Intelligent steering method for opencast coal mine
By optimizing the layout of the working line and the planning of the spoil heap, and by adopting local ultra-short working line push, support-type pseudo-inclined spoil heap, and coordinated spoil heap in adjacent mining areas, the problems of uneven internal spoil heap and increased transportation distance during the turning period of open-pit coal mines have been solved, thus achieving safe and efficient production and improved economic benefits.
Patent Information
- Application Number
- CN202511698187.1
- Authority / Receiving Office
- CN · China
- Patent Type
- Applications(China)
- Current Assignee / Owner
- Filing Date
- 2025-11-19
- Publication Date
- 2026-02-13
AI Technical Summary
During the transition period, open-pit coal mines face problems such as uneven internal dumping, insufficient dumping space, and increased hauling distance and elevation difference, resulting in high production costs, low efficiency, and reduced economic benefits.
By employing methods such as localized ultra-short working lines, optimized mining procedures, supported pseudo-inclined spoil heaps, and coordinated spoil heaps with adjacent mining areas, the layout of working lines and spoil heap planning are optimized to achieve full utilization of internal spoil heap space and shorten transportation distances.
It effectively solved key technical problems during the transition period of open-pit coal mines, achieving safe and efficient production, reducing production costs, and improving economic benefits.
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Figure CN121519937A_ABST
Abstract
Description
TECHNICAL FIELD
[0001] The present application belongs to the technical field of coal mining, and relates to an intelligent turning method for an open-pit coal mine. BACKGROUND
[0002] The open-pit coal mine of zoned mining has a problem of internal discharge balance during turning, that is, internal discharge is tight in the early stage, and the space of internal discharge is suddenly released in the late stage, which leads to problems such as insufficient utilization of internal discharge dump, increased occupation of external discharge, and difficult reclamation in the late stage.
[0003] During the production operation period under the adverse conditions of the open-pit mine currently turning from the first mining area to the second mining area, lagging in land acquisition, deepening of coal seams, and increasing of coal seam inclination, under the influence of these adverse conditions, the coal seam inclination in the southern first mining area and the second mining area is large, the slope is 10°-19°, and the working face gradually changes to a north-south advancing and transversely arranged (transverse mining) mode. During the advancing of the working face, there are problems such as difficulty in selecting and mining large equipment, large raw coal loss, low coal selection rate, and difficulty in exerting the efficiency of the equipment. After turning, the working line of the first mining area becomes shorter, the length of the transversely arranged working line is only 500-800 m, the length of the working line is shortened, the operation cycle of each link of production is accelerated, and the production of short working line, large depth, narrow working face, and fast advancing leads to problems such as difficulty in connecting each link of production, difficulty in exerting the efficiency of the equipment, reduction of exposed coal, and reduction of economic benefits of the open-pit mine. In addition, as the mining area is continuously advanced, the distance and the height difference will still have a trend of increasing, which leads to a sharp increase in the distance and the height difference of the open-pit mine during turning.
[0004] In view of the above problems, in order to reasonably deal with the problems encountered in the current production process, improve the economic benefits of the mine, and effectively reduce the production cost, it is necessary to carry out research on the layout of the working line and the reasonable planning of the dump, which aims to achieve the goals of ensuring the production connection of the open-pit mine, reducing the dumping distance, and improving the economic benefits through optimization of the mining procedure, adjustment of the working line layout, inclined base dumping, and expansion of the dump capacity. SUMMARY
[0005] In view of the above situation, in order to overcome the defects of the prior art, the technical scheme adopted by the present application is as follows: An intelligent turning method for an open-pit coal mine; characterized in that it comprises the following steps: (1) determining the turning advancing working line of the coal mine; (2) establishing a distance model to optimize the design of the working line; (3) constructing a backfold pseudo-inclination dump; (4) integrating adjacent mines to form a shared dump.
[0006] Further, in step (1), according to the recent raw coal production scale, mining status, topographic and geological data, the annual mining and dumping engineering quantity and the mining and dumping space relationship in the turning period of the coal mine are analyzed to determine the dumping space deficiency in the turning period before the turning; the mining procedure is optimized, the single side ultra-short working line of the first mining area is strongly pushed, and the mining area in the first mining area is realized in advance.
[0007] Further, after the single side working line of the first mining area is strongly pushed to the boundary, the turning horizontal mining into the second mining area is realized; the second mining area is turned into the third mining area again.
[0008] Further, in step (2), the working line arrangement of the stripping area in the southeast of the first mining area is optimized, and a working line calculation model in the southeast of the mine is established to calculate the haulage distance.
