CN102374833A - Mine gallery excavation blasting method - Google Patents
Mine gallery excavation blasting method Download PDFInfo
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- CN102374833A CN102374833A CN2011102933601A CN201110293360A CN102374833A CN 102374833 A CN102374833 A CN 102374833A CN 2011102933601 A CN2011102933601 A CN 2011102933601A CN 201110293360 A CN201110293360 A CN 201110293360A CN 102374833 A CN102374833 A CN 102374833A
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Abstract
The invention discloses a mine gallery excavation blasting method, comprising the steps of: cutting a cut hole at the substantial center of the working face; blasting a plurality of blast holes at the preset position of the working face, wherein the plurality of blast holes surround the blast hole ring of the cut hole, and the cut hole is larger than each blast hole; filling explosive in each blast hole; and detonating by using a millisecond blasting technology. According to the mine gallery excavation blasting method provided by the invention, the cut hole is placed at the substantial center of the working face and is larger than each blast hole, therefore, the blasting efficiency of gallery excavation can be enhanced so that the maximization of a free face in excavation blasting can be achieved.
Description
Technical field
The present invention relates to the mining technique field, particularly relate to a kind of mine heading blasting method.
Background technology
The at present domestic method that in the light section tunnelling work of mine, down-hole, increases the explosion scope of freedom mainly is to beat keyhole.Conventional way be at the center big gun hole around beat a plurality of keyholes and the big gun hole is consistent with the aperture of keyhole, demolition effect is about 80%.
Beating keyhole can be divided into according to its direction: angled cut, burn cut, combinational cut.
1, angled cut: be meant each borehole and tunnel center line and working face horizontal direction at angle.Its advantage is that the slotting volume is bigger, can the rock in the slotting all be dished out, and forms the effective scope of freedom, and effect guarantees easily, eye position easy master.Its shortcoming cut depth that has a cast in the eye is limited by span length, is not suitable for deep hole blasting, during many bench drills machine operation, interferes with each other.Segmentation can be divided into again: monocline slotting, fan cut, cone cut, V-cut.
2, burn cut: the direction that is meant all keyholes is all perpendicular to the tunnel working face, and the keyhole distance is less, and strict keeping parallelism.Its advantage is: slotted eyes is parallel to each other, and is convenient to realize the parallel operations of many bench drills machine and adopts the drill jumbo operation; Rock fragmentation is even after the explosion, and casting distance is nearer, in the quick-fried heap, is convenient to the muck of cleaning the street.Its shortcoming is: spacing, jewel hole quality and powder charge etc. to keyhole are strict, are difficult for grasping, and required slotted eyes number and explosive consumption are on the high side, and the slotting volume is little, and the slotting effect is not as angled cut.Segmentation can be divided into straight-cut, rhombus diging groove, triangular prism slotting, five-pointed star slotting, spiral slotting again.
3, hybrid slotting is meant the mode perforating of adopting straight eye and strabismus combinational cut, and strabismus is made vertical wedge-like and arranged, is arranged in straight the outside, and the angle of strabismus and working face is the 75-85 degree, eyeground and apart about 0.2 meter of straight eye.
Summary of the invention
Applicant of the present invention at first is familiar with and recognizes, in the light section tunnelling of reality, because the underground work faciostenosis; Can't use drill jumbo, majority can only two rock drill operations simultaneously, perforating is consuming time more; And the difficult quality that guarantees keyhole, finally cause demolition effect not good.
The present invention is intended to one of solve the problems of the technologies described above at least.
For this reason, one object of the present invention is to propose a kind ofly can improve blasting efficiency, thereby can realize tunneling the maximized mine heading blasting method on the explosion scope of freedom.
Mine heading blasting method according to the embodiment of the invention may further comprise the steps: keyhole is beaten in the cardinal principle center at working face; Beat a plurality of big guns hole in the precalculated position of working face, said a plurality of big guns hole constitutes the big gun orifice ring around said keyhole, and wherein, the aperture of said keyhole is greater than the aperture in said each big gun hole; In each said big gun hole, load explosive; Detonate with employing short-delay blasting.
Mine heading blasting method according to the embodiment of the invention; Keyhole is positioned at the aperture of cardinal principle center and keyhole of working face greater than the aperture in each big gun hole; The blasting efficiency of tunnelling can be improved, thereby the maximization on the explosion scope of freedom can be realized tunneling.
In addition, mine heading blasting method according to the above embodiment of the present invention can also have following additional technical characterictic:
Mine heading blasting method according to an embodiment of the invention, the aperture of said keyhole are that the hole depth of 100mm and said keyhole is 20m.
Mine heading blasting method according to an embodiment of the invention, the aperture in said each big gun hole is 38mm.
Additional aspect of the present invention and advantage part in the following description provide, and part will become obviously from the following description, or recognize through practice of the present invention.
