Method, system and equipment for optimizing structural parameters of high-deep inclined draw shaft and medium

Abstract

The invention discloses a method, a system and equipment for optimizing structural parameters of a high-deep inclined draw shaft and a medium. The method comprises the following steps of: constructing a calculation formula of normal and tangential speeds before an ore rock block impacts a well wall and a calculation formula of horizontal and vertical displacements before the ore rock block impacts the well wall; constructing an ore rock-well wall contact mechanical model and a high-deep inclined draw shaft well wall damage model; constructing a calculation formula of the total well wall damage amount; designing a multi-factor orthogonal scheme of the draw shaft depth, the draw shaft inclination angle, the shaft diameter and the inclined chute inclination angle, and calculating the total shaft wall damage amount; constructing an overall well wall damage quantity multiple regression model under the influence of multiple factors, and determining the importance of preliminary design of different structural parameters of the high-deep inclined draw shaft; and selecting an optimal combination scheme of the draw shaft structure parameters, and optimizing the high-deep inclined draw shaft structure parameters. By optimizing the structural parameters of the high-deep inclined draw shaft, the frequency of impacting the shaft wall by ore rock blocks can be reduced, the degree of impacting the shaft wall can be weakened, and long-period safe and stable operation of a high-deep draw shaft system is guaranteed.

Description

Technical Field

[0001] The present invention belongs to the technical field of prevention and control of engineering geological disasters and resource extraction in underground mines, and particularly relates to a method, system, device and medium for optimizing the structural parameters of a deep and inclined ore pass. Background Art

[0002] The exploitation of deep resources is an inevitable trend for future development, and metal mines with a depth of one kilometer have become the norm. As an important project for the low-cost downward transportation of deep ore and rock, the deep and inclined ore pass is the throat connecting the mine transportation roadway and each intermediate level. Due to the different geological environments, complex mining conditions, and improper selection of structural parameters such as the depth, inclination angle, and shaft diameter of the ore pass in each deep well mine, problems such as well wall depression and wear are likely to occur under the impact wear of ore unloading, and in severe cases, large-scale collapse and damage accidents of the well wall may be induced, affecting the safe and efficient production of the mine.

[0003] At present, there are still deficiencies in the existing control technologies for impact wear of ore pass shaft walls at home and abroad. Li Jiang et al. determined the ore pass support plan through numerical simulation, blocked the collapsed shaft wall, and carried out shotcrete support and steel plate reinforcement on the ore pass shaft wall in the area near the inclined chute (Li Jiang. Analysis of the failure reasons and repair research of the stope ore pass in Dayingezhuang Gold Mine [J]. Mining Technology, 2019, 19(02): 30-32); Remennikov A M et al. carried out full-scale modeling of mine ore passes, and poured high-yield foamed grout above the damaged area of the ore pass shaft wall to prevent instability and collapse caused by high-energy ore and rock impacting the ore pass (Remennikov A M, Mutton V, Nimbalkar S, et al. Experimental and numerical investigation of high-yield grout ore pass plugs to resist impact loads [J]. International Journal of Rock Mechanics and Mining Sciences, 2014, 70: 1-15); Jiang Zhiming et al. proposed a buffer and diversion ore unloading structure at the ore pass inlet in the form of a sill pillar. Based on exploring the impact failure law of the ore pass shaft wall in the ore passing section and solving the collision restitution coefficient between the ore and the shaft wall, it was found that this structure could optimize the operation path of the ore and rock and prevent impact damage to the ore pass shaft wall (Jiang Zhiming, Liu Qiang, Chen Renhe, et al. Similar model test on the impact wear law of the ore flow in the non-ore storage section of the main ore pass in Anqing Copper Mine [J]. Journal of Changsha University of Science and Technology (Natural Science Edition), 2020, 17(03): 22-29.); Bunker K A et al. predicted the impact wear rate of the shaft wall, calculated the optimal size for stable passage of ore and rock, and estimated the service life of the ore pass through statistical analysis and laboratory experiments according to the planned throughput of the ore pass (Bunker K A, Campbell A D, O’Toole D, et al. Guidelines for orepass design in a sublevel cave mine [C]. Design Methods 2015: Proceedings of the International Seminar on Design Methods in Underground Mining. Australian Centre for Geomechanics, 2015: 585-600.).Generally speaking, the existing control technologies for impact wear of the raise wall mainly focus on the reinforcement and support of the damaged area of the raise wall. It is impossible to effectively control the impact wear of the wall by optimizing the structural parameters of the raise, such as the raise inclination angle, raise depth, shaft diameter, and inclined chute inclination angle, which is not conducive to the safe and stable operation of the mine raise system and difficult to meet the actual engineering requirements. Summary of the Invention

[0004] In order to solve at least one of the problems existing in the prior art, the present invention provides a method, system, device, and medium for optimizing the structural parameters of a deep and inclined raise. By constructing a contact mechanics model of ore-rock and raise wall and a damage model of the deep and inclined raise wall, calculating the total wall damage amount, establishing a multiple regression model of the total wall damage amount under the influence of multiple factors, clarifying the importance of the preliminary design of different structural parameters of the deep and inclined raise, and selecting the optimal combination scheme of the raise structural parameters, the problem of collapse and damage of the raise wall is fundamentally solved.

[0005] To achieve the object of the present invention, a method for optimizing the structural parameters of a deep and inclined raise provided by the present invention includes the following steps:

[0006] Step 1: Based on the kinematic principle and combined with the structural characteristics of the deep and inclined raise, derive the calculation formulas for the normal and tangential velocities of the ore-rock block before impacting the wall, as well as the calculation formulas for the horizontal and vertical displacements before impacting the wall.

[0007] Step 2: Based on the quasi-static contact mechanics theory, construct a contact mechanics model of ore-rock and raise wall and a damage model of the deep and inclined raise wall.

[0008] Step 3: Based on the contact mechanics model of ore-rock and raise wall and the damage model of the deep and inclined raise wall, derive the calculation formula for the total wall damage amount.

[0009] Step 4: Design a multi-factor orthogonal scheme for the raise depth, raise inclination angle, shaft diameter, and inclined chute inclination angle, and calculate the total wall damage amount.

[0010] Step 5: Based on the basic principle of the least squares method, construct a multiple regression model of the total wall damage amount under the influence of multiple factors, and clarify the importance of different structural parameters of the deep and inclined raise.

[0011] Step 6: Select the optimal combination scheme of the raise structural parameters with the principle of the minimum total wall damage amount, and optimize the structural parameters of the deep and inclined raise.

