CN109489510A - A kind of method of mine shaft recovery project borehole wall fluting explosion - Google Patents
A kind of method of mine shaft recovery project borehole wall fluting explosion Download PDFInfo
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- CN109489510A CN109489510A CN201910009577.1A CN201910009577A CN109489510A CN 109489510 A CN109489510 A CN 109489510A CN 201910009577 A CN201910009577 A CN 201910009577A CN 109489510 A CN109489510 A CN 109489510A
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- blasthole
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- borehole wall
- explosion
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Classifications
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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
-
- 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
Abstract
The invention discloses a kind of methods of mine shaft recovery project borehole wall fluting explosion, method includes the following steps: step 1, burst region and firing order divide；Step 2 slotting area blasting parameter design；The area step 3 Kuo Shua blasting parameter design；The area step 4 Guang Bao blasting parameter design；Step 5 design of firing circuit.Compared with traditional horizontal cut, vertical slotting can realize free face apart from short as early as possible, on retain the borehole wall influence it is small.
Description
Technical field
The invention belongs to construction engineering technical fields, are related to a kind of side of mine shaft recovery project borehole wall fluting explosion
Method.
Background technique
Although coal in China production mechanization degree has large increase, since geological conditions etc. limits, coal production
Also from not explosive blasting.Underground coal mine production explosive used mainly includes mining explosive, detonator, exploder.In order to
Guarantee safety, prevent blasted material to scatter and disappear and cause the accident, in the prior art, is badly in need of a kind of mine shaft recovery project borehole wall fluting
The method of explosion.
Summary of the invention
The purpose of the present invention is to provide a kind of methods of mine shaft recovery project borehole wall fluting explosion.Its particular technique
Scheme are as follows:
A kind of method of mine shaft recovery project borehole wall fluting explosion, comprising the following steps:
Step 1, burst region and firing order divide
Broken wall slot area is divided into boundary blast area and caved area, boundary blast area arrangement two along pit shaft vertical direction
Artillery salvo hole, respectively in the up-and-down boundary of pit shaft fluting；Caved area arranges six artillery salvo holes in the vertical direction；Along pit shaft horizontal direction
Caved area is divided into two major parts, respectively slotting area and the area Kuo Shua；
Step 2 slotting area blasting parameter design
1. steel for shot form
Using vertical slotting, pit shaft vertical direction and horizontal direction respectively arrange six artillery salvo holes, and steel for shot form uses three
Flower hole arranges that blasthole spacing is 200mm in horizontal direction, and 3rd area of top uses inclined drill, and blasthole inclination angle is 19 °, and blasthole is long
Degree is 720mm；2nd area of top uses inclined drill, and blasthole inclination angle is 7 °, and blasthole length is 680mm；Other blastholes are all using vertical
The drilling of straight well wall, blasthole length is 680mm；
2. single hole explosive payload
Blast hole projectile filling uses 3# water gel explosives for mine, explosive parameter are as follows: and 250g/ volumes of quality, length 300mm, medicine
Coil diameter is 35mm；Blasthole length is 680mm and two kinds of 720mm, takes spaced loading method.
Single hole explosive payload is calculated as follows:
Q=abhq
In formula: a-blasthole spacing, m；
B-blasthole array pitch, m；
H-concrete thickness, m；
Q-unit concrete explosion explosive consumption, g/m3。
Single hole explosive payload: Q1=abhq=0.2 × 0.22 × 0.80 × 5100=180g.
3. charge constitution
In order to make explosive arrangement uniformly, prevent explosive from its closer barrel of adjusting the distance being concentrated to damage using stemming interval
Charge constitution, 3 packs of each blast hole charging, single pack quality 60g, cartridge length 75mm, stemming gap length 90mm；
4. pack makes
Slotting area explosive payload is 180g, standard powder stick is cut into four parts, each pack quality is 60g, will be cut
Good powder stick is put into the kraft paper bag made.
The area step 3 Kuo Shua blasting parameter design
After the completion of the vertical slotting of the borehole wall, explosion is carried out to two sides from slot area and expands brush, until all boreholes wall all expand brush
It completes.