Description of drawings
Above-mentioned and/or additional aspect of the present invention and advantage obviously with are easily understood becoming the description of embodiment from combining figs, wherein:
Fig. 1 adopts mine heading blasting method according to an embodiment of the invention to carry out the working face sketch map of tunnel blasting.
The specific embodiment
Describe embodiments of the invention below in detail, the example of said embodiment is shown in the drawings, and wherein identical from start to finish or similar label is represented identical or similar elements or the element with identical or similar functions.Be exemplary through the embodiment that is described with reference to the drawings below, only be used to explain the present invention, and can not be interpreted as limitation of the present invention.
In description of the invention; It will be appreciated that; The orientation of indications such as term " " center ", " vertically ", " laterally ", " on ", D score, " preceding ", " back ", " left side ", " right side ", " vertically ", " level ", " top ", " end " " interior ", " outward " or position relation are for based on orientation shown in the drawings or position relation; only be to describe with simplifying for the ease of describing the present invention; rather than the device or the element of indication or hint indication must have specific orientation, with specific azimuth configuration and operation, therefore can not be interpreted as limitation of the present invention.
In addition, term " first ", " second " only are used to describe purpose, and can not be interpreted as indication or hint relative importance.
In description of the invention, need to prove that only if clear and definite regulation and qualification are arranged in addition, term " installation ", " linking to each other ", " connection " should be done broad understanding, for example, can be to be fixedly connected, connect integratedly, also can be to removably connect; Can be mechanical connection or electrical connection, also can be the connection of two element internals; Can be directly to link to each other, also can link to each other indirectly, for those of ordinary skill in the art, can understand the concrete implication of above-mentioned term as the case may be through intermediary.
Describe mine heading blasting method in detail with reference to accompanying drawing below according to the embodiment of the invention.
As shown in Figure 1, the mine heading blasting method according to the embodiment of the invention may further comprise the steps:
At first, adopt in the cardinal principle center of the working face 100 in tunnel and beat keyhole 1001 such as rig.
Secondly, adopt rock drill to beat a plurality of big guns hole in the precalculated position of working face 100.A plurality of big guns hole constitutes the big gun orifice ring around keyhole 1001.Wherein, the aperture of keyhole 1001 is greater than the aperture in each big gun hole.
Once more, in each said big gun hole, load explosive.
At last, adopt short-delay blasting to detonate.
Mine heading blasting method according to the embodiment of the invention; Keyhole 1001 is positioned at the aperture of cardinal principle center and keyhole 1001 of working face greater than the aperture in each big gun hole; And a plurality of big guns hole constitutes the big gun orifice ring around keyhole 1001; The blasting efficiency of tunnelling can be improved, thereby the maximization on the explosion scope of freedom can be realized tunneling.
That is to say, as shown in Figure 1, when explosion, detonate at first successively around first to the 5th big gun hole of keyhole 1001, because the aperture of keyhole 1001 is bigger, can form the explosion scope of freedom well; Then, detonate successively in the 6th to the tenth Second Artillery Force hole, can enlarge the explosion scope of freedom well; Once more, detonate successively in the 13 to the 18 big gun hole, can further enlarge the explosion scope of freedom; At last, detonate successively in the 19 to the 34 big gun hole, can be that the explosion scope of freedom covers whole tunnel working face 100.
The present inventor is surprised to find, and when the aperture of keyhole 1001 is a hole depth that 100mm and keyhole 1001 creep into when being 20m at every turn, blasting efficiency can reach 91%, greatly reduces operating personnel's labour intensity.
According to a concrete example of the present invention, when the aperture in each big gun hole was 38mm, production cost had been practiced thrift in the maximization that can adopt minimum dynamite charge amount to realize tunneling the explosion scope of freedom greatly.
Mine heading blasting method according to the embodiment of the invention has improved the blasting efficiency of tunnelling, and blasting efficiency can reach 91%, has reduced operating personnel's labour intensity, has improved the cross section quality of tunnelling simultaneously.
In the description of this specification, the description of reference term " embodiment ", " some embodiment ", " example ", " concrete example " or " some examples " etc. means the concrete characteristic, structure, material or the characteristics that combine this embodiment or example to describe and is contained at least one embodiment of the present invention or the example.In this manual, the schematic statement to above-mentioned term not necessarily refers to identical embodiment or example.And concrete characteristic, structure, material or the characteristics of description can combine with suitable manner in any one or more embodiment or example.
Although illustrated and described embodiments of the invention; Those having ordinary skill in the art will appreciate that: under the situation that does not break away from principle of the present invention and aim, can carry out multiple variation, modification, replacement and modification to these embodiment, scope of the present invention is limited claim and equivalent thereof.
