A tin ore recovery method based on sublevel open stope and sublevel filling

Abstract

The present application relates to a kind of based on the tin mining method of sublevel open stoping sublevel filling, comprising, step S1, roof is installed in broken area stope top, mining work is carried out using sublevel open stoping sublevel filling method;Step S2, in mining work, the pressure that the roof is received is compared with the preset pressure by the control device, the height of the roof is adjusted once, the control device compares the degree of ore crushing obtained with the preset crushing degree, and the height of the roof is adjusted twice;Step S3, the control device compares the stability obtained with the preset stability, and the fixing depth of the fixing device is adjusted;Step S4, the control device compares the pressure difference of the first area of the roof with the second area of the roof with the preset pressure difference, and the offset angle of the roof meets the preset standard by controlling the power parameter of the first moving force mechanism and the second moving force mechanism.

Description

TECHNICAL FIELD

[0001] The present application relates to the field of energy, in particular to a tin ore stoping method based on segmented empty field and segmented filling. BACKGROUND

[0002] Tin ore as an important energy plays an important role in economic development, but in the actual mining, the ore on the top of the stope will fall due to its own weight, the influence of mining work and various factors, affecting the safety of workers and hindering the progress of mining. When mining, people often set the top of the stope to prevent ore from falling, but cannot adjust the height and offset angle of the roof according to the actual situation of the stope, which can extend the service life of the roof while ensuring the safety of construction.

[0003] Chinese patent ZL202011508209.0 discloses a roof support protection structure for mining and a using method, which is characterized by comprising a mounting box, an installation cavity is arranged in the mounting box, a double-shaft motor is arranged in the installation cavity, threaded rods are fixedly connected to the output ends of the double-shaft motor, a moving plate is threadedly connected to the threaded rods, a sleeve plate is threadedly connected to the end of the threaded rods extending outward, a positioning plate is fixedly connected to one side of the sleeve plate, a clamping rod is slidingly inserted into the positioning plate, and a plurality of clamping grooves corresponding to the clamping rod are arranged on one side of the moving plate. Only the roof can be reinforced, and the roof cannot be automatically adjusted according to the specific situation of the stope to ensure that the roof can prevent ore from falling while ensuring its stability, so that the safety of the stope can be ensured. SUMMARY

[0004] Therefore, the present application provides a tin ore stoping method based on segmented empty field and segmented filling, which can solve the technical problem that the height, fixing depth and offset angle of the roof cannot be adjusted according to the pressure and stability of the roof.

[0005] To achieve the above purpose, the present application provides a tin ore stoping method based on segmented empty field and segmented filling, which comprises:

[0006] Step S1, the roof is installed on the top of the broken area stope, and the segmented empty field and segmented filling method is used for mining work;

[0007] Step S2, in the mining work, the control device compares the pressure received by the roof with the preset pressure, adjusts the height of the roof by controlling the power parameters of the lifting power mechanism, and compares the crushing degree of the ore body on the upper end of the roof with the preset crushing degree to adjust the height of the roof twice.

[0008] Step S3, when the central control device determines that the height of the roof meets the preset standard, the central control device acquires the stability of the roof through the crushing degree of the upper end of the roof and the pressure received by the roof, and compares the acquired stability with the preset stability, and adjusts the fixing depth of the fixing device by controlling the power parameters of the rotating power mechanism;

[0009] Step S4, when the central control device determines that the fixing depth of the fixing device meets the preset standard, the central control device divides the roof into a first area and a second area, and acquires the pressure difference between the first area and the second area of the roof, and compares the acquired pressure difference with the preset pressure difference, and adjusts the height of the first support column and the second support column by controlling the power parameters of the first linear motion power mechanism and the second linear motion power mechanism, so that the offset angle of the roof meets the preset standard.

[0010] Further, in the step S2, the central control device presets a pressure P, and compares the acquired pressure p received by the roof with the preset pressure, and adjusts the height of the roof once, wherein,

[0011] When p≤P1, the central control device determines to raise the height h of the roof to h1, and sets h1=h×(1+|P1-p| / P1);

[0012] When P1

[0013] When p≥P2, the central control device determines to lower the height h of the roof to h2, and sets h2=h×(1-|P2-p| / P2);

[0014] Wherein, the central control device presets a pressure P, sets a first preset pressure P1 and a second preset pressure P2.

