Rail stope preparation arrangement method for room-and-pillar method stope

Abstract

The invention provides a room-and-pillar method stope tracked accurate mining arrangement method, and belongs to the field of underground mine stoping, and the room-and-pillar method stope tracked accurate mining arrangement method comprises the following steps: dividing an ore body into middle sections along the vertical height, dividing the middle sections into panels along the ore body trend, dividing the panels into segments along the vertical height, and setting the inclined length of the segmented ore body according to the inclination angle of the ore body; a main transportation roadway of the middle section is constructed at the bottom of the middle section to be communicated with all panels of the middle section, a panel uphill and an air return uphill are constructed in studs at the two ends of the panels respectively, an uphill track is laid in the panel uphill to be communicated with a main transportation track in the main transportation roadway of the middle section, and a lifting winch is arranged above the uphill track; taking the subsection as a stope, dividing chambers and pillars along the trend of the ore body, stoping all the chambers, reserving point pillars when stoping the pillars, and laying empty vehicle tracks and heavy vehicle tracks between the point pillars while stoping until the subsection is stoped. By combining winch rail lifting transportation and carry-scraper carrying ore removal, efficient and safe ore removal is achieved.

Description

Technical Field

[0001] The invention relates to the technical field of underground mine recovery, and in particular to a room-and-pillar stope tracked mining arrangement method. Background Art

[0002] At present, the room-and-pillar method is mostly used for mining of thin ore bodies with stable and gently inclined rocks. However, due to factors such as ore handling equipment, the bottom structure of the mine, and the short-term rapid advancement of the working face, trackless mining and layout methods are mostly used. When mining, electric rakes or shovel loaders are mainly used to transport the collapsed ore to the mine chute of the mine and release it through the chute to the mine car in the middle transport lane, or the shovel loaders are used to directly load the collapsed ore into the mine car in the middle transport lane. When the "electric rake mechanical transportation + funnel bottom structure" is used for mining, although the equipment maintenance is simple and the adaptability is good, there are disadvantages such as low mining efficiency, high labor intensity, and short electric rake transportation distance; when the "shovel loaders transportation + flat bottom structure" is used for mining, although the shift efficiency is high and the labor intensity is low, there are disadvantages such as poor adaptability of the ore body and high cost of long-distance transportation. Especially when the slope of the mine floor fluctuates greatly, the equipment walking ability and shift efficiency are greatly reduced. In addition, affected by the optimal transportation distance of the transportation equipment, the geometric parameters of the mining area are relatively small during trackless mining layout (the middle section height is generally 15~20m, and the oblique length of the middle section ore body is 50~60m). This leads to problems such as a large number of middle section layouts of mines, a large amount of development and mining engineering, high ore transportation costs, and a large mining ratio. Summary of the invention

[0003] In view of the technical problems existing in the background technology, the present application provides a room-and-pillar mining area tracked mining arrangement method, aiming to solve the technical problems of low mining efficiency of trackless mining and a large number of middle-section main transport tunnels that need to be developed.

[0004] The present application provides a room-and-pillar stope tracked mining arrangement method, comprising the following steps: S1. Divide the ore body into middle sections along the vertical height, divide the middle section into panels along the ore body strike, and divide the panels into sections along the vertical height; the height of the middle section is 40~50m; reserve pillars between panels; when the ore body inclination is less than 12°, the oblique length of the segmented ore body is 70~80m; when the ore body inclination is ≥12°, the oblique length of the segmented ore body is 40~50m; S2. Construct the main transport lane of the middle section at the bottom of the middle section to connect all the panels in the middle section, construct the panel uphill and return air uphill in the columns at both ends of the panel to connect to the main transport lane of the upper middle section, lay the uphill track in the panel uphill to connect to the main transport track in the main transport lane of the middle section, and set a lifting winch above the uphill track; S3. Take the sections as the mining area, divide the mine rooms and pillars along the direction of the ore body, and mine all the mine rooms. When mining the pillars, reserve point pillars, and lay empty vehicle tracks and heavy vehicle tracks between the point pillars while mining until the mining of this section is completed; the empty vehicle tracks are inclined downward along the forward direction of the empty vehicle, and the heavy vehicle tracks are inclined downward along the forward direction of the heavy vehicle.

[0005] In the technical solution of the embodiment of the present application, the middle section is divided along the vertical height, the middle section is divided into the pan area along the direction of the ore body, and the pan area is divided into segments along the vertical height. In the segmentation process, the oblique length of the segmented ore body is controlled within different ranges according to the different inclination angles of different positions of the ore body, thereby providing favorable conditions for rail transportation; the pan area uphill and return air uphill are constructed separately in the pan area columns, and the uphill track is laid in the pan area uphill; at the same time, empty vehicle tracks and heavy vehicle tracks are laid between the segmented columns to smoothly realize rail mining.

