CN110043302B - Safe and efficient construction method for long-distance single-head tunneling surface ventilation patio - Google Patents
Safe and efficient construction method for long-distance single-head tunneling surface ventilation patio Download PDFInfo
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- CN110043302B CN110043302B CN201910451190.1A CN201910451190A CN110043302B CN 110043302 B CN110043302 B CN 110043302B CN 201910451190 A CN201910451190 A CN 201910451190A CN 110043302 B CN110043302 B CN 110043302B
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- 238000009423 ventilation Methods 0.000 title claims abstract description 94
- 238000010276 construction Methods 0.000 title claims abstract description 68
- 230000005641 tunneling Effects 0.000 title claims abstract description 20
- 238000005553 drilling Methods 0.000 claims abstract description 95
- 239000010432 diamond Substances 0.000 claims abstract description 38
- 229910003460 diamond Inorganic materials 0.000 claims abstract description 38
- 230000002457 bidirectional effect Effects 0.000 claims abstract description 28
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 claims abstract description 19
- 238000000034 method Methods 0.000 claims abstract description 17
- UGFAIRIUMAVXCW-UHFFFAOYSA-N Carbon monoxide Chemical compound [O+]#[C-] UGFAIRIUMAVXCW-UHFFFAOYSA-N 0.000 claims abstract description 13
- 229910002091 carbon monoxide Inorganic materials 0.000 claims abstract description 13
- 239000004744 fabric Substances 0.000 claims abstract description 11
- 239000000428 dust Substances 0.000 claims abstract description 9
- 238000000227 grinding Methods 0.000 claims abstract description 9
- MGWGWNFMUOTEHG-UHFFFAOYSA-N 4-(3,5-dimethylphenyl)-1,3-thiazol-2-amine Chemical compound CC1=CC(C)=CC(C=2N=C(N)SC=2)=C1 MGWGWNFMUOTEHG-UHFFFAOYSA-N 0.000 claims abstract description 7
- 238000005516 engineering process Methods 0.000 claims abstract description 7
- JCXJVPUVTGWSNB-UHFFFAOYSA-N nitrogen dioxide Inorganic materials O=[N]=O JCXJVPUVTGWSNB-UHFFFAOYSA-N 0.000 claims abstract description 7
- 238000004080 punching Methods 0.000 claims description 18
- 238000005422 blasting Methods 0.000 claims description 13
- 238000009412 basement excavation Methods 0.000 claims description 11
- 239000011435 rock Substances 0.000 claims description 11
- 229910000831 Steel Inorganic materials 0.000 claims description 9
- 239000010959 steel Substances 0.000 claims description 9
- 239000007789 gas Substances 0.000 claims description 8
- 238000007600 charging Methods 0.000 claims description 5
- 238000005065 mining Methods 0.000 claims description 5
- 239000002893 slag Substances 0.000 claims description 4
- 238000004873 anchoring Methods 0.000 claims description 3
- 238000001514 detection method Methods 0.000 claims description 3
- 239000003814 drug Substances 0.000 claims description 3
- 238000007689 inspection Methods 0.000 claims description 3
- 239000011159 matrix material Substances 0.000 claims description 3
- 238000005259 measurement Methods 0.000 claims description 3
- 235000012149 noodles Nutrition 0.000 claims description 3
- 238000005498 polishing Methods 0.000 claims description 3
- 230000001681 protective effect Effects 0.000 claims description 3
- 239000008262 pumice Substances 0.000 claims description 3
- 239000010453 quartz Substances 0.000 claims description 3
- VYPSYNLAJGMNEJ-UHFFFAOYSA-N silicon dioxide Inorganic materials O=[Si]=O VYPSYNLAJGMNEJ-UHFFFAOYSA-N 0.000 claims description 3
- 230000000087 stabilizing effect Effects 0.000 claims description 3
- 238000010079 rubber tapping Methods 0.000 claims description 2
- 238000007599 discharging Methods 0.000 claims 1
- 230000035515 penetration Effects 0.000 abstract description 4
- 206010003497 Asphyxia Diseases 0.000 description 7
- 231100000572 poisoning Toxicity 0.000 description 7