1. steel for shot
Pit shaft vertical direction arranges six artillery salvo holes, each every time at left and right sides of slotting area in pit shaft horizontal direction to arrange three artillery salvos
Hole, horizontal direction steel for shot form arrange that blasthole spacing is 200mm, top first row in horizontal direction using three flower holes
Blasthole uses inclined drill, and blasthole inclination angle is 19 °, and blasthole length is 720mm；Second row blasthole uses inclined drill, and blasthole is inclined
Angle is 7 °, and blasthole length is 680mm；Remaining four artillery salvo hole is all drilled using the vertical borehole wall, and blasthole length is 680mm；
2. single hole explosive payload
Blast hole projectile filling uses 3# water gel explosives for mine, explosive parameter are as follows: and 250g/ volumes of quality, length 300mm, medicine
Coil diameter is 35mm；Blasthole length is 680mm and two kinds of 720mm, takes spaced loading method.
Single hole explosive payload is calculated as follows:
Q=abhq
In formula: a-blasthole spacing, m；
B-blasthole array pitch, m；
H-concrete thickness, m；
Q-unit concrete explosion explosive consumption, g/m3。
Single hole explosive payload: Q1=abhq=0.2 × 0.22 × 0.80 × 5100=180g.
3. charge constitution
In order to make explosive arrangement uniformly, prevent explosive from its closer barrel of adjusting the distance being concentrated to damage using stemming interval
Charge constitution, 3 packs of each blast hole charging, single pack quality 60g, cartridge length 75mm, stemming gap length 90mm,
Middle and upper part first row blasthole aperture stemming length is adjusted to 390mm.
4. pack makes
Slotting area explosive payload is 180g, standard powder stick is cut into four parts, each pack quality is 60g, will be cut
Good powder stick is put into the kraft paper bag made.
The area step 4 Guang Bao blasting parameter design
The borehole wall expands after the completion of brush, carries out explosion to the periphery hole in the area Liang Geguangbao above and below the borehole wall, entire borehole wall periphery hole is total
Explosion is carried out in three times, and two rows periphery hole detonates simultaneously.
1. steel for shot
Pit shaft up-and-down boundary respectively arranges two rows of light blast holes, and pitch of holes is 150mm, is bored along light blast hole using inclination on the borehole wall
Hole, blasthole inclination angle are 19 °, and blasthole length is 720mm, and borehole wall lower edge light blast hole uses horizontal drilling, drillable length 680m.
2. blast hole projectile filling uses 3# water gel explosives for mine, explosive parameter are as follows: 330g/ volumes of quality, powder stick diameter is
27mm；Blasthole length is 680mm and two kinds of 720mm, takes spaced loading method.
Single hole explosive payload is calculated as follows:
Q=abhq
In formula: a-blasthole spacing, m；
B-blasthole array pitch, m；
H-concrete thickness, m；
Q-unit concrete explosion explosive consumption, g/m3。
Single hole explosive payload: Q1=abhq=0.15 × 0.22 × 0.80 × 4600=121g, takes 120g.
3. charge constitution
Using stemming spaced loading structure, 3 packs of each blast hole charging, single pack quality 40g, cartridge length
50mm, stemming gap length 90mm.
4. pack makes
Slotting area explosive payload is 120g, standard powder stick is cut into 8 parts, each pack quality is 40g, by well cutting
Powder stick be put into the kraft paper bag made.
Step 5 design of firing circuit
Using electric detonator initiation network, including detonator, conducting wire, detonating power supply and blasthole.
Further, in step 1, the caved area blasthole spacing is 200mm, and the area Guang Bao blasthole spacing is 150mm.
Slotting sector width is 1.0m, is highly 1.2m, and vertically and horizontally the upper blasthole number of rows detonated is six
Row.It detonates every time in the area Kuo Shua horizontal direction six artillery salvo holes, slotting area each side three row, detonate on vertical direction six artillery salvos
Hole, expanding brush direction is gradually to be extended from slotting area to two sides.Explosion is carried out to the area Guang Bao after to caved area whole explosion, on
The area lower Liang Geguangbao is divided into three separate explosions, and every separate explosion perimeter is 5m, and blasting hole number of rows is two rows, and the blasthole of drainpipe side is most
After detonate.
Further, in step 5, all detonators all use parallel connection, and the detonating power supply uses 380V AC power source.
Further, active defense measure and equipment, facility specific shield measure are additionally provided with.
Further, the composite protective device that the active defense measure is formed using rhombus net and the double-deck waste and old belt,
For covering blasting hole.Composite protective device height, which is greater than, removes borehole wall height at least 1.0m, and is fixed on expansion bolt
The upper and lower of the pre-demolition borehole wall, while flanging channel steel is set.
Further, the equipment, facility specific shield measure include Grouting Pipe, drainpipe protection, shaft bottom lateral duct
Protection, borehole wall cable protective, outer shaft wall safeguard measure, hanging scaffold and signal, illumination protect and the protection of truss girder.
