CN110966005A - Novel medium-length hole ore-breaking stage chamber method - Google Patents
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- 238000000034 method Methods 0.000 title claims abstract description 33
- 238000009423 ventilation Methods 0.000 claims abstract description 48
- 238000005065 mining Methods 0.000 claims abstract description 30
- 239000000463 material Substances 0.000 claims abstract description 20
- 239000011435 rock Substances 0.000 claims abstract description 13
- 238000005422 blasting Methods 0.000 claims abstract description 9
- 230000005641 tunneling Effects 0.000 claims abstract description 3
- 210000003462 vein Anatomy 0.000 claims description 27
- 238000005553 drilling Methods 0.000 claims description 11
- 238000007599 discharging Methods 0.000 claims description 10
- 238000000605 extraction Methods 0.000 claims description 6
- RYGMFSIKBFXOCR-UHFFFAOYSA-N Copper Chemical compound [Cu] RYGMFSIKBFXOCR-UHFFFAOYSA-N 0.000 description 4
- 229910052802 copper Inorganic materials 0.000 description 4
- 239000010949 copper Substances 0.000 description 4
- BQCADISMDOOEFD-UHFFFAOYSA-N Silver Chemical compound [Ag] BQCADISMDOOEFD-UHFFFAOYSA-N 0.000 description 2
- 238000005520 cutting process Methods 0.000 description 2
- 238000004519 manufacturing process Methods 0.000 description 2
- 229910052709 silver Inorganic materials 0.000 description 2
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- 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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- E21F—SAFETY DEVICES, TRANSPORT, FILLING-UP, RESCUE, VENTILATION, OR DRAINING IN OR OF MINES OR TUNNELS
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- E21F15/06—Filling-up mechanically
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Abstract
The invention discloses a novel medium-length hole ore-breaking stage chamber method, which comprises the steps of dividing ore blocks along the trend of an ore body, dividing and segmenting the interior of each ore block, and reserving studs between adjacent ore blocks; tunneling various kinds of mining roadways, arranging a movable working platform in the stage pedestrian ventilation patio, mounting a frame type medium-length hole rock drill on the platform, and controlling the platform to move up and down along the stage pedestrian ventilation patio; drawing the bottom along the full thickness of the ore body to form a triangular goaf, filling the goaf with high-strength cementing material to form an artificial trench bottom structure, wherein the high-strength cementing material is used as a bottom pillar and a lower-stage top pillar at the same time; sequentially blasting stoping stud ore bodies from bottom to top, and cementing and filling the stud goaf to form an artificial stud; and (3) blasting stoping chamber ore bodies from bottom to top in sequence, and filling the goaf of the chamber with graded tailing non-cemented filling bodies. Compared with a traditional medium-length hole ore-breaking stage chamber method, the method has the advantages of less mining accurate engineering quantity, high efficiency, low ore loss rate and the like.
Description
Technical Field
The invention relates to the technical field of mining methods, in particular to a novel medium-length hole ore-breaking stage chamber method.
Background
According to the introduction of mining science (second edition), Wangqing and Ningpo, the metallurgical industry publisher, 2013, P292-295), a medium-deep hole ore-breaking stage room method refers to a multi-stage rock-drilling stage room method (part of teaching materials and documents are called as a staged rock-drilling stage ore removal method), a staged rock-drilling stage room method is widely used in domestic underground metal mines, and the method is characterized in that a stoping working face is vertical, a vertical cutting groove needs to be drilled except for bottom drawing and leakage forming at the bottom of a room before stoping is started, ore breaking is carried out by taking the vertical cutting groove as a free face, the ore which is broken off falls to the bottom of the room by self weight and is discharged, a goaf is enlarged along with the advance of the working face, and an ore pillar is continuously mined by other methods after stoping of the room is finished.
Disclosure of Invention
Aiming at the technical problems, the invention provides a novel medium-length hole ore-breaking stage chamber method which has the advantages of less mining accurate engineering quantity, high efficiency, low ore loss rate and the like.
