CN109899072B - Circulating walking operation method for working face of dragline of opencast coal mine - Google Patents
Circulating walking operation method for working face of dragline of opencast coal mine Download PDFInfo
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Abstract
The invention provides a circulating walking operation method for a working surface of a dragline of an opencast coal mine, which mainly comprises the following steps: s1, dividing the stope into a reverse-stacking mining operation area and a raw coal recovery operation area; s2, performing reverse pile operation on the raw coal mining operation area in the step S1, then starting the raw coal mining operation on the coal seam exposed out of the raw coal mining operation area by a part of coal mining equipment, and simultaneously performing perforation operation on the rock high steps of the reverse pile mining operation area in the step S1; and S3, when the raw coal recovery operation of the reverse-stacking mining operation area in the step S2 is finished, moving another part of coal mining equipment to the coal face of the raw coal recovery operation area. According to the walking operation method, the dragline does not need to move around the refuse dump, and three reserved channels are saved, so that the distance and time for moving the dragline are reduced, and the disposal space of the refuse dump is increased.
Description
Technical Field
The invention belongs to the technical field of open pit mining, and particularly relates to a circulating walking operation method for a working surface of a dragline of an open pit coal mine.
Background
A dragline is a large-scale electric power excavating equipment mainly applied to the field of opencut coal miningLarge linear size (the operation radius is generally 100m and the self weight is more than 6000 t), high cost (the price exceeds 10 hundred million RMB in 2010), and large operation capacity (the annual stripping capacity is about 2000-3000 ten thousand m)3) High efficiency (higher than 4000 m)3H) low operation cost (4-7 yuan/m)3) Green and environment-friendly, but the moving of the dragline is very slow (about 210m/h), and the working surface needs to be leveled in advance before operation.
The basic operation flow of the bucket-pulling shovel-dumping process is as follows: firstly, perforating and charging the coal on the rock about 50m above the coal seam roof, then carrying out throwing blasting, standing a dragline on the leveled blasting pile, and piling the rest materials which do not enter the waste dump to the waste dump, thereby exposing the coal seam.
The overall mining procedure of the dragline reverse pile system is as follows: the working line of the stope is about 2km generally, the stope is divided into two stopes, namely a reverse pile operation area and a coal mining operation area, the dragline and the raw coal mining equipment are respectively pushed from the middle part to the two ends, and the coal conveying channel is arranged in the middle part of the stope. When the coal mining operation area carries out raw coal mining, the upper high step of the coal mining operation area carries out perforation operation in advance, and the throwing blasting can be carried out after the raw coal mining operation is finished. When the two mining areas respectively complete the reverse pile operation and the raw coal recovery operation, the reverse pile and the coal mining equipment exchange the mining areas, the dragline is moved around the dumping field through the ditch outlet channel of the reverse pile operation area, and enters the other mining area from the middle ditch inlet channel.
The prior art has the following disadvantages: because the blasting pile formed by the throwing blasting can block a raw coal feeding channel, in order to ensure that the succession of the throwing blasting, the dragline operation and the raw coal mining is normal, the dragline needs to go out of a working face by virtue of a refuse dump road to realize the zone changing operation, a walking track in a stope is in a horizontal 8 shape, seven channels need to be reserved in the stope, four of the channels are used as ditch and ditch channels of the dragline, the remaining three channels are used as coal feeding channels, and the arrangement of the seven channels seriously occupies the discarding space.
Therefore, there is a need to provide an improved solution to the above-mentioned deficiencies of the prior art.
Disclosure of Invention
The invention aims to overcome the defects that in the prior art, a coal feeding channel of coal conveying equipment is obstructed by a dump formed by throwing blasting, and the area changing operation needs to be carried out in a mode of walking out of a working face in order to ensure that the dragline is normally connected in the whole stope, so that the moving distance of the dragline is increased, more ditch outlet channels and ditch inlet channels need to be reserved when the dragline is moved, the discharge space of a refuse dump is further occupied, the integral production efficiency is reduced, the coal yield of raw coal is reduced, and the production cost is increased.
