CN106761749A - Large-inclination-angle coal bed breaking roof big gun is adopted and turns fully mechanized mining - Google Patents
Large-inclination-angle coal bed breaking roof big gun is adopted and turns fully mechanized mining Download PDFInfo
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- CN106761749A CN106761749A CN201611204890.3A CN201611204890A CN106761749A CN 106761749 A CN106761749 A CN 106761749A CN 201611204890 A CN201611204890 A CN 201611204890A CN 106761749 A CN106761749 A CN 106761749A
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- coal
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- face
- big gun
- mechanized mining
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- E—FIXED CONSTRUCTIONS
- E21—EARTH DRILLING; MINING
- E21C—MINING OR QUARRYING
- E21C41/00—Methods of underground or surface mining; Layouts therefor
- E21C41/16—Methods of underground mining; Layouts therefor
- E21C41/18—Methods of underground mining; Layouts therefor for brown or hard coal
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- E—FIXED CONSTRUCTIONS
- E21—EARTH DRILLING; MINING
- E21D—SHAFTS; TUNNELS; GALLERIES; LARGE UNDERGROUND CHAMBERS
- E21D21/00—Anchoring-bolts for roof, floor in galleries or longwall working, or shaft-lining protection
Abstract
Adopted the invention discloses large-inclination-angle coal bed breaking roof big gun and turn fully mechanized mining, by the blasting process stage, big gun adopts favourable turn tool fully mechanized mining stage composition.The described blasting process stage is set by determining basic exploitation, blows out coal mining, and coal-face supporting and Mined-out Area control are constituted；Described big gun adopts the favourable turn tool fully mechanized mining stage and expands helper's skill including tunnel, and back carries out supporting handling process.Technological process of the invention is set, and can adopt multiple moons using big gun in the case where fully-mechanized mining equipment can not be carried out on time (such as fully-mechanized mining equipment cannot be installed immediately), can averagely produce 24 ten thousand tons of coals more, increases income nearly ten million yuan.It is fully mechanized mining open-off cut to use and adopt direct expansion of coal-face in big gun, it is not required to stay and sets barrier pillar, the rate of recovery of coal resources is greatly improved, open-off cut is dug more again and reduces more than 20 meters of loss of coal pillar, reclaim coal more than 1.0 ten thousand tons, directly wound imitates more than 3,500,000 yuan more.
Description
Technical field
The present invention relates to a kind of Coal Mining Technology field, especially under large-inclination-angle coal bed breaking roof SNNP
Big gun is adopted and turns fully mechanized mining.
Background technology
Fully mechanized mining technology is the developing direction of coal mining, and the development of fully mechanized mining technology means coal breakage, coalings, transports coal and top board
The development of the mechanization of supporting, the significant improve production efficiency of fully mechanized mining energy, hence it is evident that improve safe condition.But with the comprehensive pick of fully mechanized mining
Mechanization Level is stepped up, and fully mechanized mining coal-face difficult arrangement, coal-face moves towards short, removal of home number of times frequently disadvantage
End also increasingly highlights.
At present, under Circumstances of Coal Mining at home, because a system reason, fully mechanized mining branch such as being ordered, being allocated by equipment
Frame and corollary equipment can not on time reach production zone, according to this reality and production needs, in the big production of this mechanization
Historical background under, in order to meet active demand of the society to the energy, and itself is to productivity, the need of science and technology lifting
Will, while the continuity in order to ensure production, has carried out big gun and has adopted the technical study for turning fully mechanized mining technology, i.e., it is advanced in coal-face
After the traditional big gun of row adopts multiple moons, then adopt coal-face and be enlarged along big gun and switch to fully-mechanized mining equipment and install cut eye, and in tradition
During this multiple moon that big gun is adopted, the ton of coal more than ten thousand can be produced more.
