CN112627823A - Mine underground raw ore pre-throwing waste system and mine mining system - Google Patents
Mine underground raw ore pre-throwing waste system and mine mining system Download PDFInfo
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- CN112627823A CN112627823A CN202011446619.7A CN202011446619A CN112627823A CN 112627823 A CN112627823 A CN 112627823A CN 202011446619 A CN202011446619 A CN 202011446619A CN 112627823 A CN112627823 A CN 112627823A
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- 238000005065 mining Methods 0.000 title claims abstract description 39
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- 238000003860 storage Methods 0.000 claims abstract description 35
- 230000007306 turnover Effects 0.000 claims description 81
- 239000010878 waste rock Substances 0.000 claims description 59
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- E—FIXED CONSTRUCTIONS
- E21—EARTH OR ROCK DRILLING; MINING
- E21C—MINING OR QUARRYING
- E21C41/00—Methods of underground or surface mining; Layouts therefor
- E21C41/16—Methods of underground mining; Layouts therefor
- E21C41/22—Methods of underground mining; Layouts therefor for ores, e.g. mining placers
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B07—SEPARATING SOLIDS FROM SOLIDS; SORTING
- B07B—SEPARATING SOLIDS FROM SOLIDS BY SIEVING, SCREENING, SIFTING OR BY USING GAS CURRENTS; SEPARATING BY OTHER DRY METHODS APPLICABLE TO BULK MATERIAL, e.g. LOOSE ARTICLES FIT TO BE HANDLED LIKE BULK MATERIAL
- B07B1/00—Sieving, screening, sifting, or sorting solid materials using networks, gratings, grids, or the like
- B07B1/28—Moving screens not otherwise provided for, e.g. swinging, reciprocating, rocking, tilting or wobbling screens
- B07B1/288—Tumbling screens
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B07—SEPARATING SOLIDS FROM SOLIDS; SORTING
- B07B—SEPARATING SOLIDS FROM SOLIDS BY SIEVING, SCREENING, SIFTING OR BY USING GAS CURRENTS; SEPARATING BY OTHER DRY METHODS APPLICABLE TO BULK MATERIAL, e.g. LOOSE ARTICLES FIT TO BE HANDLED LIKE BULK MATERIAL
- B07B1/00—Sieving, screening, sifting, or sorting solid materials using networks, gratings, grids, or the like
- B07B1/46—Constructional details of screens in general; Cleaning or heating of screens
- B07B1/4609—Constructional details of screens in general; Cleaning or heating of screens constructional details of screening surfaces or meshes
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B07—SEPARATING SOLIDS FROM SOLIDS; SORTING
- B07B—SEPARATING SOLIDS FROM SOLIDS BY SIEVING, SCREENING, SIFTING OR BY USING GAS CURRENTS; SEPARATING BY OTHER DRY METHODS APPLICABLE TO BULK MATERIAL, e.g. LOOSE ARTICLES FIT TO BE HANDLED LIKE BULK MATERIAL
- B07B9/00—Combinations of apparatus for screening or sifting or for separating solids from solids using gas currents; General arrangement of plant, e.g. flow sheets
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- E—FIXED CONSTRUCTIONS
- E21—EARTH OR ROCK DRILLING; MINING
- E21F—SAFETY DEVICES, TRANSPORT, FILLING-UP, RESCUE, VENTILATION, OR DRAINING IN OR OF MINES OR TUNNELS
- E21F13/00—Transport specially adapted to underground conditions
- E21F13/04—Transport of mined material in gravity inclines; in staple or inclined shafts
- E21F13/045—Bunkers specially adapted for mining purposes
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- E—FIXED CONSTRUCTIONS
- E21—EARTH OR ROCK DRILLING; MINING
- E21F—SAFETY DEVICES, TRANSPORT, FILLING-UP, RESCUE, VENTILATION, OR DRAINING IN OR OF MINES OR TUNNELS
- E21F15/00—Methods or devices for placing filling-up materials in underground workings
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- Life Sciences & Earth Sciences (AREA)
- Geochemistry & Mineralogy (AREA)
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- Mechanical Engineering (AREA)
- Environmental & Geological Engineering (AREA)
- Remote Sensing (AREA)
- Combined Means For Separation Of Solids (AREA)
Abstract
The invention discloses a mine underground raw ore pre-waste-throwing system and a mine mining system. The raw ore pre-waste-throwing system comprises an ore dressing device and the like, wherein the ore dressing device is arranged above a raw ore storage bin and comprises a pickpocket inclined screen and an automatic overturning screen which are arranged end to end, the pickpocket inclined screen is arranged in an inclined mode, the upper end of the pickpocket inclined screen corresponds to the discharge end of the automatic ore-pouring device, the automatic overturning screen is located below the pickpocket inclined screen, the distance between the sieve bars of the automatic overturning screen is smaller than that between the pickpocket inclined screens, the front end of the automatic overturning screen is provided with a connecting piece matched with an electric hoist, the tail end of the automatic overturning screen is movably connected with a bottom beam, and the automatic overturning screen is controlled by the electric hoist to overturn and fall back towards a waste stone bin from a horizontal position around. By adopting the system, part of barren rocks can be pre-thrown in advance in the underground, the grade of the extracted rock raw ore is improved, the ore dressing principle that the barren rocks can be thrown and early-thrown is realized in the underground, the production cost of an ore dressing plant, the extracted rock quantity of the barren rocks and the lifting pressure of a vertical shaft are effectively reduced, the backfill treatment of an underground mined-out area can be solved, and the mechanization level of the mine is improved.
Description
Technical Field
The invention belongs to the technical field of mining machinery, and particularly relates to a mine underground raw ore pre-waste-throwing system and a mine mining system.
Background
When underground mining of a mine, a footrill, a blind shaft and a blind inclined shaft are jointly developed, and mining is carried out by a shallow hole shrinkage method. With the continuous increase of mining depth along with the scale mining for many years, development, production prospecting, mining preparation cutting and mining are mostly concentrated in the deep part, which causes the tension of promotion and the increase of transportation cost, and especially the original transportation promotion capability of old mines seriously restricts the production development requirement; meanwhile, the pulse amplitude of deep ore veins becomes small, the ore grade is reduced, and the grade of the protruding raw ore needs to be improved by pre-polishing waste in the underground.
Disclosure of Invention
The present invention is directed to solving, at least to some extent, one of the technical problems in the related art. Therefore, the invention aims to provide a mine underground raw ore pre-throwing waste system and a mine mining system. The raw ore pre-throwing waste system is adopted to treat raw ore, so that a part of waste rock can be pre-thrown in advance underground, and the ore dressing principle that the waste rock can be thrown and early thrown is realized underground, so that the grade of the extracted raw ore can be improved, the extracted waste rock amount is reduced, the lifting pressure of a vertical shaft is relieved, the backfill treatment of an underground goaf is solved, the production cost of a dressing plant is reduced, the mechanical level of a mine can be improved, the mining cost and the labor intensity are reduced, and the raw ore pre-throwing waste system has better social and economic values.
