CN112031771A - Groove cutting and pulling method for safe construction - Google Patents
Groove cutting and pulling method for safe construction Download PDFInfo
- Publication number
- CN112031771A CN112031771A CN202010988078.4A CN202010988078A CN112031771A CN 112031771 A CN112031771 A CN 112031771A CN 202010988078 A CN202010988078 A CN 202010988078A CN 112031771 A CN112031771 A CN 112031771A
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- cutting
- groove
- roof
- raise
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- E—FIXED CONSTRUCTIONS
- E21—EARTH DRILLING; MINING
- E21C—MINING OR QUARRYING
- E21C41/00—Methods of underground or surface mining; Layouts therefor
- E21C41/16—Methods of underground mining; Layouts therefor
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F42—AMMUNITION; BLASTING
- F42D—BLASTING
- F42D1/00—Blasting methods or apparatus, e.g. loading or tamping
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F42—AMMUNITION; BLASTING
- F42D—BLASTING
- F42D3/00—Particular applications of blasting techniques
- F42D3/04—Particular applications of blasting techniques for rock blasting
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- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02P—CLIMATE CHANGE MITIGATION TECHNOLOGIES IN THE PRODUCTION OR PROCESSING OF GOODS
- Y02P70/00—Climate change mitigation technologies in the production process for final industrial or consumer products
- Y02P70/10—Greenhouse gas [GHG] capture, material saving, heat recovery or other energy efficient measures, e.g. motor control, characterised by manufacturing processes, e.g. for rolling metal or metal working
Abstract
The invention relates to the technical field of mining blasting, in particular to a cutting groove broaching method with safe construction. The vertical downward hole and the upward fan-shaped hole are adopted for mining, so that the mining efficiency is improved, the lumpiness is uniform, the block rate is low, the ore removal efficiency is high, and the period is shortened. The method is suitable for thick, slowly-inclined and inclined ore bodies, reduces the mining and cutting engineering quantity, saves the cost, and simultaneously improves the safety of a stope. Compared with the shallow hole shrinkage method, manual raise construction, three-center five-hole medium-length hole and other processes, the mining process is optimized. The problems of severe operation environment, high labor intensity, low efficiency and long period of the conventional cutting groove and pull groove are solved.
Description
Technical Field
The invention relates to the technical field of mining blasting, in particular to a groove cutting and pulling method for safe construction.
Background
The cutting groove is the most critical process for the whole stoping and stope mining, and the stoping of the cutting groove is an important link of a staged and sectioned open stope mining method. The cutting groove provides a larger compensation space and a free surface for stope blasting. The method aims at solving the problems of severe operation environment, high labor intensity, low efficiency and long period of the existing cutting groove drawing groove of mines such as a manual construction raise, a manual shallow mining shallow hole shrinkage method and a three-center five-hole medium-length hole drawing groove method.
Disclosure of Invention
Aiming at the problems, the invention provides a cutting groove broaching method with safe construction.
The technical scheme is that the safe construction method for cutting the groove and pulling the groove comprises vertical downward hole blasting and upward sector hole blasting of the roof cutting chamber.
Further, the roof cutting chamber blasting vertically downwards, comprising the following steps:
s1, arranging trenches, and arranging the trenches on the footwall of the ore body along the trend of the ore body;
s2, arranging a roof cutting chamber on the ore body along the inclination of the ore body;
s3, arranging a cutting raise, and arranging the cutting raise between the roof cutting chamber and the trench;
s4, arranging a cutting well, polishing the cutting raise by a raise boring machine around the cutting raise, and after the mine is emptied, cutting the raise and grinding the cutting raise to expand the well to be the cutting well;
and S5, charging the chute, and blasting the chute in the vertical downward hole to form a gob taking the cross section of the roof cutting chamber as the width.
Furthermore, the depth of the downward hole is 50-60 m.
Optionally, the diameter of the cutting raise is 1.4 m.
Optionally, in S4, a raise boring machine is used to drill a mill cutting raise with a diameter of 1.5m at a position 1m around the cutting raise, and the well is finally expanded into a cutting well with a plane cross section of 5m × 3m after the mine is emptied.
Optionally, in S5, downward holes are drilled on both sides of the roof cutting chamber where the roof cutting chamber communication passage enters.
Optionally, in S5, after the explosive charging slot-drawing blasting, the goaf is a V-shaped slot.
