Coal and associated minerals coordinated, synergistic and zoned staggered mining method

Abstract

The application discloses a kind of coal and associated minerals coordinated, coordinated and co-mineral partition staggered coordinated mining method, belong to mining technical field, comprising the following steps: S1, comprehensive analysis obtains the contradiction point of coal and associated minerals mining;S2, for the contradiction point of coal and associated minerals mining, reasonable partition, staggered mining;S3, coal and associated minerals resources space is divided into three parts of superimposed area, protection zone and normal mining area;S4, by mineral resources value etc. Determine the mining time sequence of each partition;The application breaks through the traditional coal mining only for single mineral, does not consider the time sequence and the drawbacks of space avoidance of multi-mineral mining, with "partition staggered" as the core concept, proposes the principle of coal and associated minerals "partition staggered" coordinated mining, which can effectively solve the contradiction of coal and associated minerals mining, also develops a complete set of method for coal and associated minerals coordinated, coordinated and co-mining, which can greatly improve resource recovery rate and reduce mineral resources waste.

Description

TECHNICAL FIELD

[0001] The present application relates to the technical field of mine exploitation, and particularly relates to a partition staggered coordination mining method for coordinated, cooperative and co-mining of coal and associated minerals. BACKGROUND

[0002] Coal measures, namely coal-bearing rock series, are sequences of sedimentary rocks formed in a certain geological history period, closely related in genesis, and containing coal seams or carbonaceous rock layers. In addition to coal, 28 kinds of strategic minerals, such as aluminum, gallium, uranium and coalbed methane, are also present in numerous coal-bearing rock series in China. Among them, there are as many as 22 kinds of strategic metal minerals (key metals). These key metals have unique material properties and provide valuable material basis for the stable development of emerging industries such as new energy, new materials, high-end manufacturing and electronic information, and key fields such as aerospace and national defense. They are important strategic resources in China. With the rapid development of high-tech and emerging industries, the demand for strategic metal minerals will grow rapidly in the future, while the reserves of these minerals in nature are relatively small, and there is a high supply risk. The reserves of coal measures associated minerals in China are large and diverse. If coal and associated minerals can be mined together at a high recovery rate, it can not only ensure the safe supply of coal resources, but also ensure the stable supply of strategic mineral resources, reduce national security risks, and is of great significance to the security of China's resources.

[0003] At present, traditional coal mines in China only mine coal resources, and less consider coal measures associated minerals. However, coal and associated minerals are superimposed in space, have large differences in occurrence and mining methods, and the strata movement and fluid migration of each mineral mining affect each other's normal mining. If not planned and coordinated, it will cause serious waste of resources and a series of ecological and environmental problems. In recent years, the contradiction between coal and associated minerals mining in some domestic mining areas has become increasingly prominent. For example, the contradiction between coal mining and coal measures bauxite mining in Lvliang, Shanxi, and the contradiction between coal mining and uranium mining in Ordos Basin and Yili Basin. Coal-aluminum and coal-uranium are typical coal measures associated strategic metal minerals. Among them, coal measures associated bauxite resources are mostly in the form of coal above and bauxite below. After the lower bauxite is mined, the strata movement causes the destruction of the upper coal seam, resulting in the inability to mine the coal seam and causing huge resource losses. Sandstone-type uranium mines in Ordos Basin and Yili Basin are mostly present above the coal seam and are mostly mined by drilling and leaching. The pre-mining of coal destroys the overlying strata structure and groundwater system, and the large amount of drainage causes the water level of the ore-bearing aquifer to drop significantly, destroying the basic hydrogeological conditions for in-situ leaching of uranium mines, causing waste of uranium resources. At the same time, radioactive substances will also enter the coal mine stope along the water-conducting fissures, causing huge radioactive pollution to coal mine workers and the ecological environment, and seriously affecting the safety production of coal mines.

