CN106089206A - Middle small mine narrow strips exploits residual exploiting field partial stowage coal column method of replacing - Google Patents
Middle small mine narrow strips exploits residual exploiting field partial stowage coal column method of replacing Download PDFInfo
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- CN106089206A CN106089206A CN201610344565.0A CN201610344565A CN106089206A CN 106089206 A CN106089206 A CN 106089206A CN 201610344565 A CN201610344565 A CN 201610344565A CN 106089206 A CN106089206 A CN 106089206A
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- 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
- E21C41/18—Methods of underground mining; Layouts therefor for brown or hard coal
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- E—FIXED CONSTRUCTIONS
- E21—EARTH 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 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
- E21F15/005—Methods or devices for placing filling-up materials in underground workings characterised by the kind or composition of the backfilling material
Abstract
The invention discloses middle small mine narrow strips and exploit residual exploiting field partial stowage coal column method of replacing, comprise the following steps: form U-shaped ventilating system and prepare the residual exploiting field of residual stope filling material filling；When the residual exploiting field of filling, use from shifting crawler type filling system, with protrusive filling method or retrusive filling method, carry out filling to the mined out region of band, wherein, aforementioned protrusive filling method includes: the asynchronous mining type of protrusive filling retrusive coal column displacement, and aforementioned retrusive filling method includes: retrusive filling retrusive coal column displacement Synchronization mining mode, the asynchronous mining type of retrusive filling retrusive coal column displacement.The invention have benefit that: security is good, coal column replacement rate is high.
Description
Technical field
The present invention relates to a kind of residual exploiting field coal column method of replacing, be specifically related to small mine in one narrow
Striping noise residual exploiting field partial stowage coal column method of replacing, belongs to technical field of coal exploitation.
Background technology
" narrow strips " exploitation is that a kind of water conservation proposing based on shallow coal seam with thin bedrock exploitation is adopted
Coal method.In Striping noise design general Striping noise width all 30m-40m and more than,
The common recognition on the circle of mining at present is that more than 80m band is adopted wide referred to as great width stripe mining, is less than 30m
Band is adopted the wide narrow strips that is referred to as and is exploited, and the band between 30m-80m is adopted wide referred to as common band and opened
Adopt." narrow strips " exploitation is difficult to arrange working face fully according to the longwell system of standard, simply exists
For application under conditions of water conservation.The northern Shensi Yushenfu coalfield great development initial stage is in order to support local warp
The development of Ji, had once divided local mine mining area in some regions, and initial well type is very little, greatly
All use old room and pillar mining.In recent years through closing down illegal small coal mine, resource consolidation,
Developing into more than 0.3Mt/a, coal-mining method and is transformed.A portion ore deposit
Well is located in water conservation region, and buried depth is shallow, and coal seam thickness is big, and current extensively application is " narrow
Band " water-retaining production is as transitional recovery method.Mining system uses longwell to arrange, typically
" adopt 12 and the stay 8 " scheme of employing, i.e. often exploits 12m width band coal body, stays 8m width band coal
Post roof supporting and upper caldding layer, protect water-bearing layer, adopted about 10 band coal bodies simultaneously
After stay and set 20m width isolated coal pillar, this mining type working face recovery ratio is about 50%." narrow
Band " water-retaining production is as the cambic a kind of water retaining mining method of northern Shensi medium and small colliery, currently
The residual exploiting field being formed after exploitation does not all carry out filling second mining.Generally stay in view of residual exploiting field territory and to set
12m width strip coal pillar good stability, this just for the later stage in fund, particularly second mining technology can be filled
Carry out partial stowage's water-retaining production displacement strip coal pillar on the premise of code insurance card and laid solid
Basis.
The present invention is i.e. " to adopt 12 and stay 8 " after recovery scheme forms residual exploiting field for former employing, by filling
The one residual exploiting field partial stowage coal-mining method of embankment formula displacement strip coal pillar.
Content of the invention
It is an object of the invention to provide the residual exploiting field partial stowage of small mine narrow strips exploitation in one
Coal column method of replacing, this coal column method of replacing not only security is good, and coal column replacement rate is high.