According to one aspect of the invention, the invention provides a mine underground raw ore pre-waste-throwing system. According to an embodiment of the invention, the system comprises: automatic device, ore dressing device, former ore storage storehouse and barren rock storehouse of falling of former ore, wherein:
the ore dressing device is established raw ore warehouse top just is located the automatic ore device below that falls of raw ore, the barren rock storehouse is established the ore dressing device tail end, the ore dressing device includes the raking bar inclined screen and the automatic sieve that turns over that arrange from beginning to end:
the inclined raking fence sieve is obliquely arranged, the upper end of the inclined raking fence sieve corresponds to the discharge end of the automatic crude ore dumping device, and the inclined raking fence sieve comprises a plurality of first sieve bars which are arranged at intervals along the width direction of the inclined raking fence sieve;
automatic sieve that turns over is located it establishes to take off fence inclined screen below and its front end take off the tail end of fence inclined screen, automatic sieve that turns over includes many side by side and interval arrangement's second grating, arbitrary adjacent two the interval of second grating is less than arbitrary adjacent two the interval of first grating, automatic sieve front end that turns over is equipped with connecting piece, tail end and floorbar swing joint with electric block matching, automatic sieve that turns over is suitable for realize from horizontal position towards the upset in waste rock storehouse and fall back around its coupling assembling with the floorbar under electric block's the control.
According to the mine underground raw ore pre-waste-throwing system provided by the embodiment of the invention, raw ores transported by a mine car can be automatically poured onto the screen surface of the inclined screen of the raking fence by using the automatic ore-pouring device to carry out waste-throwing treatment, so that the raw ores with small particle sizes directly enter the raw ore storage bin through the gaps of the first screen bars, large waste stones and ores slide into the automatic turning screen platform below through the inclined screen surface, the large ores are further picked into the raw ore storage bin through manual sorting, and the rest waste stones are controlled to turn over towards the waste stone bin by the electric hoist, so that the large waste stones enter the waste stone bin, wherein the automatic turning screen is horizontally arranged in the manual sorting process, and the turning over from the horizontal position towards the waste stone bin is realized through the electric hoist control during waste stone pouring. In conclusion, the system is simple in structure, when the system is used for processing raw ores, a part of barren rocks can be pre-thrown in advance underground, the grade of the protruding hole raw ores is improved, and the ore dressing principle that the barren rocks can be thrown in advance is realized underground, so that the grade of the protruding hole raw ores can be improved, the protruding hole quantity of the barren rocks is reduced, the lifting pressure of a vertical shaft is relieved, the pre-thrown barren rocks can be backfilled in a goaf in time, the backfilling management of the underground goaf is solved, the production cost of an ore dressing plant is reduced, the mechanization level of a mine can be improved, the mining cost and the manual labor intensity are reduced, and the system has good social and economic values.
In addition, the mine underground raw ore pre-waste-throwing system according to the embodiment of the invention can also have the following additional technical characteristics:
in some embodiments of the invention, at least one of the following conditions is satisfied: a strip-shaped sieve pore is formed between every two adjacent first sieve bars, and the cross section of the sieve pore is of a structure with a narrow top and a wide bottom; the cross section of each first screen bar is of an inverted trapezoid structure independently.
In some embodiments of the invention, at least one of the following conditions is satisfied: each first screen bar is made of trapezoidal steel with a large face facing upwards; each first sieve bar is detachably fixed on the inclined sieve of the pickoff fence; the distance between two adjacent first screen bars is adjustable.
In some embodiments of the invention, the inclined angle of the pickoff fence inclined screen is 28-36 degrees, and the distance between two adjacent first screen bars is 12-18 cm.
In some embodiments of the invention, at least one of the following conditions is satisfied: a strip-shaped sieve pore is formed between every two adjacent second sieve bars, and the cross section of the sieve pore is of a structure with a narrow top and a wide bottom; the cross section of each second screen bar is of an inverted trapezoidal structure independently; the cross section of each second screen bar is of an I-shaped structure independently; each second screen bar is independently an I-shaped steel with a large face upwards; the distance between the front end of the automatic overturning sieve and the tail end of the raking fence inclined sieve is not more than 5 cm.
In some embodiments of the invention, at least one of the following conditions is satisfied: each second screen bar is respectively and independently fixedly connected to the automatic turnover screen; the connecting component of the automatic sieve turnover and the bottom beam is a hinge; the automatic turnover screen is arranged below the automatic turnover screen through the connecting assembly of the automatic turnover screen and the bottom beam, and the tail end of the automatic turnover screen extends to the length outside the connecting assembly and is smaller than the height above the bottom beam through the connecting assembly.
In some embodiments of the invention, the distance between two adjacent second screen bars is 5-14 cm.
In some embodiments of the invention, a concrete partition wall is arranged between the raw ore storage bin and the waste rock bin, and the concrete partition wall is also used as the bottom beam.
In some embodiments of the invention, the ore dressing device comprises at least one pickoff fence inclined screen and at least two automatic overturning screens arranged side by side, each automatic overturning screen is independently provided with a connecting piece matched with the electric hoist and is movably connected with the bottom beam.
According to a second aspect of the invention, a mine mining system is provided. According to the embodiment of the invention, the system comprises the mine underground raw ore pre-waste-throwing system. The mine mining system comprises a plurality of subsystems, such as a mining subsystem, a mineral separation subsystem, an ore removal subsystem, a ventilation subsystem and the like, and the mine mining system can improve the grade of the extracted ore, reduce the extracted rock amount, relieve the lifting pressure of a vertical shaft, and timely backfill the extracted area of the pre-removed ore by adopting the underground mine raw ore pre-removing waste system to replace the existing mineral separation subsystem, so that the production cost of a concentrating mill is reduced, the mechanization level of the mine can be improved, the extraction cost and the labor intensity are reduced, and the mine mining system has better social and economic values.
Additional aspects and advantages of the invention will be set forth in part in the description which follows and, in part, will be obvious from the description, or may be learned by practice of the invention.
Drawings
The above and/or additional aspects and advantages of the present invention will become apparent and readily appreciated from the following description of the embodiments, taken in conjunction with the accompanying drawings of which:
fig. 1 is a schematic structural diagram of a mine underground raw ore pre-dumping system according to one embodiment of the invention.
Fig. 2 is a schematic structural diagram of a mine underground raw ore pre-dumping system according to an embodiment of the invention, which is seen from top to bottom.
Fig. 3 is a schematic view of the bar and mesh distribution of a pickoff fence inclined screen according to an embodiment of the invention.