Traditional big gun is adopted and turns fully mechanized mining technology mostly by staying coal column, the process of open-off cut is dug in entity coal, because opening
The construction for cutting eye is carried out under a metastable rock stratum occurrence condition, and the requirement for open-off cut supporting is relatively low, state
Inside and outside have many successful examples for reference, but can to there is following Railway Project：
(1) open-off cut is adopted after coal-face is all withdrawn from big gun and carried out, and substantial amounts of manpower and materials is wasted, while not having
The continuity of guaranteed production.
(2) in today of energy growing tension, another pick open-off cut is not only to reduce productivity effect, more wastes money
Source.
(3) with the carrying out of production, abandoned coal pillar will be left behind potential safety hazard, influence production.
But, open-off cut is opened up in existing tunnel and in the case where production is not interrupted, there is following technical problem：
(1) back large area is hanging, the danger for increased roof break, being caving, and it is tired to be that roadway support brings
It is difficult.
(2) adopted using big gun before open-off cut is made, big gun adopts shock vibration effect strongly, increases roof cracking degree, top board
Extremely difficult management, the danger for again increase roof break, being caving.
(3) top board in open-off cut space turns into the cantilever top board of large span, and jib-length is far longer than general edge
Easily there is fracture in empty tunnel, drift section middle part；The absciss layer phenomenon that the Asynchrony of upper and lower rock mass is caused；At rib by
The problem of the plastic failure of country rock is caused in the concentration of stress.
(4) application of fully mechanized mining technology needs open-off cut for across strike direction true dip tunnel, selects suitable blasting process
It is the premise of open-off cut engineering.
Therefore, how formerly to be adopted using traditional big gun, then seamless excessively exploitation to mechanization comprehensive is one than larger
Difficult point.
The content of the invention
In order to solve the above problems, adopted the invention provides a kind of large-inclination-angle coal bed breaking roof big gun and turn fully mechanized mining, by
Blasting process stage, big gun adopts favourable turn tool fully mechanized mining stage composition.
The described blasting process stage is set by determining basic exploitation, blows out coal mining, coal-face supporting and goaf
Treatment is constituted；It is determined that exploitation setting includes determination working seam coal-face inclination angle substantially, between determining section dense supporting
Away from section dense support post is away from the gradient of intensive supporting；Coal-face supporting and Mined-out Area control are included to coal-face
Supporting set and the roof control of coal work face goaf set.
Described big gun adopts the favourable turn tool fully mechanized mining stage includes setting open-off cut technique, described setting open-off cut technique by
Helper's skill is expanded in tunnel, and will expand slope laneway top board carries out supporting handling process composition；Tunnel expansion helper's skill is will at open-off cut
The tunnel broadening of blasting process stage driving, makes tunnel that the operating of comprehensive mining machinery is satisfied with after widening.
Large-inclination-angle coal bed breaking roof big gun as described above is adopted and turns fully mechanized mining, specifically, determining that basic exploitation is set also
Including determining that coal-face is mined using longwell section dense coal-mining method.
Large-inclination-angle coal bed breaking roof big gun as described above is adopted and turns fully mechanized mining, specifically, determining working seam coal-getter
Making face inclination angle is：5 degree of pseudo- inclination angle.
Large-inclination-angle coal bed breaking roof big gun as described above is adopted and turns fully mechanized mining, specifically, between determining section dense supporting
Away from being 2.5-3.5m, section dense support post away from being 0.3m, the gradient 5-10 degree of intensive supporting.
Large-inclination-angle coal bed breaking roof big gun as described above is adopted and turns fully mechanized mining, specifically, the supporting to coal-face
It is set to：(1) determine the basic post supporting of coal-face using hydraulic prop and the supporting supporting of metal roof bar；(2) determine
Coal-face close standing props is using hydraulic prop and the supporting supporting of wooden cap.
Large-inclination-angle coal bed breaking roof big gun as described above is adopted and turns fully mechanized mining, specifically, described hydraulic prop
In the supporting supporting of metal roof bar, metal roof bar is perpendicular to coal-face, and coal of the metal roof bar termination away from coal-face
Wall distance is no more than 0.3m, and metal roof bar is supported by some hydraulic props, and hydraulic prop is under metal roof bar
Side arranges in a line and the spacing between hydraulic prop and hydraulic prop is 0.7m.