In order to realize above-mentioned target, the present invention adopts the following technical scheme that:
In Yi Zhong, small mine narrow strips exploits residual exploiting field partial stowage coal column method of replacing, its feature
It is, comprise the following steps:
Step1, formation U-shaped ventilating system:
Exploit 10 bands, after having 10 strip coal pillars, stay and set an isolated coal pillar, use
Retrusive substitute mode replaces strip coal pillar, after the oxygen concentration in residual exploiting field territory reaches normal value,
From the beginning of isolated coal pillar, towards initial strip coal pillar direction, gradually close mined out banded zone
Two end portions, ultimately form a U-shaped ventilating system, fresh distinguished and admirable from haulage gate
Entering, after blowing over replaced strip coal pillar working face, dirty wind is back to return air along air return way
Big lane；
Step2, prepare residual stope filling material:
Using earth's surface aeolian sand as major ingredient, rubble or flyash as aggregate, cement as gluing
Agent, obtains compound, i.e. residual stope filling material after adding suitable quantity of water mixing；
Step3, the residual exploiting field of filling:
Use from moving crawler type filling system, with protrusive filling method or retrusive filling method,
Carry out filling to the mined out region of band, wherein, aforementioned protrusive filling method includes: protrusive
The asynchronous mining type of filling retrusive coal column displacement, aforementioned retrusive filling method includes: retreat
Formula filling retrusive coal column displacement Synchronization mining mode, the displacement of retrusive filling retrusive coal column are different
Step mining type.
Aforesaid method, it is characterised in that in Step1, the width of aforementioned straps is 12m,
The width of strip coal pillar is 8m, and the width of isolated coal pillar is 20m.
Aforesaid method, it is characterised in that in Step1, closes mined out banded zone two
During termination, brick structure brattice is used to close.
Aforesaid method, it is characterised in that in Step1, during displacement strip coal pillar,
After the 1st replaced extraction of row's strip coal pillar, by the 1st row's strip coal pillar and the 2nd row's strip coal pillar
Between brick structure brattice open, then exploit the 2nd row's strip coal pillar, by that analogy, persistently formed
Stable U-shaped ventilating system.
Aforesaid method, it is characterised in that in Step2, aforementioned earth's surface aeolian sand, rubble
Or flyash, the proportioning between cement three are 6:3:1.
Aforesaid method, it is characterised in that in Step3, uses protrusive filling retrusive
When coal column replaces asynchronous mining type, before coal column replacement exploitation, by isolated coal pillar towards border coal
Post direction, to each strip coal pillar between band mined out region filling, complete all with protrusive filling
The mined out region of band, then to the band after filling, mined out region is closed, and forms U-shaped
Fallback mode replacement exploitation strip coal pillar is used again after ventilating system.
Aforesaid method, it is characterised in that in Step3, uses protrusive filling retrusive
When coal column replaces asynchronous mining type filling, the packwall in the mined out region of band is against band coal
Post, filling width 8m, and leave operation and the vent passages of 4m.
Aforesaid method, it is characterised in that in Step3, uses retrusive filling retrusive
During coal column displacement Synchronization mining mode, first the band between the 1st strip coal pillar and border coal column is adopted
Dummy section carries out filling, and during filling, compound is against border coal column filling, and melt flow length is for cutting
Eye length, filling width takes 8m, the 8m width band between border coal column and the 1st strip coal pillar
After the filling of mined out region finishes, that opens between the 1st and the 2nd strip coal pillar is airtight, the 1st with
The mined out region of band between the 2nd strip coal pillar carries out filling, between the 1st and the 2nd strip coal pillar
After band mined out region filling finishes, carry out the replacement exploitation of the 1st strip coal pillar, the 1st band
While coal column replacement exploitation, the mined out region of band carrying out between the 2nd and the 3rd strip coal pillar is filled
Filling out, while displacement 2 strip coal pillar, between filling the 3rd and the 4th strip coal pillar, band is mined out
Region, by that analogy, until all strip coal pillars are all replaced, filling finishes.