[0009] Further, according to the working line arrangement and the triangular characteristics, the working face transportation line is abstracted, the haulage distance calculation model of the working face moving pit line under different working line arrangements is established, and the haulage distance calculation method of different working line arrangements is provided.
[0010] Further, according to the established working face moving pit line haulage distance calculation model, combined with the material quantity of each flat stripping, the position of the dumping site, and the transportation line, the comprehensive haulage distance, the corresponding transportation cost, and the influence on the shovel arrangement of each scheme are calculated, and finally the working line arrangement of the southeast direction is determined.
[0011] Further, in step (3), for the inclined bottom plate dumping method, the north support type pseudo-inclined dumping is adopted to increase the dumping capacity of the west internal dumping site.
[0012] Further, the pseudo-inclination dumping method of the anticline utilizes the support force of the inclined bottom plate and the end slope, forms a triangular support structure by oblique dumping with the two slopes, and increases the stability of the dumping site in combination with the groove after blasting of the bottom plate.
[0013] Further, in step (4), the dumping of each open pit is comprehensively considered from the perspective of the open pit group, and the dumping sites of each mine in the group are planned uniformly; when an open pit in the group is insufficient in dumping space due to special geological conditions and objective factors, the dumping site sharing is formulated, and the space resources within the group range are fully utilized.
[0014] Further, the internal dumping site of the adjacent mine is used for dumping, the intermediate bridge connecting the dumping area and the stripping area is erected to shorten the haulage distance, and the overall dumping cost of the open pit group is reduced.
[0015] Compared with the prior art, the present application has the following beneficial effects: In order to solve the problems of uneven internal drainage, insufficient dumping space, increased transport distance and height difference during the turning of the open-pit mine, the local super-short working line is forced, the local internal drainage mining program is realized in advance, the local stripping working line is optimized, the support type pseudo-inclined dumping is used, and the adjacent mining areas are coordinated to solve the key technologies during the turning of the open-pit mine, and the safe and efficient production of the open-pit coal mine is realized. BRIEF DESCRIPTION OF DRAWINGS
[0016] Figure 1 is a method schematic diagram; Figure 2 is a mining area advancing schematic diagram; Figure 3A is a working line arrangement schematic diagram before optimization; Figure 3B is a working line arrangement schematic diagram before optimization; Figure 4 is a pseudo-inclined dumping schematic diagram in an anticline area; Figure 5 is a coordinated dumping schematic diagram. DETAILED DESCRIPTION
[0017] The present application will be further described below in connection with the accompanying drawings and examples, and the modes of the present application include but are not limited to the following examples.
[0018] In order to make the purpose, technical scheme and advantages of the present application more clear and explicit, the present application will be further described in detail below in connection with specific examples and with reference to the accompanying drawings. The same parts are denoted by the same reference numerals. It should be noted that the terms "front", "back", "left", "right", "up" and "down" used in the following description refer to the directions in the drawings. The terms "inner" and "outer" used refer to the directions towards or away from the geometric center of a particular part.
[0019] Figure 1 is a schematic diagram of an intelligent turning method of an open-pit coal mine in a specific embodiment of the present application. The method comprises: (1) determining the coal mine turning advancing working line; According to the recent raw coal production scale, mining status, topographic and geological data, the relationship between the annual mining and dumping engineering quantity and the mining and dumping space during the coal mine turning period is analyzed, the internal drainage space deficiency during the pre-turning period is determined, the mining program is optimized, the northern super-short working line is forced, and the northern internal drainage is realized in advance.
[0020] For example, Figure 2As shown, by analyzing the relationship between the length of the strong push working line in the north, the stripping engineering quantity and the dumping space, an advanced scheme is proposed with F12 fault in 11 coal as the boundary to advance the first mining area in the north quickly, and to realize the boundary of the local whole, so as to realize the internal dumping in the north. The south is used to make up for the insufficient output in the north, and slowly pushes forward. After the boundary in the north is pushed, the turning horizontal mining into the second mining area is realized. The effective internal dumping space in the north is increased, and the tense situation of dumping space is relieved. The subsequent second mining area turns into the third mining area again.
[0021] (2) Establish a transport distance model to optimize the design of the working line; The stripping working line arrangement mode in the southeast of the first mining area is optimized, the working line calculation model in the southeast of the mine is established to calculate the transport distance of the mine, and the optimized scheme is obtained to save the transport distance and save the transportation cost, reduce the cost and increase the benefit.