In order to achieve the above purpose, the invention provides the following technical scheme:
a method for circulating operation of a working surface of a dragline of an opencast coal mine, preferably, the method comprises the following steps:
s1, dividing the stope into a reverse-stacking mining operation area and a raw coal recovery operation area;
s2, performing reverse pile operation on the raw coal mining operation area in the step S1, performing raw coal mining operation on the coal seam exposed out of the raw coal mining operation area by a part of coal mining equipment, and performing perforation operation on the rock high step of the reverse pile mining operation area in the step S1;
and S3, when the raw coal recovery operation of the reverse-heap mining operation area in the step S2 is finished, moving another part of coal mining equipment to the coal face of the raw coal recovery operation area, carrying out throwing blasting after the high-step perforating charge of the rock to be thrown and blasted in the reverse-heap mining operation area is finished, obtaining a throwing blasting pile, and repeating the operations of the step S1 and the step S2.
As mentioned above, in the method for circulating operation of the working surface of the dragline for an open pit coal mine, preferably, the step S2 specifically includes the following steps:
s201, perforating and charging in a raw coal recovery operation area, and then carrying out throwing blasting to obtain a throwing blasting explosive pile, wherein the throwing blasting explosive pile comprises an upper layer and a lower layer;
s202, pushing part of materials in the upper layer of the blasting stack in the step S201 to the outer side of the working face to form an expansion step;
s203, the dragline is moved towards the inner side of the working face of the raw coal mining operation area and pushed along the inner side of the working face to the end slope, only the materials on the inner side of the working face are dumped to the outer side of a refuse dump during dumping operation, and the materials on the expanded step are not processed;
s204, leveling the materials discharged to the outer side of the refuse dump in the step S203 by the bulldozer to form a dragline work platform;
s205, repeating the step S202 to the step S204 until the dragline is pushed to the end slope of the raw coal recovery operation area, and performing perforation operation on the high step to be thrown and blasted in the reverse pile mining operation area by the drilling machine and performing raw coal recovery operation on the coal mining equipment in the reverse pile mining operation area while performing operation in the step S201 to the step S204.
As mentioned above, in the method for circulating operation of the working surface of the dragline for an open pit coal mine, preferably, the step S3 specifically includes the following steps:
s301, before the dragline is pushed to the middle of a stope, the raw coal recovery operation of a reverse-stacking mining operation area is finished, the coal mining equipment is moved to a coal mining working face of the raw coal recovery operation area, and the rock to be thrown and blasted in the reverse-stacking mining operation area is thrown and blasted after the high-step perforating charge of the rock is finished, so that a throwing blasting pile is obtained;
s302, the throwing blasting explosive in step S301 is operated according to the operation method of steps S202 to S205.
In the method for circulating operation of the working face of the dragline for open pit coal mine as described above, preferably, the working lines of the inverted pile mining working area and the raw coal extraction working area in step S1 have the same length.
In the method for the circulating traveling operation of the working surface of the dragline for the open pit coal mine, preferably, in the step S202, the distance for pushing part of the materials in the upper layer of the blasting pile to the outer side of the working surface is 15.6m, and the width of the formed expanding step is 25-40 m.
In the above method for circulating operation of the working surface of the dragline for the open pit coal mine, in step S203, the distance of movement of the dragline to the inner side of the working surface for the raw coal extraction operation is preferably 10 to 20 m.
In the method for circulating-line operation of the working face of the dragline in the open pit coal mine as described above, preferably, the raw coal mined by the coal mining equipment in step S205 is transported through four coaling paths.
In the method for the circulating walking operation of the working face of the dragline of the opencast coal mine, preferably, the four coaling channels are a fourth coaling channel and a fifth coaling channel which are positioned at the left end of the stope, and a sixth coaling channel and a seventh coaling channel which are positioned at the right end of the stope.
In the method for the circulating running operation of the working face of the dragline of the opencast coal mine, preferably, the fourth coaling channel and the seventh coaling channel are respectively positioned at the leftmost end and the rightmost end of the stope, the fifth coaling channel is positioned at the inner side close to the fourth coaling channel, and the sixth coaling channel is positioned at the inner side close to the seventh coaling channel.
