CN109339856A - A kind of method that face gas is administered - Google Patents
A kind of method that face gas is administered Download PDFInfo
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- CN109339856A CN109339856A CN201811439456.2A CN201811439456A CN109339856A CN 109339856 A CN109339856 A CN 109339856A CN 201811439456 A CN201811439456 A CN 201811439456A CN 109339856 A CN109339856 A CN 109339856A
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- 238000000034 method Methods 0.000 title claims abstract description 35
- 238000000605 extraction Methods 0.000 claims abstract description 107
- 238000005553 drilling Methods 0.000 claims abstract description 85
- 239000003245 coal Substances 0.000 claims abstract description 58
- 238000010276 construction Methods 0.000 claims abstract description 27
- 230000008569 process Effects 0.000 claims abstract description 9
- 238000009423 ventilation Methods 0.000 claims abstract description 5
- 238000005096 rolling process Methods 0.000 claims description 7
- 238000005520 cutting process Methods 0.000 claims description 6
- 239000000203 mixture Substances 0.000 claims description 2
- 230000000694 effects Effects 0.000 abstract description 11
- 239000002893 slag Substances 0.000 abstract description 5
- 230000026676 system process Effects 0.000 abstract description 2
- 238000007789 sealing Methods 0.000 description 26
- VNWKTOKETHGBQD-UHFFFAOYSA-N methane Chemical compound C VNWKTOKETHGBQD-UHFFFAOYSA-N 0.000 description 16
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 description 15
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- 238000009825 accumulation Methods 0.000 description 4
- 238000004458 analytical method Methods 0.000 description 4
- 238000010586 diagram Methods 0.000 description 4
- 238000005086 pumping Methods 0.000 description 4
- 238000007569 slipcasting Methods 0.000 description 4
- 239000004047 hole gas Substances 0.000 description 3
- 239000011435 rock Substances 0.000 description 3
- 239000000243 solution Substances 0.000 description 3
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- 230000008859 change Effects 0.000 description 1
- 239000003610 charcoal Substances 0.000 description 1
- 239000003034 coal gas Substances 0.000 description 1
- 239000011248 coating agent Substances 0.000 description 1
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Classifications
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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
- E21F7/00—Methods or devices for drawing- off gases with or without subsequent use of the gas for any purpose
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- Engineering & Computer Science (AREA)
- Mining & Mineral Resources (AREA)
- Life Sciences & Earth Sciences (AREA)
- General Life Sciences & Earth Sciences (AREA)
- Geochemistry & Mineralogy (AREA)
- Geology (AREA)
- Earth Drilling (AREA)
Abstract
The present invention provides a kind of face gas administer method, the part gas in High Position Drilling extraction coal seam and top plate, the part gas of pipe laying pipeline extraction goaf upper corner, remaining gas from mine ventilation system discharge.The process of High Position Drilling extraction part gas is: suction road tunnel to away from cut stop at a N meters dig (N >=100), stopping digging positive head expansion brush top plate drill site, multiple groups of constructing in drill site drilling, multiple groups drilling sequential from top to bottom, every group of drilling is made of at least one lower round, at least one low level hole, at least one high-order hole, the low concentration gas of lower round and low level hole extraction goaf, the high concentration gas of high-order hole extraction fissure zone.The cash slag that top plate high drainage roadway generates of constructing is few, can almost disregard effect on coal quality；Construction top plate high drainage roadway and system process are simple, and device therefor is single.
Description
Technical field
The present invention relates to a kind of methods that gas control field more particularly to face gas are administered.
Background technique
The difficult point of comprehensive extracting and caving face gas control is how prevention work face gas at upper corner transfinites, and is used at present
Although low level rock suction road extraction goaf gas thoroughly solves face upper corner angle gas exceeding limit problem, cost
Height, while it is nervous to cause digging to connect.Especially low level suction road layer position is low (within 10 meters of roof), needs the mixed of extraction
Resultant is larger, to fully control the gas density in low level suction road and be no more than 5%, difficulty is also very big, and low level suction road gas exists
There is also unsafe factors within the scope of explosion ratio.
In view of this, being badly in need of providing a kind of Gas Full-Mechanized Caving Face improvement new technology, to solve low level suction road extraction watt
This at high cost, unsafe problem.
Summary of the invention
In order to overcome the shortcomings of low level suction road gas when administering gas there are at high cost, gas drainage under suction difficulty is big, this
Invention provides a kind of method that face gas is administered, and puts in working face mining high methane is thin coal bed fully-mechanized, is bored using a high position
The part gas that hole substitutes suction road extraction coal seam and top plate discharges, the part gas of pipe laying pipeline extraction goaf upper corner,
Remaining gas is then discharged from mine ventilation system.
Realize that the technical solution of the object of the invention is as follows:
A kind of method that face gas is administered, the part gas in High Position Drilling extraction coal seam and top plate, pipe laying pipeline extraction are adopted
The part gas of dead zone upper corner, remaining gas are discharged from mine ventilation system.The present invention solves face upper corner angle gas
Overrun issues realize and cancel girdle high methane fully mechanized coal face high position gas stone head, reduce excavation cost, alleviate mine
Well digging connects, and achievees the purpose that safe and efficient production.
