CN112983422A - Ore drawing mining method for inclined layered solid deposit - Google Patents
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Abstract
The invention discloses an ore drawing mining method for inclined layered solid ore deposit, which comprises the steps of arranging a return airway, a transportation lane and a pseudo-depression inclined working face, carrying out advanced pre-splitting blasting, mining by using a mining machine, advancing along the trend of an inclined ore body, carrying out ore falling and conveying to the ground, carrying out sequential frame moving and supporting of ore drawing supports after mining is finished, then carrying out ore drawing and conveying on the ore body at the top layer, and finally treating a mined-out area by using a filling method. The mining process can be promoted along the trend of the ore bed, the arrangement of the working face is simple, the pseudo-oblique angle of the working face is 20-30 degrees, the mining preparation project is simplified, the mining preparation cutting project amount is reduced, the mining efficiency is improved, the roof accidents are reduced, and the problems of large mining preparation workload and low mining rate in the existing non-coal solid ore bed mining technology are solved. The mining method is suitable for the non-coal solid deposit with the inclination angle of 35-65 degrees and the thickness of 5-15 m.
Description
Technical Field
The invention belongs to the technical field of ore deposit mining, and relates to a solid ore deposit mechanized mining method, in particular to an inclined layered solid ore deposit ore drawing mining method.
Background
The non-coal mine is an important component of mineral resources in China, and the mining objects of the non-coal mine are all metal and non-metal mineral deposits except coal, petroleum and natural gas. Mineral resources are non-renewable resources, and the development and protection of the mineral resources are more and more emphasized by the nation, so that enterprises continuously improve the process on the premise of ensuring safety, reduce cost and improve efficiency. At present, the mining mode of non-coal deposit in China is mainly open-pit mining, but with the development of industry and scientific technology, the mineral demand is rapidly increased, the mining depth of the existing mine is increasingly large, and the open-pit mine is also continuously changed into underground mining. For the underground mining process of non-coal solid deposit, the procedures of deposit development, accurate mining of ore blocks, stope face stoping and the like are required. And for non-coal solid deposits with the inclination angle of 35-65 degrees and the thickness of 5-15 m, a caving mining method or a sublevel mining method is adopted for mining, and the two methods have the problems of large mining standard workload, long preparation time, easy damage to the earth surface, large ore loss and dilution of ore pillar, difficult roof management, poor safety, low mechanization degree, high resource loss rate, low productivity and the like, and cannot ensure safe and efficient mining.
Disclosure of Invention
The invention aims to provide an inclined layered solid deposit ore drawing mining method to solve the problems of large mining preparation workload and low mining rate of the existing non-coal solid deposit mining technology.
In order to achieve the purpose, the invention adopts the technical scheme that:
an ore drawing mining method for inclined laminar solid ore deposit comprises the following steps in sequence:
1) working face arrangement
The method comprises the following steps that the position relation of two boundaries of an inclined ore body which is parallel to the trend of the inclined ore body and is close to the ground and far away from the ground is left and right, the relative position relation of the inclined ore body and a goaf is front and back, a return airway is arranged at the left boundary of the inclined ore body along the trend of the inclined ore body, and a transport airway is arranged at the right boundary of the inclined ore body; communicating the return airway and the transportation lane to arrange a pseudo-depression inclined working face with the mining height of 2-4 m;
2) mining of mineral deposits
In the inclined ore body area 10-200 m in front of the pseudo-depression inclined working face, adopting advanced presplitting blasting in the return airway and the transportation lane to treat the inclined ore body;
arranging stoping equipment on the pseudo depression inclined working surface, wherein the stoping equipment comprises an ore drawing support, an ore mining machine, a front end scraper conveyor, a rear end scraper conveyor and an end support;
the plurality of ore drawing supports are sequentially arranged in a lagging and staggered manner from left to right, and the pseudo-depression inclined working face is synchronously supported;
the mining machine mines from a return airway to the transportation lane along the pseudo-depression inclined working face and pushes along the trend of the inclined ore body;
after the mining machine drops along the pseudo-depression inclined working face, automatically loading ores into the front-end scraper conveyor to be conveyed to a conveying roadway, and conveying the ores to the ground through a crusher, a reversed loader and a belt conveyor;
3) support moving protector
Taking the joint of the pseudo-depression-inclination working surface and the return airway as an upper end head, and taking the joint of the pseudo-depression-inclination working surface and the transportation airway as a lower end head, and returning to the pseudo-depression-inclination working surface upper end head after the mining machine finishes mining;
the ore drawing support is propelled along the trend of the inclined ore body, and the sequential frame moving and supporting of the ore drawing support from the return airway to the transportation lane are completed;
the ore drawing support moving frame pushes the front end scraper conveyor;
taking the position relation between the ore drawing support and the front end scraper conveyor as up and down, after the support moving and supporting are completed, the inclined ore body above the ore drawing support is subjected to ore drawing simultaneously in different areas through an ore drawing port of the ore drawing support by utilizing natural collapse or assisting in a loose blasting mode, then is conveyed to a conveying roadway through the rear end scraper conveyor, and is conveyed to the ground through crushing by a crusher, transshipment by a transshipment machine and a belt conveyor;
after ore drawing is finished, the ore drawing support pulls the rear end scraper conveyor;
and (4) treating a goaf formed after mining by using a filling method.
