A mining process for ore body based on stope structure

Abstract

The present invention relates to the field of ore mining technology, and in particular to an ore mining process based on a stope structure, including step S1, sampling rock samples in the area to be mined, and performing force analysis on the sampled samples to obtain the rock types and distribution conditions in the area to be mined; step S2, establishing a three-dimensional model of the area to be mined according to the data information obtained in step S1, and performing mechanical analysis on the mining area; step S3, simulating mining on the established three-dimensional model, and determining the placement positions of support points and safety monitoring sensors during the simulated mining process. The present invention lays a foundation for building a virtual tunnel by sampling and performing mechanical analysis on the ore. When the virtual tunnel is established, the pressure conditions of each point on the tunnel before and after its establishment are collected, and the position of the ore pillar is determined according to the pressure condition analysis, thereby ensuring the accuracy of the installation position of the ore pillar and greatly increasing the safety of underground operations.

Description

Technical Field

[0001] The invention relates to the technical field of ore mining, and in particular to an ore body mining process based on a stope structure. Background Art

[0002] Mining, a comprehensive energy term, is the technology and science of mining mineral resources from the earth's crust and surface. In a broad sense, mining also includes the mining of coal and oil. The mining industry is an important raw material industry. Metallic ores are the main raw materials for the smelting industry, and non-metallic ores are important chemical raw materials and building materials.

[0003] Chinese patent publication number: CN113772324A, discloses a mining process and mining and conveying method, belonging to the technical field of mining and conveying equipment. The mining process and mining and conveying method of the present invention include a mobile unloading funnel and a displacement device, wherein the mobile unloading funnel is mounted on the head of the displacement device; the tail of the displacement device is detachably connected to a lifting device through a connecting section, and the tail of the lifting device is provided with a mobile telescopic device; the intelligent transfer device, the displacement device, the lifting device and the mobile telescopic device are arranged in multiple units in different combinations according to needs; when transferring, they are split into individual units and transferred separately, and the intelligent transfer device can be transferred together with the mobile crushing station; the entire conveying system operation is independently and intelligently controlled.

[0004] It can be seen that during the current ore mining, the tunnel support is often carried out while mining, the distance of the pillars is set according to human experience, the placement position is unclear, and the support safety is insufficient. Summary of the invention

[0005] To this end, the present invention provides an ore body mining process based on a stope structure, so as to overcome the problems in the prior art that the distance of the ore pillars is set according to human experience, the setting position is unclear, and the support safety is insufficient.

[0006] To achieve the above object, the present invention provides an ore body mining process based on a stope structure, comprising:

[0007] Step S1, sampling rock samples in the area to be mined, and performing stress analysis on the samples to obtain the rock types and distribution in the area to be mined;

[0008] Step S2, establishing a three-dimensional model of the area to be mined based on the data information obtained in step S1, and performing mechanical analysis on the mining area;

[0009] Step S3, simulate mining on the established three-dimensional model, and determine the support point positions and the placement positions of safety monitoring sensors during the simulated mining process;

[0010] Step S4, during the actual mining process, setting up the ore pillars and safety monitoring sensors according to the position information determined in step S3.

[0011] In step S3, the position of the support point is preliminarily determined based on the pressure information of each point in the simulated mining process, and after the determination is completed, the support point is simulated and placed with pillars, and the position of the support point is re-determined based on the results of the simulated placement.

[0012] Furthermore, in step S3, the central processing unit monitors the simulated mining process, obtains the pressure changes at various points in the tunnel during the simulated mining process, and determines the positions of the support points and the safety monitoring sensors according to the pressure changes.

[0013] Further, for any of the supporting points, which are points where pillars are set in the tunnel, the safety monitoring sensor is a pressure sensor;

[0014] Any safety monitoring sensor is a pressure sensor, which is arranged in the middle of two adjacent retained ore pillars.

[0015] Furthermore, for any point above the tunnel in the three-dimensional model, the central processing unit obtains the initial pressure value before simulated mining and the pressure value after simulated mining of the point, and the central processing unit determines the risk score of the point based on the relationship between the initial pressure value and the pressure value after simulated mining, and determines the supervision level of the point through the risk score. For different supervision levels, the method of determining the support point is different.

