CN111894668A - Top and bottom column one-time recycling method for constructing temporary supporting structure by cemented filling - Google Patents
Top and bottom column one-time recycling method for constructing temporary supporting structure by cemented filling Download PDFInfo
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- CN111894668A CN111894668A CN202010849285.1A CN202010849285A CN111894668A CN 111894668 A CN111894668 A CN 111894668A CN 202010849285 A CN202010849285 A CN 202010849285A CN 111894668 A CN111894668 A CN 111894668A
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- 238000000034 method Methods 0.000 title claims abstract description 32
- 238000004064 recycling Methods 0.000 title description 2
- 238000005422 blasting Methods 0.000 claims abstract description 18
- 238000005065 mining Methods 0.000 claims abstract description 16
- 238000011084 recovery Methods 0.000 claims abstract description 14
- 239000002360 explosive Substances 0.000 claims abstract description 5
- 230000003014 reinforcing effect Effects 0.000 claims abstract description 5
- 230000002787 reinforcement Effects 0.000 claims description 7
- 239000003795 chemical substances by application Substances 0.000 claims description 3
- 238000013517 stratification Methods 0.000 claims description 3
- 238000004901 spalling Methods 0.000 abstract 1
- 238000000605 extraction Methods 0.000 description 5
- 238000004519 manufacturing process Methods 0.000 description 3
- 239000002184 metal Substances 0.000 description 3
- 239000004571 lime Substances 0.000 description 2
- 239000004576 sand Substances 0.000 description 2
- 230000000694 effects Effects 0.000 description 1
- 238000005516 engineering process Methods 0.000 description 1
- 230000007613 environmental effect Effects 0.000 description 1
- 229910052500 inorganic mineral Inorganic materials 0.000 description 1
- 239000000463 material Substances 0.000 description 1
- 239000011707 mineral Substances 0.000 description 1
- 239000002699 waste material Substances 0.000 description 1
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- E—FIXED CONSTRUCTIONS
- E21—EARTH OR ROCK DRILLING; MINING
- E21F—SAFETY DEVICES, TRANSPORT, FILLING-UP, RESCUE, VENTILATION, OR DRAINING IN OR OF MINES OR TUNNELS
- E21F15/00—Methods or devices for placing filling-up materials in underground workings
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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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- E—FIXED CONSTRUCTIONS
- E21—EARTH OR ROCK DRILLING; MINING
- E21F—SAFETY DEVICES, TRANSPORT, FILLING-UP, RESCUE, VENTILATION, OR DRAINING IN OR OF MINES OR TUNNELS
- E21F15/00—Methods or devices for placing filling-up materials in underground workings
- E21F15/02—Supporting means, e.g. shuttering, for filling-up materials
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- Mining & Mineral Resources (AREA)
- Life Sciences & Earth Sciences (AREA)
- Geochemistry & Mineralogy (AREA)
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- General Life Sciences & Earth Sciences (AREA)
- Environmental & Geological Engineering (AREA)
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Abstract
The invention provides a top-bottom column one-time recovery method for constructing a temporary supporting structure by cemented filling, which is used for grouting and reinforcing a filling body in a goaf; performing roadway type variable-layering-size mining, mining odd-numbered sublevel roadways of a first layer and cementing and filling with tailings when a filling body above a horizontal ore pillar reaches a preset strength, and then mining even-numbered sublevel roadways and cementing and filling with tailings by the same method; stoping a third layer, namely stoping odd-numbered sublevel roadways and performing cemented filling by using tailings; then extracting even number of lanes and filling the lanes with tailings without cementation; finally, a second layering is stoped, and the stoping method is the same as the third layering method; and in the charging blasting of the second and third layered even number strip roadways, stemming is stuffed into the bottoms of the blast holes, the hole spacing and the resistance line of the blast holes close to one side of the filling body are slightly smaller than those of the main blast holes, and the energy-collecting pipes and the explosives are combined for blasting. The invention recovers the residual horizontal ore pillar of the mine with simple stoping process and low cost, and avoids the damages of rib spalling and the like to the filling body caused by blasting vibration in the blasting process.
Description
Technical Field
The invention relates to the field of metal mine mining, in particular to a top-bottom column one-time recovery method for constructing a temporary supporting structure by cemented filling.