In the method for circulating running operation of the working face of the dragline of the open pit coal mine, preferably, the fourth coaling channel and the seventh coaling channel are symmetrically distributed on the left and right of the central line of the stope, and the fifth coaling channel and the sixth coaling channel are symmetrically distributed on the left and right of the central line of the stope.
Compared with the closest prior art, the technical scheme provided by the invention has the following excellent effects:
the invention reduces the number of channels of the whole stope by changing the running method of the dragline, further reduces the moving distance and time of the dragline and increases the discharge space of a refuse dump, and compared with the prior art, the invention at least has the following technical effects:
1) although the number of the coal feeding channels is increased from the three to four, the dragline does not need to be moved out of the working face in the moving process, and the channel for discharging and entering the dragline in the moving process does not need to be reserved, so that the original seven channels for respectively carrying out raw coal transportation and dragline moving are changed into four raw coal transportation channels, and the soil discharge space of a soil discharge yard occupied by the channels is further reduced.
2) According to the travelling method, the dragline does not need to enter the next mining area through the dragline travelling channel of the refuse dump, and the conversion of the next mining area can be completed on the working face, so that the travelling time of the dragline is reduced, the effective operation time is increased, and the refuse dump refuse discharging space occupied by the refuse dump travelling channel is saved.
3) According to the travelling method, the dragline does not need to be moved through the refuse dump walking channel, so that auxiliary projects such as cable moving, construction and maintenance of the dragline travelling channel and the like are greatly reduced, and the production cost is saved.
Drawings
FIG. 1 is a schematic view of a stope in a conventional dragline dump method;
FIG. 2 is a schematic illustration of a dragline dump face in accordance with an embodiment of the present invention;
FIG. 3 is a left side view of FIG. 2;
FIG. 4 is a schematic view of a stope with a dragline according to an embodiment of the present invention operating from the middle of the face;
FIG. 5 is a schematic view of a stope during normal operation of a dragline of an embodiment of the present invention in a raw coal recovery operation area;
FIG. 6 is a schematic view of a stope with a dragline according to an embodiment of the present invention operating in a raw coal extraction area and advancing to an end slope;
FIG. 7 is a schematic view of a stope with a dragline according to an embodiment of the present invention operating in a raw coal recovery area, pushing from the end to the face;
fig. 8 is a schematic view of a stope when a dragline according to an embodiment of the present invention is about to complete a task of a raw coal recovery operation area and prepare to advance to a reverse pile mining operation area.
In the figure: 1. a reverse-dump mining operation area; 2. a raw coal recovery operation area; 301. a first channel outlet; 302. a second channel outlet; 401. a first trench entry channel; 402. a second channel-in channel; 501. a first coaling channel; 502. a second coaling channel; 503. a third coaling channel; 504. a fourth coaling channel; 505. a fifth coaling channel; 506. a sixth coaling channel; 507. a seventh coaling channel; 6. a refuse dump; 7. a high step punching operation area; 8. a rock high step to be thrown and blasted; 9. the inner side of the reverse stacking working surface; 10. layering on the blasting pile; 11. throwing blasting and blasting; 12. a bulldozer; 13. expanding steps; 14. the outside of the refuse dump; 15. the inner side of a refuse dump; 16. uncovering the coal seam; 17. a dragline; 18. an electric shovel; 19. a truck; 20. the walking track of the existing dragline.
Detailed Description
The technical solutions in the embodiments of the present invention will be described clearly and completely below, and it is obvious that the described embodiments are only a part of the embodiments of the present invention, and not all embodiments. All other embodiments that can be derived by one of ordinary skill in the art from the embodiments given herein are intended to be within the scope of the present invention.
The present invention will be described in detail below with reference to the embodiments with reference to the attached drawings. It should be noted that the embodiments and features of the embodiments may be combined with each other without conflict.