Fig. 4 is a schematic structural view of a pickpocket fence inclined screen and an automatic turnover screen according to one embodiment of the invention.
Fig. 5 is a schematic structural view of a support beam for fixedly supporting a picket fence inclined screen and an automatic turnover screen according to an embodiment of the present invention.
Fig. 6 is a schematic structural diagram of a gravel bin and a slant well lifting device of the pickoff fence inclined screen according to one embodiment of the invention.
Fig. 7 is a schematic diagram of the structure of a mine underground raw ore pre-dumping system adopted in embodiment 1 of the invention.
Detailed Description
Reference will now be made in detail to embodiments of the present invention, examples of which are illustrated in the accompanying drawings, wherein like or similar reference numerals refer to the same or similar elements or elements having the same or similar function throughout. The embodiments described below with reference to the drawings are illustrative and intended to be illustrative of the invention and are not to be construed as limiting the invention.
In the description of the present invention, it is to be understood that the terms "upper", "lower", "front", "rear", "horizontal", "bottom", "inner", and the like, indicate orientations and positional relationships based on the orientations and positional relationships shown in the drawings, are used for convenience in describing the present invention and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and thus, should not be construed as limiting the present invention. Furthermore, the terms "first", "second" and "first" are used for descriptive purposes only and are not to be construed as indicating or implying relative importance or implicitly indicating the number of technical features indicated. Thus, a feature defined as "first" or "second" may explicitly or implicitly include at least one such feature. In the description of the present invention, "a plurality" means at least two, e.g., two, three, etc., unless specifically limited otherwise.
In the present invention, unless otherwise expressly stated or limited, the terms "mounted," "connected," "secured," and the like are to be construed broadly and can, for example, be fixedly connected, detachably connected, or integrally formed; can be mechanically or electrically connected; they may be directly connected or indirectly connected through intervening media, or they may be connected internally or in any other suitable relationship, unless expressly stated otherwise. The specific meanings of the above terms in the present invention can be understood by those skilled in the art according to specific situations. In addition, in the present invention, unless otherwise explicitly specified or limited, a first feature "on" or "under" a second feature may be directly contacted with the first and second features, or indirectly contacted with the first and second features through an intermediate. Also, a first feature "on," "over," and "above" a second feature may be directly or diagonally above the second feature, or may simply indicate that the first feature is at a higher level than the second feature. A first feature being "under," "below," and "beneath" a second feature may be directly under or obliquely under the first feature, or may simply mean that the first feature is at a lesser elevation than the second feature.
According to one aspect of the invention, the invention provides a mine underground raw ore pre-waste-throwing system. According to an embodiment of the invention, referring to fig. 1-2, the system comprises: automatic device 100, the ore dressing device 200, the raw ore storage bin 300 and the barren rock storehouse 400 of falling of raw ore, wherein: mineral processing device 200 establishes in former ore storage bin 300 top and is located the automatic ore device 100 below that falls of former ore, and barren rock storehouse 400 is established at mineral processing device 200 tail end, and mineral processing device 200 includes the raking fence inclined screen 210 and the automatic sieve 220 that turns over that the head and the tail arranged: the pickpocket fence inclined screen 210 is obliquely arranged, the upper end of the pickpocket fence inclined screen 210 corresponds to the discharge end of the raw ore automatic ore pouring device 100, and the pickpocket fence inclined screen 210 comprises a plurality of first screen bars 211 which are arranged at intervals along the width direction of the pickpocket fence inclined screen 210; the automatic overturning sieve 220 is located below the pickpocket inclined sieve 210, the front end of the automatic overturning sieve 220 is arranged at the tail end of the pickpocket inclined sieve 210, the automatic overturning sieve 220 comprises a plurality of second sieve bars 221 which are arranged side by side at intervals, the second sieve bars 221 are preferably arranged along the width direction of the automatic overturning sieve, the distance between any two adjacent second sieve bars 221 is smaller than that between any two adjacent first sieve bars 211, the front end of the automatic overturning sieve 220 is provided with a connecting piece 222 matched with an electric hoist 224, and the tail end of the automatic overturning sieve is movably connected with a bottom beam, and the automatic overturning sieve 220 is suitable for realizing overturning and falling from a horizontal position towards the waste stone bin 400 around a connecting piece 223 between the automatic overturning sieve and the bottom beam under the control of the electric hoist. It should be noted that the pitch of the screen bars in the present invention refers to the shortest distance between two adjacent screen bars.
According to the embodiment of the invention, the underground mine raw ore pre-waste-throwing system can utilize an automatic ore-pouring device to automatically pour raw ores conveyed by a mine car into the screen surface of a raking fence inclined screen for waste-throwing treatment, so that the raw ores with small particle sizes directly enter a raw ore storage bin through first screen strip gaps, large waste stones and ores slide into an automatic turning screen platform below through the inclined screen surface, the large ores are further picked into the raw ore storage bin through manual sorting, and the rest waste stones are controlled to turn over towards the waste stone bin through an electric hoist, so that the large waste stones enter the waste stone bin, wherein the automatic turning screen is horizontally arranged in the manual sorting process, and the turning from the horizontal position towards the waste stone bin is realized through the electric hoist control during waste stone pouring. In conclusion, the system is simple in structure, and when the system is used for processing the raw ore, the grade of the protruding-hole raw ore can be improved, the protruding-hole amount of the waste rock is reduced, the lifting pressure of the vertical shaft is relieved, the pre-cast waste rock can be backfilled into the goaf in time, the backfill management of the underground goaf is solved, the production cost of an enterprise is reduced, the mechanization level of the mine can be improved, the labor intensity of operating personnel is reduced, and the system has good social and economic values.
The mine underground raw ore pre-waste-throwing system according to the embodiment of the invention is described in detail with reference to fig. 1 to 6.
Raking fence inclined screen 210
According to the embodiment of the invention, the raking fence inclined screen is suitable for primary separation of raw ores, so that the raw ores with small particle sizes directly enter the raw ore storage bin through the gaps of the first screen bars.
According to an embodiment of the present invention, referring to fig. 2 to 4, a strip-shaped screen hole may be formed between two adjacent first screen bars 211 in the pickoff fence inclined screen 210, and the screen hole cross section 212 may be a structure with a narrow top and a wide bottom, and the inventors found that by forming the strip-shaped screen hole, not only the inclined screen structure may be simplified, but also smooth separation of small-particle-size raw ores and large ores is facilitated; in addition, the cross section of each sieve pore is narrow at the top and wide at the bottom, so that small-particle-size raw ores falling through the inclined sieve can more smoothly fall into the raw ore storage bin, and the problem that the small-particle-size raw ores are blocked in the sieve pores due to uneven particle sizes to block the inclined sieve in the fence, so that the screening efficiency and the screening effect are influenced is avoided.