[0006] In some embodiments, the slopes of the empty vehicle track and the loaded vehicle track are both 7-10‰; the slope of the uphill track is the same as the slope of the uphill bottom plate of the pan area.

[0007] In this embodiment, by reasonably setting the slopes of the empty vehicle track and the loaded vehicle track, power is provided for the smooth advancement of the empty mine car and the fully loaded mine car in the segment.

[0008] In some embodiments, an empty vehicle track switch with a curvature radius of 11 to 13 m is provided at the connection between the empty vehicle track and the uphill track; a heavy vehicle track switch with a curvature radius of 5 to 7 m is provided at the connection between the heavy vehicle track and the uphill track; and a mine exit switch is provided at the connection between the empty vehicle track and the heavy vehicle track.

[0009] In this embodiment, by setting up an empty track switch, it is convenient for an empty mine car to smoothly enter the empty track from the uphill track, and then enter the goaf to load ore; by setting up a heavy track switch, it is convenient for a fully loaded mine car to smoothly enter the uphill track from the heavy track switch, and then enter the transportation track in the main transportation lane in this middle section; by setting up a mine exit switch, it is convenient for an empty mine car to smoothly enter the heavy track from the empty track.

[0010] In some embodiments, a dispatching winch is arranged above the mine turnout and above the heavy vehicle track; the motor power of the dispatching winch is 20~30kW, and the maximum static tension of the wire rope connected above the dispatching winch is 15~18kN; the motor power of the lifting winch is 40~50kW, the maximum lifting speed is 1.5~1.6m / s, and the maximum static tension of the wire rope connected above the lifting winch is 18~22kN.

[0011] In this embodiment, by setting up a dispatching winch, when the empty mine car reaches the end of the empty car track, the dispatching winch can perform transition traction and deceleration on the empty mine car, so that the empty mine car can safely reach the loading point.

[0012] In some embodiments, the mine exit route is as follows: an empty mine car enters the uphill track through the middle section main transport tunnel, enters the empty track switch from the uphill track under the traction of the lifting winch, and then reaches the end of the empty track by gravity, and reaches the loading point of the heavy vehicle track through the mine exit switch through the dispatching winch. The shovel loader transfers the collapsed ore from the mining face to the empty mine car, and the fully loaded mine car runs from the heavy vehicle track to the heavy vehicle switch under the auxiliary traction of the dispatching winch, and then returns to the middle section main transport tunnel through the uphill track under the traction of the lifting winch.

[0013] In this embodiment, by rationally arranging the lines and scientifically designing the tracks, the mine car can be unpoweredly transported out of the mine, effectively saving the power consumption of mining out of the mine, and perfectly realizing the seamless connection between mining out of the mine and hoisting up the mountain.

[0014] In some embodiments, the uphill track is a 22kg / m steel rail with a track gauge of 600mm; the empty vehicle track and the heavy vehicle track are 15kg / m steel rails with a track gauge of 600mm.

[0015] In this embodiment, the types of rails are reasonably set according to the different uses of the uphill track, the empty vehicle track and the loaded vehicle track to improve safety.

[0016] In some embodiments, the width of the mine room is 11-13 m; the size of the point column is (4.0-4.5) m×(4.0-4.5) m, and the spacing between adjacent point columns reserved in the mine pillar is 4.0-10.0 m.

[0017] In this embodiment, by reasonably setting the width of the mine room and the pillars, efficient segmented mining is achieved; by reasonably setting the size and spacing of the point pillars, as much ore as possible is recovered while supporting the goaf and maintaining the stability of the surrounding rock.

[0018] In some embodiments, a top column is reserved above the middle section, and a bottom column is reserved below the middle section, and the width of the top column and the bottom column are both 5.0~7.0m.

[0019] In this embodiment, by reserving a top column above the middle section and a bottom column below the middle section, the adjacent middle sections are separated to prevent the collapse of the goaf of the upper and lower middle sections from causing adverse effects on the main transport tunnel of the middle section.

[0020] In some embodiments, the width of the intermediate pillars is 13-14 m, the width of the upper hill of the panel area is 3-4 m, and the heights of the intermediate pillars and the upper hill of the panel area are both the thickness of the ore body.

[0021] In this embodiment, by reasonably setting the width of the intermediate pillars, different panel areas are separated and the stability of the surrounding rock is maintained; by reasonably setting the width of the panel area going uphill, conditions are provided for laying the uphill track and the movement of the mine car.

[0022] In some embodiments, the scraper is an electric scraper with a bucket capacity of 0.8-1.2 m 3 The mine car is a side-dumping mine car with a bucket capacity of 1.0~1.3m 3 .

[0023] The above description is only an overview of the technical solution of the present application. In order to more clearly understand the technical means of the present application, it can be implemented in accordance with the contents of the specification. In order to make the above and other purposes, features and advantages of the present application more obvious and easy to understand, the specific implementation methods of the present application are listed below. BRIEF DESCRIPTION OF THE DRAWINGS

[0024] In order to more clearly illustrate the technical solution of the present application, the following is a brief introduction to the drawings used in the present application. Obviously, the drawings described below are only some embodiments of the present application, and for ordinary technicians in this field, other drawings can be obtained based on these drawings without creative work.