As shown in fig. 1, the main processes of the current dragline working face circulation traveling operation method are as follows:
the stope is divided into two mining areas, namely an inverted pile mining operation area 1 and a raw coal mining operation area 2, which have the same length as a working line. The stripping equipment of the dragline 17, the coal mining equipment such as an electric shovel 18 and a truck 19 and the like are respectively pushed from the middle part of the stope to the two ends, and a coal feeding channel is arranged in the middle part of the stope. When the raw coal recovery operation area 2 carries out raw coal mining, the dragline 17 carries out reverse pile operation in the reverse pile mining operation area 1, meanwhile, high steps on the upper portion of the raw coal recovery operation area 2 carry out perforation charging operation at the same time, after the raw coal recovery operation area 2 and the reverse pile mining operation area 1 complete operation, the high step perforation operation area 7 on the upper portion carries out throwing blasting, after the throwing blasting is completed, the dragline 17 and the coal mining equipment exchange mining areas, namely the dragline 17 is moved to the previous raw coal mining operation area, the coal mining equipment is moved to the previous reverse pile mining operation area 1, and then the reverse pile and the raw coal mining operation are carried out.
When the dragline 17 and the coal mining equipment exchange mining areas, the dragline 17 needs to move through a ditch outlet channel of the inverted mining operation area 1, bypass the refuse dump 6, and then enter another mining area through a ditch inlet channel in the middle of the mining area. When the two sets of equipment for reverse piling and mining are exchanged for mining, in order to ensure that the continuous operations of throwing blasting, dragline 17 operation and raw coal mining operation are normal, the dragline 17 needs to go out of a working face by means of a traveling channel reserved for the dump 6 to realize the area changing operation.
When the dragline 17 is moved from the inverted pile mining operation area 1 to the raw coal recovery operation area 2, the dragline 17 is moved from the inverted pile mining operation area 1, passes through the first ditch outlet channel 301 and bypasses the left side of the waste dump 6 of the inverted pile mining operation area 1, continues to be moved at the lower side of the waste dump 6 of the inverted pile mining operation area 1, then passes through the second ditch inlet channel 402 and bypasses the left side of the waste dump 6 of the raw coal recovery operation area 2 to enter the upper side of the raw coal recovery operation area 2, and finally enters the raw coal recovery operation area 2.
When the dragline 17 is moved from the raw coal mining operation area 2 to the inverted pile mining operation area 1, the dragline 17 is moved from the raw coal mining operation area 2, passes through the second ditch outlet channel 302 and bypasses the right side of the waste dump 6 of the raw coal mining operation area 2, continues to be moved at the lower side of the waste dump 6 of the raw coal mining operation area 2, passes through the first ditch inlet channel 401 and bypasses the right side of the waste dump 6 of the inverted pile mining operation area 1 to enter the upper side of the inverted pile mining operation area 1, and finally enters the inverted pile mining operation area 1. It should be noted that the names of the inverted pile mining operation area and the raw coal recovery operation area 2 are changed as the dragline 17 is interchanged with the coal mining equipment.
From the above process, it can be seen that the existing dragline 17 needs to bypass the dump site 6 when traveling, the traveling track 20 of the existing dragline is in a horizontal 8 shape, the travel distance is correspondingly increased, in addition, seven channels need to be reserved in the whole stope for traveling of the dragline 17 and transportation of raw coal, and the first ditch entering channel 401, the second ditch entering channel 402, the first ditch exiting channel 301, the second ditch exiting channel 302, and the first coal feeding channel 501, the second coal feeding channel 502 and the third coal feeding channel 503 for transporting raw coal of each coal seam are respectively used for moving the dragline 17 in the seven channels. The arrangement of the seven channels of the dragline 17 greatly occupies the soil discharge space of the soil discharge site 6, the construction and maintenance of the walking channels of the dragline 17 of the soil discharge site 6 increase the operation cost, the effective operation time of the dragline 17 is reduced when the mining area is changed, the auxiliary work amount of cable moving is increased, the operation efficiency of the dragline 17 is reduced, and the walking channels correspondingly additionally occupy a large amount of soil discharge space.