As a further improvement of the present invention, the process of High Position Drilling extraction part gas is: suction road tunnel to
Stop to dig (N >=100) at a N meters away from cutting, is stopping digging positive head expansion brush top plate drill site, multiple groups of constructing in drill site drill, described in multiple groups
Drill sequential from top to bottom, and every group of drilling is by least one lower round, at least one low level hole, at least one high-order hole group
At, the low concentration gas of the lower round and low level hole extraction goaf, the high concentration gas of the high position hole extraction fissure zone.
As a further improvement of the present invention, the top plate drill site passes through horizontal river and perforation of rolling back and rationalizing, the end rolled back and rationalized
Equipped with cutting eye, described to cut eye vertical with rolling back and rationalizing.
As a further improvement of the present invention, the lower round across strike is rolled back and rationalized lower side 3m ~ 42m, and institute away from working face
It states lower round and cuts eye perforation (beating).
As a further improvement of the present invention, the whole hole point across strike in the low level hole away from working face roll back and rationalize lower side 0m ~
The whole hole pitch of holes of 42m, the low level hole are 6m ~ 7m.
As a further improvement of the present invention, the whole hole point across strike in the high-order hole away from working face roll back and rationalize coal wall 3.5m ~
The whole hole pitch of holes of 45.5m, the high position hole are 7m.
As a further improvement of the present invention, N=120, the distance that the top plate drill site distance cuts eye is 120m.
As a further improvement of the present invention, the height of the high-order pitch-row coal top plate is 30m, the low level pitch-row coal top
The height of plate is 10m, the lower round and cuts eye and beats.
Compared with prior art, the beneficial effects of the present invention are:
1, the slag that construction top plate high drainage roadway of the invention generates is few, can almost disregard effect on coal quality；
2, construction top plate high drainage roadway of the invention and system process are simple, and device therefor is single；
3, the present invention, which realizes, cancels girdle high methane fully mechanized coal face high position gas stone head, reduces excavation cost, delays
It solves coal mine excavation to connect, achievees the purpose that safe and efficient production.
Detailed description of the invention
Fig. 1 is top plate high drainage roadway construction schematic diagram one；
Fig. 2 is the construction schematic diagram two of top plate high drainage roadway；
Fig. 3 is the construction schematic diagram three of top plate high drainage roadway；
When Fig. 4 is that working face day advance rate reaches 4m or more, face gas gushes out situation line chart；
Fig. 5 is working face day advance rate when being 3 ~ 4m, and face gas gushes out situation line chart；
Fig. 6 is working face day advance rate when being 2 ~ 3m, and face gas gushes out situation line chart；
Fig. 7 is the structural schematic diagram of extraction drilling and sealing.
Wherein, 100, drill site；200, Heng Chuan；300, it rolls back and rationalize；400, eye is cut；500, suction road；600, coal top plate (forecasting coal
Layer)；10, pressure release coal seam；20, it transports suitable；30, low level hole (hole 1#-7#)；40, high-order hole (hole 8#-14#)；50, straight band；60,
Fissure zone；70, warp damage；80, lower round (hole 15#-21#)；1, it drills；2, plug；21, the first plug；22, second is stifled
Head；3, cement slurry.
Specific embodiment
The present invention is described in detail for each embodiment shown in reference to the accompanying drawing, but it should be stated that, these
Embodiment is not limitation of the present invention, those of ordinary skill in the art according to these embodiments made by function, method,
Or equivalent transformation or substitution in structure, all belong to the scope of protection of the present invention within.
In the description of the present embodiment, it is to be understood that term " center ", " longitudinal direction ", " transverse direction ", "upper", "lower",
The orientation or positional relationship of the instructions such as "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outside" is
It is based on the orientation or positional relationship shown in the drawings, is merely for convenience of description the invention and simplifies description, rather than indicate
Or imply that signified device or element must have a particular orientation, be constructed and operated in a specific orientation, therefore cannot understand
For the limitation to the invention.
Embodiment 1:
2403 be two second working face of the panel east wing, the exploitation coal seam 4-2#, 4.3 ~ 10.28m of coal seam thickness, average coal thickness 8m,
Working face strike length is 1908m, and can adopt strike length is 1768m, tilt length 240m, using moving towards longwell retrusive fully mechanized mining
Top coal caving method, whole caving methods manage top plate.The original gas bearing capacity in working face reality side coal seam is up to 4.72m3/t, and
Gas bearing capacity across pitch is totally in gradually smaller trend from outside to inside.
Gas source is single during 2403 working face extractions, mainly from this coal seam.Watt gushed out during working face extraction
This can be divided into four aspects: first is that from the gas adopting coal breakage charcoal and gushing out;Second is that the gas that let-down coal is gushed out;Third is that working face coal
The gas that wall is gushed out;Fourth is that the gas that Residual coal in goaf is gushed out.
Section 120m is using " top plate high drainage roadway+then set pipe laying " in working face, remaining region is using " concordant hole+high pumping
Lane+after set pipe laying " gas govenance.Section 120m regional gas control scheme is specific as follows in working face:
(1) cancel suction road, using " top plate high drainage roadway+then set pipe laying " extraction, carry out that top plate high drainage roadway substitution is high to take out
Lane extraction.
Eye is cut in suction road eastern section, and reserved 120m is not dug outward, and construction high-low position item plate high drainage roadway substitutes suction road, extraction
The highly concentrated gas of face roof fissure zone and the low-concentration gas in goaf, while pipe laying extraction of setting after being aided with solve back production
It sets after period and return Gas, prevents gas exceeding limit.