In order to achieve the above purpose, the technical scheme of the invention is as follows:
a novel medium-length hole ore-breaking stage chamber method comprises the following steps:
A. structural parameter division: dividing ore blocks along the direction of an ore body, wherein the length of each ore block is 80-100m, the height of each ore block is 50-80m, the interior of each ore block is divided into sections, the height of each section is 10-16m, a spacing column is reserved between every two adjacent ore blocks, and the width of each spacing column is 5-8 m;
B. and (3) mining work: firstly, a stage transportation roadway passes through a connecting channel, a stage lower-disk vein-following ore removal roadway is tunneled, the stage lower-disk vein-following ore removal roadway is 6-8m away from the boundary of a lower disk of an ore body, the stage lower-disk vein-following ore removal roadway is tunneled through the connecting channel to form a lower-disk vein-following trench roadway and an intra-vein-following drag roadway, the lower-disk vein-following trench roadway is positioned at the boundary of the lower disk of the ore body, the intra-vein-following drag roadway is positioned in the middle of the ore body, the step of tunneling a stage artificial ventilation raise is tunneled in the boundary of the lower disk surrounding rock of the ore body to run through an upper stage and a lower stage, a mobile working platform is arranged in the stage artificial ventilation raise, a frame type medium-length hole rock drill is arranged on the mobile working platform, and a slow-motion winch is arranged in the upper stage to control;
C. bottom pulling work: drawing the bottom along the whole thickness of an ore body in an intravein vein bottom-drawing gallery in a shallow hole ore-falling mode to finally form a triangular goaf with a low lower wall and a high upper wall, filling the goaf with high-strength cementing materials after mining to form a trench bottom structure with the gradient of 45-55 degrees, wherein the high-strength cementing materials are simultaneously used as a bottom column and a lower-stage top column of the stage;
D. and (3) carrying out extraction, ore removal and filling work on the pillars: drilling a medium-length hole into the stud in the stage manway ventilation patio positioned at the stud position in the step A, blasting stoping stud ore bodies from bottom to top along the stage manway ventilation patio, conveying the blasted ore out from a lower-disc vein-following trench roadway through a stage lower-disc vein-following ore removal roadway by a scraper, and performing cemented filling on a stud gob to form an artificial stud;
E. stoping, ore removal and filling work of the stope: after the artificial studs on the two sides of the chamber are formed, drilling medium-length holes into the chamber in a stage pedestrian ventilation raise located in the middle of the chamber, blasting the stope chamber ore bodies from bottom to top along the stage pedestrian ventilation raise, conveying the blasted ore out from a lower-tray vein-following trench drift through a stage lower-tray vein-following ore-discharging drift by a scraper, and filling the chamber goaf with graded tailing non-cemented filling bodies.
And in the step C, after mining, filling the goaf with 8-10MPa of high-strength cementing material.
And D, adopting 6Mpa cemented filling of the interval column gob to form an artificial interval column.
And in the step E, filling the goaf of the chamber by using a 1-2.5MPa graded tailing non-cemented filling body.
Furthermore, when one ore block is subjected to the operation of the step E, the adjacent ore blocks can be simultaneously subjected to the operation of the step D.
The invention has the beneficial effects that: compared with the traditional medium-length hole ore-breaking stage chamber method, the medium-length hole rock drilling is carried out in the lower tray raise, and a large amount of mining preparation engineering is saved; the form of artificial studs is adopted, so that the ore loss caused by studs left among ore blocks is eliminated; the ore removal efficiency is improved by utilizing an artificial trench ore removal mode, and the ore loss caused by reserving a bottom column and a top column among ore blocks is eliminated.
