CN111878081B - Stope blasting stoping method for middle-hole and shallow-hole combined construction - Google Patents
Stope blasting stoping method for middle-hole and shallow-hole combined construction Download PDFInfo
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- CN111878081B CN111878081B CN202010546717.1A CN202010546717A CN111878081B CN 111878081 B CN111878081 B CN 111878081B CN 202010546717 A CN202010546717 A CN 202010546717A CN 111878081 B CN111878081 B CN 111878081B
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- 238000005422 blasting Methods 0.000 title claims abstract description 67
- 238000000034 method Methods 0.000 title claims abstract description 49
- 238000010276 construction Methods 0.000 title claims abstract description 41
- 238000005553 drilling Methods 0.000 claims abstract description 78
- 239000011435 rock Substances 0.000 claims abstract description 62
- 238000005065 mining Methods 0.000 claims abstract description 19
- 238000009423 ventilation Methods 0.000 claims abstract description 4
- 238000005520 cutting process Methods 0.000 claims description 26
- 230000000903 blocking effect Effects 0.000 claims description 3
- 239000002360 explosive Substances 0.000 claims description 3
- 239000002699 waste material Substances 0.000 claims description 3
- 230000000977 initiatory effect Effects 0.000 claims description 2
- 239000000843 powder Substances 0.000 claims description 2
- 238000010790 dilution Methods 0.000 abstract description 5
- 239000012895 dilution Substances 0.000 abstract description 5
- 230000008878 coupling Effects 0.000 abstract 1
- 238000010168 coupling process Methods 0.000 abstract 1
- 238000005859 coupling reaction Methods 0.000 abstract 1
- 125000004122 cyclic group Chemical group 0.000 abstract 1
- 238000010586 diagram Methods 0.000 description 2
- 238000000605 extraction Methods 0.000 description 2
- 238000004140 cleaning Methods 0.000 description 1
- 238000004519 manufacturing process Methods 0.000 description 1
- 238000011084 recovery Methods 0.000 description 1
- 238000004064 recycling Methods 0.000 description 1
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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
- E21C41/22—Methods of underground mining; Layouts therefor for ores, e.g. mining placers
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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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- 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
- E21F15/02—Supporting means, e.g. shuttering, for filling-up materials
- E21F15/04—Stowing mats; Goaf wire netting; Partition walls
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F42—AMMUNITION; BLASTING
- F42D—BLASTING
- F42D1/00—Blasting methods or apparatus, e.g. loading or tamping
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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 stope blasting stoping method for middle-hole and shallow-hole combined construction, which comprises the following steps: 1. constructing a rock drilling roadway in a stope; 2. drilling middle holes in rock drilling roadway construction, wherein the middle holes comprise roadway top middle holes and sector arrangement middle holes, and the diameter of each middle hole is 65 mm; 3. shallow holes with the diameter of 42mm are arranged below the height of the machine core; 4. the charge and the stuffing adopt a discontinuous coupling charge structure; 5. detonating, namely performing differential blasting, wherein 1-3 rows of mesopores are blasted each time, and 1-2 rows of mesopores are blasted in advance in shallow holes; 6. ore removal, wherein ore removal is started after blasting and ventilation; 7. and blasting again and performing cyclic operation. The stope stoping method adopts an upward small-section open stoping subsequent filling mining method, utilizes the existing middle-hole and shallow-hole construction equipment to construct blast holes, adopts a middle-hole combined shallow-hole blasting method to carry out stope stoping, and has the advantages of high stoping safety, low loss and dilution rate, high stoping efficiency and the like.
Description
Technical Field
The invention relates to the technical field of mine mining, in particular to a stope blast hole construction and blasting stoping method combining medium hole construction and shallow hole construction.
Background
In mine production, the conditions of poor stability, poor structure, joint development and the like of the surrounding rocks of the mine are often encountered, and the ore value is higher and the mining difficulty is higher. The stoping by adopting the traditional open stope or caving method causes large loss and dilution indexes and large economic loss, and the stoping by adopting the upward horizontal layered filling stoping method causes the problems of poor stoping safety, low stoping efficiency and the like.