[0004] This demonstrates that current traditional mining methods targeting a single mineral are insufficient to coordinate the mining relationships between multiple minerals and cannot resolve the conflict between coal and associated minerals in China. Therefore, it is urgent to overcome the shortcomings of traditional mining planning theories and propose a new method that can effectively resolve the conflict between coal and associated minerals, thereby significantly reducing the waste of strategic resources, mitigating the potential risks to national security and economic development caused by disruptions in the strategic mineral resource supply chain, and providing technological support for ensuring the secure supply of my country's strategic mineral resources. Summary of the Invention

[0005] To address the shortcomings of traditional single-mining methods that cannot resolve the conflict between coal and associated mineral mining, this invention proposes a zoned, staggered-time coordinated mining method for coal and associated minerals. Based on the core concept of "zoned, staggered-time mining" and the design principles of "spatial separation, temporal staggering, prioritizing urgent needs, comprehensive utilization, and reasonable avoidance," this method coordinates the mining relationships between various minerals by comprehensively planning the resource mining layout, timing, scale, and structure. Then, it implements zoned, staggered-time mining, effectively resolving the conflict between coal and associated mineral mining, significantly reducing resource waste, and achieving coordinated mining of coal and associated resources.

[0006] To achieve the above objectives, the present invention provides the following technical solution:

[0007] A method for coordinated, synergistic, and joint mining of coal and associated minerals, comprising the following steps:

[0008] S1. Based on the occurrence characteristics and distribution range of coal and associated minerals, the types of associated minerals and the mining methods used, the contradictions in the mining of coal and associated minerals are identified through a comprehensive analysis from two aspects.

[0009] S2. In response to the contradictions in the mining of coal and associated minerals, the design principles are spatial separation, staggered timing, prioritizing urgent needs, comprehensive utilization, and reasonable avoidance. The mining areas for coal and associated minerals should be rationally divided and mined at different times. When spatially dividing minerals, the layout, timing, scale, and structure of resource mining should be taken into account.

[0010] S3. Based on the above analysis, it is proposed to divide the space of coal and associated mineral resources into three parts: overlapping area, protection area and normal mining area.

[0011] S4. For the mineral resources in each zone, determine the mining sequence of each zone based on the strategic demand attributes, occurrence characteristics, mining impact, and economic value of the mineral resources.

[0012] S5. Based on the reasonable zoning determined in step S3 and the mining sequence of each zone determined in step S4, coal and associated minerals that are stacked on top of each other can be developed in an orderly manner.

[0013] As a further scheme of the present application: in the S1 step, the two aspects of the comprehensive analysis are:

[0014] (3) the size of each distribution area of the associated minerals, the occurrence horizon, and the relative spatial relationship therebetween;

[0015] (4) the mining method used for the coal seam and the mining method used for the associated minerals is determined, and the respective technical conditions required for the two mining methods and the adverse effects caused by the two mining methods are analyzed, further according to the distribution area and the relative spatial relationship of the coal and the associated minerals, it is analyzed which area of the minerals will be adversely affected after the mining of the other mineral, resulting in the technical conditions for the mining of the minerals in this area being destroyed and unable to be normally mined, and finally the contradiction point of the mining of the coal and the associated minerals is summarized.

[0016] As a further scheme of the present application: in the S2 step, when the minerals are spatially zoned, the resource exploitation layout, timing, scale and structure should be overall planned; when the resource exploitation timing of staggered mining is determined, the strategic demand attribute, occurrence characteristics, mining influence, economic value and other conditions of the resources should be comprehensively considered; the core judgment basis for whether the regional division and timing determination are reasonable is whether the design can solve or avoid the contradiction point of the mining of the coal and the associated minerals, and achieve the purpose of the coordinated mining of the coal and the associated minerals.

[0017] As a further scheme of the present application: in the S3 step, the superimposed area is the mineral occurrence area spatially overlying the coal seam and the associated minerals; the protection area is the area not planned to be mined, which is used as an isolation buffer area between the superimposed area and the normal mining area, and this area can effectively reduce the influence of the mining of the coal seam and the associated minerals on each other; the normal mining area is the area outside the protection area, and since the protection area is used as a buffer, the mining activities can be normally carried out in this area.