- 230000000607 poisoning effect Effects 0.000 description 7
- 238000009434 installation Methods 0.000 description 2
- 229910052751 metal Inorganic materials 0.000 description 2
- 239000002184 metal Substances 0.000 description 2
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- 238000003825 pressing Methods 0.000 description 2
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- E—FIXED CONSTRUCTIONS
- E21—EARTH OR ROCK DRILLING; MINING
- E21B—EARTH OR ROCK DRILLING; OBTAINING OIL, GAS, WATER, SOLUBLE OR MELTABLE MATERIALS OR A SLURRY OF MINERALS FROM WELLS
- E21B10/00—Drill bits
- E21B10/42—Rotary drag type drill bits with teeth, blades or like cutting elements, e.g. fork-type bits, fish tail bits
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- E—FIXED CONSTRUCTIONS
- E21—EARTH OR ROCK DRILLING; MINING
- E21B—EARTH OR ROCK DRILLING; OBTAINING OIL, GAS, WATER, SOLUBLE OR MELTABLE MATERIALS OR A SLURRY OF MINERALS FROM WELLS
- E21B10/00—Drill bits
- E21B10/46—Drill bits characterised by wear resisting parts, e.g. diamond inserts
- E21B10/54—Drill bits characterised by wear resisting parts, e.g. diamond inserts the bit being of the rotary drag type, e.g. fork-type bits
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- E—FIXED CONSTRUCTIONS
- E21—EARTH OR ROCK DRILLING; MINING
- E21B—EARTH OR ROCK DRILLING; OBTAINING OIL, GAS, WATER, SOLUBLE OR MELTABLE MATERIALS OR A SLURRY OF MINERALS FROM WELLS
- E21B25/00—Apparatus for obtaining or removing undisturbed cores, e.g. core barrels or core extractors
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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
- E21F1/00—Ventilation of mines or tunnels; Distribution of ventilating currents
- E21F1/006—Ventilation at the working face of galleries or tunnels
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- Engineering & Computer Science (AREA)
- Mining & Mineral Resources (AREA)
- Life Sciences & Earth Sciences (AREA)
- Geology (AREA)
- General Life Sciences & Earth Sciences (AREA)
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Abstract
A safe and efficient construction method for a long-distance single-headed tunneling surface ventilation patio is characterized in that before the ventilation patio is constructed, a vent hole is drilled between an upper middle-section gallery and a lower middle-section gallery, the ventilation patio is constructed by taking the vent hole as a center, so that smooth penetration of the ventilation patio is ensured, carbon monoxide can be rapidly discharged through the vent hole, and the construction efficiency and the construction safety of the ventilation patio are ensured; the drilling machine adopts a portable full-hydraulic core drilling machine, adopts a rope coring drilling technology, adopts a bidirectional drilling tooth diamond drill bit and adopts a drill bit online hole bottom grinding process so as to improve the drilling efficiency of the vent hole; the ventilation patio adopts a method of building a construction operation platform, so that the problem that a tank lifting rope is blocked possibly when the tank lifting is adopted for ventilation patio construction is prevented; the wind-water linkage air supply device and the cloth cylinder type air supply device are adopted on the construction working face of the ventilation patio, so that the concentration of carbon monoxide, nitrogen dioxide and dust on the working face can be rapidly reduced, and the construction efficiency of the ventilation patio is improved.
Description
Technical Field
The invention relates to the technical field of construction of a long-distance single-head tunneling face ventilation system for mining nonferrous metal ores, in particular to a safe and efficient construction method of a long-distance single-head tunneling face ventilation patio.