[0016] Furthermore, when calculating the risk score, a calculation compensation parameter of the initial pressure on the risk score and a calculation compensation parameter of the pressure change value on the risk score are set, wherein the value of the calculation compensation parameter of the initial pressure on the risk score is negatively correlated with the value of the initial pressure, and the calculation compensation parameter of the pressure change value on the risk score is positively correlated with the pressure change value;

[0017] The pressure change value is the absolute value of the difference between the initial pressure value and the pressure value after simulated mining.

[0018] Furthermore, the central processor is provided with a first risk score evaluation value F1 and a second risk score evaluation value F2, and the central processor evaluates the risk score FA0.

[0019] If FA0≤F1, the CPU records point A0 as a safe point;

[0020] If F1<FA0≤F2, the central processor records point A0 as a type 1 monitoring point;

[0021] If FA0>F2, the central processing unit records point A0 as a second-class monitoring point.

[0022] Furthermore, if point A0 is a safe point, the central processor obtains point information in the surrounding area of ​​point A0. If all points within the range of the distance L before and after point A0 are safe points, support points and safety monitoring sensors are set at a preset interval H during the actual mining process;

[0023] If point A0 is a safe point, the central processor obtains point information in the surrounding area of ​​point A0. If there are both safe points and first-class monitoring points or second-class monitoring points within the range of the distance L before and after point A0, the distance between the support point and the safety monitoring sensor is re-determined during the actual mining process;

[0024] If point A0 is a Class I monitoring point or a Class II monitoring point, the central processor obtains point information in the surrounding area of ​​point A0. If all points within the range of distance L before and after point A0 are Class I monitoring points or Class II monitoring points, the distance between the support point and the safety monitoring sensor is re-determined during the actual mining process.

[0025] Furthermore, if all points in a section of the area are Class I monitoring points or Class II monitoring points, the central processor integrates the risk score of the section of the area to generate a scoring curve function f(V), and the central processor sums the scoring curve function f(V) to calculate the total regional risk score P;

[0026] The central processor determines the support point setting distance Hp according to the total risk score value P,

[0027] Hp = HP × q1, where q1 is the calculation supplementary parameter for the total risk score value to the support point setting distance;

[0028] If a point in a section of an area contains a safe point, a first-class monitoring point or a second-class monitoring point, the central processor integrates the risk score of the section of the area to generate a scoring curve function f(V1), and the central processor sums the scoring curve function f(V1) to calculate the total regional risk score P1;

[0029] The central processor determines the support point setting distance Hp1 according to the total risk score P1.

[0030] Hp1=H-P1×q2, where q2 is a supplementary parameter for calculating the distance between the total risk score and the support point setting.

[0031] Furthermore, after the support point position is determined, the support equipment is simulated and placed in the simulated mining tunnel according to the determined support point, and the pressure information of each point after the simulated support is obtained. For any point A0, the pressure value information of the pressure value after the simulated support is completed is D21. The central processor is set with a safety pressure value Dz.

[0032] If D21≥Dz, the central processor determines that the pressure information that the corresponding point can withstand is reasonable;

[0033] If D21<Dz, the central processor determines that the pressure information that the corresponding point can withstand is unreasonable.

[0034] Furthermore, the central processor obtains the length of the unreasonable positioning quantity of the pressure information that the points in a section can withstand, recorded as m, and re-determines the setting distance of the support points in the section according to m, and sets the determined distance as Hq.

[0035] Hq=Hu-m×d, where Hu is the preset support point setting distance before adjustment, and d is the calculation compensation parameter for the support point setting distance of the unreasonable pressure information point.

[0036] Compared with the prior art, the beneficial effect of the present invention lies in that, in the present application, before mining, by sampling the ore and performing mechanical analysis, on the one hand, the distribution of the ore is determined, and on the other hand, the foundation for building a virtual tunnel is laid. When the virtual tunnel is established, the pressure conditions of each point on the tunnel before and after its establishment are collected, and the position of the ore pillar is determined based on the pressure condition analysis, thereby ensuring the accuracy of the installation position of the ore pillar and greatly increasing the safety of underground operations.

[0037] Furthermore, by calculating the risk score to more intuitively reflect the calculation results, the subjective errors determined by humans are eliminated, making the determination of the safe position of the pillars more accurate, greatly increasing the safety of underground operations.

