle, shaft diameter, and inclined chute inclination angle was designed. According to the calculation formulas for the shaft wall deformation, rock impact force, and impact kinetic energy, which are the evaluation indicators of shaft wall impact damage, the maximum shaft wall deformation, rock impact force, and kinetic energy of rock impact were calculated. The results are shown in Table 2.

[0157] Table 2 Orthogonal design

[0158]

[0159]

[0160]

[0161]

[0162] Based on the basic principle of the least squares method, according to the data in Table 2, multiple regression models of the maximum shaft wall deformation, the maximum ore-rock impact force, and the maximum ore-rock impact kinetic energy under the influence of multiple control parameters such as the inclined shaft angle, the shaft diameter, and the inclined chute angle are established respectively, and the significance of different control parameters of the inclined shaft is obtained, so as to clarify the priority of control parameters such as the inclined shaft angle, the shaft diameter, and the inclined chute angle.

[0163] By normalizing the data in Table 2, multiple regression models of the maximum shaft wall deformation, the maximum ore-rock impact force, and the maximum ore-rock impact kinetic energy under the influence of multiple control parameters such as the inclined shaft angle, the shaft diameter, and the inclined chute angle are constructed, as shown in formulas (23), (24), and (25):

[0164]

[0165] According to the multiple regression model of the shaft wall deformation, |λ δ,θ | = 1.135, |λ δ,D | = 0.004, |λ δ,α | = 0.942; according to the multiple regression model of the maximum ore-rock impact force, |λ F,θ | = 1.670, |λ F,D | = 0.007, |λ F,α | = 1.304; according to the multiple regression model of the maximum ore-rock impact kinetic energy, Therefore, the significance of each control parameter for reducing the damage of the inclined shaft wall to the evaluation indexes of shaft wall impact damage such as the maximum shaft wall deformation, the maximum ore-rock impact force, and the maximum ore-rock impact kinetic energy is θ > α > D. The inclined shaft angle has the greatest impact on the shaft wall damage, followed by the inclined chute angle, and the shaft diameter has the smallest impact. The control priority of the control parameters for reducing the damage of the inclined shaft wall from high to low is the inclined shaft angle, the inclined chute angle, and the shaft diameter.

[0166] For the orthogonal scheme in Table 2, sorting is carried out in ascending order according to the values of the maximum shaft wall deformation, the maximum ore-rock impact force, and the maximum ore-rock impact kinetic energy respectively. It is found that the schemes within the 12% quantile of the values of the three shaft wall impact damage evaluation indexes are the same. Among these schemes, there is no significant difference in the influence mechanism of the control parameters for reducing shaft wall damage on the shaft wall impact damage evaluation indexes, and they follow the principle of "the minimum shaft wall deformation, the minimum ore-rock impact force, and the minimum ore-rock impact kinetic energy". Therefore, the 12% quantile is selected as the reasonable quantile, and the maximum shaft wall deformation value (1.66 mm), the maximum ore-rock impact force value (0.44 kN), and the maximum ore-rock impact kinetic energy value (0.56 MJ) at the 12% quantile are obtained. As shown in Table 3 is the optimal combination scheme of the control parameters for reducing the damage of the inclined shaft wall. This scheme is sorted according to the principle of "the minimum shaft wall deformation", and the scheme selection also follows the principles of "the minimum ore-rock impact force" and "the minimum ore-rock impact kinetic energy".

[0167] Table 3 Optimal combination scheme of control parameters for reduction of inclined ore pass shaft wall damage

[0168]

[0169] From the optimal combination scheme of the control parameters for the reduction of the inclined ore pass shaft wall damage in Table 3, it can be seen that when both the ore pass inclination angle and the inclined chute inclination angle are close to 90°, the values of the shaft wall impact damage evaluation indexes such as the maximum shaft wall deformation, the maximum ore-rock impact force, and the maximum ore-rock impact kinetic energy all decrease significantly. In addition, the smaller the shaft diameter, the smaller the values of each evaluation index. Therefore, considering that the diameter of the raise boring machine is usually 2 - 4 m in actual engineering, the preferred shaft diameter is 2 m, and the preferred ore pass inclination angle and inclined chute inclination angle should both be close to 90°.