As a limitation, the inclined ore body has an inclination angle of 35-65 degrees and a thickness of 5-15 m.
By way of further limitation, the false oblique angle of the false oblique working face is 20-30 degrees.
As another limitation, the advanced presplitting blasting process is to arrange a plurality of medium-depth drill holes in the inclined ore body at intervals in parallel at an included angle of 65-75 degrees with the return airway or the transportation lane, perform charging and hole sealing in the medium-depth drill holes, and perform blasting.
As a third limitation, the ore drawing support is a four-column shield type hydraulic support and comprises a top beam, a shield beam, a base, a stand column, a telescopic front canopy, a folding side guard, a tail beam and an inserting plate;
the rear end of the base is connected with the shield beam through a front connecting rod and a rear connecting rod; the rear end of the shield beam is movably connected with the tail beam, and the inserting plate is arranged at the other end of the tail beam; the upper surface of the tail beam is also provided with a spraying device; the ore drawing port is arranged on the upper surface of the tail beam; the front end of the shield beam is connected with the top beam; the telescopic forepoling bar is arranged at the front end of the top beam; the other end of the telescopic forepoling bar is also provided with the folding side protection plate; the plurality of upright columns are respectively connected between the upper surface of the base and the lower surface of the top beam; a connecting line between the two upright posts in the left-right direction is parallel to a line at the rear end of the base in the left-right direction;
the top beam, the shield beam, the tail beam and the left end and the right end of the base are respectively and correspondingly provided with two-side bidirectional movable side guard plates.
By way of further limitation, the front end of the top beam is parallel to the false pitch work surface along a line.
As a fourth limitation, the ore drawing is performed by opening ore drawing ports on the ore drawing bracket at intervals from left to right.
As a fifth limitation, the upper end and the lower end of the pseudo-pitching-inclined working surface are respectively provided with an upper end bracket and a lower end bracket correspondingly.
Due to the adoption of the technical scheme, compared with the prior art, the invention has the technical progress that:
the mining method has reasonable design, simple process and convenient construction; the mining process can be promoted along the trend of the ore bed, the arrangement of the working face is simple, the mining preparation engineering is simplified, the mining preparation cutting engineering amount is reduced, and the mining efficiency is further improved;
the working face is arranged along the pseudo-oblique-depression direction, the pseudo-oblique angle is 20-30 degrees, the inclination angle of the working face is effectively reduced, rib stripping and flying gangue damage are avoided, the anti-skid performance of equipment is improved, meanwhile, the top plate is effectively controlled, and compared with a caving mining method and a staged chamber mining method, the top plate accident is effectively reduced;
according to the invention, through carrying out advanced presplitting medium-length hole blasting (namely advanced presplitting blasting treatment) in the return airway and the transportation lane, the hardness of an ore body is reduced, and the crushing of a top ore layer is increased, so that on one hand, the mining difficulty is reduced after the advanced blasting presplitting, and the mining time is shortened, and on the other hand, the application of the medium-length hole (namely drilling hole) improves the production efficiency, effectively reduces the cost investment, realizes high-strength and large-scale centralized mining, is beneficial to the management and control of deep ground pressure, and can provide safer operation conditions for mining personnel;
the mining method can effectively reduce potential safety hazards, and the mining and discharging process of sequentially moving the ore drawing supports and simultaneously drawing ores in different areas on the working face can ensure the uniformity of drawing ores, enhance the stability of the ore drawing supports, overcome the problem that supporting equipment slides down and topples over, reduce the adverse effect on the ore drawing supports in the mining process to the maximum extent, and greatly improve the mining rate of an ore layer;
in conclusion, the mining method is reasonable in design, simple in mining method and convenient to construct, the adopted method for drawing and mining inclined layered solid ore deposit is simple in preparation work and working face arrangement, compared with other mining methods, the mining method is high in production capacity, high in labor productivity, small in loss and dilution, and good in ventilation condition, and can effectively solve the practical problems that the existing method for mining inclined non-coal solid ore deposit is large in preparation workload, long in preparation time, easy to damage the earth surface, large in ore column ore volume loss and dilution, difficult in roof management, poor in safety, low in mechanization degree, high in resource loss rate, low in productivity and the like.
