阅读说明：本技术 一种露天开采矿岩的运输系统及运输方法 (Transportation system and transportation method for open-pit mining ore rock ) 是由 郭其林 王飞飞 崔松军 马增 王冠 朱自强 宋华强 国仕磊 代俊成 周斌 王亮 于 2021-08-09 设计创作，主要内容包括：本发明提供一种露天开采矿岩的运输系统与方法,运输系统包括动力系统和轨道系统；轨道系统包括铺设于采场边坡不同台阶上可拼接轨道和放置于轨道上的运料车；动力系统包括电机房和设置于电机房内的电机驱动装置及连接电机驱动装置和运料车的牵引缆绳；运料车在电机驱动装置提供的动力下沿轨道运行将矿底的矿料运输到地表；各分段轨道通过铰接方式连接,可适应上下不同顷角的边坡,大大提高了运输系统的环境适应能力；采场的东南西北四个方位各安装一套运输系统,随着开采推进,可及时调整运输位置,加快开采进度。本发明以轨道运输系统代替传统公路汽车运输,大大减少开采时废石剥离量,降低开采成本,并实现自动化运输,提高了运输效率。(The invention provides a transportation system and a method for surface mining of mineral rocks, wherein the transportation system comprises a power system and a track system; the track system comprises splicing tracks laid on different steps of a stope slope and a material transporting vehicle placed on the tracks; the power system comprises a motor room, a motor driving device arranged in the motor room and a traction cable for connecting the motor driving device and the material transporting vehicle; the material transporting vehicle is driven by the motor driving device to move along the rail to transport the mineral aggregate at the bottom of the mine to the ground surface; the sectional tracks are connected in a hinged mode, so that the system can adapt to slopes with different upper and lower dip angles, and the environmental adaptability of the transportation system is greatly improved; a set of transportation system is respectively installed in four positions of the south, the east, the west and the north of the stope, and the transportation position can be adjusted in time along with the advancing of mining, so that the mining progress is accelerated. The track transportation system replaces the traditional road automobile transportation, so that the waste rock stripping amount during mining is greatly reduced, the mining cost is reduced, the automatic transportation is realized, and the transportation efficiency is improved.)

1. A transportation system for surface mining of mineral rocks, characterized in that: the transport system comprises a power system (20) and a track system (10); the track system (10) comprises tracks (11) laid on stope slopes and material transporting vehicles (12) matched with the tracks (11); the track (11) is of a sectional detachable structure, so that the track (11) is continuously extended along with the increase of the rubbing depth under a stope; the material conveying vehicle (12) is connected with the power system (20).

2. A conveyor system for surface mining mineral rocks according to claim 1, characterized in that: the track (11) comprises a transport track (111) and an unloading track (112); the transportation track (111) is laid in a stope, the unloading track (112) is laid on the ground surface and is connected with the transportation track (111) in an articulated manner; the transportation track (111) comprises an ore bottom transportation track (1111) and a slope transportation track (1112); the side slope transportation track (1112) is laid along steps of a stope side slope, the mine bottom transportation track (1111) is laid at the bottom of the stope, one end of the mine bottom transportation track is connected with the side slope transportation track (1112) in a hinged mode, and the other end of the mine bottom transportation track is fixed with the bottom of the stope; with the increase of the underground mining depth, the slope transportation track (1112) is extended obliquely downwards by additionally arranging track sections, and the mine bottom transportation track (1111) moves downwards horizontally.

3. A conveyor system for surface mining mineral rocks according to claim 2, characterized in that: an ore bottom storage bin (30) is arranged below the ore bottom conveying track (1111) and is used for storing mined ore materials; the depth of the ore bottom storage bin (30) is set to meet the connection between the two rail sections; be provided with anticollision area (301) on the cliff of ore deposit storage silo (30), prevent that dumper (12) and cliff direct impact from protecting dumper (12) and prevent its damage.

4. A conveyor system for surface mining mineral rocks according to claim 2, characterized in that: an anchoring system (50) is arranged between the side slope transportation track (1112) and the side slope and used for reinforcing the side slope transportation track (1112); the side slope is excavated into a step form, so that the whole side slope of the open stope is more stable and is not easy to collapse; the steps of the stope side slope are provided with safety platforms (60), and each 2-3 safety platforms are provided with a cleaning platform for intercepting and cleaning rocks falling off from the stope.