Compared with prior art, beneficial effects of the present invention:
1. compared with traditional horizontal cut, vertical slotting can be realized free face, influenced on the borehole wall is retained as early as possible apart from short
It is small.
2. slotting area is using interval Uncoincided charge, millisecond detonating in each keyhole, each subregion successively millisecond detonating, hole
Interior elementary errors not only increases blast hole utilizing factor with the detonation mode that subregion elementary errors combines, and realizes safely controllable explosion
Effect provides safeguard for the explosion in the area Kuo Shua and the area Guang Bao.
3. the successful application of the technology keeps rupture Shaft repair engineering more quick, safe, the safety for increasing coal mine is raw
The time is produced, brings good economic benefit and social benefit to society.
Detailed description of the invention
Fig. 1 burst region divides schematic diagram (main view)；
Fig. 2 burst region divides schematic diagram (side view)；
Fig. 3 slotting area blasthole subregion layout drawing, wherein 1 pack ms2 sections of area bottom detonator, in, top be ms1 sections of detonators；
2 pack ms3 sections of area bottom detonators, in, top be ms2 sections of detonators；3 pack ms5 sections of area bottom detonators, in, top be ms3 sections of thunders
Pipe；
The area Tu4Kuo Shua blasthole subregion layout drawing, wherein 1st area is ms1 sections of detonators；2nd area are ms2 sections of detonators；3rd area are equal
For ms3 sections of detonators；4th area are ms5 sections of detonators；
The area Tu5Guang Bao blasthole subregion layout drawing, wherein pack is ms5 sections of detonators in the area Guang Bao blasthole.
Specific embodiment
Technical solution of the present invention is described in more detail with specific embodiment with reference to the accompanying drawing.
A kind of method of mine shaft recovery project borehole wall fluting explosion, comprising the following steps:
Step 1, burst region and firing order divide, specific as shown in Figure 1 and Figure 2；
Broken wall slot area is divided into boundary blast area and caved area, boundary blast area arrangement two along pit shaft vertical direction
Artillery salvo hole, respectively in the up-and-down boundary of pit shaft fluting；Caved area arranges six artillery salvo holes in the vertical direction；Along pit shaft horizontal direction
Caved area is divided into two major parts, respectively slotting area and the area Kuo Shua；
Step 2 slotting area blasting parameter design
1. steel for shot form is as shown in Figure 3；
Using vertical slotting, pit shaft vertical direction and horizontal direction respectively arrange six artillery salvo holes, and steel for shot form uses three
Flower hole arranges that blasthole spacing is 200mm in horizontal direction, and 3rd area of top uses inclined drill, and blasthole inclination angle is 19 °, and blasthole is long
Degree is 720mm；2nd area of top uses inclined drill, and blasthole inclination angle is 7 °, and blasthole length is 680mm；Other blastholes are all using vertical
The drilling of straight well wall, blasthole length is 680mm；
2. single hole explosive payload
Blast hole projectile filling uses 3# water gel explosives for mine, explosive parameter are as follows: and 250g/ volumes of quality, length 300mm, medicine
Coil diameter is 35mm；Blasthole length is 680mm and two kinds of 720mm, takes spaced loading method.
Single hole explosive payload is calculated as follows:
Q=abhq
In formula: a-blasthole spacing, m；
B-blasthole array pitch, m；
H-concrete thickness, m；
Q-unit concrete explosion explosive consumption, g/m3。
Single hole explosive payload: Q1=abhq=0.2 × 0.22 × 0.80 × 5100=180g.
3. charge constitution
In order to make explosive arrangement uniformly, prevent explosive from its closer barrel of adjusting the distance being concentrated to damage using stemming interval
Charge constitution, 3 packs of each blast hole charging, single pack quality 60g, cartridge length 75mm, stemming gap length 90mm；
4. pack makes
Slotting area explosive payload is 180g, standard powder stick is cut into four parts, each pack quality is 60g, will be cut
Good powder stick is put into the kraft paper bag made.
The area step 3 Kuo Shua blasting parameter design, as shown in Figure 4；
After the completion of the vertical slotting of the borehole wall, explosion is carried out to two sides from slot area and expands brush, until all boreholes wall all expand brush
It completes.