The ore drawing mining method for the inclined layered solid deposit is suitable for the non-coal solid deposit with the inclination angle of 35-65 degrees and the thickness of 5-15 m.
Drawings
FIG. 1 is a schematic process flow diagram of a mining method as described in an embodiment of the invention;
FIG. 2 is a schematic view of a pseudo-dive slope face layout according to an embodiment of the present disclosure, wherein the forward hollow arrows indicate the heading of the ore body;
FIG. 3 is a schematic diagram of the arrangement of pre-split advanced boreholes in an oblique direction in an embodiment of the present invention;
FIG. 4 is a schematic view of the arrangement of advanced pre-split boreholes in a fore-aft direction according to an embodiment of the present invention;
FIG. 5 is a schematic top view of a pseudo-pitch work surface arrangement in an embodiment of the present invention;
FIG. 6 is a schematic cross-sectional view taken at M-M of FIG. 5;
fig. 7 is a schematic perspective view of the ore drawing support according to the embodiment of the present invention;
in the figure: 1. the mining and mining combined type mine comprises an air return roadway, a transportation roadway, a 3 pseudo-pitching inclined working face, a 4 goaf, a 5 inclined ore body, a 6 drawing support, a 61 top beam, a 62 shielding beam, a 63 base, a 64 stand column, a 65 telescopic forepoling beam, a 66 folding type side protection plate, a 67 tail beam, a 68 plug plate, a 69 spraying device, a 7 mining machine, a 8 front end scraper conveyor, a 9 rear end scraper conveyor, a 10 crusher, a 11 reversed loader, a 12 belt conveyor, a 13 upper end support, a 14 lower end support, a 15 middle-depth drilling hole, a 16 advanced support, a 70 pushing rod.
Detailed Description
The present invention is further illustrated by the following specific examples, which are to be construed as merely illustrative, and not limitative of the remainder of the disclosure.
Example a method for drawing and mining inclined laminar solid deposit
The ore drawing and mining method of the inclined laminar solid deposit has the process flow as shown in figure 1, and comprises the following steps which are carried out in sequence:
1) working face arrangement
Selecting an inclined layered non-coal solid ore deposit (the ore body of the Jinning phosphate ore deposit in Kunming city of Yunnan province has better continuity, the average thickness of the ore layer is 13.09 m, the inclination angle is about 50 degrees) with the inclination angle of 35-65 degrees and the thickness of 5-15 m, referring to the graph shown in figure 2 and figure 3, taking the position relation of two boundaries of the inclined ore body 5 which is parallel to the trend of the inclined ore body 5 and is close to the ground and far away from the ground as the left and right, and the relative position relation of the inclined ore body 5 and a goaf 4 as the front and back, excavating and arranging a return airway 1 in the ore layer at the left boundary of the inclined ore body 5, excavating and arranging a transportation airway 2 in the ore layer at the right boundary of the inclined ore body 5, excavating an inclined airway which is communicated with the return airway 1 and the transportation airway 2, and arranging a false inclined working face 3 with the mining height of 2-4 m in the inclined airway, namely, the pseudo-pitching inclined working face 3 is communicated with the return airway 1 and the transportation airway 2; the pseudo-pitching-inclined working face 3 is used as an actual mining working face of the inclined ore body 5, the length of the pseudo-pitching-inclined working face 3 is generally larger than 90m, the degree of pseudo-inclination angle formed by the pseudo-pitching-inclined working face 3 is controlled to be 20-30 degrees, so that the inclination angle of the working face is reduced, the hazards of caving and flying refuse are avoided, and the equipment of the working face is prevented from sliding downwards.