Aforesaid method, it is characterised in that in Step3, uses retrusive filling retrusive
When coal column replaces asynchronous mining type, the first mined out region of the complete all bands of retrusive filling, then
To the band after filling, mined out region is closed, after using after forming U-shaped ventilating system again
The mode of moving back exploits strip coal pillar.
The invention have benefit that:
(1) security is good
The either asynchronous mining type of protrusive filling retrusive coal column displacement, or retrusive fills
Fill out retrusive coal column displacement synchronous/asynchronous mining type, all avoid owing to indivedual coal columns are unexpected
Destroy the possibility causing roof strata to destroy on a large scale, during substantially increasing replacement exploitation
The overall security of coal column；
(2) coal column replacement rate is high
The either asynchronous mining type of protrusive filling retrusive coal column displacement, or retrusive fills
Fill out retrusive coal column displacement synchronous/asynchronous mining type, strip coal pillar all can be replaced
Out, coal column replacement rate is high.
Brief description
Fig. 1 be adopt 12 stay 8 Striping noise after residual exploiting field schematic diagram；
Fig. 2 is the residual exploiting field schematic diagram after the mined out area end of band takes closing measure；
Fig. 3 (a) is the schematic diagram in the mined out region of band between filling the 1st and the 2nd strip coal pillar；
Fig. 3 (b) is between displacement the 1st strip coal pillar simultaneously filling the 2nd and the 3rd strip coal pillar article
Schematic diagram with mined out region；
Fig. 3 (c) is between displacement the 2nd strip coal pillar simultaneously filling the 3rd and the 4th strip coal pillar article
Schematic diagram with mined out region；
Fig. 3 (d) is that displacement strip coal pillar finishes rear goaf filling situation schematic diagram；
Fig. 4 is retrusive filling retrusive coal column displacement asynchronous exploitation schematic diagram；
Fig. 5 is protrusive filling retrusive coal column displacement asynchronous exploitation schematic diagram.
Detailed description of the invention
Make concrete introduction below in conjunction with the drawings and specific embodiments to the present invention.
As a example by Yu Shen Fu mining area medium and small colliery.
First, U-shaped ventilating system is formed
National security is supervised colliery Work Safety Supervision Bureau of country of general bureau and is carried out special return air with regard at small coal mines
Notice (safety supervision total coal row (2007) 216 of well, wall coal method and support pattern reform
Number) Article 3 regulation, small coal mines must use wall coal method, and coal-face must shape
Helping blast ventilating system, at least keeping two unimpeded extra exits, one leads to into air way
Road, another leads to return aircourse.
With reference to Fig. 1, exploiting 10 bands, the width of each band is 12m, has 10 bars
After coal column (width of each strip coal pillar is 8m), stay and set an isolated coal pillar, isolation
The width of coal column is 20m.
Before the replaced extraction of residual exploiting field strip coal pillar, distinguished and admirable holding should be made properly functioning.
When residual exploiting field strip coal pillar is replaced, use retrusive substitute mode.Distinguished and admirable short for preventing
Road, it is necessary to mined out two terminations of banded zone are closed.Should detect mined out before closing
Goaf gas is diluted by the gas density in district, CO concentration and oxygen concentration, and discharge has
Poison, pernicious gas, in order to create good environment in the operation of residual exploiting field for workman.When residual exploiting field
After the oxygen concentration in territory reaches normal value, from the beginning of isolated coal pillar, towards initial strip coal pillar
Direction, is i.e. gradually closed mined out article by the 10th row's strip coal pillar to the 1st row's strip coal pillar direction
Two, region end portion, ultimately forms a U-shaped ventilating system.
With reference to Fig. 2, fresh distinguished and admirable from haulage gate entrance, blow over replaced strip coal pillar work
After making face, dirty wind is back to the big lane of return air along air return way.
When closing residual exploiting field band mined out region Liang Ge termination, for preventing from leaking out, use brick structure
Band mined out region Liang Ge termination is closed by brattice.During displacement strip coal pillar, the 1st
After row's replaced extraction of strip coal pillar, first by between the 1st row's strip coal pillar and the 2nd row's strip coal pillar
Brick structure brattice open, then exploit the 2nd row's strip coal pillar, by that analogy, persistently formed steady
Fixed U-shaped ventilating system.