[0012] Preferably, Step 1 specifically includes:

[0013] Step 1.1: According to the structural characteristics of the inclined chute in the deep and steep inclined shaft, it can be known from the kinetic energy theorem that the gravitational potential energy of the ore and rock block and the work done by the frictional force generated on the inclined chute wall are converted into the change in kinetic energy of the ore and rock. Then, the calculation formula for the velocity V0 of the ore and rock block leaving the inclined chute and entering the shaft section can be derived, as shown in formula (1):

[0014]

[0015] In the formula, g is the gravitational acceleration; u is the friction coefficient; H1 and H2 are the heights of the ore discharge port and the inclined chute respectively; α is the inclination angle of the inclined chute;

[0016] Step 1.2: According to the structural characteristics of the deep and steep inclined shaft, the calculation formulas for the normal velocity V n(1) and the tangential velocity V t(1) before the ore and rock block first impacts the shaft wall are derived, as well as the calculation formulas for the horizontal displacement X (1) and the vertical displacement Y (1) before the impact on the shaft wall, as shown in formulas (2) and (3):

[0017]

[0018] In the formula, β is the inclination angle of the inclined shaft; Φ is the diameter of the shaft; C is a coefficient, C = (tanα + tanβ) - [(tanα + tanβ) 2 + (2gΦ) / (V0 2 cos 2 αcosβ)] 1 / 2 ;

[0019] Step 1.3: Since the kinetic energy of the ore and rock decreases significantly after the first impact on the shaft wall and it cannot continue to contact the top shaft wall of the inclined shaft, only the impact of the ore and rock on the bottom shaft wall is considered; based on the kinematic principle and the impact theory, the calculation formulas for the normal velocity V n(i) and the tangential velocity V t(i) before the i-th impact on the shaft wall during the bouncing process of the ore and rock block are derived, as well as the calculation formulas for the horizontal displacement X (i) and the vertical displacement Y (i) before the impact, as shown in formulas (4) and (5):

[0020]

[0021] In the formula, V n(i-1) and V t(i-1) are the normal and tangential velocities of the ore and rock block before the (i - 1)-th impact on the shaft wall respectively; λ n(i-1) and λ t(i-1) are the normal and tangential recovery coefficients during the (i - 1)-th impact, and k is the total number of impacts of the ore and rock block on the shaft wall.

[0022] Preferably, in step 2, based on the quasi-static contact mechanics theory, a contact mechanics model of ore-rock and shaft wall is constructed. When the ore-rock block collides with the shaft wall, under the action of the normal impact force I n the ore-rock block is pressed into the shaft wall, and the depth of the shaft wall rock pressure is z m ; under the action of the tangential impact force I t the ore-rock block slides relative to the shaft wall, resulting in wear of the shaft wall, and the wear length of the shaft wall is s; under the combined coupling of the depth of the shaft wall rock pressure and the wear length of the shaft wall, the amount of shaft wall damage W is formed, and based on this, a damage model of the high-deep inclined ore pass shaft wall is constructed.

[0023] Preferably, step 3 specifically includes:

[0024] Step 3.1: According to the law of conservation of energy, during the process of the ore-rock block impacting the shaft wall, the normal impact kinetic energy is converted into the elastic deformation energy of the shaft wall and the energy consumed by plastic deformation. Therefore, the calculation formula of the depth of the shaft wall rock pressure z when the plastic deformation of the shaft wall reaches the maximum, that is, the final depth of the shaft wall rock pressure z m is derived from formula (6);

[0025]

[0026] In the formula, M is the mass of the spherical ore-rock block, M=(4 / 3)πρR 3 ; ρ is the density of the ore-rock; R is the radius of the ore-rock; P is the particle size of the ore-rock, P = 2R; V n is the normal velocity of the ore-rock block before impacting the shaft wall, and the normal velocity of the ore-rock block before the i-th impact on the shaft wall is calculated by formula (4); E e(max) is the maximum elastic deformation energy of the shaft wall; z q , z are respectively the depth of the shaft wall rock pressure at the initial yield of the shaft wall and the depth of the shaft wall rock pressure during the plastic deformation of the shaft wall; I n is the normal impact force of the ore-rock block during the plastic deformation of the shaft wall, and its calculation formula is as shown in formula (7):

[0027] I n =πrσ c (7);

[0028] In the formula, σ c is the initial yield strength of the shaft wall; r is the contact radius between the ore-rock block and the shaft wall during the plastic deformation of the shaft wall, and its calculation formula is as shown in formula (8):

[0029]

[0030] Step 3.2: According to the law of conservation of energy, during the process of the ore-rock block impacting the shaft wall, the change in tangential impact kinetic energy is converted into frictional work; under the action of the tangential impact force, the ore-rock block slides slightly relative to the shaft wall, resulting in wear of the shaft wall. Therefore, the calculation formula of the wear length s of the shaft wall is derived from formula (9);

[0031]

[0032] Wherein, I t is the tangential impact force when the ore-rock block impacts the shaft wall, and I t = uI n(max) ; I n(max) is the maximum value of the normal impact force of the ore-rock block when the shaft wall undergoes plastic deformation, and I n(max) = πz m σ c P / 2; V t is the tangential velocity of the ore-rock block before impacting the shaft wall, and the tangential velocity of the ore-rock block before the i-th impact on the shaft wall is calculated by formula (4); λ t is the tangential restitution coefficient, and its calculation formula is shown in formula (10):

[0033]

[0034] Wherein, λ n is the normal restitution coefficient; η is a coefficient, and η = V n / V t ; E * is the equivalent elastic modulus, and its calculation formula is shown in formula (11):

[0035]

[0036] Wherein, E1 and μ1 are the elastic modulus and Poisson's ratio of the ore-rock block respectively, and E2 and μ2 are the elastic modulus and Poisson's ratio of the shaft wall respectively;

[0037] Step 3.3: Define the amount of shaft wall damage per unit wear length as dW / ds. Therefore, the calculation formula for the amount of shaft wall damage W is derived from formula (12);

[0038]

[0039] Step 3.4: As the number of impacts increases, the kinetic energy of the ore-rock block decreases, and the amount of shaft wall damage decreases. The amount of shaft wall damage after more than 3 impacts can be ignored; Take the first 3 impact positions, calculate the amount of shaft wall damage caused by each impact respectively, and accumulate to obtain the total amount of shaft wall damage; The prerequisite for the ore-rock block to impact the shaft wall for the i-th time is that the total vertical displacement of the ore-rock leaving the inclined chute and entering the shaft section is less than the height of the shaft section of the ore pass. Therefore, the calculation formula for the total amount of shaft wall damage W m is shown in formula (13):

[0040]

[0041] Wherein, H is the depth of the ore pass in the lower section; H3 is the height of the ore bin at the bottom of the ore pass; W i is the amount of shaft wall damage caused by the i-th impact of the ore-rock block on the shaft wall.

