CN103104259A - Inclination fragmentation ore body segment top board reconstruction middle-deep hole ore break down filling mining method - Google Patents
Inclination fragmentation ore body segment top board reconstruction middle-deep hole ore break down filling mining method Download PDFInfo
- Publication number
- CN103104259A CN103104259A CN2013100524799A CN201310052479A CN103104259A CN 103104259 A CN103104259 A CN 103104259A CN 2013100524799 A CN2013100524799 A CN 2013100524799A CN 201310052479 A CN201310052479 A CN 201310052479A CN 103104259 A CN103104259 A CN 103104259A
- Authority
- CN
- China
- Prior art keywords
- ore
- segmentation
- ore body
- top board
- segment
- 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
Images
Landscapes
- Drilling And Exploitation, And Mining Machines And Methods (AREA)
Abstract
The invention discloses an inclination fragmentation ore body segment top board reconstruction middle-deep hole ore break down filling mining method. According to the method, an intermediate section on an ore body direction is divided into several backstopping units; an intermediate section transport tunnel is arranged at the bottom of the intermediate section, a segment transport gallery is arranged in the segment; the segment transport gallery is connected to the intermediate section transport tunnel through a winze, the segment transport gallery is communicated to a stope; a slip-casting cavern chamber along the ore body direction is excavated at the contact position of each segment top ore body and the surrounding rocks; the fragmented surrounding rocks can be performed with slip-casting and reinforcing in the slip-casting cavern chamber to construct an artificial top board; the ore break down by blasting is carried out on a rock drilling platform under the artificial top board, the blasted ore is sent to a well, and is transported through the intermediate section transport gallery; lower layer segment backstopping is finished and then filling is carried out, and the artificial top board of the layer is taken as a base plate of an upper layer segment for backstopping work of the upper layer segment. The mining method is adapted to exploitation of fragmented inclination ore body, and has the characteristics of high production efficiency, strong security of the backstopping work, excellent index of ore dilution and good economic benefit.
Description
Technical field
The present invention relates to a kind of mining methods, particularly relate to a kind of inclination breaking ore body segmentation top board and reproduce the medium-length hole ore deposit method of mining by the way of filling that falls, be applicable to the exploitation of underground metal mine medium dip ore body.
Background technology
For upper armor rock or all exploitations of very broken inclined orebody of upper lower burrs country rock, in the situation that do not allow the earth's surface avalanche, the filling method that is representative to stratified filling method below main the employing is at present carried out.But these class mining methods are due to the restriction of layer height, and process for stoping is complicated, adopt, it is high to fill cost, and it is poor that filling connects the top, so the mine exists mining efficiency to hang down and the large problem of potential safety hazard.This method is in order to safeguard the stability of the upper and lower dish of ore body and stope top board simultaneously, need stay a large amount of ore pillars in exploitation process, the explosion damage of these ore pillars (comprising studding, fore-set and foundation) owing to being subject to ground pressure breaking and mineral building back production, cause that the production efficiency that the later stage reclaims is lower, safety is poorer, cost is higher, the ore resource loss amount is larger.
Summary of the invention
Technical problem to be solved by this invention be to dish or upper and lower armor rock on a class all very broken inclined orebody provide a kind of safe, the breaking ore body segmentation top board that tilts reproduces the medium-length hole ore deposit method of mining by the way of filling that falls efficiently.
In order to solve the problems of the technologies described above, the technical solution adopted in the present invention is: mineral building adopts without ore pillar structure (mineral building is not namely divided the mineral building ore pillar), with the ore body division stage casing, each stage casing is divided into segmentation along thickness, the stage casing is divided into some back production unit on orebody trend; The segmentation haulage way is arranged in lower disposed layout level haulage tunnel in the stage casing in segmentation; The segmentation haulage way is connected with the level haulage tunnel by drop shaft, and the segmentation haulage way is by ore removal route and stope communication; Dig the slip casting chamber along orebody trend in each segmentation top ore body and country rock contact position; Coil breaking surrounding rock on slip casting chamber grouting and reinforcing, construct artificial roof; The downward parallel medium-length hole of rock drilling platform under artificial roof cutter carries out the explosion ore deposit that falls; Scraper enters stope by the ore removal route broken ore is transported to drop shaft through the segmentation haulage way, sends by the level haulage gallery; Carry out filling after lower floor's substoping is complete, and begin the stoping operation of upper strata segmentation as the base plate of upper strata segmentation with the artificial roof of this layer.