Some beams of metals are provided with described coal-face, the spacing between beams of metal is 1m.
Hydraulic prop is perpendicular to coal-face top board and base plate, and the prop setting angle of hydraulic prop is 0-3 degree.
Hydraulic prop setting load is more than 90KN, is absorbed in coal-face base plate under the post leg of hydraulic prop and exceedes
During more than 100mm, the post leg of hydraulic prop is added into post footwear.
Large-inclination-angle coal bed breaking roof big gun as described above is adopted and turns fully mechanized mining, specifically, described coal-face is close
The length for integrating pillar is 2.7-3.0m.
Large-inclination-angle coal bed breaking roof big gun as described above is adopted and turns fully mechanized mining, specifically, described adopt to coal-face
The roof control of dead zone is that coal-face goaf top plate is using whole caving method management top boards.
Large-inclination-angle coal bed breaking roof big gun as described above is adopted and turns fully mechanized mining, specifically, helper's skill is expanded in described tunnel
For：At selection open-off cut, expansion side is then carried out at the open-off cut for having selected.Select on the tunnel of coal work surface side in tunnel
Side 7 carries out expansion side, carries out brush nation first with the jewel hole mode of blowing out, and brush from top to bottom to default drift section, each brushing
The not super 1.2m of length, then by brushing section back 3 carry out supporting treatment.
The back of the section of brushing carries out supporting handling process and is：Wire netting 6 is laid in top board, then hinged roof is set
Beam coordinates supporting with hydraulic prop, and the wherein spacing between hydraulic prop is 0.7m.
Then it is distributed on top board and anchor pole 5, cable bolting is set, anchor pole, anchor cable 4 are connected with wire netting 6, constitutes anchor net branch
Shield；
The supporting of grillage 1 is set between back and roadway floor 2.
After suspension roof support, cable bolting, bolting with wire mesh, crib protection is completed, hydraulic prop is removed.
Large-inclination-angle coal bed breaking roof big gun as described above is adopted and turns fully mechanized mining, specifically, described anchor pole is pushed up in tunnel
Being distributed as on plate：Spacing 0.76m, array pitch 1m, anchor pole use diameter 0.02m, the resin anchor of length 2.5m；Described anchor cable
Being distributed as on back：Anchor cable arranges three rows, and array pitch is 1.52m, and anchor cable spacing is 2 meters, anchor cable diameter 0.018m, length
Degree 8m；Described grillage uses the fresh lumps of wood, and lumps of wood specification is 0.2 × 0.2m.
Beneficial effect
Technological process of the invention is set, can in the case where fully-mechanized mining equipment can not be carried out on time (such as fully-mechanized mining equipment
Cannot install immediately), multiple moons are adopted using big gun, can averagely produce ten thousand tons of coals of 2-4 more, increase income nearly ten million yuan.
Reduce the former big gun of recovery to adopt more than the 10 days coal-face time (adjacent coal-face withdraws the time), save artificial
Take more than 50,000 yuan, while reducing the security risk for withdrawing coal-face.
Use that adopt coal-face directly to expand in big gun be fully mechanized mining open-off cut, be not required to stay and set barrier pillar, be greatly improved
The rate of recovery of coal data, digs open-off cut and reduces more than 20 meters of loss of coal pillar more again, reclaims coal more than 1.0 ten thousand tons more,
Directly wound imitates more than 3,500,000 yuan.
Four is the time for shortening the preparation of fully mechanized mining system, dig more again open-off cut shorten nearly 1 month time and it is artificial,
Master Cost puts into more than 20 ten thousand yuan.
Coal-face is adopted in former big gun directly to expand as fully mechanized mining open-off cut, reduction withdraws big gun adopts coal-face and dig again and open
Cut the time required to eye leads cave as 1 month, be the ore deposit fully mechanized mining production times for having striven for one month more, produce the ton of coal more than 20,000 more, be
Ore deposit increases more than 700 ten thousand yuan of operating income.