Background
In the safety accidents of mining of nonferrous metal ores, the occurrence frequency of the poisoning asphyxia accidents is high, and the harmfulness of the poisoning asphyxia accidents is great, so that high attention must be paid to the poisoning asphyxia accidents, and effective precautionary measures are taken; the investigation and analysis of accidents show that the mine which has poisoning asphyxia accidents to cause casualties, especially the place with imperfect ventilation system of long-distance single-head driving face, is most likely to have poisoning asphyxia accidents; therefore, in the actual production process, a ventilation raise is constructed on the long-distance single-head tunneling surface to improve the ventilation condition of the working surface; however, the ventilation raise shaft is constructed on a long-distance single-head tunneling surface, the poisoning suffocation potential safety hazard exists, the density of carbon monoxide gas generated by blasting is smaller than that of air, the tunneling operation surface of the ventilation raise shaft often becomes a carbon monoxide gathering place, a cloth-tube type air supply device is often adopted to be connected to the operation surface of the ventilation raise shaft for ventilation in the existing construction, the carbon monoxide gas is difficult to be discharged out of the operation surface of the ventilation raise shaft due to the lack of an air supply circulation loop, and the poisoning suffocation potential safety hazard is gradually increased along with the increase of the construction height of the ventilation raise shaft; in addition, in the construction process of the actual ventilation patio, the penetration of the ventilation patio is difficult due to improper control of the tunneling direction, so that the risk coefficient of the ventilation patio construction is further increased, and the waste of ineffective engineering is also caused; therefore, a reasonable construction method is needed to ensure safe and efficient construction of the long-distance single-head tunneling surface ventilation raise shaft.
Disclosure of Invention
In order to overcome the defects in the background technology, the invention discloses a safe and efficient construction method of a long-distance single-headed excavation face ventilation patio, wherein before the construction of the long-distance single-headed excavation face ventilation patio, a vent hole is drilled between an upper middle section gallery and a lower middle section gallery, the construction of the ventilation patio is carried out by taking the vent hole as the center, and the smooth penetration of the ventilation patio is ensured; meanwhile, carbon monoxide generated during construction of the ventilation raise can be quickly discharged through the ventilation holes, so that the ventilation efficiency and the construction safety of the construction working face of the ventilation raise are ensured; the drilling machine adopts a portable full-hydraulic core drilling machine, and has the advantages of simple and safe operation, high efficiency, convenient installation and removal and small preparation workload before drilling; by adopting the rope coring drilling technology, the rock core can be adopted without lifting the drill, so that the drilling efficiency is improved, and the occurrence of hole collapse accidents is reduced; the diamond drill bit with the bidirectional drill teeth is adopted, so that the problem of drill bit clamping accidents of a steep ridge when the drill bit is lifted is solved; the online hole bottom grinding process of the drill bit is adopted, so that the work of replacing the drill bit in the drilling process is omitted, the drilling efficiency is improved, and the consumption of the drill bit is also reduced; the method for constructing the construction operation platform of the ventilation patio is adopted, so that the problem that a sling rope is blocked possibly due to hole collapse when the sling is used for constructing the ventilation patio is solved; the wind-water linkage air supply device and the cloth cylinder type air supply device are adopted on the construction working face of the ventilation patio, so that the concentration of carbon monoxide, nitrogen dioxide and dust on the working face can be rapidly reduced, and the construction efficiency of the ventilation patio is improved.
In order to realize the purpose, the invention adopts the following technical scheme: a safe and efficient construction method for a long-distance single-headed tunneling surface ventilation patio is characterized in that before the ventilation patio is constructed, construction vent holes of the ventilation patio are drilled between a lower middle-section gallery and an upper middle-section gallery; determining the positions of the through holes of the upper middle section tunnel and the lower middle section tunnel of the vent hole according to the design position of the ventilation raise of the lower middle section tunnel and the position of the upper middle section tunnel; then designing the drilling position, the inclination angle and the azimuth angle of the drilling machine according to the through hole positions of the ventilation holes in the lower middle section gallery and the upper middle section gallery; the drilling machine adopts a portable full-hydraulic core drilling machine, the drill bit adopts a bidirectional drilling tooth diamond drill bit, and the rope coring technology is combined, and the core is taken out from the inner hole of the drill rod through a fisher, so that the drilling lifting times in the drilling process are reduced, and the drilling efficiency is greatly improved; the front end of the bidirectional diamond bit is provided with a tunneling drill tooth, and the tail end of the bidirectional diamond bit is provided with a reverse drill tooth.
Preferably, in the drilling process of the full-hydraulic core drilling machine, the two-way drill tooth diamond drill bit performs rope coring operation and drilling depth, inclination angle and azimuth angle detection operation once every 1 m; and when the inclination angle and the azimuth angle of the vent hole exceed the designed values, carrying out deviation rectifying operation on the vent hole.
