CN106089236A - A kind of district cross-cut coal seam notch overall structure and driving method - Google Patents
A kind of district cross-cut coal seam notch overall structure and driving method Download PDFInfo
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- CN106089236A CN106089236A CN201610608970.9A CN201610608970A CN106089236A CN 106089236 A CN106089236 A CN 106089236A CN 201610608970 A CN201610608970 A CN 201610608970A CN 106089236 A CN106089236 A CN 106089236A
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- 239000003245 coal Substances 0.000 title claims abstract description 61
- 238000000034 method Methods 0.000 title claims abstract description 21
- 239000011435 rock Substances 0.000 claims abstract description 37
- 238000010276 construction Methods 0.000 claims abstract description 35
- 239000004575 stone Substances 0.000 claims description 9
- 239000000725 suspension Substances 0.000 claims description 7
- 239000002893 slag Substances 0.000 claims description 6
- 239000011347 resin Substances 0.000 claims description 5
- 229920005989 resin Polymers 0.000 claims description 5
- 239000007921 spray Substances 0.000 claims description 5
- 241000826860 Trapezium Species 0.000 claims description 4
- 239000000523 sample Substances 0.000 claims description 4
- 230000005641 tunneling Effects 0.000 claims description 4
- 239000003795 chemical substances by application Substances 0.000 claims description 3
- 239000002360 explosive Substances 0.000 claims description 2
- 239000000203 mixture Substances 0.000 description 6
- 238000005065 mining Methods 0.000 description 4
- 238000000280 densification Methods 0.000 description 2
- 210000003141 lower extremity Anatomy 0.000 description 2
- 239000002184 metal Substances 0.000 description 2
- 238000000465 moulding Methods 0.000 description 2
- GOLXNESZZPUPJE-UHFFFAOYSA-N spiromesifen Chemical compound CC1=CC(C)=CC(C)=C1C(C(O1)=O)=C(OC(=O)CC(C)(C)C)C11CCCC1 GOLXNESZZPUPJE-UHFFFAOYSA-N 0.000 description 2
- 239000002699 waste material Substances 0.000 description 2
- 229910000831 Steel Inorganic materials 0.000 description 1
- 238000004873 anchoring Methods 0.000 description 1
- 230000015572 biosynthetic process Effects 0.000 description 1
- 238000005516 engineering process Methods 0.000 description 1
- 238000005286 illumination Methods 0.000 description 1
- 238000012544 monitoring process Methods 0.000 description 1
- 238000010079 rubber tapping Methods 0.000 description 1
- 239000013049 sediment Substances 0.000 description 1
- 239000011378 shotcrete Substances 0.000 description 1
- 239000010959 steel Substances 0.000 description 1
- 238000005728 strengthening Methods 0.000 description 1
Classifications
-
- E—FIXED CONSTRUCTIONS
- E21—EARTH OR ROCK DRILLING; MINING
- E21D—SHAFTS; TUNNELS; GALLERIES; LARGE UNDERGROUND CHAMBERS
- E21D9/00—Tunnels or galleries, with or without linings; Methods or apparatus for making thereof; Layout of tunnels or galleries
- E21D9/14—Layout of tunnels or galleries; Constructional features of tunnels or galleries, not otherwise provided for, e.g. portals, day-light attenuation at tunnel openings
-
- E—FIXED CONSTRUCTIONS
- E21—EARTH OR ROCK DRILLING; MINING
- E21D—SHAFTS; TUNNELS; GALLERIES; LARGE UNDERGROUND CHAMBERS
- E21D11/00—Lining tunnels, galleries or other underground cavities, e.g. large underground chambers; Linings therefor; Making such linings in situ, e.g. by assembling
- E21D11/04—Lining with building materials
- E21D11/10—Lining with building materials with concrete cast in situ; Shuttering also lost shutterings, e.g. made of blocks, of metal plates or other equipment adapted therefor
-
- E—FIXED CONSTRUCTIONS
- E21—EARTH OR ROCK DRILLING; MINING
- E21D—SHAFTS; TUNNELS; GALLERIES; LARGE UNDERGROUND CHAMBERS
- E21D11/00—Lining tunnels, galleries or other underground cavities, e.g. large underground chambers; Linings therefor; Making such linings in situ, e.g. by assembling
- E21D11/04—Lining with building materials
- E21D11/10—Lining with building materials with concrete cast in situ; Shuttering also lost shutterings, e.g. made of blocks, of metal plates or other equipment adapted therefor
- E21D11/107—Reinforcing elements therefor; Holders for the reinforcing elements
-
- E—FIXED CONSTRUCTIONS
- E21—EARTH OR ROCK DRILLING; MINING
- E21D—SHAFTS; TUNNELS; GALLERIES; LARGE UNDERGROUND CHAMBERS
- E21D9/00—Tunnels or galleries, with or without linings; Methods or apparatus for making thereof; Layout of tunnels or galleries
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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)
- Architecture (AREA)
- Structural Engineering (AREA)
- Environmental & Geological Engineering (AREA)
- Civil Engineering (AREA)
- Devices Affording Protection Of Roads Or Walls For Sound Insulation (AREA)
Abstract
The invention discloses a kind of district cross-cut coal seam notch overall structure and driving method, both sides, district cross-cut minable coal seam tunnel arrange notch；District cross-cut top board between the notch of district cross-cut both sides caunches, and ceiling height is identical with notch height；Winch cave, is positioned at roof and stablizes in rock stratum；Equipment cave, is positioned at seat earth and stablizes in rock stratum, the invention also discloses the driving method of said structure.Notch, when colliery developing section construction district cross-cut, once is tunneled out, again need not slot coal road by the present invention.