The problems of serious collapse of a stope, uncontrollable loss and dilution indexes and the like can be caused just by adopting the traditional open stope or caving method for stoping, so that a great deal of economic loss is caused; and the problems of poor stoping safety, complex stoping process, high mining cost, low stoping efficiency and the like can be caused by adopting an upward or downward horizontal layered filling mining method for stoping. Therefore, a new extraction method needs to be developed to solve the problems of the above methods.
Disclosure of Invention
The invention aims to solve the technical problem of the prior art, and provides a stope blasting stoping method which adopts an upward small-subsection open stoping subsequent filling mining method, utilizes the existing middle-hole and shallow-hole construction equipment to construct blast holes, has the advantages of high stoping safety, low loss dilution rate, high stoping efficiency and the like, and adopts middle-hole combined shallow-hole construction.
In order to solve the technical problems, the invention adopts the following technical scheme: a stope blasting stoping method for middle-hole and shallow-hole combined construction is characterized by comprising the following steps: comprises the following steps of (a) carrying out,
the method comprises the following steps: constructing a rock drilling roadway in a stope;
step two: and (3) mesoporous construction:
1) constructing blast holes at the top of a rock drilling roadway, wherein the blast holes at the top of all the roadway are vertical upward holes, the diameter of each blast hole is 60-70mm, and the blast holes are drilled in rows in the direction vertical to the rock drilling roadway;
2) constructing fan-shaped blast holes of the rock drilling roadway, wherein the fan-shaped blast holes are also drilled according to rows, the row surfaces of the blast holes are vertical to the direction of the rock drilling roadway, the blast holes in the same row are arranged in a fan shape, and the diameter of the blast holes is 60-70 mm;
step three: shallow hole construction, namely drilling horizontal shallow holes along the side walls of two sides of the rock drilling lane, wherein the diameter of each shallow hole is 42-50mm, the shallow holes are drilled in rows, and the row surface of each shallow hole is vertical to the direction of the rock drilling lane;
step four: loading, wherein the middle hole is discontinuously coupled, the hole opening is filled with stemming, the filling length is not less than 0.5m, and at least one initiating explosive packet is filled at the hole bottom; the shallow hole is filled with coupled powder, the hole opening is filled with stemming, and the blocking length is not less than 0.3 m;
step five: blasting a network and detonating, wherein the blasting adopts differential blasting, the middle holes adopt the same-row same-section arrangement mode, the holes in the same section are connected by using detonating tube detonators, and the detonating tubes in all the holes are detonated after being collected, and 2-3 rows are blasted each time; the shallow holes are arranged in the same row and the same section, the holes in the same section are connected by detonating tube detonators, and the detonating tubes in all the holes are detonated after being collected, and 3-9 rows are blasted each time;
step six: ore removal, wherein ore removal operation is started after blasting and ventilation, and the ore removal amount is 55-65% of the blasting caving amount each time;
step seven: and (5) blasting again, and performing next blasting after finishing one ore removal, and sequentially performing cycle operation.
During the middle hole construction, the tunnel top blast holes of the rock drilling tunnel are drilled by an YGZ-90 type drilling machine, the depth of the blast holes is 7-8m, the distance between the blast holes is 0.5-0.8m, and the row distance between two adjacent rows of blast holes is 0.4-0.6 m.
During the middle hole construction, fan-shaped blast holes of the rock drilling roadway are drilled according to fan-shaped arrangement by adopting an YGZ-90 type drilling machine, the height of a machine core is 1.0-1.4m, the depth of the blast holes is 2-11m, the angle of the blast holes is 5-175 degrees, the bottom distance of the blast holes is 1.5-1.8m, and the row distance of two adjacent rows of blast holes is 1.2-1.8 m.
The fan-shaped blast holes of the rock drilling roadway are divided into odd rows and even rows, each row comprises 9 blast holes, and the blast holes in the odd rows and the blast holes in the even rows are arranged in a staggered manner; the method comprises the following steps that (1) odd rows of blast holes are gradually increased from the right side wall of a rock drilling tunnel in an anticlockwise mode at an angle of 5 degrees until the left side wall of the rock drilling tunnel is finished at 170 degrees, wherein the odd rows of blast holes are drilled on the right side wall, 2 blast holes are drilled on the left side wall, and 4 blast holes are drilled on the top of the rock drilling tunnel; the blast holes in the even rows gradually increase from the right side wall of the drilling tunnel in an anticlockwise direction at an angle of 10 degrees until the left side wall of the drilling tunnel is finished at 175 degrees; wherein, 2 blast holes are drilled on the right side wall of the even number row, 3 blast holes are drilled on the left side wall, and 4 blast holes are drilled on the top of the rock drilling roadway.
