CN104132592A - Heading pit secondary pressing top exploding method - Google Patents
Heading pit secondary pressing top exploding method Download PDFInfo
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- CN104132592A CN104132592A CN201410373543.8A CN201410373543A CN104132592A CN 104132592 A CN104132592 A CN 104132592A CN 201410373543 A CN201410373543 A CN 201410373543A CN 104132592 A CN104132592 A CN 104132592A
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Abstract
The invention provides a heading pit secondary pressing top exploding method and belongs to the field of mine exploding methods. A heading pit is excavated, the depth of the heading pit is 2 m, then exploding holes which are distributed in an arc shape are punched at a heading pit inlet according to roadway size, the depth of the holes is 4 m, the part formed by the arc-shape-distributed exploding holes and the top of the heading pit forms a pressing top with the length of 4 m, stick explosives are arranged in the exploding holes, the space distance between two adjacent stick explosives is 0.7m, the stick explosives are connected to a detonating cord which extends to a safe detonating position outside the heading pit, six auxiliary hole layers are evenly punched at the part, shorter than the pressing top, of the heading pit, 11 groove holes which are distributed in a rectangular shape are punched in the middle of the part, accordingly, the stress structure of a rock layer is damaged, the processes are repeated until a roadway is excavated to the needed depth, vibration of blasting can be low, and a contour formed by blasting is good.
Description
Technical field
The invention provides a kind of cave secondary blasting method of bearing down on one of leading, belong to mine blasting method field.
Background technology
The construction of existing underworkings often adopts on the profile in the disposable tunnel in required construction and punches, and explosive is installed and is carried out explosion, but the stressed relation due to rock, very poor of the profile that enclosed blast can make tunnel, the required dynamics of destruction with bottom is excessive, can make the upwards active force of explosive increase, and the top in tunnel is damaged, and can cause compared with big bang, thereby cause the generation of other accidents.
Summary of the invention
The object of the invention is to provide a kind of cave secondary blasting method of bearing down on one of leading, and can make concussion of blasting profile little and that explosion forms good.
Of the present inventionly lead the blasting method of bearing down on one of cave secondary, it is characterized in that:
(1) excavate and to lead cave, the degree of depth that makes to lead cave is 2m, is then leading cave porch, is the blast hole of circular arc by tunnel size marking cloth, hole depth 4m, the blast hole that circular arc distributes with lead the part that sketch the contours of at cave top, form long the bearing down on one of 4m.
(2) explosive cartridge is installed in blast hole, between two adjacent explosive cartridges, is spaced apart 0.7m, explosive cartridge is all connected to primacord, and primacord extends to the safe detonation position of leading outside cave.
(3) be shorter than the part of bearing down on one and make a call to six layer via hole uniformly, and in the centre position of this part, make a call to the slotted eye of 11 rectangular distributions leading cave, with this, destroy the force structure of lithosphere.
(4) repeat above process, until the needed degree of depth is excavated in tunnel.
Described lead the blasting method of bearing down on one of cave secondary, first according to the profile in tunnel, excavate the cave of leading of a dark 2m, make bottom, tunnel have the part hollow of two meters, then at profile top, tunnel, explode holes, Yu Daodong top, hole has formed bears down on one, it by the severity control bearing down on one, at 4m, is the twice of leading cave, then to filling out in the blast hole bearing down on one, put explosive, beat via hole prolonging on the bearing of trend of leading cave excavation direction again, destroy the load-carrying members of the rock of the below of bearing down on one, the explosive photoface exploision of bearing down on one is so only installed at the place of bearing down on one, reduced the use amount of explosive, and destruction structure and gravity have been utilized, complete explosion, vibrations have been reduced, the cave of leading because of below only has half of bearing down on one simultaneously, and structural deterioration, support force upwards reduces, when explosive charge, just reduced the active force of explosive to top, tunnel, reduced the destruction to top, tunnel, guaranteed the integrality of tunnel profile.
The present invention compared with prior art beneficial effect is:
Described lead the blasting method of bearing down on one of cave secondary, first according to the profile in tunnel, excavate the cave of leading of a dark 2m, make bottom, tunnel have the part hollow of two meters, then at profile top, tunnel, explode holes, Yu Daodong top, hole has formed bears down on one, it by the severity control bearing down on one, at 4m, is the twice of leading cave, then to filling out in the blast hole bearing down on one, put explosive, beat via hole prolonging on the bearing of trend of leading cave excavation direction again, destroy the load-carrying members of the rock of the below of bearing down on one, the explosive photoface exploision of bearing down on one is so only installed at the place of bearing down on one, reduced the use amount of explosive, and destruction structure and gravity have been utilized, complete explosion, vibrations have been reduced, the cave of leading because of below only has half of bearing down on one simultaneously, and structural deterioration, support force upwards reduces, when explosive charge, just reduced the active force of explosive to top, tunnel, reduced the destruction to top, tunnel, guaranteed the integrality of tunnel profile.
Accompanying drawing explanation
Fig. 1 is embodiment of the present invention structural representation;
Fig. 2 is profile diagram of the present invention.
In figure: 1, mine; 2, lead cave; 3, bear down on one; 4, blast hole; 5, via hole; 6, slotted eye.