As shown in fig. 2 and 3, the AC connection line is the pseudo-pitching working face 3; the angle ADB (namely angle alpha) is the true inclination angle of the inclined ore body, namely angle ADB =anglealpha =50 degrees; the angle ACB is a pseudo-oblique angle formed by the pseudo-oblique working face 3, namely the angle ACB =25 degrees; the pseudo-dipping face 3 is propelled in a direction of advancement (the direction of mining of the dipping ore body 5) along the direction of the ore body strike (i.e., the direction of the arrow in fig. 2), i.e., in a CD-line direction.
2) Mining of mineral deposits
As shown in fig. 3 and 4, in the area of the inclined ore body 5 10-200 m ahead of the pseudo-pitching working face 3, and respectively forming an angle of 65-75 ° with the return airway 1 and the transportation airway 2, a plurality of middle-deep drill holes 15 are arranged in groups at parallel intervals, that is, a plurality of middle-deep drill holes 15 are arranged in groups forward in parallel with the return airway 1 and the transportation airway 2, the middle-deep drill holes 15 respectively form an angle of 65-75 ° with the return airway 1 or the transportation airway 2 in forward and backward directions (the angle of 70 ° in this embodiment, as shown in fig. 4), and the middle-deep drill holes 15 respectively form an angle of 8-12 ° with the elevation angle of the return airway 1 and the transportation airway 2 in oblique directions (the angle of 10 ° in this embodiment, as shown in fig. 3); the diameter of each of the middle-depth drill holes 15 is generally 75mm, the depth of each of the middle-depth drill holes 15 is 50m, and the distance between the two middle-depth drill holes 15 in the front-back direction is 25 m; and then filling 60mm of mining emulsion explosive into the full drill hole of the medium-depth drill hole 15, sealing holes after filling the explosive, wherein the length of the sealed holes is about 10m, and then performing blasting in groups. The method has the advantages that the structure of the ore layer can be changed by utilizing the advanced presplitting medium-length hole blasting treatment (namely the advanced presplitting blasting treatment), the hardness of the ore body is reduced, the crushing of the top ore layer is increased, the mining difficulty can be effectively reduced during subsequent mining and ore drawing, the mining time is shortened, meanwhile, the production efficiency is improved due to the application of the medium-length hole (namely drilling), the cost investment is reduced, the high-strength and large-scale centralized mining is realized, the management and the control of deep ground pressure are facilitated, and safer operation conditions can be provided for mining personnel.
Arranging stoping equipment on the pseudo depression inclined working surface 3, wherein the stoping equipment comprises an ore drawing support 6, an ore mining machine 7, a front end scraper conveyor 8, a rear end scraper conveyor 9, an upper end head support 13 and a lower end head support 14;
the ore drawing support 6 is a double-conveyor plug-in plate type four-column shield hydraulic support and comprises a top beam 61, a shield beam 62, a base 63, a stand column 64, a telescopic forepoling beam 65, a folding side protection plate 66, a tail beam 67 and a plug board 68 which are of a main narrow beam structure;
taking the position relationship between the ore drawing support 6 and the front end scraper conveyor 8 as up and down, the rear end of the base 63 is provided with a fixed diagonal jack, and the rear end of the base 63 is connected with the shield beam 62 through a front connecting rod and a rear connecting rod; the rear end of the shield beam 62 is movably connected with the tail beam 67, the tail beam 67 can swing up and down, and the other end of the tail beam 67 is provided with a telescopic inserting plate 68; the upper surface of the tail beam 67 is also provided with a spraying device 69, and the spraying device 69 can swing and link with the tail beam 67 or be operated manually to perform dust fall on the rear end scraper conveyor 9; the ore drawing port is arranged on the upper surface of the tail beam 67; the front end of the shield beam 62 is connected with the top beam 61; the telescopic forepoling bar 65 is arranged at the front end of the top beam 61; the other end of the telescopic forepoling bar 65 is also provided with the folding side protection plate 66 which can control the top and the side protection in time; the upright posts 64 are connected between the upper surface of the base 63 and the lower surface of the top beam 61, and generally, a mining support 6 has a front upright post 64 and a rear upright post 64, and the distance between the front upright post 64 and the rear upright post 64 is large, so that people can pass through the mining support 6, the mining support 6 can be cleaned, and the rear scraper conveyor 9 can be conveniently processed; the ore drawing supports 6 are used for synchronously supporting the pseudo-dive-inclined working face 3, and a plurality of ore drawing supports 6 are sequentially arranged in a lagging and staggered mode from left to right in a left-part area, a middle-part area and a right-part area, wherein the left-part area is 1/4 of the total length of the pseudo-dive-inclined working face 3, the middle-part area is 1/2 of the total length of the pseudo-dive-inclined working face 3, and the right-part area is 1/4 of the total length of the pseudo-dive-inclined working face 3; the connecting line between the two upright posts 64 in the left-right direction is parallel to the line of the rear end of the base 63 in the left-right direction; the distance between the two upright columns 64 in the left and right directions is small, so that the ore drawing bracket 6 is prevented from toppling;
the left end and the right end of the top beam 61, the shield beam 62, the tail beam 67 and the base 63 are respectively and correspondingly provided with a bilateral two-way movable side guard plate, and are controlled by a side pushing jack so as to keep the mutual stability among the supports.
