CN1071750A - Inclined deep hole bottom spaced loading no ultra-deep blasting technology - Google Patents
Inclined deep hole bottom spaced loading no ultra-deep blasting technology Download PDFInfo
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- CN1071750A CN1071750A CN 91109725 CN91109725A CN1071750A CN 1071750 A CN1071750 A CN 1071750A CN 91109725 CN91109725 CN 91109725 CN 91109725 A CN91109725 A CN 91109725A CN 1071750 A CN1071750 A CN 1071750A
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Abstract
Inclined deep hole bottom spaced loading no ultra-deep blasting technology of the present invention belongs to the surface mining deep hole blasting technology.Major technique feature of the present invention is: with 75 ° of inclination angles of hidden hole drilling machine drill, the super dark value of holing is zero, places spacer at deep hole bottom, packs at an upper portion thereof and calculates good explosive charge, use non-electric detonator nonel tube system, adopt the compound networking of reinforcement to connect and realize that the diagonal angle detonates.Adopt this blasting technique can reduce explosive consumption, change demolition effect, neither produce foundation and make the step base plate smooth again.The present invention mainly just is used for the mine of hard following ore deposit rock.
Description
Inclined deep hole bottom spaced loading no ultra-deep blasting technology of the present invention belongs to the broken technology of surface mining deep hole waterfall.
In the surface mining deep hole blasting technology, explosive payload relatively concentrates on the step bottom, and all has super dark.The explosive payload that super deep is divided reaches about 1/3rd of whole explosive payload, and the height of step top padding is about 50～60% of shoulder height, distributes very inhomogeneous along the shoulder height explosive energy; Cause capacity usage ratio low, especially the top bulk is many.Studies show that both at home and abroad, adopt the bottom interval charge constitution, can address the above problem preferably; But after adopting the bottom interval charge constitution,, next stage step top board is crossed pulverized and cause the crack if still spacer is placed position, super deep, big gun hole, promptly unfavorable to perforation next time, increase the chance that the top bulk occurs again.
The objective of the invention is to overcome the bottom interval charge constitution and make spacer insert the disadvantage of position, super deep, invent a kind of foundation that promptly do not produce, make the no ultra-deep blasting new technology of demolition effect the best again.
Major technique feature of the present invention is: with give a farfetched interpretation 75 ° inclined hole of down-the-hole drill, blasthole diameter is the 150-170 millimeter, and boring is super to be zero deeply.Put into bamboo bar spacer, bottom interval device height is: 1.0 meters in ore, 1.2 meters on rock.The spacing value ratio of grain length (gap length with) is an ore 19～22.2%, rock 23～26%.The water hole aqueous gels, dry hole adopts No. 2 rock explosive powders; Use non-electric detonator nonel tube system, adopt and strengthen the connection of compound networking, the diagonal angle detonates.
Inclined deep hole bottom spaced loading no ultra-deep blasting technology of the present invention, its super dark value are zero, have improved the blasting energy utilization rate.Have super dark explosion to compare with the bottom interval powder charge, reduced explosive specific charge 34%, every hole can be worn 2 meters degree of depth less, and boulder yield reduces by 32%, and foundation rate is zero, and efficiency power shovel improves 15%, has reduced preshoot, backlash, does not promptly produce foundation, makes the step base plate smooth again.
Embodiment: at the Zhi Jiazhuan of Hebei province outdoors iron ore, 10 meters of this ore deposit shoulder heights adopt the perforation of YQ-150 type down-the-hole drill.150～170 millimeters of blasthole diameters, inclination angle, big gun hole is 75 °.The boring number is 77, and several 3～4 rows are arranged in the big gun hole, and array pitch is 4 meters, and pitch-row is 6 meters, and boring is super to be zero deeply, puts into bamboo bar spacer, and the spacer height is 1.0 meters, and the powder column height is 4.9 meters.Adopt No. 2 rock explosive, realize that with non-electric nonel tube, reinforcement dual priming networking the diagonal angle detonates.Blasting result: foundation is zero, and boulder yield 2.5%, explosive specific charge are 0.1001kg/T, 0.36 minute/bucket of efficiency power shovel, 10～18 meters of preshoots, 1～1.9 meter of backlash, 43233 tons of fried broken amounts.The slump line is obvious, and quick-fried heap is regular.
Inclined deep hole bottom spaced loading of the present invention does not have the broken technology of super dark waterfall, the mine of hard following rock in being mainly used in.
Claims (1)
1, the major technique of inclined deep hole bottom spaced loading no ultra-deep blasting technology of the present invention is characterised in that:
(1) inclination angle, big gun hole is 75 °, and blasthole diameter is 150～170 millimeters, and the super dark value of holing is zero.
(2) bottom interval height (spacer is long) is: 1.0 meters in ore, 1.2 meters on rock.
(3) the spacing value ratio of grain length (gap length with) is an ore 19～22.2%, rock 23～26%.
(4) aqueous gels are adopted in the water hole, and dry hole adopts No. 2 rock explosive powders, use non-electric detonator nonel tube system, adopt the compound networking of reinforcement to connect, and the diagonal angle detonates.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 91109725 CN1071750A (en) | 1991-10-17 | 1991-10-17 | Inclined deep hole bottom spaced loading no ultra-deep blasting technology |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 91109725 CN1071750A (en) | 1991-10-17 | 1991-10-17 | Inclined deep hole bottom spaced loading no ultra-deep blasting technology |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN1071750A true CN1071750A (en) | 1993-05-05 |
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN 91109725 Pending CN1071750A (en) | 1991-10-17 | 1991-10-17 | Inclined deep hole bottom spaced loading no ultra-deep blasting technology |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN1071750A (en) |
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN1058784C (en) * | 1994-06-01 | 2000-11-22 | 冯士棠 | Jetting explosive package |
| CN101319862B (en) * | 2007-06-08 | 2012-10-31 | 鞍钢集团矿业公司 | Novel horizontal trenching and vertical deep borehole initiation method for deep concave strip mine |
| CN105135962A (en) * | 2015-08-21 | 2015-12-09 | 西北矿冶研究院 | Method for improving deep-hole step blasting quality of extremely hard rock |
-
1991
- 1991-10-17 CN CN 91109725 patent/CN1071750A/en active Pending
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN1058784C (en) * | 1994-06-01 | 2000-11-22 | 冯士棠 | Jetting explosive package |
| CN101319862B (en) * | 2007-06-08 | 2012-10-31 | 鞍钢集团矿业公司 | Novel horizontal trenching and vertical deep borehole initiation method for deep concave strip mine |
| CN105135962A (en) * | 2015-08-21 | 2015-12-09 | 西北矿冶研究院 | Method for improving deep-hole step blasting quality of extremely hard rock |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C10 | Entry into substantive examination | ||
| SE01 | Entry into force of request for substantive examination | ||
| C06 | Publication | ||
| PB01 | Publication | ||
| C01 | Deemed withdrawal of patent application (patent law 1993) | ||
| WD01 | Invention patent application deemed withdrawn after publication |