CN103868420A - Mine gallery driving cut blasting method - Google Patents
Mine gallery driving cut blasting method Download PDFInfo
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- CN103868420A CN103868420A CN201410124523.7A CN201410124523A CN103868420A CN 103868420 A CN103868420 A CN 103868420A CN 201410124523 A CN201410124523 A CN 201410124523A CN 103868420 A CN103868420 A CN 103868420A
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Abstract
The invention relates to a mine gallery driving cut blasting method which includes the steps that a center blasting hole perpendicular to a working plane is drilled in the center of the gallery driving working plane, five to eight evenly-distributed peripheral holes are drilled in the circumference with the center blasting hole of the working plane as the circle center and the radius ranging from 9 cm to 12 cm, the depth of the center blasting hole is 20 cm-40 cm larger than the depths of the surrounding peripheral holes, the depths of the surrounding peripheral holes are equal, the center blasting hole and the surrounding peripheral holes are parallel to each other, the center blasting hole serves as a powder filling hole, the surrounding peripheral holes are hollow holes, hole openings are packed with stemming after the center blasting hole is filled with an explosive reel and a blasting cap connected with an explosion conducting pipe, when explosives in the center blasting hole are detonated, the hollow peripheral holes serve as free surfaces and compensation space, and the aim of breaking and throwing rock in a cutting frame is achieved; due to the fact that the depth of the center blasting hole is 20 cm-40 cm larger than the depths of the surrounding peripheral holes, the rock throwing force is strengthened, the rock is completely thrown out, and the cutting effect is improved and guaranteed.
Description
Technical field
The present invention relates to a kind of road or tunnel piercing technique, particularly a kind of road driving Cut Blasting method.
Background technology
The most of underground metal mine of China is Medium and smaller mines, the tunnel overwhelming majority of digging is light section, driving method is shallow bore hole Cut Blasting, because section is little, rock clamping action is large, and aperture, big gun hole is little, disposable blast hole depth is restricted, blast hole utilizing factor is generally in 85%, and 15% big gun hole does not utilize in addition, affects tunneling effect and efficiency.In aperture, the restricted situation of section, the quality of drift excavating blasting effect, the height of blast hole utilizing factor, key depends on the quality of slotting effect; Cut Blasting failure, causes tunneling explosion failure, will affect whole driving circulation and drivage efficiency, causes cost waste.The quality of slotting effect, mainly sees within the scope of slotting frame, whether rock dishes out completely by the degree of depth, the diameter requirement of expection, has created the better empty frame scope of freedom.
Existing underground metal mine light section shallow bore hole driving method is at heading scope of operation center, and five degree of depth of Drilling are identical, perpendicular to the slotting big gun hole of the scope of operation, and big gun hole, center is hollow hole, big gun hole, center surrounding be powder charge hole; Not powder charge of hollow hole, just play the effect of compensation space to other powder charge keyholes, but compensation space is less.When Cut Blasting, the one, owing to being subject to rock clamping action, space is little, and, sometimes there is asphyxia by external pressure on the chest and abdomen phenomenon, and affect demolition effect in the slotting frame of can not being dished out completely of the rock after explosion and crushing; The powder charge hole powder charge of big gun hole, Er Shi center surrounding is more, and cost is higher, but slotting weak effect causes blast hole utilizing factor relatively on the low side, and cut depth is restricted, affects drivage efficiency.
Summary of the invention
The technical problem to be solved in the present invention is to provide a kind of road driving Cut Blasting method, mainly be adapted to light section, small-bore, shallow bore hole gallery (tunnel) driving, be section generally in 20 square metres, aperture below 50 millimeters, the heading parallel, straight slotting of hole depth below 5 meters, to improving slotting successful.
For solving the problems of the technologies described above, technical scheme of the present invention is: a kind of road driving Cut Blasting method, be included in the slotting big gun hole of heading scope of operation center Drilling perpendicular to the scope of operation, and feature of the present invention is:
1. in big gun hole, center perpendicular to the scope of operation of heading scope of operation center Drilling, take the Bao Kongwei center of circle, center, the radius equally distributed 5-8 of Drilling periphery hole on the circumference of 9-12 cm of the scope of operation;
2. center blast hole depth is than the large 20-40cm of the periphery hole degree of depth of surrounding, the deep equality of the periphery hole of surrounding, and the periphery hole of big gun hole, center and surrounding is all parallel to each other;
3. big gun hole in center is powder charge hole, and the periphery hole of surrounding is hollow hole;
4. blast hole charging explosive cartridge in center is with after the detonator being connected with detonator, clogs aperture, stemming length 20-50cm with stemming; When the explosive initiation in big gun hole, center, hollow periphery hole, as the scope of freedom and compensation space, is realized the object of catalase, throwing in slotting frame; The effect of the large 20-40cm of the periphery hole degree of depth of center big gun boring ratio surrounding is to play to strengthen rock throwing strength, and rock is dished out completely, improves and guarantees slotting effect.Described center blast hole depth, preferably than the large 30cm of the periphery hole degree of depth of surrounding.
The invention has the beneficial effects as follows:
1,, when the explosive initiation in center big gun hole, the scope of freedom and the compensation space of the hollow periphery hole of big gun hole, center surrounding are larger, reach the object of catalase, throwing in slotting frame.
2, the large 20-40cm of the periphery hole degree of depth of center big gun boring ratio surrounding, can strengthen slotting frame bottom rock throwing strength, and the rock in slotting frame is dished out completely.