[0038] Furthermore, for any point, if its initial pressure is small, it means that the pressure received in its initial situation is relatively loose, and there is a certain risk of collapse. Therefore, the value of the compensation parameter for the calculation of the risk score by the initial pressure is negatively correlated with the initial pressure, which ensures the accuracy of the risk score calculation and greatly increases the safety of underground operations.

[0039] Furthermore, for any point, the greater the pressure change value before and after becoming a tunnel, the greater the pressure change amplitude it withstands, and in this case there is a certain risk of collapse. Therefore, the calculation compensation parameter of the pressure change value for the risk score is positively correlated with the pressure change value, which ensures the accuracy of the risk score calculation and greatly increases the safety of underground operations.

[0040] Furthermore, different risk levels are set for the detection points, and the distances between the support points are determined according to the different risk levels, so that the determination of the support points is more targeted. At the same time, for any area, if all the points within it are safe points, the distances between the support points are determined according to the preset distances; if there are Class I or Class II monitoring points within it, the distances between the support points are adjusted according to the actual situation.

[0041] Furthermore, the higher the score value, the higher the danger. Therefore, for the score curve function, the support point setting distance is adjusted according to its value, which greatly increases the safety of underground operations. BRIEF DESCRIPTION OF THE DRAWINGS

[0042] Figure 1 It is a schematic diagram of the process of ore body mining based on the stope structure in the embodiment. DETAILED DESCRIPTION

[0043] In order to make the objects and advantages of the present invention more clearly understood, the present invention is further described below in conjunction with embodiments; it should be understood that the specific embodiments described herein are only used to explain the present invention and are not used to limit the present invention.

[0044] The preferred embodiments of the present invention are described below with reference to the accompanying drawings. It should be understood by those skilled in the art that these embodiments are only used to explain the technical principles of the present invention and are not intended to limit the protection scope of the present invention.

[0045] It should be noted that, in the description of the present invention, terms such as "up", "down", "left", "right", "inside" and "outside" indicating directions or positional relationships are based on the directions or positional relationships shown in the drawings. This is merely for the convenience of description and does not indicate or imply that the device or element must have a specific orientation, be constructed and operated in a specific orientation. Therefore, it cannot be understood as a limitation on the present invention.

[0046] In addition, it should be noted that in the description of the present invention, unless otherwise clearly specified and limited, the terms "installed", "connected", and "connected" should be understood in a broad sense, for example, it can be a fixed connection, a detachable connection, or an integral connection; it can be a mechanical connection or an electrical connection; it can be a direct connection, or it can be indirectly connected through an intermediate medium, or it can be the internal communication of two components. For those skilled in the art, the specific meanings of the above terms in the present invention can be understood according to specific circumstances.

[0047] See also Figure 1 As shown, Figure 1 It is a schematic diagram of the process of ore body mining based on the stope structure in the embodiment.

[0048] The present application provides an ore body mining process based on a stope structure, comprising:

[0049] Step S1, sampling rock samples in the area to be mined, and performing stress analysis on the samples to obtain the rock types and distribution in the area to be mined;

[0050] Step S2, establishing a three-dimensional model of the area to be mined based on the data information obtained in step S1, and performing mechanical analysis on the mining area;

[0051] Step S3, simulate mining on the established three-dimensional model, and determine the support point positions and the placement positions of safety monitoring sensors during the simulated mining process;

[0052] Step S4, during the actual mining process, setting up the ore pillars and safety monitoring sensors according to the position information determined in step S3.

[0053] In this application, before mining, the ore is sampled and mechanically analyzed to determine the distribution of the ore on the one hand, and to lay the foundation for building a virtual tunnel on the other hand. When establishing the virtual tunnel, the pressure conditions of each point on the tunnel before and after its establishment are collected, and the position of the pillar is determined based on the pressure analysis, which ensures the accuracy of the installation position of the pillar and greatly increases the safety of underground operations.