In sum：Adopted using big gun and turn fully mechanized mining technology, be that enterprise reduces labour cost and fee of material and increase operating income is near
18450000 yuan, safety benefit is more to estimate.
This technology successfully solves following problem：
(1) according to the use requirement of open-off cut, the early stage blasting process for being adapted to its construction has been used.The big gun of early stage is set to adopt work
Big gun adopts the influence such as vibrations of generation and is reduced to minimum during skill, and later stage fully mechanized mining is not influenceed.
(2) from ore deposit pressure, fractured zones, the angle analysis of Surrounding Rock Movement and use prestressed anchor, anchor cable, pillar joint branch
Shield technology and substep expand open-off cut brushing technology, the amount of crushing and rib deflection of open-off cut are controlled, so as to limit
Stress concentration effect in open-off cut, has ensured the stability in tunnel.
Brief description of the drawings
Fig. 1 adopts stage open-off cut structure chart for big gun.
Fig. 2 is structure chart after open-off cut brushing.
In figure shown in label：1- grillages；2- roadway floors；3- backs；4- anchor cables；5- anchor poles；6- wire nettings；7- lanes
Helped on road.
Specific embodiment
Embodiment one.
Coal mining mine conditions：This adopts face coal seam for thick coal seam with big inclination, and inclination angle is 34 °~48 °, 40 ° of average out to.For big
Inclination angle coal seam breaking roof band.
It is as follows that operational parameter is set：
To ensure safety in production and improving per unit area yield, determine that this coal-face tiltedly moves towards longwell section dense and adopts using puppet of bowing
Coal method, it is contemplated that mid-term open-off cut is constructed, selection coal-face puppet inclination angle is 5 °, basic that true dip state is presented；Segmentation
Intensive spacing (pseudo- oblique distance) 3.0m, away from 0.3m, intensive bed course is high 0.5 meter, thick 0.5m for intensive post, intensive climbable gradient (vertical angle) 5
~10 °.
The blasting process stage：
The average mining height of coal-face is 2.65m.Advance of working cycle：1.0m.Using explosion coal-falling.
Borehole arrangement and blasting method：1. borehole arrangement：Arranged using five presbyopia.2. blasting method：Using
Millisecond detonator series connection connects big gun, forward demolition.
Explosion specification see the table below：
Shipment coal：After coal-face is blown out, coal, from slipping to eye of coalingging, loads 1 ton of U-shaped mine car, by interior along rib
Geared winch is drawn to parking lot.
Coal-face supporting and Mined-out Area control：
(1) coal-face supporting
1st, support form.The basic post of coal-face is using hydraulic prop and the supporting supporting of metal roof bar, a beam one
Post；The intensive supporting of coal-face is using hydraulic prop and the supporting supporting of wooden cap, the post of a cap one, wooden cap specification：It is long × wide
× thickness=40 × 15 × 10cm.
2nd, supporting quality.
1. the hydraulic prop of coal-face must be complete intact with metal roof bar.
2. hydraulic prop breaks into straight line, and array pitch 1.0m, post are no more than ± 100mm away from 0.70m, deviation；And gold
Rib distance of the category back timber termination away from coal-face is 0.3m.New exposed coal-face top board must immediate support.
3. section dense supporting is mixed to rib second row pillar, and section dense supporting length is controlled in 3m.
4. hydraulic prop is tried one's best perpendicular to coal-face top and coal-face base plate, meets mountain energetically, prop setting angle
0 °~3 °, all hydraulic props of coal-face must be carried all.
5. prick post footwear are wanted when hydraulic prop bores bottom amount more than 100mm, setting load must not be less than 90kN, and not enough is necessary
Carry out fluid infusion again.
6. when coal seam changes, it is necessary to change the hydraulic prop for adapting to mining height in time, prevent hydraulic prop overlength
Or it is ultrashort use, the live post overhang of hydraulic prop is not less than 100mm.
7. the mine timber lost, the hydraulic prop of failure must not be used, once discovery will be changed immediately.