(2) top plate high drainage roadway design scheme
Drilling technique parameter designing: 2403 suction roads are tunneled to stopping digging at 120m away from cutting, and are expanded brush top plate stopping digging positive head and are bored
, and utilize horizontal river and perforation of rolling back and rationalizing.Drill site specification: 3.5 meters long, 4.0 meters wide, 3.5 meters high.It constructs in drill site three groups of brills
Hole, every group 7, totally 21 holes (aperture 133mm), drilling design whole project are 2698.2m.Two groups of low levels drill, are one group high
Position drilling.The low-concentration gas in two groups of low level holes extraction goaf, wherein bottom one group of hole and cut eye and beat, the one group of end hole in centre
Position is at upward 10 meters of roof, and topmost one group of highly concentrated gas for high-order hole extraction fissure zone, whole hole are pushed up in coal seam
The upward 30 meters of positions of plate.
1, low level drills
Low level drilling is low level hole, and low level hole designs two groups, away from work in one group of hole (an intermediate row) whole hole point across strike plane
Roll back and rationalize coal mining side 0m-42m in face, and whole hole height is away from 4-2# coal top plate 10m, away from working face in one group of hole (most descending row) across strike plane
Roll back and rationalize coal mining side 3m ~ 42m, beats with lane side on the right side of eye is cut.Whole hole pitch of holes is 6 ~ 7 meters.
2, High Position Drilling
High Position Drilling is high-order hole, and high-order hole designs one group (most upper row), rolls back and rationalize and adopt away from working face in whole hole point across strike plane
Coal helps the 5m of 3. 5m ~ 45.;Whole hole height is away from coal top plate 30m;Whole hole pitch of holes is 7 meters.
3, hole-sealing grouting
Drilling is using " two stifled a note " technique sealing of hole, sealed borehole length 10m or more, aperture within the scope of inner 15m for φ 900mmPVC
Real pipe, 15m is with inner whole lower φ 75mmPVC screen casing.
4, aperture sequence
Top plate high drainage roadway aperture sequence be from top to bottom, from a left side and soil is applied on the right side.I.e. first construct the hole 8#, finally construct the hole 21#.
5, construct device therefor and manning requirements
Make face geological conditions according to top plate high drainage roadway design parameter and 2403 fourths, determines to use ZDY4000S type mining hydraulic
Underground drill rig, BW -350 slush pump carry out drilling construction.
(3) top plate high drainage roadway condition of construction
In conjunction with top plate high drainage roadway design requirement and operation field various factors, practice of construction drilling sequences are as follows: 15#-1#-8#-
9#-2#--16#-17.....#-21#。
Completion of Drilling Hole technique: each drilling must be secondary pore-forming.First crept into using φ 94mm drill bit to projected depth,
It reuses φ 133mm drill bit and carries out secondary whole reaming.According to 15#, 1#, 8#, 9# drilling construction progress and equipment operation
The problems such as (high-order hole there are drilling machine loads big, rate of penetration is slow), the present embodiment improves Completion of Drilling Hole technique, high-order
Hole construction uses secondary pore-forming, and low level hole uses one-step pore-creating.By the improvement to drill construction technique, drilling is substantially reduced
The pore-forming period.
Bore angle: live unwrapping wire is carried out according to design parameter before drilling aperture.Middle line is first given, then is surveyed using half-round compasses
Amount, given drilling perforated parameters.
(4) sealing of hole, slip casting
1, lower guard aperture screen casing
Drilling is using " two stifled a note " hole-sealing technology, sealed borehole length 15m, aperture with inner 15m hole sealing tube for φ 90mmPVC casing,
15m carries out guard aperture with inner whole lower φ 75mmPVC screen casing.
Lower guard aperture screen casing early period will use manpower, after be changed to using drilling machine " push pipe ", effect is fine.Row is most descended in high-order drill site
Hole is to bow hole, above two rounds be uphole.Bow Kong Yinkong internal water accumulation and rock slag it is more, be affected to lower guard aperture screen casing.Wherein
1# (uphole), 15# (hole of bowing) are all made of manpower down tube mode, more than 10 root of guard aperture screen casing under 15#, guard aperture screen casing 46 under the hole 1#
Root;Since the hole 8#, lower guard aperture screen casing mode is had adjusted, that is, utilizes drilling machine " push pipe ", is slowly promoted into hole, at one stroke from 46
It is promoted to 70 or more.
2, sealing of hole
In practice of construction, it is desirable that drilling " makes a call to 1, seal 1 ".Sealing of hole requires lining section in hole to be equipped with 3 groups of polyurethane adhesives (three black three
It is white), aperture is equipped with 3-4 group polyurethane adhesive.Since what is taken when construction early period is first to descend 75mm guard aperture screen casing, rear lower 90m sealing of hole
Casing, it is difficult larger in lower 90mm sealing of hole casing because of the factors such as angle, rock slag influence in hole, 3 are at most filled in hole, is reached
Requirement less than sealing of hole 10m or more.In addition lower row bows, and Kong Yinkong internal water accumulation is more to affect polyurethane sealing of hole effect, individual to drill
Fail to seal completely in fact, aperture still has a small amount of ponding to flow out after sealing of hole.Improvement is then passed through, determines first to use 90mm casing sealing of hole 10m
More than, then lower 75mm guard aperture screen casing, solve the problems, such as that sealed borehole length is inadequate, and do not find that there is flowing water phenomenon in aperture.