Drawings
FIG. 1 is a schematic view of the patent taken along the direction of the ore body;
FIG. 2 is a schematic view of the patent showing a view perpendicular to the direction of the ore body;
FIG. 3 is a top view of FIGS. 1 and 2;
in FIGS. 1-3: 1-stage transportation lane; 2-stage footwall drawing roadway along the vein; 3-a footwall along a pulse trench drift; 4-stage pedestrian ventilation raise; 5-high strength cementing material; 6-artificial stud spacing; 7-medium-length hole; 8-breaking down the ore; 9-non-cemented filling mass.
Detailed Description
Example 1
The deep copper ore of the silver company is a typical domestic inclined medium-thick ore body, and a sublevel caving method without a sill pillar is mainly adopted. In order to reduce the loss rate of ore, a stage chamber method test study is planned to be developed in a high-grade area of an east mining area, and because the loss rate is high and the efficiency is low, the traditional stage chamber method is not suitable for being directly applied to deep copper ore, and finally, blind ore bodies in an 8-stage 700-plus-760 line area are determined to test the novel medium-deep hole ore-falling stage chamber method, and the production capacity of a stope is 120-150 t/d; and the mining loss rate is 6-8%. The specific implementation mode is as follows:
as shown in fig. 1-3, a novel medium-length hole ore-breaking stage chamber method comprises the following steps:
A. structural parameter division: dividing ore blocks along the direction of an ore body, wherein the length of each ore block is 80m, the height of each ore block is 60m, the interior of each ore block is divided into sections, the height of each section is 15m, a spacing column is reserved between every two adjacent ore blocks, and the width of each spacing column is 8 m;
B. and (3) mining work: firstly, a stage transportation lane 1 tunnels a stage lower-tray vein ore removal gallery 2 through a connecting channel, the stage lower-tray vein ore removal gallery 2 is 8m away from the boundary of a lower plate of an ore body, the stage lower-tray vein ore removal gallery 2 tunnels a lower-tray vein trench gallery 3 and an intra-vein trench-drag gallery through the connecting channel, the lower-tray vein trench gallery 3 is positioned at the boundary of the lower plate of the ore body, the intra-vein trench-drag gallery is positioned in the middle of the ore body, the trend of the ore body is 40m, a stage pedestrian ventilation raise 4 is tunneled in the boundary of the lower-tray surrounding rock of the ore body to run through an upper stage and a lower stage, a mobile working platform is arranged in the stage pedestrian ventilation raise 4, a rack-type medium-length hole rock drill is arranged on the mobile working platform, and a slow-motion winch is arranged in the upper stage to control the mobile working platform to move up and down along the stage pedestrian;
C. bottom pulling work: drawing the bottom along the whole thickness of an ore body in a vein-in vein-along bottom-drawing gallery in a shallow hole ore-falling mode to finally form a triangular goaf with a low lower tray and a high upper tray, filling the goaf with 8MPa high-strength cementing material 5 after mining to form a trench bottom structure with a gradient of about 45 degrees, wherein the high-strength cementing material 5 is used as a bottom pillar and a lower-stage top pillar at the same time;
D. and (3) carrying out extraction, ore removal and filling work on the pillars: drilling a medium-length hole into the stud in the stage manway 4 positioned at the stud position in the step A, blasting mining stud ore bodies along the stage manway 4 from bottom to top in sequence, transporting the blasted ore out from a lower-disc vein-following trench drift 3 through a stage lower-disc vein-following ore-discharging drift 2 by a scraper, and performing cemented filling on a stud goaf under 6Mpa to form an artificial stud 6;
E. stoping, ore removal and filling work of the stope: after the artificial studs on the two sides of the chamber are formed, a medium-length hole 7 is drilled into the chamber in the stage pedestrian ventilation patio 4 positioned in the middle of the chamber, the chamber ore bodies are blasted back along the stage pedestrian ventilation patio 4 from bottom to top, the blasted ore 8 is conveyed out from the lower-disk vein-following trench gallery 3 through the stage lower-disk vein-following ore-discharging gallery 2 by a scraper, and the chamber goaf is filled with 1MPa graded tailing non-cemented filling bodies 9.