According to another embodiment of the present invention, referring to fig. 3, the cross section of each first screen bar 211 in the pickoff fence inclined screen 210 can be respectively and independently an inverted trapezoid structure, so as to ensure that the cross section of the formed screen holes is a structure with a narrow top and a wide bottom, and the aperture of the screen holes can be gradually increased along the direction toward the raw ore storage bin, thereby facilitating the raw ore with small particle size to smoothly fall into the raw ore storage bin, and avoiding the problem that the screen holes of the inclined screen are blocked by the raw ore with small particle size. Further, the first screen bars 211 can be steel screen bars, so that the strength and the service life of the pickoff fence inclined screen can be further improved. More preferably, each first screen band 211 can be independently a large-face-up trapezoidal steel, namely the long bottom of the trapezoidal steel faces upwards, the inventor finds that the raw ore rolls on the inclined screen of the pickpocket fence through the automatic ore dumping device and then continues to roll on the inclined screen of the pickpocket fence until the raw ore slides to the automatic screen overturning platform, during which the ore rolls and the raw ore with small grain size drops to the raw ore storage bin, the sieve bars are greatly abraded, excessive abrasion of the screen bars can also cause the spacing between the screen bars to be enlarged, reduce the screening effect of the raking fence inclined screen, cause the pre-throwing rate of waste rocks to be reduced, reduce the grade of the protruding raw ore, the wear resistance and the service life of the pickoff fence inclined screen can be obviously improved by adopting the bar-shaped steel with the trapezoidal cross section as the first screen bar, thereby greatly reducing the probability of the reduction of the grade of the outlet raw ore and the reduction of the waste rock pre-throwing rate caused by the abrasion of the screen bars and the frequency of replacing the screen bars.
According to another embodiment of the present invention, each first bar 211 in the pickoff fence inclined screen 210 can be detachably fixed on the pickoff fence inclined screen, so that the bar can be replaced or detached more conveniently, and the damaged bar can be replaced at any time or the problem of screen hole blockage can be solved.
According to another embodiment of the present invention, the pitch L between two adjacent first bars 211 in the pickoff fence inclined screen 2101The utility model can be adjusted in a controllable way,the inventor finds that the screen hole diameter of the raking fence inclined screen directly influences the grade of raw ore and the manual sorting difficulty of a subsequent automatic overturning screen platform, and the screen hole diameter of the inclined screen can be flexibly regulated and controlled according to actual ore dressing requirements, such as the whole particle size distribution of the raw ore, the grade requirement for obtaining the raw ore and the like by independently regulating the screen bar spacing of the raking fence inclined screen, so that the effects of obtaining the raw ore with higher grade and remarkably reducing the manual sorting difficulty are achieved.
According to another embodiment of the present invention, the inclined angle of the pickoff fence inclined screen 210 may be 28 to 36 degrees, for example, 28 degrees, 29 degrees, 30 degrees, 31 degrees, 32 degrees, 33 degrees, 34 degrees, 35 degrees or 36 degrees, and the interval L between two adjacent first screen bars 211 is equal to or less than 36 degrees1The thickness of the inclined sieve can be 12-18 cm, for example, 12cm, 13cm, 14cm, 15cm, 16cm, 17cm or 18cm, and the inventor finds that the larger the inclination angle of the raking inclined sieve is, the higher the ore sliding speed is, the larger the amount of ore flowing into the automatic sieve turning platform is, the poorer the ore dressing and screening effects are, and the greater the difficulty of subsequent manual sorting is; and as the inclination angle of the raking fence inclined screen becomes smaller, the ore sliding speed also becomes slower, ores with small particle sizes can fully fall into a raw ore storage bin, the screening effect can be improved, the screening efficiency can be obviously reduced, part of ores can be difficult to smoothly fall into an automatic overturning screen platform from sliding, the automatic screening efficiency of the raking fence inclined screen is influenced, the inclination angle of the raking fence inclined screen is controlled to be 28-36 degrees, the situation that the screening effect and the obtained high raw ore grade are influenced due to the fact that the ore sliding speed is too fast can be avoided, the follow-up manual sorting difficulty is reduced, large ores on the screen can be ensured to smoothly slide to the automatic overturning screen platform, and automatic ore dressing of the raking fence inclined screen is achieved. Further, the inventor also finds that if the spacing between the screen bars is too small, the screen holes are smaller, the grade of the obtained raw ore is higher, and conversely, the larger the large ore blocks on the automatic overturning screen platform are, the raw ore with relatively larger particle size is retained on the inclined screen surface and then slides to the automatic overturning screen platform, so that the difficulty of manual sorting is greatly increased; if the spacing between the screen bars is too large, the screen holes are also large, too much waste rocks fall into a raw ore storage bin, and the raw ore grade is obviously reducedThe raw ore of the grade can obviously reduce the manual sorting difficulty. Preferably, the distance between any two adjacent first screen bars can be the same, and the specifications of the screen bars can also be the same, so that the uniformity of the obtained raw ore can be further improved. In addition, it should be noted that the length of the pickoff fence inclined screen 210 along the inclined direction of the inclined screen is not particularly limited, and those skilled in the art can select the pickoff fence inclined screen according to actual needs.
According to another embodiment of the present invention, as shown in fig. 2, the side of the pickoff fence inclined screen 210 may be provided with a sidewalk, so that the first screen bar can be replaced or the ore retained on the screen surface can be cleaned more conveniently.
According to the embodiment of the invention, when the large waste stones and the ores on the raking fence inclined screen slide down to the automatic turnover screen, the automatic turnover screen is in a horizontal state, the large waste stones and the ores slide into the lower automatic turnover screen platform through the screen surface of the raking fence inclined screen, the large ores are further picked into the raw ore bin by manual picking, then the automatic turnover screen is controlled to turn over through the electric hoist, and the waste stones on the automatic turnover screen are poured into the waste ore bin.
According to an embodiment of the present invention, as can be understood by referring to fig. 3 and 4, strip-shaped screen holes can be formed between two adjacent second screen bars 221 in the automatic flip screen 220, and the cross section of the screen holes can be in a structure with a narrow top and a wide bottom, and the inventors found that by forming the strip-shaped screen holes, not only the inclined screen structure can be simplified, but also when small-particle-size raw ores with particle sizes smaller than the automatic flip screen holes slide down to the automatic flip screen, the small-particle-size raw ores can more smoothly fall into the raw ore storage bin, thereby preventing the small-particle-size raw ores from being blocked in the screen holes due to non-uniform particle sizes to affect the flatness of the screen surface of the automatic flip screen and the sliding path of large-sized ores on the raking fence inclined screen, and ensuring safety and operation efficiency during manual.