Description
Technical field
The present invention relates to coal-mining technique field, be specifically related to a kind of district cross-cut coal seam notch overall structure and driving side
Method.
Background technology
Coal road otch class also exists one-shift operation, long in time limit and also need to the tunnel that former developing section supporting is good
Carry out after-treatment, there is the unfavorable factors such as safety management difficulty is big.
Summary of the invention
Therefore, it is an object of the invention to provide a kind of when colliery developing section construction district cross-cut, once notch is tunneled
Out, need not be again to coal road otch.
To this end, the invention provides a kind of district cross-cut coal seam notch overall structure, district cross-cut minable coal seam tunnel two
Side arranges notch；
Described notch is right-angled trapezium section, and described notch south side is right angle, described notch north side roof；Or
Described notch is rectangular cross section, and described notch south side is roof, and described notch north side is positioned in rock stratum；
Described notch base plate is positioned at more than crossdrift rail level 2.1～2.3m；
Wide 5m, notch height 2.1m, each long 5m in district cross-cut both sides, adopting between the notch of district cross-cut both sides under described notch
District's crossdrift top board caunches, and described ceiling height is identical with notch height；
Winch cave, is positioned at roof and stablizes in rock stratum, described winch cave width 3.1m, high 3.3m, deep 3.0m, pushes up away from coal seam
Plate 3.0m～5.0m；
Equipment cave, is positioned at seat earth and stablizes in rock stratum, and described winch cave width 4.6m, high 3.2m, deep 5.0m, away from the bottom of coal seam
Plate 2.0m～8.0m.
Alternatively, arranging step in described notch base plate north side or southern side, described step width 1.0m, mark time high 0.3m, steps on
Step width 0.3m.
Alternatively, when described notch is right-angled trapezium section, a width of 3.5m on notch.
The driving method of a kind of district cross-cut coal seam notch, comprises the following steps:
Rock part elder generation opening caunches, after tunnel height sets, rectangular driving, it is wide × high × be deeply 2.0m × 2.6m ×
5.0m；
When laneway opening caunches, tunneling boring suspension roof support；After the enough height in tunnel, two help to use suspension roof support, and top is adopted
With bolt-mesh-spurting supporting, and helping near roof and beat advance support, advance support at portion's drift angle, front spy is got on hard rock, super
Front supporting passes from metal mesh opening, to roof hard rock, makes advance support put in place；Also advance support is used during counter-brush；
After treating that notch a gang of rock part tunnel excavates, vertical coal groove pickaxe tunnels, and driving width is 2.5m；
Combining employing Bolt net and jet and front-probe support when crossing coal groove, pick one spray, whitewashing is immediately following meeting head on, and linked network is close to rock coal
Face.
Alternatively, further comprising the steps of: before construction notch, to open to district cross-cut tunnel part 1.0m at roof
Beginning, district cross-cut back installs three arch supports, described arch support spacing 800mm, arch support props up with arch
Use 1.8m long anchor pole fixation between frame during perforating, be integrally forming, then the arch support installed is carried out bolt-mesh-spurting supporting.
Alternatively, described anchor pole is diameter 18mm resin anchor, the long anchor pole of 1.8m, and every anchor pole uses 2 K2850 anchorings
Agent, anchor pole and anchor spacing 0.9m, array pitch 0.9m.