[0025] Figure 1 It is a horizontal projection diagram of the stope of the room-and-pillar stope tracked mining arrangement method in the embodiment of the present application; Figure 2 This is a cross-sectional view of the mine site of the room-and-pillar mine site tracked mining arrangement method in the embodiment of the present application; Figure 3 for Figure 1 A magnified view of middle; Explanation of the reference numerals: 1-intermediate pillar; 2-main transport tunnel in the middle section; 3-uphill in the pan area; 4-return air uphill; 5-uphill track; 6-point pillar; 7-empty vehicle track; 8-loaded vehicle track; 9-empty vehicle track switch; 10-loaded vehicle track switch; 11-dispatching winch; 12-lifting winch; 13-mine exit switch; 14-main transport tunnel in the upper middle section; 15-collapsed ore; 16-segmented transport tunnel. DETAILED DESCRIPTION

[0026] The following embodiments of the technical solution of the present application are described in detail in conjunction with the accompanying drawings. The following embodiments are only used to more clearly illustrate the technical solution of the present application, and are therefore only used as examples, and cannot be used to limit the scope of protection of the present application.

[0027] Unless otherwise defined, all technical and scientific terms used herein have the same meaning as commonly understood by technicians in the technical field to which this application belongs; the terms used herein are only for the purpose of describing specific embodiments and are not intended to limit this application; the terms "including" and "having" in the specification and claims of this application and the above-mentioned figure descriptions and any variations thereof are intended to cover non-exclusive inclusions.

[0028] Reference to "embodiments" herein means that a particular feature, structure, or characteristic described in conjunction with the embodiments may be included in at least one embodiment of the present application. The appearance of the phrase in various locations in the specification does not necessarily refer to the same embodiment, nor is it an independent or alternative embodiment that is mutually exclusive with other embodiments. It is explicitly and implicitly understood by those skilled in the art that the embodiments described herein may be combined with other embodiments.

[0029] In the description of the embodiments of the present application, the orientation or positional relationship indicated by technical terms such as "length", "width", "thickness", "top" and "bottom" are based on the orientation or positional relationship shown in the accompanying drawings. They are only for the convenience of describing the embodiments of the present application and simplifying the description, and do not indicate or imply that the referred device or element must have a specific orientation, be constructed and operated in a specific orientation. Therefore, it should not be understood as a limitation on the embodiments of the present application.

[0030] In the description of the embodiments of the present application, unless otherwise clearly specified and limited, technical terms such as "installed", "connected", "connected", "fixed" and the like should be understood in a broad sense. For example, it can be a fixed connection, a detachable connection, or an integral connection; it can be a mechanical connection or an electrical connection; it can be a direct connection or an indirect connection through an intermediate medium, and it can be the internal connection of two elements or the interaction relationship between two elements. For those of ordinary skill in the art, the specific meanings of the above terms in the embodiments of the present application can be understood according to the specific circumstances.

[0031] At present, when the room-and-pillar method is used to recover thin ore bodies with stable, gently inclined ore bodies, trackless mining methods such as electric rakes or shovel loaders are mostly used inside the middle section of the mining area, and the mining efficiency is relatively low. At the same time, in order to adapt to trackless mining, the height of the middle section is relatively small when the ore body is divided, resulting in a large number of middle section arrangements and a large number of middle section main transportation tunnels that need to be developed.

[0032] In order to solve the technical problems of low mining efficiency and a large number of middle main transport tunnels that need to be developed in the trackless mining method, the present application provides a room-and-pillar method mining field rail mining layout method, wherein the middle section is divided along the vertical height, the middle section is divided into plate areas along the direction of the ore body, and the plate areas are divided into sections along the vertical height. In the process of segmentation, the oblique length of the segmented ore body is controlled within different ranges according to the different inclination angles of different positions of the ore body, providing favorable conditions for rail transportation; the plate area uphill and return air uphill are constructed separately in the plate area columns, and the uphill track is laid in the plate area uphill; at the same time, empty vehicle tracks and heavy vehicle tracks are laid between the segmented columns. By combining the winch rail lifting transportation with the shovel loader to move out of the mine, a safe, reliable and economical room-and-pillar method mining field layout method is formed, which can not only save the mining engineering volume and shorten the middle section preparation time, but also give full play to the technical advantages of rail equipment.

[0033] Please refer to Figure 1-Figure 3 The present application provides a room-and-pillar method for tracked mining and arrangement, comprising the following steps: S1. The ore body is divided into the middle section along the vertical height direction, the middle section is divided into the plate area along the ore body strike, and the plate area is divided into the subsection along the vertical height direction; the middle section height is 40~50m, and the oblique length of the middle section ore body exceeds 200m; a column 1 is reserved between adjacent plates; when the ore body inclination is less than 12°, the oblique length of the subsection ore body is 70~80m, and when the ore body inclination is ≥12°, the oblique length of the subsection ore body is 40~50m. Column 1 is a continuous ore column.