The specific embodiment
Below in conjunction with the present invention, the embodiment of the present invention is described further:
Embodiment 1: as depicted in figs. 1 and 2, of the present inventionly lead the blasting method of bearing down on one of cave secondary, it is characterized in that:
(1) on mine 1, excavate and lead cave 2, the degree of depth that makes to lead cave 2 is 2m, is then leading cave 2 porch, the blast hole 4 that is circular arc by tunnel size marking cloth, hole depth 4m, the blast hole 4 that circular arc distributes with lead the part that sketch the contours of at cave 2 tops, form long the bearing down on one of 4m.
(2) in blast hole 4, explosive cartridge is installed, between two adjacent explosive cartridges, is spaced apart 0.7m, explosive cartridge is all connected to primacord, and primacord extends to the safe detonation position of leading outside cave 2.
(3) be shorter than 3 the part of bearing down on one and make a call to six layer via hole 5 uniformly, and in the centre position of this part, make a call to the slotted eye 6 of 11 rectangular distributions leading cave 2, with this, destroy the force structure of lithosphere.
(4) repeat above process, until the needed degree of depth is excavated in tunnel.
Operating procedure and operation principle:
Described lead the blasting method of bearing down on one of cave secondary, that first according to the profile in tunnel, excavates a dark 2m leads cave 2, make bottom, tunnel have the part hollow of two meters, then at profile top, tunnel, explode holes 4, blast hole 4 with lead cave 2 tops and formed and bear down on one 3, by bearing down on one, 3 severity control is the twice of leading cave 2 at 4m, then to filling out in 3 the blast hole 4 of bearing down on one, put explosive, on the bearing of trend of leading cave 2 excavation directions, beat via hole 5 prolonging again, destroy the load-carrying members of the rock of 3 belows of bearing down on one, explosives 3 photoface exploisions of bearing down on one are so only installed at 3 places of bearing down on one, reduced the use amount of explosive, and destruction structure and gravity have been utilized, complete explosion, vibrations have been reduced, simultaneously because of below lead cave 2 only have bear down on one 3 half, and structural deterioration, support force upwards reduces, when explosive charge, just reduced the active force of explosive to top, tunnel, reduced the destruction to top, tunnel, guaranteed the integrality of tunnel profile.
Claims (1)
1. lead the blasting method of bearing down on one of cave secondary, it is characterized in that:
(1) excavate and to lead cave, the degree of depth that makes to lead cave is 2m, is then leading cave porch, is the blast hole of circular arc by tunnel size marking cloth, hole depth 4m, the blast hole that circular arc distributes with lead the part that sketch the contours of at cave top, form long the bearing down on one of 4m.
(2) explosive cartridge is installed in blast hole, between two adjacent explosive cartridges, is spaced apart 0.7m, explosive cartridge is all connected to primacord, and primacord extends to the safe detonation position of leading outside cave.
(3) be shorter than the part of bearing down on one and make a call to six layer via hole uniformly, and in the centre position of this part, make a call to the slotted eye of 11 rectangular distributions leading cave, with this, destroy the force structure of lithosphere.
(4) repeat above process, until the needed degree of depth is excavated in tunnel.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201410373543.8A CN104132592A (en) | 2014-07-31 | 2014-07-31 | Heading pit secondary pressing top exploding method |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201410373543.8A CN104132592A (en) | 2014-07-31 | 2014-07-31 | Heading pit secondary pressing top exploding method |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN104132592A true CN104132592A (en) | 2014-11-05 |
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201410373543.8A Pending CN104132592A (en) | 2014-07-31 | 2014-07-31 | Heading pit secondary pressing top exploding method |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN106089216A (en) * | 2016-07-19 | 2016-11-09 | 北京交通大学 | Rock tunnel breaks rock construction method |
Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101191416A (en) * | 2006-11-27 | 2008-06-04 | 杨仁树 | Rock lane digging method |
| CN101568697A (en) * | 2006-12-22 | 2009-10-28 | 山特维克矿山工程机械有限公司 | Designing drilling pattern for excavating rock cavern |
| CN101846484A (en) * | 2010-04-02 | 2010-09-29 | 攀钢集团冶金工程技术有限公司 | Blasting method of driving, mining and cutting drift under ultrahard fault |
| CN102758633A (en) * | 2011-04-29 | 2012-10-31 | 中国华冶科工集团有限公司 | Construction method for large- cross section tunnel with better condition of surrounding rock |
-
2014
- 2014-07-31 CN CN201410373543.8A patent/CN104132592A/en active Pending
Patent Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101191416A (en) * | 2006-11-27 | 2008-06-04 | 杨仁树 | Rock lane digging method |
| CN101568697A (en) * | 2006-12-22 | 2009-10-28 | 山特维克矿山工程机械有限公司 | Designing drilling pattern for excavating rock cavern |
| CN101846484A (en) * | 2010-04-02 | 2010-09-29 | 攀钢集团冶金工程技术有限公司 | Blasting method of driving, mining and cutting drift under ultrahard fault |
| CN102758633A (en) * | 2011-04-29 | 2012-10-31 | 中国华冶科工集团有限公司 | Construction method for large- cross section tunnel with better condition of surrounding rock |
Non-Patent Citations (1)
| Title |
|---|
| 侯宝宁: ""洮河九甸峡水利枢纽导流隧洞工程大断面爆破技术"", 《甘肃农业》 * |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN106089216A (en) * | 2016-07-19 | 2016-11-09 | 北京交通大学 | Rock tunnel breaks rock construction method |
| CN106089216B (en) * | 2016-07-19 | 2019-01-04 | 北京交通大学 | Rock tunnel broken rock construction method |
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Application publication date: 20141105 |