CN103452558B - A kind of cutting method of sublevel caving method mining - Google Patents
A kind of cutting method of sublevel caving method mining Download PDFInfo
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- CN103452558B CN103452558B CN201310396825.5A CN201310396825A CN103452558B CN 103452558 B CN103452558 B CN 103452558B CN 201310396825 A CN201310396825 A CN 201310396825A CN 103452558 B CN103452558 B CN 103452558B
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Abstract
The present invention discloses the cutting method of a kind of sublevel caving method mining, upwards drives in cutting tunnel, it is characterized in that comprising the steps: that a will do cutting well position, arranges two row large aperture medium-length holes by cutting well design height uniform parallel; Its large aperture diameter is 120-200mm, and limit, hole spacing is 100-150mm; Arrange two explosive broken medium-length holes at cutting side, tunnel, the edge uniform parallel often arranging large aperture medium-length hole, its aperture is 55-75mm; Short-delay blasting is carried out to two explosive broken medium-length holes; After second row explosion medium-length hole uniform parallel arrange the 3rd explosive broken medium-length hole, pitch of holes and and second row explosion medium-length hole between array pitch be 500-600mm, carry out second time explosion; B is from after the 3rd round, and uniform parallel arranges explosion medium-length hole by row successively, and pitch-row and array pitch are 800-1200mm, and one time one explosive broken or once two arrange short-delay blastings.
Description
Technical field
The present invention relates to the cutting method of a kind of sublevel caving method mining.
Background technology
Sublevel caving is that metal mine underground mining generally applies a kind of method, the stoping operation of this mining methods all carries out in stope drift active workings, cutting tunnel is substantially perpendicular to stope drift active workings, cutting end, tunnel is made with cutting well, to cut well as the scope of freedom, in cutting tunnel, carry out cutting medium-length hole blasting, medium-length hole blasting free space is just being arranged in pull-out, just just arranges medium-length hole blasting, carries out stoping operation.
Its cutting carries out in the cutting tunnel in each substoping nugget, and its cutting method is:
One be cutting tunnel both ends or one end common law first do cutting well (common law uses overhead driller rock drilling exactly, sets up platform with timber, carries out driling explosion construction, drives design height;
Two is from cutting well position, by less bottom hole pitch and array pitch, to fan shaped medium length hole constructs on carrying out by row in cutting lane;
Three is cut well for the scope of freedom, carries out each row or two row's cutting fan shaped round blastings from cutting well position.
Cutting room is formed by above three steps.
This cutting technique Problems existing is:
One is need manually to do cutting well, and cutting well height is general to be existed work high above the ground, blasting fume poisoning, side fall roof etc. potential safety hazard all at about 15-25m, drive constructional difficulties, long in time limit.The aperture explosive payload of fan shaped medium length hole is concentrated, and powder charge is not easy to control, and easily occurs bulk after explosion, and after explosion, lower cinder notch affects comparatively greatly by lateral opening, is sometimes not easy slag.
Summary of the invention
For overcoming the shortcoming of above-mentioned prior art, the technical problem to be solved in the present invention is to provide the cutting method of a kind of sublevel caving method mining, does not drive cutting well specially, does not make fan-shaped cutting construction, is all realized the method for cutting by parallel hole explosion.
For achieving the above object, the present invention is achieved by following technical proposals:
A cutting method for sublevel caving method mining, upwards drives in cutting tunnel, it is characterized in that comprising the steps: that a will do cutting well position, arranges two row large aperture medium-length holes by cutting well design height uniform parallel; Its large aperture diameter is 120-200mm, and limit, hole spacing is 100-150mm; Arrange two explosive broken medium-length holes at cutting side, tunnel, the edge uniform parallel often arranging large aperture medium-length hole, its aperture is 55-75mm; Short-delay blasting is carried out to two explosive broken medium-length holes; After second row explosion medium-length hole uniform parallel arrange the 3rd explosive broken medium-length hole, pitch of holes and and second row explosion medium-length hole between array pitch be 500-600mm, carry out second time explosion; B is from after the 3rd round, and uniform parallel arranges explosion medium-length hole by row successively, and pitch-row and array pitch are 800-1200mm, and one time one explosive broken or once two arrange short-delay blastings.