[0015] Further, the central control device presets a crushing degree E, and compares the acquired crushing degree e of the upper end of the roof with the preset crushing degree, and adjusts the height of the roof twice, wherein,

[0016] When e≤E1, the central control device determines to lower the height hi of the roof to hi1, and sets

[0017] When E1

[0018] When e≥E2, the central control device determines to raise the height hi of the roof to hi2, and sets

[0019] Wherein, the central control device presets the breaking degree E, sets the first preset breaking degree E1, the second preset breaking degree E, i = 1, 2.

[0020] Further, the central control device presets the roof height H, compares the acquired roof height with the preset roof height, and adjusts the power parameter of the lifting power mechanism, wherein,

[0021] When hij≤H1, the central control device determines to reduce the power parameter G of the lifting power mechanism to G1, and sets

[0022] When H1<hij<H2, the central control device does not adjust the power parameter of the lifting power mechanism;

[0023] When hij≥H2, the central control device determines to increase the power parameter G of the lifting power mechanism to G1, and sets

[0024] Wherein, the central control device presets the roof height H, sets the first preset roof height H1, the second preset roof height H2, j = 1, 2.

[0025] Further, in the step S3, when the central control device determines that the height of the roof meets the preset standard, the central control device compares the acquired stability k with the preset stability K, and adjusts the fixing depth of the fixing device, wherein,

[0026] When k≤K1, the central control device determines to reduce the fixing depth s of the fixing device to s1, and sets s = s1×(1-|K1-k| / K1 / 2);

[0027] When K1<k<K2, the central control device does not adjust the fixing depth of the fixing device;

[0028] When k≥K2, the central control device determines to increase the fixing depth s of the fixing device to s2, and sets s = s1×(1+|K2-k| / K2 / 2);

[0029] Wherein, the central control device presets the stability K, sets the first preset stability K1, the second preset stability K2.

[0030] Further, the stability k is acquired according to the breaking degree e of the ore and the pressure p received by the roof, and is set as Wherein, e0 is the preset ore breaking degree standard value of the central control device, and p0 is the preset standard value of the pressure received by the roof of the central control device.

[0031] Further, the central control device presets a depth S, compares the fixed depth of the fixing device obtained by the central control device with the preset depth, and adjusts the power parameter of the rotating power mechanism, wherein,

[0032] When sn≤S, the central control device determines to decrease the power parameter of the rotating power mechanism;

[0033] When sn>S, the central control device determines to increase the power parameter of the rotating power mechanism;

[0034] Wherein, n=1, 2.

[0035] Further, in the step S4, when the central control device determines that the height of the top plate and the fixed depth of the fixing device meet the preset standard, the central control device divides the top plate into a first area and a second area based on the center line of the top plate, obtains the difference △p between the pressure p1 received by the first area of the top plate and the pressure p2 received by the second area of the top plate, sets △p=p1-p2, compares the obtained pressure difference with a preset pressure difference △P, and adjusts the tangent value tanw of the offset angle of the top plate, wherein,

[0036] When △p≤△P1, the central control device determines to increase the tangent value tanw of the offset angle of the top plate to tanw1, and sets

[0037] When △P1<△p<△P2, the central control device does not adjust the tangent value of the offset angle of the top plate;

[0038] When △p≥△P2, the central control device determines to decrease the tangent value tanw of the offset angle of the top plate to tanw2, and sets

[0039] Wherein, the central control device presets a pressure difference △P, sets a first preset pressure difference △P1 and a second preset pressure difference △P2, and presets an adjustment parameter Q, sets a first preset adjustment parameter Q1 and a second preset adjustment parameter Q2.

[0040] Further, when the central control device determines to adjust the offset angle of the top plate, the central control device presets an offset angle tangent value tanW, compares the obtained offset angle tangent value with the preset offset angle tangent value, and adjusts the height of the first support column and the second support column, wherein,

[0041] When tanwm≤tanW1, the central control device determines to increase the height L2 of the second support column to L2', and sets

[0042] When tanW1 < tanwm < tanW2, the central control device does not adjust the height of the first support column and the second support column;

[0043] When tanwm ≥ tanW2, the central control device determines to increase the height L1 of the first support column to L1', sets

[0044] Wherein, the central control device presets the tangent value tanW of the offset angle, sets the first preset tangent value tanW1 of the offset angle, the second preset tangent value tanW2 of the offset angle, and m = 1, 2.

