CN104832175B - The method that a kind of other up second mining of bilateral part filling of post pedals sky coal seam - Google Patents
The method that a kind of other up second mining of bilateral part filling of post pedals sky coal seam Download PDFInfo
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- 239000003245 coal Substances 0.000 title claims abstract description 151
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- 238000009826 distribution Methods 0.000 claims abstract description 12
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- 239000011229 interlayer Substances 0.000 claims description 7
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 claims description 6
- 238000010276 construction Methods 0.000 claims description 5
- 238000004519 manufacturing process Methods 0.000 claims description 4
- 238000002360 preparation method Methods 0.000 claims description 4
- 230000003245 working effect Effects 0.000 claims description 4
- 239000004568 cement Substances 0.000 claims description 3
- 239000010881 fly ash Substances 0.000 claims description 3
- 239000013521 mastic Substances 0.000 claims description 3
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- 235000019738 Limestone Nutrition 0.000 description 1
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- E—FIXED CONSTRUCTIONS
- E21—EARTH OR ROCK DRILLING; MINING
- E21C—MINING OR QUARRYING
- E21C41/00—Methods of underground or surface mining; Layouts therefor
- E21C41/16—Methods of underground mining; Layouts therefor
- E21C41/18—Methods of underground mining; Layouts therefor for brown or hard coal
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- E—FIXED CONSTRUCTIONS
- E21—EARTH OR ROCK DRILLING; MINING
- E21F—SAFETY DEVICES, TRANSPORT, FILLING-UP, RESCUE, VENTILATION, OR DRAINING IN OR OF MINES OR TUNNELS
- E21F15/00—Methods or devices for placing filling-up materials in underground workings
- E21F15/005—Methods or devices for placing filling-up materials in underground workings characterised by the kind or composition of the backfilling material
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- E—FIXED CONSTRUCTIONS
- E21—EARTH OR ROCK DRILLING; MINING
- E21F—SAFETY DEVICES, TRANSPORT, FILLING-UP, RESCUE, VENTILATION, OR DRAINING IN OR OF MINES OR TUNNELS
- E21F15/00—Methods or devices for placing filling-up materials in underground workings
- E21F15/08—Filling-up hydraulically or pneumatically
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Abstract
The invention discloses the method that a kind of other up second mining of bilateral part filling of post pedals sky coal seam.This invention is on the basis of differentiation is pedaled sky coal seam Upward mining feasibility, verified tool post formula residual exploiting field coal column group and dead zone group's distribution situation, using the method for the other bilateral part filling of post, side has been protected and is pedaled sky coal seam and underlie tool post formula residual exploiting field coal column group successively, and gradually sky coal resources are pedaled in extraction.The other bilateral obturator of post that this invention is formed in the group of dead zone can not only be all risen to side to tool post formula coal column and be protected effect, and common supporting body can be formed therewith, and then reduce stress concentration degree and the deformation of creep of coal column group, strengthen long-time stability, avoid the unstable failure of Local Instantaneous unstability or " dominoes " formula, and ultimate guarantee tool post formula residual exploiting field overlying pedals the safe working in sky coal seam.
Description
Technical field
The present invention relates to technical field of coal exploitation, especially relate to a kind of other up second mining of bilateral part filling of post and pedal sky
The method in coal seam, is primarily adapted for use in the safe working that tool post formula residual exploiting field overlying pedals sky coal seam.
Background technology
Currently, the contradiction of coal resources finiteness and its consumption demand unlimitedness.Residual coal second mining is to slow down
The Important Action of above-mentioned contradiction.Residual coal second mining not only can improve the recovery ratio of coal resources, enterprise economic benefit, and
Mine service-life can be extended, promote sustainable development.