Preferably, when the bidirectional drill tooth diamond drill bit drills into a hard rock layer and the bidirectional drill tooth diamond drill bit has the polishing problem, the drilling operation is stopped, and the hole bottom grinding operation of the bidirectional drill tooth diamond drill bit is carried out on line; lifting out the fisher from the inner hole of the drill rod, and throwing quartz gravel with the granularity of 1.0-2.0 cm and the weight of 0.5-1.0 kg into the bottom of the vent hole through the inner hole of the drill rod; applying pressure to the drill rod by 0.5 MPa, continuously grinding the matrix of the bidirectional drilling tooth tunneling diamond drill bit at the rotating speed of 30 revolutions per minute for 3.0-5.0 minutes, and then performing normal drilling operation; the hole bottom grinding process of the online bidirectional drilling tooth diamond drill bit saves the work of replacing the drill bit in the drilling process, improves the drilling efficiency and saves the consumption of the drill bit.
Preferably, when the drilling operation depth is close to the top of the lower middle section gallery, the safety warning work of the lower middle section gallery is well done, mining operation personnel are evacuated, and safety accidents caused by the fact that the vent hole penetrates through the hole are prevented.
Preferably, after the vent hole penetrates through the opening, the drill rod rotates to lift the bidirectional diamond bit; in the prior art, if a structural alteration zone is broken in the drilling process, cracks of the internal structure develop, and a crystal hole structure develops locally, so that a drill bit falls off in the drilling process, even the local aperture becomes thick, a steep bank is formed, a drill rod and the drill bit can be clamped below the steep bank, the drill bit is difficult to lift out at the steep bank, and the drill jamming accident of the steep bank occurs, so that the drilling is scrapped; the drill rod rotates to lift the two-way drill tooth diamond drill bit, so that when a steep ridge drill clamping accident occurs, the reverse drill tooth of the two-way drill tooth diamond drill bit is used for cutting a steep ridge, the two-way drill tooth diamond drill bit is guaranteed to be lifted and pulled out smoothly, and drilling scrapping is avoided; after the drilling operation is finished, the orifices of the upper middle section gallery are cleaned and blocked, and sundries and gravels are prevented from falling into the vent holes.
Preferably, after the drilling operation is finished, a ventilation raise construction operation platform is built below the orifice of the lower middle section gallery; the operation platform is hung by adopting an anchor rod, the anchor rod is required to be arranged at a position for stabilizing rocks, and the anchoring depth is more than 1000 mm; the anchor rod is made of phi 32 round steel, and the operation platform is built by adopting equilateral angle steel L50 multiplied by 3 and phi 06 round steel; the working platform is divided into two layers, the first layer of working platform is 4 meters away from the working surface, and the second layer of working platform is 2 meters above the first layer of working platform; carrying out drilling operation on the second-layer operation platform by ventilation raise construction operators; protective nets are arranged on the peripheries of the two layers of working platforms and used as high-altitude anti-falling measures; a cloth cylinder type air supply device and an air-water linkage air supply device are arranged on the peripheral rock wall of the operation platform; the wind-water linkage air supply device is a water-gas discharge device arranged on a connecting pipeline after connecting a water path for punching and a pipeline for a high-pressure gas path; the wind-water linkage air supply device and the cloth cylinder type air supply device can rapidly reduce the concentration of carbon monoxide, nitrogen dioxide and dust after blasting on the construction operation surface of the ventilation patio, and improve the construction efficiency of the ventilation patio.
Preferably, before the punching operation, the ventilation raise construction operator must firstly perform the operations of carbon monoxide, nitrogen dioxide, dust concentration measurement and 'strike and ask', and can perform the punching operation after the operation environment is determined to be safe; when a ventilation raise construction operator performs punching operation, the cloth cylinder type air supply device is in a working state, and the wind and water linkage air supply device is in a closed state; the middle section gallery orifice below the perforation hole is taken as the center, so that the smooth penetration of the construction of the ventilation raise can be ensured; the distance between the holes is less than 500 mm, the depth of the holes is 2 m, and the medicine loading is less than 0.4 kg per m; after the punching and charging are finished, the operation platform is dismantled, the air and water linkage air supply device is opened, the working face operation personnel are evacuated to a safe area, and then blasting operation is carried out.
