CN112502705A - Anti-collapse supporting method for ultra-broken thin ore shallow hole shrinkage stope - Google Patents
Anti-collapse supporting method for ultra-broken thin ore shallow hole shrinkage stope Download PDFInfo
- Publication number
- CN112502705A CN112502705A CN202011248819.1A CN202011248819A CN112502705A CN 112502705 A CN112502705 A CN 112502705A CN 202011248819 A CN202011248819 A CN 202011248819A CN 112502705 A CN112502705 A CN 112502705A
- Authority
- CN
- China
- Prior art keywords
- stope
- ore
- shaped steel
- embedded part
- shallow hole
- 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.)
- Pending
Links
- 238000000034 method Methods 0.000 title claims abstract description 33
- 229910000831 Steel Inorganic materials 0.000 claims abstract description 41
- 239000010959 steel Substances 0.000 claims abstract description 41
- 239000011435 rock Substances 0.000 claims abstract description 19
- 238000010276 construction Methods 0.000 claims abstract description 7
- 238000009527 percussion Methods 0.000 claims abstract description 5
- 210000003462 vein Anatomy 0.000 abstract description 2
- 238000005065 mining Methods 0.000 description 7
- 238000010790 dilution Methods 0.000 description 6
- 239000012895 dilution Substances 0.000 description 6
- 230000008901 benefit Effects 0.000 description 4
- 239000004579 marble Substances 0.000 description 4
- 239000002699 waste material Substances 0.000 description 3
- 238000004519 manufacturing process Methods 0.000 description 2
- 238000005520 cutting process Methods 0.000 description 1
- 238000010586 diagram Methods 0.000 description 1
- 239000010438 granite Substances 0.000 description 1
- 238000003754 machining Methods 0.000 description 1
Images
Classifications
-
- E—FIXED CONSTRUCTIONS
- E21—EARTH DRILLING; MINING
- E21C—MINING OR QUARRYING
- E21C41/00—Methods of underground or surface mining; Layouts therefor
- E21C41/16—Methods of underground mining; Layouts therefor
-
- E—FIXED CONSTRUCTIONS
- E21—EARTH DRILLING; MINING
- E21D—SHAFTS; TUNNELS; GALLERIES; LARGE UNDERGROUND CHAMBERS
- E21D11/00—Lining tunnels, galleries or other underground cavities, e.g. large underground chambers; Linings therefor; Making such linings in situ, e.g. by assembling
- E21D11/14—Lining predominantly with metal
Abstract
The invention relates to an anti-collapse supporting method for an extremely-broken thin ore shallow hole shrinkage stope, which comprises the following steps: processing an I-steel embedded part according to the width of a stope, so that the length of the I-steel = the actual space width of the stope plus the depth of the slotted holes of 2 embedded parts; secondly, according to the actual condition of the rock mass of the stope, construction is carried out by utilizing a small percussion drill; thirdly, the I-shaped steel embedded parts are distributed on the mined ore body, so that the distance between the upper, lower, left and right I-shaped steel embedded parts is 2.8-3.5 m multiplied by 2.8-3.5 m; fourthly, caving the undelivered ore body on the working face of the stope, and completely burying the I-shaped steel embedded part in the ore falling process; and fifthly, repeating the steps of the third step and the fourth step until the third step is stoped to the top pillar, carrying out concentrated ore drawing, and finally forming I-shaped steel supporting groups with the vertical and horizontal spacing of 3m multiplied by 3m on a stope. The invention has low cost, simple and flexible construction and simple supporting mode, is very suitable for the ore control of the fractured structure of the ore body, and the ore body is in a shape of a steeply inclined crushed thin vein and is a small mine with poor stability of the surrounding rocks of the upper and lower walls.
Description
Technical Field
The invention relates to the technical field of mining methods, in particular to an anti-collapse supporting method for an extremely-broken thin ore shallow hole shrinkage stope.