Example 1
As shown in fig. 2 to 8, the invention provides a circulating running operation method for a working surface of a dragline of an opencast coal mine, which comprises the following steps:
and S1, dividing the stope into an inverted mining operation area 1 and a raw coal mining operation area 2, wherein in specific implementation, the lengths of the working lines of the inverted mining operation area 1 and the raw coal mining operation area 2 are equal, and when the lengths of the working lines of the two operation areas are equal, the four channels of the two operation areas can be symmetrically arranged.
S2, performing a reverse pile operation on the raw coal mining operation area 2 in step S1, and then performing a raw coal mining operation on the coal seam 16 uncovered by the raw coal mining operation area 2 by a part of coal mining equipment, wherein the coal mining device mainly includes a shovel 18 and a truck 19, the shovel 18 is used for transporting the coal seam 16 uncovered by peeling to the truck 19, then the truck 19 transports the raw coal out of the working face through a coal loading channel, and simultaneously performs a perforation operation on the rock high step of the reverse pile mining operation area 1 in step S1, and step S2 specifically includes the following steps:
s201, perforating and charging are carried out in the raw coal recovery operation area 2, then throwing blasting is carried out, and a throwing blasting explosive pile 11 is obtained, wherein the throwing blasting explosive pile 11 comprises an upper explosive pile layer 10 and a lower explosive pile layer. Part of the materials in the layer 10 on the blasting pile are directly thrown to the inner side 15 of the waste dump without being dumped, and the rest materials are dumped through a dragline 17.
And S202, pushing part of the materials in the upper layering of the blasting stack in the step S201 to the outer side of the working face to form an expanding step 13. In specific implementation, the distance of pushing part of the materials in the upper layer 10 of the blasting stack to the outer side of the working face is 15.6m, and the width of the formed expanding step 13 is 25-40 m (such as 25m, 28m, 30m, 32m, 35m, 36m, 38m and 40 m).
S203, the dragline 17 moves towards the inner side of the working face of the raw coal mining working area 2 and pushes the raw coal mining working area towards the end slope along the inner side 9 of the inverted working face, only the materials on the inner side of the working face are inverted to the outer side 14 of the waste dump during inverted stacking operation, the materials on the expansion step 13 are not processed, and a platform is mainly provided for the movement and operation of the dragline 17. In specific implementation, the moving distance of the dragline 17 to the inner side direction of the working face of the raw coal recovery operation is 10-20 m (such as 10m, 12m, 15m, 16m, 17m, 18m and 20 m).
S204, the bulldozer 12 levels the material discharged to the outside 14 of the dump site in the step S203 to form a working platform of the dragline 17.
S205, repeating the step S202 to the step S204 until the dragline 17 is pushed to the end slope of the raw coal recovery operation area 2, and performing perforation operation on the high step to be thrown and blasted of the reverse pile mining operation area 1 by the drilling machine while performing operation in the step S201 to the step S204, wherein the raw coal recovery operation is performed on the coal mining equipment in the reverse pile mining operation area 1. The coal transporting equipment in the step S205 transports the raw coal through four coal feeding channels. The coal supply passage in the present invention refers to a passage through which the truck 19 transports raw coal upward from the slope bottom of the stope, that is, the truck 19 transports raw coal. The four coaling channels are a fourth coaling channel 504 and a fifth coaling channel 505 at the left end of the stope, and a sixth coaling channel 506 and a seventh coaling channel 507 at the right end of the stope, respectively. The fourth coal feeding passage 504 and the seventh coal feeding passage are respectively positioned at the leftmost end and the rightmost end of the stope, the fifth coal feeding passage 505 is positioned near the inner side of the fourth coal feeding passage 504, and the sixth coal feeding passage 506 is positioned near the inner side of the seventh coal feeding passage 507. The fourth coaling channel 504 and the seventh coaling channel 507 are distributed in bilateral symmetry about the central line of the stope, the fifth coaling channel 505 and the sixth coaling channel 506 are distributed in bilateral symmetry about the central line of the stope, and the four coaling channels are arranged in bilateral symmetry in pairs, so that the operation tasks of all the areas can be completed simultaneously in the reverse-pile mining operation area 1 and the raw coal recovery operation area 2 each time, and the next operation area can be entered smoothly, and the increase of the allocation of the field operation time and the management difficulty of mutual matching among the areas are avoided.