Further, the upward sector hole blasting comprises the following steps:
s1, arranging trenches, and arranging the trenches on the footwall of the ore body along the trend of the ore body;
s2, arranging a roof cutting chamber on the ore body along the inclination of the ore body;
s3, arranging a cutting raise, and arranging the cutting raise between the roof cutting chamber and the trench;
s4, setting an upward sector hole, entering the top cutting chamber from the top cutting chamber connecting channel, and drilling the top cutting chamber to the boundary of an upper plate of an ore body along a cutting ceiling to obtain the upward sector hole;
and S5, charging a pulling groove, and charging the pulling groove in the upward fan-shaped hole to form a gob taking the cross section of the roof cutting chamber as the width.
Optionally, the upward sector hole blasting is later than the vertical downward hole blasting.
The beneficial effects of the invention at least comprise one of the following;
1. the method is suitable for thick, slowly-inclined and inclined ore bodies, reduces the mining and cutting engineering quantity, saves the cost, and simultaneously improves the safety of a stope. Compared with the shallow hole shrinkage method, manual raise construction, three-center five-hole medium-length hole and other processes, the mining process is optimized.
2. The vertical downward hole arrangement and the upward fan-shaped hole arrangement of the roof cutting chamber are adopted, so that the accuracy of blast holes is improved, the hole depth controls the boundary, the cutting groove is easy to form, the forming effect is good, the unit consumption of explosive is reduced, and dilution is reduced.
3. The vertical downward hole and the upward fan-shaped hole are adopted for mining, so that the mining efficiency is improved, the lumpiness is uniform, the block rate is low, the ore removal efficiency is high, and the period is shortened.
4. The problems of severe operation environment, high labor intensity, low efficiency and long period of the conventional cutting groove and pull groove are solved.
Drawings
FIG. 1 is a schematic plan view of an underground mining cutting groove;
FIG. 2 is a cross-sectional view of an underground mining cutting groove;
labeled as: 1 is a cutting raise, 2 is a top cutting chamber, 3 is a top cutting chamber communicating channel, 4 is a chamber strip column, 5 is a downward hole, 6 is a trench, 7 is an ore removal route, 8 is a mining main line, 9 is a cutting well, and 10 is an upward fan-shaped hole.
Detailed Description
In order to make the objects, technical solutions and advantages of the present invention more clearly apparent, the present invention will be described in further detail with reference to the accompanying drawings and examples. It should be understood that the specific embodiments described herein are merely illustrative of the invention and are not intended to limit the scope of the invention.
As shown in fig. 1 and 2, a method for safely cutting and drawing a slot in a cutting groove for construction includes a vertical downward hole blasting and an upward fan hole blasting of a roof cutting chamber.
Wherein the vertical downward hole blasting of chamber of cutting the top includes the following steps:
s1, arranging trenches, and arranging trenches 6 on the footwall of the ore body along the trend of the ore body;
s2, arranging a roof cutting chamber, and arranging a roof cutting chamber 2 on the ore body along the inclination of the ore body;
s3, arranging a cutting raise, and arranging a cutting raise 1 between the roof cutting chamber 2 and the trench 6;
s4, arranging a cutting well, polishing the cutting raise by using a raise boring machine around the cutting raise 1, and after the mine is emptied, cutting the raise 1 and polishing the cutting raise to expand the well to be a cutting well 9;
and S5, loading explosive drawing grooves, and blasting the explosive drawing grooves in the vertical downward hole 5 to form a gob taking the cross section of the roof cutting chamber 2 as the width.
Wherein, the upward sector hole blasting comprises the following steps:
s1, arranging trenches, and arranging trenches 6 on the footwall of the ore body along the trend of the ore body;
s2, arranging a roof cutting chamber, and arranging a roof cutting chamber 2 on the ore body along the inclination of the ore body;
s3, arranging a cutting raise, and arranging a cutting raise 1 between the roof cutting chamber 2 and the trench 6; s4, arranging an upward sector hole, entering the roof cutting chamber 2 from the roof cutting chamber connecting channel 3, and drilling the roof cutting chamber 2 to the boundary of an upper plate of an ore body along the cutting raise 1 to obtain an upward sector hole 10;
s5, filling powder drawing grooves, filling the powder drawing grooves in the upward fan-shaped holes 10 to form a gob taking the cross section of the roof cutting chamber 2 as the width.
The design aims to improve the accuracy of blast holes and control the boundary of hole depth by adopting the arrangement of vertical downward holes and upward fan-shaped holes of the roof cutting chamber, the cutting groove is easy to form, the forming effect is good, the unit consumption of explosive is reduced, and dilution is reduced. The vertical downward hole and the upward fan-shaped hole are adopted for mining, so that the mining efficiency is improved, the lumpiness is uniform, the block rate is low, the ore removal efficiency is high, and the period is shortened. The method is suitable for thick, slowly-inclined and inclined ore bodies, reduces the mining and cutting engineering quantity, saves the cost, and simultaneously improves the safety of a stope. Compared with the shallow hole shrinkage method, manual raise construction, three-center five-hole medium-length hole and other processes, the mining process is optimized. The problems of severe operation environment, high labor intensity, low efficiency and long period of the conventional cutting groove and pull groove are solved.