2nd, residual stope filling material is prepared
Yu Shen Fu mining area medium and small colliery is located in the edge zone of Mu us dese, and earth's surface major part is
Typical aeolian dune and dust storm beach, have abundant yellow ground resource, and aeolian sand can be adopted as residual
The main filling raw material in district.
Mu us dese aeolian sand natural dry density is at 1.53-1.64g/cm3, proportion typically exists
Between 2.63-2.67, based on particle diameter is with particulate, powder and sticky content are few, belong to fine sand level.
Based on aeolian sand material composition is with light minerals such as quartz, feldspars, heavy mineral content is few but species relatively
Many, based on hornblend, allochite and garnet.
Based on aeolian sand granulometric composition is with fine sand (0.25mm-0.1mm), very fine sand
(0.1mm-0.05mm) taking second place, medium sand (0.25mm-0.5mm) is less, is more than 0.5mm
With few less than 0.05mm person's content.The nonuniformity coefficient of aeolian sand is 1.54-3.79, curvature
Coefficient is many between 1.0-2.36, median particle diameter d50For 0.097-0.215, belong to disproportionately graded
Fine sand, belong to low compressibility soil.Aeolian sand shearing strength is relatively low, and theoretical cohesive strength is 0, deposits
Interlocking between particle and inlaying the structural capacity being formed with interlocking, but numerical value is less, test is surveyed
Obtain c value 1.05kPa-12.98kPa,It is worth 25 °-31 °.
Owing to aeolian sand particle diameter is too small, theoretical cohesive strength is 0, belongs to poor grain size distribution and inviscid,
Therefore, if without aggregates and adhesive, between particle, there is no embedded squeezing effect, aeolian accumulation
Sand will be difficult to compacting, and the aeolian accumulation abrasive band stability after the band mined out region filling of residual exploiting field may reach
Require less than intensity.
Accordingly, it is considered to add the coarse aggregate of certain proportioning and a small amount of Binder Materials in aeolian sand,
Strengthen the bulk strength of aeolian sand material.
Kong Yukun the article pointed out at the research of Eolian " cement, flyash stablize ",
Employing aeolian sand, flyash and cement admixture:
(1) proportioning aeolian sand is taken: flyash (< 0.074mm content is 79%): cement=57:
During 35:8, unconfined compressive strength is up to 3.14MPa；
(2) proportioning aeolian sand is taken: flyash (< 0.074mm content is 79%): cement=82:
During 10:8, unconfined compressive strength is 1.35MPa.
Cycle etc. " cement stabilizing aeolian sand as road surface base layer material experimental study profit
With " one the article pointed out, use aeolian sand, rubble and cement admixture, take proportioning cement: broken
Stone: during aeolian sand=12.5:30.5:66,7d unconfined compressive strength is up to 2.32MPa.
Therefore, (main mining coal seam buried depth under the conditions of Yu Shen Fu mining area Local mines in small-medium size shallow overburden
Basic within 150m), using earth's surface aeolian sand as major ingredient, using rubble or flyash as
Aggregate, using cement as adhesive, obtains compound after adding suitable quantity of water mixing, and i.e. residual exploiting field is filled
Underfill material.After testing, this compound 7d unconfined compressive strength is up to 1MPa-3MPa, base
Originally the needs of the residual exploiting field in shallow buried coal seam down-hole band mined out region filling can be met.
For the actual conditions of Yu Shen Fu mining area down-hole strip filling, as the preferred scheme of one,
Earth's surface aeolian sand, rubble or flyash, the proportioning between cement three are 6:3:1.Through inspection
Surveying, under this proportioning, unconfined compressive strength is up to 2MPa-3MPa.
Additionally, Yu Shen Fu mining area medium and small colliery earth's surface has abundant aeolian sand resource, use wind
Long-pending sand, rubble or flyash, cement, the mixed filling material (i.e. compound) of water, compare
In waste filling or paste body filling, there is obvious advantage.
3rd, the residual exploiting field of filling
Owing to aeolian sand fine content is more, during so carrying out hydraulic filling, spoil disposal difficulty can be relatively
Greatly.