The working resistance of the ore drawing support 6 is about 6000kN, the ore drawing support has good adaptability, and the top beam 61 is high in sealing property, support adjusting capacity, anti-falling and anti-skidding capacity.
The front end scraper conveyer 8 and the rear end scraper conveyer 9 are respectively arranged at the front side and the rear side of the base 63 of the ore drawing support 6, and the front end scraper conveyer 8 and the rear end scraper conveyer 9 are both parallel to the pseudo-depression inclined working surface 3; the front end scraper conveyor 8 and the rear end scraper conveyor 9 both adopt quasi-edge double-chain scraper conveyors, the power is more than 1000kW, and double chains, scrapers and chutes of the front end scraper conveyor and the rear end scraper conveyor form a net layout together, so that people can be prevented from being injured and accumulated by ores, and the safety of the front end scraper conveyor and the rear end scraper conveyor is higher;
the front-end scraper conveyor 8 is connected with the pushing rod 70 on the ore drawing support 6 through a connecting piece by adopting a reinforced single lug, so that the ore drawing support 6 and the front-end scraper conveyor 8 form an anti-skid system to enhance the integral anti-skid effect;
the rear end scraper conveyor 9 is connected with the fixed diagonal jack on the base 63 of the ore drawing support 6 by using the anchor chain and the chute of the rear end scraper conveyor 9, and the rear end scraper conveyor 9 can be pulled and moved while the anti-skidding effect is achieved.
The bottom plates of the front end scraper conveyor 8 and the rear end scraper conveyor 9 are provided with windows to prevent the bottom plates of the front end scraper conveyor 8 and the rear end scraper conveyor 9 from being adhered to the inclined non-coal solid deposit.
The mining machine 7 is an electrically driven double-drum mining machine which cuts ores by using high-strength alloy head cutting teeth; the mining machine 7 is also provided with a mechanical antiskid device, and a gear-pin rail type chainless traction is adopted, so that the chute of the mining machine 7 is prevented from being damaged, and the maintenance workload is reduced;
the mining machine 7 mines (downwards mines) from the return airway 1 to the transportation lane 2 along the pseudo-depression inclined working face 3 and pushes along the trend of the inclined ore body 5; during mining, the mining machine 7 cuts ore along the front end scraper conveyor 8 in an orbital motion, and the drum cutting teeth directly cut and mine the ore in an impacting/gnawing manner; when the mining machine 7 carries out downward mining, the energy of a traction generator is fed back to a power grid through a frequency converter, so that a continuously stable braking torque is generated to realize reliable braking of the mining machine 7; the whole mining machine 7 adopts remote control operation in the mining process, and an operator can adjust the mining speed according to the field condition;
after the mining machine 7 simultaneously drops ores in different areas along the pseudo-depression inclined working face 3, the ores are automatically loaded into the front-end scraper conveyor 8 and conveyed to the conveying roadway 1, and are crushed by a crusher 10, transshipped by a transloader 11 and conveyed to the ground by a belt conveyor 12;
3) support moving protector
Taking the joint of the pseudo-pitching-inclined working face 3 and the return airway 1 as an upper end head, and the joint of the pseudo-pitching-inclined working face 3 and the transport airway 2 as a lower end head, wherein an upper end head support 13 and a lower end head support 14 are respectively and correspondingly arranged on the upper end head and the lower end head of the pseudo-pitching-inclined working face 3; when the mining machine 7 is used for mining, obliquely cutting feed from 15m of the upper end of the pseudo-depression-inclination working surface 3, cutting ores from top to bottom, immediately extending out of the telescopic front canopy 65 of the ore drawing bracket 6 after cutting the ores, supporting a newly exposed top ore layer, adjusting the running direction of the mining machine 7 after reaching the lower end (namely after the mining machine 7 finishes mining), and ascending a cleaning machine path (namely returning to the upper end of the pseudo-depression-inclination working surface 3);