Alternatively, wire netting use densification network, mesh sheet length × a width of 2.0m × 1.0m, the length of mesh × a width of 50mm ×
50mm。
Alternatively, the notch of construction is arranged higher, must leave pad slag when notch caunches below construction, pedals slag construction.
Alternatively, front grapnel bar is made in the stone head that the broken vertical coal groove direction good from supporting, beats more than top
One row, rock-bolt length 1.8m, spacing 200mm, with the horizontal 5 °～15 ° of angles, every anchor pole fills 2 resin explosive rolls.
Alternatively, for more stable girdle, the stone head first constructed, severity control, at about 2.0m, then hangs down
Coal is broken in straight direction, coal seam, after forming the notch section of wide 5.0m, high 2.6m, promotes comprehensively according to lower wide 5.0m, high 2.6m section.
Technical solution of the present invention, has the advantage that
1. embodiments of the invention provide a kind of district cross-cut coal seam notch overall structure and driving method, notch is straight
Angle trapezoidal cross-section, described notch south side is right angle, described notch north side roof；Or, notch is rectangular cross section, described notch
South side is roof, and described notch north side is positioned in rock stratum；Notch base plate is positioned at more than crossdrift rail level 2.1～2.3m；Notch
Lower wide 5m, notch height 2.1m, each long 5m in district cross-cut both sides, the district cross-cut top board between the notch of district cross-cut both sides caunches,
Described ceiling height is identical with notch height；Winch cave, is positioned at roof and stablizes in rock stratum, described winch cave width 3.1m, high
3.3m, deep 3.0m, away from roof 3.0m～5.0m；Equipment cave, is positioned at seat earth and stablizes in rock stratum, described winch cave width
4.6m, high 3.2m, deep 5.0m, away from seat earth 2.0m～8.0m.Said structure and technique are the most applicable to girdle or high seam,
Can be widely applied to the driving of the notch before district cross-cut seam mining, the notch arrangement of formation is reasonable, it is possible to meet current and
Needs during whole coal mining, without after-treatment, eliminate due to secondary operation and good to former developing section supporting
The potential safety hazard that tunnel secondary operation is brought, cost-effective, improve work efficiency；The one that embodiments of the invention provide
The driving method of district cross-cut girdle notch, simple easily construction, by rational construction procedure, drivage efficiency is high, to geology
The strong adaptability of change, provides premise for efficiently mining.
Accompanying drawing explanation
In order to be illustrated more clearly that the specific embodiment of the invention or technical scheme of the prior art, below will be to specifically
In embodiment or description of the prior art, the required accompanying drawing used is briefly described, it should be apparent that, in describing below
Accompanying drawing is some embodiments of the present invention, for those of ordinary skill in the art, before not paying creative work
Put, it is also possible to obtain other accompanying drawing according to these accompanying drawings.
Fig. 1 is district cross-cut girdle notch mixture proportioning in construction of the present invention；
Fig. 2 is district cross-cut girdle notch mixture proportioning in construction 1 profile of the present invention；
Fig. 3 is district cross-cut girdle notch mixture proportioning in construction 2 profile of the present invention；
Fig. 4 is district cross-cut high seam notch mixture proportioning in construction of the present invention；
Fig. 5 is district cross-cut high seam notch mixture proportioning in construction 4 profile of the present invention；
Fig. 6 is district cross-cut high seam notch mixture proportioning in construction 5 profile of the present invention.
Detailed description of the invention
Below in conjunction with accompanying drawing, technical scheme is clearly and completely described, it is clear that described enforcement
Example is a part of embodiment of the present invention rather than whole embodiments.Based on the embodiment in the present invention, ordinary skill
The every other embodiment that personnel are obtained under not making creative work premise, broadly falls into the scope of protection of the invention.
In describing the invention, it should be noted that term " " center ", " on ", D score, "left", "right", " vertically ",
Orientation or the position relationship of the instruction such as " level ", " interior ", " outward " they are based on orientation shown in the drawings or position relationship, merely to
Be easy to describe the present invention and simplifying describe rather than instruction or the hint device of indication or element must have specific orientation,
With specific azimuth configuration and operation, therefore it is not considered as limiting the invention.Additionally, term " first ", " second ",
" the 3rd " is only used for describing purpose, and it is not intended that indicate or hint relative importance.
If additionally, the most non-structure of technical characteristic involved in invention described below difference embodiment
Become conflict just can be combined with each other.