Drilling " making a call to 1, seal 1 " in the present embodiment, wherein the detailed process of sealing of hole is set respectively at the both ends of drilling
Plug is set, preferably plug is polyurethane, and polyurethane is placed in the end of drilling, and the sealing of hole that then foams, expansion are simultaneously condensed into plug.
It is preferred that the length of plug is at least 2m.
The present embodiment is in the detailed process that plug is respectively set in the both ends of drilling: first at drilling orifice x rice
First plug (x >=12) are set, the second plug then are set in drilling orifice, so that between the first plug and the second plug most
Short distance is greater than 10m, and the purpose being arranged in this way is easy for finally Grouting Pipe being used to inject between the first plug and the second plug
Cement slurry, and wait cement slurry sets.
It is preferred that further including the steps that the step of placing extraction pipeline, placing extraction pipeline before borehole sealing specifically:
The pipeline to draw out methane is placed in drilling, the length of the extraction pipeline is greater than 40m, and the internal diameter of the extraction pipeline, which is at least, to drill
The half of internal diameter.The gas of the present embodiment carries out extraction by extraction pipeline, and extraction pipeline is placed in the middle part of gas, plug application
In gas drainage under suction, sealing of hole, using grouting pump grouting pressure, first by the pouch at plug both ends full of slurries, both ends expansion after cement
Re-closed intermediate gap is starched, sealing effect is preferable.It is preferred that the aperture to drill is managed in fact with PVC within the scope of inner 15m, 15m is with inner whole process
PVC screen casing is set, and cement slurry is filled in PVC and manages between the hole wall of drilling in fact.
It is preferred that suction road is tunneled to stopping to dig (N >=100) at N meters away from cutting, expand brush top plate drill site stopping digging positive head, in drill site
Interior construction multiple groups drilling, sequential, every group of drilling descend round, at least one low level by least one from top to bottom for multiple groups drilling
Hole, at least one high-order hole composition, the low concentration gas of lower round and low level hole extraction goaf, high-order hole extraction fissure zone
High concentration gas.It is preferred that lower round, low level hole, high-order hole two apertures be equipped with the first plug and the second plug, and the
Grout injection between one plug and the second plug.
Sealing of hole is improved in the present embodiment, improves gas drainage under suction concentration.Inhaling as tunneling hole is dissipated by original Mary, poly- peace
Rouge sealing of hole is improved to cement slurry sealing of hole, penetrates into cement slurry in the case where suppressing in the gap around hole, reduces gas leakage.This implementation
After example extraction drilling is changed to cement mortar sealing of hole, extraction concentration is set to be increased to 12% or more by original 4%-5%, to improve
Drainage efficient.Sealing of hole investment is reduced, 50 yuan of investment is reduced in every hole.
3, slip casting
In view of factors such as the narrow, construction safeties of working space before construction, the present embodiment is using unified after the completion of sealing of hole hole to be drilled
The mode of slip casting completes mortar depositing construction.The present embodiment injects cement slurry, the slip casting of cement slurry in the inside of plug using Grouting Pipe
Length is greater than 10m.Infiltration section of the present embodiment in extraction hole uses cement slurry sealing of hole, and cement slurry is made to penetrate into hole week in the case where suppressing
In the gap enclosed, reduce gas leakage.It is preferred that the present embodiment injects cement between the first plug and the second plug using Grouting Pipe
Slurry, and wait cement slurry sets.
(5) gas control effect analysis
1, face gas gushes out situation
To have analyzed the gas control effect since the production of 2403 fully mechanized coal faces, i.e. top plate high drainage roadway+set pipe laying comprehensively
Gas control mode extracting result is divided into following 3 kinds of situations according to stoping strength difference according to working surface production situation:
(1) when working face day advance rate reaches 4m or more, it is as shown in Figure 4 that face gas gushes out situation.Working face day, advance rate reached
When 4m or more, maximum functional face absolute gas emission rate 8.8m3/min, mash gas extraction scale 6.5m3/min, wherein roof hole is taken out
4.9m3/min is adopted, set pipe laying extraction 1.6m3/min, and roof hole extraction scale accounts for the 75% of total extraction amount, working face wind row watt
2.3 m3/min of this amount, return gas density 0.26%, the gas density that sets 0.32%.
Top plate drilling extraction single hole mixed traffic between 5 ~ 11.5 m3/min, single hole gas density 0.1 ~ 10% it
Between, between the 12.4 ~ 35.1Kpa of negative pressure of aperture, in bye-pass between gas density 0.2 ~ 6.05%, mixed traffic 21.6 ~ 195.6
m³/min。
(2) when working face day advance rate is 3 ~ 4m, face gas gushes out situation as shown in figure 5, the absolute gas of working face
6.5 m3/min of outburst amount, 4.08 m3/min of mash gas extraction scale, wherein roof hole extraction 3.18/min, pipe laying extraction of setting
0.9 m3/min, roof hole extraction scale account for 7% or more of total extraction amount.2.42 m3/min of working face wind resource assessment amount or so,
Return gas density 0.25% or so, the gas density that sets 0.30% or so.