[0034] In this step, the gently inclined thin ore body is divided into a middle section with a height of 40 to 50m along the vertical height direction. Compared with the conventional middle section with a height of 15 to 20m, this application reduces the division of the middle section, thereby reducing the number of main transport lanes in the middle section and reducing the amount of mining engineering. Then the middle section with a long oblique length is divided into different disk areas along the direction of the ore body, and the segments are divided in the vertical height direction in the disk area. In the segmentation process, the oblique length of the segmented ore body is controlled within different ranges according to the different inclination angles of different positions of the ore body (when the inclination angle of the ore body is small, the oblique length of the segmented ore body is relatively long; when the inclination angle of the ore body is large, the oblique length of the segmented ore body is relatively short), so as to reasonably control the maximum step distance of the subsequent empty car track 7 and the heavy car track 8, so as to avoid affecting the equipment performance and mining efficiency due to the large step distance of the empty car track 7 and the heavy car track 8 when the inclination angle of the ore body is large, and at the same time avoid the problem of low mining efficiency caused by frequent laying and recovery of the track due to the short step distance of the empty car track 7 and the heavy car track 8 when the inclination angle of the ore body is small.

[0035] S2. The main transport tunnel 2 of the middle section is constructed at the bottom of the middle section to connect all the panels of the middle section. The panel uphill 3 and the return air uphill 4 are constructed in the intermediate columns 1 at both ends of the panel, so that the panel uphill 3 and the return air uphill 4 are connected with the main transport tunnel 14 of the upper middle section. The uphill track 5 is laid in the panel uphill 3, so that the uphill track 5 is connected with the transport track set in the main transport tunnel 2 of the middle section and the transport track set in the main transport tunnel 14 of the upper middle section (the provision of the transport track in the main transport tunnel of the middle section is a conventional setting of the mining project in this field, which will not be repeated here), and the corresponding hoisting winch 12 is provided above the uphill track 5. Specifically, the main transport tunnel 2 of the middle section and the main transport tunnel 14 of the upper middle section are provided along the strike of the ore body, and the panel uphill 3 and the return air uphill 4 are provided along the inclination direction of the ore body. When mining the ore body, the upper middle section is mined first and then the current middle section. When mining each middle section, it is mined in different panels along the direction of the ore body. Therefore, when mining the current middle section, the main transport tunnel 14 of the upper middle section has been excavated. When mining the first panel in the middle section, it is necessary to construct the panel uphill 3 and the return air uphill 4 respectively. When mining subsequent panels, it is only necessary to construct the panel uphill 3. At this time, the panel uphill 3 of the adjacent panel is used as the return air uphill 4 of this panel.

[0036] In this step, the main transport tunnel 2 of the middle section is constructed at the bottom of the panel area, and the panel area uphill 3 and the return air uphill 4 are constructed in the intermediate columns 1 at both ends of the panel area to form a ventilation circuit. Specifically, the fresh air flows from the panel area uphill 3 through the goaf to the mining face of the mining site. After flushing the working face, the polluted air enters the return air uphill 4 from the mining face through the goaf, and finally merges into the main return air shaft and is discharged to the surface. The uphill track 5 is laid in the panel area uphill 3, and the hoisting winch 12 is arranged above the uphill track 5. Through the coordinated cooperation of the uphill track 5 and the hoisting winch 12, the mine car can smoothly enter and exit the panel area uphill 3, providing the necessary conditions for track mining.

[0037] S3, with the segment as the mining site, the mine room and the pillar are divided along the direction of the ore body, and all the mine rooms are mined. When mining the pillars, point pillars 6 are reserved, and empty car tracks 7 and heavy car tracks 8 are laid between the point pillars 6 while mining, until the current segment is mined; the empty car track 7 is inclined downward along the direction of the empty car, and the heavy car track 8 is inclined downward along the direction of the heavy car. Specifically, the upper segment is mined first, and then the current segment is mined; when mining the segment, as the segment mining site is continuously mined, the length of the empty car track 7 and the heavy car track 8 gradually increases, until when the mining reaches the end of the current segment, the length of the empty car track 7 and the heavy car track 8 is the length of the segment mining site. The empty mine car arrives at the loading site along the empty car track 7, and the shovel loader loads the collapsed ore 15 into the empty mine car, and the fully loaded mine car transports the collapsed ore 15 out along the heavy car track 8. The forward directions of the empty mine car and the fully loaded mine car are opposite, that is, the inclination directions of the empty car track 7 and the heavy car track 8 are opposite.