In the specific implementation, the depth of the downward hole 5 is 50-60 m, and the downward hole is arranged deeper when a vertical downward hole is adopted for mining thick ore bodies, so that a sectional rock drilling roadway is reduced, and the mining and cutting engineering quantity is obviously less.
Meanwhile, the diameter of the cutting raise 1 is 1.4m, a milling cutting raise with the diameter of 1.5m is drilled at the position of 1m on the periphery of the cutting raise 1 by a raise boring machine, and finally the well is expanded into a cutting well 9 with the plane section of 5m multiplied by 3m after the ore is removed.
The well drilling machine is used for drilling and cutting the well, the utilization rate of the existing rock drilling equipment is increased, the safety is high, the overall rock drilling efficiency is improved, the mechanization is realized, the efficiency is high, and the labor productivity is improved.
In construction, the specification of the roof cutting chamber 2 is selected according to the requirements of down-hole equipment in construction, the minimum distance from the retaining wall side is 0.6m in common construction, and the minimum distance of the roadway height is 3.3m, so the specification of the roof cutting chamber 2 is 5m multiplied by 3.3 m.
And after the top cutting chamber is blasted vertically downwards, blasting ore removal is carried out to form a V-shaped groove. And (3) punching holes at two sides of the inclined cutting well, wherein the distance between the rows of the slotted holes is 2m, the distance between the holes is 2.5-3.0 m, and the holes are drilled downwards and each row of the holes exceeds the V-shaped trench boundary by 0.5m, so that the boundary control effect is achieved.
Different from the cutting well manufactured by expanding the well through a raise boring machine, after the blasting of the vertical downward hole of the roof cutting chamber is completed, a cutting raise is constructed in the middle of the V-shaped groove, and finally the well is expanded to form the cutting well which is used as a blasting direction and compensation space of the cutting groove. The first blasting direction of the groove drawing groove cannot be lower than 20%, the compensation ratio cannot be lower than 30%, and the whole cutting groove can be blasted for multiple times.
And simultaneously, when the roof cutting chamber drills a vertical downward hole, upward sector holes are synchronously arranged, and after a rock drilling and charging connecting line is finished, row-by-row detonation is carried out, and the upward sector hole blasting is delayed from the downward hole blasting.
And forming strip columns 4 between chambers between adjacent roof-cutting chambers 2, wherein the width of the strip column between chambers is 3-5 m, and downward vertical deep holes are drilled in the adjacent roof-cutting chambers, so that the roof-cutting chamber is inclined upwards by taking the cutting groove gob as a compensation space.
Claims (9)
1. A groove drawing method for cutting grooves safely in construction is characterized in that: comprises the vertical downward hole blasting and the upward fan-shaped hole blasting of the roof cutting chamber.
2. The method for making the cutting groove and the pulling groove safely for construction according to claim 1, wherein the method comprises the following steps: the roof cutting chamber blasting vertically downwards, comprising the following steps:
s1, arranging trenches, and arranging trenches (6) on the footwall of the ore body along the trend of the ore body;
s2, arranging a roof cutting chamber, and arranging a roof cutting chamber (2) on the ore body along the inclination of the ore body;
s3, arranging a cutting raise, and arranging a cutting raise (1) between the roof cutting chamber (2) and the trench (6);
s4, arranging a cutting well, polishing the cutting raise by using a raise boring machine around the cutting raise (1), and after the mine is emptied, expanding the cutting raise (1) and the grinding cutting raise to be a cutting well (9);
and S5, loading explosive drawing grooves, and blasting the explosive drawing grooves in the vertical downward hole (5) to form a gob taking the cross section of the roof cutting chamber (2) as the width.
3. The method for making the cutting groove and the groove pulling safely for construction according to claim 2, is characterized in that: the depth of the downward hole (5) is 50-60 m.
4. The method for making the cutting groove and the groove pulling safely for construction according to claim 2, is characterized in that: the diameter of the cutting raise (1) is 1.4 m.
5. The method for making the cutting groove and the pulling groove safely for construction according to claim 4, wherein the method comprises the following steps: and S4, drilling a ground cutting raise with the diameter of 1.5m at a position 1m away from the periphery of the cutting raise (1) by using a raise boring machine, and finally expanding the cut raise to form a cut well (9) with the plane section of 5m multiplied by 3m after the ore is emptied.
6. The method for making the cutting groove and the pulling groove safely for construction according to claim 4, wherein the method comprises the following steps: in S5, downward holes (5) are drilled on two sides of the roof-cutting chamber (2) where the roof-cutting chamber connecting channel (3) enters.