[0042] Preferably, in step 3.1, the depth z of the in-situ rock pressure of the shaft wall at the initial yield of the shaft wall q and the maximum elastic deformation energy E of the shaft wall e(max) are calculated as follows:

[0043] Step 3.1.1: Based on the premise that "the normal impact force during the elastic deformation of the shaft wall is equal to the normal impact force during the plastic deformation of the shaft wall", the calculation formula for the depth z of the in-situ rock pressure of the shaft wall at the initial yield is derived from formula (14): q Calculation formula:

[0044] I ne = I n (14);

[0045] In the formula, I ne is the normal impact force of the ore and rock block during the elastic deformation of the shaft wall, and its calculation formula is shown in formula (15):

[0046]

[0047] In the formula, z e is the depth of the in-situ rock pressure of the shaft wall during the elastic deformation of the shaft wall;

[0048] Step 3.1.2: Based on the quasi-static contact mechanics theory, the calculation formula for the maximum elastic deformation energy E of the shaft wall e(max) is shown in formula (16):

[0049]

[0050] In the formula, z e(max) is the maximum in-situ rock pressure depth during the elastic deformation stage of the shaft wall, and its calculation formula is derived according to the initial movement conditions of the ore and rock block combined with Newton's second law shown in formula (17);

[0051]

[0052] In the formula, is the velocity of the ore and rock during impact; it can be known from the general collision process that during the elastic deformation stage of the shaft wall, the velocity of the ore and rock block continuously decreases from the moment of contact with the shaft wall to the moment when the in-situ rock pressure depth reaches the maximum; when , the calculation formula for the maximum in-situ rock pressure depth z of the elastic deformation stage of the shaft wall is derived, as shown in formula (18): e(max) Calculation formula:

[0053]

[0054] Preferably, step 5 specifically includes:

[0055] Step 5.1: To eliminate the influence of measurement units on data analysis, normalize the data of each factor in the multi-factor orthogonal scheme and the corresponding overall shaft wall damage amount in Step 4, as shown in Formula (19):

[0056]

[0057] In the formula: A j is any value in a certain type of data (for example, the overall shaft wall damage amount, the incline angle of the ore pass, the incline angle of the inclined chute, the shaft diameter, the depth of the ore pass); is the average value of a certain type of data, N is the number of samples; A j ' is the dimensionless number after normalization of A j

[0058] Step 5.2: According to the normalized data, construct a multiple regression model of the overall shaft wall damage amount under the influence of four factors: the depth of the ore pass, the incline angle of the ore pass, the shaft diameter, and the incline angle of the inclined chute, as shown in Formula (20):

[0059]

[0060] In the formula: are the estimated values of the overall shaft wall damage amount, the incline angle of the ore pass, the incline angle of the inclined chute, the shaft diameter, and the depth of the ore pass respectively; are the average values of the overall shaft wall damage amount, the incline angle of the ore pass, the incline angle of the inclined chute, the shaft diameter, and the depth of the ore pass respectively; χ H , χ β , χ Φ , χ α are the significance coefficients of the depth of the ore pass, the incline angle of the ore pass, the shaft diameter, and the incline angle of the inclined chute respectively; χ' is a constant.

[0061] Step 5.3: Based on the multiple regression model of the overall shaft wall damage amount under the influence of multiple factors, analyze the significance of each structural parameter of the deep and inclined ore pass on the overall shaft wall damage amount, and clarify the importance grading of each influencing factor in the structure of the deep and inclined ore pass.

[0062] Preferably, in Step 6, after performing an orthogonal experiment on the orthogonal scheme designed in Step 4, sort them in ascending order according to the value of the overall shaft wall damage amount; select the orthogonal scheme whose value of the overall shaft wall damage amount is within the preset value (such as within the 10% quantile) as the optimal combination scheme of the structural parameters of the deep and inclined ore pass, so as to optimize the structural parameters of the deep and inclined ore pass.

[0063] An optimization system for the structural parameters of a deep and inclined ore pass provided by an embodiment of the present invention includes the following modules:

[0064] ​The impact velocity and displacement determination module is used to derive the calculation formulas for the normal and tangential velocities of the ore-rock block before impacting the shaft wall, as well as the calculation formulas for the horizontal and vertical displacements before impacting the shaft wall, based on the kinematic principle and combined with the structural characteristics of the deep and steep inclined ore pass.

[0065] The model construction module is used to construct the ore-rock - shaft wall contact mechanics model and the deep and steep inclined ore pass shaft wall damage model based on the quasi-static contact mechanics theory.

[0066] The overall shaft wall damage amount determination module is used to derive the calculation formula for the overall shaft wall damage amount according to the ore-rock - shaft wall contact mechanics model and the deep and steep inclined ore pass shaft wall damage model.

[0067] The multi-factor orthogonal scheme determination module is used to design a multi-factor orthogonal scheme for the ore pass depth, ore pass inclination, shaft diameter, and inclined ore pass inclination, and calculate the overall shaft wall damage amount.

[0068] The importance grading module for the structural parameters of the deep and steep inclined ore pass is used to construct a multiple regression model for the overall shaft wall damage amount under the influence of multiple factors based on the basic principle of the least squares method, and clarify the importance of different structural parameters of the deep and steep inclined ore pass.

[0069] The optimal scheme determination module for the structural parameters of the deep and steep inclined ore pass is used to select the optimal combination scheme of the ore pass structural parameters with the principle of the minimum overall shaft wall damage amount, and optimize the structural parameters of the deep and steep inclined ore pass.

[0070] An embodiment of the present invention provides a computer device, including 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.

[0071] An embodiment of the present invention provides a computer-readable storage medium, in which instructions are stored. When the instructions run on a device, the device is enabled to execute the steps of any one of the methods.

[0072] Compared with the prior art, the at least achievable beneficial effects of the present invention are as follows:

[0073] 1. By reducing the frequency of the ore-rock block impacting the shaft wall and weakening the degree of impacting the shaft wall, the present invention enhances the ore-rock flow in the ore pass, which is beneficial to the safe and efficient production of the mine.

[0074] 2. By designing a multi-factor orthogonal scheme and calculating the overall shaft wall damage amount, the present invention further selects the optimal combination scheme of each structural parameter of the ore pass, providing technical guidance for optimizing the structural parameters of the deep and steep inclined ore pass.

