CN110700833A - Medium-length hole multi-stope and subsection common drop shaft mining method for hanging wall ore body mining - Google Patents
Medium-length hole multi-stope and subsection common drop shaft mining method for hanging wall ore body mining Download PDFInfo
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- 238000005065 mining Methods 0.000 title claims abstract description 54
- 238000000034 method Methods 0.000 title claims abstract description 24
- 238000005520 cutting process Methods 0.000 claims abstract description 42
- 239000011435 rock Substances 0.000 claims abstract description 29
- 238000005553 drilling Methods 0.000 claims abstract description 27
- 238000005422 blasting Methods 0.000 claims abstract description 12
- 238000004519 manufacturing process Methods 0.000 claims abstract description 6
- 238000009423 ventilation Methods 0.000 claims description 14
- 238000013459 approach Methods 0.000 claims description 5
- 238000007599 discharging Methods 0.000 claims description 3
- 238000004891 communication Methods 0.000 claims 1
- 230000005641 tunneling Effects 0.000 abstract description 5
- 230000008520 organization Effects 0.000 abstract description 2
- 230000011218 segmentation Effects 0.000 description 4
- 238000010276 construction Methods 0.000 description 2
- 230000018109 developmental process Effects 0.000 description 2
- 230000001105 regulatory effect Effects 0.000 description 2
- 230000007704 transition Effects 0.000 description 2
- 238000009412 basement excavation Methods 0.000 description 1
- 239000002184 metal Substances 0.000 description 1
- 230000002035 prolonged effect Effects 0.000 description 1
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- 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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Abstract
A medium-length hole multi-stope and subsection common drop shaft mining method for hanging slope ore body mining comprises the following steps: carrying out stage division and subsection division on the hanging wall ore body according to the height of the open bench, and reserving transverse and longitudinal studs and side slope security pillars; tunneling a connecting road to reach an ore body by utilizing a transport roadway and a sectional roadway, and constructing an ore removal structure and a sectional rock drilling roadway; when stoping, simultaneously carrying out medium-length hole blasting operation on a plurality of stopes, carrying out lateral ore caving by taking the cutting groove as a free surface, and carrying out ore slipping of each stage to a centralized stage transportation roadway through a chute and then to the ground surface; and after the open-air production is finished, the studs and the jack posts are recovered in time. By adopting the invention, the mining and cutting cost and the difficulty of organization and management of workers can be reduced, the ore removal efficiency is improved, and the influence of transportation operation on the slope stability is reduced.
Description
Technical Field
The invention relates to a mining method for underground mining of metal mines, in particular to a medium-length hole multi-stope and subsection common drop shaft mining method for hanging wall ore body mining.
Background
At present, the mining modes of the hanging wall ore body are mainly divided into open-pit mining and underground mining, and the development conditions of part of mines require that the hanging wall ore body is recovered by adopting the underground mining mode. When the hanging slope ore body is recovered by adopting an underground mining mode, continuous movement and deformation of an open-air side slope, an overlying rock stratum and the earth surface are inevitably caused, and the deformation can influence the surrounding geography and environment; the hanging wall ore body mining design needs to consider the coordination with the open-pit mining in time and space, meanwhile, the smooth connection with the main engineering of underground mining is ensured, and the yield of the hanging wall ore body is reasonably regulated and controlled so that the mine yield keeps stable transition; the independently designed hanging wall ore body development system has high cost and prolonged capital construction time, and how to utilize the existing open mine production system and equipment should be considered. Therefore, the reasonable hanging wall ore body mining system has important significance for realizing safe and efficient recovery of the hanging wall ore body and ensuring smooth and stable transition of strip mine to underground mining.
Disclosure of Invention
Aiming at the problems in the prior art, the invention provides a medium-length hole multi-stope and subsection common drop shaft mining method for hanging wall ore body mining. The open pit is excavated by utilizing the existing open steps, and transverse and longitudinal pillars and side slope security pillars are reserved to form a stable frame structure, so that the stability of the whole open border, open roads and hanging slope ore body stopes is ensured; the strip ore body and the hanging wall ore body are produced simultaneously without mutual interference, a plurality of stopes of the hanging wall ore body operate simultaneously, and the stable ore yield is ensured; when the exploitation of the hanging wall ore body is finished, the foundation construction of the underground exploitation main body project is basically finished, and the studs and the top studs of the caving hanging wall ore body can form a covering layer for lower exploitation, so that the connection with the underground exploitation main body project is facilitated, the studs are recycled, and the resource utilization rate is improved; the method adopts a medium-length hole blasting mode, ore removal is combined to a stage haulage roadway in a stage in a sectional mode, then the ore is hauled out to a centralized haulage roadway by using a drop shaft in each stage, the existing trackless haulage equipment is adopted for in-pit transportation, and the mining and cutting engineering quantity and the production cost are reduced.
