CN1331378A - Shooting breakdown method for blast mining face in coal mine - Google Patents
Shooting breakdown method for blast mining face in coal mine Download PDFInfo
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- CN1331378A CN1331378A CN 00112369 CN00112369A CN1331378A CN 1331378 A CN1331378 A CN 1331378A CN 00112369 CN00112369 CN 00112369 CN 00112369 A CN00112369 A CN 00112369A CN 1331378 A CN1331378 A CN 1331378A
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- shooting
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- mining face
- coal mine
- breakdown method
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Abstract
A shooting breakdown method for the blast mining face in coal mine features that the holes are drilled at intervals on different gravitalionally vertical lines segment by segment, the explosive charge, the number of holes and the interval can be regulated according to the actual condition, and at least two segments are detonated. Its advantages are high coal block percentage (50% or more), and high safety.
Description
The present invention relates to a kind of shooting breakdown method for blast mining face in coal mine, be particularly useful for the blast mining face in large, medium and small moulded coal ore deposit, also be applicable to the mine blast mining face.
The long-term shooting breakdown method that uses of blast mining face in coal mine mainly is that promptly the borehole punch position is staggeredly arranged with " five presbyopia " and " three presbyopia " arrangement, is in four one or 3 patterns of triangle.Creeping into of hole is the right angle, adopt instantaneous cap, divide tens coal breakages that detonate, it is more that its result causes coal breakage to collapse coal quantity in the old man, it is big to hovel coal labour intensity from one place to another, and the coal lump coal rate of institute's extraction is low, and calculating by the mining face under mine actual production only has about 25%, influence the mine economic benefit greatly, and caused the waste of human and material resources and efficient.
The purpose of this invention is to provide and a kind ofly can improve lump coal rate, reduce the coal amount of hoveling from one place to another, reduce labour intensity and save the shooting breakdown method for blast mining face in coal mine of the time of blowing out.
A kind of shooting breakdown method for blast mining face in coal mine of the present invention, the equidistant arrangement of the perpendicular row of horizontally-arranged segmentation punching on the same gravity vertical line of coal-face, all creep into by the α angle in each hole, and with 1～5 section millisecond detonator, explosive consumption is installed by the different amounts with millisecond detonator in each hole site.At least two sections combinations of at every turn detonating, dividing segment distance is 5～10 meters, and the angle α that creeps into the hole is 30 °～85 °, and explosive payload is 100G～400G.
A kind of shooting breakdown method for blast mining face in coal mine of the present invention, be best suited for big, in, the blast mining face of small-size coal mine, hardness and stability of cavern roof situation according to the coal seam, the equidistant arrangement of the perpendicular row of horizontally-arranged segmentation punching on the same gravity vertical line of coal-face, creep into by certain angle in each hole, explosive consumption, big gun hole number and spacing, determine by actual conditions, can adjust accordingly, detonate two sections more than the combination at every turn, the coal seam is shelled nation successively and is detonated, the coal of producing contains the piece rate and reaches more than 50%, and significantly reduce to the old man and collapse the coal amount, improved effect, reduce destructiveness to top board, improved safety factor, ram the loose soil with a stone-roller after sowing coal and calculate whenever to adopt 100,000, but net increase take in more than 1,000,000 yuan, this method is with a wide range of applications.
Description of drawings:
Fig. 1 is that work plane borehole of the present invention is arranged schematic diagram.
Fig. 2 is a work plane borehole angle schematic diagram of the present invention.