[0075] 3. The present invention constructs a multiple regression model for the total amount of shaft wall damage under the influence of multiple factors, clarifies the importance of different structural parameters of the ore pass, and provides a theoretical reference for the preliminary design of the structure of deep and inclined ore passes.

[0076] 4. The present invention constructs a damage model for the shaft wall of a deep and inclined ore pass, optimizes the structural parameters of the deep and inclined ore pass, fundamentally prevents large-scale collapse accidents of the shaft wall, and ensures the long-term safe and stable operation of the deep and inclined ore pass system. BRIEF DESCRIPTION OF THE DRAWINGS

[0077] Figure 1 It is a flowchart of a method for optimizing the structural parameters of a deep and inclined ore pass provided by an embodiment of the present invention.

[0078] Figure 2 It is a schematic structural diagram of a system for optimizing the structural parameters of a deep and inclined ore pass provided by an embodiment of the present invention.

[0079] Figure 3 It is a schematic diagram of the basic structure of a deep and inclined ore pass.

[0080] Figure 4 It is a diagram of the movement trajectory of ore and rock in a deep and inclined ore pass in an embodiment of the present invention.

[0081] Figure 5 It is a contact mechanics model diagram of ore and rock - shaft wall in an embodiment of the present invention.

[0082] Figure 6 It is a damage model diagram of the shaft wall of a deep and inclined ore pass in an embodiment of the present invention. DETAILED DESCRIPTION OF THE EMBODIMENTS

[0083] 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 protection of the present invention.

[0084] Please refer to Figure 1 , a method for optimizing the structural parameters of a deep and inclined ore pass provided by an embodiment of the present invention, the method includes the following steps:

[0085] Step 1: Based on the kinematic principle, combined with the structural characteristics of the deep and inclined ore pass, derive the calculation formulas for the normal and tangential velocities of the ore and rock block before impacting the shaft wall, as well as the calculation formulas for the horizontal and vertical displacements before impacting the shaft wall.

[0086] Please refer to Figure 3 and Figure 4, in the deep and steep inclined ore pass structure, β is the ore pass inclination angle; α is the inclined chute inclination angle; Φ is the shaft diameter; H and H0 are the ore pass depths of the lower and upper levels respectively; H1, H2, and H3 are the heights of the ore discharge opening, inclined chute, and bottom ore bin respectively. The ore and rock blocks mined from each level of the mine are discharged at the ore discharge opening, and the discharged ore and rock blocks enter the shaft section of the ore pass through the inclined chute. Due to the special position of the ore discharge chamber in the lower level, the ore and rock blocks impact the shaft wall when leaving the inclined chute and entering the shaft section, and then undergo a series of bounces before finally falling into the bottom ore bin. By combining their movement trajectories in the ore pass, the area where the ore and rock impact the shaft wall can be determined.

[0087] Step 1.1: According to the structural characteristics of the inclined chute in the deep and steep inclined ore pass, it can be known from the kinetic energy theorem that the gravitational potential energy of the ore and rock block and the work done by the frictional force generated on the inclined chute wall are converted into the change in the kinetic energy of the ore and rock block. Then, the calculation formula for the velocity V0 of the ore and rock block when leaving the inclined chute and entering the shaft section can be obtained, as shown in formula (1):

[0088]

[0089] In the formula, g is the gravitational acceleration; u is the friction coefficient; H1 and H2 are the heights of the ore discharge opening and the inclined chute respectively; α is the inclined chute inclination angle.

[0090] Step 1.2: According to the structural characteristics of the deep and steep inclined ore pass, the calculation formulas for the normal velocity V n(1) and tangential velocity V t(1) before the ore and rock block first impacts the shaft wall are derived, as well as the calculation formulas for the horizontal displacement X (1) and vertical displacement Y (1) before the ore and rock block first impacts the shaft wall, as shown in formulas (2) and (3):

[0091]

[0092] In the formula, β is the ore pass inclination angle; Φ is the shaft diameter; C is a coefficient, C = (tanα + tanβ) - [(tanα + tanβ) 2 +(2gΦ) / (V0 2 cos 2 αcosβ)] 1 / 2 .

[0093] Step 1.3: Since the kinetic energy of the ore and rock decreases significantly after the first impact on the shaft wall and it cannot continue to contact the top shaft wall of the ore pass, only the impact of the ore and rock on the bottom shaft wall is considered; based on the kinematic principle and impact theory, the calculation formulas for the normal velocity V n(i) and tangential velocity V t(i) before the i-th impact on the shaft wall during the bouncing process of the ore and rock block are derived, as well as the horizontal displacement X (i) and vertical displacement Y (i)The calculation formula is shown in Formulas (4) and (5):

[0094]

[0095] In the formula, V n(i-1) and V t(i-1) are respectively the normal and tangential velocities of the ore-rock block before the (i - 1)-th impact on the shaft wall; λ n(i-1) and λ t(i-1) are the normal and tangential restitution coefficients during the (i - 1)-th impact, and k is the total number of impacts of the ore-rock block on the shaft wall.

[0096] Step 2: Based on the quasi-static contact mechanics theory, construct the ore-rock - shaft wall contact mechanics model and the high-depth inclined chute shaft wall damage model.

[0097] Please refer to Figure 5 and Figure 6 , based on the quasi-static contact mechanics theory, construct the ore-rock - shaft wall contact mechanics model. When the ore-rock block collides with the shaft wall, under the action of the normal impact force I n , the ore-rock block is pressed into the shaft wall, and the depth of the shaft wall rock pressure is z m ; under the action of the tangential impact force I t , the ore-rock block slides relative to the shaft wall, resulting in wear of the shaft wall, and the wear length of the shaft wall is s; under the combined coupling of the depth of the shaft wall rock pressure and the wear length of the shaft wall, the amount of shaft wall damage W is formed, and based on this, the high-depth inclined chute shaft wall damage model is constructed.

[0098] Step 3: Based on the ore-rock - shaft wall contact mechanics model and the high-depth inclined chute shaft wall damage model, construct the calculation formula for the total amount of shaft wall damage.