[0054] In step S3, the central processing unit monitors the simulated mining process and obtains the pressure changes of each point in the tunnel during the simulated mining process. For any point A0, the initial pressure during mining is B0, and after the simulated mining, the pressure of the point A0 in the tunnel is B01;

[0055] The central processor calculates the pressure change value B02 of the point A0, B02=|B0-B01|, and calculates the risk score FA0 of the point A0, setting FA0=B0×c1+B02×c2, where c1 is the calculation compensation parameter of the initial pressure for the risk score, and c2 is the calculation compensation parameter of the pressure change value for the risk score;

[0056] By calculating the risk score, the calculation results are reflected more intuitively, and the subjective errors determined by humans are eliminated, making the determination of the safe position of the pillars more accurate, greatly increasing the safety of underground operations.

[0057] For the initial pressure to risk score calculation compensation parameter c1, its value is determined by the initial pressure B0, and the central processor is provided with the first preset initial pressure to risk score calculation compensation parameter value C11, the second preset initial pressure to risk score calculation compensation parameter value C12, the third preset initial pressure to risk score calculation compensation parameter value C13, the first preset initial pressure evaluation value Bc1, the second preset initial pressure evaluation value Bc2. Among them, C11>C12>C13.

[0058] If B0≤Bc1, the central processor selects the value of C11 as the calculation compensation parameter c1 of the initial pressure on the risk score;

[0059] If Bc1<B0≤Bc2, the central processor selects the value of C12 as the calculation compensation parameter c1 of the initial pressure on the risk score;

[0060] If B0>Bc2, the central processor selects the value of C13 as the calculation compensation parameter c1 of the initial pressure to risk score.

[0061] For any point, if its initial pressure is small, it means that the pressure received in its initial situation is relatively loose, and there is a certain risk of collapse. Therefore, the value of the compensation parameter for the calculation of the risk score by the initial pressure is negatively correlated with the initial pressure, which ensures the accuracy of the risk score calculation and greatly increases the safety of underground operations.

[0062] The central processor also determines the value of the calculation compensation parameter c2 of the pressure change value for the risk score according to the value B02 of the pressure change value. The larger the value B02 is, the larger the value c2 is.

[0063] For any point, the greater the pressure change before and after it becomes a tunnel, the greater the pressure change it is subjected to, and in this case there is a certain risk of collapse. Therefore, the pressure change value for the calculation of the risk score compensation parameter is positively correlated with the pressure change value, ensuring the accuracy of the risk score calculation and greatly increasing the safety of underground operations.

[0064] The central processor is provided with a first risk score evaluation value F1 and a second risk score evaluation value F2. The central processor evaluates the risk score FA0.

[0065] If FA0≤F1, the CPU records point A0 as a safe point;

[0066] If F1<FA0≤F2, the central processor records point A0 as a type 1 monitoring point;

[0067] If FA0>F2, the central processing unit records point A0 as a second-class monitoring point.

[0068] If point A0 is a safe point, the central processor obtains point information in the surrounding area of ​​point A0. If all points within the range of distance L before and after point A0 are safe points, support points and safety monitoring sensors are set according to the preset interval H during the actual mining process;

[0069] If point A0 is a safe point, the central processor obtains point information in the surrounding area of ​​point A0. If there are both safe points and first-class monitoring points or second-class monitoring points within the range of the distance L before and after point A0, the distance between the support point and the safety monitoring sensor is re-determined during the actual mining process;

[0070] If point A0 is a Class I monitoring point or a Class II monitoring point, the central processor obtains point information in the surrounding area of ​​point A0. If all points within the range of distance L before and after point A0 are Class I monitoring points or Class II monitoring points, the distance between the support point and the safety monitoring sensor is re-determined during the actual mining process.

[0071] Different risk levels are set for detection points, and the distances between support points are determined according to different risk levels, so that the determination of support points is more targeted. At the same time, for any area, if all the points within it are safe points, the distances between support points are determined according to the preset distances; if there are Class I or Class II monitoring points within it, the distances between support points are adjusted according to actual conditions.

[0072] For any of the supporting points, which are points where pillars are set in the tunnel, the safety monitoring sensor is a pressure sensor.

[0073] Any safety monitoring sensor is a pressure sensor, which is arranged in the middle of two adjacent retained ore pillars.

[0074] If all points in a section of an area are Class I monitoring points or Class II monitoring points, the central processor integrates the risk score of the section of the area to generate a scoring curve function f(V), and the central processor sums the scoring curve function f(V) to calculate the total regional risk score P.