In recent years, the residual exploiting field in colliery Upward mining increasingly becomes focus of concern.By mining influence in advance, residual adopt
The integrity of area Deng Kong coal seam and its floor strata and stability all suffer from different degrees of damage, and then may cause ore deposit
Well disaster, impact safety in production.Therefore, residual exploiting field overlying is pedaled sky safely mining of coalbed feasibility assessment and is determined to be up opening
The top priority adopted.Traditionally, the method for discrimination of residual exploiting field Upward mining feasibility mainly includes：" three bands " diagnostic method, country rock
Counterbalanced procedure, ratio discriminatory method and mathematics analytic process etc..CN101109283B is from the angle quantitative identification of interlayer strata structure
Pedal the feasibility of sky coal seam Upward mining；CN104239697A is first modeled to Upward mining influence factor using PCA, then
Weight calculation is carried out using variance contribution ratio to institute's established model, and then have rated the feasibility of Upward mining；
CN103147737A provides a kind of detection method of Upward mining Overburden Failure Law, discloses overlying strata during Upward mining
The temporal and spatial evolution destroyed, solves the problems, such as that Upward mining work surface and roadway layout rationally determine it is ensured that up open
The safety adopted.The aforementioned method of discrimination pedaling sky coal seam Upward mining feasibility is mainly from interlayer depth of stratum and its stability
Angularly start with research, it can be realized the differentiation in advance and evaluation to residual exploiting field Deng Kong coal seam Upward mining feasibility, enter
And instruct engineering practice.
However, the theoretical research of existing Upward mining and engineering practice rarely have stablizing of concern tool post formula residual exploiting field coal column group
Property is to the impact pedaling sky safely mining of coalbed.The stability of tool post formula residual exploiting field coal column group governs pedals sky coal seam Upward mining
Safety is carried out, and it pedals sky coal seam with overlying and its floor strata forms a cogeneration system.With the residual exploiting field of tool post formula gradually
Formed, stope stress redistributes because of the releasing of coal column lateral stress.The stress of so tool post formula Remnant mining coal column will
It is changed into the load of Relatively centralized distribution from equally distributed load originally, and gradually pedal diffusion in sky seat earth rock stratum to overlying
With transmission.In the process, tool post formula residual exploiting field coal column from outward appearance to inner essence can occur creep rupture, its effective bearing area also by
Decrescence little, the distribution again of concentrated stress thus can be caused to expand the surrender width of coal column further, reduce its elastic kernel
The width in area.When the effective bearing area of tool post formula residual exploiting field coal column continues to be reduced to its ultimate bearing area, will occur
Instantaneous unstable failure.Now, the destruction ripple that the instantaneous unstability of above-mentioned coal column produces may shift and be diffused into adjacent coal column,
Cause the unstable failure of tool post formula residual exploiting field coal column group " dominoes " formula, and then affect overlying and pedal sky coal seam and its base plate rock
The globality of layer and stability, or even produce the disasters such as bump, threaten safe and efficient production.
To sum up, need badly to find a kind of reinforcement and pedal sky coal seam and underlie the method for tool post coal column group's stability, and then effectively solving
There is the unstability of Local Instantaneous unstability or " dominoes " formula in tool post formula residual exploiting field coal column group during pedaling sky seam mining
Destroy, and ultimate guarantee is pedaled the safety of sky coal seam Upward mining and carried out.
Content of the invention
The technical problem to be solved is：Provide a kind of other up second mining of bilateral part filling of post and pedal sky coal seam
Method, efficiently solve tool post formula residual exploiting field coal column group pedal sky coal seam Upward mining process occur Local Instantaneous unstability or
The unstable failure of " dominoes " formula, has ensured the safety pedaling sky coal seam Upward mining.
