CN113494292B - High and large point column in-situ collapse recovery method - Google Patents
High and large point column in-situ collapse recovery method Download PDFInfo
- Publication number
- CN113494292B CN113494292B CN202110843524.7A CN202110843524A CN113494292B CN 113494292 B CN113494292 B CN 113494292B CN 202110843524 A CN202110843524 A CN 202110843524A CN 113494292 B CN113494292 B CN 113494292B
- Authority
- CN
- China
- Prior art keywords
- filling
- ore
- point column
- ore removal
- point
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Active
Links
- 238000000034 method Methods 0.000 title claims abstract description 27
- 238000011065 in-situ storage Methods 0.000 title claims abstract description 15
- 238000011084 recovery Methods 0.000 title abstract description 10
- 238000005520 cutting process Methods 0.000 claims abstract description 31
- 238000005065 mining Methods 0.000 claims abstract description 21
- 238000000605 extraction Methods 0.000 claims abstract description 12
- 239000011435 rock Substances 0.000 claims abstract description 9
- 238000005422 blasting Methods 0.000 claims abstract description 7
- 238000009423 ventilation Methods 0.000 claims description 6
- 230000000903 blocking effect Effects 0.000 claims description 3
- 238000004519 manufacturing process Methods 0.000 claims description 3
- 238000007789 sealing Methods 0.000 claims description 3
- 230000000149 penetrating effect Effects 0.000 claims 1
- 238000010276 construction Methods 0.000 abstract description 6
- 239000004567 concrete Substances 0.000 description 4
- 230000000694 effects Effects 0.000 description 2
- 239000011378 shotcrete Substances 0.000 description 2
- 239000002699 waste material Substances 0.000 description 2
- 238000004873 anchoring Methods 0.000 description 1
- 230000009286 beneficial effect Effects 0.000 description 1
- 238000005553 drilling Methods 0.000 description 1
- 230000008030 elimination Effects 0.000 description 1
- 238000003379 elimination reaction Methods 0.000 description 1
- 239000002184 metal Substances 0.000 description 1
- 238000005192 partition Methods 0.000 description 1
- 239000007921 spray Substances 0.000 description 1
Images
Classifications
-
- E—FIXED CONSTRUCTIONS
- E21—EARTH OR ROCK DRILLING; MINING
- E21C—MINING OR QUARRYING
- E21C41/00—Methods of underground or surface mining; Layouts therefor
- E21C41/16—Methods of underground mining; Layouts therefor
- E21C41/22—Methods of underground mining; Layouts therefor for ores, e.g. mining placers
-
- 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
- E21F1/00—Ventilation of mines or tunnels; Distribution of ventilating currents
- E21F1/006—Ventilation at the working face of galleries or tunnels
-
- 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
- E21F13/00—Transport specially adapted to underground conditions
- E21F13/06—Transport of mined material at or adjacent to the working face
-
- 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
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F42—AMMUNITION; BLASTING
- F42D—BLASTING
- F42D3/00—Particular applications of blasting techniques
Landscapes
- Engineering & Computer Science (AREA)
- Mining & Mineral Resources (AREA)
- Life Sciences & Earth Sciences (AREA)
- Geochemistry & Mineralogy (AREA)
- Geology (AREA)
- General Life Sciences & Earth Sciences (AREA)
- General Engineering & Computer Science (AREA)
- Environmental & Geological Engineering (AREA)
- Remote Sensing (AREA)
- Mechanical Engineering (AREA)
- Drilling And Exploitation, And Mining Machines And Methods (AREA)
Abstract
The invention discloses an in-situ collapsing and extracting method for a high and large point column. Filling a goaf twice, reserving an empty roof space when the goaf is filled for the first time, and constructing a filling retaining wall on a first filling body before the second filling is connected with the roof to form a personnel and equipment access passage; after the filling body reaches the design strength, a roof cutting space is formed at the upper part of the point column, a panel transportation lane, an ore removal approach and a cutting raise are constructed in the bottom plate rock mass, then a downward parallel medium-length hole blast hole is constructed around the cutting raise in the roof cutting space, the cutting raise is used as a free surface, millisecond differential blasting is adopted for ore caving, an ore removal funnel is formed at the bottom while ore is caving, the caving ore falls into the ore removal approach from the ore removal funnel, a scraper conveyor is adopted to cooperate with a mining truck for ore removal, and after the point column stoping is finished, the goaf is sealed or subjected to subsequent filling treatment. The method has high safety, low engineering construction difficulty, low cost, high extraction efficiency and high ore pillar recovery rate.