[0170] The present invention constructs an impact response model of the inclined ore pass shaft wall, calculates the shaft wall impact damage evaluation indexes such as the shaft wall deformation, the ore-rock impact force, and the impact kinetic energy respectively, establishes a multiple regression model of the evaluation indexes under the influence of multiple factors, clarifies the priority of the control parameters such as the ore pass inclination angle, the shaft diameter, and the inclined chute inclination angle, selects the optimal combination scheme of the control parameters, reduces the ore-rock impact force and the impact kinetic energy, reduces the shaft wall deformation, realizes the reduction control of the inclined ore pass shaft wall under the ore-rock impact, fundamentally prevents the accidents of inclined ore pass shaft wall depression and collapse damage, ensures the long-term safe and stable operation of the ore pass system, and is beneficial to the safe production of the mine.

[0171] For the step numbers in the above embodiments, they are only set for the convenience of elaboration and explanation, and no limitation is imposed on the order between the steps. The execution order of each step in the embodiments can be adaptively adjusted according to the understanding of those skilled in the art.

[0172] The above embodiments are an implementation manner of the present invention, but the implementation manner of the present invention is not limited by the above embodiments. Any other changes, modifications, substitutions, combinations, and simplifications made without departing from the basic principles and ideas of the present invention are equivalent replacement methods and are all included in the protection scope of the present invention.

Claims

1. A method for controlling the loss of the inclined ore pass wall, characterized in that It includes the following steps: According to the structural characteristics of the inclined ore pass, establish the calculation formula for the initial normal velocity when the ore-rock impacts and contacts the shaft wall; Based on the Hertz contact theory, establish the impact response model of the inclined ore pass shaft wall; According to the impact response model of the inclined ore pass shaft wall, respectively establish the calculation formulas for the evaluation indexes of shaft wall deformation, ore-rock impact force, and impact kinetic energy under impact for the shaft wall impact damage; Design a multi-factor orthogonal scheme for the ore pass inclination angle, shaft diameter, and inclined chute inclination angle, and respectively calculate the maximum values of shaft wall deformation, ore-rock impact force, and impact kinetic energy under the influence of different factors; Based on the least squares principle, respectively establish multiple regression models for the maximum shaft wall deformation, maximum ore-rock impact force, and maximum ore-rock impact kinetic energy under the influence of multiple factors, and clarify the priority order of the ore pass inclination angle, shaft diameter, and inclined chute inclination angle from the perspective of shaft wall damage reduction; Taking the minimum shaft wall deformation, minimum ore-rock impact force, and minimum ore-rock impact kinetic energy as the principles, select the optimal combination scheme of the ore pass inclination angle, inclined chute inclination angle, and shaft diameter to achieve the damage reduction control of the inclined ore pass shaft wall under ore-rock impact.

2. The method for controlling the loss of the inclined shaft wall according to claim 1, characterized in that The establishment of the calculation formula for the initial normal velocity when the ore-rock impacts and contacts the shaft wall according to the structural characteristics of the inclined ore pass includes: According to the structural characteristics of the inclined ore pass, based on the kinetic energy theorem, establish the velocity calculation formula for the ore-rock leaving the inclined chute and entering the shaft section, as shown in formula (1): In the formula, v is the velocity of the ore-rock leaving the inclined chute and entering the shaft section, g is the acceleration due to gravity; μ is the friction coefficient; H1 and H2 are the heights of the ore discharge port and the inclined chute respectively; α is the inclined chute inclination angle; Based on the kinematic principle, combined with the structural characteristics of the inclined ore pass, establish the calculation formula for the initial velocity when the ore-rock impacts and contacts the shaft wall, as shown in formula (2): In the formula, v' is the initial velocity when the ore-rock impacts and contacts the shaft wall, θ is the ore pass inclination angle; D is the shaft diameter.

3. The method for controlling the reduction of the inclined shaft wall loss according to claim 1, characterized in that Based on the Hertz contact theory, an impact response model of the inclined shaft wall is constructed, including: based on the linear elastic contact mechanics theory and the Hertz contact theory, considering the equivalent contact stiffness k * Describing the ability of the shaft wall to resist deformation, introducing the damping c to represent the energy loss during the process of ore-rock impacting the shaft wall, so as to construct an impact response model of the inclined shaft wall under ore-rock impact.