[0075] The central processor determines the support point setting distance Hp according to the total risk score value P,

[0076] Hp=HP×q1, where q1 is a supplementary parameter for calculating the distance between the total risk score and the support point setting.

[0077] The value of the calculation supplementary parameter q1 of the total risk score for the support point setting distance is positively correlated with the total risk score.

[0078] The higher the score value, the higher the danger. Therefore, for the score curve function, the support point setting distance is adjusted according to its value, which greatly increases the safety of underground operations.

[0079] If a point in an area contains a safe point, a first-class monitoring point or a second-class monitoring point, the central processor integrates the risk score of the area to generate a scoring curve function f(V1), and the central processor sums the scoring curve function f(V1) to calculate the total regional risk score P1.

[0080] The central processor determines the support point setting distance Hp1 according to the total risk score P1.

[0081] Hp1=H-P1×q2, where q2 is a supplementary parameter for calculating the distance between the total risk score and the support point setting.

[0082] After the support point position is determined, the support equipment is simulated and placed in the simulated mining tunnel according to the determined support point, and the pressure information of each point after the simulated support is obtained. For any point A0, the pressure value information of the pressure value after the simulated support is completed is D21. The central processor is set with a safety pressure value Dz.

[0083] If D21≥Dz, the central processor determines that the pressure information that the corresponding point can withstand is reasonable;

[0084] If D21<Dz, the central processor determines that the pressure information that the corresponding point can withstand is unreasonable.

[0085] The central processor obtains the length of the unreasonable positioning number of pressure information that the points in a section can withstand, recorded as m, and re-determines the support point setting distance of the section according to m, and sets the determined distance as Hq.

[0086] Hq=Hu-m×d, where Hu=H or Hp or Hp1, and d is the calculation compensation parameter for the distance between the unreasonable pressure information point and the support point.

[0087] The safety of underground construction is ensured by simulating the placement of pillars at determined support points, verifying safety, and adjusting the positions of support points.

[0088] In the step S1, the mechanical test of the sampled ore includes a tensile test;

[0089] According to the theory of elasticity, the relationship between the tensile stress acting on the longitudinal diameter plane and the applied load P can be expressed by the following formula:

[0090]

[0091] Where: Rt represents tensile strength, unit: MPa;

[0092] P represents the maximum load applied when the rock specimen breaks, in N;

[0093] d represents the diameter of the rock specimen, in mm;

[0094] t represents the thickness of rock specimen, in mm.

[0095] The tensile test results are summarized in Table 1

[0096] Table 1

[0097]

[0098]

[0099] The mechanical tests on the sampled ore also include point load test and uniaxial compression test of the surrounding rock. The results of the point load test are shown in Table 2, and the results of the uniaxial compression test of the surrounding rock are shown in Table 3.

[0100] Table 2

[0101]

[0102] Table 3

[0103]

[0104]

[0105]

[0106] The test summary is shown in Table 4

[0107] Table 4

[0108]

[0109] The relationship between the principal stresses during rock failure was derived by trial and error:

[0110]

[0111] Where:

[0112] σ1 is the maximum principal stress at failure;

[0113] σ3 is the minimum principal stress acting on the rock specimen;

[0114] σ c is the uniaxial compressive strength of the intact rock in the specimen;

[0115] mi is the first constant calculated between the principal stresses; si is the second constant calculated between the principal stresses.

[0116] The mechanical analysis of the modeled model in step S2 includes:

[0117] Determine the strain increment ei of the model rock,

[0118] △e i =△e i e +△e i p (i=1,2,3)

[0119] in, is the elastic strain increment, is the plastic strain increment.

[0120] The expression of elastic strain increment is:

[0121] △σ1=E△e1 e +γ(△e e 2+△e e 3)

[0122] △σ2=E△e e 2+γ(△e e 1+△e e 3)

[0123] △σ3=E△e e 3+γ(△e e 1+△e e 2)

[0124] Where E is the first constant of elastic strain increment, γ is the second constant of elastic strain increment;

[0125] The condition for plastic strain increment is

[0126]

[0127] Where: c is the cohesion; φ is the internal friction angle; Δσ n is the normal stress on the shear plane.

[0128] On the σ1-σ3 plane, AB is the failure envelope, and the Mohr-Coulomb yield equation is:

[0129]

[0130] Where:

[0131] By the law of non-correlated flows:

[0132]

[0133] Where: g is the plastic potential surface; φ is the expansion angle.