[0099] Step 3.1: According to the law of conservation of energy, during the process of the ore-rock block impacting the shaft wall, the normal impact kinetic energy is converted into the elastic deformation energy of the shaft wall and the energy consumed by plastic deformation. Therefore, the calculation formula for the depth of the shaft wall rock pressure z m when the plastic deformation of the shaft wall reaches the maximum, that is, the final depth of the shaft wall rock pressure, is obtained from Formula (6);

[0100]

[0101] In the formula, E e(max) is the maximum elastic deformation energy of the shaft wall; M is the mass of the spherical ore-rock block, M = (4 / 3)πρR 3 , ρ is the density of the ore-rock, R is the radius of the ore-rock; P is the particle size of the ore-rock, P = 2R; V n is the normal velocity of the ore-rock block before impacting the shaft wall, and the normal velocity of the ore-rock block before the i-th impact on the shaft wall is calculated from Formula (4); z q and z are respectively the depth of the shaft wall rock pressure when the shaft wall initially yields and when the shaft wall undergoes plastic deformation; I nIt is the normal impact force of the ore-rock block during the plastic deformation of the shaft wall, and its calculation formula is shown in Formula (7):

[0102] I n = πrσ c (7);

[0103] In the formula, σ c is the initial yield strength of the shaft wall; r is the contact radius between the ore-rock block and the shaft wall during the plastic deformation of the shaft wall, and its calculation formula is shown in Formula (8):

[0104]

[0105] Step 3.1.1: The calculation method of the shaft wall ground pressure depth z q and the maximum elastic deformation energy E e(max) of the shaft wall when the shaft wall initially yields is as follows:

[0106] Based on the premise that "the normal impact force of the ore-rock block during the elastic deformation of the shaft wall is equal to the normal impact force of the ore-rock block during the plastic deformation of the shaft wall", the calculation formula of the shaft wall ground pressure depth z q when the shaft wall initially yields is obtained from Formula (9):

[0107] I ne = I n (9);

[0108] In the formula, I ne is the normal impact force of the ore-rock block during the elastic deformation of the shaft wall, and its calculation formula is shown in Formula (10):

[0109]

[0110] In the formula, z e is the shaft wall ground pressure depth during the elastic deformation of the shaft wall, and E * is the equivalent elastic modulus;

[0111] Step 3.1.2: Based on the quasi-static contact mechanics theory, the calculation formula of the maximum elastic deformation energy E e(max) of the shaft wall is shown in Formula (11):

[0112]

[0113] In the formula, z e(max) is the maximum ground pressure depth during the elastic deformation stage of the shaft wall, and its calculation formula is derived according to the initial motion conditions of the ore-rock block combined with Newton's second law shown in Formula (12);

[0114]

[0115] In the formula, is the velocity of ore and rock during impact; from the general collision process, it can be known that during the elastic deformation stage of the shaft wall, the velocity of the ore and rock block continuously decreases from the moment it starts to contact the shaft wall until the mining pressure depth reaches the maximum; when the maximum mining pressure depth z of the elastic stage of shaft wall deformation is derived, as shown in formula (13): e(max)

[0116]

[0117] Step 3.2: According to the law of conservation of energy, during the process of the ore and rock block impacting the shaft wall, the change in tangential impact kinetic energy is converted into frictional work; under the action of the tangential impact force, the ore and rock block undergoes a small sliding relative to the shaft wall, resulting in wear of the shaft wall. Therefore, the calculation formula for the wear length s of the shaft wall is derived from formula (14);

[0118]

[0119] where I t is the tangential impact force when the ore and rock block impacts the shaft wall, and I t = uI n(max) , and I n(max) is the maximum value of the normal impact force of the ore and rock block during the plastic deformation of the shaft wall, and I n(max) = πz m σ c P / 2; V t is the tangential velocity of the ore and rock block before impacting the shaft wall, and the tangential velocity of the ore and rock block before the i-th impact on the shaft wall is calculated by formula (4); λ t is the tangential recovery coefficient, and its calculation formula is as shown in formula (15):

[0120]

[0121] where λ n is the normal recovery coefficient; η is a coefficient, and η = V n / V t ; E * is the equivalent elastic modulus, and its calculation formula is as shown in formula (16):

[0122]

[0123] where E1 and μ1 are the elastic modulus and Poisson's ratio of the ore and rock block respectively, and E2 and μ2 are the elastic modulus and Poisson's ratio of the shaft wall respectively;

[0124] Step 3.3: Define the amount of shaft wall damage per unit wear length as dW / ds. Therefore, the calculation formula for the amount of shaft wall damage W is derived from formula (17);

[0125]

[0126] ​Step 3.4: As the number of impacts increases, the kinetic energy of the ore-rock block decreases, and the amount of damage to the shaft wall decreases. The amount of damage to the shaft wall after more than 3 impacts can be ignored. Take the first 3 impact positions, calculate the amount of damage to the shaft wall caused by each impact respectively, and accumulate to obtain the total amount of damage to the shaft wall. The prerequisite for the ore-rock block to impact the shaft wall for the i-th time is that the total vertical displacement of the ore-rock block leaving the inclined chute and entering the shaft section is less than the height of the shaft section of the ore pass. Therefore, the total amount of damage to the shaft wall W m is calculated as shown in formula (18):

[0127]

[0128] In the formula, H is the depth of the ore pass in the lower section; H3 is the height of the ore bin at the bottom of the ore pass; W i is the amount of damage to the shaft wall caused by the ore-rock block impacting the shaft wall for the i-th time.

[0129] Step 4: Design a multi-factor orthogonal scheme for the ore pass depth, ore pass inclination angle, shaft diameter, and inclined chute inclination angle, and calculate the total amount of damage to the shaft wall.

[0130] In some embodiments of the present invention, in combination with the actual engineering situation, K different ore pass depths, K different ore pass inclination angles, K different shaft diameters, and K different inclined chute inclination angles are respectively selected to conduct an orthogonal experiment under the influence of four factors. Through the calculation formula of the total amount of damage to the shaft wall, K 4 groups of orthogonal schemes are calculated. In other embodiments, the number of selected ore pass depths, ore pass inclination angles, shaft diameters, and inclined chute inclination angles may not be equal.

[0131] Step 5: Based on the basic principle of the least square method, construct a multiple regression model for the total amount of damage to the shaft wall under the influence of multiple factors, and clarify the importance of different structural parameters of the deep and high inclined ore pass.

[0132] Step 5.1: In order to eliminate the influence of measurement units on data analysis, normalize the data calculated in Step 4, as shown in formula (19):

[0133]

[0134] In the formula: A j is any value in a certain type of data (for example, the total amount of damage to the shaft wall, ore pass inclination angle, inclined chute inclination angle, shaft diameter, ore pass depth); is the average value of a certain type of data, N is the number of samples; A j ' is the dimensionless number after normalization of A j .