For solving above-mentioned technical problem, the technical scheme is that：A kind of other up second mining of bilateral part filling of post is pedaled
The method in empty coal seam is pedaled sky coal seam Upward mining feasibility, is verified tool post formula residual exploiting field coal column group and dead zone group distribution shape in differentiation
On the basis of condition, using the method for the other bilateral part filling of post, side has been protected and is pedaled sky coal seam and underlie tool post formula residual exploiting field coal column successively
Group, and gradually sky coal resources are pedaled in extraction.Described technical scheme specifically follows the steps below：
(1) differentiate that tool post formula residual exploiting field overlying pedals the feasibility of sky coal seam Upward mining；
(2) combine the original geology of mine, technical data, exploration find out pedal sky coal seam underlie tool post formula residual exploiting field coal column group and
The distribution situation of dead zone group, the distributional pattern figure drawing tool post formula residual exploiting field coal column group with dead zone group is to instruct safety life to adopt；
(3) driving pedals the stope drift active workings in sky coal seam, and arrangement pedals sky working face of coal seam；
(4) from top to bottom hole pedaling sky working face of coal seam base plate, arrangement tool post formula residual exploiting field dead zone group's paste body filling
Transfer pipeline；
(5) prepare fill paste, the transfer pipeline along step (4) will be uniform for the mastic preparing in the presence of filling pump
So as to setting and hardening produces side shield effect to tool post formula residual exploiting field end coal column in injection tool post formula residual exploiting field end dead zone；
(6) sky working face of coal seam is pedaled in propulsion, when exploiting 3-8m before line is advanced into next tool post dead zone boundary line, stops
Propulsioning face；
(7) with the gradually propulsion pedaling sky coal seam, the construction technology of repeat step (4), (5) and (6), using the other bilateral of post
The mode of part filling side shield tool post formula residual exploiting field coal column group successively, and gradually sky coal resources are pedaled in extraction.
Preferably, described step (1) is using " three bands " diagnostic method, country rock counterbalanced procedure, ratio discriminatory method, mathematical analysis method
Carry out comprehensive distinguishing tool post formula residual exploiting field overlying with quantitative identification method described in CN101109283B for the Authorization Notice No. and pedal sky coal seam
The feasibility of Upward mining.
Preferably, by investigating the original geology of mine, technical data, described step (2) investigates thoroughly that pedaling sky coal seam underlies tool post
The width of formula residual exploiting field dead zone group and coal column group, highly, precisely detects tool post formula residual exploiting field dead zone using three-dimensional laser scanner
The distribution orientation of group, size and volume.
Preferably, the top arrangement of the tool post formula residual exploiting field end coal column that described step (3) is verified in step (2) pedals sky
The stope drift active workings in coal seam and work surface.
Preferably, in described step (4), drilling construction is carried out using casing drilling technology, bore dia be 60 120mm,
Pitch of holes is 5 20m, hole inclination angle is 10 ° 60 °, drilling depth h is determined by interlayer depth of stratum and bore inclining angle.
Preferably, described step (5) is gangue/discarded concrete according to mass percent：Flyash：Cement：Subtract
Water preparation：Water=45% 55%：15% 20%：10% 15%：3% 5%：15% 25% ratio, compound concentration
Fill paste for 75% 85%, the distributed dimension of each dead zone in the residual exploiting field of tool post formula that amount of preparation is found out by step (2) exploration
To determine with volume of distribution.
Preferably, in described step (5) Stress control of filling pump in 2 6MPa.
Preferably, the advance distance pedaling sky working face of coal seam in described step (6) is [(a+b) ± 5] m；Wherein, a is
Tool post formula residual exploiting field depletion region width, b is tool post formula residual exploiting field coal pillar width.
Preferably, width sum c of the other bilateral obturator of described step (7) center pillar1+c2Empty less than the residual exploiting field of tool post formula
The width a in area.