the ore drawing support 6 is propelled along the direction of the inclined ore body 5, generally, a rack moving worker follows and lags the upward movement of the mining machine 7 from the lower end to the upper end to sequentially move the rack, namely, the sequential rack moving and supporting of the ore drawing support 6 from the transportation lane 2 to the return airway 1 are completed; the step pitch of the moving frame is 0.6m, and the ore drawing support 6 lags behind the rear roller of the mining machine 7 by 3-5 m; meanwhile, the front end scraper conveyor 8 is sequentially pushed from bottom to top by the pseudo depression inclined working face 3 after 15m of frame moving working procedure, the pushing step distance is 0.6m, and the length of the bent section of the front end scraper conveyor 8 is more than 15 m;
after the frame moving and supporting are completed, the inclined ore body 5 above the ore drawing support 6 is processed by adopting an advanced presplitting medium-length hole blasting technology (namely, a loosening blasting mode is assisted, the method is the same as the advanced presplitting blasting processing mode), the inclined ore body is broken and falls under the action of mine pressure, ore drawing ports on the ore drawing support 6 are opened at intervals from left to right by adopting single wheels (the ore drawing port of the ore drawing support is opened every interval of one ore drawing support), and ore drawing is simultaneously carried out in different areas (according to the left, middle and right partial areas); during ore drawing, the tail beam 67 of the ore drawing support 6 can swing up and down, the inserting plate 68 on the tail beam 67 can stretch out and draw back, the swinging of the tail beam 67 and the stretching and drawing of the inserting plate 68 are utilized to crush larger ores and block gangue at an ore drawing port, so that ore drawing is facilitated, the ores falling from the ore drawing port are conveyed to the conveying roadway 2 through the rear-end scraper conveyor 9, and are crushed through the crusher 10, transferred through the transfer conveyor 11 and conveyed to the ground through the belt conveyor 12;
after ore drawing is finished, the ore drawing support 6 pulls the rear end scraper conveyor 9, the length of the rear end scraper conveyor 9 pulled once is more than 15m, the pulling step distance is 1.2m, and after the rear end scraper conveyor 9 is pulled, the rear end scraper conveyor is still parallel to the pseudo-depression inclined working surface 3;
processing a goaf formed after mining by using a filling method; the filling method is characterized in that waste rock-full tailings filling slurry is prepared, and the filling slurry is continuously conveyed to a filling stope by using an industrial pump for filling, so that the in-situ utilization of mining and selecting wastes (waste rock and full tailings) is realized.
And repeating the steps 2) -3) to carry out circular mining.
It should be noted that the above-mentioned embodiments are only preferred embodiments of the present invention, and not intended to limit the present invention in other forms, and any person skilled in the art may use the above-mentioned technical content as a teaching to make changes or modifications to the equivalent embodiments with equivalent changes, but all those simple changes, equivalent changes and modifications made to the above-mentioned embodiments do not depart from the technical spirit of the present invention, and still all those embodiments are within the scope of the present invention as claimed.