The stope is arranged along the trend of the ore body or perpendicular to the trend of the ore body, the rock drilling roadway is arranged in the middle of the stope, and the rock drilling roadway construction adopts a rock drilling trolley or hand holding drill construction; the rock drilling roadway is located in the horizontal middle position of the stope bottom plate, the cross section of the rock drilling roadway is 3 x 3m, and the roadway top of the rock drilling roadway is 1/3 circular arc arches.
When shallow hole construction is carried out, blast holes are drilled by using an YT-28 type drilling machine, all the blast holes are horizontal holes, the depth of each blast hole is 1-2m, the row spacing of the blast holes is 0.4-0.6m, the hole spacing is 0.4-0.6m, the blast holes in the lowest row are basically flush with the stope bottom plate, and the position of the shallow hole in the highest row is not higher than the middle hole in the lowest row.
After the rock drilling lane is constructed, a cutting lane of 2.5 multiplied by 3m is constructed on a wall mining width boundary on a stope along the mining width direction, the cutting lane is positioned at one end of the rock drilling lane, and the moving direction of the cutting lane is perpendicular to the moving direction of the rock drilling lane.
And constructing a cutting well with the height of 7-8m and the length of 2.5 multiplied by 2m at the end part of one side of the cutting lane, wherein the cutting well is vertically upward.
The middle hole is discontinuously coupled and charged by adopting a BQF-100 type charging device, and the non-charging area in the hole is filled and compacted by adopting waste newspaper or stemming; after blasting of all blast holes in the stope is finished, 2m is adopted3The remote control scraper cleans the residual ores in the stope, and builds a retaining wall and then fills the retaining wall after the mine is cleaned. And after the filling is finished for 28 days, the next stope circulation operation is carried out on the filling body.
In the fifth step, adopting millisecond differential blasting of a detonating tube, namely: each row of holes is a group, and the sections of the detonating tube detonators are the same; detonating in each hole by adopting a double-detonator mode, and adopting millisecond second delay detonators, wherein two adjacent sections are separated, and the delay time is 50 milliseconds; the same level holes are connected by adopting detonating cords; the shallow hole blasting array surface is flush with the middle hole array surface.
The method is suitable for safely and efficiently recycling the ore bodies with poor stability of the ore-bearing surrounding rock and high mine value, and compared with the traditional shallow hole or middle hole stope stoping method, the method has the advantages that:
1. compared with the method for mining shallow holes by filling up horizontal layers, the method has the advantages that staff and equipment do not need to perform headspace operation, and the mining safety is high;
2. compared with a mesopore ore-breaking mining method, the exposed area of the roof of the stope is small, the roof is stable, the bottom pillar is recovered during mesopore blasting through shallow hole construction, and the loss and dilution rate is low;
3. the method is suitable for ore body recovery under various occurrence conditions, and has strong applicability;
4. by adopting the middle-hole combined shallow hole blasting and stoping, the stoping efficiency is high, and the stoping safety is high;
5. the construction is convenient, and the prior art level and equipment can be directly utilized.
Therefore, the invention can be popularized and used in the process of mining high-value broken difficult-to-mine ore bodies.
Drawings
Fig. 1 is a schematic view of a stope ranking arrangement according to an embodiment of the present invention;
fig. 2 is a schematic diagram of arrangement of gun holes of a combination of shallow holes and medium holes, in which a is arrangement of odd-numbered rows of gun holes, b is arrangement of even-numbered rows of gun holes, and all of 1 to 9 in the diagram are medium holes.
Detailed Description
The present invention is further illustrated by the following embodiments with reference to fig. 1 and fig. 2, and the structures or processes not specifically illustrated are all prior art in the field.