3, a Yi Ge center blast hole charging explosive, clogs aperture with stemming, just can guarantee slotting effect, all loads explosive than the periphery hole in surrounding, saves explosive and produces excavation cost.
Accompanying drawing explanation
Below in conjunction with drawings and Examples, the present invention is further described.
Fig. 1 is process structure schematic diagram of the present invention.
Fig. 2 is the A-A profile of Fig. 1.
The specific embodiment
Embodiment 1 is as shown in Figure 1, 2: a kind of road driving Cut Blasting method, be included in the slotting big gun hole of heading scope of operation center Drilling perpendicular to the scope of operation 3, and it is characterized in that:
1. in big gun hole, center 1 perpendicular to the scope of operation 3 of the heading scope of operation 3 center Drilling, take the big gun hole 1, center of the scope of operation 3 as the center of circle, equally distributed 6 periphery holes 2 of radius Drilling on the circumference of 10 cm;
2. the large 30cm of periphery hole 2 degree of depth of center big gun hole 3 depth ratio surroundings, the deep equality of the periphery hole 2 of surrounding, the periphery hole 2 of big gun hole 1, center and surrounding is all parallel to each other;
3. center big gun hole 1 is powder charge hole, and the periphery hole 2 of surrounding is hollow hole;
4. explosive cartridge 6 is loaded with after the detonator 7 being connected with detonator 4 in center big gun hole 1, clogs aperture, stemming length 30-40cm with stemming 5; While being positioned at the explosive initiation in big gun hole, center 1, hollow periphery hole 2 is larger as the scope of freedom and compensation space, improves slotting effect, reaches the object of catalase, throwing in slotting frame; The large 30cm of periphery hole 2 degree of depth of center big gun boring ratio surrounding, can strengthen slotting frame bottom rock throwing strength, and the rock in slotting frame is dished out completely, guarantees slotting effect.
Claims (2)
1. a road driving Cut Blasting method, is included in the slotting big gun hole of heading scope of operation center Drilling perpendicular to the scope of operation (3), and feature of the present invention is:
1. in big gun hole, center (1) perpendicular to the scope of operation (3) of the heading scope of operation (3) center Drilling, take the big gun hole, center (1) of the scope of operation as the center of circle, the radius equally distributed 5-8 of Drilling periphery hole (2) on the circumference of 9-12 cm;
2. the large 20-40cm of periphery hole (2) degree of depth of center big gun hole (3) depth ratio surrounding, the deep equality of the periphery hole (2) of surrounding, the periphery hole (2) of big gun hole, center (1) and surrounding is all parallel to each other;
3. center big gun hole (1) is powder charge hole, and the periphery hole (2) of surrounding is hollow hole;
4. center big gun hole (1) filling explosive cartridge (6) is with after the detonator (7) being connected with detonator (4), with stemming (5) filling aperture, stemming length 20-50cm; When the explosive initiation in big gun hole, center (1), hollow periphery hole (2), as the scope of freedom and compensation space, is realized the object of catalase, throwing in slotting frame; The effect of the large 20-40cm of periphery hole (2) degree of depth of center big gun boring ratio surrounding is to play to strengthen rock throwing strength, and rock is dished out completely, improves and guarantees slotting effect.
2. a kind of road driving Cut Blasting method according to claim 1, is characterized in that: big gun hole, described center (1) degree of depth, and preferably than the large 30cm of the periphery hole of surrounding (2) degree of depth.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201410124523.7A CN103868420A (en) | 2014-03-31 | 2014-03-31 | Mine gallery driving cut blasting method |
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| CN201410124523.7A CN103868420A (en) | 2014-03-31 | 2014-03-31 | Mine gallery driving cut blasting method |
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| CN103868420A true CN103868420A (en) | 2014-06-18 |
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| CN201410124523.7A Pending CN103868420A (en) | 2014-03-31 | 2014-03-31 | Mine gallery driving cut blasting method |
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Cited By (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN105509585A (en) * | 2016-01-15 | 2016-04-20 | 中国科学技术大学 | Rock-soil blasting method based on tensile stress |
| 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 |
| CN110595306A (en) * | 2019-09-05 | 2019-12-20 | 中国科学技术大学 | Construction method of efficient blasting pile foundation based on principle that external free surface forms tensile wave superposition boundary region |
| CN113776398A (en) * | 2021-08-13 | 2021-12-10 | 安徽金日晟矿业有限责任公司 | Directional control smooth blasting method |
| CN114909962A (en) * | 2022-05-23 | 2022-08-16 | 中铁二十二局集团第三工程有限公司 | Construction method for damping and controlling explosion during tunnel approach construction |
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Cited By (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN105509585A (en) * | 2016-01-15 | 2016-04-20 | 中国科学技术大学 | Rock-soil blasting method based on tensile stress |
| 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 |
| CN110595306A (en) * | 2019-09-05 | 2019-12-20 | 中国科学技术大学 | Construction method of efficient blasting pile foundation based on principle that external free surface forms tensile wave superposition boundary region |
| CN113776398A (en) * | 2021-08-13 | 2021-12-10 | 安徽金日晟矿业有限责任公司 | Directional control smooth blasting method |
| CN114909962A (en) * | 2022-05-23 | 2022-08-16 | 中铁二十二局集团第三工程有限公司 | Construction method for damping and controlling explosion during tunnel approach construction |
| CN114909962B (en) * | 2022-05-23 | 2023-09-08 | 中铁二十二局集团第三工程有限公司 | Construction method for damping and explosion control during tunnel approaching construction |
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Application publication date: 20140618 |