CN104847350A - Method for treating suspended roof by medium-length hole blasting - Google Patents
Method for treating suspended roof by medium-length hole blasting Download PDFInfo
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- CN104847350A CN104847350A CN201510248024.3A CN201510248024A CN104847350A CN 104847350 A CN104847350 A CN 104847350A CN 201510248024 A CN201510248024 A CN 201510248024A CN 104847350 A CN104847350 A CN 104847350A
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- 238000000034 method Methods 0.000 title claims abstract description 34
- 238000005422 blasting Methods 0.000 title claims abstract description 17
- 239000002360 explosive Substances 0.000 claims abstract description 24
- 239000011435 rock Substances 0.000 claims abstract description 8
- 239000000843 powder Substances 0.000 claims description 9
- 230000003245 working effect Effects 0.000 claims description 7
- 238000012856 packing Methods 0.000 claims description 3
- 238000005065 mining Methods 0.000 abstract description 10
- 238000011084 recovery Methods 0.000 abstract description 7
- 239000000725 suspension Substances 0.000 abstract 1
- 239000010878 waste rock Substances 0.000 description 5
- 238000000605 extraction Methods 0.000 description 4
- 238000004519 manufacturing process Methods 0.000 description 4
- 230000011218 segmentation Effects 0.000 description 4
- 230000000694 effects Effects 0.000 description 3
- 230000000977 initiatory effect Effects 0.000 description 3
- 238000007796 conventional method Methods 0.000 description 2
- 238000010586 diagram Methods 0.000 description 2
- 238000004880 explosion Methods 0.000 description 2
- 240000007594 Oryza sativa Species 0.000 description 1
- 235000007164 Oryza sativa Nutrition 0.000 description 1
- 230000009286 beneficial effect Effects 0.000 description 1
- 238000005474 detonation Methods 0.000 description 1
- 238000005516 engineering process Methods 0.000 description 1
- 230000000717 retained effect Effects 0.000 description 1
- 235000009566 rice Nutrition 0.000 description 1
- 239000002699 waste material Substances 0.000 description 1
Classifications
-
- E—FIXED CONSTRUCTIONS
- E21—EARTH OR ROCK DRILLING; MINING
- E21C—MINING OR QUARRYING
- E21C41/00—Methods of underground or surface mining; Layouts therefor
- E21C41/16—Methods of underground mining; Layouts therefor
- E21C41/22—Methods of underground mining; Layouts therefor for ores, e.g. mining placers
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- Engineering & Computer Science (AREA)
- Life Sciences & Earth Sciences (AREA)
- Geochemistry & Mineralogy (AREA)
- Geology (AREA)
- Mining & Mineral Resources (AREA)
- Environmental & Geological Engineering (AREA)
- Remote Sensing (AREA)
- General Life Sciences & Earth Sciences (AREA)
- Drilling And Exploitation, And Mining Machines And Methods (AREA)
Abstract
The invention belongs to the technical field of mining, and particularly relates to a method for treating a suspended roof by medium-length hole blasting. The method comprises the following steps: sequentially arranging a first row, a second row and a third row of deep holes in a top rock stratum of the stoping roadway from a suspended roof region into the stoping roadway, wherein the deep holes in each row are arranged in a fan shape to form a fan-shaped medium-length hole, the row face angle of the first row of medium-length holes is 60 degrees, the row face angle of the second row of deep holes is 70 degrees, the row face angle of the third row of deep holes is 90 degrees, and the deep holes in the first row and the second row extend to the suspended roof region; and filling explosive and a millisecond delay detonating tube into the medium-length hole, and detonating the explosive to collapse the suspension top. Compared with the traditional method, the method has the advantages that the ore loss rate is reduced to 6-9% from 60-70%, the mining recovery rate is improved to 91-94% from 30-40%, the mining recovery rate is greatly improved, and the operation safety is ensured.
Description
Technical field
The invention belongs to mining technical field, be specifically related to a kind of method that top is hanged in medium-length hole blasting process.
Background technology
Sublevel caving, level interval 50 ~ 60 meters, height of lift 10 ~ 12 meters, extracting drift spacing 10 ~ 11 meters, according to height of lift from top to bottom, medium-length hole ore blast mode carries out back production; In ore drawing process, along with the releasing of this segmentation broken ore, upper segmentation waste rock overburden is released thereupon, at the end of ore drawing, is filled with waste rock overburden within the scope of avalanche.Outstanding top is that this sublevel caving height does not reach segmentation position, and non-avalanche part ore deposit rock defines the shape of similar floor, upper segmentation waste rock overburden is cut off, can not a kind of phenomenon in filling avalanche region; Outstanding top is due to medium length blasting design, constructs not in place, and demolition effect is bad to be caused.
