CN214666419U - Deep hole differential extrusion blasting structure for improving long-meter blasting amount of surface mine - Google Patents
Deep hole differential extrusion blasting structure for improving long-meter blasting amount of surface mine Download PDFInfo
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- CN214666419U CN214666419U CN202120585976.5U CN202120585976U CN214666419U CN 214666419 U CN214666419 U CN 214666419U CN 202120585976 U CN202120585976 U CN 202120585976U CN 214666419 U CN214666419 U CN 214666419U
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Abstract
The utility model provides a surface mine improves deep hole discrepancy extrusion blasting structure of long rice blasting volume, including blasting the region, the blasting region is the step inclined plane, the blasting region is provided with the multirow big gun hole, the multirow big gun hole is arranged for the step along blasting the region, is filled with blasting powder in its big gun hole, distance between big gun hole and the big gun hole is a, every row of big gun hole is b with the row distance of every row of big gun hole, wherein, a b =29 ~ 30.8, m = a/b, and the m value is between 0.8 ~ 1.4, and when big gun hole diameter, and ore rock fastening coefficient are fixed time, through optimizing the distance of adjustment hole distance and row distance, reach the optimal value of hole row distance through calculation, blasting test, adjustment, optimize reasonable row distance promptly, reach the most economical blasting effect.
Description
Technical Field
The utility model belongs to the technical field of open-pit mining medium-length hole blasting, provide a surface mine improves the deep hole differential extrusion blasting structure of long rice blasting volume under the prerequisite of ensureing the blasting effect.
Background
Blasting is a crucial production process link for surface mining, and a horizontal parallel propelling method of top-down step mining is mostly adopted. The quality of the blasting effect not only influences whether production organization can be carried out efficiently, but also determines the height of each technical and economic index of mining, and finally influences the whole production and operation cost.
With the progress of blasting technology, the reasonable and controllable blasting technical parameters have higher safety and better economic benefit for mine production. The blasting effect can be improved by optimizing the blasting parameters, the unit consumption of explosive is reduced, the economic benefit is improved, and the medium-length hole blasting parameters of the surface mine comprise: the factors of hole distance, row spacing, ultra-depth, resistance line, aperture, filling depth and the like, and when the diameter of a blast hole and the fastening coefficient of ore rock are fixed, how to determine blasting parameters is particularly critical to achieve the most economical blasting effect.
SUMMERY OF THE UTILITY MODEL
The utility model aims at providing a surface mine improves deep hole discrepancy extrusion blasting structure of long rice blasting volume, when big gun hole diameter and ore deposit rock fastening coefficient are fixed time, through optimizing the distance of adjustment pitch-row and pitch-row, reaches the optimal value of hole pitch-row through calculation, blasting test, adjustment, optimizes reasonable hole pitch-row promptly, reaches the blasting effect of economy most.
In order to achieve the above object, the utility model discloses a technical scheme be: the deep hole differential extrusion blasting structure for improving the extended-length blasting amount of the surface mine comprises a blasting area, wherein the blasting area is a step-type inclined plane, a plurality of rows of blast holes are arranged in the blasting area in a step-type mode, blasting powder is filled in the blast holes, the distance between the blast holes is a, the row distance between each row of blast holes and each row of blast holes is b, wherein a + b = 29-30.8, m = a/b, and the m value is 0.8-1.4.
The further improvement is that the step height is 12-15 meters.
In a further improvement, the shape of the blast hole is a diamond shape or a square shape or a rectangle shape.
Compared with the prior art, the method has the following advantages:
(1) when the diameter of the blast hole and the height of the step are fixed, the loading of the original single hole is constant, and the filling length is constant, so that the single hole blasting area is increased, namely the single hole blasting amount is increased (linear meter blasting amount). The method has the advantages of reducing the unit consumption of explosive, saving the blasting cost, reducing the perforation cost, reducing the whole perforation quantity, reducing the explosion avoiding time and favorably ensuring the influence of the blasting operation on the production.
(2) The blasting frequency is reduced, the generation of root bottoms between every two blast blasting stubble joints is avoided, the blasting effect is favorably improved, and the stope flatness is improved. The oil consumption and the treatment cost of the secondary shovel are reduced.
(3) The method is favorable for maintaining the stability of the side slope, reduces the blasting frequency compared with the original blasting frequency, avoids the frequent disturbance of blasting vibration on the buffer surface of the side slope, reduces the rock fall and reduces the safety risk of the side slope.
Drawings
Fig. 1 is the structure diagram of the step mesh arrangement of the open pit mine.
