CN108060921A - The high seam gob side entry ground coal recovery method of distension effect is caused based on thin coal pillar - Google Patents
The high seam gob side entry ground coal recovery method of distension effect is caused based on thin coal pillar Download PDFInfo
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- 239000003245 coal Substances 0.000 title claims abstract description 173
- 238000000034 method Methods 0.000 title claims abstract description 36
- 238000011084 recovery Methods 0.000 title claims abstract description 23
- 230000000694 effects Effects 0.000 title claims abstract description 19
- 238000005065 mining Methods 0.000 claims abstract description 24
- 238000002474 experimental method Methods 0.000 claims description 4
- 230000013011 mating Effects 0.000 claims description 4
- 238000005259 measurement Methods 0.000 claims description 4
- 238000007747 plating Methods 0.000 claims description 4
- 238000005070 sampling Methods 0.000 claims description 4
- 238000010008 shearing Methods 0.000 claims description 4
- 238000009434 installation Methods 0.000 claims description 2
- 238000004064 recycling Methods 0.000 abstract description 9
- 206010016766 flatulence Diseases 0.000 abstract description 3
- 238000004364 calculation method Methods 0.000 abstract description 2
- 230000032258 transport Effects 0.000 abstract 1
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- 239000003610 charcoal Substances 0.000 description 1
- 238000007796 conventional method Methods 0.000 description 1
- 238000000605 extraction Methods 0.000 description 1
- 238000004519 manufacturing process Methods 0.000 description 1
- 239000000463 material Substances 0.000 description 1
- 239000011435 rock Substances 0.000 description 1
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- E—FIXED CONSTRUCTIONS
- E21—EARTH OR ROCK DRILLING; MINING
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- E21B49/00—Testing the nature of borehole walls; Formation testing; Methods or apparatus for obtaining samples of soil or well fluids, specially adapted to earth drilling or wells
- E21B49/02—Testing the nature of borehole walls; Formation testing; Methods or apparatus for obtaining samples of soil or well fluids, specially adapted to earth drilling or wells by mechanically taking samples of the soil
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- E—FIXED CONSTRUCTIONS
- E21—EARTH OR ROCK DRILLING; MINING
- E21C—MINING OR QUARRYING
- E21C37/00—Other methods or devices for dislodging with or without loading
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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
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Abstract
A kind of high seam gob side entry ground coal recovery method that distension effect is caused based on thin coal pillar, the method is to determine to make overall plans with ground coal recycling by high seam gob side entry thin coal pillar rational width, comprehensive design, actively apply plan, make full use of thin coal pillar that there is the effect of roadway floor is made to generate serious bottom distension, it determines to stay by theoretical calculation and sets rational width thin coal pillar, tunnel ground coal is made to crush tympanites, itself drag conveyor will be filled in the digging of loose condition (of surface) ground coal by choosing mining loader for mine, and going to ribbon conveyer through reprinting formula conveyer transports.One aspect of the present invention overcomes keeps on file to be forced manually to play the drawbacks such as bottom Mechanization Level is low, labor strength is big when coal gob side entry generates serious bottom distension in the past, changes from passive to active, ground coal recycling each process fully achieves mechanization, and work efficiency is greatly improved；On the other hand take thin coal pillar stay set with ground coal recycling it is double arrange to develop simultaneously then reach the purpose for improving coal recovery rate.
Description
Technical field
It is especially a kind of to be caused based on thin coal pillar the present invention relates to a kind of high seam thin coal pillar gob side entry driving ground coal recovery method
The high seam gob side entry ground coal efficient recycling method of distension effect.
Background technology
In thick coal-layer mining, since working face extraction head-room is less than coal seam thickness, wherein driving along next gob tunnel is to keep away
Exempt from that roof fall accident occurs when staying top coal, therefore keep on file Mei Jue lanes using along top.This kind of tunnel is relatively low for intensity because of its bottom plate
Coal body, and in open non-support state, overlapped in adjacent goaf side branch bearing capacity and this ahead work face branch bearing capacity
Under effect, serious bottom distension can be generated.To prevent this kind of tunnel from serious bottom distension occurring during use at it, conventional method is to stay to set
20m-30m wide coal columns protect lane, side supporting pressure peak are made to be in beyond tunnel, but the direct result of this method is to reduce coal
Charcoal resource recovery and the shortening exploiting field length of service.In addition, stay the wide coal column set that roof pressure is transferred directly to bottom plate, to it
Tunnel is enclosed when underlying seam is exploited and face surrounding rock stability contorting impacts, and impulsion pressure can be caused when serious.High seam edge
When serious bottom distension occurs for empty tunnel, safe life could be met by being forced to take manually to play bottom measure trimming tunnel or even repeatedly play bottom
Production needs.It manually plays a basic skill or training and makees that Mechanization Level is low, and it is extremely difficult to dig the ground coal outward transport adopted, and expends substantial amounts of human and material resources
And financial resources.