The ventilation of the stope adopts a combined ventilation mode of a main ventilation system and a local fan, fresh air flow enters a working face from the stage transportation lane 1 through the pedestrian ventilation patio 4, and dirty air is discharged into the upper stage air return system from the working face and is discharged.
Example 2
The deep copper ore of the silver company is a typical domestic inclined medium-thick ore body, and a sublevel caving method without a sill pillar is mainly adopted. In order to reduce the loss rate of ore, a stage chamber method test study is planned to be developed in a high-grade area of an east mining area, and because the loss rate is high and the efficiency is low, the traditional stage chamber method is not suitable for being directly applied to deep copper ore, and finally, blind ore bodies in an 8-stage 700-plus-760 line area are determined to test the novel medium-deep hole ore-falling stage chamber method, and the production capacity of a stope is 120-150 t/d; and the mining loss rate is 6-8%. The specific implementation mode is as follows:
as shown in fig. 1-3, a novel medium-length hole ore-breaking stage chamber method comprises the following steps:
A. structural parameter division: dividing ore blocks along the direction of an ore body, wherein the length of each ore block is 80m, the height of each ore block is 60m, the interior of each ore block is divided into sections, the height of each section is 15m, a spacing column is reserved between every two adjacent ore blocks, and the width of each spacing column is 8 m;
B. and (3) mining work: firstly, a stage transportation lane 1 tunnels a stage lower-tray vein ore removal gallery 2 through a connecting channel, the stage lower-tray vein ore removal gallery 2 is 8m away from the boundary of a lower plate of an ore body, the stage lower-tray vein ore removal gallery 2 tunnels a lower-tray vein trench gallery 3 and an intra-vein trench-drag gallery through the connecting channel, the lower-tray vein trench gallery 3 is positioned at the boundary of the lower plate of the ore body, the intra-vein trench-drag gallery is positioned in the middle of the ore body, the trend of the ore body is 40m, a stage pedestrian ventilation raise 4 is tunneled in the boundary of the lower-tray surrounding rock of the ore body to run through an upper stage and a lower stage, a mobile working platform is arranged in the stage pedestrian ventilation raise 4, a rack-type medium-length hole rock drill is arranged on the mobile working platform, and a slow-motion winch is arranged in the upper stage to control the mobile working platform to move up and down along the stage pedestrian;
C. bottom pulling work: drawing the bottom along the whole thickness of an ore body in a vein-in vein-along bottom-drawing roadway in a shallow hole ore-falling mode to finally form a triangular goaf with a low lower tray and a high upper tray, filling the goaf with 10MPa high-strength cementing material 5 after mining to form a trench bottom structure with a gradient of about 45 degrees, wherein the high-strength cementing material 5 is used as a bottom pillar and a lower-stage top pillar at the same time;
D. and (3) carrying out extraction, ore removal and filling work on the pillars: drilling a medium-length hole into the stud in the stage manway 4 positioned at the stud position in the step A, blasting mining stud ore bodies along the stage manway 4 from bottom to top in sequence, transporting the blasted ore out from a lower-disc vein-following trench drift 3 through a stage lower-disc vein-following ore-discharging drift 2 by a scraper, and performing cemented filling on a stud goaf under 6Mpa to form an artificial stud 6;
E. stoping, ore removal and filling work of the stope: after the artificial studs on the two sides of the chamber are formed, a medium-length hole 7 is drilled into the chamber in the stage pedestrian ventilation patio 4 positioned in the middle of the chamber, the chamber ore bodies are blasted back along the stage pedestrian ventilation patio 4 from bottom to top, the blasted ore 8 is conveyed out from the lower-disk vein-following trench drift 3 through the stage lower-disk vein-following ore-discharging drift 2 by a scraper, and 2.5MPa graded tailing non-cemented filling bodies 9 are filled in the chamber goaf.