Top plate drilling extraction single hole mixed traffic is between 3.2 ~ 10.5 m3/min, and single hole gas density is 0.6 ~ 7.3%
Between, between the 12.6 ~ 33.4Kpa of negative pressure of aperture, in bye-pass between gas density 0.4 ~ 4.9%, mixed traffic 68.9 ~
206.2m³/min。
(3) when working face day advance rate is 2 ~ 3m, face gas gushes out situation as shown in fig. 6, working face day advance rate 2
When ~ 3m, 6.2 m3/min of working face absolute gas emission rate or so, mash gas extraction scale 3.95m3/min, wherein roof hole is taken out
3.05m3/min is adopted, set pipe extraction 0.9m3/min, and roof hole extraction scale accounts for the 77% of total extraction amount.Working face wind resource assessment
Measure 2.25m3/min, one's intention as revealed in what one says stream gas density 0.2% or so, 0.3% or less the gas density that sets.
Top plate drilling extraction single hole mixed traffic is between 4.3 ~ 11.2 m3/min, and single hole gas density is 0.5 ~ 5.8%
Between, between 12.6 ~ 30.4 Kpa of aperture negative pressure, in bye-pass between gas density 0.6 ~ 5.1%, mixed traffic 49.9 ~
178.5 m³/min。
(2) gas control effect
Gas emission is overall smaller during fully mechanized coal face produces, and is primarily present following several respects reason:
First is that coal wall Support inner top panel is small by mining influence, and goaf top plate inbreak is insufficient, crack during working face is just adopted
Agensis, drilling gas channel are unsmooth, it is difficult to which extraction high concentration gas, extraction flow do not increase yet；Second is that section coal in working face
Layer relatively thin (3 ~ 5m of coal thickness), gas bearing total amount is relatively small and intensity is lower back；Third is that cut eye-shaped it is longer at the time and return
It is slow to adopt advance rate, cutting eye, nearby coal gas passes through crack Spontaneous release a part;Fourth is that face gas is derived only from this
Coal seam, without other supply sources.
2, the correlation analysis of drilling whole aperture layer position and extraction concentration
2403 top plate high drainage roadways are constructed in three groups of drillings (21 holes) altogether, wherein two groups of low level drillings, one group of High Position Drilling.Two groups
The low-concentration gas in low level hole extraction goaf, wherein bottom 1 group of hole is located at roof, intermediate one group of borehole bottom location is in coal
At the upward 10m of layer top plate, highly concentrated gas of one group of the top for high-order hole extraction fissure zone, whole hole is in the upward 30m of roof
Position.
It is located at 18 ~ 22m according to single hole extraction quantitative statistics result and whole hole respective heights analysis, top plate drilling end hole height
Between extraction concentration highest, take second place between 6 ~ 18m, when whole hole height is located at 6m or less, extraction concentration is worst.I.e. high-order hole extraction
Effect is best, and intermediate row low level hole is taken second place, and lower round is relatively worst.The analysis of causes: the shifting of overlying strata in coal work face goaf
It is dynamic to destroy, it is typically divided on straightening direction " three bands ", i.e. caving zone, fissure zone, warp damage (as shown in Figure 2).It splits
Gap band and caving zone are the main thoroughfares of one of space of methane accumulation and Gas Flow.In its natural state, due to watt
This density ratio air is small, and meeting nature floats, and is present in mining induced fissure.The borehole bottom location of top plate drilling is arranged in caving zone or more
Seam area in, and be in 0 type circle middle and upper part, so using extraction pump negative pressure power to drilling carry out extraction, be equivalent to
A negative pressuren zone is formed in drilling terminal, gas has been truncated and has flowed to coal working face channel, has changed flow field in goaf distribution, makes
A large amount of goaf gas is drilled into extraction system, is reduced goaf gas and is gushed out to what is set after working face, reduces back
The gas density that mining face sets with air return lane.
Two groups of low level holes are designed in 2403 top plate drillings altogether, wherein most descending round layer position to be located at roof, with work
Promote forward, immediate roof starts to be caving, and two groups of low level holes are within the scope of caving zone, cause low level hole directly with it is mined out
Area's air communicates, and extraction air keeps hole pumping and mining concentration relatively low, and extracting result is bad.It is old to eject with person's working face first weighting
Existing crack, high-order hole extracting result are gradually shown, and top plate drilling gas is taken out beam concentration and is also stepped up.According to above-mentioned analysis
Preliminary judgement: 2403 working face roof caving zone height are 18m or so, and one section of section thereon is fissure zone.
From construction period, number, (being operated by the team's construction manpower of mine extraction at this stage and personnel horizontal) construction top plate
The high drainage roadway duration is longer, less input for number, and construct 120 meters of suction road short time limits, numbers are more;From capital investment, construction
Top plate high drainage roadway need to inject capital into 82.9 ten thousand yuan, and construction suction road need to inject capital into 960,000 yuan, move towards to bore compared to construction top plate
Cost-saved 130,000 yuan of hole.From coal quality, the cash slag that construction top plate high drainage roadway generates is few, almost may not be used to effect on coal quality
Meter;And suction road of constructing generates a large amount of spoils, it is larger to effect on coal quality.From production link, constructing top plate high drainage roadway and is
Process of uniting is simple, and device therefor is single, suction road process of constructing and system complex, device therefor diversification.
2403 face roof high drainage roadways substitute traditional suction road extraction, and the absolute gas Pu output of working face is 5 ~
7m3/min, return air gas density be held in 0.3% hereinafter, after the gas density that sets be maintained between 0.24 ~ 0.34%, do not go out
Existing gas alarming, transfinite accident.It is effective that top plate high drainage roadway, which substitutes suction road extraction in the working face,.