Detailed Description
The following describes the optimized specific technical solution with reference to the accompanying drawings and the specific embodiments:
as shown in fig. 1, a deep hole differential extrusion blasting structure for improving extended-length blasting amount of a surface mine comprises a blasting area 1, wherein the blasting area 1 is a stepped slope, multiple rows of blast holes are arranged in the blasting area, the blast holes are filled with blasting powder, the distance between the blast holes is a, and the row distance between each row of blast holes and each row of blast holes is b, wherein a = 29-30.8, m = a/b, m is 0.8-1.4, the step height is 12-15 m, and the blast holes are diamond-shaped or square-shaped or rectangular.
Taking deep hole blasting of limestone mine of Jidong Heidelberg (Jingyang) cement Limited as an example, the original blasting hole grid parameters of the mine are 6m in blast hole spacing and 5m in row spacing. The distance between blast holes is 7m and the row spacing is 4.5m after optimization. The charges in the blast holes are all porous ammonium nitrate fuel oil explosives, and the electronic millisecond electric detonator is used for deep-hole millisecond extrusion blasting. The single-hole long rice increases the blasting amount by about 60 tons, increases the blasting ore amount by about 24-25.2 ten thousand tons all the year round, and saves the blasting cost by about 53.7 ten thousand yuan.
The specific process comprises the following steps:
1. calculating and determining the parameters of the mesh: and (3) determining the pore network parameters by combining the property of the open-air limestone ore and the rock mass structure, the limestone firmness coefficient f = 6-8 and other analysis through the formula and the calculation of the pore network density coefficient: reject 4.5m, pitch 7 m.
2. Arranging blast holes: the height of the step is 15m, the inclination angle of the blast holes is 90 degrees, the diameter of the blast holes is 152mm, the normal blast holes are 2m deep, the blast holes are arranged to exclude 4.5m, the hole spacing is 7m, and each row of holes are arranged according to a quincunx pattern and are vertically punched.
3. Charging in blast holes: and (3) continuously coupling and charging the porous ammonium nitrate fuel oil explosives from bottom to top in the blast holes of the platform, wherein the charging height is 12 m.
4. And (3) detonating the explosive charges by adopting double-shot electronic millisecond electric detonators, wherein one detonator is positioned at the position 1-2m away from the bottom of the hole, and the other detonator is positioned in the middle of the explosive charging column. The two initiating explosive charges are both 2kg of emulsion explosive with the diameter of 70 mm.
The length of the electronic millisecond electric detonator leg wire is 15 meters, and a detonator leg wire with the length of 8-9 meters is reserved in the orifice of the ground surface, so that ground surface connection is facilitated.
4. Packing length: the top of the powder charging blast hole is 5m in height, and the blast hole is filled and blocked by adopting the perforation rock slag and the stone powder, and the blocking height is 5 m.
5. According to the requirement of an initiation network in blasting design instruction, blast holes are connected, initiation is carried out in sequence among rows, and the interval delay requirement is not more than 50 ms.
Claims (3)
1. The deep hole differential extrusion blasting structure for improving the extended-length blasting amount of the surface mine comprises a blasting area, wherein the blasting area is a step-type inclined surface, and is characterized in that a plurality of rows of blast holes are arranged in the blasting area, the plurality of rows of blast holes are arranged in a step-type manner along the blasting area, blasting powder is filled in the blast holes, the distance between each blast hole and each blast hole is a, the row distance between each row of blast holes and each row of blast holes is b, wherein a b = 29-30.8, m = a/b, and the m value is 0.8-1.4.
2. The deep hole micro-differential extrusion blasting structure for increasing the amount of long-run blasting in a surface mine according to claim 1, wherein the step height is 12-15 m.
3. The deep hole differential extrusion blasting structure for improving the amount of longmeter blasting in a surface mine according to claim 1, wherein the shape of the blasthole is rhombus, square or rectangle.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202120585976.5U CN214666419U (en) | 2021-03-23 | 2021-03-23 | Deep hole differential extrusion blasting structure for improving long-meter blasting amount of surface mine |
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| Application Number | Priority Date | Filing Date | Title |
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| CN202120585976.5U CN214666419U (en) | 2021-03-23 | 2021-03-23 | Deep hole differential extrusion blasting structure for improving long-meter blasting amount of surface mine |
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| CN214666419U true CN214666419U (en) | 2021-11-09 |
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| CN202120585976.5U Active CN214666419U (en) | 2021-03-23 | 2021-03-23 | Deep hole differential extrusion blasting structure for improving long-meter blasting amount of surface mine |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN115451764A (en) * | 2022-09-23 | 2022-12-09 | 河北钢铁集团矿业有限公司 | Open blasting method |
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2021
- 2021-03-23 CN CN202120585976.5U patent/CN214666419U/en active Active
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN115451764A (en) * | 2022-09-23 | 2022-12-09 | 河北钢铁集团矿业有限公司 | Open blasting method |
| CN115451764B (en) * | 2022-09-23 | 2023-08-22 | 河北钢铁集团矿业有限公司 | Surface blasting method |
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