There is document disclosed in recycling ground coal method, in October, 2010 in high seam gob side entry《Coal journal》Volume 35
" becoming hill start bottom recovery technology in the floor roadway of high-seam working face end " paper that 10 periodicals go out, lane Nei Bian slopes are proposed in literary
The method for playing bottom recycling end ground coal, is recycled to improve recovery ratio using coalcutter and manually to ground coal.But this method is still
The operating type for manually playing bottom is not completely free of, and is only applicable to the tunnel recycling ground coal that serious bottom distension does not occur for advanced section.
The coal column of previous high seam gob side entry, which stays, to be set and is forced tunnel and play bottom both independently to carry out, and does not build it
Vertical contact, makes overall plans, disposes in advance, actively apply plan.Simultaneously as it just carries out manually playing bottom, mechanization water when bottom distension is serious
Flat low, labor strength is big, it is low to play bottom efficiency, seriously restricts the fltting speed of stope.
The content of the invention
The object of the present invention is to provide it is a kind of based on thin coal pillar cause distension effect high seam gob side entry ground coal recovery method,
The cause distension effect of thin coal pillar is made full use of, ground coal is made to crush tympanites, backhoe loader digging is selected to adopt ground coal, it is defeated by the formula of reprinting
Machine and ribbon conveyer is sent to transport coal, realizes ground coal recycling complete mechanical.
The above-mentioned purpose of the present invention is realized by following scheme.
A kind of high seam gob side entry ground coal recovery method that distension effect is caused based on thin coal pillar, it is characterised in that：The bottom
Coal recovery method is realized according to the following steps：
（One）Pass through the coal sample of the method for drill hole sampling, at the scene acquisition high seam gob side entry ground coal；
（Two）By step（One）The coal sample of acquirement is processed into standard specimen in laboratory, carries out angle shearing experiment and measures coal sample
Cohesive forceCAnd internal friction angle；
（Three）Thin coal pillar is transferred to the load of high seam gob side entry ground coal：
In formula：For high seam gob side entry ground coal body unit weight, KN/m3；For the thickness of high seam gob side entry ground coal, m；C
For high seam gob side entry bottom plate coal body cohesive force, KPa；For high seam gob side entry ground coal internal friction angle, o；
（Four）The roof caving height in the adjacent goaf of high seam gob side entry：
MFor coal seam thickness, m；kFor the broken swollen coefficient of adjacent erecting dense individual props spoil, 1.1~1.5 are taken；αFor seam inclination, o；
（Five）By the method for mine pressure field measurement, obtain base object model and sillar is broken above the coal column of goaf side
LengthL；
（Six）By step（Three）Gained bottom plate coal body bears thin coal pillar and transfers loadq, step（Four）The adjacent goaf top plate of gained
It is caving heighthAnd step（Five）The base object model side fracture sillar length measuredL, calculate and stay the width for setting thin coal pillar：
In formula：bFor tunnel span, m；hHeight, m are caving for adjacent goaf top plate；LFor base object model above coal column break
Length, m；For roof strata unit weight, KN/m3；MFor coal seam thickness, m；For the disrumpent feelings angle of base object model, o；
（Seven）According to high seam gob side entry clear heightXWith clear spanYDetermine the height of selection mining loader for mineHAnd widthT,
Make；
（Eight）According to step（Seven）The digging dress ability of selected mining loader for mine, selects matched reprinting formula conveyer
And rubber conveyer；
（Nine）Led in high seam gob side entry advance support lane section with the Outer Bottom Plating amount of heaving up to arrangement installation equipment at the section of 0.5m lanes
Mining loader for mine is crossed by the ground coal turn up because being in loose crushing state during the distension of bottom；
（Ten）By step（Nine）The ground coal of turn up is packed into the drag conveyor of mining loader for mine itself, through reprinting formula conveying
Machine is delivered to rubber conveyer, is transported eventually by exploiting field main conveying system.
