CN109025996B - Underground mine layer-by-layer extrusion and smooth blasting mining method - Google Patents
Underground mine layer-by-layer extrusion and smooth blasting mining method Download PDFInfo
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- CN109025996B CN109025996B CN201810817503.6A CN201810817503A CN109025996B CN 109025996 B CN109025996 B CN 109025996B CN 201810817503 A CN201810817503 A CN 201810817503A CN 109025996 B CN109025996 B CN 109025996B
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- E—FIXED CONSTRUCTIONS
- E21—EARTH OR ROCK DRILLING; MINING
- E21C—MINING OR QUARRYING
- E21C41/00—Methods of underground or surface mining; Layouts therefor
- E21C41/16—Methods of underground mining; Layouts therefor
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- E—FIXED CONSTRUCTIONS
- E21—EARTH OR ROCK DRILLING; MINING
- E21F—SAFETY DEVICES, TRANSPORT, FILLING-UP, RESCUE, VENTILATION, OR DRAINING IN OR OF MINES OR TUNNELS
- E21F13/00—Transport specially adapted to underground conditions
- E21F13/04—Transport of mined material in gravity inclines; in staple or inclined shafts
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- E—FIXED CONSTRUCTIONS
- E21—EARTH OR ROCK DRILLING; MINING
- E21F—SAFETY DEVICES, TRANSPORT, FILLING-UP, RESCUE, VENTILATION, OR DRAINING IN OR OF MINES OR TUNNELS
- E21F15/00—Methods or devices for placing filling-up materials in underground workings
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F42—AMMUNITION; BLASTING
- F42D—BLASTING
- F42D3/00—Particular applications of blasting techniques
- F42D3/04—Particular applications of blasting techniques for rock blasting
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Abstract
the invention discloses a layer-by-layer extrusion and smooth blasting mining method for an underground mine, which comprises the following steps: an upper plate air return roadway and a lower plate vein-following transportation roadway are arranged along the trend of the ore body; the lower-tray vein-following transportation lane is parallel to the trend of the ore body, and an ore pass is arranged on the other side of the lower-tray vein-following transportation lane; the two ends of the ore block are provided with thoroughfare perpendicular to the direction of the ore body; the length of the stope is 40-100 m, the width is 5-20 m of the thickness of the ore body, and the height is 40-60 m; and the stope mining adopts a mode of extruding smooth blasting layer by layer from bottom to top. The extrusion smooth blasting technology is adopted, the extrusion blasting is firstly carried out, then the stope roof smooth blasting is carried out, the rate of large ore blocks extruded layer by layer is low, and the blasting cost is low; smooth blasting layer by layer is adopted, disturbance to surrounding rocks is reduced, the surrounding rocks are kept stable, a stope roof is smooth, and construction of operators in the stope is safe; the full tailings are filled layer by layer upwards, and the filling cost is low.
Description
The technical field is as follows:
The invention relates to the technical field of underground mine mining, and mainly relates to a layer-by-layer extrusion and smooth blasting mining method for an underground mine, which is mainly suitable for thick and irregular ore bodies and medium and stable ore rocks.
Background art:
in mining, the upward layered filling mining method is widely applied, and has the characteristics of simple structure, convenience in operation, and low dilution and loss rate. The traditional every shift of operation personnel of the upward layered filling mining method enters a stope for rock drilling and ore breaking, the local stability of a stope roof is difficult to guarantee, the large block rate is high, secondary crushing is required, the safety risk of the operation personnel is high, the work efficiency is low, and the construction cost is high.
the invention content is as follows:
The invention aims to make up the defects of the prior art, and provides a mining method for underground mine by layer extrusion and smooth blasting, wherein a layer-by-layer extrusion smooth blasting technology is adopted, extrusion blasting is firstly carried out, then smooth blasting is carried out on a stope roof, and the large block rate of the ore is extruded layer by layer, so that the blasting cost is low; smooth blasting layer by layer is adopted, disturbance to surrounding rocks is reduced, the surrounding rocks are kept stable, a stope roof is smooth, and construction of operators in the stope is safe; the method is mainly suitable for an upward layered filling mining method and also suitable for a shallow hole shrinkage method.