According to another embodiment of the present invention, the cross section of each second screen bar 221 in the automatic sieve turnover 220 can be respectively and independently an inverted trapezoid structure, so that not only can the cross sections of the formed screen holes be ensured to be all of a structure with a narrow top and a wide bottom, but also the aperture of the screen holes can be gradually increased along the direction towards the raw ore storage bin, thereby being more beneficial to the smooth falling of the raw ore with small particle size into the raw ore storage bin, and avoiding the problem that the raw ore with small particle size blocks the screen holes of the automatic sieve turnover. Further, the second screen bars 221 may also be trapezoidal steel with a large face facing upwards, and the thickness of the second screen bars 221 is preferably smaller than that of the first screen bars 211, and the inventor finds that, after being screened by the pickoff fence inclined screen, seventy percent or even more than eighty percent of the raw ores can fall into a raw ore storage bin, large waste rocks or ores which fall onto the automatic turnover screen only account for a small part of the treatment capacity of the raking fence inclined screen, even if the large waste rocks or ores slide on the automatic turnover screen, the abrasion to the automatic turnover screen is small, and the large waste rocks or ores slide to the automatic turnover screen platform and then can stand still, so that the abrasion to the automatic turnover screen can be greatly reduced, and the automatic turnover screen can be ensured to have better strength, wear resistance and service life by adopting the inverted trapezoidal interface screen bars with small thickness, meanwhile, the automatic overturning sieve is light due to the adoption of the trapezoid steel with small thickness, so that the overturning and falling of the automatic overturning sieve are facilitated.
According to another embodiment of the present invention, the cross section of each second screen bar 221 in the automatic upender 220 may be independently an i-shaped structure, for example, each second screen bar 221 may be independently an i-steel with a large surface facing upward, and the i-steel with a large surface facing upward may also form a structure with a narrow top and a wide bottom in the cross section of the screen hole, and as mentioned above, the i-steel may also be used as the second screen bar to ensure that the automatic upender has better strength, wear resistance and service life.
According to another embodiment of the present invention, each second screen bar 221 in the automatic overturning screen 220 can be separately and fixedly connected to the automatic overturning screen 220, and since the screen surface of the automatic overturning screen can be overturned when dumping waste rocks, the stability of the screen bars and the automatic overturning screen needs to be strictly ensured, and by fixedly connecting the screen bars to the automatic overturning screen, the automatic overturning screen can be overturned and fallen back as a whole, thereby preventing the screen bars from falling off during overturning, and significantly improving the safety during operation of the automatic overturning screen and the service life of the automatic overturning screen; preferably, the second screen bars 221 made of steel may be welded to the automatic flipper 220, whereby the stability of the automatic flipper during the flipping and falling process may be greatly improved.
According to another embodiment of the invention, the distance between the front end of the automatic turnover screen 220 and the tail end of the pickpocket inclined screen may be not more than 5cm, for example, may be 1cm, 1.5cm, 2cm, 2.5cm, 3cm, 3.5cm, 4cm, 4.5cm or 5cm, and preferably 3-5 cm, wherein the distance may be a horizontal distance, so that it is possible to prevent large waste rocks sliding down from the pickpocket inclined screen from falling into the raw ore storage bin, and free movement of the automatic turnover screen is not affected.
According to another embodiment of the present invention, the connection assembly 223 between the automatic turnover screen 220 and the bottom beam is not particularly limited, and those skilled in the art can select the connection assembly according to actual needs, and only the connection assembly 223 can rotate around the automatic turnover screen 220 under the control of the electric hoist 224 to dump the waste rocks. For example, the connecting component 223 between the automatic turnover screen 220 and the bottom beam may be a hinge, so that when the waste rock needs to be dumped, the electric hoist on the lifting truss is connected with the connecting component at the front end of the automatic turnover screen and lifts the automatic turnover screen, so that the automatic turnover screen rises and falls around the hinge, and the purpose of dumping large waste rock into the waste rock bin is achieved.
According to another embodiment of the invention, the connecting assembly 223 of the automatic turnover screen 220 and the bottom beam can be arranged below the automatic turnover screen 220, and the length of the tail end of the automatic turnover screen 220 extending out of the connecting assembly 223 can be smaller than the height of the connecting assembly 223 above the bottom beam, so that the automatic turnover screen can be freely turned over and fallen back, the tail end of the automatic turnover screen can be supported by the connecting assembly, and the phenomenon that the tail end of the automatic turnover screen extends out too long to limit the rotation angle of the automatic turnover screen and influence the waste rock turnover effect can be avoided.
According to another embodiment of the present invention, the distance between two adjacent second screen bars 221 in the automatic turnover screen 220 may be 5-14 cm, for example, 6cm, 7cm, 8cm, 9cm, 10cm, 11cm, 12cm, or 13cm, etc., preferably 5-10 cm. The automatic turnover screen is mainly used for manually selecting large waste stones and turning over waste stones, the automatic turnover screen is required to be turned over and fall back to a waste stone bin from the horizontal direction in the design process, smooth and safe manual selection is also required to be considered, namely, the large waste stones falling off from the pickoff inclined screen are required to be intercepted on the screen surface of the automatic turnover screen on one hand, and on the other hand, when the large ores are picked into a raw ore storage bin through manual selection, the operation safety of workers is also required to be ensured.
According to another embodiment of the present invention, a concrete partition wall may be disposed between the raw ore storage bin 300 and the waste rock bin 400, and the concrete partition wall may also serve as a bottom beam movably connected to the tail end of the automatic turnover screen, so that the raw ore storage bin and the waste rock bin may be separated from each other, and the tail end of the automatic turnover screen may be fixed and supported by the concrete partition wall, thereby better achieving the turnover and falling of the automatic turnover screen.
According to another embodiment of the present invention, referring to fig. 4, the beneficiation plant 200 may include at least one picket fence inclined screen 210 and at least two automatic turnover screens 220 arranged side by side, each automatic turnover screen 220 may be independently provided with a connector 222 matched with an electric hoist 224 and movably connected with a bottom beam, for example, each automatic upender 220 may be independently provided with a connector 222 matching with an electric hoist 224 and movably connected with a concrete partition wall for separating the raw ore bin 300 and the waste rock bin 400 by a hinge, therefore, at least two automatic turnover sieves can be used alternately, when one automatic turnover sieve needs to turn over waste rocks, at least one automatic turnover screen can still continuously receive and manually sort the large waste rocks and ores which slide off from the raking fence inclined screen, so that the mineral separation efficiency can be further improved, and the continuous mineral separation operation is realized. It should be noted that the width directions of the automatic turnover screen and the pickoff fence inclined screen are the same, and in addition, the number of the pickoff fence inclined screen and the automatic turnover screen in the mineral separation device is not particularly limited, and a person skilled in the art can select the pickoff fence inclined screen and the automatic turnover screen according to actual needs, for example, the pickoff fence inclined screen and the automatic turnover screen can be selected according to factors such as mineral separation treatment capacity and space environment of a mineral separation site, specifically, the pickoff fence inclined screen and the automatic turnover screen can be arranged in a one-to-one correspondence manner, and a setting manner that one pickoff fence inclined screen corresponds to a plurality of automatic turnover screens. Preferably, the automatic turnover screen 220 may extend at least to the end of the pickoff fence inclined screen 210 at both sides in the width direction thereof, so as to further ensure that ore sliding down from the pickoff fence inclined screen can fall onto the automatic turnover screen.