[0022] As shown in Figure 3A , 3B , according to the working line arrangement combined with the triangular characteristics, the working face transport line is abstracted, the transport distance calculation model of the working face moving pit line under different working line arrangement conditions is established, and the transport distance calculation method of different working line arrangement is provided. According to the established working face moving pit line transport distance calculation model, combined with the material quantity of each flat disc stripping, the position of the dumping site, the transport line, the comprehensive transport distance of each scheme, the corresponding transportation cost, and the influence on the shovel arrangement are calculated, and finally the working line arrangement of the southeast direction is determined as the optimal scheme.
[0023] (3) Build a backfolding pseudo-inclination dumping; For the inclined floor dumping method, the north support type pseudo-inclined dumping is adopted to increase the west internal dumping site dumping capacity.
[0024] As shown in Figure 4 , when the open pit encounters the backfolding structure, the coal seam floor inclination increases sharply, and the dumping space is limited. The backfolding pseudo-inclination dumping method is optimized and designed. This dumping method uses the support force of the inclined floor and the end slope to form a stable triangular support structure by oblique dumping with the two slopes, and increases the stability of the dumping site combined with the groove after blasting the floor, so as to meet the dumping and solve the backfolding area dumping.
[0025] (4) Integrate adjacent mines to form a shared dumping site; Taking advantage of the south-north adjacent conditions of Anjialing Mine and Antaibao Mine, the adjacent mine area is coordinated to solve the dumping space.
[0026] From the perspective of open pit group, the dumping of each open pit is integrated, and the dumping sites of each mine in the mine group are planned uniformly. When a certain open pit in the mine group is insufficient due to special geological conditions and other objective factors, a dumping site sharing scheme is developed to make full use of the space resources within the scope of the mine group, such as Figure 5As shown, by utilizing the internal spoil heaps of adjacent mines for spoil disposal and constructing intermediate bridges connecting the spoil disposal area and the stripping area, the transportation distance can be shortened, thereby reducing the overall spoil disposal cost of the open-pit mine complex.
[0027] To address the challenges of uneven internal dumping, insufficient dumping space, and increased haulage distance and elevation differences during the turnaround period in open-pit mines, the project employed several key technical solutions during the turnaround period at the Anjialing open-pit mine. These solutions included a strong push along an ultra-short working line in the north, early implementation of the northern internal dumping mining procedure, optimization of the southeastern stripping working line, pseudo-inclined dumping with support on the north side, and coordinated dumping with adjacent mining areas. The project's application at the Anjialing open-pit mine successfully navigated the difficult turnaround period, generating direct economic benefits of 134.8539 million yuan. The research findings, applied to the Anjialing mine's production process, effectively mitigated insufficient dumping space during the turnaround, improved the stability of dumping at the inclined base of the anticline area, shortened the haulage distance for stripped materials, and reduced fuel and tire consumption, resulting in significant social benefits. Furthermore, it provides advanced experience for addressing insufficient dumping space in mines with similar conditions in the future.
[0028] The project generated economic benefits: 1. The accelerated implementation of the ultra-short working line in the north released 36 million cubic meters of waste disposal space ahead of schedule, shortening the disposal and transportation distance by 600 meters. The unit price for self-operated transportation was based on... Calculation. Cost savings in production: 10,000 yuan. 2. Through optimization of the stripping work line, the discharge and transportation distance was shortened by 90.68m. A total of 136 million m³ of stripped material was discharged through this area. The unit price for self-operated transportation was based on... Calculations can save on production costs. 10,000 yuan. 3. The pseudo-inclined spoil heap with north-side support increases the spoil heap space in the west inner spoil heap by 15 million cubic meters, shortens the spoil disposal distance by 1,600 meters, and saves production costs: 4. Coordinated waste disposal with adjacent mining areas increases waste disposal space by 40 million m³, shortens waste disposal and transportation distance by 620 meters, and saves production costs. 10,000 yuan. Total: 134,853,900 yuan. This application provides a computer-readable storage medium storing a computer program thereon, which, when executed by a processor, implements the steps of the above-described intelligent steering method for open-pit coal mines.
[0029] Those skilled in the art will understand that all or part of the processes in the methods of the above embodiments can be implemented by a computer program instructing related hardware. The computer program can be stored in a non-volatile computer-readable storage medium, and when executed, it can include the processes of the embodiments of the methods described above. Any references to memory, storage, databases, or other media used in the embodiments provided in this application can include at least one of non-volatile and volatile memory. Non-volatile memory can include read-only memory (ROM), magnetic tape, floppy disk, flash memory, or optical storage, etc. Volatile memory can include random access memory (RAM) or external cache memory. By way of illustration and not limitation, RAM can be in various forms, such as static random access memory (SRAM) or dynamic random access memory (DRAM), etc.