The invention is realized by the following technical scheme:
The underground mine layer-by-layer extrusion and smooth blasting mining method is characterized by comprising the following steps: the method comprises the following steps:
1) An upper plate air return roadway and a lower plate vein-following transportation roadway are arranged along the trend of the ore body, the lower plate vein-following transportation roadway is parallel to the trend of the ore body, an ore pass shaft is arranged on the other side of the lower plate vein-following transportation roadway, and veins vertical to the trend of the ore body are arranged at two ends of the ore body; the length of the stope is 40-100 m, the width is 5-20 m of the thickness of the ore body, and the height is 40-60 m; the stope mining adopts a mode of extruding smooth blasting layer by layer from bottom to top, and the mining height of each layer is 3-8 m;
2) Pedestrian patios are respectively arranged at two ends of the stope, and pedestrian communication channels which correspond to the stope positions on each layer one by one are arranged on the pedestrian patios; a filling well is arranged in the middle of the stope;
3) Carrying out extrusion smooth blasting on the first layer at the bottom of the stope: dividing a first layer at the bottom of a stope into two parts, performing extrusion blasting on one part, performing smooth blasting on a top plate of the part, performing ore removal on the part by using a scraper after blasting, performing extrusion blasting on the other part when the ore removal of the part is finished, performing smooth blasting on the top plate of the part, and performing ore removal on the part by using the scraper after blasting;
4) after the first layer of ore is removed from the bottom of the stope, constructing stope drop shafts of reinforced concrete at the positions, corresponding to the trisection of the length of the footwall stope, of the ore removal positions respectively, constructing reinforced concrete retaining walls at two ends of a cutting roadway, and arranging filter pipes in the reinforced concrete retaining walls; the bottom of the stope drop shaft is provided with a vibration ore drawing machine, and an ore conveying roadway is constructed at the position, close to the stope drop shaft, of the stope bottom; after the concrete meets the strength requirement, erecting a filling pipe in a filling well, filling the first layer at the bottom of the stope, and stopping filling when the filling reaches a position 1.8m away from the top plate of the first layer at the bottom of the stope;
5) after the water filled in the first layer at the bottom is seeped out, mining stopes layer by layer in a sequence from bottom to top, wherein the mining steps of each stope are as follows: the stope is divided into two parts for mining successively, one part is subjected to extrusion blasting, then the top plate of the part is subjected to smooth blasting, and a scraper is adopted for ore removal after blasting; when the ore removal of the part is finished, performing extrusion blasting on the other part, performing smooth blasting on the top plate of the part, and digging the ore of the stope to a stope drop shaft by using a rake after blasting; after ore removal of the stope of the layer in the step, constructing a reinforced concrete chute to extend to the position height 1.8m away from the top plate of the layer, constructing a reinforced concrete retaining wall on pedestrian communication roads at two ends of the stope, erecting a water filtering pipe in the retaining wall, filling when the concrete meets the design strength requirement, and stopping filling until the height of the position 1.8m away from the top plate of the layer is reached; and (4) after the filling water of the stope seeps out, repeating the steps to mine the ore of the previous layer, and thus mining layer by layer until the whole stope finishes mining.
Step 5, blasting ore falling by using a filling well as a free surface and a stope bottom space as a supplement space in the extrusion blasting, filling the chute with ore before ore falling each time, and covering the opening of the chute with the ore; when ore is removed, the scraper winch with the scraper bucket is adopted to scrape the ore which is collapsed after each layer of extrusion blasting to the stope drop shaft, the vibration ore drawing machine is adopted to put the ore in the stope drop shaft to the transport vehicle, the ore is conveyed to the ore drop shaft, and the ore is lifted to the ground surface after being crushed.