Further technical solution is：The high seam gob side entry is the lane along roof and coal driving of keeping on file
Road；The coal seam thickness of the high seam is not less than 5m；The high seam gob side entry clear heightXNot less than 4m, clear spanYIt is not less than
5m, coal thickness of keeping on file is not less than 1m；The coal sample length of the collection in worksite high seam gob side entry ground coal is more than 10cm；Coal core
Total length be not less than 1m；The standard specimen that is processed into laboratory is no less than 6；The mating reprinting formula conveyer and
The conveying capacity of rubber conveyer is more than the digging loading amount of mining loader for mine.
A kind of above-mentioned the provided high seam gob side entry ground coal recycling that distension effect is caused based on thin coal pillar of the present invention is provided
Method determines the rational width of thin coal pillar using the method for theoretical calculation, can not only safeguard gob side entry monolithic stability, Er Qieke
It is sufficiently destroyed tunnel ground coal and distension, choosing mining loader for mine will be filled to certainly into the ground coal digging of broken tympanites state
On body drag conveyor, gone on rubber conveyer by reprinting formula conveyer and transported, solve high seam gob side entry ground coal
The problem of high efficiente callback, realizes ground coal mechanization and rapidly and efficiently recycles, and while resource recovery is improved, greatlys improve
High seam thin coal pillar gob side entry plays bottom efficiency, and reliable guarantee is provided for safe and efficient produce of stope.
Description of the drawings
Fig. 1 is the high seam thin coal pillar gob side entry location drawing of the present invention.
Fig. 2 is that ground coal of the present invention digs fortune equipment drawing.
In figure：1-thin coal pillar；2-high seam gob side entry；3-ground coal；4-base object model break above thin coal pillar；
5-adjacent goaf；6-mining loader for mine；7-reprinting formula conveyer；8-rubber conveyer.
Specific embodiment
Specific be described in detail is made to the specific embodiment of invention below.
As described in attached drawing 1 and attached drawing 2, implement a kind of above-mentioned the provided thick coal that distension effect is caused based on thin coal pillar of the present invention
Layer gob side entry ground coal recovery method, the ground coal recovery method follow these steps to carry out：
Step 1: the coal sample by the method for drill hole sampling, at the scene acquisition high seam gob side entry ground coal 3；Wherein, the thickness coal
Layer gob side entry is the tunnel along roof and coal driving of keeping on file, and the coal seam thickness of high seam is not less than 5m；Its high seam
Gob side entry clear heightXNot less than 4m, clear spanYNot less than 5m, coal thickness of keeping on file is not less than 1m；The coal sample length gathered is more than
10cm, the total length of coal core are not less than 1m.
Step 2: the coal sample that step 1 is obtained is processed into standard specimen in laboratory, carries out angle shearing experiment and measure
The cohesive force of coal sampleCAnd internal friction angle；Its coal sample standard specimen processed is no less than 6.
Step 3: thin coal pillar 1 is transferred to the load of high seam gob side entry ground coal 3：
In formula：For high seam gob side entry ground coal body unit weight, KN/m3；Z be high seam gob side entry ground coal 3 thickness, m；CFor high seam gob side entry bottom plate coal body cohesive force, KPa；For high seam gob side entry ground coal internal friction angle, o.
Step 4: the roof caving height in 2 adjacent goaf 5 of high seam gob side entry：
In formula：MFor coal seam thickness, m；kFor the broken swollen coefficient of adjacent erecting dense individual props spoil, 1.1~1.5 are taken；αIncline for coal seam
Angle, o.
Step 5: by the method for mine pressure field measurement, base object model is obtained above the coal column 1 of 5 side of goaf
It is broken the length of sillar 4L。
Step 6: the bottom plate coal body obtained by step 3, which bears thin coal pillar, transfers loadq, adjacent goaf top obtained by step 4
Plate is caving heighthAnd the base object model side fracture sillar length that step 5 measuresL, calculate the width for staying and setting thin coal pillar 1：
In formula：bFor tunnel span, m；hHeight, m are caving for adjacent goaf top plate；LFor base object model above coal column break
Length, m；For roof strata unit weight, KN/m3；MFor coal seam thickness, m；；For the disrumpent feelings angle of base object model, o.
Step 7: according to high seam gob side entry clear heightXWith clear spanYDetermine the height of selection mining loader for mine 6H
And widthT, make。
Step 8: the digging of mining loader for mine 6 according to selected by step 7 fills ability, matched reprinting formula is selected
Conveyer 7 and rubber conveyer 8, wherein described and mining loader for mine mating reprinting formula conveyer and rubber conveyer
Refer to reprinting formula conveyer, digging of the transport capacity more than mining loader for mine of rubber conveyer fills ability.