The present invention for the scope of freedom with the parallel medium-length hole in large aperture, solves the safety problem that artificial construction's courtyard brings, saves manpower and materials simultaneously, strengthens crushing effect with parallel medium depth holes millisecond blasting, forms cutting well free space.The even cloth hole explosion of parallel medium-length hole, ensure that breaking size, reduces the human and material resources consumption of secondary blasting, reduces labour intensity, improve production efficiency.
Accompanying drawing explanation
Fig. 1 is the cutting method floor map of sublevel caving method mining.
Fig. 2 is explosion on line mode schematic diagram.
Wherein, 1 be large aperture medium-length hole, 2 is explosion medium-length holes, 3 is cutting well positions, 4 are cutting tunnels, 1' be the first row explosion medium-length hole section of detonating not, 2' be the second row explosion medium-length hole section of detonating not, 3' is that the 3rd explosive broken medium-length hole section of detonating is other.
Detailed description of the invention
Below in conjunction with accompanying drawing, the invention will be further described:
As shown in Figure 1, a kind of cutting method of sublevel caving method mining, upwards drive in cutting tunnel 4, a cuts the formation of well free space: do cutting well position 3, select diameter to be 120-200mm drill bit, be evenly arranged large aperture medium-length hole 1 liang row, as the explosion scope of freedom by cutting well design height is parallel, the diameter of each large aperture medium-length hole 1 is 120-200mm, and limit, hole spacing is 100-150mm; Two explosive broken medium-length holes 2 are arranged at cutting side, tunnel 4, the edge uniform parallel of two row large aperture medium-length holes 1, carry out short-delay blasting, two round millisecond times are less than or equal to 25ms, guarantee that the entity between each large aperture medium-length hole 1 can be fully broken, the quick-fried slag fallen is gone out only, just form " cutting well " free space; For improving " cutting well " effect, after second row explosion medium-length hole 2, uniform parallel arranges the 3rd explosive broken medium-length hole 2, pitch of holes and be 500-600mm with second row explosion medium-length hole 2 array pitch, second time explosion is carried out to the 3rd explosive broken medium-length hole 2, expand the scope of " cutting well " free space further, and increase compensating space in blasting, ensure that normally carrying out of ensuing blast medium-length hole 2 explosion.
Wherein, large aperture medium-length hole 1 and the height of explosion medium-length hole 2, according to the design of production actual needs, be generally 12-30m.One row large aperture medium-length hole 1 number is 8-10, two rows 16-20 altogether.
After the 3rd explosive broken medium-length hole 2, uniform parallel arranges explosion medium-length hole 2 successively, and pitch-row and array pitch 800-1200mm; One explosive broken or once two row's short-delay blastings, ensure that demolition effect, thus ensure cutting effect.
The blasting method of this cutting method as shown in Figure 2, in explosion on line figure, first row explosion medium-length hole 2 and second row explosion medium-length hole 2 link together and carry out short-delay blasting, the other 1' of the first row explosion medium-length hole section of detonating differs with the other 2' time delay of the second row explosion medium-length hole section of detonating and is less than or equal to 25ms, wherein the other 1' time delay of the first row explosion medium-length hole section of detonating is less than the other 2' of the second row explosion medium-length hole section of detonating, therefore the first explosion of the first round, explosion after second round, explosion is slagged tap after formation " cutting well ", again the other 3' of the 3rd explosive broken medium-length hole section of detonating is detonated operation, large " cutting well " space of further brush.Afterwards, bursting work is carried out to parallel explosion medium-length hole 2 in cutting tunnel 4: onepull one is arranged or once two row's short-delay blastings, and slagging tap in explosion limit, limit, ensure that driling explosion effect, make cutting everything goes well with your work to terminate.