7. The method for making the cutting groove and the pulling groove safely for construction according to claim 4, wherein the method comprises the following steps: and in S5, after the explosive charging and groove pulling blasting, the goaf is a V-shaped groove.
8. The method for making the cutting groove and the pulling groove safely for construction according to claim 1, wherein the method comprises the following steps: the upward sector hole blasting comprises the following steps:
s1, arranging trenches, and arranging trenches (6) on the footwall of the ore body along the trend of the ore body;
s2, arranging a roof cutting chamber, and arranging a roof cutting chamber (2) on the ore body along the inclination of the ore body;
s3, arranging a cutting raise, and arranging a cutting raise (1) between the roof cutting chamber (2) and the trench (6);
s4, arranging upward sector holes, entering the roof-cutting chamber (2) from the roof-cutting chamber connecting channel (3), and drilling the roof-cutting chamber (2) to the boundary of the upper plate of the ore body along the cutting raise (1) to obtain upward sector holes (10);
s5, filling a powder pull groove, and filling the powder pull groove in the upward fan-shaped hole (10) to form a gob taking the cross section of the roof cutting chamber (2) as the width.
9. The method for making the cutting groove and the pulling groove safely for construction according to claim 8, wherein: and the upward sector hole blasting is later than the vertical downward hole blasting of the roof cutting chamber.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202010988078.4A CN112031771B (en) | 2020-09-18 | 2020-09-18 | Cutting groove pulling method with safe construction |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202010988078.4A CN112031771B (en) | 2020-09-18 | 2020-09-18 | Cutting groove pulling method with safe construction |
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| CN112031771A true CN112031771A (en) | 2020-12-04 |
| CN112031771B CN112031771B (en) | 2023-06-06 |
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| CN202010988078.4A Active CN112031771B (en) | 2020-09-18 | 2020-09-18 | Cutting groove pulling method with safe construction |
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Cited By (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN112523753A (en) * | 2020-12-17 | 2021-03-19 | 铜陵有色金属集团铜冠矿山建设股份有限公司 | Method for effectively improving one-time mining height of mine |
| CN112963147A (en) * | 2021-03-17 | 2021-06-15 | 内蒙古包头鑫达黄金矿业有限责任公司 | Medium-length hole blasting mining process for steeply inclined thin ore body |
| CN113847028A (en) * | 2021-08-13 | 2021-12-28 | 安徽金日晟矿业有限责任公司 | Deep hole arrangement process for back stepping of broken ore body |
| CN113898345A (en) * | 2021-10-26 | 2022-01-07 | 山东黄金矿业股份有限公司新城金矿 | Underground metal mine stage mining deep hole cutting groove-drawing method |
| CN114033373A (en) * | 2021-10-22 | 2022-02-11 | 武汉工程大学 | Raise boring machine-medium-length hole differential blasting cooperative one-time grooving method |
| CN114674185A (en) * | 2022-03-02 | 2022-06-28 | 长沙矿山研究院有限责任公司 | High and large stope contour control blasting method |
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Cited By (8)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN112523753A (en) * | 2020-12-17 | 2021-03-19 | 铜陵有色金属集团铜冠矿山建设股份有限公司 | Method for effectively improving one-time mining height of mine |
| CN112963147A (en) * | 2021-03-17 | 2021-06-15 | 内蒙古包头鑫达黄金矿业有限责任公司 | Medium-length hole blasting mining process for steeply inclined thin ore body |
| CN112963147B (en) * | 2021-03-17 | 2022-01-11 | 内蒙古包头鑫达黄金矿业有限责任公司 | Medium-length hole blasting mining process for steeply inclined thin ore body |
| CN113847028A (en) * | 2021-08-13 | 2021-12-28 | 安徽金日晟矿业有限责任公司 | Deep hole arrangement process for back stepping of broken ore body |
| CN114033373A (en) * | 2021-10-22 | 2022-02-11 | 武汉工程大学 | Raise boring machine-medium-length hole differential blasting cooperative one-time grooving method |
| CN114033373B (en) * | 2021-10-22 | 2024-02-06 | 武汉工程大学 | Reverse well drilling machine-medium deep hole differential blasting collaborative primary grooving method |
| CN113898345A (en) * | 2021-10-26 | 2022-01-07 | 山东黄金矿业股份有限公司新城金矿 | Underground metal mine stage mining deep hole cutting groove-drawing method |
| CN114674185A (en) * | 2022-03-02 | 2022-06-28 | 长沙矿山研究院有限责任公司 | High and large stope contour control blasting method |
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| CN112031771B (en) | 2023-06-06 |
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