2. steel for shot
Pit shaft vertical direction arranges six artillery salvo holes, each every time at left and right sides of slotting area in pit shaft horizontal direction to arrange three artillery salvos
Hole, horizontal direction steel for shot form arrange that blasthole spacing is 200mm, top first row in horizontal direction using three flower holes
Blasthole uses inclined drill, and blasthole inclination angle is 19 °, and blasthole length is 720mm；Second row blasthole uses inclined drill, and blasthole is inclined
Angle is 7 °, and blasthole length is 680mm；Remaining four artillery salvo hole is all drilled using the vertical borehole wall, and blasthole length is 680mm；
2. single hole explosive payload
Blast hole projectile filling uses 3# water gel explosives for mine, explosive parameter are as follows: and 250g/ volumes of quality, length 300mm, medicine
Coil diameter is 35mm；Blasthole length is 680mm and two kinds of 720mm, takes spaced loading method.
Single hole explosive payload is calculated as follows:
Q=abhq
In formula: a-blasthole spacing, m；
B-blasthole array pitch, m；
H-concrete thickness, m；
Q-unit concrete explosion explosive consumption, g/m3。
Single hole explosive payload: Q1=abhq=0.2 × 0.22 × 0.80 × 5100=180g.
3. charge constitution
In order to make explosive arrangement uniformly, prevent explosive from its closer barrel of adjusting the distance being concentrated to damage using stemming interval
Charge constitution, 3 packs of each blast hole charging, single pack quality 60g, cartridge length 75mm, stemming gap length 90mm,
Middle and upper part first row blasthole aperture stemming length is adjusted to 390mm.
4. pack makes
Slotting area explosive payload is 180g, standard powder stick is cut into four parts, each pack quality is 60g, will be cut
Good powder stick is put into the kraft paper bag made.
The area step 4 Guang Bao blasting parameter design, as shown in Figure 5；
The borehole wall expands after the completion of brush, carries out explosion to the periphery hole in the area Liang Geguangbao above and below the borehole wall, entire borehole wall periphery hole is total
Explosion is carried out in three times, and two rows periphery hole detonates simultaneously.
1. steel for shot
Pit shaft up-and-down boundary respectively arranges two rows of light blast holes, and pitch of holes is 150mm, is bored along light blast hole using inclination on the borehole wall
Hole, blasthole inclination angle are 19 °, and blasthole length is 720mm, and borehole wall lower edge light blast hole uses horizontal drilling, drillable length 680m.
2. blast hole projectile filling uses 3# water gel explosives for mine, explosive parameter are as follows: 330g/ volumes of quality, powder stick diameter is
27mm；Blasthole length is 680mm and two kinds of 720mm, takes spaced loading method.
Single hole explosive payload is calculated as follows:
Q=abhq
In formula: a-blasthole spacing, m；
B-blasthole array pitch, m；
H-concrete thickness, m；
Q-unit concrete explosion explosive consumption, g/m3。
Single hole explosive payload: Q1=abhq=0.15 × 0.22 × 0.80 × 4600=121g, takes 120g.
3. charge constitution
Using stemming spaced loading structure, 3 packs of each blast hole charging, single pack quality 40g, cartridge length
50mm, stemming gap length 90mm.
4. pack makes
Slotting area explosive payload is 120g, standard powder stick is cut into 8 parts, each pack quality is 40g, by well cutting
Powder stick be put into the kraft paper bag made.
Step 5 design of firing circuit
Using electric detonator initiation network, including detonator, conducting wire, detonating power supply and blasthole.
In step 1, the caved area blasthole spacing is 200mm, and the area Guang Bao blasthole spacing is 150mm.
Slotting sector width is 1.0m, is highly 1.2m, and vertically and horizontally the upper blasthole number of rows detonated is six
Row.It detonates every time in the area Kuo Shua horizontal direction six artillery salvo holes, slotting area each side three row, detonate on vertical direction six artillery salvos
Hole, expanding brush direction is gradually to be extended from slotting area to two sides.Explosion is carried out to the area Guang Bao after to caved area whole explosion, on
The area lower Liang Geguangbao is divided into three separate explosions, and every separate explosion perimeter is 5m, and blasting hole number of rows is two rows, and the blasthole of drainpipe side is most
After detonate.
In step 5, all detonators all use parallel connection, and the detonating power supply uses 380V AC power source.
It is additionally provided with active defense measure and equipment, facility specific shield measure.
The composite protective device that the active defense measure is formed using rhombus net and the double-deck waste and old belt, it is quick-fried for covering
Broken blasthole.Composite protective device height, which is greater than, removes borehole wall height at least 1.0m, and is fixed on the pre-demolition borehole wall with expansion bolt
Upper and lower, while flanging channel steel is set.