[0038] In this step, mining is carried out in sections, and the section mining is carried out using the room-and-pillar method, and point pillars 6 are reserved. The existence of the point pillars 6 can support the goaf and ensure the stability of the surrounding rock. As mining continues, empty vehicle tracks 7 and heavy vehicle tracks 8 are laid between the point pillars 6 to form a segmented transport lane 16, that is, the segmented transport lane 16 is gradually formed during the mining process. It can be understood that when mining is carried out in the top segment of each middle section, it is necessary to construct a mining field cutting lane in advance, which also serves as the segmented transport lane 16 of the disk area to form a return air system. At this time, empty vehicle tracks 7 and heavy vehicle tracks 8 are laid in the segmented transport lane 16 while mining, and the mine room and mine pillars are mined at the same time or the mine room is mined first and then the mine pillars; there is no need to construct additional segmented transport lanes 16 in advance for the remaining segments. When mining the remaining segments, the empty vehicle tracks 7 and heavy vehicle tracks 8 in the upper segment can be used first. When mining the part far away from the upper segment, empty vehicle tracks 7 and heavy vehicle tracks 8 can be set up between the point pillars 6 of this segment to facilitate transportation. The empty car track 7 and the loaded car track 8 provide favorable conditions for the empty mine car and the fully loaded mine car to enter the segment smoothly, respectively, to ensure the smooth operation of the tracked ore discharge inside the segment, thereby improving the ore discharge efficiency. In addition, the travel routes of the empty mine car and the fully loaded mine car are separated, that is, the empty car track 7 and the loaded car track 8 are respectively set, so that the transportation process of the empty mine car and the fully loaded mine car is not interfered, and the inclination direction of the empty car track 7 and the loaded car track 8 is set to be opposite, so that the empty mine car and the fully loaded mine car are both downhill during the forward process, further improving the ore discharge efficiency.

[0039] In the technical solution of the embodiment of the present application, by combining winch rail lifting and transportation with scraper hauling out of the mine, a safe, reliable and economical room-and-pillar method for mining and layout is formed, which can not only save mining engineering and shorten the mid-stage preparation time, but also give full play to the technical advantages of rail equipment, effectively alleviate the shortcomings of scraper ore body adaptability, improve mining efficiency, and realize the combined integrated innovation of mining equipment in ore body mining. The equipment used in this method is conventional mining equipment, with simple process, low cost and broad application prospects, providing a guiding basis for mine production adjustment and operation management.

[0040] Further, in some embodiments, the slopes of the empty vehicle track 7 and the loaded vehicle track 8 are both 7-10‰; the slope of the uphill track 5 is the same as the slope of the bottom plate of the uphill 3 of the disk area. Specifically, during the laying process of the empty vehicle track 7 and the loaded vehicle track 8, the slope is controlled by laying a crushed stone cushion layer on the bottom plate of the goaf. The slope of the empty vehicle track 7 is recorded as a positive slope, i.e., +(7-10)‰; the slope of the loaded vehicle track 8 is recorded as a negative slope, i.e., -(7-10)‰.

[0041] In the technical solution of the embodiment of the present application, by controlling the slope of the empty vehicle track 7 and the loaded vehicle track 8 within a reasonable range, it is possible to provide power for the smooth advancement of empty mine cars and fully loaded mine cars in the sections; at the same time, it can also avoid the risk of overturning of empty mine cars and fully loaded mine cars due to excessive forward speed when the slope is too high.

[0042] Furthermore, in some embodiments, Figure 3 As shown, an empty track switch 9 with a curvature radius of 11-13m is provided at the connection between the empty track 7 and the uphill track 5; a heavy track switch 10 with a curvature radius of 5-7m is provided at the connection between the heavy track 8 and the uphill track 5; and a mine-exit switch 13 is provided at the connection between the empty track 7 and the heavy track 8. Specifically, the curved concave surfaces of the empty track switch 9 and the heavy track switch 10 are arranged toward the upper middle section main transport lane 14.

[0043] In the technical scheme of the embodiment of the present application, by setting an empty track switch 9 at the connection between the empty track 7 and the uphill track 5, it is convenient for the empty mine car to smoothly enter the empty track 7 from the uphill track 5, so as to enter the goaf to load ore. By setting a heavy track switch 10 at the connection between the heavy track 8 and the uphill track 5, it is convenient for the fully loaded mine car to smoothly enter the uphill track 5 from the heavy track switch 10, and then enter the transportation track in the main transportation lane 2 of the middle section, and then smoothly transport the ore to the surface through the main transportation system. By setting a mine-out switch 13, it is convenient for the empty mine car to smoothly enter the heavy track 8 from the empty track 7. The curved concave surfaces of the empty track switch 9 and the heavy track switch 10 are set toward the upper middle section main transportation lane 14, so that the empty mine car has a certain initial speed when entering the empty track 7, so that it can slide to the end of the empty track 7 by inertia, and the fully loaded mine car has a certain uphill tendency when leaving the heavy track 8, slowing down the forward speed of the fully loaded mine car and preventing overturning.