Embodiment 1
Girdle notch arrangement, sees shown in Fig. 1-3, and both sides, district cross-cut minable coal seam tunnel arrange notch；Described groove
Mouth is right-angled trapezium section, and described notch south side is right angle, described notch north side roof；Described notch base plate is positioned at crossdrift
More than rail level 2.1～2.3m, the present embodiment selects optimum 2.1m；A width of 3.5m on described notch, lower wide 5m, notch height 2.6m,
The each long 5m in district cross-cut both sides, the district cross-cut top board between the notch of district cross-cut both sides caunches, described ceiling height and notch
The most identical；Winch cave, is positioned at roof and stablizes in rock stratum, and described winch cave width 3.1m, high 3.3m, deep 3.0m, away from coal seam
Top board 3.0m～5.0m, the present embodiment selects optimum 3.5m；Equipment cave, is positioned at seat earth and stablizes in rock stratum, described winch cave
Wide 4.6m, high 3.2m, deep 5.0m, away from seat earth 2.0m～4.0m, opposite, ditch.
Embodiment 2
High seam notch arrangement, sees shown in Fig. 4-6, and both sides, district cross-cut minable coal seam tunnel arrange notch；Described groove
Mouth is rectangular cross section, and described notch south side is roof, and described notch north side is positioned in rock stratum；Described notch base plate is positioned at stone
More than door track face 2.1～2.3m, optimal choice 2.3m；Wide 5m under described notch, notch height 2.2m, notch is long, i.e. district cross-cut
The each long 5m in both sides, the district cross-cut top board between the notch of district cross-cut both sides caunches, and described ceiling height is identical with notch height；
Winch cave, is positioned at roof and stablizes in rock stratum, described winch cave width 3.1m, high 3.3m, deep 3.0m, away from roof 3.0m～
5.0m, the present embodiment selects optimum 5m；Equipment cave, is positioned at seat earth and stablizes in rock stratum, described winch cave width 4.6m, high
3.2m, deep 5.0m, away from seat earth 6.0m～8.0m, side, ditch.
Further, notch base plate north side or southern side arrange step, and described step width 1.0m, mark time high 0.3m, width of marking time
0.3m。
Embodiment 3
The construction method of a kind of girdle notch of this enforcement comprises the following steps:
S1, rock part elder generation opening caunch, after the height of tunnel, and rectangular driving, specification width × height × deep=2.0 × 2.6 ×
5.0m；When laneway opening caunches, use tunneling boring suspension roof support；After the enough height in tunnel, two help to use suspension roof support, and top uses
Bolt-mesh-spurting supporting；And help at portion's drift angle, accomplish fluently advance support near roof, advance support passes from metal mesh opening, extremely
Roof hard rock, it is ensured that every class advance support puts in place；During counter-brush, also every class performs advance support；
S2, treat that notch a gang of rock part tunnel excavates after, vertical coal groove tunnel, driving width is 2.5m；First break rock
Breaking coal after stone, advance support is first accomplished fluently in per tour, and front spy is got on hard rock.Move little big gun during broken rock, cross coal groove and take pickaxe to tunnel；
S3, cross coal slot part and use Bolt net and jet and front-probe support be used in combination, pick one spray, whitewashing immediately following meeting head on, linked network
It is close to rock coal face.
Embodiment 4
The construction method of the high seam notch of this enforcement comprises the following steps:
Before S1, construction notch, first coal groove is carried out strengthening supporting.In roof 1.0m to the south (district cross-cut tunnel portion
Point) start, district cross-cut back is installed three frame arch supports, set spacing 800mm, between support and support, perforating makes
With 1.8m long anchor pole fixation, it is integrally forming, then the arch support installed is carried out bolt-mesh-spurting supporting；
S2, notch are constructed, and first opening caunches, and wouldn't break roof base angle coal, notch is carried out interim suspension roof support.Treat
After the molding of scraper-trough conveyer lane, rectangular driving, specification: wide × high × deep=5.0 × 2.2 × 5.0m；Shotcrete is used to prop up rock part
Protecting, side coal seam part in notch south uses bolt-mesh-spurting supporting；During counter-brush ibid；
S3, notch rock part use perforating blast working, notch south side base angle coal to use wind pickaxe driving, if coal groove is relatively
Hard wind pickaxe is the most treatable, puts little big gun and processes, timely bolt-mesh-spurting supporting；
A pick one spray supporting after S4, notch molding, whitewashing is immediately following meeting head on, and linked network is close to rock coal face.