Simultaneously as Yu Shen Fu mining area medium and small colliery main mining coal seam roof and floor is all containing mud stone, mud stone
Not only meet water stability to decline to a great extent, and working face draining arduous task can be caused.
Therefore, during the residual exploiting field of filling, do not use hydraulic filling mode, and employing with aeolian sand is
The compound filling method of main body.
Filling system use from move crawler type filling system, mainly by ribbon conveyer, elevating conveyor,
Automatic moving type crawler belt filling machine and ramming conveyer belt composition.Filling process be designed as earth's surface aeolian sand,
Rubble or flyash, cement, mix after adding water to adopting panel storage chamber through track or conveyer belt
Material through elevating conveyor to haulage gate (auxiliary fortune crossheading) adhesive tape, utilize automatic moving type crawler belt filling machine to
Filling machine front end ramming conveyer belt transports compound, carries out filling to the mined out region of band.
During residual stope filling, both can use protrusive filling method, it would however also be possible to employ retrusive
Filling method.
1st, retrusive filling method
When using retrusive filling, specifically also can use following two mode.
(1) retrusive filling retrusive coal column displacement Synchronization mining mode
With reference to Fig. 3 (a), first the band between the 1st strip coal pillar and border coal column is adopted during filling
Dummy section carries out filling, utilizes automatic moving type crawler belt filling machine to transport to filling machine front end ramming conveyer belt
Send compound, carry out filling to the mined out region of band.During filling, compound is against border coal column
Filling, melt flow length is for cutting a length, and filling width takes 8m, i.e. aeolian sand obturation and the
Stay 4m width as workman's operation and vent passages between 1 strip coal pillar.Border coal column and the 1st
After 8m width band mined out region filling between strip coal pillar finishes, open the 1st and the 2nd band
Airtight between coal column, the mined out region of band between the 1st and the 2nd strip coal pillar carries out filling.
After band mined out region filling between the 1st and the 2nd strip coal pillar finishes, the 1st article can be carried out
Replacement exploitation with coal column.
With reference to Fig. 3 (b), while the 1st strip coal pillar replacement exploitation, carry out the 2nd and the 3rd
Band mined out region filling between strip coal pillar.When replacing the 2nd strip coal pillar, should be by the
Filling band between the 1 and the 2nd strip coal pillar is closed with goaf, with Anti-air-leakage.
With reference to Fig. 3 (c), while displacement 2 strip coal pillar, filling the 3rd and the 4th band
The mined out region of band between coal column.
By that analogy, until all strip coal pillars are all replaced, filling finishes.
With reference to Fig. 3 (d), after strip coal pillar displacement finishes with filling, form 11 aeolian sands altogether
Filling band.
This filling method preferably achieves filling of the displacement of strip coal pillar mined out region with band
Filling out and carrying out simultaneously, operating efficiency is higher.
(2) the asynchronous mining type of retrusive filling retrusive coal column displacement
The process of this kind of mining type is: the first mined out region of the complete all bands of retrusive filling, so
To the band after filling, mined out region is closed afterwards, uses after forming U-shaped ventilating system again
Fallback mode exploits strip coal pillar.
With reference to Fig. 4, by border coal column towards isolated coal pillar direction, first to each strip coal pillar between bar
Carry the filling of mined out region.During filling, the packwall in the mined out region of band is against strip coal pillar, filling
Width 8m, and leave operation and the vent passages of 4m.Filling the 1st and the 2nd strip coal pillar
Between band mined out region when, packwall against the 1st strip coal pillar, filling width 8m, with
Staying operation and the vent passages of 4m between isolated coal pillar, filling closes filling the 1st after finishing in time
With two terminations of the 2nd strip coal pillar, then carry out band between the 2nd and the 3rd strip coal pillar mined out
The filling in region, by that analogy, until filling the complete the band goaf between 10 and isolated coal pillar
Territory rear enclosed, forms regular U-shaped ventilating system, can set about carrying out the 1st strip coal pillar
Replacement exploitation.