5. A conveyor system for surface mining mineral rocks according to claim 2, characterized in that: the unloading rail (112) is provided with a side turning device; a ground surface storage bin (40) is arranged below the unloading track (112); the side-turning device lifts one side of the unloading rail (112) so that the material conveying vehicle (12) automatically turns over due to the height difference of the two sides after reaching the unloading rail (112), and mineral materials in the material conveying vehicle (12) are automatically unloaded into the ground surface storage bin (40) to realize automatic unloading of the mineral materials.

6. A conveyor system for surface mining mineral rocks according to claim 5, characterized in that: a discharge hole (401) is formed in the bottom of the ground surface storage bin (40), mineral aggregate is leaked from the discharge hole (401) and is loaded into an ore truck, and the ore truck transports the mineral aggregate out of a stope; and a valve is arranged on the discharge port (401) to control the opening and closing of the discharge port (401).

7. A conveyor system for surface mining mineral rocks according to claim 5, characterized in that: the earth surface storage bin (40) is further provided with an earth surface storage bin supporting system (402) for maintaining the stability of the earth surface storage bin (40).

8. A conveyor system for surface mining mineral rocks according to claim 1, characterized in that: the power system (20) comprises a motor room (21) and a traction cable (22); a motor driving device is arranged in the motor room (21); the motor drive is connected to the trolley (12) via a traction cable (22).

9. A conveyor system for surface mining mineral rocks according to claim 1, characterized in that: and the four directions of the south, the east, the west and the north of the stope are respectively provided with one set of the transportation system.

10. A transportation method for open-pit mining ore rocks is characterized by comprising the following steps: using the transport system of any one of claims 1 to 9; the method comprises the following steps:

s1, firstly installing an unloading track (112) on the surface of a surface mine, and then excavating along a side slope of the surface mine in a step form; the steps are provided with safety platforms (60), and each 2-3 safety platforms are provided with a cleaning platform;

s2, installing a side slope transportation rail (1112) to the bottom of the stope from top to bottom along the side slope step dug in the step S1, and then installing a mine bottom transportation rail (1111);

s3, transporting the material transporting vehicle (12) to an ore bottom transporting track (1111), after the material transporting vehicle is filled with mineral materials, providing power by a motor driving device, and enabling a traction cable (22) to lift the material transporting vehicle (12) to an earth surface storage bin (40) along the ore bottom transporting track (1111) and a side slope transporting track (1112) to unload the materials;

and S4, after the material at the bottom of the mine is transported, continuously repeating the step S1 of excavating to the step S3 of transporting.

Technical Field

The invention relates to the technical field of ore rock transportation, in particular to a transportation system and a method for opencast mining of ore rocks.

Background

The process of surface mining generally comprises: the process comprises the steps of perforating, blasting, shovel loading, transporting and rock discharging, wherein all process links are mutually connected, mutually influenced and mutually restricted, and the most basic production cycle of open-pit mining is formed. Mining of ores in open-pit mines requires stripping of the gangue to mine the ore within boundary tastes. The ultimate goal of surface mining is to seek the maximum economic benefit under given engineering geology and mining conditions, and the restriction of economic benefit is reflected in the determination of reasonable slope angles. Numerous studies have shown that: if the final slope angle of the large surface mine side slope is improved by 1 degree, the rock stripping amount can be reduced by thousands of tons, a large amount of rock stripping cost is saved, and huge economic benefits are generated. Under specific rock conditions, the slope angle reaches the limit, and if the angle is increased, the slope is unstable, and collapse and landslide are easy to happen. At present, the designed open stope can design transportation roads in a pit, the designed roads can reduce the slope angle by 2-3 degrees, a lot of waste rocks are stripped, the investment cost is increased, the fuel consumption is large, the environment is polluted, the transportation distance is obviously increased along with the increase of the mining depth, the transportation capacity of a machine team is reduced, and the applicable economic mining depth is generally 200-300 m. Therefore, how to adopt an effective transportation method has important significance in improving the production efficiency, reducing the mining cost and creating economic benefits.

In view of the above, there is a need for a system and a method for transporting ore rocks with high automation degree, low transportation cost and strong environmental adaptability.

Disclosure of Invention

The invention aims to provide a transportation system and a transportation method suitable for mining the ore rocks in the surface mine, which can obviously improve the intelligent automatic control level of the transportation operation of the surface mine, reduce the transportation cost of the mining ore rocks in the surface mine, reduce the labor intensity of the production operation and improve the transportation efficiency of the mining ore rocks in the surface mine compared with the traditional transportation mode.