The underground mine layer-by-layer extrusion and smooth blasting mining method is characterized by comprising the following steps: the cutting lane is a one-third three-center arch, and the section specification is as follows: 3.0m × 2.5m (width × height); constructing a pedestrian communication channel every 6m in the pedestrian sky well, wherein the section specification of each layer of pedestrian communication channel is as follows: 1.8m × 1.8m (width × height); the ore conveying roadway is a one-third three-center arch, and the section specification is as follows: 4.0m × 3.5m (width × height); a filling well, the section specification of which is as follows: 1.8m × 1.8 m; the inner diameter of the stope drop shaft is 2.5m, and the concrete thickness of the stope drop shaft is 0.5 m; the concrete thickness of reinforced concrete barricade is 800mm, and the reinforcing bar welding is on the ore rock stock.
the underground mine layer-by-layer extrusion and smooth blasting mining method is characterized by comprising the following steps: when each layer of explosive is subjected to extrusion blasting, a YSP-45 rock drill is adopted to construct a vertical blast hole, the depth is 4m, the charging length is 3.2m, the hole plugging length is 0.8m, every 6 rows of same-section blasting are carried out, a plurality of rows of sectional micro-differential extrusion blasting are carried out, and the unit consumption of each ton of explosive is 0.36 kg; and when the top plate of each layer is subjected to smooth blasting, 4m long drill rods are adopted to perform smooth blasting row by row, the eye distance is 0.6m, the thickness is 0.5m, the smooth blasting is performed row by row until the boundary of a stope, and when the top plate is partially crushed, an anchor rod or an anchor net is supported.
The underground mine layer-by-layer extrusion and smooth blasting mining method is characterized by comprising the following steps: stope ventilation is required after each extrusion blasting and smooth blasting: fresh air flow enters the working face of the stope from the vein-following transportation lane and the through vein through the pedestrian raise, and dirty air enters the upper middle section return airway through the stope filling well and the pedestrian raise and is discharged out of the ground surface through the return airway.
the method is characterized in that ore blasted from the first layer at the bottom of a stope is removed by a 2m JCCY scraper and conveyed to an ore chute, ore is removed from the rest layers by a 2 DPJ-30 KW electric rake winch with a 0.5m 3 rake bucket, the ore is scraped from the layers by an electric rake, the ore from the chute is scraped to the chute, the ore from the chute is put to a transport vehicle by a vibration ore drawing machine and conveyed to an intermediate ore chute, the ore is slid to a lower-stage transport roadway, and the mine vehicle is pulled by an electric locomotive and conveyed to a slipping system to be lifted to the ground surface.
The underground mine layer-by-layer extrusion and smooth blasting mining method is characterized by comprising the following steps: after the first layer of ore removal at the bottom of the stope is finished, a reinforced concrete retaining wall and a stope chute are built, the concrete strength is C20, deformed steel bars with the diameter of 18mm are adopted, the mesh degree is 300mm multiplied by 300mm, the thickness of the stope chute is 500mm, the thickness of the retaining wall is 800mm, and filter pipes are arranged in the retaining wall; when the concrete reaches the strength, filling the concrete by arranging a filling pipe from a filling derrick, controlling the concentration of filling slurry to be 68-75%, filling the concrete by adopting full tailings until the concrete is 1.8m away from a first layer of top plate at the bottom of a stope, and stopping filling; and after the filling water of the stope seeps out, carrying out second layered stoping, and after ore removal, carrying out filling again, so that layered circulating filling is carried out until the stope finishes filling.
and constructing a cutting roadway at the bottom of the stope, brushing and expanding the cutting roadway to the boundary of the stope, arranging two ends of the stope by using pedestrian patios, and communicating the pedestrian communication roadway with the stope. Vertical upward shallow hole rock drilling and multiple rows of same-section differential extrusion blasting are adopted. And (4) constructing horizontal drilling holes on the ore pile, and performing smooth blasting on a stope roof. According to the size of the inclination angle of the ore body, a vertical stope drop shaft can be adopted, and an inclined stope drop shaft can also be adopted. And a vibration ore drawing machine is arranged at the bottom of the stope drop shaft for drawing ore. Ore removal of the stope adopts a scraper to scrape ores, and the ores in the stope climb into the chute.