Claims (2)
1. a cutting method for sublevel caving method mining, upwards drives in cutting tunnel, it is characterized in that comprising the steps: that a will do cutting well position, arranges two row large aperture medium-length holes by cutting well design height uniform parallel; Its large aperture diameter is 120-200mm, and limit, hole spacing is 100-150mm; Arrange two explosive broken medium-length holes at cutting side, tunnel, the edge uniform parallel often arranging large aperture medium-length hole, its aperture is 55-75mm; Short-delay blasting is carried out to two explosive broken medium-length holes; After second row explosion medium-length hole uniform parallel arrange the 3rd explosive broken medium-length hole, pitch of holes and and second row explosion medium-length hole between array pitch be 500-600mm, carry out second time explosion; B is from after the 3rd round, and uniform parallel arranges explosion medium-length hole by row successively, and pitch-row and array pitch are 800-1200mm, and one time one explosive broken or once two arrange short-delay blastings.
2. the cutting method of sublevel caving method mining according to claim 1, is characterized in that: described short-delay blasting millisecond time is less than 25ms.
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| CN201310396825.5A CN103452558B (en) | 2013-09-04 | 2013-09-04 | A kind of cutting method of sublevel caving method mining |
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| CN201310396825.5A CN103452558B (en) | 2013-09-04 | 2013-09-04 | A kind of cutting method of sublevel caving method mining |
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| CN103452558B true CN103452558B (en) | 2015-08-05 |
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| CN110530219B (en) * | 2019-09-06 | 2021-11-12 | 中钢集团马鞍山矿山研究院有限公司 | Controlled blasting method for reducing loss and dilution |
| CN110823034A (en) * | 2019-11-25 | 2020-02-21 | 中交路桥建设有限公司 | Soft rock foundation blasting method capable of controlling mass percentage after blasting |
Citations (2)
| Publication number | Priority date | Publication date | Assignee | Title |
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| CN102518438A (en) * | 2012-01-06 | 2012-06-27 | 中南大学 | Roof regeneration medium-length hole ore blast backfill mining method |
| CN102748029A (en) * | 2012-07-05 | 2012-10-24 | 北京矿冶研究总院 | Sectional mining method |
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| US4043596A (en) * | 1975-08-11 | 1977-08-23 | Occidental Oil Shale, Inc. | Forming shale oil recovery retort by blasting into slot-shaped columner void |
| SU1136527A1 (en) * | 1983-08-11 | 1992-01-07 | Государственный Макеевский Научно-Исследовательский Институт По Безопасности Работ В Горной Промышленности | Electric hydraulic installation for well breaking down of rock |
| RU2055303C1 (en) * | 1993-05-21 | 1996-02-27 | Московский государственный горный университет | Process of blast breaking of rocks with stratified texture in stripping |
| RU2290597C2 (en) * | 2004-06-25 | 2006-12-27 | Геннадий Буржалиевич Алиев | Method for conducting of drilling and blasting operations |
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Patent Citations (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102518438A (en) * | 2012-01-06 | 2012-06-27 | 中南大学 | Roof regeneration medium-length hole ore blast backfill mining method |
| CN102748029A (en) * | 2012-07-05 | 2012-10-24 | 北京矿冶研究总院 | Sectional mining method |
Non-Patent Citations (1)
| Title |
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| "分段崩落采矿法的应用_续二";不明;《有色矿山》;19740531;3-4页 * |
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Address after: 114001 Anshan District, Liaoning, No. 219 Road, No. 39, Tiedong Patentee after: Anshan Iron and Steel Group Mining Co., Ltd. Address before: 114001 Anshan District, Liaoning, No. 219 Road, No. 39, Tiedong Patentee before: Anshan Iron & Steel Group Mining Co., Ltd. |