According to another embodiment of the invention, referring to fig. 4, the distance L between two adjacent automatic turnover screens2The thickness of the waste rock is not more than 8cm, for example, 2cm, 3cm, 4cm, 5cm, 6cm, 7cm or 8cm, so that the alternative operation of the two automatic turnover sieves is not influenced, the waste rock can be prevented from sliding off from a gap between the automatic turnover sieves, and the operation safety of operators is ensured. Wherein, the distance L between two adjacent automatic turnover screens2It can be understood as the minimum distance between two adjacent screen bars of two automatic turnover screens.
According to another embodiment of the invention, the connecting pieces 222 matched with the electric hoists 224 on each automatic overturning sieve 220 can be arranged in pairs, and the connecting pieces 222 arranged in pairs can be symmetrically distributed on two sides of the automatic overturning sieve 220 in the width direction, so that the consistency of the rotation angle of the automatic overturning sieve in the overturning and falling processes can be further improved, and the situation that waste rocks slide to a raw ore storage bin due to inclination caused by uneven stress on the automatic overturning sieve is avoided.
According to an embodiment of the present invention, referring to fig. 4 to 5, a supporting beam 600 may be disposed between the pickpocket inclined screen 210 and the automatic overturning screen 220 to fix the lower end of the pickpocket inclined screen 210 and support the front end of the automatic overturning screen 220, so as to further facilitate the large ore and waste rock on the pickpocket inclined screen to slide to the automatic overturning screen.
According to another embodiment of the invention, referring to fig. 4 to 5, the supporting beam 600 may include a cross beam 610 and a supporting column 620, the cross beam 610 may be arranged along the width direction of the pickpocket inclined screen 210, the tail end of the pickpocket inclined screen 210 abuts against one side of the cross beam 610, the front end of the automatic overturning screen 220 is supported by the other side of the cross beam 610, and the supporting column 620 is disposed below the cross beam 610 and supports the cross beam 620, wherein the supporting column may be directly disposed in the raw ore storage bin to support the cross beam, it should be noted that one side of the cross beam 610 close to the pickpocket inclined screen 210 is higher than one side thereof close to the automatic overturning screen 220, so that the pickpocket inclined screen is fixed by the supporting beam and supports the free overturning screen, and not only end-to-end connection of the automatic overturning screen and the pickpocket inclined screen can be achieved, but also stability of the ore dressing apparatus is further facilitated.
According to another embodiment of the present invention, referring to fig. 4, the beam 610 may satisfy at least one of the following conditions: one side of the cross beam 610 close to the pickoff fence inclined screen 210 may be provided with a plurality of first grooves (not shown) suitable for the first screen bars 211 to be embedded, so that the first screen bars can be embedded in the first grooves to fix the lower end of the pickoff fence inclined screen; further, one side of the cross beam 610 close to the automatic upender 220 may be provided with a plurality of second grooves (not shown) suitable for the second screen bars 221 to be embedded, so that when the automatic upender is in a horizontal position, the second screen bars can be embedded into the second grooves to improve the stability of automatic upending in the sliding and manual sorting processes of large ores and waste rocks, and ensure the operation safety; two platforms with different heights can be respectively formed on one side of the beam 610 close to the pickpocket inclined screen 210 and one side close to the automatic overturning screen 220, and the vertical arrangement of the pickpocket inclined screen and the automatic overturning screen, the fixation of the tail end of the pickpocket inclined screen and the support of the front end of the automatic overturning screen are realized through the platforms with different heights. In addition, referring to fig. 4, the height of the cross beam 610 close to the side of the pickpocket inclined screen 210 may be greater than the height of the automatic overturning screen 220 when the automatic overturning screen is located at a horizontal position, so that it can be further ensured that the automatic overturning screen platform is located below the tail end of the pickpocket inclined screen, and it is more beneficial for large waste rocks and ores on the pickpocket inclined screen to smoothly slide to the free overturning screen.
According to an embodiment of the present invention, referring to fig. 4, a fixed beam 700 may be disposed in the middle of the pickpocket fence inclined screen 210, the fixed beam 700 may be disposed below the pickpocket fence inclined screen and parallel to the cross beam 610, and a plurality of third grooves (not shown) suitable for embedding the first screen bars may be disposed on the fixed beam 700.
According to an embodiment of the present invention, the end of the tail end of the automatic flip sieve 220 may extend to above the waste rock bin 400, thereby further ensuring that all the waste rocks on the automatic flip sieve can slide down to the waste rock bin.
According to an embodiment of the present invention, as shown in fig. 6, the mine downhole raw ore pre-dumping system may further include a slant-shaft lifting device 500, and the slant-shaft lifting device 500 is adapted to transfer the waste rock stored in the waste rock bin 400 to the goaf, so as to backfill the goaf. Further, the waste rock bin 400 may include a first waste rock bin 410 and a second waste rock bin 420, a discharge end of the first waste rock bin 410 may be provided at a lower portion of the inclined shaft lifting device 500, the second waste rock bin may be provided at an upper portion of the inclined shaft lifting device 500, wherein, the first waste rock bin 410 is mainly used for temporarily storing the waste rocks after mineral separation, the second waste rock bin 420 is mainly used for temporarily storing the waste rocks for backfilling the goaf, the inclined shaft lifting device 500 is suitable for transferring the waste rocks in the first waste rock bin 410 to the second waste rock bin 420, the waste rocks in the second waste rock bin 420 are suitable for transferring to the goaf through a mine car, and the waste rocks in the second waste rock bin 420 are transferred to the goaf, so that the goaf can be timely refilled with the waste rocks pre-thrown by the pre-waste throwing system, therefore, the problem of filling materials in the mine dead zone is solved, the quantity of the waste rocks discharged from the pits is reduced, and the lifting pressure of the vertical shaft is relieved while the mine dead zone is effectively treated.