S3, when the raw coal recovery operation of the reverse-heap mining operation area 1 in the step S2 is finished, all the other parts of coal mining equipment are sequentially moved to the coal face of the raw coal recovery operation area 2, the throwing blasting is carried out after the perforating charging of the rock high step 8 to be thrown and blasted in the reverse-heap mining operation area 1 is finished, a throwing blasting explosive pile 11 is obtained, the operations of the step S1 and the step S2 are repeated, and the step S3 specifically comprises the following steps:
s301, before the dragline 17 is pushed to the middle of the stope, the raw coal recovery operation of the reverse-stacking mining operation area 1 is finished, the coal mining equipment is moved to the coal face of the raw coal recovery operation area 2, and the throwing blasting is carried out after the perforating and charging of the rock high step 8 to be thrown and blasted in the reverse-stacking mining operation area 1 is finished, so that the throwing blasting explosive pile 11 is obtained.
S302, the throw blasting heap 11 in step S301 is operated according to the operation method from step S202 to step S205. Thus, the whole stope forms the working flows of circular throwing blasting, moving of the dragline 17, stripping of the dragline 17, coal mining of coal mining equipment, moving of the dragline 17 and throwing blasting. During the whole operation process, the dragline 17 does not need to bypass the waste dump 6 and only needs to move in the working face.
Example 2
The dragline 17 is widely applied as a domestic large-scale opencast mine, but when the dragline 17 is piled upside down, the dragline 17 needs to bypass the dump 6 and be moved between two mining areas, the total time and the total distance spent by the movement of the dragline 17 are too large, and seven channels which need to be reserved also greatly occupy the disposal space of the dump 6. Compared with the running method in the prior art, the running method has the following technical effects:
(1) the total length of a stope working line served by the current dragline 17 is about 2300m, and the total annual propelling length is about 9200m, but after the walking mining method disclosed by the invention is adopted, the invalid walking time is reduced by more than 44 hours, and the invalid moving distance is reduced by more than 9200 m.
(2) After the walking mining method is adopted, three channels and the walking channel of the dragline 17 reserved in the refuse dump 6 are saved, and the refuse discharging space is greatly increased.
(3) After the walking mining method is adopted, the auxiliary engineering quantity of cable moving, walking channel construction, maintenance and the like is reduced, and the stripping cost is greatly saved.
In conclusion, the circulating-traveling mining method provided by the invention changes the existing 8-shaped traveling track of the dragline 17 into the method of directly moving the dragline in the working surface by changing the traveling method of the dragline 17, and does not need to reserve the channel outlet and channel inlet channels when the dragline 17 is moved, so that the original seven channels are reduced to four channels in the method, the time spent by the dragline 17 in moving and the moving distance are greatly reduced, and meanwhile, the three reduced channels also greatly increase the disposal space of the dump 6, thereby being beneficial to improving the overall mining efficiency of a mine enterprise and reducing the mining cost.
The above description is only exemplary of the invention and should not be taken as limiting the invention, as any modification, equivalent replacement, or improvement made within the spirit and principle of the invention is intended to be covered by the appended claims.