[0135] Step 5.2: Based on the normalized data, construct a multiple regression model for the total shaft wall damage amount under the influence of four factors: raise depth, raise inclination angle, shaft diameter, and inclined chute inclination angle, as shown in Equation (20):

[0136]

[0137] In the formula: are the estimated values of the total shaft wall damage amount, raise inclination angle, inclined chute inclination angle, shaft diameter, and raise depth respectively; W m , β, α, Φ, H are the average values of the total shaft wall damage amount, raise inclination angle, inclined chute inclination angle, shaft diameter, and raise depth respectively; χ H , χ β , χ Φ , χ α are the significance coefficients of raise depth, raise inclination angle, shaft diameter, and inclined chute inclination angle respectively; χ' is a constant.

[0138] Step 5.3: Based on the multiple regression model of the total shaft wall damage amount under the influence of multiple factors, analyze the significance of each structural parameter of the deep and inclined raise on the total shaft wall damage amount, and clarify the importance grading of each influencing factor in the deep and inclined raise structure.

[0139] Step 6: Select the optimal combination scheme of raise structural parameters based on the principle of the minimum total shaft wall damage amount to optimize the structural parameters of the deep and inclined raise.

[0140] In some embodiments of the present invention, after performing an orthogonal experiment on the orthogonal scheme designed in Step 4, sort them in ascending order according to the value of the total shaft wall damage amount; select the orthogonal scheme whose total shaft wall damage amount value is within the 10% quantile as the optimal combination scheme of the deep and inclined raise structural parameters, thereby realizing the optimization of the deep and inclined raise structural parameters.

[0141] Please refer to Figure 2 , in some embodiments of the present invention, there is also provided an optimization system for the structural parameters of a deep and inclined raise, which includes the following modules:

[0142] Impact velocity and displacement determination module, which is used to construct calculation formulas for the normal and tangential velocities before the ore-rock block impacts the shaft wall, and calculation formulas for the horizontal and vertical displacements before the ore-rock block impacts the shaft wall based on the kinematic principle and in combination with the structural characteristics of the deep and inclined raise;

[0143] Model construction module, which is used to construct a contact mechanics model of ore-rock - shaft wall and a shaft wall damage model of the deep and inclined raise based on the quasi-static contact mechanics theory;

[0144] Total shaft wall damage amount determination module, which is used to derive the calculation formula for the total shaft wall damage amount according to the contact mechanics model of ore-rock - shaft wall and the shaft wall damage model of the deep and inclined raise

[0145] A multi-factor orthogonal scheme determination module is used to design multi-factor orthogonal schemes for chute depth, chute inclination, wellbore diameter, and inclined chute inclination, and calculate the overall wellbore damage amount;

[0146] The module for grading the importance of structural parameters of deep and deep inclined chutes is used to construct a multivariate regression model of overall wellbore damage under the influence of multiple factors based on the basic principle of least squares method, and to determine the importance of different structural parameters of deep and deep inclined chutes;

[0147] The module for determining the optimal solution for the structural parameters of a high-depth inclined chute is used to select the optimal combination of chute structural parameters based on the principle of minimizing the overall well wall damage, so as to optimize the structural parameters of a high-depth inclined chute.

[0148] In some embodiments of the present invention, a computer device is also provided, including 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.

[0149] 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.

[0150] In some of the embodiments of the present invention, a mine chute system was selected as the engineering framework. The deep 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 depth H of the deep inclined chute in this mine ranges from 60 to 300 m, the chute inclination β ranges from 50° to 89°, the shaft diameter Φ ranges from 1 to 5 m, the inclined chute inclination α ranges from 50° to 89°, the vertical section height H1 of the ore discharge port, the inclined chute height H2, and the bottom ore bin height H3 are 4.4 m, 1.0 m, and 19.6 m, respectively. The ore block size P of the discharged ore is set to 400 mm.

[0151] Table 1 Physical and mechanical parameters of ore and rock

[0152]

[0153] The chute depth H is selected as 60m, 120m, 180m, 240m and 300m, the chute inclination angle β is selected as 50°, 60°, 70°, 80° and 89°, the shaft diameter Φ is selected as 1m, 2m, 3m, 4m and 5m, the inclined chute inclination angle α is selected as 50°, 60°, 70°, 80° and 89°, and the four-factor orthogonal scheme of chute depth, inclination angle, shaft diameter and inclined chute inclination is designed. According to the calculation formula of the overall well wall damage, W is calculated.m The values are shown in Table 2. Due to space limitations, in this embodiment, the schemes with the same calculated value of the overall shaft wall damage amount are combined. The 625 groups of orthogonal schemes are combined into 156 groups of schemes, as shown in Table 2.

[0154] Table 2 Orthogonal Design

[0155]

[0156]

[0157]

[0158] Based on the basic principle of the least squares method, according to the data in Table 2, a multiple regression model of the overall shaft wall damage amount under the influence of four factors, namely the depth of the ore pass, the inclination angle of the ore pass, the diameter of the shaft, and the inclination angle of the inclined chute, is established to obtain the significance of different structural parameters of the ore pass, thereby clarifying the importance of the preliminary design of different structural parameters of the deep and high inclined ore pass.

[0159] By normalizing the data in Table 2, a multiple regression model of the overall shaft wall damage amount under the influence of four factors, namely the depth of the ore pass, the inclination angle of the ore pass, the diameter of the shaft, and the inclination angle of the inclined chute, is constructed, as shown in formula (21):

[0160]

[0161] According to this model, |χ β | = 0.542, |χ α | = 0.523, |χ Φ | = 0.443, |χ H | = 0.020. The significance of each structural parameter of the deep and high inclined ore pass to the overall shaft wall damage amount is β > α > Φ > H. The inclination angle of the ore pass, the inclination angle of the inclined chute, and the diameter of the shaft have a greater impact on the overall shaft wall damage amount, while the depth of the ore pass has a smaller impact on the overall shaft wall damage amount. Therefore, the importance ranking of the structural parameters of the deep and high inclined ore pass from high to low is the inclination angle of the ore pass, the inclination angle of the inclined chute, the diameter of the shaft, and the depth of the ore pass.

[0162] For the orthogonal schemes in Table 2, they are sorted in ascending order according to the value of the overall shaft wall damage amount. Based on the principle of "the smallest overall shaft wall damage amount", the overall shaft wall damage amount at the 10% quantile is 808.19 mm 3 , and the orthogonal schemes with an overall shaft wall damage amount less than 808.19 mm 3 are selected as the optimal combination scheme of the structural parameters of the deep and high inclined ore pass, as shown in Table 3.