Further, protect anchor pole and select diameter 18mm resin anchor, use the long anchor pole of 1.8m, every anchor pole to use 2
K2850 Anchor Agent, anchor spacing 0.9m, array pitch 0.9m.
Further, wire netting use densification network, mesh sheet specification length × wide=2.0m × 1.0m, mesh specification length × wide=
50×50mm。
Construction period it is to be noted that
1., when construction, the notch of construction is arranged higher, must leave pad slag, pedal slag and execute when notch caunches below construction
Work.
2. before perforating, it is necessary to conscientiously check whether top board has Shi Huomei alive, it is necessary to strict implement taps system.Work
Before, be responsible for tapping by squad leader, neck pricker work in work, after work, confirm can construct after no problem.
3. caunch mouth of widening the view, the operation of the most accurate single hammer, after ending whole eye mouth, can hammer operation into shape more.When removing hammer, neck pricker work is helped
Helping driller to remove hammer, two people cooperate.
4., during work surface rake waste, pulley fixation must be made good use of illumination, must not have people in rope race by slusher driver,
Prevent steel wire rope from taking out people.
5., after banger, top side Shi Huomei alive to be removed in time, in time tunnel is carried out supporting, when notch is through coal groove, beat
Good front-probe support, takes bolt-mesh-spurting supporting, immediately following meeting head on.
6. construction period, personnel cooperate, and keep a close eye on oneself and other people construction location and security situation.
7. high seam installs arch support and reinforces district cross-cut roof safety measure
(1), before construction, it is necessary to get out arch support and the instrument of support work indispensability, such as sledgehammer, axe, pickaxe, plate
Son etc..
(2) when, transporting arch support, it should be noted that road conditions and electrical equipment, cable etc..Forbid support pickaback beam,
Lower limb is walked in the tunnel of the non-power-off of stringing.
(3), during the two above transporting supports of people, it is necessary to contact, accomplished to put unanimously.Forbid to crash and fall to throw away support, with
Anti-upspringing is hurted sb.'s feelings or damages support.
(4), workmen enter work surface and must tap system by strict implement, overhaul a top from outside to inside
Plate, tears clean stone and the crag of living open.Removing stone of living to be carried out by two people, people's monitoring, a people removes, forbids to carry out tearing stubble open without guardian.
To tap at any time in construction, special messenger monitors roof rock situation, finds that potential safety hazard processes in time.
(5), before construction, it is necessary to look first at construction environment around, check that working range inner support is the most firm, loosely
Gu time, it is necessary to first processing, potential safety hazard has processed can construct.
(6), before support, scraper hoist is first used to be taken off by waste logical, it is ensured that personnel have sufficient space at support.
(7), when digging support needling, run into hard-caked sediment use pneumatic pick and process.
(8), the frame lower limb that erects special messenger must be had to hold up jail, prevent from toppling over.
(9), set up arch support time minimum three people, specify special messenger unified command.Wherein two people's upper beam one people tighten up a screw.On
To closely cooperate during beam, rise and put unanimously, must not do what he thinks is right.
(10) after, arch support sets up, it is necessary to use anchor pole to fix, the complete fastening of screw, nut.
(11), institute's frame support spoil to be used, the space between support gib is filled up, is tamped, fixed, really
Protect workmen at its lower work safety.
(12) after, arch support sets up, it is necessary to just accomplishing Liang Qizhu, effective dimensions has to comply with regulation.
(13), in construction, it is necessary to check support fine status at any time, the good support of frame is reinforced after good.
8. for more stable girdle, the stone head first constructed, severity control at about 2.0m, then vertical coal seam
Coal is broken in direction, after forming the notch section of wide 5.0m, high 2.6m, promotes comprehensively according to wide 5.0m (under wide), high 2.6m section, executes
In time coal petrography is taked effective support during work.
9., in work progress, as girdle notch has coal big gun, construction area pressure big, use pneumatic pick or pickaxe driving；Make
Connect wind band when tunneling with pneumatic pick and use Special clip, it is ensured that be connected firmly；First tunnel the first half of coal groove, limit pick limit supporting；
After the first half coal groove bolt-mesh-spurting supporting of tunnel, beat cable bolting in time, press 2.0m along direction, coal seam cable interval and arrange.
Set safety director during per tour construction, pay close attention to construction area country rock and coal big gun situation, find to press to remove people immediately.
Obviously, above-described embodiment is only for clearly demonstrating example, and not restriction to embodiment.Right
For those of ordinary skill in the field, can also make on the basis of the above description other multi-form change or
Variation.Here without also cannot all of embodiment be given exhaustive.And the obvious change thus extended out or
Change among still in the protection domain of the invention.