Claims (8)
1. A circulating walking operation method for a working surface of a dragline of an opencast coal mine is characterized by comprising the following steps:
s1, dividing the stope into a reverse-stacking mining operation area and a raw coal recovery operation area;
s2, performing reverse pile operation on the raw coal mining operation area in the step S1, then starting the raw coal mining operation on the coal seam exposed out of the raw coal mining operation area by a part of coal mining equipment, and simultaneously performing perforation operation on the rock high steps of the reverse pile mining operation area in the step S1;
the step S2 specifically includes the following steps:
s201, perforating and charging in a raw coal recovery operation area, and then carrying out throwing blasting to obtain a throwing blasting explosive pile, wherein the throwing blasting explosive pile comprises an upper layer and a lower layer;
s202, pushing part of materials in the upper layer of the blasting stack in the step S201 to the outer side of the working face to form an expansion step;
s203, the dragline is moved towards the inner side of the working face of the raw coal mining operation area and pushed along the inner side of the working face to the end slope, only the materials on the inner side of the working face are dumped to the outer side of a refuse dump during dumping operation, and the materials on the expanded step are not processed;
s204, leveling the materials discharged to the outer side of the refuse dump in the step S203 by the bulldozer to form a dragline work platform;
s205, repeating the step S202 to the step S204 until the dragline is pushed to the end slope of the raw coal recovery operation area, wherein the drilling machine performs perforating operation on a high step to be thrown and blasted in the reverse pile mining operation area while the operation of the step S201 to the step S204 is performed, and the coal mining equipment performs raw coal recovery operation in the reverse pile mining operation area;
raw coal mined by the coal mining equipment in the step S205 is transported through four coal feeding channels;
s3, when the raw coal recovery operation of the reverse-heap mining operation area in the step S2 is finished, the other part of coal mining equipment is moved to the coal face of the raw coal recovery operation area, the rock to be subjected to throwing blasting in the reverse-heap mining operation area is subjected to throwing blasting after the high-step perforating charge is finished, a throwing blasting pile is obtained, and the steps S1 and S2 are repeated.
2. The method of claim 1, wherein step S3 comprises the steps of:
s301, before the dragline is pushed to the middle of a stope, the raw coal recovery operation of a reverse-stacking mining operation area is finished, the coal mining equipment is moved to a coal mining working face of the raw coal recovery operation area, and the rock to be thrown and blasted in the reverse-stacking mining operation area is thrown and blasted after the high-step perforating charge of the rock is finished, so that a throwing blasting pile is obtained;
s302, the throwing blasting explosive in step S301 is operated according to the operation method of steps S202 to S205.
3. The method of claim 1, wherein the line lengths of the reverse side mining operation area and the raw coal extraction operation area in step S1 are equal.
4. The method for the circulating operation of the working face of the dragline for the open pit coal mine according to claim 1, wherein the distance for pushing part of the materials in the upper layer of the blasting pile to the outer side of the working face in the step S202 is 15.6m, and the width of the formed expanding step is 25-40 m.
5. The method of claim 1, wherein the distance of the dragline to the inner side of the working face of the coal mining operation in step S203 is 10 to 20 m.
6. The method of claim 1, wherein the four coaling paths are a fourth coaling path and a fifth coaling path at the left end of the stope, and a sixth coaling path and a seventh coaling path at the right end of the stope.
7. The method of claim 6, wherein the fourth coaling channel and the seventh coaling channel are located at the leftmost end and the rightmost end of the stope, respectively, the fifth coaling channel is located adjacent to the inner side of the fourth coaling channel, and the sixth coaling channel is located adjacent to the inner side of the seventh coaling channel.
8. The method of claim 7, wherein the fourth and seventh coaling channels are symmetrically positioned about the centerline of the stope, and wherein the fifth and sixth coaling channels are symmetrically positioned about the centerline of the stope.
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| CN110700837A (en) * | 2019-11-29 | 2020-01-17 | 神华准格尔能源有限责任公司 | Dragline operation method |
| CN113047840B (en) * | 2021-04-27 | 2023-06-27 | 车兆学 | Stripping semi-continuous reverse pile process for open coal mine |
| CN116025357B (en) * | 2022-10-28 | 2023-09-05 | 国能经济技术研究院有限责任公司 | Operation method of temporary connection channel of dragline mining process |
| CN115726785B (en) * | 2022-10-28 | 2023-07-21 | 国能经济技术研究院有限责任公司 | Operation method for reserving walking channel in dragline mining process |
| CN115977642B (en) * | 2022-10-28 | 2023-08-29 | 国能经济技术研究院有限责任公司 | Double working surface back and forth moving and pile-reversing operation method of bucket-pulling shovel |
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