the invention has the following positive effects by the technical scheme:
1) the ore mining recovery rate of the stope is high, and the operation safety of stope operators is high under the stope roof with smooth blasting;
2) The mining is carried out by adopting layer-by-layer extrusion blasting, the unit consumption of explosive is low, the ore block size is small, and the ore removal efficiency is improved;
3) The scraper is adopted for raking ores per layer, so that the operation is convenient, tailing raking is less in entering a drop shaft, and the dilution rate is reduced;
4) The vibrating ore drawing machine is installed at the bottom of the stope drop shaft, so that automobile ore conveying is carried out, and the ore conveying efficiency is improved.
5) the invention adopts full tailings filling, and the filling cost is low.
Description of the drawings:
fig. 1 is a plan view of the structure of a field in the method of the invention.
fig. 2 is a cross-sectional view of a stope in the method of the invention.
Figure 3 is a longitudinal section of a stope in the method of the invention.
The specific implementation mode is as follows:
see the drawings.
The mining method adopts the step-by-step extrusion blasting and smooth blasting. The specific implementation steps are as follows:
stope arrangement
The ore block is divided into an ore room and an ore pillar along the trend direction of the ore body, a middle-section chute 7 is arranged on the other side of a footwall vein 1, the vein is parallel to the ore body, veins 2 are arranged at two ends of a stope, the veins are arranged in the ore pillar, a pedestrian patio 3 is respectively arranged at two ends of the stope, a stope chute 5 is arranged by the footwall of the ore body, a vibration ore drawing machine 11 is arranged at the bottom of the chute, and an ore conveying roadway 4 is constructed close to the stope chute. And a filling well 9 is arranged in the middle of the stope. The length of a stope is 66m, the width of the stope is 16.5m of the thickness of an ore body, the height of the stope is 60m, a cutting roadway is arranged in the middle of the bottom of the stope, the cutting roadway is used as a free surface to be brushed and expanded to the boundary of the stope, the stope is divided into two parts to be subjected to extrusion and smooth blasting mining, the part which is mined firstly is subjected to ore removal, the other part is subjected to rock drilling and ore dropping, when half of ores of the stope are nearly removed, one part of the other stope is subjected to extrusion ore dropping, and then the top plate of the stope is. And (4) after each layer of mine in the stope is taken out, constructing a stope chute and a pedestrian communication road retaining wall, filling until the distance between the stope chute and the pedestrian communication road retaining wall is 1.8m, stopping filling, and performing layered mining after filling water in the stope seeps out, so that the process of circulating layer by layer is carried out until the whole stope is completely mined.
Mining accurate cutting
A cutting roadway 11 is constructed in the middle of the bottom of the chamber, and is a one-third three-heart arch, and the section specification is as follows: 3.0m is multiplied by 2.5m (width is multiplied by height), a pedestrian raise is respectively arranged in the ore pillars at two ends of the stope, and the section specification is as follows: 2.0m is multiplied by 2.0m, a layer of pedestrian communication channel 8 is constructed every 6m in the pedestrian sky well, and the section specification is as follows: 1.8m × 1.8m (width × height). Stope drop shafts with the inner diameter of 2.5m are respectively arranged at trisection positions of the length of the stope close to the ore body footwall, the thickness of concrete is 0.5m, a vibration ore drawing machine is arranged at the bottom of each drop shaft, an ore conveying roadway is constructed close to the stope drop shafts, the ore conveying roadway is a one-third three-centered arch, and the section specification is as follows: 4.0m 3.5m (width x height). Constructing a filling well in the middle of a stope, wherein the specification is as follows: 1.8 m.times.1.8 m.