The stope blasting stoping method for the middle-hole and shallow-hole combined construction is carried out according to the following steps,
the method comprises the following steps: mining division is carried out according to the occurrence conditions of ore bodies, the mining range of a stope is 30 multiplied by 6 multiplied by 10.5m (length multiplied by width multiplied by height), a rock drilling roadway of 3 multiplied by 3m (the length is determined according to the mining range, such as 55m, and two-time extraction) is constructed in the middle of the horizontal floor of the stope, and the top of the roadway is 1/3 circular arc arches.
Step two: and (4) constructing a cutting roadway, namely constructing the cutting roadway of 2.5 multiplied by 3m on the wall mining width boundary of the stope along the mining width direction.
Step three: and (3) constructing a cutting well, namely constructing a cutting well with the inclination angle of 90 degrees, namely, the cutting well is vertically upward and the height of the cutting well is 7.5m at the end part of one side of the cutting roadway. The cutting well is used as a compensation space of the cutting lane, and a free space is provided for blasting of the cutting lane; the cutting lane has the functions of serving as a blast hole construction operation surface in the cutting lane and providing a compensation space for blasting of the cutting lane; a certain space is formed after blasting of the cutting lane, and the space is used as a compensation space for blasting of a chamber (blast hole blasting in a rock drilling lane) to provide a free space for blasting of the chamber.
Step four: and (3) drilling a blast hole at the top of the rock drilling lane by adopting an YGZ-90 type drilling machine, wherein the depth of the blast hole is 7.5m, and the diameter of the drilled hole is 65 mm. All the drill holes are vertical upward holes, the distance between blast holes is 0.6m, and the row spacing is 0.5 m.
Step five: and (3) carrying out mesopore construction, namely chiseling a vertical fan-shaped blast hole by using an YGZ-90 type drilling machine, wherein the row surface of the blast hole is vertical to the direction of a rock drilling roadway, the height of a machine core is 1.2m, the depth of the blast hole is 2-11m, the diameter of the blast hole is 65mm, the angle of the blast hole is 5-175, the bottom distance of the blast hole is 1.5-1.8m, and the row distance is 1.5 m. The blast hole array is divided into odd-numbered rows and even-numbered rows, each row comprises 9 blast holes, and the blast holes in the odd-numbered rows and the blast holes in the even-numbered rows are arranged in a staggered manner; the method comprises the following steps that (1) odd rows of blast holes are gradually increased from the right side wall of a rock drilling tunnel in a counterclockwise direction at an angle of 5 degrees (1 st) until the left side wall of the rock drilling tunnel is finished at 170 degrees (9 th), wherein the odd rows are drilled with 3 blast holes on the right side wall, 2 blast holes on the left side wall and 4 blast holes on the top of the rock drilling tunnel; the blast holes in the even rows gradually increase from the right side wall of the drilling tunnel at an angle of 10 degrees (1 st) along the anticlockwise direction until ending at 175 degrees (9 th) at the left side wall of the drilling tunnel; wherein, 2 blast holes are drilled on the right side wall of the even number row, 3 blast holes are drilled on the left side wall, and 4 blast holes are drilled on the top of the rock drilling roadway.
Step six: and (2) shallow hole construction, namely drilling blast holes on the side walls of two sides of the rock drilling roadway by adopting an YT-28 type drilling machine, wherein the blast hole direction is vertical to the rock drilling roadway direction, all blast holes are horizontal holes, the depth of each blast hole is 1.5m, the diameter of each blast hole is 42mm, the row spacing of the blast holes is 0.5m, the hole spacing is 0.5m, the bottom row of blast holes are basically flush with the stope bottom plate, the position of the top row of shallow holes is not higher than the middle hole of the bottom, and the shallow holes are actually drilled at the position of the machine core below 1.2 m.
Step seven: and (3) charging, wherein the middle hole is discontinuously coupled and charged by adopting a BQF-100 type charging machine, and the non-charging area in the hole is filled and compacted by adopting waste newspaper or stemming. The hole opening is filled with stemming, and the filling length is not less than 0.5 m. A detonating cartridge is filled at the bottom of the hole; the shallow hole adopts coupled charging, explosive is manually filled, and the blocking length is not less than 0.3 m.
