CN102494572A - Blasting method for undermining and tunnelling in mode of distributing hollow holes at periphery and solid hole in center - Google Patents
Blasting method for undermining and tunnelling in mode of distributing hollow holes at periphery and solid hole in center Download PDFInfo
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- CN102494572A CN102494572A CN2011104313815A CN201110431381A CN102494572A CN 102494572 A CN102494572 A CN 102494572A CN 2011104313815 A CN2011104313815 A CN 2011104313815A CN 201110431381 A CN201110431381 A CN 201110431381A CN 102494572 A CN102494572 A CN 102494572A
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Abstract
The invention relates to a blasting method for undermining and tunnelling in a mode of distributing hollow holes at the periphery and a solid hole in the center. The blasting method is characterized by comprising the following steps of: distributing a central hole at the position 1/2 to 1/3 away from the vertical distance h of a tunnelling roadway bottom plate, namely an undermining center, and arranging a group of hollow holes around the central hole, so that the group of hollow holes and the central hole form an undermining hole; arranging more than three layers of auxiliary holes from inside to outside around the undermining hole, wherein a peripheral hole is formed in the outermost layer and comprises an arch hole, a bottom hole, a ditch bottom hole and two assistance holes; filling explosives into the central hole; arranging an explosive roll at the bottom of each hollow hole, filling the explosives at intervals into the arch hole of the peripheral hole, and filling the explosives into the two assistance holes and the bottom hole; and connecting by using half-second detonators, and detonating stage by stage, namely detonating the central hole and a group of hollow holes sequentially, detonating a first layer of auxiliary holes adjacent to the undermining hole secondly and so on, and detonating the bottom hole, the two assistance holes and the arch hole sequentially. The blasting method has a smooth blasting effect, is high in drilling footage rate and has wide practicality.
Description
Technical field
The present invention relates to metallic ore tunnelling blasting technique field, the blasting method of the particularly a kind of real hole slotting of emptying aperture center all around driving.
Background technology
China's metal mine industry roadway construction mainly is at present that the mode of driling explosion is carried out.Though development machine comes into operation, because it costs an arm and a leg (one at 600-1000 more than ten thousand yuan), body is huge, multiple factors such as operation inconvenience, by the mine produce do not adopt.And in practice for many years, metal mine driving blasting technique has obtained significant progress aspect technology, equipment, the safe practice, but unstable the hanging down with single big gun explosion drilling depth rate of photoface exploision effect is ubiquitous problem.Especially the quick-fried rock mass of hard difficulty, the problems referred to above are even more serious.
For realizing speedy drivage, improve the single big gun drilling depth of the quick-fried rock mass of hard difficulty rate, driving slotting technology more and more comes into one's own; Generally adopt " 5 heart hole Cut Blasting technology ", " rhombus diging groove blasting technique " " seam formula Cut Blasting technology " and " wedge shot technology " at present, the emptying aperture of these slotting technology is few, and the powder charge hole is many; In hard rock mass borehole blasting, its explosion scope of freedom is few, and big gun hole asphyxia by external pressure on the chest and abdomen situation is more after the explosion; Be difficult to obtain desirable drilling depth, therefore, how utilize existing rock drilling equipment and production technology to improve metal mine explosion drilling depth; Accelerating driving speed, is problem demanding prompt solution in the tunnelling blast working.
Summary of the invention
The purpose of this invention is to provide the real hole slotting of the emptying aperture center all around driving blasting method that a kind of photoface exploision is effective, the drilling depth rate is high.
The objective of the invention is to realize through following technical proposals:
Real hole, emptying aperture center slotting driving blasting method around of the present invention; Pattern, the slotting emptying aperture that it is characterized in that comprising emptying aperture center reality hole slotting around adopting deepened powder charge, reduction slotting center, implemented the detonation mode of photoface exploision, and concrete steps are following:
1) carry out the operation of cloth hole,
1. confirm the position at slotting center, promptly the 1/2-1/3 place apart from the vertical range h of digging laneway base plate is the slotting center, and at this slotting center arrangement centre bore,
2. arrange one group of emptying aperture around this centre bore then, this group of emptying aperture forms keyhole with centre bore,
3. arrange via hole more than three layers from inside to outside around the circumferencial direction of said keyhole, outermost layer is a periphery hole, and this periphery hole comprises that hole, arch, bottom outlet, ditch bottom outlet and two help the hole,
2) carry out charging, said centre bore is filled explosive, and an explosive cartridge is all adorned in the bottom of said one group of emptying aperture, and described via hole is filled explosive, and the equal spaced loading in hole is helped in the hole, arch and two of said periphery hole,
3) operation of detonating with half second detonator line, is detonated piecemeal, and firing order is that centre bore detonates earlier, is one group of emptying aperture then, secondly is the ground floor via hole of contiguous keyhole, and the like; For outermost periphery hole, the bottom outlet that detonates earlier is two to help the hole then, and what detonate at last is hole, arch and ditch bottom outlet.