[0018] As a further scheme of the present application: the range of the protection area is determined according to the lateral boundary range of the water flowing fractured zone of the overlying strata of the mining face, the protection area is used as an intermediate buffer area between the superimposed area and the normal mining area, and is affected by the strata movement of the normal mining area on one side and the mining activities of the superimposed area on the other side, therefore, the range of the protection area needs to be greater than the sum of the influence ranges of the normal mining area and the superimposed area, so as to prevent the fractures of the normal mining area and the superimposed area from penetrating each other, and to prevent the migration and diffusion of mine water disasters and toxic and harmful gases.

[0019] As a further scheme of the present application: the strata movement angle of the normal mining area is δ, the distance between the coal seam and the upper associated mineral occurrence horizon is h, the influence range of the normal mining area is W1, the safety coal pillar width is W2, and the lateral development range of the water flowing fractured zone of the superimposed area is W3, then the range of the protection area W = W1+W2+W3 = h / tanδ+W2+W3.

[0020] As a further scheme of the present application: the safety coal pillar width W2 is 5-10 times the coal seam mining height, a large number of field engineering practices show that the strata movement angle δ and the lateral development range W3 of the water-conducting fracture are influenced by the engineering geology, mining method and mining parameters, and need to be determined comprehensively according to the field engineering geology and mining conditions by using engineering analogy, field measurement and numerical analysis.

[0021] As a further scheme of the present application: in step S4, the consideration range of the mineral resource value includes the strategic attribute of the mineral resource, whether it is urgently needed, and economic value, and finally determines whether to preferentially mine the upper mineral or the lower mineral.

[0022] As a further scheme of the present application: in step S4, the mineral in the protection area is not mined, because the mineral in the protection area and its surrounding rock structure fissure are relatively developed, the surrounding rock structure stability decreases, the original occurrence conditions will change, and the mining difficulty is large, if the mineral resource in the protection area is recovered, it needs to be comprehensively evaluated in terms of safety, technology and economy, and then can be carried out.

[0023] As a further scheme of the present application: the mining sequence of each subarea in step S4 is determined by the strategic demand attribute, occurrence characteristics, mining influence and economic value of the mineral resource is replaced by the mining mode, and the mining area needs to be redefined when the mining sequence of each subarea is determined by the mining mode.

[0024] As a further scheme of the present application: the mining mode includes coordinated mining, cooperative mining and common mining mode.

[0025] As a further scheme of the present application: the coordinated mining mode is according to the principle of "spatial avoidance and mutual non-influence", and the mineral occurrence area is divided into "coal mining area", "common associated mineral mining area" and "coordinated mining protection area" three parts according to the principle of "spatial avoidance and mutual non-influence"; in order to avoid the influence of mining activities on each other, the mineral in the coordinated mining protection area is not mined as a buffer area of the coal mining area and the common associated mineral mining area, and the coal mining area and the common associated mineral mining area are simultaneously mined in the direction away from each other with the coordinated mining protection area as the boundary.

[0026] As a further scheme of the present application: the cooperative mining mode divides the "preferential mining area" and the "lagging mining area" according to the principle of "time sequence staggered, utilizing strata movement", and determines the reasonable mining method and mining layout for mining, and promotes the mining of the "lagging mining area" mineral by utilizing the strata movement caused by the mining of the "preferential mining area" mineral, so as to achieve the effect of cooperative mining of coal and associated minerals.

[0027] As a further scheme of the present application: the "co-mining mode" is for the same-body associated minerals, and the coal production system can be shared to mine the coal and the same-body associated minerals together.

[0028] As a further scheme of the present application: the "co-mining mode" is for the different-body associated minerals, and needs to be extended to connect the two sets of production systems of the coal and the different-body associated minerals, and to share the development well or roadway or transportation system to mine the minerals.