Description
Technical Field
The invention relates to the technical field of underground metal mine mining, in particular to an in-situ collapsing and stoping method for high and large point pillar ore bodies in mines mined by a comprehensive method and a room-pillar method.
Background
Mines mined by a comprehensive method and a room-pillar method usually leave a large number of pillar-point ore bodies for controlling ground pressure and ensuring operation safety, most pillar-point ore bodies have higher grade and higher economic value, and if the pillar-point ore bodies are reserved for a long time, resource waste is caused. The extraction of the point column has great technical and economic difficulty, and the current point column extraction technology mainly comprises the following steps: the method comprises a pillar cutting method, an extraction method, a concrete pillar replacement method, a full filling subsequent stoping method, a bagged filling body surrounding dead zone mining pillar method and an artificial false roadway partitioned filling stoping method. The recovery rate of the stope is low by adopting a pillar cutting method and an extraction method, and personnel and equipment enter the dead zone for operation, so that the safety is poor, and the recovery adaptability to high and large point pillars is poor; the concrete pillar replacement method firstly needs to construct an artificial concrete pillar, and then carries out the stoping of the pillar, the construction efficiency of the artificial concrete pillar is low, the cost is high, and personnel and equipment need to enter the dead zone operation; the artificial false roadway partition filling stoping method firstly builds the artificial false roadway in the goaf, fills the goaf and then carries out stoping of ore pillars. The method is applied in practice, but the recovery of the high-point pillar ore body has the problems of high safety risk, low efficiency, high cost and the like.
Disclosure of Invention
In order to solve the technical problems, the invention provides an in-situ collapsing and extracting method for a high and large point column, which comprises the following steps:
7, constructing downward parallel medium-length hole blast holes around the cutting raise in the top cutting space, taking the cutting raise as a free surface, and blasting once or repeatedly by millisecond differential to form an ore discharge funnel at the bottom while caving ore;
and 9, adopting a retreating type sequence to carry out stoping on the point columns in the panel area, and sealing or filling the goaf after stoping of all the point columns in the panel area is finished.
Preferably, when the empty area is filled for the first time, the height of the empty space is ensured to be 3-4 m; and when the empty area is filled for the second time, the top contact of filling is ensured.
Preferably, the first filling and the second filling require that the uniaxial compressive strength of the filling body is more than or equal to 1.0MPa in 28 days.
Further, the width of the personnel and equipment access passage is determined by combining personnel and equipment access and ventilation requirements.
Furthermore, during the top cutting operation in the step 4, a bar column or a point column is reserved for supporting the top plate, and the top plate is supported by adopting a gunite, an anchor rod and a hanging net, so that the operation safety of personnel is ensured.
Further, the arrangement depth of the panel transportation lane and the ore removal route in the bottom plate rock body in the step 5 is determined according to the form of the stoping point column and the design lean loss index.
Further, with the cutting raise as a center, the depth of the blast holes of the downward parallel medium-length holes in the step 7 is reduced row by row, and the specific depth of each downward parallel medium-length hole is determined according to the inclined plane inclination angle of the ore removal funnel and the natural repose angle of the ore.
Advantageous effects
Compared with the prior art and the method, the in-situ collapsing and extracting method for the high and large point column provided by the invention has the following beneficial effects:
(1) the recovery operation is safe. The goaf is completely filled and connected with the roof except for the personnel equipment access passage, so that the ground pressure activity caused by stoping of ore pillars is reduced; the panel transport lane and the ore removal route are positioned below the bottom plate of the ore pillar, so that the danger of ore removal of personnel and equipment in the dead zone is avoided; and strip columns or point columns are reserved on the cut top to support a top plate, and are supported in other modes such as spray anchoring and the like, when the raise is cut in the ore pillar, a raise drilling machine can be used for construction, and the safety in construction operation is greatly improved.