Using technique scheme, the invention has effective effect that：
This invention is pedaled sky coal seam Upward mining feasibility, is verified tool post formula residual exploiting field coal column group and dead zone group distribution in differentiation
On the basis of situation, using the method for the other bilateral part filling of post, side has been protected and is pedaled sky coal seam and underlie tool post formula residual exploiting field coal column successively
Group, and gradually sky coal resources are pedaled in extraction.The other bilateral obturator of post that this invention is formed in the group of dead zone can not only be to tool post formula
Coal column is all risen and is protected effect to side, and can form common supporting body therewith, and then reduces the stress concentration degree of coal column group and compacted
Deformation, strengthens long-time stability, it is to avoid the unstable failure of Local Instantaneous unstability or " dominoes " formula occurs, and finally protects
Barrier tool post formula residual exploiting field overlying pedals the safe working in sky coal seam.
Brief description
Fig. 1 pedals sky working face of coal seam arrangement schematic diagram for tool post formula residual exploiting field overlying；
Fig. 2 is the other filling schematic diagram of tool post formula residual exploiting field end coal column post；
Fig. 3 pedals sky working face of coal seam propulsion schematic diagram for tool post formula residual exploiting field overlying；
Fig. 4 is the other bilateral part filling three-dimensional effect diagram of tool post formula residual exploiting field dead zone bundle pillar；
Fig. 5 is the other bilateral part filling planar effect picture of tool post formula residual exploiting field dead zone bundle pillar.
In figure：1 pedals sky coal seam；2 interlayer rock stratum；3 tool post formula residual exploiting field coal columns；4 tool post formula residual exploiting fields dead zone；
5 pedal sky working face of coal seam；The other bilateral part fill line road of 6 posts；7 tool post formulas residual exploiting field Filling mine-out area body；A knife
Pillar residual exploiting field depletion region width；B tool post formula residual exploiting field coal pillar width；c1Obturator width on the left of the dead zone of tool post formula residual exploiting field
Degree；c2Obturator width on the right side of the dead zone of tool post formula residual exploiting field.
Specific embodiment
Following examples are intended to make schematic illustration and explanation to the present invention, not delimit the scope of the invention.
In order to have clearer understanding to the technical goal of the present invention, feature and effect, in conjunction with accompanying drawing to post side bilateral
The method that the up second mining of part filling pedals sky coal seam is described in further detail.
The nineties in 20th century, Xishan coal electricity group Bai Jiazhuan colliery surmounts No. 6 coal seams and has preferentially exploited bottom 8 coal
Layer.At present, Bai Jiazhuan colliery 6 coal seam 36703 work surface ground location is located at smelting valley ventilating shaft west and south mountain area, and down-hole is located at south
Cheat 1001 horizontal seven panel right flanks, left front portion is 36502 work face goafs, and left back portion is unworked country, and right part is 36701 work
Face unworked country, bottom is 38502 tool post formula goafs, belongs to typical tool post formula residual exploiting field overlying and pedals sky coal seam.No. 8 coal seams
The stability of 36502 tool post formulas residual exploiting field coal column group seriously governs No. 6 coal seam 36703 work surfaces and pedals null resource Upward mining
Safety carry out.For above-mentioned situation, below in conjunction with the accompanying drawings the implementation process of the present invention is described in further detail.
Step one, using " three bands " diagnostic method, country rock counterbalanced procedure, ratio discriminatory method, mathematical analysis method and Authorization Notice No.
Quantitative identification method described in CN101109283B, the feasibility of No. 6 Deng Kong coal seam 1 Upward mining in dialogue man village colliery is made comprehensively
Differentiate：Pedal in the warp damage that sky coal seam 1 is located at interlayer rock stratum 2, structural deterioration degree is less, only there occurs and moves integrally；8
Above number residual exploiting field of coal seam tool post formula, there is the thick hard limestone that can play balanced action, it can ensure that pedaling sky coal seam 1 does not occur
The step changing of the relative positions；Pedaling sky coal seam 1 and the mining influence multiple in No. 8 coal seams is 6.8；The necessary interlamellar spacing of Upward mining is 10.4m, bright
Aobvious being less than pedals sky coal seam 1 and the thickness 27.9m of No. 8 coal seams interlayer rock stratum 2；Pedal sky coal seam 1 Upward mining and meet quantitative identification method
Described adopted situation.To sum up, Bai Jiazhuan colliery 8 coal seam 36502 tool post formula residual exploiting field overlying pedals sky coal seam 1 Upward mining is
Feasible.