Preferably, after the blasting operation is finished, the ventilation and dust removal time lasts 45 minutes, then the blasting worker and the safety worker enter the operation surface to perform pumice and air quality inspection, and after the safety of the working noodle pieces is confirmed, the working worker enters the operation surface to perform slag tapping operation.
Preferably, after the operation of slagging tap is ended, the operation of building, punching, charging, blasting and slagging tap of the operation platform is repeatedly carried out until the ventilation raise is communicated with the upper middle section gallery.
Due to the adoption of the technical scheme, the invention has the following beneficial effects: the invention discloses a safe and efficient construction method of a long-distance single-headed excavation face ventilation patio, which comprises the steps of firstly drilling a ventilation hole between an upper middle-section gallery and a lower middle-section gallery before the construction of the long-distance single-headed excavation face ventilation patio, and carrying out the construction of the ventilation patio by taking the ventilation hole as the center to ensure that the ventilation patio smoothly penetrates through the opening; meanwhile, carbon monoxide generated during construction of the ventilation raise can be quickly discharged through the ventilation holes, so that the ventilation efficiency and the construction safety of the construction working face of the ventilation raise are ensured; the drilling machine adopts a portable full-hydraulic core drilling machine, and has the advantages of simple and safe operation, high efficiency, convenient installation and removal and small preparation workload before drilling; by adopting the rope coring drilling technology, the rock core can be adopted without lifting the drill, so that the drilling efficiency is improved, and the occurrence of hole collapse accidents is reduced; the diamond drill bit with the bidirectional drill teeth is adopted, so that the problem of drill bit clamping accidents of a steep ridge when the drill bit is lifted is solved; the online hole bottom grinding process of the drill bit is adopted, so that the work of replacing the drill bit in the drilling process is omitted, the drilling efficiency is improved, and the consumption of the drill bit is also reduced; the method for constructing the construction operation platform of the ventilation patio is adopted, so that the problem that a sling rope is blocked possibly due to hole collapse when the sling is used for constructing the ventilation patio is solved; the wind-water linkage air supply device and the cloth cylinder type air supply device are adopted on the construction working face of the ventilation patio, so that the concentration of carbon monoxide, nitrogen dioxide and dust on the working face can be rapidly reduced, and the construction efficiency of the ventilation patio is improved.
Drawings
FIG. 1 is a schematic view of a bi-directional tooth diamond drill bit;
FIG. 2 is a schematic view of a bi-directional diamond drill bit and drill rod;
FIG. 3 is a schematic view of a vent hole drilling operation;
fig. 4 is a schematic view of a scarp drill;
fig. 5 is a schematic view of ventilation patio construction.
In the figure: 1. a bi-directional diamond bit; 101. tunneling and drilling teeth; 102. reversely drilling teeth; 2. a drill stem; 3. a full hydraulic core drilling machine; 4. an upper middle tunnel; 5. a lower middle tunnel; 6. a vent hole; 7. a steep bank; 8. an operation platform; 9. ventilating raise shafts; 10. a waterway; 11. a high-pressure gas circuit; 12. the wind and water linkage air supply device; 13. cloth tube type air supply device.
Detailed Description
The present invention will be explained in detail by the following examples, which are disclosed for the purpose of protecting all technical improvements within the scope of the present invention.