The ventilation of the stope adopts a combined ventilation mode of a main ventilation system and a local fan, fresh air flow enters a working face from the stage transportation lane 1 through the pedestrian ventilation patio 4, and dirty air is discharged into the upper stage air return system from the working face and is discharged.
Example 3
As shown in fig. 1-3, a novel medium-length hole ore-breaking stage chamber method comprises the following steps:
A. structural parameter division: dividing ore blocks along the direction of an ore body, wherein the length of each ore block is 80m, the height of each ore block is 50m, the ore blocks are divided into sections, the height of each section is 10m, studs are reserved between every two adjacent ore blocks, and the width of each stud is 5 m;
B. and (3) mining work: firstly, a stage transportation lane 1 tunnels a stage lower-tray vein ore removal gallery 2 through a connecting channel, the stage lower-tray vein ore removal gallery 2 is 6m away from the boundary of the lower tray of an ore body, the stage lower-tray vein ore removal gallery 2 tunnels a lower-tray vein trench gallery 3 and an intra-vein trench-drag gallery through the connecting channel, the lower-tray vein trench gallery 3 is positioned at the boundary of the lower tray of the ore body, the intra-vein trench-drag gallery is positioned in the middle of the ore body, the trend of the ore body is 40m, a stage pedestrian ventilation raise 4 is tunneled in the boundary of the lower tray of the ore body to run through an upper stage and a lower stage, a mobile working platform is arranged in the stage pedestrian ventilation raise 4, a rack-type medium-length hole rock drill is arranged on the mobile working platform, and a slow-motion winch is arranged in the upper stage to control the mobile working platform to move up and down along the stage pedestrian raise 4;
C. bottom pulling work: drawing the bottom along the whole thickness of an ore body in a vein-in vein-along bottom-drawing gallery in a shallow hole ore-falling mode to finally form a triangular goaf with a low lower tray and a high upper tray, filling the goaf with high-strength cementing materials 5 after mining to form a trench bottom structure with the gradient of about 45, wherein the high-strength cementing materials 5 are simultaneously used as a bottom column and a lower-stage top column of the stage;
D. and (3) carrying out extraction, ore removal and filling work on the pillars: drilling a medium-length hole into the stud in the stage manway 4 positioned at the stud position in the step A, blasting mining stud ore bodies along the stage manway 4 from bottom to top in sequence, conveying the blasted ore out from a lower-disc vein-following trench gallery 3 through a stage lower-disc vein-following ore-discharging gallery 2 by a scraper, and performing cemented filling on a stud gob to form an artificial stud 6;
E. stoping, ore removal and filling work of the stope: after the artificial studs on the two sides of the chamber are formed, a medium-length hole 7 is drilled into the chamber in the stage pedestrian ventilation patio 4 positioned in the middle of the chamber, the chamber ore bodies are blasted back along the stage pedestrian ventilation patio 4 from bottom to top, the blasted ore 8 is conveyed out from the lower-disk vein-following trench gallery 3 through the stage lower-disk vein-following ore-discharging gallery 2 by a scraper, and the chamber goaf is filled with the graded tailing non-cemented filling body 9.
And C, filling the goaf with 8MPa high-strength cementing material 5 after mining.
And D, in the step D, adopting 6Mpa cemented filling of the interval column goaf to form an artificial interval column 6.
And E, filling the goaf of the stope by adopting a 1MPa graded tailing non-cemented filling body 9.
The ventilation of the stope adopts a combined ventilation mode of a main ventilation system and a local fan, fresh air flow enters a working face from the stage transportation lane 1 through the pedestrian ventilation patio 4, and dirty air is discharged into the upper stage air return system from the working face and is discharged.