Below in conjunction with accompanying drawing one embodiment of the present of invention are described further:
A kind of shooting breakdown method for blast mining face in coal mine of the present invention, on coal-face, the perpendicular row of segmentation horizontally-arranged are equidistant arranges punching, and the α angle that creeps in each hole is selected 60 ° for use, and drilling depth is looked coal seam thickness and is come surely, is generally 1～1.3 meter.The distance of segmentation selects for use 8 meters to be one section, and every section is provided with punching 10 row, whenever classifies 3 rounds as, (as shown in Figure 1: A, B, C, 3 rounds).On every section 10 row hole is represented with 1,2,3,4,5,5,4,3,2,1, is expressed as first row: A
1, A
2A
5A
5... A
2, A
1, other two rows B, C hole roughly the same, dividing the angle in 5 holes is a direction, distance is determined according to the relative position of angle between the angle in relative or opposite both direction hole, as shown in Figure 2.Ignite with 1～5 section millisecond detonator, explosive consumption is installed by the different amounts with millisecond detonator in each hole site respectively, and explosive payload is that 100G～400G does not wait.At least two sections combinations of at every turn detonating, the coal seam is shelled nation successively and is detonated.
Claims (3)
1. shooting breakdown method for blast mining face in coal mine, it is characterized in that: the equidistant arrangement of the perpendicular row of horizontally-arranged segmentation punching on the same gravity vertical line of coal-face, all creep into by the α angle in each hole, with 1～5 section millisecond detonator, explosive consumption is installed at least two sections combinations of at every turn detonating by the different amounts with millisecond detonator in each hole site.
2. a kind of shooting breakdown method for blast mining face in coal mine according to claim 1 is characterized in that: segment distance was set to 5～10 meters in described minute.
3. a kind of shooting breakdown method for blast mining face in coal mine according to claim 1 and 2 is characterized in that: the angle α that creeps into the hole is 30 °～85 °.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 00112369 CN1331378A (en) | 2000-06-28 | 2000-06-28 | Shooting breakdown method for blast mining face in coal mine |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 00112369 CN1331378A (en) | 2000-06-28 | 2000-06-28 | Shooting breakdown method for blast mining face in coal mine |
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| Publication Number | Publication Date |
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| CN1331378A true CN1331378A (en) | 2002-01-16 |
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| CN 00112369 Pending CN1331378A (en) | 2000-06-28 | 2000-06-28 | Shooting breakdown method for blast mining face in coal mine |
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Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102359378A (en) * | 2011-09-23 | 2012-02-22 | 丁干家 | Coal blasting production method increasing lump coat rate |
| CN103089265A (en) * | 2011-11-04 | 2013-05-08 | 贵州开磷（集团）有限责任公司 | Middle-deep hole blasting ore breaking method for underground mining |
| CN106499394A (en) * | 2016-11-16 | 2017-03-15 | 山东鲁泰控股集团有限公司 | A kind of machine gun is closed adopts the coal winning technology for improving lump coal rate |
| CN108506001A (en) * | 2018-03-27 | 2018-09-07 | 兖矿集团有限公司 | A kind of efficient method for improving hypotonicity coal seam lump coal rate |
-
2000
- 2000-06-28 CN CN 00112369 patent/CN1331378A/en active Pending
Cited By (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102359378A (en) * | 2011-09-23 | 2012-02-22 | 丁干家 | Coal blasting production method increasing lump coat rate |
| CN103089265A (en) * | 2011-11-04 | 2013-05-08 | 贵州开磷（集团）有限责任公司 | Middle-deep hole blasting ore breaking method for underground mining |
| CN103089265B (en) * | 2011-11-04 | 2014-12-31 | 贵州开磷（集团）有限责任公司 | Middle-deep hole blasting ore breaking method for underground mining |
| CN106499394A (en) * | 2016-11-16 | 2017-03-15 | 山东鲁泰控股集团有限公司 | A kind of machine gun is closed adopts the coal winning technology for improving lump coal rate |
| CN108506001A (en) * | 2018-03-27 | 2018-09-07 | 兖矿集团有限公司 | A kind of efficient method for improving hypotonicity coal seam lump coal rate |
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| C02 | Deemed withdrawal of patent application after publication (patent law 2001) | ||
| WD01 | Invention patent application deemed withdrawn after publication |