[0134] Plastic strain increment:

[0135]

[0136] Where: s It is a function that determines the size of plastic strain and is a non-negative plasticity factor.

[0137] And: i =△σ N i -△σ O i

[0138] Where N and O represent the new and original stress states, respectively.

[0139] make:

[0140] σ'1=σ O 1+E△e1+γ(△e2+△e3)

[0141] σ'2=σ O 2+E△e2+γ(△e1+△e3)

[0142] σ'3=σ O 3+E△e3+γ(△e1+△e2)

[0143] but:

[0144]

[0145] Where: φ is the expansion angle.

[0146] The boundary conditions and initial conditions in the actual modeling process are as follows:

[0147] (1) Fixed constraints are used at the bottom of the model to constrain three-dimensional displacement, horizontal displacement constraints are used on all sides to fix the axial displacement, and the top of the model is a free surface.

[0148] (2) The gravitational acceleration is applied in the negative direction of the Z axis, with a magnitude of 9.81 m / s2.

[0149] (3) In order to ensure that the model boundary environment is closer to the actual stress field of the mine, this simulation not only considers the influence of the self-weight stress field, but also applies lateral stress in the two horizontal directions of the model X and Y. The selection of the lateral pressure value refers to the lateral pressure coefficient method, and the horizontal stress is determined by the following formula:

[0150] σ x =K0·σz

[0151] Where: K0 represents the user-defined lateral pressure coefficient;

[0152] σ z represents the vertical normal stress;

[0153] σ x represents the horizontal normal stress;

[0154] K0 can be calculated using the following formula:

[0155]

[0156] Where: v represents the Poisson's ratio of rock.

[0157] The main surrounding rocks of the Donghu silver-lead-zinc polymetallic mine are crystal tuff, granite porphyry and other rock masses, and the weight of the rock masses is not much different. According to the rock mechanics parameters measured by this rock mechanics indoor experiment, the lateral pressure K0 = 0.43 is calculated. In the numerical simulation calculation process, the vertical self-weight stress at the bottom of the model is about 26MPa, and the horizontal stress is gradually applied according to Ratio = 0.43 as the burial depth increases.

[0158] The calculation compensation parameters and the calculation adjustment parameters described in the present invention have two functions: one is to balance the left and right dimensions of the formula, and the other is to adjust the numerical results. No specific assignment is performed in this embodiment. In addition, the calculation formulas in this embodiment are used to intuitively reflect the adjustment relationship between the various numerical values, such as positive correlation and negative correlation. Unless otherwise specified, the parameter values ​​that are not specifically limited to numerical values ​​are all positive.

[0159] So far, the technical solutions of the present invention have been described in conjunction with the preferred embodiments shown in the accompanying drawings. However, it is easy for those skilled in the art to understand that the protection scope of the present invention is obviously not limited to these specific embodiments. Without departing from the principle of the present invention, those skilled in the art can make equivalent changes or substitutions to the relevant technical features, and the technical solutions after these changes or substitutions will fall within the protection scope of the present invention.

[0160] The above description is only a preferred embodiment of the present invention and is not intended to limit the present invention. For those skilled in the art, the present invention may have various modifications and variations. Any modification, equivalent replacement, improvement, etc. made within the spirit and principle of the present invention shall be included in the protection scope of the present invention.