Background
Along with the shortage of mine resources and the national importance on mine safety production and environmental protection hidden dangers, more and more metal ores are mined by a filling mining method. And in the filling mining process, gradually filling the goaf with filling materials along with the advancing of a stope face. The mining method divides the ore block into two steps of stoping room and pillar, filling after stoping room, stoping pillar and filling. The filling mining method can ensure the safe production of a stope and effectively control the ground pressure activity.
However, when the metal mine widely adopts the filling mining technology, a large amount of horizontal ore pillars are permanently remained under the mine, the recovery of the horizontal ore pillars cannot be realized, the ore loss rate is increased, and a large amount of mineral resources are wasted.
In the existing horizontal pillar extraction method, pillars with certain thickness need to be reserved as roof plates of an extraction working face below according to the crushing degree of the pillars and the strength of an upper filling body, and tailings are cemented and filled after each layered extraction. However, this method has the following drawbacks: (1) the complete recovery of the horizontal pillar cannot be guaranteed; (2) after recovery, the tailings are used for cementing and filling, so that the filling cost is increased; (3) the filling body is easy to damage in the blasting process. Therefore, the popularization and the application of the horizontal pillar extraction method are greatly limited.
Disclosure of Invention
The invention aims to solve the technical problems that a large amount of residual horizontal ore pillars cannot be completely recovered in the mine filling mining process, the filling cost is high, and blasting vibration causes damage to a filling body, and provides a secondary mining method capable of recovering all the ore pillars at the lowest cost under the condition of safe operation, so that the resource recovery rate is improved, and the waste of the ore pillars is avoided.
In order to solve the technical problems, the invention adopts the following technical scheme:
the one-time recovery method of the top and bottom columns for constructing the temporary supporting structure by cemented filling comprises the following steps:
the first step is as follows: grouting reinforcement of goaf filling body
Grouting and reinforcing a filling body above the ore pillar, and injecting a cementing agent into the filling body to enable the strength of the filling body to reach 4 MPa; if the strength of the goaf filling body reaches 4MPa, grouting reinforcement is not needed;
the second step is that: roadway type variable-layering-size stoping
Performing roadway type variable-layering-size stoping according to the thickness of the residual ore pillars, and performing interval stoping from one end of the stope to the other end of the stope along the trend of the ore body according to the position of the stope where the ore pillars are located; after the filling body above the horizontal ore pillar reaches the preset strength, the first stratification is mined; cementing and filling tailings in the 1 st sublevel roadway of the first layer, stoping other odd sublevel roadways of the first layer at intervals by the same method, cementing and filling tailings after stoping, and so on until the last odd sublevel roadway is stoped and filled; then, alternately mining even number of lanes and cementing and filling with tailings according to the method until the first layer is completely mined and filled;
after the first layered cemented filling body reaches the preset strength, a third layer is mined; firstly, stoping odd-numbered sectional roadways, and cementing and filling with tailings after stoping; and then extracting even number of sectional roadways and filling the roadway with tailings in a non-cemented manner.
Finally, a second layering is stoped, the stoping method is the same as the third layering, and the odd number of lanes are stoped and then cemented and filled with tailings; then, performing stoping on the even number of the divided roadways, and then performing non-cemented filling by using tailings, and so on until all stoping and filling of ore pillars are completed;
the third step: filling body shock-absorbing protection wall
And (3) charging and blasting the second and third layered even number of lanes, filling stemming with a certain length into the bottom of each blast hole, enabling the hole spacing and the resistance line of the blast holes close to one side of the filling body to be slightly smaller than those of the main blast holes, and blasting by combining the energy-collecting pipes and the explosives.
The size of the section of the first layered sublevel roadway is 4m in width and 3m in height, and the size of the section of the third layered sublevel roadway is 6m in width and 6-7 m in height; because the total height of the common top-bottom column is 13-14 m, the section size of the second layered sublevel roadway is changed into 4m in width and 4m in height.
The method recovers the horizontal ore pillars remained in the mine with the simplest recovery process and the lowest production cost, avoids the damages of caving and the like to the filling body caused by blasting vibration in the blasting process, can safely recover all the ore pillars, improves the recovery rate to the maximum extent, reduces the filling cost and generates obvious economic benefit.