[0045] Further, the central control device presets the first height L01 and the second height L02, compares the obtained height of the first support column with the preset first height, adjusts the power parameter of the first moving force mechanism, compares the obtained height of the second support column with the preset second height, and adjusts the power parameter of the second moving force mechanism, wherein

[0046] When L1' ≤ L01, the central control device determines to reduce the power parameter of the first moving force mechanism;

[0047] When L1' > L01, the central control device determines to increase the power parameter of the first moving force mechanism;

[0048] When L2' ≤ L02, the central control device determines to reduce the power parameter of the second moving force mechanism;

[0049] When L2' > L02, the central control device determines to increase the power parameter of the second moving force mechanism.

[0050] Compared with the prior art, the beneficial effects of the present application are that the central control device compares the obtained pressure on the roof with the preset pressure, adjusts the height of the roof once by controlling the power parameters of the lifting power mechanism, compares the obtained degree of ore crushing with the preset degree of crushing, and adjusts the height of the roof twice, so that the roof can prevent ore from falling, and the roof will not deform and lose its function due to being too close to the top of the stope and bearing too much pressure, when the central control device determines that the height of the roof meets the preset standard, the central control device obtains the stability by the degree of ore crushing and the pressure on the roof, compares the obtained stability with the preset stability, and adjusts the fixing depth of the fixing device by controlling the power parameters of the rotating power mechanism, so as to avoid the roof from falling from the top of the stope due to insufficient stability, when the central control device determines that the fixing depth of the fixing device meets the preset standard, the central control device divides the roof into a first area and a second area, and obtains the pressure difference between the first area and the second area of the roof, the central control device compares the obtained pressure difference with the preset pressure difference, adjusts the height of the first support column and the second support column by controlling the power parameters of the first linear motion power mechanism and the second linear motion power mechanism, so that the offset angle of the roof meets the preset standard, so that when the ore collapses, the roof can be adjusted in time to prevent collapse and ensure construction safety.

[0051] Especially, the central control device compares the obtained pressure on the roof with the preset pressure, and adjusts the height of the roof, wherein when the central control device obtains the pressure on the roof less than or equal to the first preset pressure, it indicates that the adhesion of the roof to the ore on the top of the stope is low, and the supporting force on the top of the stope is small, therefore, the central control device determines to raise the height of the roof, when the central control device obtains the pressure on the roof greater than or equal to the second preset pressure, it indicates that the adhesion of the roof to the top of the stope is too close, and is prone to deformation and loss of supporting ability, therefore, the central control device determines to lower the height of the roof.

[0052] Especially, the central control device compares the obtained degree of crushing of the ore on the upper end of the roof with the preset degree of crushing, and further adjusts the height of the roof, wherein when the central control device obtains the degree of crushing of the ore less than or equal to the first preset degree of crushing, it indicates that the ore on the top of the stope is less likely to fall, and the roof does not need to have a particularly large supporting force on the top of the stope, therefore, the central control device reduces the power parameters of the lifting power mechanism to lower the height of the roof, when the central control device obtains the degree of crushing of the ore greater than or equal to the second preset degree of crushing, it indicates that the ore on the top of the stope is prone to falling, and the roof needs to be closely attached to the top of the stope to prevent the ore from falling, therefore, the central control device increases the power parameters of the lifting power mechanism to raise the height of the roof.

[0053] Especially, the central control device obtains the stability according to the crushing degree of the ore and the pressure on the roof, compares the obtained stability with the preset stability, and adjusts the fixing depth of the fixing device, wherein when the stability obtained by the central control device is less than or equal to the first preset stability, it indicates that the crushing degree of the ore on the top of the stope is small, the pressure on the roof is also small, and the roof is not easy to fall off, therefore, in order to minimize the influence on the structure of the ore in the stope, the central control device reduces the fixing depth of the fixing device in the ore by reducing the power parameter of the rotating power mechanism, when the stability obtained by the central control device is greater than or equal to the second preset stability, it indicates that the crushing degree of the ore on the top of the stope is large, the pressure on the roof is also large, in order to avoid the roof from falling off, the central control device increases the fixing depth of the fixing device in the ore by increasing the power parameter of the rotating power mechanism.