After there is outstanding top, traditional method carries out extraction ore deposit under the little barnyard state formed afterwards on outstanding top, collapsing to prevent barnyard top board, ensureing safety in production, overwhelming majority broken ore is retained in little barnyard, can only extraction small part ore, proceed rear row's medium-length hole blasting, ore removal, cause mining loss ratio up to 60 ~ 70%, mining recovery can only reach 30 ~ 40%, not only cause waste but also the barnyard top board instability of resource, there is the possibility collapsing and at any time, safety in production is worked the mischief, Mine Safety in Production needs can not be met.
Summary of the invention
the object of the invention is to provide a kind of medium-length hole blasting process to hang the method on top for prior art Problems existing.
The method on top is hanged in a kind of medium-length hole blasting process, it is characterized in that: in stope drift active workings, set gradually first row, second row, the 3rd row's medium-length hole at the cap rock layer of stope drift active workings by Xuan Ding region, often arranging medium-length hole is that fan-shaped arrangement forms fan shaped medium length hole, first row medium-length hole row angle, face is 60 °, second row medium-length hole row angle, face is 70 °, 3rd row's medium-length hole row angle, face is 90 °, and first row, second row medium-length hole extend to Xuan Ding region; Filling explosive and ms postpone detonator in medium-length hole, ignition charge will hang top avalanche;
Described fan shaped medium length hole should meet following requirements: 50 ~ 60 °, lateral opening angle, hole depth 6 ~ 9 meters, medium-length hole diameter 60 ~ 65 millimeters, adjacent row's medium-length hole lines of orifices is apart from w=0.3 ~ 0.4 meter, with row's medium-length hole bottom hole pitch a=(13 ~ 19) d, close coefficient is 2 ~ 3;
The interlaced setting of adjacent row's medium-length hole;
To the packing method filling with filling explosive employing in row's medium-length hole every, i.e. a medium-length hole powder charge, the not powder charge of adjacent medium-length hole;
Filling explosive in medium-length hole, explosive is by being filled to distance 1.5 ~ 2.3 meters, aperture stopping at the bottom of medium-length hole hole;
Defer time is settled to be that 100 ~ 300ms, section Wei the ms postpone detonators of same section at the bottom of described medium-length hole hole;
In the medium-length hole of described each filling explosive, two ms postpone detonators are set, for subsequent use each other.
The present invention has following beneficial effect:
Medium-length hole of the present invention adopts little bottom hole pitch, island operation slope fan medium-length hole, blasting method adopts the mode that volleys, form presplitting groove after making explosion and push outstanding top bit ore deposit rock to little barnyard, the top waste rock overburden of outstanding top bit is introduced into little barnyard thereupon, reaches normal extraction ore deposit condition; Compared with conventional method, ore deposit loss late drops to 6 ~ 9% by 60 ~ 70%, and mining recovery brings up to 91 ~ 94% by reaching 30 ~ 40%, has increased substantially mining recovery, and ensure that job safety.
Accompanying drawing explanation
Fig. 1 is that medium-length hole of the present invention arranges schematic diagram;
Fig. 2 is the left view of Fig. 1;
Fig. 3 is the top view of Fig. 1;
Fig. 4 is that in medium-length hole, schematic diagram arranged by explosive;
In figure: 1 is stope drift active workings, 2 is Xuan Ding region, and 3 is first row medium-length hole, and 4 is second row medium-length hole, and 5 is the 3rd row's medium-length hole, and 6 for being equipped with the medium-length hole of explosive, and 7 is the medium-length hole of not blasting charge.
Detailed description of the invention
As shown in Figure 1 to Figure 3: in stope drift active workings, set gradually first row medium-length hole 3, second row medium-length hole 4, the 3rd row's medium-length hole 5 at the cap rock layer of stope drift active workings 1 by Xuan Ding region 2, often arranging medium-length hole is that fan-shaped arrangement forms fan shaped medium length hole, the interlaced setting of adjacent row's medium-length hole, it is 60 ° that first row medium-length hole 3 arranges angle, face, it is 70 ° that second row medium-length hole 4 arranges angle, face, it is 90 ° that 3rd row's medium-length hole 5 arranges angle, face, and first row medium-length hole 3, second row medium-length hole 4 extend to Xuan Ding region 2; After medium-length hole is provided with, settle ms postpone detonator, filling explosive in medium-length hole at the bottom of medium-length hole hole, ignition charge will hang top avalanche.