In order to solve the technical problem, the technical scheme adopted by the invention is as follows: a medium-length hole multi-stope and subsection common drop shaft mining method for hanging slope ore body mining comprises the following steps:
(1) carrying out stage division and subsection division on the hanging wall ore body according to the height of the open bench, arranging medium-thickness ore body ore blocks along the trend, arranging thick ore body ore blocks in the vertical trend, dividing and sectioning in the ore blocks according to the height of the open bench, and reserving transverse and longitudinal pillars and slope security pillars;
(2) before stoping of a stope, excavating ore removal connecting roads, sectional rock drilling connecting roads, ore removal cross roads and ore loading access roads by utilizing a sectional transport drift and a sectional drift, arranging an ore collection trench at the end part of the ore loading access roads, arranging a cutting drift and a cutting raise by utilizing the ore collection trench and the sectional rock drilling tunnels, and expanding the cut raise to form a cutting groove by utilizing medium-length hole blasting;
(3) when stoping, simultaneously operating 2 or more stopes, drilling medium-length hole blast holes, charging, laterally caving by taking the cutting groove as a free surface, discharging 1/3 of the amount of the caving ore after blasting 1-2 rows of holes each time, and leaving the rest ore in the stope to support surrounding rock; after all ore blocks are blasted, a large amount of ore is removed in a high-strength mode, segmented ore in each stage is removed in a centralized mode, the ore in each stage is slipped to a transportation roadway of the centralized stage through a chute, and the ore is transported to the ground surface by existing transportation equipment of an open-pit mine;
(4) and after the open-air production is finished, the studs and the jack posts are recovered in time.
The height of the hanging wall ore body in the stage division is 48m, the length of the ore block is 50m, the width of the ore block is 20m, the height of the rock drilling subsection is 24m, the width of the longitudinal pillar is 6m, the width of the transverse pillar is 8m, and the thickness of the top pillar is 6 m.
The step division of the hanging side ore body is to dig galleries from open-air step platforms, dig in concentrated stage transportation galleries, sectional galleries and return air galleries from the galleries of each step, dig in return air horizontal roadways communicated with ventilation shafts from the return air galleries, dig in ventilation communicated shafts from the transportation galleries and the sectional galleries of each stage, and dig in communicated shafts from the shafts.
Before stoping of a chamber, a ore removal connecting roadway is tunneled from a stage transport roadway, an ore removal cross roadway is tunneled from the ore removal connecting roadway, ore loading approach roads are tunneled from the ore removal cross roadway to two sides, an ore collection trench is tunneled from the end part of the ore loading approach road, a cutting drift is tunneled from the end part of the ore collection trench, a cutting raise is tunneled upwards from the end part of the cutting drift, the cutting raise is expanded to form a cutting groove by medium-length hole blasting, a subsection rock drilling connecting roadway is tunneled from the subsection drift, a subsection rock drilling roadway is tunneled from the subsection rock drilling connecting roadway, a cutting drift is tunneled from the end part of the subsection rock drilling roadway, and a cutting raise is tunneled from the end part of the cutting drift.
The specifications of the concentrated stage transportation drift and the stage transportation drift are both 4.2 multiplied by 4.8m2The specifications of the subsection drift, the return air drift and the return air cross drift are all 4.2 multiplied by 4.0m2。
The specification of the ventilation connecting channel is 2.5 multiplied by 2.833m2The specification of the ventilation courtyard is 3 multiplied by 3m2。
The specification of the drop shaft connecting passage is 4.5 multiplied by 4.1m2And the diameter of the drop shaft is 4 m.
The specifications of the ore removal connecting road, the ore removal cross road and the ore loading route are all 4.5 multiplied by 4.1m2。
The specifications of the ore collecting trench, the sectional rock drilling connecting channel and the sectional rock drilling roadway are all 4.2 multiplied by 4.0m2。
The specifications of the cutting drift and the cutting raise are both 2.0 multiplied by 2.0m2。
The outstanding technical characteristics of the invention are as follows:
(1) according to the existing open bench, the hanging slope ore body is divided into stages, and transverse and longitudinal studs and slope security pillars are reserved to form a stable frame structure, so that the stability of the whole open border, open roads and hanging slope mine stopes is ensured.