A safe and efficient construction method for a long-distance single-head tunneling surface ventilation raise shaft comprises the following steps: before the construction of the ventilation raise 9, firstly, a construction vent 6 of the ventilation raise 9 is drilled between the lower middle tunnel 5 and the upper middle tunnel 4; determining the positions of the through holes of the upper middle section tunnel 4 and the lower middle section tunnel 5 of the vent hole 6 according to the design position of the ventilation raise 9 for constructing the lower middle section tunnel 5 and the position of the upper middle section tunnel 4; then designing the drilling position, the inclination angle and the azimuth angle of the drilling machine according to the through hole positions of the ventilation holes 6 in the lower middle section tunnel 5 and the upper middle section tunnel 4; the drilling machine selects a portable full-hydraulic core drilling machine 3, the drill bit adopts a bidirectional drilling tooth diamond drill bit 1, and a rope coring technology is combined, so that a core is taken out from an inner hole of a drill rod 2 through a fisher, and drilling construction is carried out; the front end of the bidirectional drilling tooth diamond drill bit 1 is provided with a tunneling drilling tooth 101, and the tail end of the bidirectional drilling tooth diamond drill bit is provided with a reverse drilling tooth 102;
in the drilling process of the full-hydraulic core drilling machine 3, the bidirectional drilling tooth diamond drill bit 1 performs rope coring operation and drilling depth, inclination angle and azimuth angle detection operation once every 1 meter; when the inclination angle and the azimuth angle of the vent hole 6 exceed the design values, carrying out deviation rectifying operation on the vent hole 6;
when the bidirectional drill tooth diamond bit 1 drills into a hard rock layer and the bidirectional drill tooth diamond bit 1 has a polishing problem, so that the phenomenon of skidding occurs in drilling, stopping drilling operation and performing hole bottom grinding operation of the bidirectional drill tooth diamond bit 1 on line; lifting the fisher out of the inner hole of the drill rod 2, and throwing quartz gravel with the granularity of 1.0-2.0 cm and the weight of 0.5-1.0 kg into the bottom of the vent hole 6 through the inner hole of the drill rod 2; applying pressure to the drill rod 2 by 0.5 MPa, continuously grinding the matrix of the two-way drilling tooth diamond bit 1 tunneling drilling tooth 101 at the rotating speed of 30 revolutions per minute for 3.0-5.0 minutes, and then performing normal drilling operation;
when the drilling operation depth is close to the top of the lower middle section tunnel 5, the safety warning work of the lower middle section tunnel 5 is well done, mining operation personnel are evacuated, and safety accidents caused when the vent hole 6 penetrates through the hole are prevented;
after the vent hole 6 is opened, the drill rod 2 rotates to lift the bidirectional drilling tooth diamond drill bit 1; after the drilling operation is finished, cleaning and blocking operations are carried out on the hole opening of the upper middle section tunnel 4, so that sundries and broken stones are prevented from falling into the vent hole 6;
after the drilling operation is finished, a construction operation platform 8 of a ventilation raise 9 is built below the orifice of the lower middle section tunnel 5; the operation platform 8 is hung by adopting an anchor rod, the anchor rod is required to be arranged at a position for stabilizing rocks, and the anchoring depth is more than 1000 mm; the anchor rod is made of phi 32 round steel, and the operation platform 8 is built by adopting equilateral angle steel L50 multiplied by 3 and phi 06 round steel; the working platform 8 is divided into two layers, the first layer of working platform 8 is 4 meters away from the working surface, and the second layer of working platform 8 is 2 meters above the first layer of working platform 8; the construction operator of the ventilation raise 9 carries out the drilling operation on the second layer of operation platform 8; protective nets are arranged on the periphery of the two-layer working platform 8 and used as high-altitude anti-falling measures; a cloth cylinder type air supply device 13 and an air-water linkage air supply device 12 are arranged on the rock wall around the operation platform 8; the air-water linkage air supply device 12 is a water-gas discharge device arranged on a connecting pipeline after the water channel 10 for punching and the high-pressure air channel 11 are connected by the pipeline;
before the punching operation, the construction operator of the ventilation raise 9 must firstly carry out the operations of carbon monoxide, nitrogen dioxide, dust concentration measurement and 'strike-on asking', and can carry out the punching operation after the operation environment is determined to be safe; when a construction operator of the ventilation raise 9 performs punching operation, the cloth cylinder type air supply device 13 is in a working state, and the air and water linkage air supply device 12 is in a closed state; the middle section gallery 5 orifice below the perforation hole is taken as the center, the distance between the perforation holes is set to be less than 500 mm, the hole depth is 2 m, and the medicine loading is less than 0.4 kg per meter; after the punching and charging are finished, the operation platform 8 is dismantled, the air-water linkage air supply device 12 is opened, the working face operation personnel are evacuated to a safe area, and then blasting operation is carried out;
after blasting operation is finished, ventilating and dedusting time lasts for 45 minutes, then blasting workers and security workers enter an operation surface to perform pumice and air quality inspection, and after the safety of working noodle pieces is confirmed, the operating workers enter the operation surface to perform deslagging operation;
after the operation of slagging tap is ended, the operation of building, punching, powder charging, blasting and slagging tap of the operation platform 8 is repeatedly carried out until the ventilation raise shaft 9 communicates the lower middle section gallery 5 with the upper middle section gallery 4.