Background
At present, many small and medium-sized mine ore bodies are subjected to fracture structure ore control in China, the ore bodies are in a sharp-inclined crushing thin-vein shape, and the surrounding rocks of an upper and a lower tray are poor in stability. For the mine of the type, the most common mining method is a shallow hole shrinkage method, but when the shallow hole shrinkage method is adopted for centralized ore removal, the upper and lower trays are easy to collapse, so that the dilution is increased, even the dilution reaches 50-80%, and the mine benefit is seriously influenced. At present, when the problems are solved, a filling mining method is generally adopted to effectively prevent serious poverty loss caused by caving of an upper plate and a lower plate, but the filling method is high in cost which is about 1.5-1.8 times of the cost of a shallow hole reserving method, obviously, the method can completely solve the problems, but greatly improves the cost of a mine, and is not suitable for a mine with small profit.
Disclosure of Invention
The invention aims to solve the technical problem of providing an anti-collapse support method for an extremely-broken thin ore shallow hole shrinkage stope, which has the advantages of low cost, simple and flexible construction and simple support mode.
In order to solve the problems, the anti-collapse supporting method for the ultra-broken thin ore shallow hole shrinkage stope comprises the following steps:
processing an I-steel embedded part according to the width of a stope, so that the length of the I-steel = the actual space width of the stope plus the depth of the slotted holes of 2 embedded parts;
secondly, according to the actual condition of the rock mass of the stope, construction is carried out by utilizing a small percussion drill;
thirdly, the I-shaped steel embedded parts are distributed on the mined ore body, so that the distance between the upper, lower, left and right I-shaped steel embedded parts is 2.8-3.5 m multiplied by 2.8-3.5 m;
fourthly, caving the undelivered ore body on the working face of the stope, and completely burying the I-shaped steel embedded part in the ore falling process;
and fifthly, repeating the steps of the third step and the fourth step until the third step is stoped to the top pillar, carrying out concentrated ore drawing, and finally forming I-shaped steel supporting groups with the vertical and horizontal spacing of 3m multiplied by 3m on a stope.
The I-shaped steel embedded part in the process of the manufacturing method is 16-22 kg/m I-shaped steel, and the depth of the cut hole of the embedded part is 50-100 mm.
Compared with the prior art, the invention has the following advantages:
1. the top and bottom plates of the ultra-thin broken ore shallow hole shrinkage stope are supported by the aid of the embedded I-shaped steel cross braces, and collapse of the top and bottom plates during centralized ore removal is limited.
2. Through practical application, the method disclosed by the invention is adopted to support and support surrounding rocks of a stope, so that the surrounding rocks are prevented from collapsing, a window period is strived for centralized ore removal by a shallow hole reservation method, and the loss of ore removal and dilution is effectively solved.
3. The invention has low cost, simple and flexible construction and simple supporting mode, is very suitable for the ore control of the fractured structure of the ore body, and the ore body is in a shape of a steeply inclined crushed thin vein and is a small mine with poor stability of the surrounding rocks of the upper and lower walls.
Drawings
The following describes embodiments of the present invention in further detail with reference to the accompanying drawings.
FIG. 1 is a schematic diagram of the present invention.
FIG. 2 is a view A-A of the present invention.
In the figure: 1, embedding an I-shaped steel part; 2-mined ore body; 3-working face of stope; 4, cutting holes of the embedded parts; 5-not extracting ore body; and 6, surrounding rock of ore body.
Detailed Description
As shown in fig. 1-2, an anti-collapse supporting method for a shallow hole shrinkage stope of an extremely-broken thin ore comprises the following steps:
the method comprises the steps of machining an I-steel embedded part 1 according to the width of a stope, and enabling the length of the I-steel = the actual space width of the stope plus 4 depths of embedded part cut holes.
Wherein: the I-beam embedded part 1 is 16-22 kg/m I-beam, and the depth of an embedded part slotted hole 4 on the I-beam embedded part is 50-100 mm. The I-steel can be mine waste steel rail.
And according to the actual condition of the rock mass of the stope, the construction is carried out by utilizing a small percussion drill.
And thirdly, the I-shaped steel embedded parts 1 are arranged on the mined ore body 2, so that the distance between the upper, lower, left and right I-shaped steel embedded parts 1 is 2.8-3.5 m multiplied by 2.8-3.5 m.
And fourthly, caving the undeveloped ore body 5 on the stope working face 3, so that the I-shaped steel embedded part 1 is completely buried in the ore falling process.