Claims (10)
1. a district cross-cut coal seam notch overall structure, it is characterised in that both sides, district cross-cut minable coal seam tunnel arrange groove
Mouthful；
Described notch is right-angled trapezium section, and described notch south side is right angle, described notch north side roof；Or
Described notch is rectangular cross section, and described notch south side is roof, and described notch north side is positioned in rock stratum；
Described notch base plate is positioned at more than crossdrift rail level 2.1～2.3m；
Wide 5m, notch height 2.2m～2.6m under described notch, each long 5m in district cross-cut both sides, between the notch of district cross-cut both sides
District cross-cut top board caunches, and described ceiling height is identical with notch height；
Winch cave, is positioned at roof and stablizes in rock stratum, and described winch cave width 3.1m, high 3.3m, deep 3.0m, away from roof
3.0m～5.0m；
Equipment cave, is positioned at seat earth and stablizes in rock stratum, and described winch cave width 4.6m, high 3.2m, deep 5.0m, away from seat earth
2.0m～8.0m.
District cross-cut coal seam the most according to claim 1 notch overall structure, it is characterised in that in described notch base plate north
Side or southern side arrange step, described step width 1.0m, and mark time high 0.3m, and mark time wide 0.3m.
District cross-cut coal seam the most according to claim 1 and 2 notch overall structure, it is characterised in that described notch is straight
During the trapezoidal cross-section of angle, a width of 3.5m on notch.
4. the driving method of a district cross-cut coal seam notch, it is characterised in that comprise the following steps:
Rock part elder generation opening caunches, after tunnel height sets, rectangular driving, it is wide × high × be deeply 2.0m × 2.6m ×
5.0m；
When laneway opening caunches, tunneling boring suspension roof support；After the enough height in tunnel, two help to use suspension roof support, and top uses anchor
Net sprays supporting, and close roof is helped and beaten advance support at portion's drift angle, passes, beat to roof hard from anchor mesh
Rock, makes advance support put in place；Also advance support is used during counter-brush；
After treating that notch a gang of rock part tunnel excavates, vertical coal groove pickaxe tunnels, and driving width is 2.5m；
Combining employing Bolt net and jet and front-probe support when crossing coal groove, pick one spray, whitewashing is immediately following meeting head on, and linked network is close to rock coal face.
The driving method of district cross-cut coal seam the most according to claim 4 notch, it is characterised in that also include following step
Rapid: before construction notch, to start to district cross-cut tunnel part 1.0m at roof, district cross-cut back is installed three
Arch support, described arch support spacing 800mm, use the long anchor pole of 1.8m to fix between arch support and arch support during perforating
Firmly, it is integrally forming, then the arch support installed is carried out bolt-mesh-spurting supporting.
6. according to the driving method of the district cross-cut coal seam notch described in claim 4 or 5, it is characterised in that described anchor pole is
Long 1.8m, the resin anchor of diameter 18mm, every anchor pole uses 2 Anchor Agents, described anchor pole and anchor spacing 0.9m, array pitch
0.9m。
7. according to the driving method of the district cross-cut coal seam notch described in any one of claim 4～6, it is characterised in that described
The mesh sheet length of anchor net × a width of 2.0m × 1.0m, mesh length × a width of 50mm × 50mm.
8. according to the driving method of the district cross-cut coal seam notch described in any one of claim 7, it is characterised in that the groove of construction
Mouth is arranged higher, must leave pad slag when notch caunches below construction, pedals slag construction.
The driving method of district cross-cut coal seam the most according to claim 8 notch, it is characterised in that from good the most broken of supporting
Front grapnel bar is made in the stone head vertical coal groove direction opened, and makes a call to a row more than top, rock-bolt length 1.8m, spacing 200mm, with
Horizontal plane becomes 5 °～15 ° of angles, every anchor pole to fill 2 resin explosive rolls.
The driving method of district cross-cut coal seam the most according to claim 5 notch, it is characterised in that for more stable
Girdle, the stone head first constructed, severity control is at about 2.0m, and then coal is broken in vertical direction, coal seam, forms wide 5.0m, height
After the notch section of 2.6m, promote comprehensively according to lower wide 5.0m, high 2.6m section.
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Citations (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
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| CN1869403A (en) * | 2006-03-24 | 2006-11-29 | 钟显亮 | Safety coal mining and gas production method with separated air way |
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