8. coal-face roof cracking, at inbreak, it is necessary to connect top with row's material etc. tight, forbid empty top.
9. must in time carry out advanced drop in beam after blowing out or play prop, back timber is hinged rate must reach more than 90%.
10. coal-face must use anti-down rope, anti-down rope to fasten in monomer by the row's hydraulic prop of rib two and back timber
Between the triple-use valve of hydraulic prop and the top cover of hydraulic prop.
3rd, Mined-out Area control：Coal work face goaf is using whole caving method management top boards.
Big gun adopts the favourable turn tool fully mechanized mining stage.
Working procedure：Expand side → hydraulic prop supporting → bolt-mesh-anchor support.
At selection open-off cut, expansion side is then carried out at the open-off cut for having selected.
Carry out expanding side construction method at open-off cut：
1st, expand side and method is blown out using drilling, use MZ-1.2 moulded coal electric drill perforatings, 1~5 section of millisecond delay electric detonator
With safety of coal mines emulsion coal blasting.
2nd, using positive powder charge, every powder charge uses good yellow mud and water stemming material no more than 2 sections, and sealing clay length is not less than
600mm。
3rd, side 7 carries out expansion side on the tunnel of the coal work surface side in selection tunnel.Brushing is sequentially：Brush from top to bottom to default
Section, after each brushing, brushing section bottom and rib in angle of 45 degrees, to slip coal.Brushing length must not be big each time
The work of brushing next time can be carried out in 1.2m, after only brushing section supporting is finished.
4th, for personal security during installing, a cave of hiding is arranged in rib at interval of 15 meters, cave of hiding is deep 3.0 meters, wide by 2.0
Rice, high 2.8 meters, supporting is using the supporting of hydraulic prop coordination hinge back timber patch side, and three faces must be carried on the back with row's bavin and connect tight, single
Body hydraulic prop spacing is 0.8 meter.
Supporting scheme：
1st, supporting is carried out using hydraulic prop coordination hinge back timber, and in top board upper berth wire netting, monomer hydraulic branch
The spacing 0.7m of post, array pitch are × 1.0m.
(1) supporting intensity is calculated by 8 times of mining heights：
1. supporting intensity：P=8mr=8 × 2.65 × 25=530 (kN/m2).In formula：P is supporting intensity (unit kN/
M2), m is that (unit m), r take 25kN/m3 to the average mining height of coal-face directly to push up unit weight.
2. open-off cut supporting load：Q=P*S=530* (95*8.4)=422940 (kN).In formula：P is (single supporting intensity
Position kN/m2), S is coal-face area (unit：Square metre).
3. coal work area load is by intensive supporting and rib shared, thus intensive supporting load：
Q1=Q/2=422940/2=211470 (kN).
4. close standing props radical is calculated：(in formula, R is pillar nominal operation to n=Q1/R=211470/294=719.286
Resistance, is 294KN/ roots).
5. the array pitch of coal-face close standing props be 1.0m, then basic pillar post away from：
D=1/ (720/95/2)=1/3.79=0.264m.
(2) calculated by height：
1. height estimation：H=M/ (K-1)=2.65/ (1.35-1)=7.57m.In formula：H emits for coal-face
(unit m), K are bulking factor to drop height degree, take 1.35.
2. supporting intensity：P=H × r=7.57 × 25=189.25 (kN/m2).In formula：P is supporting intensity (unit kN/
m2)；H is that (unit m), r take 25kN/m3 to coal-face height directly to push up unit weight.
3. open-off cut supporting load：Q=P*S=189.25* (95*8.4)=151021.5 (kN).
In formula：P is supporting intensity (unit kN/m2), and S is coal-face area (unit：Square metre).
4. coal work area load is by intensive supporting and rib shared, thus intensive supporting load：
Q1=Q/2=151021.5/2=75511 (kN).
5. close standing props radical is calculated：N=Q1/R=75511/294=257 (root), R is the resistance of pillar nominal operation in formula
Power, is 294KN/ roots.
6. the array pitch of coal-face close standing props be 1.0m, then basic pillar post away from：
D=1/ (257/95/2)=1/1.353=0.739m.