Step five, step three to step four are repeated until stoping is conducted to the top pillar, concentrated ore drawing is conducted, and finally H-shaped steel supporting groups with the distance of 3m multiplied by 3m are formed in a stope, so that the ore body surrounding rock 6 is supported and supported, and the broken surrounding rock is prevented from caving.
The embodiment is specifically described by taking an inner cover certain mine enterprise as an example.
The ore belongs to an established mine and is mined by adopting a shallow hole shrinkage method, the 5 th middle section is mined at present, the mining depth is 230m, the ore body is positioned at the contact part of silicified marble and granite and close to one side of the silicified marble, the average thickness of the ore body is 1m, and the inclination angle is 65-70 degrees. Because the hanging wall silicified marble rock has poor stability and is broken, the dilution rate formed by the mixing of hanging wall surrounding rocks during mining by adopting a shallow hole shrinkage method reaches 80 percent, and great damage is brought to stable production of mines.
Firstly, according to the actual situation of a mine, selecting waste mine I-steel, processing the waste mine I-steel into an I-steel embedded part 1, wherein the mine adopts 22kg/m I-steel, and works according to the actual width of a stope of 0.8-1.3 m. After each circulation of the work is completed, measuring the width of the stope at the embedded position, and driving down an I-steel embedded part 1 underground after actual data is obtained, wherein the length of the I-steel embedded part 1 is = the actual space width of the stope plus 4 depths of embedded part cut holes; the depth of a mine embedded part cut hole 4 is 150mm, the mine is constructed by utilizing the self small percussion drill of the mine, then the mine is embedded on the mined ore body 2, and the distance between the embedded parts is 3m multiplied by 3 m; then, caving the non-stoped ore body 5 on the working face 3 of the stope, and completely submerging the I-steel embedded part 1 in the ore falling; and then, circularly and repeatedly mining to the top pillar in sequence for centralized ore drawing, wherein ore bodies in a stope move downwards successively, the I-steel embedded parts 1 play a supporting role on ore body surrounding rocks 6, I-steel supporting groups with the distance of 3m multiplied by 3m are formed in the stope finally, the stope surrounding rocks are supported and supported, the surrounding rocks are prevented from caving, a window period is strived for centralized ore drawing by a shallow hole reservation method, and the ore drawing dilution loss is effectively solved.
The mine is implemented from 2017, the supporting method provided by the invention is adopted for effectively solving the problem that hanging wall silicified marble rock is poor in stability and broken, so that dilution caused by mixing of hanging wall surrounding rock is generated in mining by adopting a shallow hole shrinkage method, the cost of the method is improved compared with that of a common shallow hole shrinkage method, but the cost is relatively lower compared with that of a filling method, and good economic benefits are obtained.
Claims (2)
1. An anti-collapse supporting method for an extremely-broken thin ore shallow hole shrinkage stope comprises the following steps:
processing an I-shaped steel embedded part (1) according to the width of a stope, so that the length of the I-shaped steel = the actual space width of the stope plus the depth of 2 embedded part slotted holes (4);
secondly, according to the actual condition of the rock mass of the stope, construction is carried out by utilizing a small percussion drill;
thirdly, the I-shaped steel embedded parts (1) are arranged on the mined ore body (2), so that the distance between the upper, lower, left and right I-shaped steel embedded parts (1) is 2.8-3.5 m multiplied by 2.8-3.5 m;
fourthly, caving the undeveloped ore body (5) on a stope working face (3) to enable ore falling to completely submerge the I-shaped steel embedded part (1);
and fifthly, repeating the steps of the third step and the fourth step until the third step is stoped to the top pillar, carrying out concentrated ore drawing, and finally forming I-shaped steel supporting groups with the vertical and horizontal spacing of 3m multiplied by 3m on a stope.