Drawings
FIG. 1 is a schematic illustration of a pillar roadway variable slice size mining of the present invention;
FIG. 2 is a schematic of the present invention for stoping and filling.
Detailed Description
The present invention will be further described with reference to specific examples, and specific embodiments of the present invention will be described in detail with reference to the examples.
A top-bottom column one-time recovery method for constructing a temporary support structure by cemented filling is shown in figure 1.
The first step is as follows: grouting reinforcement of goaf filling body
Grouting and reinforcing a filling body above the ore pillar, and injecting a cementing agent into the filling body to enable the strength of the filling body to reach 4 MPa; if the strength of the goaf filling body reaches 4MPa, grouting reinforcement is not needed.
The second step is that: roadway type variable-layering-size stoping
Performing roadway type variable-layering-size stoping according to the thickness of the residual ore pillars, and performing interval stoping from one end of the stope to the other end of the stope along the trend of the ore body according to the position of the stope where the ore pillars are located; after the filling body above the horizontal ore pillar reaches the preset strength, the first stratification is mined; the section size of a first layering stripe roadway is 4m in width and 3m in height, and the 1 st layering stripe roadway in the first layering is mined by using a sand-lime ratio of 1: 4, performing cemented filling on the tailings, and performing interval mining on other odd numbered roadways such as 3 rd, 5 th and 7 th roadways of the first layer by the same method, wherein the ratio of sand to ash is 1: 4, performing cemented filling on the tailings, and repeating the steps until the last 1 sectional roadway is completely filled. And then, other even numbered roadways such as 2 nd, 4 th and 6 th roadways are mined at intervals according to the method and cemented and filled with tailings until all the mining and filling of the first layer are finished.
After the first layered cemented filling body reaches the preset strength, a third layer is mined; the section size of the third layered and stripped roadway is 6m wide and 6-7 m high; firstly, stoping odd-numbered sectional roadways, and then carrying out stoping by using a sand-lime ratio of 1: 4, performing tailing cemented filling; and then extracting even number of sectional roadways and filling the roadway with tailings in a non-cemented manner.
And finally, stoping a second layer, wherein the stoping method is similar to that of the third layer, and because the total height of the common top-bottom column is 13-14 m, the section size of the second layer sectional roadway is changed into a sectional size of a sectional roadway with the width of 4m and the height of 4m, and the ratio of ash to sand is 1 after stoping of odd sectional roadways such as 1, 3 and 5: 4, performing tailing cemented filling; 2. and 4, performing non-cemented filling by using tailings after the recovery of the even-numbered sectional roadways such as 4, 6 and the like, and repeating the steps until all the ore pillars are completely recovered and filled. As shown in fig. 2.
The third step: filling body shock-absorbing protection wall
And (3) charging and blasting the even numbered roadways such as the 2 nd, 4 th and 6 th stratified roadways, filling stemming with a certain length into the bottom of each blast hole, slightly reducing the hole spacing and the resistance line of the blast holes close to one side of the filling body to be smaller than those of the main blast holes, and blasting by combining an energy-collecting tube and explosives.
The method comprises the following steps of firstly, grouting and reinforcing the filling body above the horizontal ore pillar, providing safe operation conditions for the extraction of the ore pillar, and realizing the safe recovery of the ore pillar; if the strength of the filling body at the upper part of the ore pillar reaches 4MPa, grouting reinforcement is not needed. Even numbered roadways such as 2 nd, 4 th and 6 th layered roadways in the second and third layers are filled by adopting tailings without cementation, so that the filling cost of mine enterprises is saved. The charging blasting adopts the manner that the bottom of a blast hole is stuffed with stemming, the hole distance and the resistance line of the blast hole close to one side of the filling body are slightly smaller than those of a main blast hole, and the blasting energy-gathering tube and the explosive blasting are combined, so that the damage of blasting vibration to the filling body can be reduced, and the caving of the filling body is avoided.