Step 2, knows according to original geology, technical data, Bai Jiazhuan colliery 8 coal seam 36502 tool post formula residual exploiting field coal column
3 groups and the width respectively 5m 15m and 15 40m of tool post formula residual exploiting field dead zone 4 groups, highly it is 3.8m；Swashed using three-dimensional
Photoscanner precisely reconnoitres the distribution orientation of 36502 tool post formula residual exploiting field coal column 3 groups and tool post formula residual exploiting field dead zone 4 groups, size
And volume, draw the distributional pattern figure of No. 8 coal seam 36502 tool post formula residual exploiting field coal columns 3 groups and tool post formula residual exploiting field dead zone 4 groups with
Instruct the safe second mining pedaling sky coal seam 1 coal resources.
Step 3, starts to tunnel the back production pedaling sky coal seam 1 above the tool post formula residual exploiting field end coal column that step 2 is detected
Tunnel, arrangement pedals the work surface 5 in sky coal seam.
Step 4, is pedaling sky working face of coal seam 5 base plate from top to bottom using casing drilling technology (setting of casing in drilling)
Boring, bore dia is 80mm, pitch of holes L is 12m, hole inclination angle is 30 °, drilling depth h is 30 36m, the other bilateral of arrangement post
Part fill line road 6.
Step 5, is gangue/discarded concrete according to mass percent：Flyash：Cement：Water reducer：Water=50%：
15%：15%：5%：15% ratio, compound concentration is 80% fill paste, and its amount of preparation explores, by step 2,8 finding out
The distributed dimension of number each dead zone in the residual exploiting field of coal seam 36502 tool post formula and volume determine.
Step 6, in the presence of filling pump, along step 4 arrangement the other bilateral part fill line road 6 of post by step
The mastic preparing in five is uniformly injected into be pedaled sky coal seam 1 and underlies in dead zone so as to diffusion is enriched, to No. 8 coal seams 36502 tool post formula
Residual exploiting field end coal column produces side shield effect.
Step 7, sky working face of coal seam 5 (advance distance is 20 25m) is pedaled in propulsion, and line to be exploited is advanced into next knife
Before the boundary line of pillar residual exploiting field dead zone 4 during 5m, stop propulsion and pedal sky working face of coal seam 5.
Step 8, the construction technology of repeat step four, five, six and seven, by the way of the other bilateral part filling of post successively
No. 8 coal seam 36502 tool post formula residual exploiting field coal columns 3 groups are protected in side, and gradually sky coal seam 1 coal resources are pedaled in extraction.
The above be the preferred embodiment of the present invention it is noted that without departing from technical spirit of the present invention with
Any improvement on the premise of principle, above-mentioned implementation made with polish, belong to the protection model of technical solution of the present invention
Enclose.
Claims (9)
1. a kind of other up second mining of bilateral part filling of post pedals the method in sky coal seam it is characterised in that comprising the following steps：
(1) differentiate that tool post formula residual exploiting field overlying pedals the feasibility of sky coal seam Upward mining；
(2) the original geology of mine, technical data are combined, exploration finds out that pedaling sky coal seam underlies tool post formula residual exploiting field coal column group and dead zone
The distribution situation of group, the distributional pattern figure drawing tool post formula residual exploiting field coal column group with dead zone group is to instruct safety in production；
(3) driving pedals the stope drift active workings in sky coal seam, and arrangement pedals sky working face of coal seam；
(4) from top to bottom hole pedaling sky working face of coal seam base plate, the conveying of arrangement tool post formula residual exploiting field dead zone group's paste body filling
Pipeline；
(5) prepare fill paste, along the transfer pipeline of step (4), the mastic preparing is uniformly injected in the presence of filling pump
So as to setting and hardening produces side shield effect to tool post formula residual exploiting field end coal column in the end dead zone of tool post formula residual exploiting field；
(6) sky working face of coal seam is pedaled in propulsion, when exploiting 3-8m before line is advanced into next tool post dead zone boundary line, stops propulsion
Work surface；
(7) with the gradually propulsion pedaling sky coal seam, the construction technology of repeat step (4), (5) and (6), using the other bilateral part of post
The mode of filling side shield tool post formula residual exploiting field coal column group successively, and gradually sky coal resources are pedaled in extraction.