(2) The method comprises the steps of carrying out segmentation division according to the existing open bench, arranging segmentation drifts, carrying out medium-length hole blasting on each segment, and carrying out ore removal on each segment ore through an ore removal structure of a bottom pillar in a centralized manner, so that the excavation of roadways such as a slope ramp, a segmentation ore pass and the like is avoided, the mining and cutting cost is reduced, and the ore removal efficiency is improved.
(3) According to the mine yield requirement, a plurality of stopes at each stage can be regulated and controlled to operate simultaneously to ensure that the surface mine is stably transited to underground mining.
(4) And after concentrated ore removal, the segmented ores in each stage are conveyed to a drop shaft through a conveying roadway in each stage to be conveyed to a concentrated conveying roadway, and then conveyed to the ground surface by trackless conveying, so that the influence of conveying operation on the stability of the side slope is reduced, and the difficulty of organization and management of workers is reduced.
Drawings
FIG. 1 is a sectional view of a medium-length hole multi-stope and sectional common drop shaft mining method I-I for hanging wall ore body mining.
FIG. 2 is a sectional view of a medium-length hole multi-stope and sectional common drop shaft mining method II-II for hanging wall ore body mining.
FIG. 3 is a sectional view of the medium-length hole multi-stope and sectional common drop shaft mining method for hanging wall ore body mining, which is disclosed by the invention.
Fig. 4 is a sectional view of the medium-length hole multi-stope and sectional common drop shaft mining method IV-IV for hanging wall ore body mining.
Labeled as: the system comprises a drift 1, a centralized stage transportation drift 2, a stage transportation drift 3, a sectional drift 4, a return air drift 5, a ventilation connecting channel 6, a ventilation raise 7, a return air cross drift 8, a drop shaft connecting channel 9, a drop shaft 10, a ore removal connecting channel 11, an ore removal cross drift 12, an ore loading access 13, an ore collection trench 14, a cutting drift 15, a cutting raise 16, a sectional rock drilling connecting channel 17, a sectional rock drilling tunnel 18, a blast hole 19, a transverse stud 20, a longitudinal stud 21, a side slope security pillar 22 and a top stud 23.
Detailed Description
The technical solution of the present invention is further described below by means of the accompanying drawings and examples.
As shown in fig. 1 to 4, the medium-length hole multi-stope and sectional common drop shaft mining method for hanging wall ore body mining comprises the following steps:
(1) carrying out stage division on the hanging wall ore body, arranging medium-thickness ore body blocks along the trend, arranging thick ore body blocks in the vertical trend, dividing and segmenting the ore body according to the height of an open-air step, reserving a transverse stud 20, a longitudinal stud 21 and a side slope security pillar 22, wherein the stage height is 48m, the length of the ore body is 50m, the width of the ore body is 20m, the height of the rock drilling segmentation is 24m, the width of the longitudinal stud 21 is 6m, the width of the transverse stud 20 is 8m, and the thickness of a top stud 23 is 6 m; digging adit 1 from open-air step platform, tunneling adit 1 of 4.2X 4.8m from each step 22, 4.2 x 4.8m of centralized stage transportation roadway 23, 4.2 x 4.0m of stage haulage driftway 24 and 4.2 x 4.0m of segmental drifts2The return air drift 5 is a self-return air drift5 tunneling 4.2X 4.0m2The air return horizontal roadway 8 is communicated with a ventilation raise 7, and 2.5 multiplied by 2.833m is tunneled from the transport level 3 and the subsection level 4 at each stage 26 communicated 3 x 3m ventilation connecting channel2The ventilation raise 7 is tunneled at 4.5 multiplied by 4.1m from the transport level 3 of each stage2The drop shaft connecting passage 9 is communicated with a drop shaft 10 with the diameter of 4 m.