Example 4
As shown in fig. 1-3, a novel medium-length hole ore-breaking stage chamber method comprises the following steps:
A. structural parameter division: dividing ore blocks along the direction of an ore body, wherein the length of each ore block is 100m, the height of each ore block is 80m, the interior of each ore block is divided into sections, the height of each section is 16m, a spacing column is reserved between every two adjacent ore blocks, and the width of each spacing column is 8 m;
B. and (3) mining work: firstly, a stage transportation lane 1 tunnels a stage lower-tray vein ore removal gallery 2 through a connecting channel, the stage lower-tray vein ore removal gallery 2 is 8m away from the boundary of a lower plate of an ore body, the stage lower-tray vein ore removal gallery 2 tunnels a lower-tray vein trench gallery 3 and an intra-vein trench-drag gallery through the connecting channel, the lower-tray vein trench gallery 3 is positioned at the boundary of the lower plate of the ore body, the intra-vein trench-drag gallery is positioned in the middle of the ore body, the trend of the ore body is 50m, a stage pedestrian ventilation raise 4 is tunneled in the boundary of the lower-tray surrounding rock of the ore body to run through an upper stage and a lower stage, a mobile working platform is arranged in the stage pedestrian ventilation raise 4, a rack-type medium-length hole rock drill is arranged on the mobile working platform, and a slow-motion winch is arranged in the upper stage to control the mobile working platform to move up and down along the stage pedestrian;
C. bottom pulling work: drawing the bottom along the whole thickness of an ore body in a vein-in vein-along bottom-drawing gallery in a shallow hole ore-falling mode to finally form a triangular goaf with a low lower tray and a high upper tray, filling the goaf with high-strength cementing materials 5 after mining to form a trench bottom structure with the gradient of about 55 degrees, wherein the high-strength cementing materials 5 are simultaneously used as a bottom column and a lower-stage top column in the stage;
D. and (3) carrying out extraction, ore removal and filling work on the pillars: drilling a medium-length hole into the stud in the stage manway 4 positioned at the stud position in the step A, blasting mining stud ore bodies along the stage manway 4 from bottom to top in sequence, conveying the blasted ore out from a lower-disc vein-following trench gallery 3 through a stage lower-disc vein-following ore-discharging gallery 2 by a scraper, and performing cemented filling on a stud gob to form an artificial stud 6;
E. stoping, ore removal and filling work of the stope: after the artificial studs on the two sides of the chamber are formed, a medium-length hole 7 is drilled into the chamber in the stage pedestrian ventilation patio 4 positioned in the middle of the chamber, the chamber ore bodies are blasted back along the stage pedestrian ventilation patio 4 from bottom to top, the blasted ore 8 is conveyed out from the lower-disk vein-following trench gallery 3 through the stage lower-disk vein-following ore-discharging gallery 2 by a scraper, and the chamber goaf is filled with the graded tailing non-cemented filling body 9.
And C, filling the goaf with 10MPa high-strength cementing material 5 after mining.
And D, in the step D, adopting 6Mpa cemented filling of the interval column goaf to form an artificial interval column 6.
And E, filling the goaf of the stope by adopting a 2.5MPa graded tailing non-cemented filling body 9.
The ventilation of the stope adopts a combined ventilation mode of a main ventilation system and a local fan, fresh air flow enters a working face from the stage transportation lane 1 through the pedestrian ventilation patio 4, and dirty air is discharged into the upper stage air return system from the working face and is discharged.