[0029] Compared with the prior art, the present application has the following beneficial effects:

[0030] (1) The present application breaks through the drawbacks of the traditional coal mining which only targets single mineral and does not consider the time sequence and spatial avoidance of multi-mineral mining, and proposes the principle of "zoning and staggered time" for the coordinated mining of coal and associated minerals, which can effectively solve the contradiction between coal and associated minerals mining.

[0031] (2) The traditional coal mining only targets single mineral, and does not consider the superimposed influence of strata movement in multi-mineral mining, and the present application takes the design principles of spatial division, time sequence staggering, urgent first, comprehensive utilization, and reasonable avoidance, and makes overall planning of resource mining layout, time sequence, scale and structure, and formulates a complete method for the coordinated, cooperative and co-mining of coal and associated minerals, which can greatly improve the resource recovery rate and reduce the waste of mineral resources. BRIEF DESCRIPTION OF DRAWINGS

[0032] Figure 1 is the mining schematic diagram provided by embodiment 1 of the present application.

[0033] Figure 2 is the mining schematic diagram provided by embodiment 2 of the present application.

[0034] Figure 3 is the mining schematic diagram provided by embodiment 3 of the present application.

[0035] Figure 4 is the mining schematic diagram provided by embodiment 4 of the present application.

[0036] Figure 5 is the mining schematic diagram provided by embodiment 5 of the present application.

[0037] Figure Labels and Annotations: 1-Uranium ore body, 2-Ore-bearing aquifer, 3-Coal seam, 4-Lower aquifer, 5-Upper aquifer, 6-Water level settling funnel, 7-Normal mining area, 8-Protected area, 9-Overlapping area, 10-Uranium mining area, 11-Injection well, 12-Pumping well, 13-Monitoring well, 14-Radioactive pollutant, 15-Bauxite, 16-Coal seam mining area, 17-Bauxite mining area, 18-Coordinated mining protected area 19-Coal seam mining direction, 20-Bauxite mining direction, 21-Bauxite co-mining area, 22-Coal seam decompression area, 23-Kaolinite, 24-Coal mining machine, 25-Hydraulic support, 26-Front scraper conveyor, 27-Rock release port, 28-Kaolinite crushing area, 29-Rear scraper conveyor, 30-Compacted stabilization area, 31-Gradually compacted area, 32-Coal seam mining direction, 33-Bauxite mining direction. Detailed Implementation

[0038] The technical solution of this patent will be further described in detail below with reference to specific embodiments.

[0039] Example 1

[0040] like Figure 1 As shown, taking a sandstone-type uranium deposit as an example, the uranium ore body and coal seam are spatially superimposed, with the coal seam located approximately 50m below the uranium-bearing aquifer. The mining of the lower coal seam and the upper uranium ore present significant challenges, and improper handling could lead to serious waste of strategic mineral resources and radioactive contamination. Therefore, it is necessary to implement "zoning and staggered mining" of the coal and associated sandstone-type uranium deposits. The operational steps are as follows:

[0041] (1) The comprehensive analysis of the occurrence characteristics, distribution range and mining method of coal and symbiotic sandstone type uranium deposit is carried out to find the conflict points of coal and uranium mining. Uranium ore body 1 occurs in the ore-bearing aquifer 2, and the lower and upper aquifuges 4 and 5 provide good geological conditions for the formation and mining of uranium deposit. At the same time, the coal seam 3 occurs in the lower part of the uranium ore body 1 about 50 m. At present, most of the sandstone type uranium deposits are mined by leaching method. After the leaching liquid is injected into the injection hole 11 and fully reacts with the uranium ore body 1, it is extracted through the liquid extraction hole 12 to realize the in-situ leaching of uranium. This method requires that the ore-bearing aquifer 2 must have a high enough water level to meet the technical needs of leaching mining. The lower coal seam 3 is mined by longwall mining, and the whole height is mined at one time, and the goaf is treated by full caving method. Through further analysis of the two mining methods of uranium and coal seam, it is found that the prerequisite for leaching mining of uranium is that the uranium-bearing aquifer 2 needs to have a certain pressure water level, and the lower and upper aquifuges 4 and 5 ensure that the uranium-bearing aquifer 2 can maintain a normal mineable water level. The stability of the lower and upper aquifuges 4 and 5 is the basis for ensuring the normal leaching mining of uranium. However, the mining of the lower coal seam 3 will cause the overburden movement, which will destroy the stability of the lower aquifuge 4 under the uranium-bearing aquifer, leading to the continuous decline of the water level in the uranium-bearing aquifer and the inability to mine the uranium. At the same time, if the upper uranium ore body 1 is mined by leaching method first, and then the coal seam is mined, the blind mining without prior planning will lead to the fracture connection of the overburden of the post-mining area and the uranium-bearing aquifer, so that the radioactive pollutants 14 in the uranium mining area 10 enter the coal mine goaf along the fracture zone, causing radioactive pollution and seriously endangering the health of the workers in the coal mining area. Therefore, through the above comprehensive analysis, it is found that there are two conflict points of coal and symbiotic sandstone type uranium mining: ① the mining of the lower coal seam 3 will lead to the destruction of the lower aquifuge 4, and the low water level in the uranium-bearing aquifer 2 will lead to the inability to leach mine the uranium ore body 1; ② the radioactive pollutants 14 produced by the leaching mining of the upper uranium ore body 1 will enter the coal mine goaf along the overburden fracture produced by the mining of the coal seam 3, causing serious radioactive pollution.

[0042] (2) According to the conflict points of coal and symbiotic sandstone type uranium mining analyzed in step (1), the layout, time sequence, scale and structure of resource mining are planned, and the design principles of "spatial division, time sequence stagger, urgent needs first, comprehensive utilization and reasonable avoidance" are followed. Since the spatial occurrence range of coal seam 3 is wider than that of uranium ore body 1, the lower coal seam occurrence area is divided into superimposed area 9, protection area 8 and normal mining area 7. The range of protection area 8 is W = W1 + W2 + W3 = h / tanδ + W2 + W3, which ensures that the boundary of water level depression cone 6 formed in the normal mining area 7 is located outside the uranium mining area 10, so that the groundwater discharge in the uranium mining area 10 is less than the recharge, and the water level in the uranium-bearing aquifer is maintained within the uranium mineable range.

[0043] (3) Considering the strategic demand attribute, occurrence characteristics, mining influence, economic value and other conditions of resources, the mining time sequence of each region is determined. Since there is no uranium ore body in the overburden strata of the coal seam in the normal mining area and there is a certain range of protection area 8 as a buffer between the uranium ore body 1, the influence on the uranium ore body is small, the recoverable degree and safety are high, therefore the priority of coal seam mining in the normal mining area 7 is the highest.

[0044] (4) Since the protection area 8 is a isolation buffer zone between the normal mining area 7 and the superimposed area 9, the mining priority of the protection area 8 is the lowest, and the difficulty of coal seam mining in the protection area is large, the range of the coal seam is much smaller than that of the normal mining area, therefore the coal seam 3 in the protection area 8 is no longer recovered.

[0045] (5) There are coal seam 3 and uranium mine 1 in the superimposed area 9, because the normal mining area 7 has a large range of coal seam that can be normally mined and the uranium ore body is all located in the superimposed area, and the uranium mine has a high strategic attribute, therefore the uranium mining priority of the superimposed area is higher than that of the coal seam in the superimposed area, after the uranium mining in the uranium mining area 10 is completed, the coal seam in the superimposed area can be mined, but the fissure zone range of the overburden strata of the coal seam should be controlled below the uranium lower aquifer 4, and the fissure should not be connected to the uranium ore-bearing and water-bearing strata 2, otherwise it will cause serious radioactive pollution to the lower coal mine.

[0046] (6) By reasonably zoning the coal and symbiotic sandstone type uranium mine, and according to the order of normal mining area 7 coal seam→uranium mining area 10→superimposed area 9 coal seam, the mining contradiction of coal and symbiotic sandstone type uranium mine is solved, and the coal and uranium mine can be recovered with the maximum recovery rate.