(2) The engineering construction difficulty is lower, and the recovery efficiency is high. The personnel and equipment access passage between the pillars is constructed by a filling retaining wall (the height is 3-4 m); the panel transport lane and the ore removal route are positioned below the bottom plate and covered with a filling body, and no dead zone influence exists in the construction process; the medium-length hole blasting takes the cutting raise as a free surface, a corresponding funnel ore removal structure is formed according to the hole depth, the stoping blasting process is easy to control, and the stoping efficiency is high.
(3) The ore recovery rate is high. The recovery rate index can reach more than 85 percent, the loss and waste of ore pillars are reduced, and the comprehensive cost of the stoping is low.
Drawings
The present invention will be described in further detail with reference to the accompanying drawings.
FIG. 1 is a front view of a typical scheme of the in-situ collapsing extraction method for a high and large point column of the present invention;
FIG. 2 is a schematic sectional view taken along line B-B in FIG. 1;
FIG. 3 is a schematic cross-sectional view taken along line C-C of FIG. 1;
FIG. 4 is a schematic cross-sectional view taken along line D-D of FIG. 1;
in the figure: 1-point column; 2-a filling body; 3-roof rock mass; 4-a baseplate rock mass; 5-cutting the raise; 6-downward parallel medium-length holes; 7-ore removal and access; 8-a bar; 9-anchor rod; 10-filling the retaining wall; 11-personnel equipment access.
Detailed Description
The technical solutions of the embodiments of the present invention will be described clearly and completely with reference to the accompanying drawings, and it is to be understood that the described embodiments are only a part of the embodiments of the present invention, and not all of the embodiments; all other embodiments, which can be derived by a person skilled in the art from the embodiments of the present invention without any inventive step, are within the scope of the present invention.
As shown in fig. 1-4, the in-situ collapsing extraction method for the high and large point column provided by the invention comprises the following steps:
and 2, according to the divided panel areas, blocking the entrances and exits on the periphery of the panel area to be stoped and filling the empty area for the first time, wherein the first filling requirement is not top contact, an upper empty top space is reserved, the height of the empty top space needs to meet the requirement of normal operation height of personnel and mining equipment, and preferably, the empty top height of the empty area is 3-4 m.
And 3, the 28-day uniaxial compressive strength of the filling body 2 required by the first filling is more than or equal to 1.0 MPa. After the strength of the filling body 2 filled for the first time reaches a design index, the top plate of the empty-top space is subjected to danger elimination, personnel equipment access routes and the width thereof are set in the panel area according to a planned stoping sequence, then filling retaining walls 10 are erected on the boundaries at the two sides of the personnel equipment access routes, the empty area is subjected to second filling and top connection, a space reserved on the inner sides of the retaining walls forms a personnel equipment access passage 11, and the width of the personnel equipment access passage 11 is determined by combining personnel and equipment access and ventilation requirements.
And 4, the 28-day uniaxial compressive strength of the filling body 2 required by the second filling is more than or equal to 1.0MPa, and after the strength of the filling body 2 of the second filling reaches a design index, the top cutting is carried out on the upper part of the point column 1 to be mined, so that a top cutting space is formed. When cutting the top, a bar column 8 or a point column is reserved for supporting the top plate, and the top plate is supported by adopting gunite, an anchor rod 9 and a hanging net so as to ensure the operation safety of personnel.
And 5, constructing a panel transportation lane in the panel bottom plate rock mass, and constructing a ore removal route 7 through the panel transportation lane, wherein the ore removal route 7 reaches the bottom plate position corresponding to the center of each point column 1. The arrangement depth of the panel transport lane and the ore removal route 7 in the bottom plate rock mass is determined according to the form and the design lean loss index of the stoping point column 1.
and 7, constructing downward parallel medium-length holes 6 around the cutting raise 5 in the top cutting space, taking the cutting raise 5 as a center, reducing the blast hole depth of the downward parallel medium-length holes 6 backward row by row, and determining the specific depth of each downward parallel medium-length hole 6 according to the inclined plane inclination angle of the ore removal funnel and the natural ore repose angle. And (3) taking the cutting raise 5 as a free surface, adopting millisecond differential blasting once or for times, and forming an ore removal funnel at the bottom while ore is collapsed.
and 9, adopting a backward type sequence to perform stoping on the point pillars 1 in the panel area, and sealing or filling the goaf after stoping of all the point pillars 1 in the panel area is finished.