[0044] Furthermore, in some embodiments, Figure 3 As shown, a dispatching winch 11 is arranged above the mine turnout 13 and above the heavy vehicle track 8; the motor power of the dispatching winch 11 is 20~30kW, and the maximum static tension of the steel wire rope connected above the dispatching winch 11 is 15~18kN; the motor power of the lifting winch 12 is 40~50kW, the maximum lifting speed is 1.5~1.6m / s, and the maximum static tension of the steel wire rope connected above the lifting winch 12 is 18~22kN.

[0045] In the technical solution of the embodiment of the present application, by arranging the dispatching winch 11 above the mine turnout 13 and above the heavy vehicle track 8, when the empty mine car reaches the end of the empty vehicle track 7, the dispatching winch 11 can perform transition traction and deceleration on the empty mine car, so that the empty mine car can safely reach the loading point. According to the different uses of the dispatching winch 11 and the lifting winch 12, the motor power and the maximum static tension of the wire rope are reasonably set, so that the dispatching winch 11 and the lifting winch 12 can play a better role.

[0046] Furthermore, in some embodiments, Figure 3 As shown, the mining route is: the empty mine car enters the uphill track 5 through the main transport tunnel 2 of the middle section, enters the empty car track switch 9 from the uphill track 5 under the traction of the lifting winch 12, and then reaches the end of the empty car track 7 through its own gravity, and is pulled by the dispatching winch 11 to reach the loading point of the heavy car track 8 through the mine discharge switch 13 to transfer the collapsed ore 15 from the mining face to the empty mine car, and then the fully loaded mine car slowly runs from the heavy car track 8 to the heavy car track switch 10 under the auxiliary traction of the dispatching winch 11 and the mutual coordination of the fully loaded mine car's own weight, and then returns to the main transport tunnel 2 of the middle section through the uphill track 5 under the traction of the lifting winch 12, and uses the transport track in the main transport tunnel 2 of the middle section to transport the ore to the surface through the main hoisting system. Specifically, the travel route of the scraper is: the scraper transports the caved ore 15 from the caved ore pile to the loading point of the empty mine car, and then returns to the caved ore pile by the original route after loading. In the actual production process, the loading point of the empty mine car is set nearby according to the location of the caved ore pile to reduce the travel route of the scraper.

[0047] In the technical solution of the embodiment of the present application, by rationally arranging the lines and scientifically designing the tracks, the track 5, the empty track 9, the empty track 7, the mine turnout 13, the heavy track 8, the heavy track turnout 10, the hoisting winch 12 and the dispatching winch 11 are coordinated to realize the rapid mine exit by rail. At the same time, the mine car is transported out of the mine without power, which effectively saves the power consumption of the mine exit, and perfectly realizes the seamless connection between the mine exit and the mountain hoisting.

[0048] Furthermore, in some embodiments, the uphill track 5 is a 22kg / m steel rail with a track gauge of 600mm; the empty vehicle track 7 and the loaded vehicle track 8 are 15kg / m steel rails with a track gauge of 600mm.

[0049] In the technical solution of the embodiment of the present application, the types of rails are reasonably set according to the different uses of the uphill track 5, the empty vehicle track 7 and the heavy vehicle track 8 to improve safety.

[0050] Furthermore, in some embodiments, the width of the mine room is 11-13 m; the size of the point column 6 is (4.0-4.5) m×(4.0-4.5) m, and the spacing between adjacent point columns 6 reserved in the mine column is 4.0-10.0 m.

[0051] In the technical solution of the embodiment of the present application, by reasonably setting the width of the mine room and the ore pillars, efficient segmented mining is achieved; by reasonably setting the size and spacing of the point pillars 6, as much ore as possible can be recovered while supporting the goaf and maintaining the stability of the surrounding rock; by reasonably setting the width of the mine room, the size and spacing of the point pillars 6, favorable conditions are provided for the laying of the empty vehicle track 7 and the heavy vehicle track 8.

[0052] Further, in some embodiments, a top pillar is reserved above the middle section, and a bottom pillar is reserved below the middle section, and the width of the top pillar and the bottom pillar are both 5.0-7.0 m. Specifically, the top pillar and the bottom pillar are continuous pillars.

[0053] In the technical solution of the embodiment of the present application, the adjacent middle sections are separated by reserving a top column above the middle section and a bottom column below the middle section to prevent the collapse of the upper and lower middle section goafs from causing adverse effects on the main transport tunnel 2 of the middle section.

[0054] Further, in some embodiments, the width of the intermediate pillar 1 is 13-14 m, the width of the upper plate 3 is 3-4 m, and the heights of the intermediate pillar 1 and the upper plate 3 are both the thickness of the ore body. Specifically, the width of the upper plate 3 is greater than the maximum width of the mine car.