[0047] Example 2

[0048] Reference Figure 2, The coal under bauxite is widely distributed in a certain mining area. The bauxite is developed about 30 m below the coal seam, with a gentle inclination and a thickness of about 3 m. Both the coal production enterprises and the bauxite production enterprises urgently need to carry out mineral exploitation, and the time sequence of exploitation is difficult to coordinate. At the same time, due to the overlying distribution of coal and bauxite, the lower bauxite mining may cause the overlying rock activity to damage the coal seam, resulting in step dislocation of the coal seam and unable to be normally mined. Therefore, the principle of "spatial avoidance and mutual non-interference" is adopted to select the coordinated mining mode for the rational partition mining of coal and bauxite. First, the overlying coal and bauxite occurrence area is divided into coal mining area 16, bauxite mining area 17 and coordinated mining protection area 18. Then, the coal seam is mined, and the junction between the divided coal mining area 16 and the coordinated mining protection area 18 is taken as the initial mining line to arrange the open-off cut, and the coal mining direction 19 is away from the coordinated mining protection area 18. The coal seam mining is carried out at the same time as the bauxite mining, and the junction between the divided bauxite mining area 17 and the coordinated mining protection area 18 is taken as the initial mining position, and the room-and-pillar mining method is selected for mining, and the bauxite mining direction 20 is opposite to the coal mining direction 19.

[0049] Example 3

[0050] Referring to Figure 3 , the coal and bauxite are overlying distributed in a certain mining area. The upper coal seam is identified as a outburst coal seam, and the bauxite is 50 m below the coal seam with a thickness of about 3 m. Due to the risk of coal and gas outburst in the upper coal seam, and the local mining enterprises have other reserve area resources to be mined, the overlying area resources are not in urgent need of mining. The principle of "time sequence staggered and utilizing rock activity" is adopted to select the coordinated development mode for the staggered mining of coal and bauxite. First, the mining time sequence is determined, and the lower bauxite is mined first, and then the upper coal seam is mined. The lower bauxite is mined by the room-and-pillar method with a mining thickness of 3 m, and the bauxite mining will not damage the integrity of the upper coal seam, ensuring the normal mining of the coal seam without being affected. After the bauxite in the bauxite coordinated mining area 21 is mined, the upper coal seam is relieved, and the corresponding area of the coal seam becomes a relieved area 22. The coal seam produces a large number of intra-layer fissures, and the permeability is greatly improved. The gas pressure in the coal seam is released, which can effectively prevent the occurrence of gas outburst accidents and improve the safety of subsequent coal mining.

[0051] Example 4

[0052] Referring to Figure 4 , the immediate roof of the coal seam in a certain mining area is kaolin, which has low strength and collapses with mining. Kaolin is a non-metallic mineral, which is mainly used for papermaking, ceramics and refractory materials. The upper kaolin 23 and the coal seam belong to the same body symbiotic mineral, which can be mined by using the coal production system. The specific implementation steps are as follows:

[0053] (1) Coal and kaolin mining face starts the coal cutter 24 and cuts coal along the longwall face.

[0054] (2) After the coal cutter 24 cuts coal, the front hydraulic support 25 is moved forward and the support plate is quickly opened.

[0055] (3) After the support is moved, the front scraper conveyor 26 is immediately pushed forward, and the front scraper conveyor 26 is ensured to be parallel to the coal wall.

[0056] (4) The rock release port 27 on the hydraulic support is opened, and the kaolin in the broken area 28 enters the rear scraper conveyor 29 through the rock release port 27.

[0057] (5) After the kaolin is released, the rock release port 27 is closed, and the rear scraper conveyor 29 is sequentially pulled and moved.

[0058] (6) Steps (2) to (5) are repeated until the mining is completed.

[0059] (7) The coal is transported by the front scraper conveyor 26, and the kaolin is transported by the rear scraper conveyor 29, and finally transported to the ground by the lifting system.