According to another embodiment of the present invention, as shown in fig. 6, the slant well lifting device 500 comprises a winch, a side dump car and a rail, wherein the side dump car is driven by the winch to reciprocate along the rail between the first waste rock bin and the second waste rock bin to transfer the waste rock in the first waste rock bin to the second waste rock bin, and wherein the side dump car can further improve the level of mechanization and reduce manual labor. In addition, the inclined angle of the inclined shaft hoisting device 500 in the present invention is not particularly limited, and those skilled in the art can select the inclined shaft hoisting device according to actual needs. In addition, it should be noted that the inclined shaft hoisting device adopted in the invention is different from the inclined shaft hoisting device which is used in the existing mining action and distributed in a stair-type manner in a plurality of mining middle sections, the inclined shaft hoisting device in the existing mining operation is mostly used for ore removal of raw ores, a vertical shaft is used for ore removal of raw ores in the application, the inclined shaft hoisting devices 500 are respectively and independently distributed in each mining middle section and only used for transferring waste rocks, and therefore, the purpose that the waste rocks in a specific mining middle section are used for backfilling the mining middle section goaf is achieved.
According to another embodiment of the present invention, at least one of the raw ore bin 300 and the waste rock bin 400 may be provided with a vibrating ore hopper, for example, the vibrating ore hopper may be provided at the bottom of each of the raw ore bin 300, the first waste rock bin 410 and the second waste rock bin 420, and through the combination of the automatic ore dumping device, the raking fence inclined screen, the automatic turning screen, the vibrating ore hopper, the inclined shaft lifting and transporting, the mechanization level of the mine may be greatly improved, the labor intensity of the operators may be reduced, and the present invention has good social and economic values.
According to yet another embodiment of the present invention, the discharge end of the raw ore bin 300 may be connected to a ore removal device of another mining mid-section below the mining mid-section where the raw ore bin 300 is located, whereby the obtained raw ore may be output through a shaft lift through an ore removal tunnel of another mining mid-section below the mining mid-section where the raw ore bin is located.
In summary, the mine underground raw ore pre-waste-throwing system provided by the embodiment of the invention at least has the following advantages: 1. the raw ore is pre-polished with a part of waste rock in advance in the underground, so that the grade of the protruding raw ore is improved, the ore dressing principle that the waste rock can be polished in advance is realized in the underground, and the production cost of an ore dressing plant is effectively reduced; 2. the quantity of the waste rocks discharged from the pits is reduced, and the lifting pressure of the vertical shaft is relieved; 3. the pre-cast barren rocks can be backfilled in the goaf in time, and the mine goaf can be effectively treated. The volume of a mined-out area of a mine is increased day by day after years of large-scale mining, and the mined-out area is required to be backfilled urgently; 4. through the combination of the automatic ore dumping device, the raking fence inclined screen, the automatic screen overturning, the vibrating ore discharging bucket, the inclined shaft lifting and transporting and the like, the mechanization level of the mine is greatly improved, and the labor intensity of operators is reduced.
According to a second aspect of the invention, a mine mining system is provided. According to the embodiment of the invention, the system comprises the mine underground raw ore pre-waste-throwing system. The mine mining system comprises a plurality of subsystems, such as a mining subsystem, a mineral separation subsystem, an ore removal subsystem, a ventilation subsystem and the like, and the mine mining system can improve the grade of the extracted ore, reduce the extracted rock amount, relieve the lifting pressure of a vertical shaft, and timely backfill the extracted area of the pre-removed ore by adopting the underground mine raw ore pre-removing waste system to replace the existing mineral separation subsystem, so that the production cost of a concentrating mill is reduced, the mechanization level of the mine can be improved, the extraction cost and the labor intensity are reduced, and the mine mining system has better social and economic values. It should be noted that, the features and effects described for the above-mentioned mine underground raw ore pre-waste-throwing system are also applicable to this mine mining system, and are not described in detail here.
The scheme of the invention will be explained with reference to the examples. It will be appreciated by those skilled in the art that the following examples are illustrative of the invention only and should not be taken as limiting the scope of the invention. The examples, where specific techniques or conditions are not indicated, are to be construed according to the techniques or conditions described in the literature in the art or according to the product specifications.
Example 1
The underground raw ore pre-throwing system in the mine is arranged from the middle section of a tin-washing pit tungsten ore 056 to the middle section of 106, and comprises a raw ore automatic dumping device, a raking inclined screen, an automatic overturning screen, a raw ore storage bin, a waste rock bin, a vibrating ore placing hopper, an inclined shaft lifting device and the like as shown in fig. 7. The current production scale of the tin-washing pit tungsten ore is 50 ten thousand t/a, and underground mining, footrill + blind shaft + blind inclined shaft combined development and shallow hole shrinkage mining are adopted. Wherein the inclination angle of the grate bars of the pickoff fence is 32 degrees, and the spacing between the grate bars is 15 cm; automatic sieve face of turning over sieve is good atThe large faces of the I-shaped steel are upward and formed at intervals of 12cm, the I-shaped steel is welded on the automatic turnover screen, the head end of the automatic turnover screen is connected and controlled with an electric hoist on the lifting truss through a connecting piece, the tail end of the automatic turnover screen is movably connected with a hinge between the bottom beams, and the turnover screen is controlled to rise and fall around the hinge through the electric hoist; the bottom of the raw ore storage bin is communicated with a 056 middle section transportation roadway; the number of the waste rock bins 1 is located at the tail end of the automatic turnover screen and used for storing waste rocks, and the number of the waste rock bins 2 is located at the upper part of the inclined shaft lifting and transporting system and used for storing and transporting waste rocks after primary selection for filling; three vibration ore discharging hoppers are arranged and are respectively arranged at the bottoms of the raw ore storage bin, the No. 1 waste rock bin and the No. 2 waste rock bin and used for automatic ore discharging; the inclined shaft hoisting device consists of an inclined shaft, a rope way, a winch, a loose wheel and a 2.7m shaft3The side dump type mine car is mainly used for transferring the waste rocks in the waste rock bin 1 to the waste rock bin 2 and transferring the waste rocks in the waste rock bin 2 to the gob in the middle section 106.
When the system is adopted for pre-throwing the raw ore, the raw ore transported by a 106 middle-section transportation roadway mine car is transferred through an automatic ore pouring device and poured into a raking inclined screen surface, the small-particle-size raw ore directly enters a raw ore storage bin through screen strip gaps, the raw ore storage bin ore is placed into the mine car through a 056 middle-section vibration ore placing hopper, the ore is transferred to a ground selecting factory through a vertical shaft, large waste stones and ore slide into an automatic turnover screen platform below through the inclined screen surface, then the ore on the platform is further picked into the raw ore storage bin through manual selection, the waste stones in the automatic turnover screen are lifted through an electric hoist and poured into a 1# waste stone bin, and the waste stones are placed into a 2.7m storage bin through a vibration ore placing hopper3In the side dump type mine car, the waste rocks in the 2# waste rock bin and the 2# waste rock bin are transferred to the 2# waste rock bin through the inclined shaft lifting and transporting system and are put into a 106 middle section of 0.75m through a vibrating ore placing hopper3In the mine car, the mine car is transferred to each goaf through a locomotive to fill the goaf.