Working in stoping
1. Blasting in rock drilling
and (3) performing brushing expansion on a drift and a stope and rock drilling on a horizontal hole of a top plate by adopting an YT-28 rock drill, and constructing a vertical blast hole by adopting YSP-45 rock drilling, wherein the depth is 4m, the diameter of the blast hole is 40mm, the row spacing is 0.8m, and the hole spacing is 1.0 m. The method comprises the steps of manually charging the No. 2 rock explosive, carrying out sectional differential extrusion blasting, and detonating by using a non-electric detonating tube. Each layer is divided into extrusion blasting ore falling and smooth blasting ore falling, and the height is controlled to be 4.2-4.4 m. And constructing a cutting roadway in the middle of the bottom of the chamber, brushing and expanding until the height reaches 2.5m, and then removing the ore. The filling well is used as a free surface, the space after ore removal is used as a supplement space, the stope is divided into two parts for sequential extrusion and smooth blasting mining, the part which is firstly mined is subjected to ore removal, and the other part is subjected to rock drilling and ore breaking. And (3) filling the ore pass with ores before other ore passes in the first layer, and covering the opening of the ore pass with the ores to prevent the ore passes from being damaged by ore passes. Constructing vertical blast holes on each layer by adopting a YSP-45 rock drill, wherein the depth is 4m, the charging length is 3.2m, the hole plugging length is 0.8m, blasting in the same section in every 6 rows, and performing sectional differential extrusion blasting, wherein the unit consumption of each ton of explosive is 0.36 kg; and the top plate adopts 4m long drill rods, smooth blasting is carried out row by row, the eye distance is 0.6m, the thickness is 0.5m, and the smooth blasting is carried out row by row until the boundary of a stope. The scraper mine-raking operator always operates under the smooth blasting stope roof, the stope roof is good in stability, and the operator is safe. And (4) carrying out anchor rod or anchor net support under the condition that the top plate is locally broken. And after the first layer is mined, constructing reinforced concrete retaining walls at two ends of a stope opening, wherein the thickness of the reinforced concrete retaining walls is 800mm, constructing stope chutes with the inner diameter of 2.5m at the trisection positions of the stope length of the ore body footwall, installing a vibration ore drawing machine, and filling until the concrete reaches the strength requirement, wherein the concrete is filled to the position 1.8m away from the stope top plate. And carrying out layered circulating mining and filling operation until the stope finishes mining and filling.
2. Stope ventilation
Fresh air flow enters the working face of the stope from the vein-following transportation lane and the through vein through the pedestrian raise, dirty air enters the upper middle section return airway 2 through the stope filling well and the pedestrian raise, and is discharged out of the ground surface through the return airway.
3. Ore removal and transportation:
And (3) blasting ore from the first layer at the bottom, ore removal by using a 2m JCCY scraper and ore delivery to an ore chute, ore removal from the rest layers by using a 2 DPJ-30 KW electric rake winch and a 0.5m 3 rake bucket, raking the layer-caving ore to the chute by using an electric rake, placing the ore from the chute of the stope to a transport vehicle by using a vibration ore drawing machine, delivering the ore to the ore chute of the middle section, sliding to a lower-stage transport roadway, drawing a mine car by using an electric locomotive, delivering the mine car to a sliding breaking system, and lifting the mine car to the ground surface.
4. Filling in
After the first layer of the stope is mined, a reinforced concrete retaining wall and a chute are built, the concrete strength is C20, phi 18mm deformed steel bars are adopted, the mesh degree is 300mm multiplied by 300mm, the chute thickness is 500mm, the retaining wall thickness is 800mm, retaining wall reinforcing steel bars are welded on an ore rock anchor rod, the anchor rod is phi 40mm round steel, the length is 1.5m, the retaining wall is exposed for 0.5m, and a strainer is arranged in the retaining wall. And when the concrete reaches the strength, erecting a filling pipe from the upper middle section to a stope drop shaft for filling, controlling the concentration of filling slurry to be 68-75%, filling by adopting full tailings until the distance between the filling pipe and the stope drop shaft is 1.8m, and stopping filling. And after the filling water of the stope seeps out, carrying out second layered stoping, and after ore removal, carrying out filling again, so that layered circulating filling is carried out until the stope finishes filling.