Step eight: blasting network and blasting, wherein the blasting adopts differential blasting, the middle holes adopt the same row and same section arrangement mode, and the holes in the same section are connected by detonating tube detonators. Detonating after all detonating tubes in the holes are collected, and blasting 2-3 rows each time; the shallow holes are arranged in the same row and the same section, and the holes in the same section are connected by detonating tubes and detonators. And detonating after all the detonating tubes in the holes are collected, and blasting 3-9 rows each time.
Step nine: ore removal is carried out, ore removal operation is started after blasting and ventilation, and ore removal is carried out by 2m3And (4) ore removal is carried out by the remote control scraper, and the ore removal amount is 60% of the blasting caving ore amount each time.
Step ten: and (5) blasting again, and performing next blasting after ore removal is finished, and performing cycle operation in sequence.
Step eleven: after blasting of all blast holes of the stope is finished, a remote control scraper is used for cleaning residual ores in the stope, and after the mine is cleaned, a retaining wall is built and then filling is carried out.
Step twelve: and after the filling is finished for 28 days, the next stope circulation operation is carried out on the filling body.
The present invention has been described in detail, and it should be understood that the detailed description and specific examples, while indicating the preferred embodiment of the invention, are intended for purposes of illustration only and are not intended to limit the scope of the invention.
Claims (10)
1. A stope blasting stoping method for middle-hole and shallow-hole combined construction is characterized by comprising the following steps: comprises the following steps of (a) carrying out,
the method comprises the following steps: constructing a rock drilling roadway in a stope;
step two: and (3) mesoporous construction:
1) constructing blast holes at the top of a rock drilling roadway, wherein the blast holes at the top of all the roadway are vertical upward holes, the diameter of each blast hole is 60-70mm, and the blast holes are drilled in rows in the direction vertical to the rock drilling roadway;
2) constructing fan-shaped blast holes of the rock drilling roadway, wherein the fan-shaped blast holes are also drilled according to rows, the row surfaces of the blast holes are vertical to the direction of the rock drilling roadway, the blast holes in the same row are arranged in a fan shape, and the diameter of each blast hole is 60-70 mm;
step three: shallow hole construction, namely drilling horizontal shallow holes along the side walls of two sides of the rock drilling lane, wherein the diameter of each shallow hole is 42-50mm, the shallow holes are drilled in rows, and the row surface of each shallow hole is vertical to the direction of the rock drilling lane;
step four: loading, wherein the middle hole is discontinuously coupled, the hole opening is filled with stemming, the filling length is not less than 0.5m, and at least one initiating explosive packet is filled at the hole bottom; the shallow hole is filled with coupled powder, the hole opening is filled with stemming, and the blocking length is not less than 0.3 m;
step five: blasting a network and detonating, wherein the blasting adopts differential blasting, the middle holes adopt the same-row same-section arrangement mode, the holes in the same section are connected by using detonating tube detonators, and the detonating tubes in all the holes are detonated after being collected, and 2-3 rows are blasted each time; the shallow holes are arranged in the same row and the same section, the holes in the same section are connected by detonating tube detonators, and the detonating tubes in all the holes are detonated after being collected, and 3-9 rows are blasted each time;
step six: ore removal, wherein ore removal operation is started after blasting and ventilation, and the ore removal amount is 55-65% of the blasting caving amount each time;
step seven: and (5) blasting again, and performing next blasting after finishing one ore removal, and sequentially performing cycle operation.
2. The stope blasting stoping method for medium-hole combined shallow-hole construction according to claim 1, wherein the stope blasting stoping method comprises the following steps: during the middle hole construction, the tunnel top blast holes of the rock drilling tunnel are drilled by an YGZ-90 type drilling machine, the depth of the blast holes is 7-8m, the distance between the blast holes is 0.5-0.8m, and the row distance between two adjacent rows of blast holes is 0.4-0.6 m.