The stage casing thickness of ore body division is 50～70m, and each stage casing is divided into the segmentation of thickness 15～25m, described stage casing is divided into some continuous stopings unit of 50～100m on orebody trend.
The spacing of segmentation ore removal route is 15～20m; It is ore body to ore body one side back production one layer height 3.5～4.2m that the slip casting chamber is constructed, and construct the artificial roof of 0.8～1.2m thickness at this layer top, cut a hole inlet well in country rock in the slip casting chamber, carry out grouting and reinforcing, to the zone of local rock crusher, add anchor pole or anchor cable is further reinforced.
Explosion fall the concrete grammar in ore deposit be mode take medium-length hole blasting at segmenting unit one side end height of formation as height of lift, the cutting vertical-horizontal groove of width 3m, then take cutting vertical-horizontal groove as the scope of freedom, at the downward parallel medium-length hole of rock drilling platform cutter, carry out the explosion ore deposit that falls, ore caving interval 4.5～5.5m.
Carry out filling after substoping is complete, adopt down-hole pressurization pumping equipment filler to be sent into the segmentation of back production.
Because there is not mutual interference mutually in the operation of the segmentation of filling lower floor and structure upper strata segmentation artificial roof and upwards armor rock slip casting, therefore these two kinds of work of up and down segmentation can be carried out saving time simultaneously.After the lower floor sublevel fill stoping finishes, can be with the artificial roof of this layer base plate as the upper strata segmentation, and the stoping operation that begins the upper strata segmentation.
The invention has the beneficial effects as follows: by the structure artificial roof, the artificial roof of lower one deck segmentation is as the base plate of upper strata segmentation, and formed together a working space that mechanical property is good with the top board that reproduces, scraper can directly enter ore drawing in stope, ore removal efficient is high, but the stability of effective guarantee stope top board; Can effectively reinforce upper dish breaking surrounding rock by slip casting, for rock drilling and ore removal work provide safe working space; Height of lift can reach 15～25m, by medium-length hole blasting and pumped downhole filling, can significantly improve the shortcoming that traditional batch filling method efficient is low, cost is high; To parallel medium-length hole, rock penetration performance is high, job safety, ore explosion lumpiness are even under cutter on the rock drilling platform under safe top board; Adopt the flat ore removal of scraper under safe top board, ore removal efficient is high; Adopt filling method effectively to control ore limits, significantly improved ore recovery ratio and reduced loss late.
In sum, the present invention has that production efficiency is high, stoping operation high safety, excellent, the good in economic efficiency characteristics of the poor damage index of ore, to upper dish or upper lower burrs country rock all broken inclined orebody be a kind of effective mining methods.
Description of drawings
Fig. 1 is the elevation of mining methods of the present invention.
Fig. 2 is the top view of mining methods of the present invention.
Fig. 3 is the lateral view of mining methods of the present invention.
In figure: 1-level haulage tunnel; 2-ore removal route; The 3-obturation; The 4-artificial roof; The 5-broken ore; The 6-medium-length hole; The 7-ore body; 8-slip casting chamber; 9-rock drilling platform; 10-segmentation haulage way; The 11-joint fissure; The 12-inlet well; The 13-drop shaft; The 14-connecting taxiway.
The specific embodiment
The invention will be further described with reference to the accompanying drawings and in conjunction with the specific embodiment for the below, and this example only makes an explanation to technical solution of the present invention as an example, protection domain is not limited.
(1) as shown in the figure, ore body is divided into the stage casing of height between 50～70m, the lower disposed level haulage tunnel 1 in each stage casing; Then again each stage casing is divided into the segmentation of height between 15～25m, and at each step-by-step arrangement segmentation haulage way 10, segmentation haulage way 10 is connected with level haulage tunnel 1 by drop shaft 13.Described stage casing being divided into this length of 50～100m(on orebody trend is determined by the intensity of artificial roof) some continuous stopings unit.
(2) segmentation haulage way 10 is linked up by ore removal route 2 and stope, and the distance of each segmentation ore removal route 2 is advisable with 15～20m.Dig the slip casting chamber 8 along orebody trend in each segmentation top ore body and country rock contact position.
(3) as shown in the figure, one side back production one layer height is the ore body of about 4m from slip casting chamber 8 to ore body, and constructs the artificial roof 4 of 1m left and right thickness at this layer top, and forms rock drilling platform 9; Simultaneously, carry out grouting and reinforcing at slip casting chamber 8 cutter inlet well 12 in the country rock.