The above description is only for the preferred embodiment of the present invention, but the scope of the present invention is not limited thereto, and any person skilled in the art should be considered to be within the technical scope of the present invention, and the technical solutions and the inventive concepts thereof according to the present invention should be equivalent or changed within the scope of the present invention.
Claims (7)
1. A high and large point column in-situ collapsing and extracting method is characterized by comprising the following steps:
step 1, dividing the point columns into panels according to mine production capacity, filling capacity, mining cycle, point column occurrence characteristics and project status, organizing mining operation according to the panels, and planning mining sequence among the point columns according to backward mining in the panels;
step 2, according to the divided panel areas, blocking the entrances and exits on the periphery of the panel areas and filling the empty areas for the first time, wherein empty top spaces are reserved according to the first filling requirement, and the height of the empty top spaces needs to meet the normal operation requirements of personnel and mining equipment;
step 3, after the strength of the filling body filled for the first time reaches a design index, danger is eliminated for a top plate of the empty-top space, personnel and equipment access routes are set in the panel area according to a planned stoping sequence, then filling retaining walls are erected on boundaries on two sides of the personnel and equipment access routes, the empty area is filled for the second time and is connected with the top, and a space reserved on the inner sides of the retaining walls forms personnel and equipment access channels;
step 4, after the strength of the filling body filled for the second time reaches the design index, performing topping on the upper part of the point column to be stoped to form a topping space;
step 5, constructing panel transportation lanes in panel bottom plate rock masses, and constructing ore removal access roads through the panel transportation lanes, wherein the ore removal access roads reach the bottom plate positions corresponding to the centers of all the points;
step 6, constructing a cut patio ore removal access path penetrating through the bottom and a roof cutting space at the upper part at the corresponding position of the center of the point pillar to form a stope ventilation loop;
7, constructing downward parallel medium-length holes around the cutting raise in the top cutting space, taking the cutting raise as a free surface, and blasting once or repeatedly by millisecond differential blasting to form an ore removal funnel at the bottom while caving ore;
step 8, falling the collapsed ore into an ore removal route from an ore removal funnel, and removing the ore by adopting a scraper conveyor in combination with a mining truck;
and 9, adopting a retreating type sequence to carry out stoping on the point columns in the panel area, and sealing or filling the goaf after stoping of all the point columns in the panel area is finished.
2. The method for in-situ collapsing and extracting the high and large point column according to claim 1, wherein: when the empty area is filled for the first time, the height of the empty space is ensured to be 3-4 m; and when the empty area is filled for the second time, the top contact of filling is ensured.
3. The high-large-point column in-situ collapsing extraction method according to claim 1, wherein: the first filling and the second filling require that the uniaxial compressive strength of the filling body is more than or equal to 1.0MPa in 28 days.
4. The high-large-point column in-situ collapsing extraction method according to claim 1, wherein: the width of the personnel and equipment access passage is determined by combining personnel and equipment access and ventilation requirements.
5. The high-large-point column in-situ collapsing extraction method according to claim 1, wherein: and (4) during top cutting operation in the step (4), reserving a bar column or a point column for supporting the top plate, and supporting the top plate by adopting a guniting method, an anchor rod and a hanging net so as to ensure the operation safety of personnel.
6. The high-large-point column in-situ collapsing extraction method according to claim 1, wherein: and 5, determining the arrangement depth of the panel transport lane and the ore removal route in the bottom plate rock mass according to the form and grade index of the stoping point column.