Embodiment 2:
On the basis of embodiment 1, present embodiment discloses a kind of method that face gas is administered, High Position Drilling extraction coal seams
With the part gas of top plate, the part gas of pipe laying pipeline extraction goaf upper corner, remaining gas is arranged from mine ventilation system
It puts.The present embodiment solves the problems, such as face upper corner angle gas exceeding limit, realizes and cancels girdle high methane fully mechanized coal face height
Position gas stone head, reduces excavation cost, alleviates coal mine excavation and connects, achievees the purpose that safe and efficient production.
It is preferred that the process of High Position Drilling extraction part gas is: suction road tunnel to away from cut stop at a N meters dig (N >=100),
Expand brush top plate drill site stopping digging positive head, multiple groups of constructing in drill site drilling, multiple groups drilling sequential from top to bottom, every group of drilling
It is made of at least one lower round, at least one low level hole, at least one high-order hole, lower round and low level hole extraction goaf
Low concentration gas, the high concentration gas of high-order hole extraction fissure zone.
It is preferred that top plate drill site, by horizontal river and perforation of rolling back and rationalizing, the end rolled back and rationalized is equipped with and cuts eye, it is vertical with rolling back and rationalizing to cut eye.
It is preferred that lower round across strike is rolled back and rationalized lower side 3m ~ 42m away from working face, and lower round and cuts eye and penetrate through (beating).
It is preferred that the whole hole point across strike in low level hole is rolled back and rationalized lower side 0m ~ 42m away from working face, the whole hole pitch of holes in low level hole is
6m~7m。
It is preferred that the whole hole point across strike in high-order hole is rolled back and rationalized coal wall 3.5m ~ 45.5m away from working face, the whole hole pitch of holes in high-order hole
For 7m.
It is preferred that N=120, the distance that top plate drill site distance cuts eye is 120m.
It is preferred that the height of high-order pitch-row coal top plate is 30m, the height of low level pitch-row coal top plate is 10m, lower round and cuts eye
It beats saturating.
Embodiment 3:
Mash gas extraction is the main contents of gas control in high gas layer and projecting coal bed recovery process, is prevention coal mine watt
The core of this accident.Current coal bed gas extraction mainly uses boring method and two kinds of tunnel method.The mountain Chen Jia mining area belongs to high methane
Mine, it is " based on extraction, supplemented by wind row " to need a large amount of drilling of constructing during gas control, have that mine gas, which is administered,
Region takes out in advance, dig preceding pre- pumpings, inhaling as tunneling, pre-mining drainage, adopts rear release etc. and drills.
The drilling constructed during gas control, relatively common is Sunken wire tube connection, Sunken wire tube using flexible rubber hose,
Flexible rubber hose is easy to happen air leakage and water accumulation situation when in use.Sunken wire tube is destroyed and gas leakage situation occurs, and on the one hand may draw
Safety accident is sent out, on the other hand causes the negative pressure of suction in drilling to be lower because of gas leakage, influences the gas drainage results of gas.Because will be more
After a drilling connect with Sunken wire tube, then with extraction supervisor's connection, when gas drainage under suction, because ponding easily occurs for impeded drainage in Sunken wire tube
Situation also will affect the gas drainage results of gas.In operation, because of environmental factor coal seam sinking or deformed, it may appear that flexible glue
Pipe deformation, causes extraction pipeline to influence the gas drainage results of gas because squeezing blocking.
Based on this, on the basis of embodiment 1 and embodiment 2, present embodiment discloses a kind of watts applied in drilling
This extraction assembling pipe joint.Including connecting pipe, connecting pipe one end and extraction supervisor are connected, other end pressurizing window.Even
The top in adapter tube road is connected to several extractions drilling, and the lower part of connecting pipe is equipped with water trap.Connecting pipe includes the first company
Adapter tube, several second connecting tubes being fixedly connected with the first connecting tube.First connecting tube is hard tube, is set in the first connecting tube
The connection short tube for having several to communicate with the first connecting tube, connection short tube nozzle are equipped with ring flange.Second connecting tube one end with
Extraction drilling connection, the other end be equipped with ring flange and with connect short tube flanged joint.Divide on extraction supervisor and the second connecting tube
Not She You valve, valve is for closing or be connected to gas drainage pipeline.
Wherein, for the ease of production, to prevent connection short tube and the first connecting tube from leading because of the sinking in coal seam or collapse due to
Cause to destroy, and convenient for dismantling connection short tube and the first connecting tube after the completion of operation, connection short tube and the first connecting tube integrally at
Type is made.
Wherein, connection short tube has 2 ~ 15, and the setting of multiple short tubes in the first connecting tube is convenient in operation according to extraction
The quantity of drilling and position and the number of the suitable connection short tube of distribution selection.
Wherein, the first connecting tube and connection short tube are steel pipe, and steel pipe is equipped with erosion resistant coating.
Wherein, being equipped with flowmeter and vacuum table in the second connecting tube can basis by the setting of flowmeter and vacuum table
The size of gas density that flowmeter show in extraction drilling carries out closing and open-minded, can also be according to the negative pressure that vacuum table is shown
Height situation selects multiple extraction drilling extraction or independent extractions simultaneously to extraction drilling.Meanwhile by valve, flowmeter, negative
Pressure table is arranged in the second connecting tube, can be facilitated when valve, flowmeter, vacuum table are destroyed and be dismantled the second connecting tube
Valve, flowmeter, vacuum table are replaced afterwards.