The hole depth of said centre bore is 1500-3000mm.
The quantity of described one group of emptying aperture is 3-8 emptying apertures.
The spacing of said one group of emptying aperture and centre bore is 70-80mm, and the emptying aperture of this keyhole is than the dark 200mm of hollow hole of centre.
The arch pitch of holes of said periphery hole is 400-600mm, and two to help pitch-row be 650-750mm, and the pitch-row of bottom outlet is 500-600mm.
Adorn 3-4 explosive cartridges in each hole in hole, said arch, said two help to adorn 5-6 explosive cartridges in each hole in hole, and said ditch bottom outlet is filled explosive.
The advantage of real hole, emptying aperture center slotting driving blasting method is around of the present invention:
1, adopt centre bore to fill explosive, an explosive cartridge is adorned in one group of emptying aperture bottom on every side, form after the Cut Blasting tubular keyhole around real hole, emptying aperture center cutting method, the explosion scope of freedom is many, avoid explosion after the big gun hole taken place by the situation of asphyxia by external pressure on the chest and abdomen;
2, emptying aperture of the present invention is than the center hole depth 1500-3000mm of keyhole.After the centre bore explosion, because the center
The hole does not have emptying aperture dark, so the explosive in the emptying aperture can not be destroyed, can be after half second in the centre bore explosion, and the explosive in the emptying aperture just normally detonates, thereby reaches the purpose that the explosion disintegrating slag in the slotting is released fully;
Vertical range 1300-the 1400m of the slotting centre-to-centre spacing digging laneway base plate that 3, will generally adopt at present reduces to 1000m; Be convenient to encrypt the via hole and the bottom outlet of keyhole below; After guaranteeing explosion; The above and below of whole excavation operation face is similar to a plane, avoids occurring leaving the phenomenon of foundation (base plate leaves the big bag of drum).
Photoface exploision of the present invention is effective, and the drilling depth rate is high, has practicality widely.
Description of drawings
Fig. 1 is that sketch map is arranged in big gun of the present invention hole.
The specific embodiment
Below in conjunction with the description of drawings specific embodiment of the present invention.
Embodiment
As shown in Figure 1; Real hole, emptying aperture center slotting driving blasting method around of the present invention; Pattern, the slotting emptying aperture that it is characterized in that comprising emptying aperture center reality hole slotting around adopting deepened powder charge, reduction slotting center, implemented the detonation mode of photoface exploision, and concrete steps are following:
1) carry out the operation of cloth hole,
1. confirm the position at slotting center; Promptly the 1/2-1/3 place apart from the vertical range h of digging laneway base plate is the slotting center; And, confirm the position at slotting center at this slotting center arrangement centre bore 7, promptly the vertical range 1m place apart from the digging laneway base plate is the slotting center; And at this slotting center arrangement centre bore 7, the hole depth of this centre bore 7 is 1900-2000mm; Be convenient to encrypt the via hole and the bottom outlet of keyhole below, guarantee explosion after, the above and below of whole excavation operation face be similar to a plane, avoids occurring leaving the phenomenon that foundation and drum wrap greatly.
2. arrange 6 emptying apertures 5 around this centre bore 7 then, the spacing of these 6 emptying apertures 5 and centre bore 7 is 73-
75mm, said 6 emptying apertures 5 form the burn cut hole with centre bore 7, and the centre bore that adopts keyhole is than conventional center hole depth 200mm; Emptying aperture is than the mode of the center hole depth 200mm of keyhole; After the centre bore explosion, the explosive in the emptying aperture can not be destroyed, can be in the centre bore explosion after half second; Explosive in the emptying aperture just normally detonates, thereby reaches the purpose that the explosion disintegrating slag in the slotting is released fully;
3. arrange via hole 2,3,4 more than three layers from inside to outside around the circumferencial direction of said keyhole; Outermost layer is a periphery hole; This periphery hole comprises that hole, arch 1, bottom outlet 8, ditch bottom outlet 9 and two help hole 6; The hole, arch 1 of said periphery hole is apart from being 400-600mm, and two help hole 6 apart from being 650-750mm, and the pitch-row of bottom outlet 8 is 500-600mm;
2) carry out charging, said centre bore is filled explosive, and an explosive cartridge is all adorned in the bottom of 6 emptying apertures 5, adopts this kind charging means, forms the tubular keyhole after the explosion, and the explosion scope of freedom is many, avoid explosion after the big gun hole taken place by the situation of asphyxia by external pressure on the chest and abdomen.Described via hole 2,3,4 is filled explosive; Hole 6 equal spaced loadings are helped in the hole, arch 1 and two of said periphery hole; 3-4 explosive cartridge of dress in each hole in hole, said arch 1; Said two help 5-6 explosive cartridge of dress in each hole in hole 6, and with the moulding of assurance photoface exploision periphery hole, described ditch bottom outlet 9 is filled explosive;
3) operation of detonating with half second detonator line, is detonated piecemeal; Firing order is that centre bore 7 detonates earlier, is 6 emptying apertures 5 then, secondly is the ground floor via hole 4 of contiguous keyhole; And the like; The outermost periphery hole bottom outlet 8 that detonates earlier is two to help hole 6 then, and what detonate at last is hole, arch 1 and ditch bottom outlet 9.