In order to achieve the above object, the present invention provides a transportation system for surface mining of mineral rocks, the transportation system comprising a power system and a rail system; the track system comprises tracks laid on stope slopes and material transporting vehicles matched with the tracks; the track is of a sectional detachable structure, so that the track is continuously extended along with the increase of the exploitation depth under a stope; the material transporting vehicle is connected with the power system.

As a further improvement of the invention, the track comprises a transport track and an unloading track; the transportation track is laid in the stope, and the unloading track is laid on the ground surface and is connected with the transportation track in a hinged mode; the transportation tracks comprise mine bottom transportation tracks and side slope transportation tracks; the side slope transportation track is laid along the stope side slope steps, the mine bottom transportation track is laid at the bottom of the stope, one end of the mine bottom transportation track is connected with the side slope transportation track in a hinged mode, and the other end of the mine bottom transportation track is fixed to the bottom of the stope; with the increase of the underground extension depth of the stope, the slope transportation track is extended obliquely downwards by additionally arranging track sections, and the mine bottom transportation track moves horizontally downwards.

As a further improvement of the invention, an ore bottom storage bin is arranged below the ore bottom transportation track and is used for storing mined ore materials; the depth of the ore bottom storage bin is set to meet the connection between the two rail sections; be provided with the anticollision area on the cliff of ore deposit storage silo, prevent that dumper and cliff direct collision from preventing its damage.

As a further improvement of the invention, an anchoring system is arranged between the side slope transportation track and the side slope and used for reinforcing the side slope transportation track; the side slope is excavated into a step form, so that the whole side slope of the open stope is more stable and is not easy to collapse; the stope side slope is provided with safety platforms, and each 2-3 safety platforms are provided with a cleaning platform for intercepting and cleaning the rock falling off from the stope.

As a further improvement of the invention, a side turning device is arranged on the unloading rail; a ground surface storage bin is arranged below the unloading track; the side-turning device lifts one side of the unloading rail, so that the material transporting vehicle automatically turns on side due to the height difference of the two sides after reaching the unloading rail, and mineral materials in the material transporting vehicle are automatically unloaded into the ground surface storage bin, and the mineral materials are automatically unloaded.

As a further improvement of the invention, the bottom of the surface storage bin is provided with a discharge port, mineral materials are leaked from the discharge port and loaded into a mining truck, and the mineral materials are transported out of a stope by the mining truck; and a valve is arranged on the discharge port to control the opening and closing of the discharge port.

As a further improvement of the present invention, the ground surface storage bin is further provided with a ground surface storage bin supporting system for maintaining the stability of the ground surface storage bin.

As a further improvement of the invention, the power system comprises a motor room and a traction cable; a motor driving device is arranged in the motor room; the motor driving device is connected with the material conveying vehicle through a traction cable.

As a further improvement of the invention, the transportation system and the power system are respectively arranged in four directions of the south, the east and the north of the stope.

A transportation method for open-pit mining ore rocks is characterized by comprising the following steps: using the transport system of any one of claims 1 to 9; the method comprises the following steps:

s1, firstly, installing an unloading track on the surface of an open-pit mine, and then excavating along a side slope of the open-pit mine in a step form; the steps are provided with safety platforms, and each 2-3 safety platforms are provided with a cleaning platform;

s2, installing a side slope transportation rail from top to bottom to the bottom of the stope along the side slope step dug in the step S1, and then installing a mine bottom transportation rail;

s3, transporting the material transporting vehicle to an ore bottom transporting track, after the material transporting vehicle is filled with mineral materials, providing power by a motor driving device, enabling a traction cable to lift the material transporting vehicle to an earth surface storage bin along the ore bottom transporting track and a side slope transporting track, and unloading the mineral materials;

and S4, after the ore material at the bottom of the mine is transported, continuously repeating the excavation in the step S1 to the transportation step in the step S3.

The invention has the beneficial effects that:

1. the invention provides a transport system and a method for open-pit mining of mineral rocks, wherein a material transporting vehicle is connected with a motor driving device in a motor room through a traction cable, the motor driving device provides power to pull the material transporting vehicle to move along a track, mineral materials are transported from a mine bottom storage bin to an earth surface storage bin, and then the mineral materials are leaked from the earth surface storage bin to a mine truck to be transported out of a stope, so that the automatic transport of the mineral materials is realized, the transport efficiency of the open-pit mining is greatly improved, the transport form of the existing open-pit mining is changed, and the problems of environmental pollution and high transport cost in the traditional automobile transport are effectively solved.