The underground raw ore pre-throwing waste system is put into test operation in 2017 in 8 months, and the change situation of the raw ore grade is as follows: 0.388% in 2016, 0.419% in 2017, 0.520% in 2018, 0.500% in 2019, and normal operation of the raw ore pre-throwing waste system in 2018 and 2019, wherein the raw ore grade tends to be stable and is improved by about 0.1% compared with the original ore grade before comparison. In addition, the underground crude ore pre-throwing waste system has 5828 tons of waste stones pre-thrown in 2017, 22747 tons of waste stones pre-thrown in 2018 and 19581 tons of waste stones pre-thrown in 2019, and the waste throwing rate is about 15%; the method reduces the waste rock caving amount by about 2 ten thousand tons every year while improving the grade of the raw ore, and can save about 26 ten thousand yuan of lifting and transporting cost every year according to the lifting and transporting cost of 13 yuan/ton; for the fixed lifting capacity of the vertical shaft, the waste stone is replaced by the crude ore lifting outlet, and the yield of tungsten concentrate (65 degrees) can be increased every year in the mine: 20000 ton x 0.5% (raw ore grade) x 86.5% (ore dressing recovery) x 95% (concentration recovery)/0.65% ═ 126.4 ton, calculated according to tungsten concentrate (65 °) market price 7.5 ten thousand yuan/ton, annual increase output value is 126.4 ton x 7.5 ten thousand yuan/ton 948 ten thousand yuan.
In conclusion, by the mine underground raw ore pre-waste-throwing system provided by the embodiment of the invention, underground raw ore is subjected to pre-waste-throwing treatment, the waste throwing rate reaches about 15%, the grade of the protruding raw ore is improved, the lifting pressure of a vertical shaft is relieved, and the production cost of enterprise units is reduced; the pre-cast waste rock is backfilled in the goaf in time, so that the quantity of the waste rock which exits from the pits is reduced, and the mine goaf can be effectively treated; the construction of the underground raw ore pre-waste-throwing system greatly improves the mechanization level of the mine, reduces the labor intensity of operators and has better social and economic values.
In the description herein, references to the description of the term "one embodiment," "some embodiments," "an example," "a specific example," or "some examples," etc., mean that a particular feature, structure, material, or characteristic described in connection with the embodiment or example is included in at least one embodiment or example of the invention. In this specification, the schematic representations of the terms used above are not necessarily intended to refer to the same embodiment or example. Furthermore, the particular features, structures, materials, or characteristics described may be combined in any suitable manner in any one or more embodiments or examples. Furthermore, various embodiments or examples and features of different embodiments or examples described in this specification can be combined and combined by one skilled in the art without contradiction.
Although embodiments of the present invention have been shown and described above, it is understood that the above embodiments are exemplary and should not be construed as limiting the present invention, and that variations, modifications, substitutions and alterations can be made to the above embodiments by those of ordinary skill in the art within the scope of the present invention.
Claims (10)
1. The utility model provides a useless system of throwing in advance of mine underground crude ore which characterized in that includes: automatic device, ore dressing device, former ore storage storehouse and barren rock storehouse of falling of former ore, wherein:
the ore dressing device is established raw ore warehouse top just is located the automatic ore device below that falls of raw ore, the barren rock storehouse is established the ore dressing device tail end, the ore dressing device includes the raking bar inclined screen and the automatic sieve that turns over that arrange from beginning to end:
the inclined raking fence sieve is obliquely arranged, the upper end of the inclined raking fence sieve corresponds to the discharge end of the automatic crude ore dumping device, and the inclined raking fence sieve comprises a plurality of first sieve bars which are arranged at intervals along the width direction of the inclined raking fence sieve;
automatic sieve that turns over is located it establishes to take off fence inclined screen below and its front end take off the tail end of fence inclined screen, automatic sieve that turns over includes many side by side and interval arrangement's second grating, arbitrary adjacent two the interval of second grating is less than arbitrary adjacent two the interval of first grating, automatic sieve front end that turns over is equipped with connecting piece, tail end and floorbar swing joint with electric block matching, automatic sieve that turns over is suitable for realize from horizontal position towards the upset in waste rock storehouse and fall back around its coupling assembling with the floorbar under electric block's the control.
2. The mine downhole run-of-mine pre-dumping system of claim 1, wherein at least one of the following conditions is met:
a strip-shaped sieve pore is formed between every two adjacent first sieve bars, and the cross section of the sieve pore is of a structure with a narrow top and a wide bottom;
the cross section of each first screen bar is of an inverted trapezoid structure independently.
3. The mine downhole run-of-mine pre-dumping system of claim 1, wherein at least one of the following conditions is met:
each first screen bar is made of trapezoidal steel with a large face facing upwards;
each first sieve bar is detachably fixed on the inclined sieve of the pickoff fence;
the distance between two adjacent first screen bars is adjustable.
4. The mine underground raw ore pre-throwing waste system according to claim 1, wherein the inclination angle of the raking fence inclined screen is 28-36 degrees, and the distance between every two adjacent first screen bars is 12-18 cm.
5. The mine downhole run-of-mine pre-dumping system of claim 1, wherein at least one of the following conditions is met:
a strip-shaped sieve pore is formed between every two adjacent second sieve bars, and the cross section of the sieve pore is of a structure with a narrow top and a wide bottom;
the cross section of each second screen bar is of an inverted trapezoidal structure independently;
the cross section of each second screen bar is of an I-shaped structure independently;
each second screen bar is independently an I-shaped steel with a large face upwards; the distance between the front end of the automatic overturning sieve and the tail end of the raking fence inclined sieve is not more than 5 cm.
6. The mine downhole run-of-mine pre-dumping system of claim 1, wherein at least one of the following conditions is met:
each second screen bar is respectively and independently fixedly connected to the automatic turnover screen;
the connecting component of the automatic sieve turnover and the bottom beam is a hinge;
the automatic turnover screen is arranged below the automatic turnover screen through the connecting assembly of the automatic turnover screen and the bottom beam, and the tail end of the automatic turnover screen extends to the length outside the connecting assembly and is smaller than the height above the bottom beam through the connecting assembly.
7. The mine underground raw ore pre-throwing waste system according to claim 1, wherein the distance between two adjacent second screen bars is 5-14 cm.
8. The mine downhole raw ore pre-dumping system according to claim 1, wherein a concrete partition is provided between the raw ore storage bin and the waste rock bin, and the concrete partition is also used as the bottom beam.
9. The mine underground raw ore pre-throwing waste system according to claim 1, wherein the ore dressing device comprises at least one raking fence inclined screen and at least two automatic turning screens arranged side by side, each automatic turning screen is independently provided with a connecting piece matched with the electric hoist and is movably connected with the bottom beam.
10. A mine mining system, characterized by comprising the mine downhole raw ore pre-dumping system of any one of claims 1 to 9.
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