Described fan shaped medium length hole should meet following requirements: 50 ~ 60 °, lateral opening angle, hole depth 6 ~ 9 meters, medium-length hole diameter 60 ~ 65 millimeters, adjacent row's medium-length hole lines of orifices is apart from w=0.3 ~ 0.4 meter, with row's medium-length hole bottom hole pitch a=(13 ~ 19) d, close coefficient is 2 ~ 3.
Above-mentioned pattern has following effect:
1, be conducive to carrying out side direction throwing: row angle, face, is conducive to the little barnyard in Xuan Ding dead ahead and below, outstanding top for carrying out side direction throwing in the scope of freedom to vertical by overbank;
2, to be conducive between Kong Yukong position bottom hole mutually to run through: because bottom hole pitch is less, the crack between explosion hole when and hole is expanded rapidly, to be conducive between Kong Yukong position bottom hole and mutually to run through;
3, be conducive to increasing onepull explosive payload: medium-length hole is intensive, sum is many, total rice number is long, can increase the total charge of onepull.
The packing method of one is filled as shown in Figure 4 every one, i.e. a medium-length hole powder charge, the not powder charge of adjacent medium-length hole to filling explosive employing in fan shaped medium length hole 5; During filling explosive, explosive stops filling by being filled to distance 1.5 ~ 2.3 meters, aperture at the bottom of medium-length hole hole; Two defer times are settled to be that 100 ~ 300ms, section Wei the ms postpone detonators of same section at the bottom of the medium-length hole hole of each filling explosive, for subsequent use each other.
Above-mentioned charging means has following effect:
1, form precracking: after explosive initiation, with the rapid UNICOM in crack formed in the axial direction between row's powder charge medium-length hole and emptying aperture, bottom medium-length hole hole, position forms precracking;
2, presplitting groove is formed; After explosive initiation, between front and rear row powder charge medium-length hole, the rapid UNICOM in crack that formed in radial directions between emptying aperture and emptying aperture, bottom hole, position forms presplitting groove;
3, throwing is forced; All powder charge holes use same section of other elementary errors millisecond detonator, increase the total charge of same section detonator, and the stress wave that detonation gas produces and earthquake intensity of wave increase, and force throwing in Xuan Ding dead ahead and little barnyard the rock mass of outstanding top bit;
4, side direction is beared down on one: after explosive initiation, the explosive energy lateral action of inclination medium-length hole in outstanding rimrock body, with little barnyard and dead ahead for scope of freedom side direction is beared down on one.
Process stope of the present invention outstanding top successful, can push outstanding top bit ore deposit rock to little barnyard, make the top waste rock overburden of outstanding top bit introduce little barnyard from people, reach normal extraction ore deposit condition; Compared with conventional method, ore deposit loss late drops to 6 ~ 9% by 60 ~ 70%, and mining recovery brings up to 91 ~ 94% by reaching 30 ~ 40%, has increased substantially mining recovery, and ensure that job safety.
Claims (7)
1. the method on top is hanged in a medium-length hole blasting process, it is characterized in that: in stope drift active workings, set gradually first row, second row, the 3rd row's medium-length hole at the cap rock layer of stope drift active workings by Xuan Ding region, often arranging medium-length hole is that fan-shaped arrangement forms fan shaped medium length hole, first row medium-length hole row angle, face is 60 °, second row medium-length hole row angle, face is 70 °, 3rd row's medium-length hole row angle, face is 90 °, and first row, second row medium-length hole extend to Xuan Ding region; Filling explosive and ms postpone detonator in medium-length hole, ignition charge will hang top avalanche.
2. the method on top is hanged in a kind of medium-length hole blasting process as claimed in claim 1, it is characterized in that, described fan shaped medium length hole should meet following requirements: 50 ~ 60 °, lateral opening angle, hole depth 6 ~ 9 meters, medium-length hole diameter 60 ~ 65 millimeters, adjacent row's medium-length hole lines of orifices is apart from w=0.3 ~ 0.4 meter, and with row's medium-length hole bottom hole pitch a=(13 ~ 19) d, close coefficient is 2 ~ 3.