2. According to the transportation system and method for open-pit mining, the side turning device is arranged on the unloading rail, when the material transporting vehicle runs to the unloading rail, the side turning device is started to lift one side of the rail, the height difference of the rails on the two sides enables the material transporting vehicle to automatically turn on the side, and mineral materials are automatically unloaded into the earth surface storage bin, so that unloading automation is realized, manpower is greatly saved, transportation efficiency is improved, and labor intensity is reduced.

3. The invention provides a transportation system and a method for opencast mining of mineral rocks, and provides a novel method for coordinating transportation rail splicing and mining production scheduling, so that the problem that the laying of rails affects the mining progress can be avoided; the sectional type track form is designed, so that the transportation system can adapt to side slopes in different conditions, the environmental adaptability of the transportation system is improved, the transportation system and the existing road transportation system are mutually supplemented for use, and the condition that the mining transportation system is paralyzed after the side slopes of an open stope collapse to influence road transportation is avoided.

4. The invention provides a transportation system and a method for open-pit mining of ore rocks, which are characterized in that a set of transportation system and a set of power system are respectively installed in four directions of south, east, west and north of a stope, so that the transportation position can be adjusted in time along with the advancement of stope mining, the process of mine rock overturning at the bottom of a stope pit is reduced, and the mining progress is accelerated.

Drawings

FIG. 1 is a schematic illustration of a surface mining rock transport system provided by the present invention;

fig. 2 is a schematic view of another angle of the surface mining rock transport system provided by the present invention.

In the figure, 10-track system; 11-a track; 12-a material transporting vehicle; 20-a cable power system; 21-a motor room; 22-pulling the cable; 30-a mine bottom storage bin; 40-a ground surface storage bin; 50-an anchoring system; 60-a secure platform; 111-a transport track; 112-unloading the track; 301-collision avoidance belt; 401-a discharge hole; 402-surface storage silo support system; 1111-mine floor transportation track; 1112-slope transportation track.

Detailed Description

In order to make the objects, technical solutions and advantages of the present invention more apparent, the present invention will be described in detail with reference to the accompanying drawings and specific embodiments.

It should be noted that, in order to avoid obscuring the present invention with unnecessary details, only the structures and/or processing steps closely related to the aspects of the present invention are shown in the drawings, and other details not closely related to the present invention are omitted.

In addition, it is also to be noted that the terms "comprises," "comprising," or any other variation thereof, are intended to cover a non-exclusive inclusion, such that a process, method, article, or apparatus that comprises a list of elements does not include only those elements but may include other elements not expressly listed or inherent to such process, method, article, or apparatus.

As shown in fig. 1-2: a transportation system for surface mining of mineral rocks, comprising a power system 20 and a track system 10; the track system 10 comprises a track 11 laid in the stope and a material transporting vehicle 12 arranged on the track 11 and matched with the track; the track 11 is of a sectional detachable structure; with the increase of the exploitation depth under the stope, the extension track is continuously added; the material transporting vehicle 12 is connected with a power system 20, and the power system 20 provides power to enable the material transporting vehicle 12 to move along the track 11.

Specifically, the track 11 includes a transport track 111 and an unloading track 112; the transport track 111 is laid in the yard and the discharge track 112 is laid on the ground and is connected to the transport track 111 in an articulated manner. The transportation track 111 comprises a mine bottom transportation track 1111 and a slope transportation track 1112; the mine bottom transportation track 1111 is laid at the bottom of the stope, the side slope transportation track 1112 is laid along the step of the side slope of the stope, one end of the mine bottom transportation track 1111 is connected with the side slope transportation track 1112 in a hinged mode, one end of the mine bottom transportation track 1111 is fixed with the mine bottom, along with the increase of the expansion depth under the stope, the side slope transportation track 1112 is segmented by additionally arranging the track, the mine bottom transportation track 1111 horizontally moves downwards in an inclined and downward extension mode. In order to stabilize the stope side slope, the side slope is excavated into a step form during open-pit mining, and the step form ensures that the side slope is not easy to collapse. The side slope is provided with a safety platform 60, and every 2-3 safety platforms are provided with a cleaning platform for intercepting and cleaning rocks falling off from the stope. Typically, the height of each step is 10-12 m. Arranging a subsection at the height of the two step slopes, laying a section of track, and connecting the subsection tracks in a hinged mode; the sectional track can adapt to the side slope with inconsistent upper and lower angles, and is convenient to adapt to different depths of an open stope by increasing one section of track along with the deepening of the stope.