Step 9: it is installed in high seam gob side entry advance support lane section with the Outer Bottom Plating amount of heaving up to arrangement at the section of 0.5m lanes
Equipment, will be because bottom distension be and the ground coal turn up in loose crushing state by mining loader for mine 6.
Step 10: the ground coal of step 9 turn up is packed into the drag conveyor of mining loader for mine itself, through reprinting
Formula conveyer 7 is delivered to rubber conveyer 8, is transported eventually by exploiting field main conveying system.
It is further described in detail below by specific embodiment come the specific embodiment to the present invention.
Certain colliery coal seam thickness is 6.5m, and gob side entry tunnels along top plate, and tunnel clear height × clear span=4m × 5m is along empty lane
Road, ground coal thickness 2.5m by taking the tunnel as an example, implement a kind of high seam gob side entry ground coal height that distension effect is caused based on thin coal pillar
Recovery method is imitated, determines that method and step is as follows：
Step 1: by the method for drill hole sampling, the coal sample of the high seam gob side entry ground coal is gathered at the scene, is more than
The total length 1.83m of 10cm coal cores.
Step 2: the coal sample that step 1 is obtained is processed into standard specimen 11 in laboratory, angle shearing experiment is carried out
Measure coal sample cohesive forceAnd internal friction angle。
Step 3: thin coal pillar 1 is transferred to the load of high seam gob side entry ground coal 3：
In formula：Take 15KN/m3；Z is 2.5m.CFor 2MPa；For 30o.
Step 4: the roof caving height in 2 adjacent goaf 5 of high seam gob side entry：
In formula：Coal seam thicknessMFor 6.5m；It is caving the broken swollen coefficient of spoilkTake 1.2；Seam inclinationαFor 8o.
Step 5: by the method for mine pressure field measurement, base object model is obtained above the coal column 1 of 5 side of goaf
It is broken the length of sillar 4L=16m；
Step 6: the bottom plate coal body obtained by step 3, which bears thin coal pillar, transfers loadq, adjacent goaf top plate obtained by step 4 collapses
Drop height degreehAnd the base object model side fracture sillar length that step 5 measuresL, calculate the width for staying and setting thin coal pillar 1：
Then coal pillar width takes 10m；Wherein tunnel spanbFor 5m；Roof strata unit weight；Coal seam thicknessMFor
6.5m；Base object model is disrumpent feelings angle。
Step 7: the selection mining digging of ZWY-80/45L types is determined according to high seam gob side entry clear height X=4m and clear span Y=5m
Pick formula, heightH=2.25m and widthT=1.7m, makesX﹣H=1.45m≥1m；Y﹣T=3.m≥3m。
Step 8: the digging of mining loader for mine according to selected by step 7 fills ability 80m3/ h (120t/h), select with
Mating DZQ80/35/11 to reprint the turn-over capacity of formula conveyer be 300t/h and SSJ800/2*40 (B) rubber conveyer
Transport capacity is 400t/h.
Step 9: it is installed in high seam gob side entry advance support lane section with the Outer Bottom Plating amount of heaving up to arrangement at the section of 0.5m lanes
Equipment, will be because bottom distension be and the ground coal turn up in loose crushing state by mining loader for mine.
Step 10: the ground coal of step 9 turn up is packed into the drag conveyor of mining loader for mine itself, through reprinting
Formula conveyer is delivered to rubber conveyer, is transported eventually by exploiting field main conveying system.