The equipment, facility specific shield measure include Grouting Pipe, drainpipe protection, the protection of shaft bottom lateral duct, the borehole wall
Cable protective, outer shaft wall safeguard measure, hanging scaffold and signal, illumination protect and the protection of truss girder.
The foregoing is only a preferred embodiment of the present invention, the scope of protection of the present invention is not limited to this, it is any ripe
Know those skilled in the art within the technical scope of the present disclosure, the letter for the technical solution that can be become apparent to
Altered or equivalence replacement are fallen within the protection scope of the present invention.
Claims (6)
1. a kind of method of mine shaft recovery project borehole wall fluting explosion, which comprises the following steps:
Step 1, burst region and firing order divide
Broken wall slot area is divided into boundary blast area and caved area along pit shaft vertical direction, two artillery salvos are arranged in boundary blast area
Hole, respectively in the up-and-down boundary of pit shaft fluting；Caved area arranges six artillery salvo holes in the vertical direction；It will be collapsed along pit shaft horizontal direction
It settles in an area and is divided into two major parts, respectively slotting area and the area Kuo Shua；
Step 2 slotting area blasting parameter design
1. steel for shot form
Using vertical slotting, pit shaft vertical direction and horizontal direction respectively arrange six artillery salvo holes, and steel for shot form is using three flower holes
It arranges, blasthole spacing is 200mm in horizontal direction, and 3rd area of top uses inclined drill, and blasthole inclination angle is 19 °, and blasthole length is
720mm；2nd area of top uses inclined drill, and blasthole inclination angle is 7 °, and blasthole length is 680mm；Other blastholes all use vertical well
Wall drilling, blasthole length is 680mm；
2. single hole explosive payload
Blast hole projectile filling uses 3# water gel explosives for mine, explosive parameter are as follows: 250g/ volumes of quality, length 300mm, powder stick is straight
Diameter is 35mm；Blasthole length is 680mm and two kinds of 720mm, takes spaced loading method；
Single hole explosive payload is calculated as follows:
Q=abhq
In formula: a-blasthole spacing, m；
B-blasthole array pitch, m；
H-concrete thickness, m；
Q-unit concrete explosion explosive consumption, g/m3；
Single hole explosive payload: Q1=abhq=0.2 × 0.22 × 0.80 × 5100=180g；
3. charge constitution
In order to make explosive arrangement uniformly, prevent explosive from its closer barrel of adjusting the distance being concentrated to damage using stemming spaced loading
Structure, 3 packs of each blast hole charging, single pack quality 60g, cartridge length 75mm, stemming gap length 90mm；
4. pack makes
Slotting area explosive payload is 180g, the cutting of standard powder stick is segmented into four parts, each pack quality is 60g, by well cutting
Powder stick be put into the kraft paper bag made；
The area step 3 Kuo Shua blasting parameter design
After the completion of the vertical slotting of the borehole wall, explosion is carried out to two sides from slot area and expands brush, until all boreholes wall all expand brush and complete；
3. steel for shot
Pit shaft vertical direction arranges six artillery salvo holes, each every time at left and right sides of slotting area in pit shaft horizontal direction to arrange three artillery salvo holes,
Horizontal direction steel for shot form arranges that blasthole spacing is 200mm, top first row blasthole in horizontal direction using three flower holes
Using inclined drill, blasthole inclination angle is 19 °, and blasthole length is 720mm；Second row blasthole uses inclined drill, and blasthole inclination angle is
7 °, blasthole length is 680mm；Remaining four artillery salvo hole is all drilled using the vertical borehole wall, and blasthole length is 680mm；
2. single hole explosive payload
Blast hole projectile filling uses 3# water gel explosives for mine, explosive parameter are as follows: 250g/ volumes of quality, length 300mm, powder stick is straight
Diameter is 35mm；Blasthole length is 680mm and two kinds of 720mm, takes spaced loading method；
Single hole explosive payload is calculated as follows:
Q=abhq
In formula: a-blasthole spacing, m；
B-blasthole array pitch, m；
H-concrete thickness, m；
Q-unit concrete explosion explosive consumption, g/m3；
Single hole explosive payload: Q1=abhq=0.2 × 0.22 × 0.80 × 5100=180g；
3. charge constitution
In order to make explosive arrangement uniformly, prevent explosive from its closer barrel of adjusting the distance being concentrated to damage using stemming spaced loading
Structure, 3 packs of each blast hole charging, single pack quality 60g, cartridge length 75mm, stemming gap length 90mm, wherein on
Portion first row blasthole aperture stemming length is adjusted to 390mm；