[0054] Especially, the central control device divides the roof into a first area and a second area based on the center line of the roof, obtains the difference between the pressure on the first area of the roof and the pressure on the second area of the roof, and compares the obtained pressure difference with a preset pressure difference to adjust the tangent value of the offset angle of the roof, wherein when the pressure difference obtained by the central control device is less than or equal to the first preset pressure difference, it indicates that the pressure on the first area of the roof is less than the pressure on the second area of the roof, at this time, the ore in the second area collapses, in order to avoid the ore from falling off, the central control device increases the height of the second support column by increasing the power parameter of the second moving power mechanism, so that the height of the second area of the roof is higher than that of the first area, so that the offset angle of the roof meets the preset standard, when the pressure difference obtained by the central control device is greater than or equal to the second preset pressure difference, it indicates that the pressure on the first area of the roof is greater than the pressure on the second area of the roof, at this time, the ore in the first area collapses, in order to avoid the ore from falling off, the central control device increases the height of the first support column by increasing the power parameter of the first moving power mechanism, so that the height of the first area of the roof is higher than that of the second area, so that the offset angle of the roof meets the preset standard. BRIEF DESCRIPTION OF DRAWINGS

[0055] Figure 1 Structure schematic diagram of the stope roof adjusting system based on the segmented open stope and the segmented filling of the invention;

[0056] Figure 2 Flowchart of the stope mining method based on the segmented open stope and the segmented filling of the invention. DETAILED DESCRIPTION

[0057] In order to make the objects, technical schemes and advantages of the present application clearer, the following further describes the present application with reference to the embodiments. It should be understood that the specific embodiments described herein are only used to explain the present application and not to limit the present application.

[0058] The preferred embodiments of the present application are described below with reference to the drawings. Those skilled in the art should understand that the embodiments are only used to explain the technical principles of the present application and not to limit the protection scope of the present application.

[0059] It should be noted that, in the description of the present application, the terms indicating the direction or positional relationship such as "upper", "lower", "left", "right", "inner", "outer" and the like are based on the direction or positional relationship shown in the drawings, which is only 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, and therefore cannot be understood as a limitation on the present application.

[0060] In addition, it should also be noted that, in the description of the present application, unless otherwise explicitly specified and limited, the terms "mounting", "connecting", "connection" should be understood broadly, for example, it can be fixed connection, or detachable connection, or integral connection; it can be mechanical connection, or electrical connection; it can be direct connection, or indirect connection through an intermediate medium, or internal communication of two elements. Those skilled in the art can understand the specific meaning of the above terms in the present application according to the specific circumstances.

[0061] Please refer to Figure 1 Fig. 1 is a schematic structural diagram of a roof adjusting system for tin ore recovery based on segmented open field and segmented filling according to an embodiment of the present application, which comprises,

[0062] A roof 1 is arranged at the top of the mining field for preventing ore from falling;

[0063] A lifting device is connected with the roof for controlling the height of the roof, wherein the lifting device comprises a lifting motor 201 for providing power for adjusting the height of the roof, and a telescopic rod 202 connected with the lifting motor;

[0064] A fixing device is connected with the lifting device for fixing the roof at the top of the mining field, wherein the fixing device comprises a fixing nail 301 for being inserted into the ore wall for fixing, and a rotating motor 302 connected with the fixing nail for controlling the depth of the fixing nail inserted into the ore wall;

[0065] The offset device is connected with the roof plate and used for adjusting the offset angle of the roof plate, wherein the offset device comprises a first offset mechanism connected with one side of the roof plate and a second offset mechanism connected with the other side of the roof plate, the first offset mechanism comprises a first connecting rod 401 connected with one side of the roof plate, a first supporting column 402 connected with the first connecting rod, a first rotating block 403 connected with the end of the first connecting rod, and a first motor 404 used for providing power for height adjustment of the first supporting column, and the second offset mechanism comprises a second connecting rod 405 connected with the other side of the roof plate, a second rotating block 406 connected with the end of the second connecting rod, a second supporting column 407 connected with the second connecting rod, and a second motor 408 used for providing power for height adjustment of the second supporting column