Claims (3)
1. a mine heading blasting method is characterized in that, may further comprise the steps:
Keyhole is beaten in cardinal principle center at working face;
Beat a plurality of big guns hole in the precalculated position of working face, said a plurality of big guns hole constitutes the big gun orifice ring around said keyhole, and wherein, the aperture of said keyhole is greater than the aperture in said each big gun hole;
In each said big gun hole, load explosive; Detonate with employing short-delay blasting.
2. mine heading blasting method according to claim 1 is characterized in that, the aperture of said keyhole is that the hole depth of 100mm and said keyhole is 20m.
3. mine heading blasting method according to claim 1 is characterized in that the aperture in said each big gun hole is 38mm.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2011102933601A CN102374833A (en) | 2011-09-29 | 2011-09-29 | Mine gallery excavation blasting method |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2011102933601A CN102374833A (en) | 2011-09-29 | 2011-09-29 | Mine gallery excavation blasting method |
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| CN102374833A true CN102374833A (en) | 2012-03-14 |
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| CN2011102933601A Pending CN102374833A (en) | 2011-09-29 | 2011-09-29 | Mine gallery excavation blasting method |
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Cited By (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102878876A (en) * | 2012-10-08 | 2013-01-16 | 江西稀有稀土金属钨业集团有限公司 | Mine roadway advancing and undermining method and main blasting parameters |
| CN103471475A (en) * | 2013-09-18 | 2013-12-25 | 中南大学 | Gradual deepening type hole bottom compensation spiral forceful slotting method |
| CN103696770A (en) * | 2013-12-17 | 2014-04-02 | 武汉工程大学 | Cutting raise cutting method used in underground mining |
| CN107143337A (en) * | 2017-05-23 | 2017-09-08 | 西北矿冶研究院 | Rapid construction method for underground roadway |
| CN109539913A (en) * | 2018-11-16 | 2019-03-29 | 西北矿冶研究院 | Arrangement method of spiral cut hole for access filling mining |
| CN110514077A (en) * | 2019-07-31 | 2019-11-29 | 四川华蓥山龙滩煤电有限责任公司 | A kind of method in speedy drivage competent bed tunnel |
Citations (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US5634691A (en) * | 1994-07-13 | 1997-06-03 | Sungkyong Engineering & Construction Limited | Method for excavating a working face by blasting |
| CN101762218A (en) * | 2009-10-30 | 2010-06-30 | 湖州新开元碎石有限公司 | Hole-by-hole blasting method |
-
2011
- 2011-09-29 CN CN2011102933601A patent/CN102374833A/en active Pending
Patent Citations (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US5634691A (en) * | 1994-07-13 | 1997-06-03 | Sungkyong Engineering & Construction Limited | Method for excavating a working face by blasting |
| CN101762218A (en) * | 2009-10-30 | 2010-06-30 | 湖州新开元碎石有限公司 | Hole-by-hole blasting method |
Non-Patent Citations (3)
| Title |
|---|
| 《安徽冶金》 20011231 陈昌聪 在坚固岩层中提高平巷掘进爆破率的实践 表5 1-3 , 第2期 * |
| 车大兵: "新建永和隧道的减震爆破施工技术总结", 《西部探矿工程》, no. 1, 31 December 2007 (2007-12-31), pages 142 - 145 * |
| 陈昌聪: "在坚固岩层中提高平巷掘进爆破率的实践", 《安徽冶金》, no. 2, 31 December 2001 (2001-12-31), pages 5 * |
Cited By (8)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102878876A (en) * | 2012-10-08 | 2013-01-16 | 江西稀有稀土金属钨业集团有限公司 | Mine roadway advancing and undermining method and main blasting parameters |
| CN103471475A (en) * | 2013-09-18 | 2013-12-25 | 中南大学 | Gradual deepening type hole bottom compensation spiral forceful slotting method |
| CN103471475B (en) * | 2013-09-18 | 2015-10-07 | 中南大学 | One gradually compensates spirality strong cutting method at the bottom of dark formula hole |
| CN103696770A (en) * | 2013-12-17 | 2014-04-02 | 武汉工程大学 | Cutting raise cutting method used in underground mining |
| CN103696770B (en) * | 2013-12-17 | 2016-01-06 | 武汉工程大学 | Underground mining upward incise kerve method |
| CN107143337A (en) * | 2017-05-23 | 2017-09-08 | 西北矿冶研究院 | Rapid construction method for underground roadway |
| CN109539913A (en) * | 2018-11-16 | 2019-03-29 | 西北矿冶研究院 | Arrangement method of spiral cut hole for access filling mining |
| CN110514077A (en) * | 2019-07-31 | 2019-11-29 | 四川华蓥山龙滩煤电有限责任公司 | A kind of method in speedy drivage competent bed tunnel |
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Application publication date: 20120314 |