[0060] Example 5

[0061] Referring to Figure 5 , there is a bauxite layer at a depth of 50m below the coal seam in a certain mining area. The bauxite and coal are deposited in different horizons in the same mining area, belong to different symbiotic minerals, and the local mining enterprises have both coal and bauxite mining permits, so they can choose to mine coal and symbiotic bauxite by extending the development. According to the occurrence position of the coal seam and the bauxite, the mining sequence is determined, the upper coal seam is mined first, and then the lower bauxite is mined. The coal seam mining goaf can be divided into a compacted stable area 27 and a gradually compacted area 28. According to field observations, it takes about 6 months for the rock stratum to move to stability after coal mining, so the bauxite mining needs to lag behind the coal mining by more than 6 months, and the bauxite mining direction 30 is consistent with the coal seam mining direction 29. The coal mine uses a flat tunnel to develop, which can extend the original well to the bauxite level, and use trackless rubber-tyred vehicles to transport bauxite to the ground.

[0062] Working principle: The present application breaks through the traditional coal mining which only targets single mineral, does not consider the time sequence and space avoidance of multi-mineral mining, takes "zoning staggered time" as the core concept, considers resources, safety, environment and other factors, proposes the principle of "zoning staggered time" coordinated mining of coal and associated minerals; the traditional coal mining only targets single mineral, does not consider the superimposed influence of multi-mineral mining strata movement, the present application takes spatial division, time sequence staggering, urgent first, comprehensive utilization, reasonable avoidance as the design principle, coordinates the resource mining layout, time sequence, scale and structure, and proposes a complete method of coordinated, collaborative and co-mining of coal and associated minerals.

Claims

1. A method for zoned staggered coordinated mining of coal and associated minerals, characterized in that, Comprising the following steps: S1, according to the occurrence characteristics, distribution range of coal and associated minerals, associated minerals and the mining method used, two aspects of comprehensive analysis are obtained from the contradiction of coal and associated minerals mining; S2, for the contradiction of coal and associated minerals mining, with the design principles of space division, time sequence stagger, urgent need to go first, comprehensive utilization, reasonable avoidance, the coal and associated minerals mining area is reasonably divided, staggered mining, when the mineral resources are spatially divided, the layout, time sequence, scale and structure of resource exploitation should be considered as a whole; S3, based on the above analysis, the coal and associated mineral resources space is divided into three parts: superimposed area, protection area and normal mining area. In step S3, the superimposed area is the area where the coal seam and the associated minerals are spatially overlapped; the protection area is the area not planned for mining, which is used as a buffer zone between the superimposed area and the normal mining area, which can effectively reduce the influence of coal seam and associated minerals mining on each other; the normal mining area is the area outside the protection area, which can be normally mined because of the protection area as a buffer. The size of the protection area is determined according to the lateral boundary range of the water flowing fractured zone of the overburden strata of the mining face. The protection area is a buffer area between the superimposed area and the normal mining area, which is affected by the strata movement of the normal mining area on one side and the mining activity of the superimposed area on the other side. Therefore, the range of the protection area needs to be greater than the sum of the influence range of the normal mining area and the superimposed area to prevent the cracks of the two areas from penetrating each other, causing mine water disaster and toxic and harmful gas migration and diffusion. The strata movement angle of the normal mining area is δ, the distance between the coal seam and the upper associated mineral occurrence horizon is h, the influence range of the normal mining area is W 1, the safety coal pillar width is W 2, and the lateral development range of the water flowing fractured zone of the superimposed area is W 3. Then the range of the protection area W = W 1 + W 2 + W 3 = h / tanδ + W 2 + W 3. The safety coal pillar width W 2 is 5-10 times the coal seam mining height. A large number of field engineering practices show that the strata movement angle δ and the lateral development range of the water flowing fractured zone W 3 are affected by engineering geology, mining method and mining parameters, which need to be determined comprehensively according to the field engineering geology and mining conditions by using engineering analogy, field measurement and numerical analysis; S4, for the divided mineral resources, the mining time sequence of each division is determined according to the strategic demand attribute, occurrence characteristics, mining influence and economic value of mineral resources; S5, according to the reasonable division determined in step S3 and the mining time sequence of each division determined in step S4, the coal and associated minerals with superimposed distribution can be developed in an orderly manner.