In retrusive filling, asynchronous mining type is compared to Synchronization mining mode, at band coal
The stability of post, prevention top board are caving on a large scale, prevent the aspects such as ventilating system Air escape branch all
Relatively have superiority, be more beneficial for ensureing production zone country rock general safety, therefore use retrusive
It during filling, is preferred with asynchronous mining type.
2nd, protrusive filling method
Consider to avoid in retrusive stowing operation, owing to indivedual coal column accidental destruction cause top board rock
The possibility that layer destroys on a large scale, we can use the displacement of protrusive filling retrusive coal column different
Step mining type.
The asynchronous mining type of protrusive filling retrusive coal column displacement, i.e. before coal column replacement exploitation,
By isolated coal pillar towards border coal column direction, first to each strip coal pillar between the mined out region of band fill
Fill out, with the mined out region of the complete all bands of protrusive filling, the filling in band mined out region during filling
Band is against strip coal pillar, filling width 8m, and leaves operation and the vent passages of 4m；Fill
After filling out end, to the band after filling, mined out region is closed, and forms U-shaped ventilating system
After use fallback mode replacement exploitation strip coal pillar again.
With reference to Fig. 5, during the mined out region of band between filling isolated coal pillar and the 10th strip coal pillar,
Packwall is against the 10th strip coal pillar, filling width 8m, and stays the work of 4m between isolated coal pillar
Industry and vent passages, filling closes filling isolated coal pillar and the 10th strip coal pillar after finishing in time
Two terminations, then carry out the filling in the mined out region of band between the 10th and the 9th strip coal pillar,
By that analogy, until the mined out region of band between complete 1st strip coal pillar of filling and border coal column, with
When form regular U-shaped ventilating system, the displacement that can set about carrying out the 1st strip coal pillar is opened
Adopt.
The asynchronous mining type of protrusive filling retrusive coal column displacement avoids due to indivedual coal columns meaning
Outer destruction causes the possibility that roof strata destroys on a large scale, substantially increases replacement exploitation process
The overall security of middle coal column.
It should be noted that above-described embodiment does not limit the present invention, all employings etc. in any form
The technical scheme being obtained with the mode of replacement or equivalent transformation, all falls within the protection model of the present invention
In enclosing.
Claims (9)
1. in, small mine narrow strips exploits a residual exploiting field partial stowage coal column method of replacing, and it is special
Levy and be, comprise the following steps:
Step1, formation U-shaped ventilating system:
Exploit 10 bands, after having 10 strip coal pillars, stay and set an isolated coal pillar, use
Retrusive substitute mode replaces strip coal pillar, after the oxygen concentration in residual exploiting field territory reaches normal value,
From the beginning of isolated coal pillar, towards initial strip coal pillar direction, gradually close mined out banded zone
Two end portions, ultimately form a U-shaped ventilating system, fresh distinguished and admirable from haulage gate
Entering, after blowing over replaced strip coal pillar working face, dirty wind is back to return air along air return way
Big lane；
Step2, prepare residual stope filling material:
Using earth's surface aeolian sand as major ingredient, rubble or flyash as aggregate, cement as gluing
Agent, obtains compound, i.e. residual stope filling material after adding suitable quantity of water mixing；
Step3, the residual exploiting field of filling:
Use from moving crawler type filling system, with protrusive filling method or retrusive filling method,
Carry out filling to the mined out region of band, wherein, described protrusive filling method includes: protrusive
The asynchronous mining type of filling retrusive coal column displacement, described retrusive filling method includes: retreat
Formula filling retrusive coal column displacement Synchronization mining mode, the displacement of retrusive filling retrusive coal column are different
Step mining type.
2. method according to claim 1, it is characterised in that in Step1, described
The width of band is 12m, and the width of strip coal pillar is 8m, and the width of isolated coal pillar is 20m.
3. method according to claim 2, it is characterised in that in Step1, closes
During mined out two terminations of banded zone, brick structure brattice is used to close.
4. method according to claim 3, it is characterised in that in Step1, displacement
During strip coal pillar, after the 1st replaced extraction of row's strip coal pillar, by the 1st row's strip coal pillar
And the 2nd the brick structure brattice between row's strip coal pillar open, then exploit the 2nd row's strip coal pillar, with
This analogizes, and persistently forms stable U-shaped ventilating system.