Claims (5)
1. A novel medium-length hole ore breaking stage chamber method is characterized by comprising the following steps:
A. structural parameter division: dividing ore blocks along the direction of an ore body, wherein the length of each ore block is 80-100m, the height of each ore block is 50-80m, the interior of each ore block is divided into sections, the height of each section is 10-16m, a spacing column is reserved between every two adjacent ore blocks, and the width of each spacing column is 5-8 m;
B. and (3) mining work: firstly, a stage transport lane (1) tunnels a stage lower-disk vein ore removal roadway (2) through a connecting channel, the stage lower-disk vein ore removal roadway (2) is 6-8m away from the boundary of an ore body lower disk, the stage lower-disk vein ore removal roadway (2) tunnels a lower-disk vein trench roadway (3) and an intra-vein bottom-drawing roadway through the connecting channel, the lower-disk vein trench roadway (3) is positioned at the boundary of the ore body lower disk, the intra-vein bottom-drawing roadway is positioned in the middle of the ore body and runs every 40-50m along the ore body, the manway ventilation raise (4) is communicated with the upper and lower stages in the tunneling stage in the junction of the ore body lower wall surrounding rock, a movable working platform is arranged in the stage pedestrian ventilation patio (4), a frame type medium-length hole rock drill is arranged on the movable working platform, a slow-motion winch is arranged in the upper stage to control the movable working platform to move up and down along the stage pedestrian ventilation raise shaft (4);
C. bottom pulling work: drawing the bottom along the whole thickness of an ore body in a vein-in vein-along bottom-drawing roadway in a shallow hole ore-falling mode to finally form a triangular goaf with a low lower tray and a high upper tray, filling the goaf with high-strength cementing materials (5) after mining to form a trench bottom structure with the gradient of 45-55 degrees, wherein the high-strength cementing materials (5) are simultaneously used as a bottom pillar and a lower-stage top pillar in the stage;
D. and (3) carrying out extraction, ore removal and filling work on the pillars: drilling a medium-length hole into the stud in the stage manway ventilation patio (4) positioned at the position of the stud in the step A, blasting and stoping stud ore bodies from bottom to top along the stage manway ventilation patio (4), conveying the collapsed ore from a lower-disk vein-following trench drift (3) through a stage lower-disk vein-following ore-discharging drift (2) by a scraper, and cementing and filling a stud goaf to form an artificial stud (6);
E. stoping, ore removal and filling work of the stope: after the artificial studs (6) on the two sides of the chamber are formed, a medium-length hole (7) is drilled into the chamber in the stage pedestrian ventilation raise (4) positioned in the middle of the chamber, stope chamber ore bodies are sequentially blasted from bottom to top along the stage pedestrian ventilation raise (4), the blasted ore (8) is conveyed out from a lower-disk vein-following trench drift (3) through a stage lower-disk vein-following ore removal drift (2) by a scraper, and the chamber goaf is filled with graded tailing non-cemented filling bodies (9).
2. The novel medium-length hole ore-breaking stage chamber method as claimed in claim 1, wherein in the step C, the goaf is filled with 8-10MPa high-strength cementing material (5) after mining.
3. The novel medium-length hole ore-breaking stage chamber method as claimed in claim 1, wherein in the step D, a cemented filling stud goaf of 6Mpa is adopted to form an artificial stud (6).
4. The novel medium-length hole ore-breaking stage chamber method as claimed in claim 1, wherein in the step E, a chamber gob area is filled with a graded tailing non-cemented filling body (9) of 1-2.5 MPa.
5. The novel medium-length hole ore-breaking stage chamber method as claimed in claim 1, wherein when one ore block is subjected to the operation of step E, the adjacent ore blocks can be subjected to the operation of step D simultaneously.
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Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN111997611A (en) * | 2020-09-07 | 2020-11-27 | 贵州紫金矿业股份有限公司 | Steeply inclined ore body inclination raise sublevel mining method |
| CN113565552A (en) * | 2021-07-01 | 2021-10-29 | 山东黄金矿业(莱州)有限公司三山岛金矿 | Ventilation optimization method for underground multi-middle-section mining operation |
| CN114427462A (en) * | 2022-01-06 | 2022-05-03 | 紫金矿业集团股份有限公司 | Medium-length hole ore-matching type mining method for steep thin ore vein |
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| CN114427462A (en) * | 2022-01-06 | 2022-05-03 | 紫金矿业集团股份有限公司 | Medium-length hole ore-matching type mining method for steep thin ore vein |
| CN114427462B (en) * | 2022-01-06 | 2022-11-11 | 紫金矿业集团股份有限公司 | Medium-length hole ore-matching type mining method for steep thin ore vein |
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