(2) Before stoping of a chamber, self-staged transport driftway 3 is tunneled by 4.5 multiplied by 4.1m2The ore removal connecting passage 11 is tunneled by 4.5 multiplied by 4.1m from the ore removal connecting passage 112The ore removal cross drift 12 is tunneled to two sides by 4.5 multiplied by 4.1m from the ore removal cross drift 122The end part of the ore loading route 13 is tunneled by 4.2 multiplied by 4.0m2The end of the ore collecting trench 14 is tunneled by 2.0 multiplied by 2.0m2The cutting drift 15 is driven upwards by 2.0 multiplied by 2.0m from the end part of the cutting drift 152The cutting raise 16 is subjected to the slope expansion of the cutting raise by utilizing medium-length hole blasting to form a cutting groove; self-segmentation roadway 4 tunneling 4.2 multiplied by 4.0m2The sectional rock drilling connecting road 17 is used for tunneling 4.2 multiplied by 4.0m from the sectional rock drilling connecting road 172The sectional rock drilling roadway 18 is tunneled by 2.0 multiplied by 2.0m from the end part of the sectional rock drilling roadway 182The cutting drift 15 of (2.0X 2.0 m) is tunneled from the end part of the cutting drift 152The cutting raise 16 is subjected to the deep hole blasting to expand the cut raise to form a cutting groove.
(3) When stoping, simultaneously operating 2 or more stopes, drilling medium-length hole blast holes 19, charging, laterally caving by taking the cutting groove as a free surface, discharging 1/3 of the amount of the caving ore after blasting 1-2 rows of holes each time, and leaving the rest ore in the stope to support surrounding rock; after all ore blocks are blasted, a large amount of ore is removed in a high-strength mode, segmented ore in each stage is removed in a centralized mode, the ore in each stage is slipped to a centralized stage transportation roadway 2 through a chute 10, and the ore is transported to the ground surface by existing transportation equipment of a surface mine;
(4) and after the open-air production is finished, the transverse stud 20, the longitudinal stud 21 and the top stud 23 are recovered in time.
Claims (10)
1. A medium-length hole multi-stope and subsection common drop shaft mining method for hanging slope ore body mining is characterized by comprising the following steps:
(1) carrying out stage division and subsection division on the hanging wall ore body according to the height of the open bench, arranging medium-thickness ore body ore blocks along the trend, arranging thick ore body ore blocks in the vertical trend, and reserving transverse and longitudinal pillars and side slope security pillars;
(2) before stoping of a stope, excavating ore removal connecting roads, sectional rock drilling connecting roads, ore removal cross roads and ore loading access roads by utilizing a sectional transport drift and a sectional drift, arranging an ore collection trench at the end part of the ore loading access roads, arranging a cutting drift and a cutting raise by utilizing the ore collection trench and the sectional rock drilling tunnels, and expanding the cut raise to form a cutting groove by utilizing medium-length hole blasting;
(3) when stoping, simultaneously operating 2 or more stopes, drilling medium-length hole blast holes, charging, laterally caving by taking the cutting groove as a free surface, discharging 1/3 of the amount of the caving ore after blasting 1-2 rows of holes each time, and leaving the rest ore in the stope to support surrounding rock; after all ore blocks are blasted, a large amount of ore is removed in a high-strength mode, segmented ore in each stage is removed in a centralized mode, the ore in each stage is slipped to a transportation roadway in the centralized stage through a chute, and the ore is transported to the ground surface by the existing transportation equipment of the surface mine;
(4) and after the open-air production is finished, the studs and the jack posts are recovered in time.
2. The medium-length hole multi-stope and subsection co-drop shaft mining method for hanging wall ore body mining according to claim 1, wherein the height of the hanging wall ore body in the subsection is 48m, the length of an ore block is 50m, the width of the ore block is 20m, the height of a rock drilling subsection is 24m, the width of a longitudinal stud is 6m, the width of a transverse stud is 8m, and the thickness of a top stud is 6 m.
3. The medium-length hole multi-stope and sublevel co-ore pass mining method for hanging-slope ore body mining according to claim 1, characterized in that the hanging-slope ore body is divided into stages by excavating galleries from an open bench platform, excavating a centralized stage transportation gallery, a sublevel gallery and a return air gallery from the gallery of each bench, excavating a return air gallery communicating with a ventilation raise from the return air gallery, excavating a ventilation connecting communicating with the ventilation raise from each stage transportation gallery and the sublevel gallery, and excavating a drop shaft communicating with the drop shaft from each stage transportation gallery.