The present invention is not described in detail in the prior art.
Claims (8)
1. A safe and efficient construction method for a long-distance single-head tunneling surface ventilation raise is characterized by comprising the following steps: before the construction of the ventilation patio (9), firstly, a construction vent hole (6) of the ventilation patio (9) is drilled between the lower middle-section gallery (5) and the upper middle-section gallery (4); determining the positions of the through holes of the upper middle section tunnel (4) and the lower middle section tunnel (5) of the vent hole (6) according to the design position of a ventilation patio (9) for constructing the lower middle section tunnel (5) and the position of the upper middle section tunnel (4); then designing the drilling position, the inclination angle and the azimuth angle of the drilling machine according to the through positions of the vent holes (6) in the lower middle section gallery (5) and the upper middle section gallery (4); the drilling machine selects a portable full-hydraulic core drilling machine (3), the drill bit adopts a bidirectional drill tooth diamond drill bit (1), and the core is taken out from the inner hole of the drill rod (2) through a fisher by combining a rope coring technology, so that the drilling construction is carried out; the front end of the bidirectional diamond bit (1) is provided with a tunneling drill tooth (101), and the tail end of the bidirectional diamond bit is provided with a reverse drill tooth (102);
when the bidirectional drilling tooth diamond drill bit (1) drills into a hard rock layer and the bidirectional drilling tooth diamond drill bit (1) has a polishing problem, so that the phenomenon of skidding occurs in drilling, stopping drilling operation and performing hole bottom grinding operation of the online bidirectional drilling tooth diamond drill bit (1); the fisher is lifted out of the inner hole of the drill rod (2), and quartz gravel with the granularity of 1.0-2.0 cm and the weight of 0.5-1.0 kg is thrown into the bottom of the vent hole (6) through the inner hole of the drill rod (2); the pressure of the drill rod (2) is 0.5 MPa, the bidirectional drilling tooth diamond drill bit (1) is continuously ground at the rotating speed of 30 revolutions per minute, the matrix of the tunneling drill tooth (101) is ground for 3.0-5.0 minutes, and then normal drilling operation is carried out.
2. The safe and efficient construction method of the long-distance single-headed excavation face ventilation raise of claim 1, which is characterized in that: in the drilling process of the full-hydraulic core drilling machine (3), the two-way drilling tooth diamond bit (1) performs one-time rope coring operation and detection operations of the drilling depth, the inclination angle and the azimuth angle every time the two-way drilling tooth diamond bit (1) drills 1 meter; and when the inclination angle and the azimuth angle of the vent hole (6) exceed the designed values, performing deviation rectifying operation on the vent hole (6).
3. The safe and efficient construction method of the long-distance single-headed excavation face ventilation raise of claim 1, which is characterized in that: when the drilling operation depth is close to the top of the lower middle section gallery (5), the safety warning work of the lower middle section gallery (5) is well done, mining operation personnel are evacuated, and safety accidents caused when the vent hole (6) penetrates through the hole are prevented.
4. The safe and efficient construction method of the long-distance single-headed excavation face ventilation raise of claim 1, which is characterized in that: after the vent hole (6) penetrates through the hole, the drill rod (2) rotates to lift the bidirectional drilling tooth diamond drill bit (1); after the drilling operation is finished, the hole openings of the upper middle section gallery (4) are cleaned and blocked, and sundries and gravels are prevented from falling into the vent holes (6).