7. The high-large-point column in-situ collapsing extraction method according to claim 1, wherein: and (4) taking the cutting raise as a center, reducing the depth of blast holes of the downward parallel medium-length holes in the step (7) backward row by row, and determining the specific depth of each downward parallel medium-length hole according to the inclined plane inclination angle of the ore removal funnel and the natural ore repose angle.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202110843524.7A CN113494292B (en) | 2021-07-26 | 2021-07-26 | High and large point column in-situ collapse recovery method |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202110843524.7A CN113494292B (en) | 2021-07-26 | 2021-07-26 | High and large point column in-situ collapse recovery method |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN113494292A CN113494292A (en) | 2021-10-12 |
| CN113494292B true CN113494292B (en) | 2022-07-05 |
Family
ID=77996319
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202110843524.7A Active CN113494292B (en) | 2021-07-26 | 2021-07-26 | High and large point column in-situ collapse recovery method |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN113494292B (en) |
Families Citing this family (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN114086959B (en) * | 2021-11-16 | 2024-08-16 | 铜陵有色金属集团股份有限公司 | Large-diameter high-neck funnel bottom structure, construction method and stoping method |
| CN114856693B (en) * | 2022-04-19 | 2023-03-21 | 中南大学 | Filling and extracting method for point column ore body |
Family Cites Families (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN100441831C (en) * | 2003-12-11 | 2008-12-10 | 云南驰宏锌锗股份有限公司 | Ladder type mining method using united pillars to support roof and partition stope |
| CN105332733A (en) * | 2015-09-25 | 2016-02-17 | 山东科技大学 | Strip filling method of conventional mining face goaf pumping cementing materials |
| CN107178366B (en) * | 2017-07-28 | 2019-11-05 | 长沙矿山研究院有限责任公司 | A kind of stoping method of column ore body |
| CN108547618A (en) * | 2018-04-04 | 2018-09-18 | 长沙有色冶金设计研究院有限公司 | A kind of two steps mining methods leave the recovery process of studding |
| CN112267885A (en) * | 2020-11-16 | 2021-01-26 | 中国铝业股份有限公司 | Mining method for two-step strip-cutting stoping subsequent barren rock cemented filling |
-
2021
- 2021-07-26 CN CN202110843524.7A patent/CN113494292B/en active Active
Also Published As
| Publication number | Publication date |
|---|---|
| CN113494292A (en) | 2021-10-12 |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| CN108661646B (en) | False roof pillar type shrinkage and post filling mining method | |
| CN110259451B (en) | Pre-control roof efficient mining method for gently inclined medium-thickness ore body | |
| CN113494292B (en) | High and large point column in-situ collapse recovery method | |
| CN110331978B (en) | Environment reconstruction segmented medium-length hole subsequent filling mining method | |
| CN104806244A (en) | Filling mining method for slant middle-thick ore body | |
| CN110043263B (en) | Zone pre-control roof-based medium-deep hole reinforcement mining method for gently-inclined broken ore deposit | |
| CN104895566A (en) | Mining method with residual ore recovery function | |
| CN112682041B (en) | Filling mining method for broken and slowly-inclined thick and large ore body of upper disc | |
| CN109026005B (en) | Comprehensive mechanized ore-breaking layered caving mining method | |
| CN112177612B (en) | Downward high-layering cemented filling mining method | |
| CN111456729A (en) | Mining method of steeply inclined thin ore body | |
| CN111594170B (en) | Method for stoping residual ore body on top and bottom plates of gently inclined ore body | |
| CN111894591A (en) | Collaborative mining method for inclined thick and large ore body panel and panel interval column | |
| CN110219650B (en) | Deep hole subsequent filling mining method in environment reconstruction stage | |
| CN113356851B (en) | Continuous downward medium-length hole segmented open stoping subsequent filling mining method for medium-thickness ore body | |
| CN113847029B (en) | Surrounding column extraction method for underground mine high and large point column | |
| CN113482611B (en) | Mining method for alternately ascending continuous mining thick and large broken ore bodies | |
| CN111894667B (en) | Upward double-layered drift filling mining method for recoverable support shield of broken ore body | |
| CN103982185B (en) | Upright opening and lateral aperture work in coordination with the mechanization sublevel cut and fill method of back production | |
| CN115163074A (en) | Method for recovering top pillars and studs in sill-pillar-free shallow hole shrinkage and subsequent filling mining method | |
| CN115288684A (en) | Downward segmented filling mining method suitable for thick, large and broken ore bodies | |
| CN110905510B (en) | Strip and block stoping method for horizontal ore pillar of metal ore body | |
| CN114562266A (en) | Panel type cutting roadway two-step segmented open stope subsequent filling mining method | |
| CN113914863A (en) | Mechanical mining method of near-horizontal thin ore body intelligent heading machine | |
| CN113187481A (en) | Filling mining method for overburden rock concentrated grouting caving stoping |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| PB01 | Publication | ||
| PB01 | Publication | ||
| SE01 | Entry into force of request for substantive examination | ||
| SE01 | Entry into force of request for substantive examination | ||
| GR01 | Patent grant | ||
| GR01 | Patent grant |