[0163] Table 3 Optimal Combination Scheme of Structural Parameters of Deep and High Inclined Ore Pass

[0164]

[0165] From the optimal combination scheme of the structural parameters of the deep and steep inclined ore pass in Table 3, it can be seen that regardless of the values of the ore pass inclination angle, the inclined chute inclination angle, and the shaft diameter, the optimized ore pass depth should not be too large, and should be controlled at about 60 m, not exceeding 120 m. The optimized ore pass inclination angle and the inclined chute inclination angle should both be close to 50° or close to 90°, and the optimized shaft diameter should be within 2 m.

[0166] In the embodiment of the present invention, by constructing a damage model of the deep and steep inclined ore pass shaft wall, calculating the total shaft wall damage amount, establishing a multiple regression model of the total shaft wall damage amount under the influence of multiple factors, clarifying the importance of the preliminary design of different structural parameters of the deep and steep inclined ore pass, and selecting the optimal combination scheme of the ore pass structural parameters. The embodiment of the present invention can reduce the depth of the deep and steep inclined ore pass, reduce the frequency of ore and rock blocks impacting the shaft wall, weaken the degree of ore and rock blocks impacting the shaft wall, enhance the flow of ore and rock in the ore pass, fundamentally prevent large-scale collapse and damage accidents of the shaft wall, ensure the long-term safe and stable operation of the deep and steep inclined ore pass system, and is beneficial to the safe and efficient production of the mine.

[0167] Regarding 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.

[0168] 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 optimizing the structural parameters of a deep and steep inclined shaft, characterized in that It includes the following steps: Based on the kinematic principle and combined with the structural characteristics of the deep and steep inclined ore pass, establish the calculation formulas for the normal and tangential velocities of the ore-rock block before impacting the shaft wall, as well as the calculation formulas for the horizontal and vertical displacements before impacting the shaft wall; Based on the quasi-static contact mechanics theory, establish the ore-rock - shaft wall contact mechanics model and the deep and steep inclined ore pass shaft wall damage model; Based on the ore-rock - shaft wall contact mechanics model and the deep and steep inclined ore pass shaft wall damage model, establish the calculation formula for the total shaft wall damage amount; Design a multi-factor orthogonal scheme for the ore pass depth, ore pass inclination, shaft diameter, and inclined ramp inclination, and calculate the total shaft wall damage amount; Based on the basic principle of the least squares method, establish a multiple regression model for the total shaft wall damage amount under the influence of multiple factors, and clarify the importance of the preliminary design of different structural parameters of the deep and steep inclined ore pass; Taking the minimum total shaft wall damage amount as the principle, select the optimal combination scheme of the ore pass structural parameters and optimize the structural parameters of the deep and steep inclined ore pass.

2. The optimization method for the structural parameters of a deep and steep inclined shaft according to claim 1, characterized in that, The step of based on the kinematic principle and combined with the structural characteristics of the deep and steep inclined ore pass, establishing the calculation formulas for the normal and tangential velocities of the ore-rock block before impacting the shaft wall, as well as the calculation formulas for the horizontal and vertical displacements before impacting the shaft wall, includes: According to the structural characteristics of the inclined ramp in the deep and steep inclined ore pass, it can be known from the kinetic energy theorem that the gravitational potential energy of the ore-rock block and the work done by the frictional force generated on the inclined ramp wall surface are converted into the change in the kinetic energy of the ore-rock. Then, establish the calculation formula for the velocity V0 of the ore-rock block when it leaves the inclined ramp and enters the shaft section, as shown in formula (1): In the formula, g is the acceleration due to gravity; u is the friction coefficient; H1 and H2 are the heights of the ore unloading port and the inclined ramp respectively; α is the inclined ramp inclination; According to the structural characteristics of the deep and steep inclined shaft, the calculation formulas for the normal velocity V n(1) and the tangential velocity V t(1) of the ore and rock block before the first impact on the shaft wall are constructed, as well as the horizontal displacement X (1) and the vertical displacement Y (1) of the ore and rock block before the first impact on the shaft wall, as shown in formulas (2) and (3): In the formula, β is the ore pass inclination; Φ is the shaft diameter; C is a coefficient; Based on the kinematic principle and impact theory, during the process of the ore-rock block bouncing, the calculation formulas for the normal velocity V n(i) and tangential velocity V t(i) before the i-th impact on the shaft wall are constructed, as well as the calculation formulas for the horizontal displacement X (i) and vertical displacement Y (i) are as shown in formulas (4) and (5): Where, V n(i-1) and V t(i-1) are the normal and tangential velocities of the ore-rock block before the (i - 1)-th impact on the shaft wall respectively; λ n(i-1) and λ t(i-1) are the normal and tangential restitution coefficients at the (i - 1)-th impact, and k is the total number of impacts of the ore-rock block on the shaft wall.

3. The method for optimizing the structural parameters of a deep and steep inclined shaft according to claim 1, wherein Based on the quasi-static contact mechanics theory, a contact mechanics model of ore-rock and shaft wall and a damage model of the shaft wall of a deep and inclined ore pass are constructed, including: Based on the quasi-static contact mechanics theory, a contact mechanics model of ore-rock and shaft wall is constructed. When an ore-rock block collides with the shaft wall, under the action of the normal impact force I n , the ore-rock block is pressed into the shaft wall, and the depth of the rock pressure in the shaft wall is z m ; under the action of the tangential impact force I t , the ore-rock block slides relative to the shaft wall, resulting in wear of the shaft wall, and the wear length of the shaft wall is s; under the combined coupling of the depth of the rock pressure in the shaft wall and the wear length of the shaft wall, the damage amount W of the shaft wall is formed, and based on this, a damage model of the shaft wall of a deep and inclined ore pass is constructed.