2. The method according to claim 1, characterized in that, In step S1, the two aspects of comprehensive analysis are: (1) the size, occurrence horizon and relative spatial relationship of each associated mineral distribution area; (2) Clear the mining method used for coal seam mining and the mining method used for associated minerals, analyze which mining technical conditions are required for each of the two mining methods, and which adverse effects will be brought by each of the two mining methods. Further, according to the distribution area and relative spatial relationship of coal and associated minerals, analyze which area of minerals will be adversely affected after the mining of another kind of mineral, resulting in the destruction of the mining technical conditions of the minerals in this area and the inability to normally mine. Finally, the contradiction between coal and associated minerals mining is summarized.

3. The method according to claim 1, characterized in that, In the S2 step, when the minerals are spatially zoned, the resource mining layout, timing, scale and structure should be taken into account; when determining the resource mining timing of staggered mining, the strategic demand attributes, occurrence characteristics, mining influence and economic value of the resources should be considered comprehensively.

4. The method according to claim 1, characterized in that, In step S4, the consideration range of the value of mineral resources includes the strategic attributes, whether it is in urgent need, and economic value of mineral resources. Finally, it is determined whether to prioritize the upper or lower mineral.

5. The method according to claim 1, characterized in that, In step S4, the minerals in the protection zone are not mined because of the repeated mining disturbance of the two sides of the superimposed zone and the normal mining area for a long time. The minerals in the protection zone and their surrounding rock structures are relatively developed, the stability of the surrounding rock structure decreases, the original occurrence conditions change, and the mining difficulty is large. If the minerals in the protection zone are recovered, a comprehensive evaluation of safety, technology and economy is required before the recovery.

6. The method according to claim 1, characterized in that, In step S4, the mining timing of each zone is determined by the strategic demand attributes, occurrence characteristics, mining influence and economic value of mineral resources, which is replaced by the mining mode. When the mining mode is used to determine the mining timing of each zone, the mining area needs to be redefined.

7. The partitioned staggered coordinated mining method for coordinated, synergic and co-mining of coal and associated minerals according to claim 6, characterized in that, The mining mode includes coordinated mining mode, collaborative mining mode and co-mining mode.

8. The zoned staggered coordinated mining method for the coordinated, synergic and co-mining of coal and associated minerals according to claim 7, characterized in that, The coordinated mining mode is to divide the mineral occurrence area into coal mining area, associated minerals mining area and coordinated mining protection area according to the principle of spatial avoidance and mutual non-influence, and to take into account the resource mining layout, timing, scale and structure. In order to avoid the influence of mining activities on each other, the minerals in the coordinated mining protection area are not mined, and the coal mining area and the associated minerals mining area are mined in the direction away from each other with the coordinated mining protection area as the boundary.

9. The method according to claim 7, characterized in that, The collaborative mining mode divides the priority mining area and the lag mining area according to the principle of timing staggered and utilizing rock movement, and determines the reasonable mining method and mining layout for mining. By utilizing the rock movement caused by the mining of the minerals in the priority mining area, the mining of the minerals in the lag mining area is promoted, achieving the effect of collaborative mining of coal and associated minerals.

10. The method according to claim 7, characterized in that, The co-mining mode is used for homalide associated minerals. The coal and homalide associated minerals are mined together by using the coal production system.

11. The zoned staggered coordinated mining method for the coordinated, synergic and co-mining of coal and co-associated minerals according to claim 10, characterized in that, The co-mining mode is used for heteralide associated minerals. The two production systems of coal and heteralide associated minerals need to be connected by extending the development, and the minerals are mined by using the development well or transportation system.

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