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A flat-bottomed bottom structure for electric shovel mining When the extremely thin veins are mined, the sessile-free column structure of the electric shovel is used. The upper plate of the roadway along the vein will be widened, and then the side of the roadway along the roadway will be directly plucked upwards, and a fence will be set up along the side of the roadway to control the ore flow. An electric raft is installed in the roadway along the vein, and the ore that has been slid into the roadway is dumped into the transshipment patio (the next stage of the mining patio), and is slid to the next stage for loading and unloading. At this time, the bottom of the mine is used as a mine roadway along the pulse transport roadway, and the motor car is no longer used. Therefore, only the backward type mining can be adopted at the stage.
The position of the electric ramp is determined according to the thickness of the vein. It is usually cut along the contact belt of the upper disc. The cutting space is 2m high and the width is not less than 1.5~2m . Similar to the excavation into the lane, the loader can be used for loading, and the pillar or rock pillar with a width of 1~1.5m between the cutting space and the electric tunnel is opened, and a horizontal width of 1.8m and 2m wide is opened every 5m . Make the electric passage and the cutting space pass through. Therefore, when the thickness of the vein or ore body is less than 3m , the electric stern should be placed in the rock below the plate. When it is larger than 5m , it can be placed in the ore below the plate, and the 3~5m vein will be mined along the lower plate contact line. Part of the ore and part of the rock.
The elevation of the electric ramp and the cutting layer is consistent with the elevation of the transport lane. The mining mine is generally using the next stage of the mining patio, and the ore is loaded and transported in the lower transport lane.
Both ends of the electric ramp communicate with other lanes at the transport level to solve problems such as ventilation and pedestrians.
The advantages of this bottom structure are: ( 1 ) there is no small amount of bottom or bottom column; ( 2 ) the amount of mining and cutting is small, and it can be loaded by the loader during cutting, no need to manually transport ore, and the work efficiency is better. High; ( 3 ) no need to install a funnel . The pit wood consumption is small. Disadvantages are: ( 1 ) limited use, can only be used for the vein along the strike, and there is a lower patio in the lower part of the mining area or close to the lower part of the mining area; ( 2 ) a part of the ore remains after the ore deposit The floor of the mine can not be exhausted.
B loader loading flat bottom structure
The picture shows the flat bottom structure of the loader loading. The transportation roadway is arranged in the surrounding rock, 5~6m away from the ore body . The distance between the loading lanes is 5~7m .
The loading lane and the transport lane can be arranged at a right angle or at an obtuse angle. When using the previous arrangement, use the rotary disk to push the loader into the loader path. No corners and switches can be used.
The advantages of this bottom structure are: (1) there is no bottom column, the ore recovery rate is high, ( 2 ) there is no funnel opening, the pit wood consumption is relatively small, ( 3 ) the rake section is large, there is no funnel neck, ore It is not easy to block; ( 4 ) the bottom structure is especially simplified; ( 5 ) it is convenient to break the large block; ( 6 ) it has strong adaptability, and there is no strict requirement for the straight line of the contact line between the ore body and the surrounding rock. The disadvantages are: ( 1 ) loading is not as convenient as power consumption. On the one hand, loaders and mine cars are often restricted in short-distance lanes, and operation is not convenient. On the other hand, loading is often affected by shunting, and working hours are utilized. The rate is not high and the efficiency is low; ( 2 ) The broken large pieces are carried out at the transportation level, which is not conducive to ventilation and dust, and at the same time hinders transportation. ( 3 ) When the veins are dense, it is often difficult to arrange for extra-vehicle transportation. Lanes, alleys and tunnels are excavated in the rock, and there is no by-product ore. Therefore, it has not been promoted in vein deposits.
The position of the electric ramp is determined according to the thickness of the vein. It is usually cut along the contact belt of the upper disc. The cutting space is 2m high and the width is not less than 1.5~2m . Similar to the excavation into the lane, the loader can be used for loading, and the pillar or rock pillar with a width of 1~1.5m between the cutting space and the electric tunnel is opened, and a horizontal width of 1.8m and 2m wide is opened every 5m . Make the electric passage and the cutting space pass through. Therefore, when the thickness of the vein or ore body is less than 3m , the electric stern should be placed in the rock below the plate. When it is larger than 5m , it can be placed in the ore below the plate, and the 3~5m vein will be mined along the lower plate contact line. Part of the ore and part of the rock.
The elevation of the electric ramp and the cutting layer is consistent with the elevation of the transport lane. The mining mine is generally using the next stage of the mining patio, and the ore is loaded and transported in the lower transport lane.
Both ends of the electric ramp communicate with other lanes at the transport level to solve problems such as ventilation and pedestrians.
The advantages of this bottom structure are: ( 1 ) there is no small amount of bottom or bottom column; ( 2 ) the amount of mining and cutting is small, and it can be loaded by the loader during cutting, no need to manually transport ore, and the work efficiency is better. High; ( 3 ) no need to install a funnel . The pit wood consumption is small. Disadvantages are: ( 1 ) limited use, can only be used for the vein along the strike, and there is a lower patio in the lower part of the mining area or close to the lower part of the mining area; ( 2 ) a part of the ore remains after the ore deposit The floor of the mine can not be exhausted.
B loader loading flat bottom structure
The picture shows the flat bottom structure of the loader loading. The transportation roadway is arranged in the surrounding rock, 5~6m away from the ore body . The distance between the loading lanes is 5~7m .
The loading lane and the transport lane can be arranged at a right angle or at an obtuse angle. When using the previous arrangement, use the rotary disk to push the loader into the loader path. No corners and switches can be used.
The advantages of this bottom structure are: (1) there is no bottom column, the ore recovery rate is high, ( 2 ) there is no funnel opening, the pit wood consumption is relatively small, ( 3 ) the rake section is large, there is no funnel neck, ore It is not easy to block; ( 4 ) the bottom structure is especially simplified; ( 5 ) it is convenient to break the large block; ( 6 ) it has strong adaptability, and there is no strict requirement for the straight line of the contact line between the ore body and the surrounding rock. The disadvantages are: ( 1 ) loading is not as convenient as power consumption. On the one hand, loaders and mine cars are often restricted in short-distance lanes, and operation is not convenient. On the other hand, loading is often affected by shunting, and working hours are utilized. The rate is not high and the efficiency is low; ( 2 ) The broken large pieces are carried out at the transportation level, which is not conducive to ventilation and dust, and at the same time hinders transportation. ( 3 ) When the veins are dense, it is often difficult to arrange for extra-vehicle transportation. Lanes, alleys and tunnels are excavated in the rock, and there is no by-product ore. Therefore, it has not been promoted in vein deposits.
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