(4) at this segmenting unit one side end cutting vertical-horizontal groove, form in the mode of medium-length hole blasting, be highly height of lift, width is the 3m left and right; After cutting vertical-horizontal groove forms, take cutting vertical-horizontal groove as the scope of freedom, carry out the explosion ore deposit that falls to parallel medium-length hole 6 under rock drilling platform 9 cutter, ore caving interval 5m left and right.
(5) adopt scraper to enter stope by ore removal route 2 broken ore 5 is transported to drop shaft 13 through segmentation haulage way 10, ore 5 can be sent by level haulage gallery 1 through drop shaft 13.
(6) each substoping unit back production is carried out packing job after complete.In order to guarantee that filling connects the requirement of strength of top and obturation, can adopt down-hole pressurization pumping equipment the high dense fill material to be sent into the segmentation of back production during filling.
(7) after lower floor's sublevel fill stoping finishes, namely can be with the artificial roof of this layer base plate as the upper strata segmentation, the stoping operation that then carries out the upper strata segmentation on this base plate.
Claims (5)
1. an inclination breaking ore body segmentation top board reproduces the medium-length hole ore deposit method of mining by the way of filling that falls, and it is characterized in that: mineral building adopts without the ore pillar structure, and with the ore body division stage casing, each stage casing is divided into segmentation along thickness, the stage casing is divided into some back production unit on orebody trend; The segmentation haulage way is arranged in lower disposed layout level haulage tunnel in the stage casing in segmentation; The segmentation haulage way is connected with the level haulage tunnel by drop shaft, and the segmentation haulage way is by ore removal route and stope communication; Dig the slip casting chamber along orebody trend in each segmentation top ore body and country rock contact position; Coil breaking surrounding rock on slip casting chamber grouting and reinforcing, construct artificial roof; The downward parallel medium-length hole of rock drilling platform under artificial roof cutter carries out the explosion ore deposit that falls; Scraper enters stope by the ore removal route broken ore is transported to drop shaft through the segmentation haulage way, sends by the level haulage gallery; Carry out filling after lower floor's substoping is complete, and begin the stoping operation of upper strata segmentation as the base plate of upper strata segmentation with the artificial roof of this layer.
2. inclination breaking ore body segmentation top board according to claim 1 reproduces the medium-length hole ore deposit method of mining by the way of filling that falls, it is characterized in that: the stage casing thickness of ore body division is 50～70m, each stage casing is divided into the segmentation of thickness 15～25m, described stage casing is divided into some continuous stopings unit of 50～100m on orebody trend.
3. inclination breaking ore body segmentation top board according to claim 2 reproduces the medium-length hole ore deposit method of mining by the way of filling that falls, and it is characterized in that: the spacing of segmentation ore removal route is 15～20m; It is ore body to ore body one side back production one layer height 3.5～4.2m that the slip casting chamber is constructed, and construct the artificial roof of 0.8～1.2m thickness at this layer top, cut a hole inlet well in country rock in the slip casting chamber, carry out grouting and reinforcing, to the zone of local rock crusher, add anchor pole or anchor cable is further reinforced.
4. inclination breaking ore body segmentation top board according to claim 2 reproduces the medium-length hole ore deposit method of mining by the way of filling that falls, it is characterized in that: explosion fall the concrete grammar in ore deposit be mode take medium-length hole blasting at segmenting unit one side end height of formation as height of lift, the cutting vertical-horizontal groove of width 3m, again take cutting vertical-horizontal groove as the scope of freedom, at the downward parallel medium-length hole of rock drilling platform cutter, carry out the explosion ore deposit that falls, ore caving interval 4.5～5.5m.