Photoface exploision of the present invention is effective, and the drilling depth rate is high, has practicality widely.
Claims (6)
1. blasting method is tunneled in an emptying aperture center reality hole slotting all around, it is characterized in that comprising pattern, slotting emptying aperture intensification powder charge, the reduction slotting center of adopting emptying aperture center reality hole slotting all around, the detonation mode of implementing photoface exploision, and concrete steps are following:
1) carry out the operation of cloth hole,
1. confirm the position at slotting center, promptly the 1/2-1/3 place apart from the vertical range height h of digging laneway base plate is the slotting center, and at this slotting center arrangement centre bore,
2. arrange one group of emptying aperture around this centre bore then, this group of emptying aperture forms keyhole with centre bore,
3. arrange via hole more than three layers from inside to outside around the circumferencial direction of said keyhole, outermost layer is a periphery hole, and this periphery hole comprises that hole, arch, bottom outlet, ditch bottom outlet and two help the hole,
2) carry out charging, said centre bore is filled explosive, and an explosive cartridge is all adorned in the bottom of said one group of emptying aperture, and described via hole is filled explosive, and the equal spaced loading in hole is helped in the hole, arch and two of said periphery hole,
3) operation of detonating with half second detonator line, is detonated piecemeal, and firing order is that centre bore detonates earlier, is one group of emptying aperture then, secondly is the ground floor via hole of contiguous keyhole, and the like; For outermost periphery hole, the bottom outlet that detonates earlier is two to help the hole then, and what detonate at last is hole, arch and ditch bottom outlet.
2. real hole, emptying aperture center slotting driving blasting method around according to claim 1, the hole depth that it is characterized in that said centre bore is 1500-3000mm.
3. real hole, emptying aperture center slotting driving blasting method around according to claim 1, the quantity that it is characterized in that described one group of emptying aperture is 3-8 emptying apertures.
4. the blasting method of real hole, emptying aperture center slotting driving is characterized in that the spacing of said one group of emptying aperture and centre bore is 70-80mm around according to claim 1, and the emptying aperture of this keyhole is than the dark 200mm of hollow hole of centre.
5. real hole, emptying aperture center slotting driving blasting method around according to claim 1, the arch pitch of holes that it is characterized in that said periphery hole is 400-600mm, and two to help pitch-row be 650-750mm, and the pitch-row of bottom outlet is 500-600mm.
6. real hole, emptying aperture center slotting driving blasting method around according to claim 1 is characterized in that adorning 3-4 explosive cartridges in each hole in hole, said arch, and said two help to adorn 5-6 explosive cartridges in each hole in hole, and said ditch bottom outlet is filled explosive.