[0066] Referring to Figure 2 As shown in the figure, it is a tin ore recovery method flow chart based on the segmented open field segmented filling of the embodiment of the present application, comprising,

[0067] Step S1, the roof plate is installed on the top of the broken area stope, and the segmented open field segmented filling method is used for mining work;

[0068] Step S2, in the mining work, the central control device compares the pressure received by the roof plate with the preset pressure, and adjusts the height of the roof plate by controlling the power parameters of the lifting power mechanism, and the central control device compares the broken degree of the ore body on the upper end of the roof plate with the preset broken degree, and adjusts the height of the roof plate for the second time;

[0069] Step S3, when the central control device determines that the height of the roof plate meets the preset standard, the central control device obtains the stability by the broken degree of the ore body on the upper end of the roof plate and the pressure received by the roof plate, and compares the obtained stability with the preset stability, and adjusts the fixing depth of the fixing device by controlling the power parameters of the rotating power mechanism;

[0070] Step S4, when the central control device determines that the fixing depth of the fixing device meets the preset standard, the central control device divides the roof plate into a first area and a second area, and obtains the pressure difference between the first area of the roof plate and the second area of the roof plate, and the central control device compares the obtained pressure difference with the preset pressure difference, and adjusts the heights of the first supporting column and the second supporting column by controlling the power parameters of the first linear motion power mechanism and the second linear motion power mechanism, so that the offset angle of the roof plate meets the preset standard.

[0071] Specifically, the present application does not specifically limit the method of tin ore recovery, which can be processed according to the existing tin ore recovery method, and the embodiment of the present application provides a preferred embodiment, comprising,

[0072] For the broken areas in the west and the east, the segmented open field segmented filling mining method is used.

[0073] The stage height of the mining field is 20 m, the sublevel height is 20 m, one sublevel, no pillar is left from the upper disc or the lower disc broken zone, the mining height is reduced, the exposed area of the upper disc and the roof is reduced, in addition, the mining, ore extraction and filling time is changed from 4 months to 2 months, the exposed time of the upper disc and the roof is reduced, the mining work is won, in the mining work process, the above measures are taken to ensure the stability and bearing capacity of the roof, so that the mining work of the mining field in the broken area can be carried out smoothly, although part of the mining preparation engineering is increased, the ore recovery rate is greatly improved, and great economic benefits are brought to the enterprise.

[0074] For the relatively stable central area, a sublevel drilling stage ore extraction and empty field subsequent filling mining method is used.

[0075] For the central stable area, simulation experiments are carried out, the stage height of the mining field is increased to 60 m, the sublevel height is 20 m, three sublevels, anchor rod + long anchor cable support pre-control top technical measures are added in the uppermost middle section to improve the stability and bearing capacity of the roof, and the size of the mining field is controlled within a reasonable range, so that the mining cycle number is reduced, the ore extraction access of one middle section is reduced, the mining preparation engineering is saved, the ore extraction efficiency is improved, and the cost is saved.

[0076] Filling: according to the rock conditions, specific modeling analysis, 60 m section high filling body self-standing, one-step filling strength changes from 4 MPa to 2-2.5 MPa, saving cement consumption, saving cost.

[0077] In the step S2, the central control device presets a pressure P, the central control device compares the pressure p received by the roof with the preset pressure, and adjusts the height of the roof once, wherein,

[0078] When p≤P1, the central control device determines to raise the height h of the roof to h1, and sets h1=h×(1+|P1-p| / P1);

[0079] When P1

[0080] When p≥P2, the central control device determines to lower the height h of the roof to h2, and sets h2=h×(1-|P2-p| / P2);

[0081] Wherein, the central control device presets a pressure P, sets a first preset pressure P1 and a second preset pressure P2.

[0082] Specifically, the pressure received by the roof refers to the average value of the large pressure received by the first area and the second area of the roof.