Wherein, water trap is located at the central lower of the first connecting tube, and is connected to the first connecting tube.Water trap setting is existed
The central lower of first connecting tube can make the water for drilling into the first connecting tube through extraction flow out the first connecting tube and enter draining
Device, preventing water from gathering in the first connecting tube causes the first connection blockage or ponding to be drawn into extraction supervisor.
It is preferred that water trap is located at the first connecting tube lower part, and it is connected to the end of the first connecting tube and extraction supervisor.It avoids
It needs to simplify the manufacture craft of the first connecting tube in the first connecting tube upper opening.Meanwhile in extraction supervisor in extraction drilling
When gas carries out extraction, water, which constantly can flow and enter to extraction supervisor direction along the first connecting tube under suction, to be put
In hydrophone, water can be further prevented, which to gather in the first connecting tube, causes the first connection blockage and water accumulating volume excessive and be drawn into
In extraction supervisor.
Multiple drillings are connect with connecting pipe by the present embodiment respectively, can effectively control the pumping of gas in each drilling
It puts.By closing the low drilling of gas density, and then the negative pressure of suction of other drillings is improved, to improve gas
Drainage efficient.Valve is arranged in the second connecting tube the present embodiment, in valve damage, does not need suspension of works operation, only
It is replaced after the second connecting tube need to being dismantled.
The step of the present embodiment gas drainage under suction and principle are: firstly, the first connecting tube is placed in extraction drilling lower part, will take out
Put supervisor, the first connecting tube, connection short tube, the second connecting tube, extraction drilling, tailrace connect；Secondly, opening extraction supervisor
And the second valve in connecting tube, it opens drainage pump and draws out methane；Again, Gas-Flow meter, the number on negative pressure ball valve table are observed
The low extraction of gas density is drilled close in time by value variation, to improve the negative pressure value of other extractions drilling；Finally, according to putting
Water situation in hydrophone excludes the water in tailrace in time.
The series of detailed descriptions listed above only for feasible embodiment of the invention specifically
Protection scope bright, that they are not intended to limit the invention, it is all without departing from equivalent implementations made by technical spirit of the present invention
Or change should all be included in the protection scope of the present invention.
It is obvious to a person skilled in the art that invention is not limited to the details of the above exemplary embodiments, Er Qie
In the case where without departing substantially from spirit or essential attributes of the invention, the present invention can be realized in other specific forms.Therefore, no matter
From the point of view of which point, the present embodiments are to be considered as illustrative and not restrictive, and the scope of the present invention is by appended power
Benefit requires rather than above description limits, it is intended that all by what is fallen within the meaning and scope of the equivalent elements of the claims
Variation is included within the present invention.Any reference signs in the claims should not be construed as limiting the involved claims.
In addition, it should be understood that although this specification is described in terms of embodiments, but not each embodiment is only wrapped
Containing an independent technical solution, this description of the specification is merely for the sake of clarity, and those skilled in the art should
It considers the specification as a whole, the technical solutions in the various embodiments may also be suitably combined, forms those skilled in the art
The other embodiments being understood that.
Claims (8)
1. a kind of method that face gas is administered, which is characterized in that the part gas in High Position Drilling extraction coal seam and top plate buries
The part gas of pipe pipeline extraction goaf upper corner, remaining gas are discharged from mine ventilation system.
2. the method that face gas according to claim 1 is administered, which is characterized in that High Position Drilling extraction part
The process of gas is: suction road is tunneled to stopping digging at N meters away from cutting, N >=100, expands brush top plate drill site stopping digging positive head, in drill site
The drilling of interior construction multiple groups, drill described in multiple groups sequential from top to bottom, every group of drilling by least one lower round, at least one
Low level hole, at least one high-order hole composition, the low concentration gas of the lower round and low level hole extraction goaf, the high position hole
The high concentration gas of extraction fissure zone.
3. the method that face gas according to claim 2 is administered, which is characterized in that the top plate drill site passes through horizontal river
With perforation of rolling back and rationalizing, the end rolled back and rationalized is equipped with and cuts eye, and described to cut eye vertical with rolling back and rationalizing.
4. the method that face gas according to claim 3 is administered, which is characterized in that the lower round across strike is away from work
It rolls back and rationalize lower side 3m ~ 42m as face.
5. the method that face gas according to claim 3 is administered, which is characterized in that the whole hole point edge in the low level hole
Tendency is rolled back and rationalized lower side 0m ~ 42m away from working face, and the whole hole pitch of holes in the low level hole is 6m ~ 7m.
6. the method that face gas according to claim 3 is administered, which is characterized in that the whole hole point edge in the high position hole
Tendency is rolled back and rationalized coal wall 3.5m ~ 45.5m away from working face, and the whole hole pitch of holes in the high position hole is 7m.
7. the method that face gas according to claim 2 is administered, which is characterized in that the top plate drill site distance cuts eye
Distance be 120m.
8. the method administered according to the described in any item face gas of claim 2-7, which is characterized in that the high position pitch-row
The height of coal top plate is 30m, and the height of the low level pitch-row coal top plate is 10m, the lower round and cuts eye and beats.