4. pack makes
Slotting area explosive payload is 180g, the cutting of standard powder stick is segmented into four parts, each pack quality is 60g, by well cutting
Powder stick be put into the kraft paper bag made；
The area step 4 Guang Bao blasting parameter design
The borehole wall expands after the completion of brush, carries out explosion to the periphery hole in the area Liang Geguangbao above and below the borehole wall, entire borehole wall periphery hole is divided into three
Secondary carry out explosion, two rows periphery hole detonate simultaneously；
1. steel for shot
Pit shaft up-and-down boundary respectively arranges two rows of light blast holes, and pitch of holes is 150mm, uses inclined drill along light blast hole on the borehole wall,
Blasthole inclination angle is 19 °, and blasthole length is 720mm, and borehole wall lower edge light blast hole uses horizontal drilling, drillable length 680m；
2. blast hole projectile filling uses 3# water gel explosives for mine, explosive parameter are as follows: 330g/ volumes of quality, powder stick diameter is 27mm；Big gun
Hole length is 680mm and two kinds of 720mm, takes spaced loading method；
Single hole explosive payload is calculated as follows:
Q=abhq
In formula: a-blasthole spacing, m；
B-blasthole array pitch, m；
H-concrete thickness, m；
Q-unit concrete explosion explosive consumption, g/m3；
Single hole explosive payload: Q1=abhq=0.15 × 0.22 × 0.80 × 4600=121g, takes 120g；
3. charge constitution
Using stemming spaced loading structure, 3 packs of each blast hole charging, single pack quality 40g, cartridge length 50mm, big gun
Mud gap length 90mm；
4. pack makes
Slotting area explosive payload is 120g, the cutting of standard powder stick is segmented into 8 parts, each pack quality is 40g, by well cutting
Powder stick is put into the kraft paper bag made；
Step 5 design of firing circuit
Using electric detonator initiation network, including detonator, conducting wire, detonating power supply and blasthole.
2. the method for mine shaft recovery project borehole wall fluting explosion according to claim 1, which is characterized in that step 1
In, the caved area blasthole spacing is 200mm, and the area Guang Bao blasthole spacing is 150mm；
Slotting sector width is 1.0m, is highly 1.2m, and vertically and horizontally the upper blasthole number of rows detonated is six rows；Expand
It detonates every time six artillery salvo holes in brush area's horizontal direction, slotting area each side three row, six artillery salvo holes of detonating on vertical direction are expanded
Brushing direction is gradually to be extended from slotting area to two sides；After to caved area whole explosion to the area Guang Bao carry out explosion, upper and lower two
The area Ge Guangbao is divided into three separate explosions, and every separate explosion perimeter is 5m, and blasting hole number of rows is two rows, and the blasthole of drainpipe side finally rises
It is quick-fried.
3. the method for mine shaft recovery project borehole wall fluting explosion according to claim 1, which is characterized in that step 5
In, all detonators all use parallel connection, and the detonating power supply uses 380V AC power source.
4. the method for mine shaft recovery project borehole wall fluting explosion according to claim 1, which is characterized in that be additionally provided with
Active defense measure and equipment, facility specific shield measure.
5. the method for mine shaft recovery project borehole wall fluting explosion according to claim 4, which is characterized in that the master
The composite protective device that dynamic safeguard procedures are formed using rhombus net and the double-deck waste and old belt, for covering blasting hole；It is compound anti-
Protection unit height, which is greater than, removes borehole wall height at least 1.0m, and the upper and lower of the pre-demolition borehole wall is fixed on expansion bolt, simultaneously
Flanging channel steel is set.
6. the method for mine shaft recovery project borehole wall fluting explosion according to claim 4, which is characterized in that described to set
Standby, facility specific shield measure includes Grouting Pipe, drainpipe protection, the protection of shaft bottom lateral duct, borehole wall cable protective, outer layer well
Wall safeguard measure, hanging scaffold and signal, illumination protect and the protection of truss girder.
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN114812323A (en) * | 2022-06-10 | 2022-07-29 | 河南理工大学 | Step blasting method with high energy utilization rate |
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| CN114812323A (en) * | 2022-06-10 | 2022-07-29 | 河南理工大学 | Step blasting method with high energy utilization rate |
| CN114812323B (en) * | 2022-06-10 | 2023-05-23 | 河南理工大学 | Step blasting method with high energy utilization rate |
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Application publication date: 20190319 |