[0083] Specifically, the central control device compares the pressure received by the roof with a preset pressure and adjusts the height of the roof accordingly. When the pressure received by the central control device is less than or equal to the first preset pressure, it indicates that the roof is not in close contact with the ore at the top of the stope and provides less support. Therefore, the central control device determines to raise the height of the roof. When the pressure received by the central control device is greater than or equal to the second preset pressure, it indicates that the roof is not in close contact with the top of the stope and is prone to deformation and loss of support. Therefore, the central control device determines to lower the height of the roof.

[0084] The central control device presets a crushing degree E. It compares the acquired crushing degree e of the ore body at the upper part of the roof with the preset crushing degree and then performs a secondary adjustment to the height of the roof.

[0085] When e≤E1, the central control device determines to lower the height hi of the top plate to hi1, and sets...

[0086] When E1 < e < E2, the central control device does not adjust the height of the top plate;

[0087] When e≥E2, the central control device determines that the height hi of the raised top plate should be increased to hi2, and sets...

[0088] The central control device presets the degree of crushing E, sets a first preset degree of crushing E1, a second preset degree of crushing E, and i = 1, 2.

[0089] Specifically, the embodiments of the present invention do not limit the method of obtaining the degree of crushing, as long as it can evaluate the degree of crushing of the ore body at the upper end of the roof. The embodiments of the present invention provide a preferred implementation scheme, which obtains the quantity and particle size of the ore on the roof by setting an image acquisition device, and obtains the degree of crushing of the ore body at the upper end of the roof according to e=(N1×D1+N1×D1+···+Nk×Dk), where k is a non-zero natural number, D is the particle size of the ore, and N is the quantity of ore with a particle size of D.

[0090] The central control device presets a top plate height H. The central control device compares the acquired top plate height with the preset top plate height and adjusts the power parameters of the lifting power mechanism accordingly.

[0091] When hij≤H1, the central control device determines to reduce the power parameter G of the lifting power mechanism to G1, and sets...

[0092] When H1 < hij < H2, the central control device does not adjust the power parameters of the lifting power mechanism;

[0093] When hij≥H2, the central control device determines to increase the power parameter G of the lifting power mechanism to G1, sets

[0094] Wherein, the central control device presets the roof height H, sets the first preset roof height H1 and the second preset roof height H2, j = 1, 2.

[0095] Specifically, the central control device compares the obtained fragmentation degree of the roof upper end ore body with the preset fragmentation degree, and further adjusts the roof height, wherein when the central control device obtains the ore fragmentation degree less than or equal to the first preset fragmentation degree, it indicates that the ore at the top of the stope is less likely to fall off, and the roof does not need to have a particularly large supporting force on the stope roof, so the central control device reduces the height of the roof by reducing the power parameter of the lifting power mechanism, and when the central control device obtains the ore fragmentation degree greater than or equal to the second preset fragmentation degree, it indicates that the ore at the top of the stope is prone to fall off, and the roof needs to be closely attached to the top of the stope to prevent the ore from falling off, therefore, the central control device increases the height of the roof by increasing the power parameter of the lifting power mechanism.

[0096] In the step S3, when the central control device determines that the height of the roof meets the preset standard, the central control device compares the obtained stability k with the preset stability K, and adjusts the fixing depth of the fixing device, wherein,

[0097] When k≤K1, the central control device determines to reduce the fixing depth s of the fixing device to s1, and sets s = s1×(1- |K1-k| / K1 / 2);

[0098] When K1

[0099] When k≥K2, the central control device determines to increase the fixing depth s of the fixing device to s2, and sets s = s1×(1+ |K2-k| / K2 / 2);

[0100] Wherein, the central control device presets the stability K, sets the first preset stability K1 and the second preset stability K2.

[0101] The stability k is obtained according to the fragmentation degree e of the ore and the pressure p received by the roof, and is set as Wherein, e0 is the standard value of the ore fragmentation degree preset by the central control device, and p0 is the standard value of the pressure received by the roof preset by the central control device.

[0102] The central control device presets a depth S, compares the fixed depth of the fixing device obtained by the central control device with the preset depth, and adjusts the power parameter of the rotating power mechanism, wherein,

[0103] When sn≤S, the central control device determines to reduce the power parameter of the rotating power mechanism;

[0104] When sn>S, the central control device determines to increase the power parameter of the rotating power mechanism;

[0105] Wherein, n=1, 2.