[0030] In the description of this specification, the references to terms such as "some embodiments," "other embodiments," "ideal embodiments," etc., refer to specific features, structures, materials, or characteristics described in connection with that embodiment or example that are included in at least one embodiment or example of this application. In this specification, the illustrative descriptions of the above terms do not necessarily refer to the same embodiments or examples.
[0031] The technical features of the above embodiments can be combined in any way. For the sake of brevity, not all possible combinations of the technical features in the above embodiments are described. However, as long as there is no contradiction in the combination of these technical features, they should be considered to be within the scope of this specification.
[0032] The embodiments described above are merely illustrative of several implementation methods of this application, and while the descriptions are relatively specific and detailed, they should not be construed as limiting the scope of the invention patent. It should be noted that those skilled in the art can make various modifications and improvements without departing from the concept of this application, and these all fall within the protection scope of this application. Therefore, the protection scope of this patent application should be determined by the appended claims.
Claims
1. An intelligent steering method for open-pit coal mines; characterized in that: Includes the following steps: (1) Determine the coal mine's turning and propulsion work line; (2) Establish a transportation distance model to optimize the design and layout of the work line; (3) Constructing a pseudo-inclination slope for soil removal; (4) Integrate neighboring mines to establish a shared spoil heap.
2. The intelligent steering method for open-pit coal mines according to claim 1, characterized in that, In step (1), based on the recent raw coal production scale, mining status, and topographic and geological data, the annual mining and drainage engineering volume and mining and drainage space relationship during the coal mine's transition period are analyzed to determine the amount of internal drainage space shortage in the early stage of transition; the mining procedure is optimized by using a single-sided ultra-short working line to push the first mining area to achieve internal drainage in the first mining area in advance.
3. The intelligent steering method for open-pit coal mines according to claim 2, characterized in that, After the single-sided working line of the first mining area is pushed to the boundary, it turns to enter the second mining area through horizontal mining; the second mining area then turns again to enter the third mining area.
4. The intelligent steering method for open-pit coal mines according to claim 2, characterized in that, In step (2), the layout of the stripping work line in the southeastern part of the first mining area is optimized, and a calculation model of the southeastern work line of the mine pit is established to calculate the mine pit haulage distance.
5. The intelligent steering method for open-pit coal mines according to claim 4, characterized in that, Based on the working line layout and the characteristics of triangles, the working face transportation route is abstracted to establish a transportation distance calculation model for the moving pit line under different working line layouts, and a transportation distance calculation method for different working line layouts is provided.
6. The intelligent steering method for open-pit coal mines according to claim 5, characterized in that, Based on the established working face moving pit line haul distance calculation model, combined with the amount of stripped material on each flatbed and the location of the spoil disposal site and the transportation route, the comprehensive haul distance, corresponding transportation costs, and impact on the electric shovel layout of each scheme are calculated, and the working line layout of pushing diagonally to the southeast is finally determined.
7. The intelligent steering method for open-pit coal mines according to claim 2, characterized in that, In step (3), for the inclined bottom plate soil dumping method, the north side support type pseudo-inclined soil dumping is adopted to increase the soil dumping capacity of the west inner soil dumping site.
8. The intelligent steering method for open-pit coal mines according to claim 7, characterized in that, The pseudo-inclination soil dumping method utilizes the supporting force of the inclined bottom plate and end side to form a triangular support structure by diagonally dumping soil with the two sides. Combined with the groove created after blasting the bottom plate, the stability of the soil dumping site is increased.
9. The intelligent steering method for open-pit coal mines according to claim 2, characterized in that, In step (4), the spoil disposal of each open-pit mine is integrated from the perspective of the open-pit mine cluster. The spoil disposal sites of each mine within the mine cluster are planned in a unified manner. When a certain open-pit mine in the mine cluster has insufficient disposal space due to special geological conditions and objective factors, a spoil disposal site sharing mechanism is formulated to make full use of the space resources within the mine cluster.
10. The intelligent steering method for open-pit coal mines according to claim 9, characterized in that, The shared spoil heap utilizes the internal spoil heaps of adjacent mines for spoil disposal, and the construction of intermediate bridges connecting the spoil disposal area and the stripping area shortens the transportation distance and reduces the overall spoil disposal cost of the open-pit mine complex.