Claims (2)
1. The one-time recovery method of the top and bottom columns for constructing the temporary supporting structure by cemented filling is characterized by comprising the following steps of:
the first step is as follows: grouting reinforcement of goaf filling body
Grouting and reinforcing a filling body above the ore pillar, and injecting a cementing agent into the filling body to enable the strength of the filling body to reach 4 MPa; if the strength of the goaf filling body reaches 4MPa, grouting reinforcement is not needed;
the second step is that: roadway type variable-layering-size stoping
Performing roadway type variable-layering-size stoping according to the thickness of the residual ore pillars, and performing interval stoping from one end of the stope to the other end of the stope along the trend of the ore body according to the position of the stope where the ore pillars are located; after the filling body above the horizontal ore pillar reaches the preset strength, the first stratification is mined; the first layered odd-numbered sectional roadway is cemented and filled with tailings after being recovered; then, alternately mining even number of lanes and cementing and filling with tailings according to the method until the first layer is completely mined and filled;
after the first layered cemented filling body reaches the preset strength, a third layer is mined; firstly, stoping odd-numbered sectional roadways, and cementing and filling with tailings after stoping; and then extracting even number of sectional roadways and filling the roadway with tailings in a non-cemented manner.
Finally, a second layering is stoped, the stoping method is the same as the third layering, and the odd number of lanes are stoped and then cemented and filled with tailings; then, performing stoping on the even number of the divided roadways, and then performing non-cemented filling by using tailings, and so on until all stoping and filling of ore pillars are completed;
the third step: filling body shock-absorbing protection wall
And (3) charging and blasting the second and third layered even number of lanes, filling stemming with a certain length into the bottom of each blast hole, enabling the hole spacing and the resistance line of the blast holes close to one side of the filling body to be slightly smaller than those of the main blast holes, and blasting by combining the energy-collecting pipes and the explosives.
2. The one-time recovery method for the top-bottom column of the temporary support structure constructed by cemented filling according to claim 1, wherein the sectional dimension of the first layered sublevel roadway is 4m wide and 3m high, and the sectional dimension of the third layered sublevel roadway is 6m wide and 6-7 m high; the total height of the top-bottom column is 13-14 m, and the section size of the second layered and striped roadway is changed into 4m in width and 4m in height.
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202010849285.1A CN111894668B (en) | 2020-08-21 | 2020-08-21 | Top and bottom column one-time recycling method for constructing temporary supporting structure by cemented filling |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202010849285.1A CN111894668B (en) | 2020-08-21 | 2020-08-21 | Top and bottom column one-time recycling method for constructing temporary supporting structure by cemented filling |
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| Publication Number | Publication Date |
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| CN111894668A true CN111894668A (en) | 2020-11-06 |
| CN111894668B CN111894668B (en) | 2022-05-10 |
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Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101858217A (en) * | 2010-05-18 | 2010-10-13 | 中南大学 | House pillar changeable panel upward demix filling mining method |
| CN105041314A (en) * | 2015-06-13 | 2015-11-11 | 招金矿业股份有限公司大尹格庄金矿 | Method for united mining of deep subsequent stoping chamber and layered stoping jamb |
| CN107939399A (en) * | 2017-11-25 | 2018-04-20 | 彝良驰宏矿业有限公司 | A kind of more stage casings level pillar recovery method and into line structure under exploitation pattern at the same time |
| CN108868880A (en) * | 2018-06-27 | 2018-11-23 | 江西理工大学 | Mineral building for level pillar recycling fills structure, level pillar recovery method |
| CN110905510A (en) * | 2019-11-13 | 2020-03-24 | 铜陵有色金属集团股份有限公司 | Strip and block stoping method for horizontal ore pillar of metal ore body |
-
2020
- 2020-08-21 CN CN202010849285.1A patent/CN111894668B/en active Active
Patent Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101858217A (en) * | 2010-05-18 | 2010-10-13 | 中南大学 | House pillar changeable panel upward demix filling mining method |
| CN105041314A (en) * | 2015-06-13 | 2015-11-11 | 招金矿业股份有限公司大尹格庄金矿 | Method for united mining of deep subsequent stoping chamber and layered stoping jamb |
| CN107939399A (en) * | 2017-11-25 | 2018-04-20 | 彝良驰宏矿业有限公司 | A kind of more stage casings level pillar recovery method and into line structure under exploitation pattern at the same time |
| CN108868880A (en) * | 2018-06-27 | 2018-11-23 | 江西理工大学 | Mineral building for level pillar recycling fills structure, level pillar recovery method |
| CN110905510A (en) * | 2019-11-13 | 2020-03-24 | 铜陵有色金属集团股份有限公司 | Strip and block stoping method for horizontal ore pillar of metal ore body |
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