Claims (8)
1. The underground mine layer-by-layer extrusion and smooth blasting mining method is characterized by comprising the following steps: the method comprises the following steps:
1) An upper plate air return roadway and a lower plate vein-following transportation roadway are arranged along the trend of the ore body, the lower plate vein-following transportation roadway is parallel to the trend of the ore body, an ore pass shaft is arranged on the other side of the lower plate vein-following transportation roadway, and veins vertical to the trend of the ore body are arranged at two ends of the ore body; the length of the stope is 40-100 m, the width is 5-20 m of the thickness of the ore body, and the height is 40-60 m; the stope mining adopts a mode of extruding smooth blasting layer by layer from bottom to top, and the mining height of each layer is 3-8 m;
2) Pedestrian patios are respectively arranged at two ends of the stope, and pedestrian communication channels which correspond to the stope positions on each layer one by one are arranged on the pedestrian patios; a filling well is arranged in the middle of the stope;
3) Carrying out extrusion smooth blasting on the first layer at the bottom of the stope: dividing a first layer at the bottom of a stope into two parts, performing extrusion blasting on one part, performing smooth blasting on a top plate of the part, performing ore removal on the part by using a scraper after blasting, performing extrusion blasting on the other part when the ore removal of the part is finished, performing smooth blasting on the top plate of the part, and performing ore removal on the part by using the scraper after blasting;
4) after the first layer of ore is removed from the bottom of the stope, constructing stope drop shafts of reinforced concrete at the positions, corresponding to the trisection of the length of the footwall stope, of the ore removal positions respectively, constructing reinforced concrete retaining walls at two ends of a cutting roadway, and arranging filter pipes in the reinforced concrete retaining walls; the bottom of the stope drop shaft is provided with a vibration ore drawing machine, and an ore conveying roadway is constructed at the position, close to the stope drop shaft, of the stope bottom; after the concrete meets the strength requirement, erecting a filling pipe in a filling well, filling the first layer at the bottom of the stope, and stopping filling when the filling reaches a position 1.8m away from the top plate of the first layer at the bottom of the stope;
5) After the water filled in the first layer at the bottom is seeped out, mining stopes layer by layer in a sequence from bottom to top, wherein the mining steps of each stope are as follows: the stope is divided into two parts for mining successively, one part is subjected to extrusion blasting, then the top plate of the part is subjected to smooth blasting, and a scraper is adopted for ore removal after blasting; when the ore removal of the part is finished, performing extrusion blasting on the other part, performing smooth blasting on the top plate of the part, and digging the ore of the stope to a stope drop shaft by using a rake after blasting; after ore removal of the stope of the layer in the step, constructing a reinforced concrete chute to extend to the position height 1.8m away from the top plate of the layer, constructing a reinforced concrete retaining wall on pedestrian communication roads at two ends of the stope, erecting a water filtering pipe in the retaining wall, filling when the concrete meets the design strength requirement, and stopping filling until the height of the position 1.8m away from the top plate of the layer is reached; and (4) after the filling water of the stope seeps out, repeating the steps to mine the ore of the previous layer, and thus mining layer by layer until the whole stope finishes mining.
2. The underground mine layer-by-layer extrusion and smooth blasting mining method according to claim 1, characterized in that: the extrusion blasting uses a filling well as a free surface, the space at the bottom of a stope is used as a supplement space for blasting ore falling, the ore is filled into the chute before each ore falling, and the ore covers the opening of the chute; when ore is removed, the scraper winch with the scraper bucket is adopted to scrape the ore which is collapsed after each layer of extrusion blasting to the stope drop shaft, the vibration ore drawing machine is adopted to put the ore in the stope drop shaft to the transport vehicle, the ore is conveyed to the ore drop shaft, and the ore is lifted to the ground surface after being crushed.
3. The underground mine layer-by-layer extrusion and smooth blasting mining method according to claim 1, characterized in that: the stope draw shaft is a vertical draw shaft or an inclined draw shaft.