5. The safe and efficient construction method of the long-distance single-headed excavation face ventilation raise of claim 1, which is characterized in that: after the drilling operation is finished, a construction operation platform (8) of a ventilation raise (9) is built below the orifice of the lower middle section gallery (5); the operation platform (8) is hung by adopting an anchor rod, the anchor rod is required to be arranged at a position for stabilizing rocks, and the anchoring depth is more than 1000 mm; the anchor rod is made of phi 32 round steel, and the operation platform (8) is built by adopting equal-edge angle steel L50 multiplied by 3 and phi 06 round steel; the working platform (8) is divided into two layers, the distance between the first layer of working platform (8) and the working surface is 4 meters, and the second layer of working platform (8) is 2 meters above the first layer of working platform (8); construction operators of the ventilation patio (9) carry out drilling operation on the second-layer operation platform (8); protective nets are arranged on the periphery of the two-layer operation platform (8) and used as high-altitude anti-falling measures; a cloth cylinder type air supply device (13) and an air-water linkage air supply device (12) are arranged on the rock wall around the operation platform (8); the air and water linkage air supply device (12) is a water and gas discharge device which is arranged on a connecting pipeline after the water channel (10) for punching and the high-pressure gas channel (11) are connected by the pipeline.
6. The safe and efficient construction method of the long-distance single-headed excavation face ventilation raise of claim 1, which is characterized in that: before the punching operation, the construction operator of the ventilation patio (9) must firstly carry out the operations of carbon monoxide, nitrogen dioxide and dust concentration measurement and 'knocking over and asking for top', and can carry out the punching operation after the operation environment is determined to be safe; when a construction operator of the ventilation raise (9) performs punching operation, the cloth cylinder type air supply device (13) is in a working state, and the wind-water linkage air supply device (12) is in a closed state; the hole opening of the middle section tunnel (5) below the punching hole is taken as the center, the hole interval is set to be less than 500 mm, the hole depth is 2 m, and the medicine loading is less than 0.4 kg per m; after the punching and charging are finished, the operation platform (8) is dismantled, the air-water linkage air supply device (12) is opened, the working face operation personnel are evacuated to a safe area, and then blasting operation is carried out.
7. The safe and efficient construction method of the long-distance single-headed excavation face ventilation raise of claim 1, which is characterized in that: after blasting operation is finished, the ventilation and dust removal time lasts for 45 minutes, then blasting workers and security workers enter the operation surface to perform pumice and air quality inspection, and after the safety of working noodle pieces is confirmed, the operation workers enter the operation surface to perform slag tapping operation.
8. The safe and efficient construction method of the long-distance single-headed excavation face ventilation raise of claim 1, which is characterized in that: and after the slag discharging operation is finished, the operation platform (8) is repeatedly built, punched, charged, exploded and slag discharged until the ventilation raise (9) is communicated with the lower middle section gallery (5) and the upper middle section gallery (4).
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| CA2509854C (en) * | 2005-06-13 | 2009-11-17 | Northern Centre For Advanced Technology Inc. | A rotating dry drilling bit |
| CN201162493Y (en) * | 2007-12-04 | 2008-12-10 | 西南石油大学 | Bidirectional drill-following reamer blade |
| CN201874465U (en) * | 2010-11-27 | 2011-06-22 | 单小宁 | Reamer bit for exploration |
| CN202520360U (en) * | 2012-02-14 | 2012-11-07 | 山东新阳能源有限公司 | Wind and water linkage type remote spraying device for explosion region |
| CN204920803U (en) * | 2015-08-05 | 2015-12-30 | 陈冬冬 | Two -way drilling drill bit |
| CN205117394U (en) * | 2015-11-12 | 2016-03-30 | 胡俻瑜 | Geomantic omen linkage blasting atomizer |
| CN206000559U (en) * | 2016-08-28 | 2017-03-08 | 赤峰山金红岭有色矿业有限责任公司 | Ventilation unit for upraise work progress |
| CN108361041B (en) * | 2018-02-09 | 2018-12-14 | 内蒙古金陶股份有限公司 | A kind of inclination upraise construction technology |
| CN108590662A (en) * | 2018-05-09 | 2018-09-28 | 中国建筑第八工程局有限公司 | The construction method of high gradient slope metro station tunnel air shaft |
| CN109341449B (en) * | 2018-10-22 | 2021-02-19 | 临沂会宝岭铁矿有限公司 | Sectional control blasting well completion method for one-time rock drilling of large-section high raise |
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