[0106] Specifically, the central control device obtains the stability according to the crushing degree of the ore and the pressure received by the roof, and compares the obtained stability with a preset stability to adjust the fixed depth of the fixing device. When the stability obtained by the central control device is less than or equal to a first preset stability, it indicates that the crushing degree of the ore on the top of the stope is small, and the pressure received by the roof is also small, so the roof is not easy to fall. Therefore, in order to minimize the impact on the ore structure of the stope, the central control device reduces the fixed depth of the fixing device in the ore by reducing the power parameter of the rotating power mechanism. When the stability obtained by the central control device is greater than or equal to a second preset stability, it indicates that the crushing degree of the ore on the top of the stope is large, and the pressure received by the roof is also large. In order to avoid the roof from falling, the central control device increases the fixed depth of the fixing device in the ore by increasing the power parameter of the rotating power mechanism.

[0107] In the step S4, when the central control device determines that the height of the roof and the fixed depth of the fixing device meet the preset standard, the central control device divides the roof into a first area and a second area based on the center line of the roof. The central control device obtains the difference Δp between the pressure p1 received by the first area of the roof and the pressure p2 received by the second area of the roof, and sets Δp=p1-p2. The central control device compares the obtained pressure difference with a preset pressure difference ΔP, and adjusts the tangent value tanw of the roof offset angle, wherein,

[0108] When Δp≤ΔP1, the central control device determines to increase the tangent value tanw of the roof offset angle to tanw1, and sets

[0109] When ΔP1<Δp<ΔP2, the central control device does not adjust the tangent value of the roof offset angle;

[0110] When Δp≥ΔP2, the central control device determines to reduce the tangent value tanw of the roof offset angle to tanw2, and sets

[0111] The central control device is preset with a pressure difference ΔP, a first preset pressure difference ΔP1, and a second preset pressure difference ΔP2, and is preset with an adjustment parameter Q, a first preset adjustment parameter Q1, and a second preset adjustment parameter Q2.

[0112] Specifically, the adjustment parameter is not specifically limited, and the embodiment of the application provides a preferred embodiment, wherein Q1=1.1-1.6 and Q2=0.7-0.9.

[0113] When the central control device determines to adjust the offset angle of the top plate, the central control device is preset with a tangent value tanW of the offset angle, and compares the obtained tangent value of the offset angle with the preset tangent value of the offset angle, and adjusts the height of the first support column and the second support column, wherein

[0114] When tanwm≤tanW1, the central control device determines to increase the height L2 of the second support column to L2', and sets

[0115] When tanW1

[0116] When tanwm≥tanW2, the central control device determines to increase the height L1 of the first support column to L1', and sets

[0117] The central control device is preset with a tangent value tanW of the offset angle, sets a first preset tangent value tanW1 and a second preset tangent value tanW2 of the offset angle, and m=1, 2.

[0118] Specifically, the central control device establishes a rectangular coordinate system with the center of the top plate as the origin, the transverse direction as the x-axis, and the longitudinal direction as the y-axis, and obtains the tangent value of the offset angle of the top plate.

[0119] The central control device is preset with a first height L01 and a second height L02, compares the obtained height of the first support column with the preset first height, adjusts the power parameter of the first moving force mechanism, compares the obtained height of the second support column with the preset second height, and adjusts the power parameter of the second moving force mechanism, wherein

[0120] When L1'≤L01, the central control device determines to reduce the power parameter of the first moving force mechanism.

[0121] When L1'>L01, the central control device determines to increase the power parameter of the first moving force mechanism.

[0122] When L2'≤L02, the central control device determines to reduce the power parameter of the second moving force mechanism;

[0123] When L2'>L02, the central control device determines to increase the power parameter of the second moving force mechanism.