5. inclination breaking ore body segmentation top board according to claim 2 reproduces the medium-length hole ore deposit method of mining by the way of filling that falls, and it is characterized in that: carry out filling after substoping is complete, adopt down-hole pressurization pumping equipment filler to be sent into the segmentation of back production.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2013100524799A CN103104259A (en) | 2013-02-18 | 2013-02-18 | Inclination fragmentation ore body segment top board reconstruction middle-deep hole ore break down filling mining method |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2013100524799A CN103104259A (en) | 2013-02-18 | 2013-02-18 | Inclination fragmentation ore body segment top board reconstruction middle-deep hole ore break down filling mining method |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN103104259A true CN103104259A (en) | 2013-05-15 |
Family
ID=48312424
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN2013100524799A Pending CN103104259A (en) | 2013-02-18 | 2013-02-18 | Inclination fragmentation ore body segment top board reconstruction middle-deep hole ore break down filling mining method |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN103104259A (en) |
Cited By (16)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103437766A (en) * | 2013-09-03 | 2013-12-11 | 北京矿冶研究总院 | In-situ fragmentation mining method |
| CN103437768A (en) * | 2013-09-09 | 2013-12-11 | 中南大学 | Pre-set space filling mining method without top column and bottom column |
| CN104179505A (en) * | 2014-02-12 | 2014-12-03 | 云南磷化集团有限公司 | Phosphorus ore underground mining method |
| CN104453901A (en) * | 2014-12-08 | 2015-03-25 | 广西大学 | Sublevel open-stoping mining method with subsequent backfilling for long-hole caving in thin ore bodies |
| CN104612692A (en) * | 2014-12-11 | 2015-05-13 | 中南大学 | Following-forming continuous-filling mining method for segmented ore-caving bottom structure |
| CN104989402A (en) * | 2015-05-27 | 2015-10-21 | 广东省冶金建筑设计研究院 | Medium-deep hole room pillar mining method for limestone underground mine mining |
| CN107013228A (en) * | 2017-05-07 | 2017-08-04 | 中铁十八局集团有限公司 | A kind of large cross-section tunnel water burst is dashed forward mud rear arch top Rock Surrounding The Cavity reconstruction method |
| CN107989614A (en) * | 2017-12-06 | 2018-05-04 | 昆明冶金高等专科学校 | The mining methods of the inclined thick ore body of disk rock crusher in a kind of back production |
| CN111550248A (en) * | 2020-05-20 | 2020-08-18 | 长沙矿山研究院有限责任公司 | Pre-roof-protecting sublevel open-stoping subsequent filling mining method |
| CN112177612A (en) * | 2020-11-10 | 2021-01-05 | 长沙矿山研究院有限责任公司 | Downward high-layering cemented filling mining method |
| CN113775339A (en) * | 2021-11-12 | 2021-12-10 | 矿冶科技集团有限公司 | Mining method for broken ore body under condition of hanging wall broken surrounding rock |
| CN113931630A (en) * | 2021-12-17 | 2022-01-14 | 北京科技大学 | Mechanized non-waste mining method for deep metal deposit |
| CN114810078A (en) * | 2022-04-08 | 2022-07-29 | 紫金矿业集团股份有限公司 | Reconstruction method for environment of broken upper and lower plates of 360-degree annular deep hole grouting stope |
| CN115163070A (en) * | 2022-06-14 | 2022-10-11 | 山东黄金矿业(莱州)有限公司三山岛金矿 | Downward mining method suitable for steeply inclined thin ore body |
| CN115324581A (en) * | 2022-07-06 | 2022-11-11 | 山东黄金矿业(莱州)有限公司三山岛金矿 | Mining method for high-stress medium-thickness crushed ore body |
| CN117905464A (en) * | 2024-03-04 | 2024-04-19 | 核工业北京化工冶金研究院 | Method for sectionally and continuously mining steeply-inclined broken ore body |
Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102168579A (en) * | 2011-04-15 | 2011-08-31 | 中南大学 | Rib-pillar-free continuous sublevel filling method for mining preparation in medium-thickness slope crushed ore body vein |
| CN102606159A (en) * | 2012-03-26 | 2012-07-25 | 中南大学 | Medium thick heavy-pitch crushed ore body frame type artificial top downward segmenting cemented filling method |
| CN102619515A (en) * | 2012-04-26 | 2012-08-01 | 鞍钢集团矿业公司 | Top-filled high-end-wall pillarless sublevel caving method extraction technique |