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| CN2011104313815A CN102494572A (en) | 2011-12-21 | 2011-12-21 | Blasting method for undermining and tunnelling in mode of distributing hollow holes at periphery and solid hole in center |
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| CN2011104313815A CN102494572A (en) | 2011-12-21 | 2011-12-21 | Blasting method for undermining and tunnelling in mode of distributing hollow holes at periphery and solid hole in center |
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Cited By (13)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102997763A (en) * | 2012-11-29 | 2013-03-27 | 青海山金矿业有限公司 | Method for blasting inclined thin ore body by dividing ores and rocks in area in drift driving |
| CN103742136A (en) * | 2013-12-14 | 2014-04-23 | 金川集团股份有限公司 | Rock drilling and explosion method for mining |
| CN103868420A (en) * | 2014-03-31 | 2014-06-18 | 江西稀有金属钨业控股集团有限公司 | Mine gallery driving cut blasting method |
| CN104266557A (en) * | 2014-07-31 | 2015-01-07 | 山东华联矿业股份有限公司 | Precontrol roof sublevel ore breaking once shaft forming method |
| CN104613830A (en) * | 2014-12-18 | 2015-05-13 | 招金矿业股份有限公司夏甸金矿 | One-time-formed smooth blasting method for laneway |
| CN106225618A (en) * | 2016-08-29 | 2016-12-14 | 华北科技学院 | The method split is expanded in a kind of semo-infinite rock mass borehole blasting |
| CN107131806A (en) * | 2017-05-09 | 2017-09-05 | 深圳市中金岭南有色金属股份有限公司 | Service shaft is disposable into well blasting method |
| CN107843156A (en) * | 2016-09-20 | 2018-03-27 | 南京梅山冶金发展有限公司 | Gallery（Tunnel）The method of driving enhancing Cut Blasting efficiency |
| CN108060925A (en) * | 2017-03-06 | 2018-05-22 | 内蒙古康宁爆破有限责任公司 | The steel for shot structure of small section tunnel Cut Blasting |
| CN110953944A (en) * | 2019-11-21 | 2020-04-03 | 中交隧道工程局有限公司 | Method for rapid tunneling by hole-by-hole detonation of flat guide straight-hole cut of extra-long tunnel |
| CN112302673A (en) * | 2020-10-30 | 2021-02-02 | 何满潮 | Method for tunneling roadway by using instantaneous bursting device |
| CN113188392A (en) * | 2021-06-10 | 2021-07-30 | 嵩县金牛有限责任公司 | Well type medium-length hole perforation sectional blasting method |
| CN113340165A (en) * | 2021-06-28 | 2021-09-03 | 嵩县金牛有限责任公司 | Roadway blasting structure and blasting method |
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Cited By (18)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102997763A (en) * | 2012-11-29 | 2013-03-27 | 青海山金矿业有限公司 | Method for blasting inclined thin ore body by dividing ores and rocks in area in drift driving |
| CN103742136A (en) * | 2013-12-14 | 2014-04-23 | 金川集团股份有限公司 | Rock drilling and explosion method for mining |
| CN103868420A (en) * | 2014-03-31 | 2014-06-18 | 江西稀有金属钨业控股集团有限公司 | Mine gallery driving cut blasting method |
| CN104266557A (en) * | 2014-07-31 | 2015-01-07 | 山东华联矿业股份有限公司 | Precontrol roof sublevel ore breaking once shaft forming method |
| CN104613830A (en) * | 2014-12-18 | 2015-05-13 | 招金矿业股份有限公司夏甸金矿 | One-time-formed smooth blasting method for laneway |
| CN104613830B (en) * | 2014-12-18 | 2017-01-18 | 招金矿业股份有限公司夏甸金矿 | One-time-formed smooth blasting method for laneway |
| CN106225618A (en) * | 2016-08-29 | 2016-12-14 | 华北科技学院 | The method split is expanded in a kind of semo-infinite rock mass borehole blasting |
| CN106225618B (en) * | 2016-08-29 | 2018-06-15 | 华北科技学院 | A kind of method that semo-infinite rock mass borehole blasting expansion is split |
| CN107843156A (en) * | 2016-09-20 | 2018-03-27 | 南京梅山冶金发展有限公司 | Gallery（Tunnel）The method of driving enhancing Cut Blasting efficiency |
| CN108060925A (en) * | 2017-03-06 | 2018-05-22 | 内蒙古康宁爆破有限责任公司 | The steel for shot structure of small section tunnel Cut Blasting |
| CN107131806A (en) * | 2017-05-09 | 2017-09-05 | 深圳市中金岭南有色金属股份有限公司 | Service shaft is disposable into well blasting method |
| CN107131806B (en) * | 2017-05-09 | 2019-11-12 | 深圳市中金岭南有色金属股份有限公司 | Service shaft is disposably at well blasting method |
| CN110953944A (en) * | 2019-11-21 | 2020-04-03 | 中交隧道工程局有限公司 | Method for rapid tunneling by hole-by-hole detonation of flat guide straight-hole cut of extra-long tunnel |
| CN112302673A (en) * | 2020-10-30 | 2021-02-02 | 何满潮 | Method for tunneling roadway by using instantaneous bursting device |
| CN112302673B (en) * | 2020-10-30 | 2021-10-26 | 何满潮 | Method for tunneling roadway by using instantaneous bursting device |
| CN113188392A (en) * | 2021-06-10 | 2021-07-30 | 嵩县金牛有限责任公司 | Well type medium-length hole perforation sectional blasting method |
| CN113340165A (en) * | 2021-06-28 | 2021-09-03 | 嵩县金牛有限责任公司 | Roadway blasting structure and blasting method |
| CN113340165B (en) * | 2021-06-28 | 2024-05-24 | 嵩县金牛有限责任公司 | Tunnel blasting structure and blasting method |
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Application publication date: 20120613 |