3. the method on top is hanged in a kind of medium-length hole blasting process as claimed in claim 1, it is characterized in that: the interlaced setting of adjacent row's medium-length hole.
4. as described in claims 1 to 3 any one, the method on top is hanged in a kind of medium-length hole blasting process, it is characterized in that: to the packing method filling with filling explosive employing in row's medium-length hole every, i.e. a medium-length hole powder charge, the not powder charge of adjacent medium-length hole.
5. as described in claims 1 to 3 any one, the method on top is hanged in a kind of medium-length hole blasting process, it is characterized in that: filling explosive in medium-length hole, and explosive is by being filled to distance 1.5 ~ 2.3 meters, aperture stopping at the bottom of medium-length hole hole.
6. as described in claims 1 to 3 any one, the method on top is hanged in a kind of medium-length hole blasting process, it is characterized in that: settle defer time to be that 100 ~ 300ms, section Wei the ms postpone detonators of same section at the bottom of described medium-length hole hole.
7. as described in claims 1 to 3 any one, the method on top is hanged in a kind of medium-length hole blasting process, it is characterized in that: arrange two ms postpone detonators in the medium-length hole of described each filling explosive, for subsequent use each other.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201510248024.3A CN104847350A (en) | 2015-05-15 | 2015-05-15 | Method for treating suspended roof by medium-length hole blasting |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201510248024.3A CN104847350A (en) | 2015-05-15 | 2015-05-15 | Method for treating suspended roof by medium-length hole blasting |
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| CN104847350A true CN104847350A (en) | 2015-08-19 |
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| CN201510248024.3A Pending CN104847350A (en) | 2015-05-15 | 2015-05-15 | Method for treating suspended roof by medium-length hole blasting |
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Cited By (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN105841563A (en) * | 2016-04-21 | 2016-08-10 | 西北矿冶研究院 | Medium-length hole blasting method capable of realizing funnel one-time well completion and leakage expansion |
| CN108843317A (en) * | 2018-05-31 | 2018-11-20 | 西北矿冶研究院 | Mining quality accident handling method |
| CN109974545A (en) * | 2019-04-04 | 2019-07-05 | 中南大学 | A kind of medium-length hole blasting outstanding top processing method in sublevel caving method |
| CN111578797A (en) * | 2020-07-06 | 2020-08-25 | 酒泉钢铁(集团)有限责任公司 | Underground medium-length hole blasting suspended roof processing method |
| CN112857162A (en) * | 2020-12-31 | 2021-05-28 | 中国华冶科工集团有限公司 | Mine blast hole time-delay blasting method |
| CN115199275A (en) * | 2022-08-09 | 2022-10-18 | 甘肃镜铁山矿业有限公司 | Method for treating suspended roof by using geological drilling |
-
2015
- 2015-05-15 CN CN201510248024.3A patent/CN104847350A/en active Pending
Non-Patent Citations (1)
| Title |
|---|
| 周斌: "中深孔采矿爆破悬顶问题的探讨", 《铜业工程》 * |
Cited By (8)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN105841563A (en) * | 2016-04-21 | 2016-08-10 | 西北矿冶研究院 | Medium-length hole blasting method capable of realizing funnel one-time well completion and leakage expansion |
| CN108843317A (en) * | 2018-05-31 | 2018-11-20 | 西北矿冶研究院 | Mining quality accident handling method |
| CN109974545A (en) * | 2019-04-04 | 2019-07-05 | 中南大学 | A kind of medium-length hole blasting outstanding top processing method in sublevel caving method |
| CN109974545B (en) * | 2019-04-04 | 2020-05-19 | 中南大学 | Medium-length hole blasting suspended roof processing method in sublevel caving method |
| CN111578797A (en) * | 2020-07-06 | 2020-08-25 | 酒泉钢铁(集团)有限责任公司 | Underground medium-length hole blasting suspended roof processing method |
| CN111578797B (en) * | 2020-07-06 | 2022-05-31 | 酒泉钢铁(集团)有限责任公司 | Underground medium-length hole blasting suspended roof processing method |
| CN112857162A (en) * | 2020-12-31 | 2021-05-28 | 中国华冶科工集团有限公司 | Mine blast hole time-delay blasting method |
| CN115199275A (en) * | 2022-08-09 | 2022-10-18 | 甘肃镜铁山矿业有限公司 | Method for treating suspended roof by using geological drilling |
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Application publication date: 20150819 |