Claims

1. A mining process based on a stope structure, characterized in that: include, Step S1, sampling rock samples in the area to be mined, and performing stress analysis on the samples to obtain the rock types and distribution in the area to be mined; Step S2, establishing a three-dimensional model of the area to be mined based on the data information obtained in step S1, and performing mechanical analysis on the mining area; Step S3, simulate mining on the established three-dimensional model, and determine the support point positions and the placement positions of safety monitoring sensors during the simulated mining process; Step S4, during the actual mining process, setting support columns and safety monitoring sensors according to the position information determined in step S3; In step S3, the position of the support point is preliminarily determined according to the pressure information of each point in the simulated mining process, and after the determination is completed, the support column is simulated and placed at the support point, and the position of the support point is re-determined according to the result of the simulated placement; In step S3, the central processing unit monitors the simulated mining process, obtains the pressure changes at various points in the tunnel during the simulated mining process, and determines the positions of the support points and the safety monitoring sensors according to the pressure changes; For any point above the tunnel in the three-dimensional model, the central processor obtains the initial pressure value before the simulated mining and the pressure value after the simulated mining of the point, and determines the risk score of the point according to the relationship between the initial pressure value and the pressure value after the simulated mining, and determines the supervision level of the point through the risk score. For different supervision levels, the method of determining the support point is different; When calculating the risk score, a calculation compensation parameter of the initial pressure on the risk score and a calculation compensation parameter of the pressure change value on the risk score are set, wherein the value of the calculation compensation parameter of the initial pressure on the risk score is negatively correlated with the value of the initial pressure, and the calculation compensation parameter of the pressure change value on the risk score is positively correlated with the pressure change value; The pressure change value is the absolute value of the difference between the initial pressure value and the pressure value after simulated mining; The central processor is provided with a first risk score evaluation value F1 and a second risk score evaluation value F2. The central processor evaluates the risk score FA0. If FA0≤F1, the CPU records point A0 as a safe point; If F1<FA0≤F2, the central processor records point A0 as a type 1 monitoring point; If FA0>F2, the central processing unit records point A0 as a second-class monitoring point.

2. The ore body mining process based on stope structure according to claim 1 is characterized in that: For any of the support points, it is a point where a support column is set in the tunnel, and the safety monitoring sensor is a pressure sensor; Any safety monitoring sensor is a pressure sensor, which is arranged in the middle of two adjacent supporting columns.

3. The ore body mining process based on stope structure according to claim 1 is characterized in that: If point A0 is a safe point, the central processor obtains point information in the surrounding area of ​​point A0. If all points within the range of distance L before and after point A0 are safe points, support points and safety monitoring sensors are set according to the preset interval H during the actual mining process; If point A0 is a safe point, the central processor obtains point information in the surrounding area of ​​point A0. If there are both safe points and first-class monitoring points or second-class monitoring points within the range of the distance L before and after point A0, the distance between the support point and the safety monitoring sensor is re-determined during the actual mining process; If point A0 is a Class I monitoring point or a Class II monitoring point, the central processor obtains point information in the surrounding area of ​​point A0. If all points within the range of distance L before and after point A0 are Class I monitoring points or Class II monitoring points, the distance between the support point and the safety monitoring sensor is re-determined during the actual mining process.

4. The ore body mining process based on stope structure according to claim 3 is characterized in that: If all points in a section of the area are Class I monitoring points or Class II monitoring points, the central processor integrates the risk score of the section of the area to generate a scoring curve function f(V), and the central processor sums the scoring curve function f(V) to calculate the total regional risk score P; The central processor determines the support point setting distance Hp according to the total risk score value P, Hp=HP×q1, where q1 is the supplementary parameter for calculating the distance between the total risk score and the support point setting; If a point in a section of the area contains a safe point, a first-class monitoring point or a second-class monitoring point, the central processor integrates the risk score of the section of the area to generate a scoring curve function f(V1), and the central processor sums the scoring curve function f(V1) to calculate the total regional risk score P1; The central processor determines the support point setting distance Hp1 according to the total risk score P1. Hp1=H-P1×q2, where q2 is the supplementary parameter for calculating the distance between the total risk score and the support point setting.

5. The ore body mining process based on stope structure according to claim 4 is characterized in that: After the support point position is determined, the support equipment is simulated and placed in the simulated mining tunnel according to the determined support point, and the pressure information of each point after the simulated support is obtained. For any point A0, the pressure value information of the pressure value after the simulated support is completed is D21. The central processor is set with a safety pressure value Dz. If D21≥Dz, the central processor determines that the pressure information that the corresponding point can withstand is reasonable; If D21<Dz, the central processor determines that the pressure information that the corresponding point can withstand is unreasonable.

6. The ore body mining process based on stope structure according to claim 5 is characterized in that: The central processor obtains the length of the unreasonable positioning number of pressure information that the points in a section can withstand, recorded as m, and re-determines the support point setting distance of the section according to m, and sets the determined distance as Hq. Hq=Hu-m×d, where Hu is the preset support point setting distance before adjustment, and d is the calculation compensation parameter for the support point setting distance of the unreasonable pressure information point.

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