2. The anti-collapse supporting method for the ultra-thin crushed ore shallow hole shrinkage stope according to claim 1, which is characterized in that: the I-shaped steel embedded part (1) in the process is I-shaped steel of 16-22 kg/m, and the depth of the embedded part cut hole (4) is 50-100 mm.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202011248819.1A CN112502705A (en) | 2020-11-10 | 2020-11-10 | Anti-collapse supporting method for ultra-broken thin ore shallow hole shrinkage stope |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202011248819.1A CN112502705A (en) | 2020-11-10 | 2020-11-10 | Anti-collapse supporting method for ultra-broken thin ore shallow hole shrinkage stope |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN112502705A true CN112502705A (en) | 2021-03-16 |
Family
ID=74957627
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202011248819.1A Pending CN112502705A (en) | 2020-11-10 | 2020-11-10 | Anti-collapse supporting method for ultra-broken thin ore shallow hole shrinkage stope |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN112502705A (en) |
Citations (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN105386766A (en) * | 2015-12-31 | 2016-03-09 | 西安建筑科技大学 | Reinforcement presplitting support method for extremely fractured hanging side roof mined by shallow hole ore leaving method |
| CN109630119A (en) * | 2018-11-16 | 2019-04-16 | 西北矿冶研究院 | Anti-collapse supporting method for ultra-broken thin ore shallow hole shrinkage stope |
-
2020
- 2020-11-10 CN CN202011248819.1A patent/CN112502705A/en active Pending
Patent Citations (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN105386766A (en) * | 2015-12-31 | 2016-03-09 | 西安建筑科技大学 | Reinforcement presplitting support method for extremely fractured hanging side roof mined by shallow hole ore leaving method |
| CN109630119A (en) * | 2018-11-16 | 2019-04-16 | 西北矿冶研究院 | Anti-collapse supporting method for ultra-broken thin ore shallow hole shrinkage stope |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| CN101338674B (en) | Non-pillar sublevel caving mining method for direct loading for ore | |
| CN106499395B (en) | The quick-fried power of shallow bore hole rock drilling-scraper cooperates with haulage Sublevel room mining | |
| CN106223956B (en) | Medium-length hole courtyard mining afterwards filling method | |
| CN109236297B (en) | Coal mining method for remaining coal seam in residual mining area of cracking and filling combined ascending re-mining cutter column | |
| CN103089267A (en) | Thin-ore-body shallow hole shrinkage method without sill pillar | |
| CN113700483B (en) | Multi-coal-seam impact mine pressure control method for ground drilling pressure relief | |
| CN111608630B (en) | Hydraulic fracturing underground construction method for high-level roof of coal seam group | |
| CN112983418A (en) | Method for hydraulic fracturing pressure relief of coal mine underground coal face withdrawal channel | |
| CN106640080A (en) | Deep part high-stress environment self-stabilizing arched stope arrangement mining method | |
| CN114293989B (en) | Anti-scour method for near-vertical ultra-thick coal seam subsection hydraulic fracturing area | |
| CN106939795B (en) | Thin bedrock high-seam working face large section cuts the method for protecting support of eye | |
| CN101737051A (en) | Covering layer forming method of blind ore bodies | |
| CN1195149C (en) | Roof bolt protection and sectioned empty field method for phosphorate rock mining | |
| RU2306417C2 (en) | Underground mineral mining method | |
| CN112502705A (en) | Anti-collapse supporting method for ultra-broken thin ore shallow hole shrinkage stope | |
| CN113847029B (en) | Surrounding column extraction method for underground mine high and large point column | |
| CN113107497B (en) | Hard rock tunnel tunneling construction method | |
| CN114382531A (en) | Method for accurately treating goaf through chamber and deep hole blasting | |
| CN114562267A (en) | Method for determining position of hydraulic fracturing crest line of pre-digging withdrawal channel | |
| CN114183142A (en) | Method for mining inclined and steeply inclined thin ore body | |
| CN111335900B (en) | High-strength anchoring and grouting self-tunneling method and system | |
| CN114382483A (en) | Method for preventing and controlling strong mine pressure of hard roof working face under left coal pillar | |
| CN114215530A (en) | Rapid roadway driving method for hard roof directional hydraulic fracturing gob-side roadway | |
| CN109882172B (en) | Gob-side entry retaining method by using cut-off direct roof as roadside support wall | |
| CN115030719A (en) | Method for preventing and controlling rock burst by combining hydraulic fracturing of thick and hard rock stratum with pressure relief of coal seam |
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 |