Claims (7)
1. a kind of high seam gob side entry ground coal recovery method that distension effect is caused based on thin coal pillar, it is characterised in that：The ground coal
Recovery method is realized according to the following steps：
（One）By the method for drill hole sampling, high seam gob side entry ground coal is gathered at the scene（3）Coal sample；
（Two）By step（One）The coal sample of acquirement is processed into standard specimen in laboratory, carries out angle shearing experiment and measures coal sample
Cohesive force C and internal friction anglez.jpg；
（Three）Thin coal pillar（1）It is transferred to high seam gob side entry ground coal（3）Load：
5.jpg
In formula：z.jpgFor high seam gob side entry ground coal body unit weight, KN/m3；z.jpgFor high seam gob side entry ground coal（3）Thickness,
m；C be high seam gob side entry bottom plate coal body cohesive force, KPa；z.jpgFor high seam gob side entry ground coal internal friction angle, o；
（Four）High seam gob side entry（2）Adjacent goaf（5）Roof caving height：
z.jpg
M is coal seam thickness, m；K is the broken swollen coefficient of adjacent erecting dense individual props spoil, takes 1.1~1.5；α is seam inclination, o；
（Five）By the method for mine pressure field measurement, base object model is obtained in goaf（5）The coal column of side（1）Top is broken
Sillar（4）Length L；
（Six）By step（Three）Gained bottom plate coal body bears thin coal pillar and transfers load q, step（Four）The adjacent goaf top plate of gained
It is caving height h and step（Five）The base object model side fracture sillar length L measured, calculates to stay and sets thin coal pillar（1）Width：
z.jpg
In formula：B be tunnel span, m；H is caving height, m for adjacent goaf top plate；L is base object model break above coal column
Length, m；z.jpgFor roof strata unit weight, KN/m3；M is coal seam thickness, m；1.jpgFor the disrumpent feelings angle of base object model, o；
（Seven）Selection mining loader for mine is determined according to high seam gob side entry clear height X and clear span Y（6）Height H and width
T is spent, is made1.jpg；
（Eight）According to step（Seven）Selected mining loader for mine（6）Digging dress ability, select matched reprinting formula defeated
Send machine（7）And rubber conveyer（8）；
（Nine）Led in high seam gob side entry advance support lane section with the Outer Bottom Plating amount of heaving up to arrangement installation equipment at the section of 0.5m lanes
Cross mining loader for mine（6）By the ground coal turn up because being in loose crushing state during the distension of bottom；
（Ten）By step（Nine）The ground coal of turn up is packed into the drag conveyor of mining loader for mine itself, through reprinting formula conveying
Machine（7）It is delivered to rubber conveyer（8）, transported eventually by exploiting field main conveying system.
2. the high seam gob side entry ground coal recovery method according to claim 1 that distension effect is caused based on thin coal pillar, special
Sign is：The high seam gob side entry is the tunnel along roof and coal driving of keeping on file.
3. the high seam gob side entry ground coal recovery method according to claim 1 that distension effect is caused based on thin coal pillar, special
Sign is：The coal seam thickness of the high seam is not less than 5m.
4. the high seam gob side entry ground coal recovery method according to claim 1 that distension effect is caused based on thin coal pillar, special
Sign is：The high seam gob side entry clear height X is not less than 4m, and clear span Y is not less than 5m, and coal thickness of keeping on file is not less than 1m.
5. the high seam gob side entry ground coal recovery method according to claim 1 that distension effect is caused based on thin coal pillar, special
Sign is：The collection in worksite high seam gob side entry ground coal（3）Coal sample length be more than 10cm；The total length of coal core is not less than
1m。
6. the high seam gob side entry ground coal recovery method according to claim 1 that distension effect is caused based on thin coal pillar, special
Sign is：The standard specimen that is processed into laboratory is no less than 6.
7. the high seam gob side entry ground coal recovery method according to claim 1 that distension effect is caused based on thin coal pillar, special
Sign is：The mating reprinting formula conveyer（7）And rubber conveyer（8）Conveying capacity be more than mining loader for mine
Dig loading amount.
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| Application Number | Priority Date | Filing Date | Title |
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| CN201711235000.XA CN108060921B (en) | 2017-11-30 | 2017-11-30 | Thick coal seam gob-side roadway bottom coal recovery method based on narrow coal pillar heave effect |
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|---|---|---|---|
| CN201711235000.XA CN108060921B (en) | 2017-11-30 | 2017-11-30 | Thick coal seam gob-side roadway bottom coal recovery method based on narrow coal pillar heave effect |
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| CN110130895A (en) * | 2019-05-27 | 2019-08-16 | 太原理工大学 | It is a kind of to weaken the coal column destruction methods for leaving coal column Latent destruction face |
| CN110318756A (en) * | 2019-07-18 | 2019-10-11 | 西安科技大学 | A kind of calculation method of shallow thin bedrock gob side entry driving thin coal pillar width |
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| CN110318756A (en) * | 2019-07-18 | 2019-10-11 | 西安科技大学 | A kind of calculation method of shallow thin bedrock gob side entry driving thin coal pillar width |
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| Publication number | Publication date |
|---|---|
| CN108060921B (en) | 2020-11-24 |
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