2. the other up second mining of bilateral part filling of post according to claim 1 pedals the method in sky coal seam it is characterised in that institute
The step (2) stated by investigate the original geology of mine, technical data investigate thoroughly pedal sky coal seam underlie tool post formula residual exploiting field dead zone group and
The width of coal column group, highly, precisely detect distribution orientation, the size of tool post formula residual exploiting field dead zone group using three-dimensional laser scanner
And volume.
3. the other up second mining of bilateral part filling of post according to claim 1 pedals the method in sky coal seam it is characterised in that institute
The top arrangement of the tool post formula residual exploiting field end coal column that the step (3) stated is detected in step (2) pedal the stope drift active workings in sky coal seam with
Work surface.
4. the other up second mining of bilateral part filling of post according to claim 1 pedals the method in sky coal seam it is characterised in that institute
The step (4) stated carries out drilling construction using casing drilling technology, and bore dia is 60 120mm, pitch of holes L is 5 20m, brill
Hole inclination angle is 10 ° 60 °, drilling depth h is determined by interlayer depth of stratum and bore inclining angle.
5. the other up second mining of bilateral part filling of post according to claim 1 pedals the method in sky coal seam it is characterised in that institute
In the step (5) stated, fill paste is gangue/discarded concrete according to mass percent：Flyash：Cement：Water reducer：Water
=45% 55%：15% 20%：10% 15%：3% 5%：15% 25% proportions form, and its concentration is
For 75% 85%.
6. the other up second mining of bilateral part filling of post according to claim 1 pedals the method in sky coal seam it is characterised in that institute
In the step (5) stated, the amount of preparation of fill paste explores dividing of each dead zone in the residual exploiting field of tool post formula found out according to described step (2)
Cloth size and volume of distribution are determining.
7. the other up second mining of bilateral part filling of post according to claim 1 pedals the method in sky coal seam it is characterised in that institute
In the step (5) stated, the Stress control of filling pump is in 2 6MPa.
8. the other up second mining of bilateral part filling of post according to claim 1 pedals the method in sky coal seam it is characterised in that institute
The advance distance pedaling sky working face of coal seam in the step (6) stated is [(a+b) ± 5] m；Wherein, a is tool post formula residual exploiting field dead zone
Width, b is the width of tool post formula residual exploiting field coal column.
9. the other up second mining of bilateral part filling of post according to claim 1 pedals the method in sky coal seam it is characterised in that institute
The width sum of the other bilateral obturator of step (7) center pillar stated should be less than the width of tool post formula residual exploiting field dead zone.
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| CN105545309B (en) * | 2015-12-11 | 2018-05-04 | 太原理工大学 | A kind of method that coal column is left in filling second mining residual exploiting field in bilateral part by column |
| CN106121645B (en) * | 2016-06-24 | 2018-05-04 | 太原理工大学 | The method that coal column group is left in a kind of residual exploiting field of step construction filling second mining |
| CN109236297B (en) * | 2018-09-14 | 2020-07-14 | 太原理工大学 | Coal mining method for remaining coal seam in residual mining area of cracking and filling combined ascending re-mining cutter column |
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| CN104832175A (en) | 2015-08-12 |
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