| CN102635356A (en) * | 2012-04-26 | 2012-08-15 | 中南大学 | Medium-length hole mining method in multiple blasting free faces of high dipping thin veins |
| CN102678122A (en) * | 2012-05-21 | 2012-09-19 | 山东黄金矿业(莱州)有限公司三山岛金矿 | Improved inlet-route stoping method for large, thick and cracked ores under scattered body through top and bottom column |
-
2013
- 2013-02-18 CN CN2013100524799A patent/CN103104259A/en active Pending
Patent Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102168579A (en) * | 2011-04-15 | 2011-08-31 | 中南大学 | Rib-pillar-free continuous sublevel filling method for mining preparation in medium-thickness slope crushed ore body vein |
| CN102606159A (en) * | 2012-03-26 | 2012-07-25 | 中南大学 | Medium thick heavy-pitch crushed ore body frame type artificial top downward segmenting cemented filling method |
| CN102619515A (en) * | 2012-04-26 | 2012-08-01 | 鞍钢集团矿业公司 | Top-filled high-end-wall pillarless sublevel caving method extraction technique |
| CN102635356A (en) * | 2012-04-26 | 2012-08-15 | 中南大学 | Medium-length hole mining method in multiple blasting free faces of high dipping thin veins |
| CN102678122A (en) * | 2012-05-21 | 2012-09-19 | 山东黄金矿业(莱州)有限公司三山岛金矿 | Improved inlet-route stoping method for large, thick and cracked ores under scattered body through top and bottom column |
Cited By (26)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103437766A (en) * | 2013-09-03 | 2013-12-11 | 北京矿冶研究总院 | In-situ fragmentation mining method |
| CN103437766B (en) * | 2013-09-03 | 2016-03-30 | 北京矿冶研究总院 | In-situ fragmentation mining method |
| CN103437768A (en) * | 2013-09-09 | 2013-12-11 | 中南大学 | Pre-set space filling mining method without top column and bottom column |
| CN104179505A (en) * | 2014-02-12 | 2014-12-03 | 云南磷化集团有限公司 | Phosphorus ore underground mining method |
| CN104179505B (en) * | 2014-02-12 | 2016-01-20 | 云南磷化集团有限公司 | A kind of underground mining method of phosphorus ore |
| CN104453901A (en) * | 2014-12-08 | 2015-03-25 | 广西大学 | Sublevel open-stoping mining method with subsequent backfilling for long-hole caving in thin ore bodies |
| CN104612692A (en) * | 2014-12-11 | 2015-05-13 | 中南大学 | Following-forming continuous-filling mining method for segmented ore-caving bottom structure |
| CN104612692B (en) * | 2014-12-11 | 2016-07-27 | 中南大学 | Formation continuous filling mining method followed by segmentation ore caving polycrystalline substance |
| CN104989402A (en) * | 2015-05-27 | 2015-10-21 | 广东省冶金建筑设计研究院 | Medium-deep hole room pillar mining method for limestone underground mine mining |
| CN107013228A (en) * | 2017-05-07 | 2017-08-04 | 中铁十八局集团有限公司 | A kind of large cross-section tunnel water burst is dashed forward mud rear arch top Rock Surrounding The Cavity reconstruction method |
| CN107013228B (en) * | 2017-05-07 | 2019-03-05 | 中铁十八局集团有限公司 | A kind of prominent mud rear arch top Rock Surrounding The Cavity reconstruction method of large cross-section tunnel water burst |
| CN107989614A (en) * | 2017-12-06 | 2018-05-04 | 昆明冶金高等专科学校 | The mining methods of the inclined thick ore body of disk rock crusher in a kind of back production |
| CN111550248A (en) * | 2020-05-20 | 2020-08-18 | 长沙矿山研究院有限责任公司 | Pre-roof-protecting sublevel open-stoping subsequent filling mining method |
| CN111550248B (en) * | 2020-05-20 | 2021-06-01 | 长沙矿山研究院有限责任公司 | Pre-roof-protecting sublevel open-stoping subsequent filling mining method |
| CN112177612A (en) * | 2020-11-10 | 2021-01-05 | 长沙矿山研究院有限责任公司 | Downward high-layering cemented filling mining method |
| CN112177612B (en) * | 2020-11-10 | 2021-08-10 | 长沙矿山研究院有限责任公司 | Downward high-layering cemented filling mining method |
| CN113775339B (en) * | 2021-11-12 | 2022-03-11 | 矿冶科技集团有限公司 | Mining method for broken ore body under condition of hanging wall broken surrounding rock |
| CN113775339A (en) * | 2021-11-12 | 2021-12-10 | 矿冶科技集团有限公司 | Mining method for broken ore body under condition of hanging wall broken surrounding rock |
| CN113931630A (en) * | 2021-12-17 | 2022-01-14 | 北京科技大学 | Mechanized non-waste mining method for deep metal deposit |
| CN113931630B (en) * | 2021-12-17 | 2022-03-11 | 北京科技大学 | Mechanized non-waste mining method for deep metal deposit |
| CN114810078A (en) * | 2022-04-08 | 2022-07-29 | 紫金矿业集团股份有限公司 | Reconstruction method for environment of broken upper and lower plates of 360-degree annular deep hole grouting stope |