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Cited By (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN109973140A (en) * | 2019-04-11 | 2019-07-05 | 河南理工大学 | A kind of first mining height effect gas pumping method of high prominent mine large-mining-height working surface |
| CN110685734A (en) * | 2019-10-24 | 2020-01-14 | 中煤科工集团西安研究院有限公司 | Panel gas treatment method based on partition step-by-step increasing tree-shaped directional long drilling |
| CN110735629A (en) * | 2019-09-26 | 2020-01-31 | 天地科技股份有限公司 | water guide crack belt height determination method based on upward drilling speed |
| CN112922665A (en) * | 2021-01-19 | 2021-06-08 | 库车县科兴煤炭实业有限责任公司 | Construction method for treating abnormal gas emission in low-gas mine goaf by high-level drainage |
| CN113027514A (en) * | 2021-05-13 | 2021-06-25 | 河南大有能源股份有限公司耿村煤矿 | Drainage method for pressure relief hole in coal wall of high gas rock burst working face |
| CN118391087A (en) * | 2024-07-01 | 2024-07-26 | 华北理工大学 | Combined treatment method for gas in coal seam and goaf |
Citations (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102162367A (en) * | 2011-03-23 | 2011-08-24 | 彬县水帘洞煤炭有限责任公司 | Arrangement method for gas drainage drill sites of highly-gassy fully-mechanized top-coal caving surface |
| CN103775127A (en) * | 2013-12-31 | 2014-05-07 | 中国矿业大学 | Method for comprehensively treating gas in low-air-permeability high-gas-content coal seam group |
| CN105927269A (en) * | 2016-06-28 | 2016-09-07 | 杨国和 | Gas control method of outburst coal seam |
| CN106437825A (en) * | 2016-12-05 | 2017-02-22 | 山西石泉煤业有限责任公司 | Gas extraction method adopting high-level drilling on full-mechanized caving mining face of high gas mine |
| CN207761705U (en) * | 2017-11-27 | 2018-08-24 | 陕西省煤层气开发利用有限公司 | Gas drainage system based on roof horizontal drilling |
| CN108506037A (en) * | 2018-03-19 | 2018-09-07 | 中煤科工集团西安研究院有限公司 | Coal working face top plate high position directional drilling group's pressure relief gas pumping mining method |
| CN109403915A (en) * | 2018-11-27 | 2019-03-01 | 陕西陕煤铜川矿业有限公司陈家山煤矿 | A kind of improved extraction drilling and sealing method |
-
2018
- 2018-11-29 CN CN201811439456.2A patent/CN109339856A/en active Pending
Patent Citations (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102162367A (en) * | 2011-03-23 | 2011-08-24 | 彬县水帘洞煤炭有限责任公司 | Arrangement method for gas drainage drill sites of highly-gassy fully-mechanized top-coal caving surface |
| CN103775127A (en) * | 2013-12-31 | 2014-05-07 | 中国矿业大学 | Method for comprehensively treating gas in low-air-permeability high-gas-content coal seam group |
| CN105927269A (en) * | 2016-06-28 | 2016-09-07 | 杨国和 | Gas control method of outburst coal seam |
| CN106437825A (en) * | 2016-12-05 | 2017-02-22 | 山西石泉煤业有限责任公司 | Gas extraction method adopting high-level drilling on full-mechanized caving mining face of high gas mine |
| CN207761705U (en) * | 2017-11-27 | 2018-08-24 | 陕西省煤层气开发利用有限公司 | Gas drainage system based on roof horizontal drilling |
| CN108506037A (en) * | 2018-03-19 | 2018-09-07 | 中煤科工集团西安研究院有限公司 | Coal working face top plate high position directional drilling group's pressure relief gas pumping mining method |
| CN109403915A (en) * | 2018-11-27 | 2019-03-01 | 陕西陕煤铜川矿业有限公司陈家山煤矿 | A kind of improved extraction drilling and sealing method |
Cited By (9)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN109973140A (en) * | 2019-04-11 | 2019-07-05 | 河南理工大学 | A kind of first mining height effect gas pumping method of high prominent mine large-mining-height working surface |
| CN110735629A (en) * | 2019-09-26 | 2020-01-31 | 天地科技股份有限公司 | water guide crack belt height determination method based on upward drilling speed |
| CN110735629B (en) * | 2019-09-26 | 2023-08-29 | 天地科技股份有限公司 | Water guide fracture zone height judging method based on upward drilling speed |
| CN110685734A (en) * | 2019-10-24 | 2020-01-14 | 中煤科工集团西安研究院有限公司 | Panel gas treatment method based on partition step-by-step increasing tree-shaped directional long drilling |
| CN110685734B (en) * | 2019-10-24 | 2021-01-29 | 中煤科工集团西安研究院有限公司 | Panel gas treatment method based on partition step-by-step increasing tree-shaped directional long drilling |
| CN112922665A (en) * | 2021-01-19 | 2021-06-08 | 库车县科兴煤炭实业有限责任公司 | Construction method for treating abnormal gas emission in low-gas mine goaf by high-level drainage |
| CN113027514A (en) * | 2021-05-13 | 2021-06-25 | 河南大有能源股份有限公司耿村煤矿 | Drainage method for pressure relief hole in coal wall of high gas rock burst working face |
| CN113027514B (en) * | 2021-05-13 | 2023-10-24 | 河南大有能源股份有限公司耿村煤矿 | High-gas rock burst working face coal wall pressure relief hole drainage method |
| CN118391087A (en) * | 2024-07-01 | 2024-07-26 | 华北理工大学 | Combined treatment method for gas in coal seam and goaf |
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Application publication date: 20190215 |