[0124] Specifically, the central control device divides the roof into a first area and a second area based on the center line of the roof, obtains the difference between the pressure received by the first area of the roof and the pressure received by the second area of the roof, compares the obtained pressure difference with a preset pressure difference, and adjusts the tangent value of the offset angle of the roof. When the pressure difference obtained by the central control device is less than or equal to a first preset pressure difference, it indicates that the pressure received by the first area of the roof is less than the pressure received by the second area of the roof at this time, and the ore in the second area collapses at this time. In order to avoid the falling of the ore, the central control device increases the height of the second support column by increasing the power parameter of the second moving force mechanism, so that the height of the second area of the roof is higher than that of the first area, so that the offset angle of the roof meets the preset standard. When the pressure difference obtained by the central control device is greater than or equal to a second preset pressure difference, it indicates that the pressure received by the first area of the roof is greater than the pressure received by the second area of the roof at this time, and the ore in the first area collapses at this time. In order to avoid the falling of the ore, the central control device increases the height of the first support column by increasing the power parameter of the first moving force mechanism, so that the height of the first area of the roof is higher than that of the second area, so that the offset angle of the roof meets the preset standard.

[0125] So far, the technical solutions of the present application have been described in combination with the preferred embodiments shown in the drawings, but those skilled in the art can easily understand that the protection scope of the present application is obviously not limited to these specific embodiments. Those skilled in the art can make equivalent changes or replacements to related technical features without departing from the principles of the present application, and the technical solutions after these changes or replacements will fall within the protection scope of the present application.

Claims

1. A tin ore mining method based on segmented open space and segmented filling, characterized in that, include: Step S1: Install the roof plate on the top of the crushed area stope and carry out mining work using the segmented open area and segmented filling method; Step S2: During mining operations, the central control device compares the pressure on the roof with the preset pressure, and adjusts the height of the roof by controlling the power parameters of the lifting power mechanism. The central control device also compares the degree of crushing of the ore body at the upper end of the roof with the preset degree of crushing, and adjusts the height of the roof a second time. Step S3: When the central control device determines that the height of the top plate meets the preset standard, the central control device obtains the stability by the degree of crushing of the ore body at the upper end of the top plate and the pressure on the top plate, and compares the obtained stability with the preset stability, and adjusts the fixing depth of the fixing device by controlling the power parameters of the rotating power mechanism. Step S4: When the central control device determines that the fixing depth of the fixing device meets the preset standard, the central control device divides the top plate into a first area and a second area, and obtains the pressure difference between the first area and the second area. The central control device compares the obtained pressure difference with the preset pressure difference, and adjusts the height of the first support column and the second support column by controlling the power parameters of the first moving force mechanism and the second displacement power mechanism so that the offset angle of the top plate meets the preset standard.

2. The tin ore recovery method based on segmented open space and segmented filling according to claim 1, characterized in that, In step S2, the central control device presets a pressure P. The central control device compares the pressure p received from the top plate with the preset pressure and adjusts the height of the top plate accordingly. When p≤P1, the central control device determines to raise the height h of the top plate to h1, and sets h1=h×(1+|P1-p| / P1). When P1 < p < P2, the central control device does not adjust the height of the top plate; When p≥P2, the central control device determines to lower the height h of the top plate to h2, and sets h2=h×(1-|P2-p| / P2). The central control device has a preset pressure P, a first preset pressure P1, and a second preset pressure P2.

3. The tin ore recovery method based on segmented open space and segmented filling according to claim 2, characterized in that, The central control device presets a crushing degree E. It compares the acquired crushing degree e of the ore body at the upper part of the roof with the preset crushing degree and then performs a secondary adjustment to the height of the roof. When e≤E1, the central control device determines to lower the height hi of the top plate to hi1, and sets hi1=hi×(1- ); When E1 < e < E2, the central control device does not adjust the height of the top plate; When e≥E2, the central control device determines that the height hi of the top plate should be raised to hi2, and sets hi2=hi×(1+ ); The central control device has a preset crushing degree E, a first preset crushing degree E1, and a second preset crushing degree E2, i=1,2.

4. The tin ore recovery method based on segmented open space and segmented filling according to claim 3, characterized in that, The central control device presets a top plate height H. The central control device compares the acquired top plate height with the preset top plate height and adjusts the power parameters of the lifting power mechanism accordingly. When hij≤H1, the central control device determines to reduce the power parameter G of the lifting power mechanism to G1, and sets G1=G× ; When H1 < hij < H2, the central control device does not adjust the power parameters of the lifting power mechanism; When hij≥H2, the central control device determines to increase the power parameter G of the lifting power mechanism to G1, and sets G1=G× ; The central control device has a preset top plate height H, a first preset top plate height H1, a second preset top plate height H2, and j=1,2.

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