(3) calculated by periodic weighting step pitch.
Calculating, comprehensive correlation experience according to more than：Goaf side uses intensive supporting, grillage, and intensive is two row's monomer liquids
Pressure stanchions articulated roof beam, pillar array pitch is 1.0 meters, and spacing is 0.3 meter, and grillage interval cannot be greater than 5.0 meters, grillage specification
It is 1.2 × 1.2 × 3.5；Using anchor rete cord band combined supporting in open-off cut, supporting requirement is disclosure satisfy that.
3rd, supporting parameter
(1) every time after brushing, it is necessary to carry out supporting in time, the row of strict implement brush one props up a row, pillar must meet mountain it is strong,
It is safe and reliable, and pillar must keep horizontal, vertical in alignment with the basic post of coal-face.
(2) roof timbering in open-off cut uses φ=20mm, (every anchor pole adds KZ2350 types to L=2.5m resin anchors
Powder stick 3), anchor net, anchor cable carry out permanent support, anchor pole spacing is that 0.76, array pitch is 1.0m；Rib uses bolting with wire mesh, anchor
Bar uses φ=20mm, L=2.5m resin anchors.
(3) anchor cable uses L=8m, φ=17.80mm, arranges three rows, and array pitch is 1.52 meters, 2 meters of spacing.
(4) crib protection uses the fresh lumps of wood, and lumps of wood specification is 0.2 × 0.2 meter, and grillage sets up must meet mountain effectively, with
Top board gap must use timber wedge wedging, and grillage must be connected with bitch.
Rockbolt installation technique：Between anchor pole, array pitch must strictly by code regulation arrangement, and eye position deviation cannot be greater than 100mm.
Soil Anchor Design anchor force is 50kN, and its anchor force must not be less than the 90% of design load, and pretightning force cannot be less than 30kN.Bolthole is straight
Footpath is 28mm, and depth is 2400mm, and anchor pole protruded length cannot be less than 10mm, must not exceed 50mm, and three footpaths require to match.
Rockbolt installation should be vertical with scar, and 75 degree are should be greater than with tunnel scar angle.
Anchor cable mounting process：Anchorage cable anchoring power is not less than 200kN, and anchor cable protruded length cannot be less than 150mm, cannot be greater than
250mm。
Above-mentioned implementation method is used for illustrating the present invention, rather than limiting the invention, in spirit of the invention
In scope of the claims, any modifications and changes made to the present invention both fall within protection scope of the present invention.
Claims (10)
1. large-inclination-angle coal bed breaking roof big gun is adopted and turns fully mechanized mining, and by the blasting process stage, big gun adopts the favourable turn tool fully mechanized mining stage
Constitute,
The described blasting process stage is set by determining basic exploitation, blows out coal mining, coal-face supporting and Mined-out Area control
Constitute；It is determined that exploitation setting includes determination working seam coal-face inclination angle substantially, section dense supporting spacing is determined, point
The intensive support post of section is away from the gradient of intensive supporting；Coal-face supporting and Mined-out Area control include the branch to coal-face
Shield is set and the roof control setting to coal work face goaf；
Described big gun adopts the favourable turn tool fully mechanized mining stage including setting open-off cut technique, and described setting open-off cut technique is by tunnel
Expand helper's skill, will expand slope laneway top board carries out supporting handling process composition；It is to adopt big gun at open-off cut that helper's skill is expanded in tunnel
The tunnel broadening of operation stage driving, makes tunnel that the operating of comprehensive mining machinery is satisfied with after widening.
2. large-inclination-angle coal bed breaking roof big gun as claimed in claim 1 is adopted and turns fully mechanized mining, it is characterised in that it is determined that opening substantially
Adopting setting also includes determining that coal-face is mined using longwell section dense coal-mining method.
3. large-inclination-angle coal bed breaking roof big gun as claimed in claim 1 is adopted and turns fully mechanized mining, it is characterised in that determine mine coal
Layer coal-face inclination angle is：5 degree of pseudo- inclination angle.