5. method according to claim 1, it is characterised in that in Step2, described
Earth's surface aeolian sand, rubble or flyash, the proportioning between cement three are 6:3:1.
6. method according to claim 1, it is characterised in that in Step3, uses
When protrusive filling retrusive coal column replaces asynchronous mining type, before coal column replacement exploitation, by
Isolated coal pillar towards border coal column direction, to each strip coal pillar between band mined out region filling, with
The mined out region of the complete all bands of protrusive filling, then to the band after filling, mined out region is carried out
Close, after forming U-shaped ventilating system, use fallback mode replacement exploitation strip coal pillar again.
7. method according to claim 6, it is characterised in that in Step3, uses
When protrusive filling retrusive coal column replaces asynchronous mining type filling, filling of the mined out region of band
Fill out band against strip coal pillar, filling width 8m, and leave operation and the vent passages of 4m.
8. method according to claim 1, it is characterised in that in Step3, uses
During retrusive filling retrusive coal column displacement Synchronization mining mode, first to the 1st strip coal pillar and limit
The mined out region of band between boundary's coal column carries out filling, and during filling, compound fills against border coal column
Filling out, melt flow length is for cutting a length, and filling width takes 8m, border coal column and the 1st band coal
After the 8m width band mined out region filling of intercolumniation finishes, open between the 1st and the 2nd strip coal pillar
Airtight, the mined out region of band between the 1st and the 2nd strip coal pillar carries out filling, the 1st with
After band mined out region filling between the 2nd strip coal pillar finishes, carry out putting of the 1st strip coal pillar
Change exploitation, while the 1st strip coal pillar replacement exploitation, carry out between the 2nd and the 3rd strip coal pillar
Band mined out region filling, displacement 2 strip coal pillar while, filling the 3rd and the 4th article
The mined out region of band between band coal column, by that analogy, until all strip coal pillars are all replaced,
Filling finishes.
9. method according to claim 1, it is characterised in that in Step3, uses
When retrusive filling retrusive coal column replaces asynchronous mining type, the first complete all bars of retrusive filling
Carrying mined out region, then to the band after filling, mined out region is closed, and forms U-shaped and leads to
Fallback mode exploitation strip coal pillar is used again after wind system.
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Cited By (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN107091112A (en) * | 2017-06-30 | 2017-08-25 | 山东科技大学 | A kind of Fast Filling method suitable for lossless mining |
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Cited By (10)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN107091112A (en) * | 2017-06-30 | 2017-08-25 | 山东科技大学 | A kind of Fast Filling method suitable for lossless mining |
| CN110671146A (en) * | 2019-10-25 | 2020-01-10 | 中冶长天国际工程有限责任公司 | Method for determining width of cemented filling body |
| CN110671146B (en) * | 2019-10-25 | 2020-12-04 | 中冶长天国际工程有限责任公司 | Method for determining width of cemented filling body |
| CN111156000A (en) * | 2020-04-07 | 2020-05-15 | 北京中矿创新联盟能源环境科学研究院 | Low seam coal-pillar-free retreating type coal mining method |
| CN112412459A (en) * | 2020-12-17 | 2021-02-26 | 贵州大学 | Special strip type filling mining method |
| CN112412459B (en) * | 2020-12-17 | 2022-07-12 | 贵州大学 | Special strip type filling mining method |
| CN113482711A (en) * | 2021-08-16 | 2021-10-08 | 中国矿业大学(北京) | Pre-filling method for reducing end mining coal pillar |
| CN113513345A (en) * | 2021-08-16 | 2021-10-19 | 中国矿业大学(北京) | Method for reducing protective coal pillar by filling and reinforcing along with withdrawing of support |
| CN113513345B (en) * | 2021-08-16 | 2022-04-12 | 中国矿业大学(北京) | Method for reducing protective coal pillar by filling and reinforcing along with withdrawing of support |
| CN113482711B (en) * | 2021-08-16 | 2022-04-12 | 中国矿业大学(北京) | Pre-filling method for reducing end mining coal pillar |
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