4. A method for optimizing the structural parameters of a deep and steep inclined shaft, according to claim 1, characterized in that The step of based on the ore-rock - shaft wall contact mechanics model and the deep and steep inclined ore pass shaft wall damage model, establishing the calculation formula for the total shaft wall damage amount, includes: According to the law of conservation of energy, during the impact of the ore-rock block on the shaft wall, the normal impact kinetic energy is converted into the elastic deformation energy of the shaft wall and the energy consumed by plastic deformation. Therefore, the shaft wall rock pressure depth when the plastic deformation of the shaft wall reaches the maximum, that is, the final shaft wall rock pressure depth z m is derived from formula (6); Where, E e(max) is the maximum elastic deformation energy of the shaft wall; M is the mass of the ore-rock block; V n is the normal velocity of the ore-rock block before impacting the shaft wall; z q , z are respectively the shaft wall rock pressure depths at the initial yield of the shaft wall and during the plastic deformation of the shaft wall; z m is the shaft wall rock pressure depth when the ore-rock block is pressed into the shaft wall; I n is the normal impact force of the ore-rock block during the plastic deformation of the shaft wall, and its calculation formula is shown in formula (7): I n = πrσ c (7); where σ c is the initial yield strength of the shaft wall; r is the contact radius between the ore-rock block and the shaft wall during the plastic deformation of the shaft wall, and its calculation formula is shown in formula (8): According to the law of conservation of energy, during the process of the ore-rock block impacting the shaft wall, the change in the tangential impact kinetic energy is converted into the work done by the frictional force; under the action of the tangential impact force, the ore-rock block slides slightly relative to the shaft wall, resulting in shaft wall wear. Therefore, the calculation formula for the shaft wall wear length s is derived from formula (9); where I t is the tangential impact force when the ore-rock block impacts the shaft wall; V t is the tangential velocity of the ore-rock block before impacting the shaft wall; λ t is the tangential restitution coefficient, and its calculation formula is shown in formula (10): where λ n is the normal restitution coefficient; η is the coefficient; E * is the equivalent elastic modulus, and its calculation formula is shown in Formula (11): In the formula, E1 and μ1 are the elastic modulus and Poisson's ratio of the ore-rock block respectively, and E2 and μ2 are the elastic modulus and Poisson's ratio of the shaft wall respectively; Define the shaft wall damage amount per unit wear length as dW / ds. Therefore, the calculation formula for the shaft wall damage amount W is derived from formula (12); The prerequisite for the i-th impact of the ore-rock block on the shaft wall is that the total vertical displacement of the ore-rock leaving the inclined chute and entering the shaft section is less than the height of the shaft section of the ore pass. Therefore, the total amount of shaft wall damage W m is calculated as shown in formula (13): Where H is the depth of the ore pass in the lower middle section; H3 is the height of the ore bin at the bottom of the ore pass; W i is the amount of damage to the shaft wall caused by the impact of the i-th ore and rock block on the shaft wall.

5. A method for optimizing the structural parameters of a deep and steep inclined shaft, according to claim 4, characterized in that The depth of in-situ rock pressure z at the initial yield of the shaft wall q and the maximum elastic deformation energy E of the shaft wall e(max) are calculated as follows: Based on the premise that "the normal impact force during the elastic deformation of the shaft wall is equal to the normal impact force during the plastic deformation of the shaft wall", the calculation formula for the depth of in-situ rock pressure of the shaft wall at the initial yield is derived from formula (14): q ​ I ne = I n (14); Where, I ne is the normal impact force of the ore and rock block during the elastic deformation of the shaft wall, and its calculation formula is shown in formula (15): where z e is the depth of the ground pressure on the shaft wall during elastic deformation of the shaft wall; Based on the quasi-static contact mechanics theory, the maximum elastic deformation energy E of the wellbore wall e(max) is calculated as shown in formula (16): where z e(max) is the maximum mining pressure depth in the elastic deformation stage of the shaft wall.

6. The optimization method for the structural parameters of a deep and steep inclined shaft according to claim 1, characterized in that The step of based on the basic principle of the least squares method, establishing a multiple regression model for the total shaft wall damage amount under the influence of multiple factors, and clarifying the importance of the preliminary design of different structural parameters of the deep and steep inclined ore pass, specifically includes: Normalize the data of each factor in the multi-factor orthogonal scheme and the corresponding total shaft wall damage amount; According to the normalized data, establish a multiple regression model for the total shaft wall damage amount under the influence of four factors: ore pass depth, ore pass inclination, shaft diameter, and inclined ramp inclination, as shown in formula (17): In the formula: are respectively the estimated values of the overall shaft wall damage amount, the inclination angle of the ore pass, the inclination angle of the inclined chute, the shaft diameter, and the depth of the ore pass; are respectively the average values of the overall shaft wall damage amount, the inclination angle of the ore pass, the inclination angle of the inclined chute, the shaft diameter, and the depth of the ore pass; χ H , χ β , χ Φ , χ α are respectively the significance coefficients of the depth of the ore pass, the inclination angle of the ore pass, the shaft diameter, and the inclination angle of the inclined chute; χ' is a constant; Based on the multiple regression model for the total shaft wall damage amount under the influence of multiple factors, analyze the significance of each structural parameter of the deep and steep inclined ore pass on the total shaft wall damage amount, and clarify the importance classification of each influencing factor in the deep and steep inclined ore pass structure.

7. A method for optimizing the structural parameters of a deep and steep inclined shaft, according to any one of claims 1-6, characterized in that Selecting the optimal combination scheme of the ore pass structure parameters based on the principle of the minimum overall shaft wall damage amount, and optimizing the structure parameters of the deep and inclined ore pass, including: after conducting orthogonal tests on the multi-factor orthogonal scheme, sorting in sequence according to the values of the overall shaft wall damage amount; selecting the orthogonal scheme with the value of the overall shaft wall damage amount within the preset value as the optimal combination scheme of the deep and inclined ore pass structure parameters, so as to optimize the structure parameters of the deep and inclined ore pass.

8. An optimization system for the structural parameters of a deep and steep inclined shaft, characterized in that, For implementing the method according to any one of claims 1-7, the system includes the following modules: An impact velocity and displacement determination module, configured to construct calculation formulas for the normal and tangential velocities before the ore-rock block impacts the shaft wall, and calculation formulas for the horizontal and vertical displacements before the ore-rock block impacts the shaft wall, based on the kinematic principle and in combination with the structural characteristics of the deep and inclined ore pass. A model construction module, configured to construct an ore-rock - shaft wall contact mechanics model and a deep and inclined ore pass shaft wall damage model based on the quasi-static contact mechanics theory. An overall shaft wall damage amount determination module, configured to construct a calculation formula for the overall shaft wall damage amount according to the ore-rock - shaft wall contact mechanics model and the deep and inclined ore pass shaft wall damage model. A multi-factor orthogonal scheme determination module, configured to design a multi-factor orthogonal scheme for the ore pass depth, ore pass inclination angle, shaft diameter, and inclined chute inclination angle, and calculate the overall shaft wall damage amount. A deep and inclined ore pass structure parameter importance grading module, configured to construct a multiple regression model of the overall shaft wall damage amount under the influence of multiple factors based on the least squares principle, and clarify the importance of different structure parameters of the deep and inclined ore pass. A deep and inclined ore pass structure parameter optimal scheme determination module, configured to select the optimal combination scheme of the ore pass structure parameters based on the principle of the minimum overall shaft wall damage amount, and optimize the structure parameters of the deep and inclined ore pass.

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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