4. The medium-length hole multi-stope and sublevel co-pass mining method for hanging slope ore body mining according to claim 1, characterized in that before stope, a ore removal connecting tunnel is tunneled from a sublevel transportation gallery, an ore removal cross tunnel is tunneled from the ore removal connecting tunnel, ore loading approaches are tunneled from the ore removal cross tunnel to two sides, an ore collection trench is tunneled from the end of the ore loading approach, a cutting gallery is tunneled from the end of the ore collection trench, a cutting raise is tunneled upwards from the end of the cutting gallery, the cutting raise is expanded to form a cutting slot by medium-length hole blasting, a sublevel rock drilling connecting tunnel is tunneled from the sublevel rock removal connecting tunnel, a cutting gallery is tunneled from the end of the sublevel rock drilling tunnel, and the cutting raise is tunneled from the end of the cutting gallery.
5. The medium-length hole multi-stope and sublevel co-ore-pass mining method for hanging-wall ore body exploitation as claimed in claim 3, wherein the centralized stage haulage drift and the stage haulage drift are 4.2 x 4.8m in specification2The specifications of the subsection drift, the return air drift and the return air cross drift are all 4.2 multiplied by 4.0m2。
6. The medium-length hole multi-stope and sublevel co-drop shaft mining method for hanging wall ore body mining according to claim 3, wherein the specification of the ventilation connecting channel is 2.5 x 2.833m2The specification of the ventilation courtyard is 3 multiplied by 3m2。
7. The medium-length hole multi-stope and sublevel co-pass mining method for hanging wall ore body exploitation as claimed in claim 3, wherein the pass cross section specification is 4.5 x 4.1m2And the diameter of the drop shaft is 4 m.
8. The medium-length hole multi-stope and sublevel co-ore-pass mining method for hanging-slope ore body mining as claimed in claim 4, wherein the ore removal connecting road, the ore removal cross road and the ore loading approach roadAll the specifications are 4.5 multiplied by 4.1m2。
9. The medium-length hole multi-stope and sectional co-pass mining method for hanging wall ore body exploitation according to claim 4, wherein the ore collection trench, the sectional rock drilling communication channel and the sectional rock drilling roadway are all 4.2 x 4.0m in specification2。
10. The medium-length hole multi-stope and sublevel co-drop shaft mining method for hanging wall ore body exploitation as claimed in claim 4, wherein the cut drift and the cut raise are both 2.0 x 2.0m in specification2。
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Cited By (6)
| Publication number | Priority date | Publication date | Assignee | Title |
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| CN111764903A (en) * | 2020-06-30 | 2020-10-13 | 贵州开磷有限责任公司 | Mining method for gently inclined thick and large ore body |
| 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 |
| CN112031769A (en) * | 2020-09-09 | 2020-12-04 | 中钢集团马鞍山矿山研究总院股份有限公司 | Structure arrangement for multi-stope synchronous mining of steeply inclined thick and large ore body with stable ore rock |
| CN112031770A (en) * | 2020-09-11 | 2020-12-04 | 中钢集团马鞍山矿山研究总院股份有限公司 | Novel mining method suitable for multi-stope synchronous mining of thick and large ore body |
| CN112324438A (en) * | 2020-11-16 | 2021-02-05 | 抚顺罕王傲牛矿业股份有限公司 | Method for stoping corner ore body |
| CN113324881A (en) * | 2021-06-01 | 2021-08-31 | 辽宁科技大学 | Experimental device and method for measuring material motion characteristics of ore storage section of chute |
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|---|---|---|---|---|
| CN111764903A (en) * | 2020-06-30 | 2020-10-13 | 贵州开磷有限责任公司 | Mining method for gently inclined thick and large ore body |
| 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 |
| CN112031769A (en) * | 2020-09-09 | 2020-12-04 | 中钢集团马鞍山矿山研究总院股份有限公司 | Structure arrangement for multi-stope synchronous mining of steeply inclined thick and large ore body with stable ore rock |
| CN112031770A (en) * | 2020-09-11 | 2020-12-04 | 中钢集团马鞍山矿山研究总院股份有限公司 | Novel mining method suitable for multi-stope synchronous mining of thick and large ore body |
| CN112324438A (en) * | 2020-11-16 | 2021-02-05 | 抚顺罕王傲牛矿业股份有限公司 | Method for stoping corner ore body |
| CN113324881A (en) * | 2021-06-01 | 2021-08-31 | 辽宁科技大学 | Experimental device and method for measuring material motion characteristics of ore storage section of chute |
| CN113324881B (en) * | 2021-06-01 | 2023-07-21 | 辽宁科技大学 | Experimental device and method for determining motion characteristics of materials in ore storage section of ore pass |
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