The bottom storage bin 30 is designed below the bottom transportation track 1111 and used for placing the mineral aggregate mined by blasting. The mine floor transportation rail 111 is connected with the slope transportation rail 1112 at one end in a hinged manner, and the other end is fixed on the rock wall above the mine floor storage bin 30. The depth of the ore bottom storage bin 30 is set to meet the connection between two rail sections; the excavation depth of the ore bottom storage bin can be firstly put into the track subsection, the depth of the ore bottom storage bin becomes shallow along with the deepening of the mining field, and the ore bottom storage bin is further deepened before the next track subsection is installed, and the process is circulated repeatedly until the next track subsection reaches the boundary of the bottom of the mining field. The inner wall of the ore bottom storage bin 30 is also provided with an anti-collision belt 301, so that the material transporting vehicle 12 is prevented from being in direct contact collision with the inner wall of the ore bottom storage bin 30, and the material transporting vehicle 12 is prevented from being damaged.

Preferably, the mine bottom storage bin 30 may be rectangular shaped with a length of 4-6m and a width of 2-3 m. The ore material in the ore bottom storage bin 30 is loaded into the material transporting vehicle 12 by a forklift, and then the material transporting vehicle 12 transports the ore material to the ground along the rail 11. Preferably, the cross section of the material transporting vehicle 12 is rectangular, the length is 3-4m, the width is 2-3m, the material transporting vehicle 12 corresponds to the size of the track 11, at least one material transporting vehicle is placed on the track 11, and the material transporting vehicle 12 transports the ore material at the bottom of the mine to the ground along the slope transporting track 1112. The number of trucks 12 may be increased when increased transport capacity is desired.

Below the side slope transportation section track 1112 there is provided an anchoring system 50, the anchoring system 50 comprising anchor rods and anchor lines. Preferably, the anchor cable is 15-20m in length, the anchor rod is 5-10m in length, one end of the anchor rod is inserted into the stope slope, the other end of the anchor rod is connected with the slope transportation track 1112, and the anchor cable fixes the slope transportation track 1112 and the anchor rod between the anchor rod and the slope transportation track 1112. The anchoring system 50 can both reinforce the stope side slope and maintain the stability of the side slope transportation rails 1112, ensuring that the material transporting vehicle 12 is stably transported on the side slope transportation rails 1112. In the stripping process of the open stope, the slope transportation rail 1112 and the slope rock mass anchoring system 50 can be prepared and implemented, when the slope transportation rail 1112 can be installed, a segmented rail is installed in a centralized manner, and after the installation is finished, the ore rocks in the stope can be transported quickly. The novel method for coordinating the track splicing and the scheduling can avoid the problem of track laying from influencing the mining progress, and greatly improves the transportation efficiency.

The unloading rail 112 is arranged above the ground surface, the unloading rail 112 is provided with a side-turning device, when the material transporting vehicle 12 transports the mineral materials in the mine bottom storage bin 30 to the upper part of the unloading rail 112, the side-turning device is started to enable one side of the unloading rail 112 to be lifted and the other side to be tiled, and the material transporting vehicle 12 automatically turns over to discharge the mineral materials due to the height difference of the two ends. The unloading rail 112 realizes automatic unloading through the side turning device, and labor force is greatly saved.

The ground storage bin 40 is arranged below the unloading rail 112, and the material transporting vehicle 12 directly pours the mineral aggregate into the ground storage bin 40 after automatically turning over on the unloading rail 112.

Preferably, the feed inlet of the surface storage bin 40 is set to be rectangular with the length of 6-8m and the width of 5-6m, the discharge outlet 401 is arranged at the lower part of the surface storage bin 40, and the interior of the surface storage bin 40 is set to be trapezoidal with a large upper opening and a small lower opening. The large upper opening enables mineral aggregates to enter the surface storage bin 40 more easily when the material transporting vehicle 12 automatically turns on its side, the small lower opening (the discharge opening 401) enables the mineral aggregates in the surface storage bin 40 to be more easily leaked and loaded into a mining truck, and then the mining truck transports the mineral aggregates in the surface storage bin 40 out of a stope. The transportation mode is mutually supplemented and practical with a modern road transportation system, and the breakdown of the mining transportation system after the road transportation is influenced by the collapse of the side slope of the open stope is avoided.