4. The method for controlling the reduction of the inclined shaft wall loss according to claim 1, wherein The establishment of the calculation formulas for the evaluation indexes of shaft wall deformation, ore-rock impact force, and impact kinetic energy under impact for the shaft wall impact damage according to the impact response model of the inclined ore pass shaft wall includes: According to the equivalent Kelvin impact model, the relationship between the ore-rock impact force and the shaft wall deformation and deformation rate is as shown in formula (3): Wherein, F(t) is the impact force function of ore and rock on the shaft wall; δ(t), are respectively the functions of the shaft wall deformation and the deformation rate; t is the time of shaft wall deformation; k * is the equivalent contact stiffness; c is the damping coefficient; According to Newton's second law of motion, the relationship between the ore-rock impact force and the shaft wall deformation acceleration is as shown in formula (4): In the formula, is the function of the deformation acceleration of the shaft wall; m is the mass of the ore and rock; According to the relationship between the impact force of ore and rock, the deformation of the shaft wall, and the acceleration of the shaft wall deformation, combined with the initial conditions δ(t = 0) = 0, The function of the shaft wall deformation is obtained by solving, as shown in formula (5): In the formula, v' is the velocity of the ore-rock when it just contacts the shaft wall, that is, when t = 0; ω and ψ are coefficients; Take the first derivative and second derivative of the shaft wall deformation function δ(t) respectively to obtain the functions of the shaft wall deformation rate and shaft wall deformation acceleration, as shown in formulas (6) and (7): According to the definitions of the impact force and impact kinetic energy, solve to obtain the functions of the ore-rock impact force and impact kinetic energy, as shown in formulas (8) and (9): Respectively take the maximum values of the shaft wall deformation, ore-rock impact force, and impact kinetic energy as the evaluation indexes for the shaft wall impact damage of the inclined ore pass. The maximum values of the three are as shown in formulas (10), (11), and (12): δ m = max[δ(t)](10); F m = max[F(t)] (11); E k,m = max[E k (t)](12); where δ m , F m , E k,m are the maximum shaft wall deformation, the maximum ore-rock impact force, and the maximum ore-rock impact kinetic energy, respectively.

5. A method for controlling the loss reduction of the inclined shaft wall according to claim 4, characterized in that, Equivalent contact stiffness k * and the calculation method of the damping coefficient c is as follows: Based on the equivalent Kelvin impact model and combined with the Hertz contact theory, the calculation formula for the equivalent contact stiffness k * is shown in formula (13) as follows: Where m is the mass of the ore and rock, v is the velocity of the ore and rock leaving the inclined chute and entering the shaft section, and k h is the Hertz contact stiffness; According to the linear elastic contact theory, the calculation formula for the damping coefficient is as shown in formula (14): In the formula, ξ is the modal damping ratio.

6. A method for controlling the loss of the inclined shaft wall according to claim 1, characterized in that Based on the least squares principle, multiple regression models of the maximum shaft wall deformation, maximum ore-rock impact force, and maximum ore-rock impact kinetic energy under the influence of multiple factors are constructed respectively, and the priorities of the raise inclination angle, shaft diameter, and inclined chute inclination angle are clarified from the perspective of shaft wall damage reduction, including: Normalize the maximum values of shaft wall deformation, ore-rock impact force, and impact kinetic energy calculated under the influence of different factors, as well as the control parameters of the raise inclination angle, inclined chute inclination angle, and shaft diameter; According to the normalized data, multiple regression models of the maximum shaft wall deformation, maximum ore-rock impact force, and maximum ore-rock impact kinetic energy under the influence of three factors, namely the raise inclination angle, shaft diameter, and inclined chute inclination angle, are constructed respectively, as shown in formulas (20), (21), and (22): Wherein, are respectively the estimated values of the maximum shaft wall deformation, the maximum ore-rock impact force, and the maximum ore-rock impact kinetic energy, are respectively the estimated values of the raise inclination angle, the shaft diameter, and the inclined chute inclination angle; are respectively the average values of the maximum shaft wall deformation, the maximum ore-rock impact force, and the maximum ore-rock impact kinetic energy, are respectively the average values of the raise inclination angle, the shaft diameter, and the inclined chute inclination angle; λ δ,θ 、λ δ,D 、λ δ,α are respectively the significance coefficients of the influence of the raise inclination angle, the shaft diameter, and the inclined chute inclination angle on the maximum shaft wall deformation; λ F,θ 、λ F,D 、λ F,α are respectively the significance coefficients of the influence of the raise inclination angle, the shaft diameter, and the inclined chute inclination angle on the maximum ore-rock impact force; λ Ek,θ 、λ Ek,D 、λ Ek,α are respectively the significance coefficients of the influence of the raise inclination angle, the shaft diameter, and the inclined chute inclination angle on the maximum ore-rock impact kinetic energy; λ δ 、λ F 、λ Ek are all constants; Based on the multiple regression models of the maximum shaft wall deformation, maximum ore-rock impact force, and maximum impact kinetic energy under the influence of multiple factors, analyze the significance of the raise inclination angle, shaft diameter, and inclined chute inclination angle on the maximum shaft wall deformation, maximum ore-rock impact force, and maximum ore-rock impact kinetic energy, and start from the perspective of shaft wall damage reduction to clarify the priorities of the control parameters of the raise inclination angle, inclined chute inclination angle, and shaft diameter.