[0055] In the technical solution of the embodiment of the present application, different panel areas are separated and the stability of the surrounding rock is maintained by reasonably setting the width of the intermediate pillars 1. By reasonably setting the width of the panel area uphill 3, conditions are provided for laying the uphill track 5 and the travel of the mine car.

[0056] Furthermore, in some embodiments, the scraper is an electric scraper with a bucket capacity of 0.8 to 1.2 m 3 The mine car is a side-dumping mine car with a bucket capacity of 1.0~1.3m 3 .

[0057] Some specific embodiments are listed below. It should be noted that the embodiments described below are exemplary and are only used to explain the present application, and cannot be understood as limiting the present application. If no specific technology or conditions are specified in the embodiments, the technology or conditions described in the literature in the field or the product instructions shall be followed.

[0058] Example 1 Take a phosphate mine in Sichuan, my country as an example. The specific situation of the mine is: the ore layer is a single-layer structure, which is located in light gray, gray and dark gray dolomite. The ore rock is stable, the average thickness of the ore body is 2.5m, the average inclination is 10°, the local fluctuation is large, and the maximum inclination is 17°. The mine design adopts room-and-pillar mining, and the ore is unloaded by a scraper + mine car.

[0059] The room-and-pillar method stope track mining layout method comprises the following steps: S1. The ore body is divided into 6 middle sections along the vertical height direction, namely 2780m, 2740m, 2700m, 2650m, 2600m and 2550m. The middle section height is 40~50m and the oblique length of the middle section ore body is 200~300m. Top pillars and bottom pillars are reserved between adjacent middle sections. The top pillars and bottom pillars are continuous ore pillars with a width of 5.0~7.0m.

[0060] The middle section is divided into 10 panels along the ore body strike, with pillar 1 reserved between adjacent panels. Pillar 1 is a continuous ore pillar with a width of 13.6m and a height equal to the thickness of the ore body.

[0061] The panel area is divided into 3 to 5 sections along the vertical direction. The number and spacing of sections vary according to the inclination of the mining section: when the inclination of the ore body is less than 12°, the oblique length of the segmented ore body is controlled at 70 to 80m; when the inclination is ≥12°, the oblique length is controlled at 40 to 50m.

[0062] S2. Construct the main transport lane 2 of this middle section at the bottom of this middle section to connect all the panel areas of this middle section, construct the panel uphill 3 and the return air uphill 4 in the intermediate columns 1 at both ends of the panel area respectively, so that the panel uphill 3 and the return air uphill 4 are connected with the main transport lane 14 of the upper middle section, lay the uphill track 5 in the panel uphill 3, so that the uphill track 5 is connected with the transport track set in the main transport lane 2 of this middle section and the transport track set in the main transport lane 14 of the upper middle section, and set the corresponding lifting winch 12 above the uphill track 5.

[0063] The width of the upper hill 3 in the pan area is 3.6m and the height is the thickness of the ore body.

[0064] The uphill track 5 is a 22kg / m steel rail with a track gauge of 600mm.

[0065] The model of the hoisting winch 12 is JTP-1.0×1.0P, the motor power is 45kW, the maximum hoisting speed is 1.59m / s, and the maximum static tension of the wire rope connected above the hoisting winch 12 is 20kN. The hoisting of the plate area uphill adopts a series of cars, and the number of mine cars hoisted at a time is 2.

[0066] S3. Take the sections as the mining area, divide the mine rooms and pillars along the direction of the ore body, and mine all the mine rooms. When mining the pillars, reserve point pillars 6, and lay empty vehicle tracks 7 and heavy vehicle tracks 8 between the point pillars 6 while mining until the mining of this section is completed; the empty vehicle track 7 is inclined downward along the forward direction of the empty vehicle, and the heavy vehicle track 8 is inclined downward along the forward direction of the heavy vehicle.

[0067] The width of the mine room is 12m; the size of the point column 6 is 4.5m×4.5m, and the spacing between adjacent point columns 6 reserved in the mine column is 8m.

[0068] The slope of the empty track 7 is +8‰, and the slope of the heavy track 8 is -8‰. Both the empty track 7 and the heavy track 8 are 15kg / m rails with a gauge of 600mm. An empty track switch 9 with a curvature radius of 12m is provided at the connection between the empty track 7 and the uphill track 5. The empty track switch 9 is a ZDK615\4\12 switch; a heavy track switch 10 with a curvature radius of 6m is provided at the connection between the heavy track 8 and the uphill track 5. The heavy track switch 10 is a ZDK615\3\6 switch; a mine exit switch 13 is provided at the connection between the empty track 7 and the heavy track 8.

[0069] A dispatching winch 11 is arranged above the mine turnout 13 and the heavy vehicle track 8; the dispatching winch 11 is of JD-1.6 model, the motor power is 25kW, and the maximum static tension of the wire rope connected above the dispatching winch 11 is 16kN. The scraper is an electric scraper with a bucket capacity of 1.0m 3 The mine car is a side-dumping mine car with a bucket capacity of 1.2m 3 .