4. The underground mine layer-by-layer extrusion and smooth blasting mining method according to claim 1, characterized in that: the cutting lane is a one-third three-center arch, and the section specification is as follows: the width x height is 3.0m x 2.5 m; constructing a pedestrian communication channel every 6m in the pedestrian sky well, wherein the section specification of each layer of pedestrian communication channel is as follows: width x height of 1.8m x 1.8 m; the ore conveying roadway is a one-third three-center arch, and the section specification is as follows: the width x height is 4.0m x 3.5 m; a filling well, the section specification of which is as follows: 1.8m × 1.8 m; the inner diameter of the stope drop shaft is 2.5m, and the concrete thickness of the stope drop shaft is 500 mm; the concrete thickness of the reinforced concrete retaining wall is 800 mm.
5. the underground mine layer-by-layer extrusion and smooth blasting mining method according to claim 1, characterized in that: when each layer of explosive is subjected to extrusion blasting, a YSP-45 rock drill is adopted to construct a vertical blast hole, the depth is 4m, the charging length is 3.2m, the hole plugging length is 0.8m, every 6 rows of same-section blasting are carried out, a plurality of rows of sectional micro-differential extrusion blasting are carried out, and the unit consumption of each ton of explosive is 0.36 kg; and when the top plate of each layer is subjected to smooth blasting, 4m long drill rods are adopted to perform smooth blasting row by row, the eye distance is 0.6m, the thickness is 0.5m, the smooth blasting is performed row by row until the boundary of a stope, and when the top plate is partially crushed, an anchor rod or an anchor net is supported.
6. the underground mine layer-by-layer extrusion and smooth blasting mining method according to claim 1, characterized in that: stope ventilation is required after each extrusion blasting and smooth blasting: fresh air flow enters the working face of the stope from the vein-following transportation lane and the through vein through the pedestrian raise, and dirty air enters the upper middle section return airway through the stope filling well and the pedestrian raise and is discharged out of the ground surface through the return airway.
7. The method of claim 1, wherein the ore blasted from the first layer at the bottom of the stope is removed by a 2m JCCY scraper and transported to an ore chute, and the ore removed from the remaining layers is removed by a 2 DPJ-30 KW scraper winch equipped with a 0.5m 3 scraper, the ore is scraped from the layers by a scraper, the ore from the stope chute is scraped to the chute, the ore from the stope chute is placed by a vibratory ore-drawing machine to a transport vehicle, transported to a middle ore chute, slid to a lower-stage transport roadway, and pulled by an electric locomotive to a chute system and lifted to the ground surface.
8. The underground mine layer-by-layer extrusion and smooth blasting mining method according to claim 1, characterized in that: after the first layer of ore removal at the bottom of the stope is finished, a reinforced concrete retaining wall and a stope chute are built, the concrete strength is C20, deformed steel bars with the diameter of 18mm are adopted, the mesh degree is 300mm multiplied by 300mm, the thickness of the stope chute is 500mm, the thickness of the retaining wall is 800mm, and filter pipes are arranged in the retaining wall; when the concrete reaches the strength, filling the concrete by arranging a filling pipe from a filling derrick, controlling the concentration of filling slurry to be 68-75%, filling the concrete by adopting full tailings until the concrete is 1.8m away from a first layer of top plate of a stope, and stopping filling; and after the filling water of the stope seeps out, carrying out second layered stoping, and after ore removal, carrying out filling again, so that layered circulating filling is carried out until the stope finishes filling.
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| CN101881169A (en) * | 2010-06-25 | 2010-11-10 | 东北大学 | A Mining Method of Segmented Ore Retaining and Caving Stage Empty Stop and Subsequent Filling |
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| AU2009236027B2 (en) * | 2009-05-20 | 2015-03-12 | Mti Group Pty Ltd | Collapsible Cushion |
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| CN101881169A (en) * | 2010-06-25 | 2010-11-10 | 东北大学 | A Mining Method of Segmented Ore Retaining and Caving Stage Empty Stop and Subsequent Filling |
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