| CN115163070A (en) * | 2022-06-14 | 2022-10-11 | 山东黄金矿业(莱州)有限公司三山岛金矿 | Downward mining method suitable for steeply inclined thin ore body |
| CN115163070B (en) * | 2022-06-14 | 2024-03-12 | 山东黄金矿业(莱州)有限公司三山岛金矿 | Downward mining method suitable for steep thin ore body |
| CN115324581A (en) * | 2022-07-06 | 2022-11-11 | 山东黄金矿业(莱州)有限公司三山岛金矿 | Mining method for high-stress medium-thickness crushed ore body |
| CN117905464A (en) * | 2024-03-04 | 2024-04-19 | 核工业北京化工冶金研究院 | Method for sectionally and continuously mining steeply-inclined broken ore body |
| CN117905464B (en) * | 2024-03-04 | 2024-08-13 | 核工业北京化工冶金研究院 | Method for sectionally and continuously mining steeply-inclined broken ore body |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| CN103104259A (en) | Inclination fragmentation ore body segment top board reconstruction middle-deep hole ore break down filling mining method | |
| CN101338674B (en) | Non-pillar sublevel caving mining method for direct loading for ore | |
| CN102518438B (en) | Roof regeneration medium-length hole ore blast backfill mining method | |
| CN106761912B (en) | It is a kind of be suitable for unstable formation efficiently on to route slicing and filling mining methods | |
| CN102080518B (en) | Method for extracting gas from coal seam roof complex branched well | |
| CN103437769B (en) | Combination is reproduced structure medium-length hole ore blast and is worked in coordination with cable bolting afterwards filling mining method | |
| CN108612530A (en) | A kind of mining methods of upper disk rock crusher slant middle thick orebody | |
| CN104712358A (en) | Coal seam group with high gas content pressure relief and co-mining method based on gob-side entry retaining of working face of first mining total rock pressure relief | |
| CN104481543B (en) | Stage shrink caved stopes | |
| CN101881169A (en) | Sublevel shrinkage caving stage open stope afterwards filling mining method | |
| CN1982649A (en) | Mining method | |
| CN109236297B (en) | Coal mining method for remaining coal seam in residual mining area of cracking and filling combined ascending re-mining cutter column | |
| CN102392678A (en) | Gas drainage method combining surface and underground fracturing and permeability improvement | |
| AU2021106168A4 (en) | High-gas Coal Seam Group Pressure Relief Mining Method Based on Gob-side Entry Retaining in the First Mining Whole Rock Pressure Relief Working Face | |
| CN102953732A (en) | Room-and-pillar major-diameter longhole inverted-step-like segmented lateral caving subsequent filling mining method | |
| CN103498680B (en) | Improve the method for fully mechanized coal face period of beginning mining top-coal recovery rate | |
| CN105909247A (en) | Non-pillar sublevel mining cemented filling mining method | |
| CN102352769A (en) | Integrated mining method for commonly mining coal and gas of high mine | |
| CN105201506B (en) | The mining methods of afterwards filling are reinforced before a kind of heir | |
| CN102337919A (en) | Four-period-five-purpose hole-drilling high-efficiency gas extracting process | |
| CN104847355A (en) | Continuous mining method for hollow ground of medium-thickness steeply inclined ore body | |
| CN106761750B (en) | Slot type recovery method is built in the longwell plane milling of half-edge coal seam longitudinal direction | |
| CN105464700A (en) | Method for determining length of filling segment of fully mechanized mining and filling mixed mining working face | |
| CN104632220A (en) | Mining method with adjustable and controllable structure size of gentle dip medium-thickness ore body strip column reconstructed stope | |
| CN110714760B (en) | Mining method for coal-aluminum symbiotic layered induction collaborative mining |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C06 | Publication | ||
| PB01 | Publication | ||
| C10 | Entry into substantive examination | ||
| SE01 | Entry into force of request for substantive examination | ||
| C02 | Deemed withdrawal of patent application after publication (patent law 2001) | ||
| WD01 | Invention patent application deemed withdrawn after publication |
Application publication date: 20130515 |