7. A method for controlling the loss of the inclined ore pass shaft wall according to any one of claims 1-6, characterized in that, With the principles of minimum shaft wall deformation, minimum ore-rock impact force, and minimum ore-rock impact kinetic energy, select the optimal combination scheme of the raise inclination angle, inclined chute inclination angle, and shaft diameter to achieve the damage reduction control of the inclined raise shaft wall under ore-rock impact. Based on the multi-factor orthogonal scheme and the calculated maximum values of shaft wall deformation, ore-rock impact force, and impact kinetic energy under the influence of different factors, sort them according to the values of the maximum shaft wall deformation, maximum ore-rock impact force, and maximum ore-rock impact kinetic energy respectively, and select the orthogonal scheme with the values of the maximum shaft wall deformation, maximum ore-rock impact force, and maximum ore-rock impact kinetic energy located at the preset values as the optimal combination scheme of the shaft wall damage reduction control parameters to achieve the damage reduction control of the inclined raise shaft wall under ore-rock impact.

8. An inclined ore pass shaft wall loss reduction control system, characterized in that, For implementing the method according to any one of claims 1-7, the system includes the following modules: An initial ore-rock impact velocity determination module, which is used to construct a calculation formula for the initial normal velocity when the ore-rock impacts and contacts the shaft wall according to the structural characteristics of the inclined raise; An inclined raise shaft wall impact response model construction module, which is used to construct an inclined raise shaft wall impact response model based on the Hertz contact theory; A shaft wall impact damage assessment index determination module, which is used to construct calculation formulas for shaft wall impact damage assessment indexes such as shaft wall deformation, ore-rock impact force, and impact kinetic energy under impact according to the inclined raise shaft wall impact response model; A multi-factor orthogonal scheme determination module, which is used to design a multi-factor orthogonal scheme for the raise inclination angle, shaft diameter, and inclined chute inclination angle, and calculate the maximum values of shaft wall deformation, ore-rock impact force, and impact kinetic energy under the influence of different factors respectively; A shaft wall damage reduction control parameter priority determination module, which is used to construct multiple regression models of the maximum shaft wall deformation, maximum ore-rock impact force, and maximum ore-rock impact kinetic energy under the influence of multiple factors based on the least squares principle, and start from the perspective of shaft wall damage reduction to clarify the priorities of control parameters such as the raise inclination angle, shaft diameter, and inclined chute inclination angle; The optimal combination scheme determination module for controlling the reduction of the shaft wall loss is used to select the optimal combination scheme of control parameters such as the inclination angle of the ore pass, the inclination angle of the inclined chute, and the shaft diameter, based on the principles of minimizing the shaft wall deformation, the impact force of the ore and rock, and the impact kinetic energy of the ore and rock, so as to achieve the reduction control of the inclined ore pass shaft wall under the impact of the ore and rock.

9. A computer device, characterized in that, The device includes a processor and a memory. The memory is used to store instructions or computer programs. The processor is used to execute the instructions or computer programs in the memory, so that the device executes the steps of the method according to any one of claims 1-7.

10. A computer-readable storage medium, characterized in that, Instructions are stored in the computer-readable storage medium. When the instructions run on the device, the device executes the steps of the method according to any one of claims 1-7.

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