In particular, a valve is arranged on the discharge port 401, when the ore truck arrives below the discharge port 401, the valve is opened to enable the ore material to leak into the ore truck, and the ore truck carries away the rock material; when the mine truck is full, the valve is closed, so that the mineral aggregate does not leak out.

To make the surface storage silo 40 more stable, a surface storage silo support system is provided on the surface storage silo 40 for stabilizing the surface storage silo 40.

The power system 20 comprises a motor room 21, a motor driving device arranged in the motor room and a traction cable 22; one end of the traction cable 22 is connected with the material transporting vehicle 12 placed on the track 11, and the other end is connected with the motor driving device in the motor room 21, and after the motor driving device in the motor room 21 is started, power is provided to enable the traction cable 22 to lift the material transporting vehicle 12 to move along the track 11, so that the mineral materials in the mine bottom storage bin 30 are continuously transported into the ground surface storage bin 40.

The transportation system is respectively arranged in four directions of the south, the east, the west and the north of the stope, the transportation position can be adjusted in time along with the advance of stope mining, the process that the stope pit bottom overturns the ore rock is reduced, and the mining progress is accelerated.

A method of transporting surface mined ore rock comprising the steps of:

s1, firstly installing an unloading track 112 on the surface of a surface mine, and then excavating along a side slope of the surface mine in a step form; the steps are provided with safety platforms 60, and each 2-3 safety platforms 60 are provided with a cleaning platform for intercepting and cleaning rocks falling off from a stope, so that the mining safety is guaranteed.

S2, installing a side slope transportation rail 1112 to the bottom of the stope from top to bottom along the side slope step dug in the step S1, and then installing a mine bottom transportation rail 1111;

s3, transporting the material transporting vehicle 12 to an ore bottom transporting track 1111, after the material transporting vehicle is filled with mineral materials, providing power by a motor driving device, enabling a traction cable 22 to lift the material transporting vehicle 12 to an earth surface storage bin 40 along the ore bottom transporting track 1111 and a side slope transporting track 1112, and unloading the mineral materials;

and S4, after the ore material at the bottom of the mine is transported, continuously repeating the step of excavating from the step S1 to the step S3 of transporting until the boundary of the bottom of the stope is reached finally.

In summary, the transportation system and method for strip mining of mineral rocks provided by the present invention connect the material transporting vehicle 12 with the motor driving device in the power system 20 through the traction cable 22, the motor driving device provides power to make the material transporting vehicle 12 move along the track 11 under the traction of the traction cable 22 to transport mineral materials from the ore bottom storage bin 30 to the surface storage bin 40, then the mineral materials are loaded into the ore truck through the discharge port 401 of the surface storage bin 40, and finally the mineral materials are transported out of the mining yard by the ore truck. The transportation mode of traction force provided by the power system 20 realizes automation of transportation of open-pit mining ore rocks, greatly improves the transportation efficiency, reduces the labor intensity and effectively solves the problem of environmental pollution caused by traditional automobile transportation; the unloading rail 112 is provided with a side-turning device, when the material transporting vehicle 12 runs to the upper part of the ground surface storage bin 40, the side-turning device is started, so that the material transporting vehicle 12 automatically turns to the side to automatically unload the mineral materials into the ground surface storage bin below, the unloading automation is realized, the labor is saved, and the transportation efficiency is improved; the transportation rail 111 is of a detachable splicing structure, so that the transportation rail 111 can adapt to slopes with different inclination angles, the environmental adaptability of a transportation system is greatly improved, the transportation rail splicing and mining production scheduling are combined, and the condition that the mining progress is influenced by the rail laying problem can be avoided; one set of transportation system is all installed in four position of stope east-west south-north, and along with the promotion of stope exploitation, the transportation position can be adjusted in time, reduces the process that the pit bottom turns over the rock for the exploitation progress.

Although the present invention has been described in detail with reference to the preferred embodiments, it will be understood by those skilled in the art that various changes may be made and equivalents may be substituted for elements thereof without departing from the spirit and scope of the present invention.