Claims (8)
1. The ore drawing and mining method for the inclined layered solid deposit is characterized by comprising the following steps in sequence:
1) working face arrangement
The method comprises the following steps that the position relation of two boundaries of an inclined ore body which is parallel to the trend of the inclined ore body and is close to the ground and far away from the ground is left and right, the relative position relation of the inclined ore body and a goaf is front and back, a return airway is arranged at the left boundary of the inclined ore body along the trend of the inclined ore body, and a transport airway is arranged at the right boundary of the inclined ore body; communicating the return airway and the transportation lane to arrange a pseudo-depression inclined working face with the mining height of 2-4 m;
2) mining of mineral deposits
In the inclined ore body area 10-200 m in front of the pseudo-depression inclined working face, adopting advanced presplitting blasting in the return airway and the transportation lane to treat the inclined ore body;
arranging stoping equipment on the pseudo depression inclined working surface, wherein the stoping equipment comprises an ore drawing support, an ore mining machine, a front end scraper conveyor, a rear end scraper conveyor and an end support;
the plurality of ore drawing supports are sequentially arranged in a lagging and staggered manner from left to right, and the pseudo-depression inclined working face is synchronously supported;
the mining machine mines from a return airway to the transportation lane along the pseudo-depression inclined working face and pushes along the trend of the inclined ore body;
after the mining machine drops along the pseudo-depression inclined working face, automatically loading ores into the front-end scraper conveyor to be conveyed to a conveying roadway, and conveying the ores to the ground through a crusher, a reversed loader and a belt conveyor;
3) support moving protector
Taking the joint of the pseudo-depression-inclination working surface and the return airway as an upper end head, and taking the joint of the pseudo-depression-inclination working surface and the transportation airway as a lower end head, and returning to the pseudo-depression-inclination working surface upper end head after the mining machine finishes mining;
the ore drawing support is propelled along the trend of the inclined ore body, and the sequential frame moving and supporting of the ore drawing support from the return airway to the transportation lane are completed;
the ore drawing support moving frame pushes the front end scraper conveyor;
taking the position relation between the ore drawing support and the front end scraper conveyor as up and down, after the support moving and supporting are completed, the inclined ore body above the ore drawing support is subjected to ore drawing simultaneously in different areas through an ore drawing port of the ore drawing support by utilizing natural collapse or assisting in a loose blasting mode, then is conveyed to a conveying roadway through the rear end scraper conveyor, and is conveyed to the ground through crushing by a crusher, transshipment by a transshipment machine and a belt conveyor;
after ore drawing is finished, the ore drawing support pulls the rear end scraper conveyor;
and (4) treating a goaf formed after mining by using a filling method.
2. The ore drawing mining method for the inclined layered solid deposit according to claim 1, wherein the inclined ore body has an inclination angle of 35-65 degrees and a thickness of 5-15 m.
3. The method for ore drawing of a sloping layered solid deposit according to claim 2, wherein the pseudo-cant angle of the pseudo-cant working face is 20-30 °.
4. The inclined layered solid deposit ore drawing mining method according to any one of claims 1 to 3, wherein the advanced presplitting blasting is carried out by arranging a plurality of drill holes in the inclined ore body at an included angle of 65-75 degrees with the air return roadway or the transportation roadway respectively in parallel at intervals, sealing the drill holes with charges, and blasting.
5. The method for the ore drawing of the inclined layered solid deposit according to any one of claims 1 to 3, wherein the ore drawing support is a four-column shield type hydraulic support comprising a top beam, a shield beam, a base, a column, a front canopy, a side wall, a tail beam and an insertion plate;
the rear end of the base is connected with the shield beam through a front connecting rod and a rear connecting rod; the rear end of the shield beam is movably connected with the tail beam, and the inserting plate is arranged at the other end of the tail beam; the upper surface of the tail beam is also provided with a spraying device; the ore drawing port is arranged on the upper surface of the tail beam; the front end of the shield beam is connected with the top beam; the front cantilever is arranged at the front end of the top beam; the other end of the telescopic front cantilever is also provided with the side protection plate; the plurality of upright columns are respectively connected between the upper surface of the base and the lower surface of the top beam; a connecting line between the two upright posts in the left-right direction is parallel to a line at the rear end of the base in the left-right direction;
the top beam, the shield beam, the tail beam and the left end and the right end of the base are respectively and correspondingly provided with two-side bidirectional movable side guard plates.
6. The method for ore drawing of a sloping layered solid deposit according to claim 5, wherein the front end of the roof beam is parallel to the pseudo-downwardly sloping working surface along a line.
7. The method for mining inclined layered solid deposit, according to any one of claims 1 to 3 and 6, characterized in that the ore drawing is performed by opening ore drawing ports on the ore drawing brackets at intervals from left to right.
8. The method for the ore drawing of the inclined layered solid deposit according to any one of claims 1 to 3 and 6, wherein the upper end and the lower end of the pseudo-dive inclined working face are respectively provided with an upper end bracket and a lower end bracket.
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