[0070] It should be noted that the present application is not limited to the above-mentioned embodiments. The above-mentioned embodiments are only examples, and the embodiments having the same structure as the technical idea and exerting the same effect within the scope of the technical solution of the present application are all included in the technical scope of the present application. In addition, without departing from the scope of the main purpose of the present application, various modifications that can be thought of by those skilled in the art to the embodiments and other methods of combining some of the constituent elements in the embodiments are also included in the scope of the present application.

Claims

1. A room-and-pillar stope tracked mining arrangement method, characterized in that: The steps include: S1. Divide the ore body into middle sections along the vertical height, divide the middle section into panels along the ore body strike, and divide the panels into sections along the vertical height; the height of the middle section is 40~50m; reserve pillars between panels; when the ore body inclination is less than 12°, the oblique length of the segmented ore body is 70~80m; when the ore body inclination is ≥12°, the oblique length of the segmented ore body is 40~50m; S2. Construct the main transport lane of the middle section at the bottom of the middle section to connect all the panels in the middle section, construct the panel uphill and return air uphill in the columns at both ends of the panel to connect to the main transport lane of the upper middle section, lay the uphill track in the panel uphill to connect to the main transport track in the main transport lane of the middle section, and set a lifting winch above the uphill track; S3. Take the sections as the mining area, divide the mine rooms and pillars along the direction of the ore body, and mine all the mine rooms. When mining the pillars, reserve point pillars, and lay empty vehicle tracks and heavy vehicle tracks between the point pillars while mining until the mining of this section is completed; the empty vehicle tracks are inclined downward along the forward direction of the empty vehicle, and the heavy vehicle tracks are inclined downward along the forward direction of the heavy vehicle.

2. The room-and-pillar stope tracked mining arrangement method according to claim 1, characterized in that: The slopes of the empty vehicle track and the loaded vehicle track are both 7-10‰; the slope of the uphill track is the same as the slope of the uphill bottom plate of the pan area.

3. The room-and-pillar stope tracked mining arrangement method according to claim 2, characterized in that: An empty vehicle track switch with a curvature radius of 11 to 13 m is provided at the connection between the empty vehicle track and the uphill track; a heavy vehicle track switch with a curvature radius of 5 to 7 m is provided at the connection between the heavy vehicle track and the uphill track; and a mine exit switch is provided at the connection between the empty vehicle track and the heavy vehicle track.

4. The room-and-pillar stope tracked mining arrangement method according to claim 3, characterized in that: A dispatching winch is arranged above the mine turnout and above the heavy vehicle track; the motor power of the dispatching winch is 20~30kW, and the maximum static tension of the wire rope connected above the dispatching winch is 15~18kN; the motor power of the hoisting winch is 40~50 kW, the maximum hoisting speed is 1.5~1.6m / s, and the maximum static tension of the wire rope connected above the hoisting winch is 18~22kN.

5. The room-and-pillar stope tracked mining arrangement method according to claim 4, characterized in that: The mine exit route is as follows: the empty mine car enters the uphill track through the main transport tunnel of the middle section, enters the empty track switch from the uphill track under the traction of the lifting winch, and then reaches the end of the empty track by gravity, and reaches the loading point of the heavy track from the mine exit switch through the traction of the dispatching winch. The scraper transfers the collapsed ore from the mining face to the empty mine car, and the fully loaded mine car runs from the heavy track to the heavy track switch under the auxiliary traction of the dispatching winch, and then returns to the main transport tunnel of the middle section via the uphill track under the traction of the lifting winch.

6. The room-and-pillar stope tracked mining arrangement method according to claim 5, characterized in that: The uphill track is a 22kg / m steel rail with a track gauge of 600mm; the empty vehicle track and the heavy vehicle track are 15kg / m steel rails with a track gauge of 600mm.

7. The room-and-pillar stope tracked mining arrangement method according to claim 1, characterized in that: The width of the mine room is 11-13 m; the size of the point column is (4.0-4.5) m×(4.0-4.5) m, and the spacing between adjacent point columns reserved in the mine pillar is 4.0-10.0 m.

8. The room-and-pillar stope tracked mining arrangement method according to claim 1, characterized in that: A top column is reserved above the middle section, and a bottom column is reserved below the middle section, and the widths of the top column and the bottom column are both 5.0~7.0m.

9. The room-and-pillar stope tracked mining arrangement method according to claim 1, characterized in that: The width of the intermediate pillars is 13-14 m, the width of the upper hill of the panel area is 3-4 m, and the heights of the intermediate pillars and the upper hill of the panel area are both the thickness of the ore body.

10. The room-and-pillar stope tracked mining arrangement method according to claim 1, characterized in that: The scraper is an electric scraper with a bucket capacity of 0.8~1.2m 3 The mine car is a side-dumping mine car with a bucket capacity of 1.0~1.3m 3 .

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