3. The stope blasting stoping method for medium-hole combined shallow-hole construction according to claim 1, wherein the stope blasting stoping method comprises the following steps: during the middle hole construction, fan-shaped blast holes of the rock drilling roadway are drilled according to fan-shaped arrangement by adopting an YGZ-90 type drilling machine, the height of a machine core is 1.0-1.4m, the depth of the blast holes is 2-11m, the angle of the blast holes is 5-175 degrees, the bottom distance of the blast holes is 1.5-1.8m, and the row distance of two adjacent rows of blast holes is 1.2-1.8 m.
4. The stope blasting stoping method for medium-hole combined shallow-hole construction according to claim 3, wherein the stope blasting stoping method comprises the following steps: the fan-shaped blast holes of the rock drilling lane are divided into odd rows and even rows, each row comprises 9 blast holes, and the odd rows of blast holes and the even rows of blast holes are arranged in a staggered manner; the method comprises the following steps that (1) odd rows of blast holes are gradually increased from the right side wall of a rock drilling tunnel in an anticlockwise mode at an angle of 5 degrees until the left side wall of the rock drilling tunnel is finished at 170 degrees, wherein the odd rows of blast holes are drilled on the right side wall, 2 blast holes are drilled on the left side wall, and 4 blast holes are drilled on the top of the rock drilling tunnel; the even rows of blast holes gradually increase from the right side wall of the rock drilling tunnel along the anticlockwise direction at an angle of 10 degrees until the left side wall of the rock drilling tunnel is finished at 175 degrees; wherein, 2 blast holes are drilled on the right side wall of the even number row, 3 blast holes are drilled on the left side wall, and 4 blast holes are drilled on the top of the rock drilling roadway.
5. The stope blasting stoping method for medium-hole combined shallow-hole construction according to any one of claims 1 to 4, wherein: the stope is arranged along the trend of the ore body or perpendicular to the trend of the ore body, the rock drilling roadway is arranged in the middle of the stope, and the rock drilling roadway construction adopts a rock drilling trolley or hand holding drill construction; the rock drilling roadway is located in the horizontal middle position of the stope bottom plate, the cross section of the rock drilling roadway is 3 x 3m, and the roadway top of the rock drilling roadway is 1/3 circular arc arches.
6. The stope blasting stoping method for medium-hole combined shallow-hole construction according to claim 5, wherein the stope blasting stoping method comprises the following steps: when shallow hole construction is carried out, blast holes are drilled by using an YT-28 type drilling machine, all the blast holes are horizontal holes, the depth of each blast hole is 1-2m, the row spacing of the blast holes is 0.4-0.6m, the hole spacing is 0.4-0.6m, the blast holes in the lowest row are basically flush with the stope bottom plate, and the position of the shallow hole in the highest row is not higher than the middle hole in the lowest row.
7. The stope blasting stoping method for medium-hole combined shallow-hole construction according to claim 5, wherein the stope blasting stoping method comprises the following steps: after the rock drilling lane is constructed, a cutting lane of 2.5 multiplied by 3m is constructed on a wall mining width boundary on a stope along the mining width direction, the cutting lane is positioned at one end of the rock drilling lane, and the moving direction of the cutting lane is perpendicular to the moving direction of the rock drilling lane.
8. The stope blasting stoping method for medium-hole combined shallow-hole construction according to claim 7, wherein the stope blasting stoping method comprises the following steps: and constructing a cutting well with the height of 7-8m at the end part of one side of the cutting roadway, wherein the cutting well is 2.5 multiplied by 2m and is vertically upward.
9. The stope blasting stoping method for medium-hole combined shallow-hole construction according to claim 1, wherein the stope blasting stoping method comprises the following steps: the middle hole is discontinuously coupled and charged by adopting a BQF-100 type charging device, and the non-charging area in the hole is filled and compacted by adopting waste newspaper or stemming; after blasting, 2m was used3The remote control scraper of (1) ore removal.
10. The stope blasting stoping method for medium-hole combined shallow-hole construction according to claim 1, characterized in that: in the fifth step, adopting millisecond differential blasting of a detonating tube, namely: each row of holes is a group, and the sections of the detonating tube detonators are the same; detonating in each hole by adopting a double-detonator mode, and adopting millisecond second delay detonators, wherein two adjacent sections are separated, and the delay time is 50 milliseconds; the same level holes are connected by adopting detonating cords; the shallow hole blasting array surface is flush with the middle hole array surface.
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