4. large-inclination-angle coal bed breaking roof big gun as claimed in claim 1 is adopted and turns fully mechanized mining, it is characterised in that it is determined that segmentation is close
It is 2.5-3.5m to integrate supporting spacing, section dense support post away from being 0.3m, the gradient 5-10 degree of intensive supporting.
5. large-inclination-angle coal bed breaking roof big gun as claimed in claim 1 is adopted and turns fully mechanized mining, it is characterised in that to coal work
The supporting in face is set to：(1) determine the basic post supporting of coal-face using hydraulic prop and the supporting supporting of metal roof bar；
(2) determine coal-face close standing props using hydraulic prop and the supporting supporting of wooden cap.
6. large-inclination-angle coal bed breaking roof big gun as claimed in claim 5 is adopted and turns fully mechanized mining, it is characterised in that described monomer
In hydraulic prop and the supporting supporting of metal roof bar, metal roof bar is perpendicular to coal-face, and metal roof bar termination is away from coal-getter
Make the rib distance in face no more than 0.3m, metal roof bar is supported by some hydraulic props, and hydraulic prop is in gold
Category back timber lower section is arranged in a line and the spacing between hydraulic prop and hydraulic prop is 0.7m；
Some beams of metals are provided with described coal-face, the spacing between beams of metal is 1m；
Hydraulic prop is perpendicular to coal-face top board and base plate, and the prop setting angle of hydraulic prop is 0-3 degree；
Hydraulic prop setting load is more than 90KN, is absorbed in coal-face base plate under the post leg of hydraulic prop and exceedes
During more than 100mm, the post leg of hydraulic prop is added into post footwear.
7. large-inclination-angle coal bed breaking roof big gun as claimed in claim 5 is adopted and turns fully mechanized mining, it is characterised in that described coal mining
The length of working face close standing props is 2.7-3.0m.
8. large-inclination-angle coal bed breaking roof big gun as claimed in claim 1 is adopted and turns fully mechanized mining, it is characterised in that described pair of coal mining
The roof control of work face goaf is that coal-face goaf top plate is using whole caving methods management top boards.
9. large-inclination-angle coal bed breaking roof big gun as claimed in claim 1 is adopted and turns fully mechanized mining, it is characterised in that described tunnel
Expanding helper's skill is：At selection open-off cut, expansion side is then carried out at the open-off cut for having selected；
Side carries out expansion side on the tunnel of the coal work surface side in selection tunnel, and brush nation is carried out first with the jewel hole mode of blowing out, and
Brush from top to bottom to default drift section, then the not super 1.2m of length of each brushing is carried out the back 3 of the section of brushing
Supporting is processed；
The back of the section of brushing carries out supporting handling process and is：Top board lay wire netting, then set articulated roof beam with
Hydraulic prop coordinates supporting, and the wherein spacing between hydraulic prop is 0.7m；
Then it is distributed on top board and bolt and cable anchor supporting is set, the connection of anchor pole, anchor cable and wire netting constitutes bolting with wire mesh；
Crib protection is set between back and roadway floor；
After suspension roof support, cable bolting, bolting with wire mesh, crib protection is completed, hydraulic prop is removed.
10. large-inclination-angle coal bed breaking roof big gun as claimed in claim 9 is adopted and turns fully mechanized mining, it is characterised in that described anchor
Bar being distributed as on back：Spacing 0.76m, array pitch 1m, anchor pole use diameter 0.02m, the resin anchor of length 2.5m；
Described anchor cable being distributed as on back：Anchor cable arranges three rows, and array pitch is 1.52m, and anchor cable spacing is 2m, anchor cable diameter
0.018m, length 8m；Described grillage uses the fresh lumps of wood, and lumps of wood specification is 0.2 × 0.2m.
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN114412500A (en) * | 2021-12-13 | 2022-04-29 | 国家能源集团宁夏煤业有限责任公司枣泉煤矿 | Coal face top roof supporting device |
Citations (3)
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Application publication date: 20170531 |