CN106089238A - A kind of high seam driuing along goaf support system - Google Patents
A kind of high seam driuing along goaf support system Download PDFInfo
- Publication number
- CN106089238A CN106089238A CN201610696653.7A CN201610696653A CN106089238A CN 106089238 A CN106089238 A CN 106089238A CN 201610696653 A CN201610696653 A CN 201610696653A CN 106089238 A CN106089238 A CN 106089238A
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- Prior art keywords
- anchor cable
- top board
- anchor
- lower side
- support system
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- 229910000831 Steel Inorganic materials 0.000 claims abstract description 26
- 239000010959 steel Substances 0.000 claims abstract description 26
- 230000002787 reinforcement Effects 0.000 claims abstract description 13
- 230000008093 supporting effect Effects 0.000 claims description 23
- 230000003111 delayed effect Effects 0.000 claims description 13
- 239000007787 solid Substances 0.000 claims description 4
- 241000826860 Trapezium Species 0.000 claims description 2
- 238000004519 manufacturing process Methods 0.000 abstract description 2
- 239000003245 coal Substances 0.000 description 10
- 239000011435 rock Substances 0.000 description 10
- 239000002360 explosive Substances 0.000 description 6
- 239000011347 resin Substances 0.000 description 6
- 229920005989 resin Polymers 0.000 description 6
- 238000004873 anchoring Methods 0.000 description 4
- 238000010276 construction Methods 0.000 description 4
- 238000005516 engineering process Methods 0.000 description 4
- 239000002023 wood Substances 0.000 description 3
- 238000009412 basement excavation Methods 0.000 description 2
- 230000007812 deficiency Effects 0.000 description 2
- 230000000694 effects Effects 0.000 description 2
- 238000012423 maintenance Methods 0.000 description 2
- 238000005065 mining Methods 0.000 description 2
- 230000005856 abnormality Effects 0.000 description 1
- 238000007664 blowing Methods 0.000 description 1
- 230000000295 complement effect Effects 0.000 description 1
- 239000002131 composite material Substances 0.000 description 1
- 238000002788 crimping Methods 0.000 description 1
- 239000000686 essence Substances 0.000 description 1
- 238000000034 method Methods 0.000 description 1
- 238000000465 moulding Methods 0.000 description 1
- 230000002265 prevention Effects 0.000 description 1
- 230000003014 reinforcing effect Effects 0.000 description 1
- 239000000725 suspension Substances 0.000 description 1
- 230000005641 tunneling Effects 0.000 description 1
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 description 1
Classifications
-
- 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
- E21D11/006—Lining anchored in the rock
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- Engineering & Computer Science (AREA)
- Mining & Mineral Resources (AREA)
- Architecture (AREA)
- Civil Engineering (AREA)
- Structural Engineering (AREA)
- Life Sciences & Earth Sciences (AREA)
- General Life Sciences & Earth Sciences (AREA)
- Geochemistry & Mineralogy (AREA)
- Geology (AREA)
- Devices Affording Protection Of Roads Or Walls For Sound Insulation (AREA)
Abstract
The invention discloses a kind of high seam driuing along goaf support system, roof timbering mechanism includes roof steel bar net, multiple rows of roofbolt part of being disposed alternately on top board and multiple rows of top board anchor cable part, and roof steel bar net is arranged between multiple rows of roofbolt part and top board；Multiple lower sides anchor cable beam is arranged along same straight line, and each lower side anchor cable beam is vertically set under at least two rows in side shank member, and lower side bar-mat reinforcement is arranged between multiple rows of lower side shank member and lower side；Help anchor cable beam to include multiple upper sides anchor cable beam on per pass, multiple tracks is helped anchor cable beam different from the spacing of top board, per pass is helped anchor cable beam be respectively perpendicular and be clamped at least two rows upper side shank member.May insure that tunnel safety is constructed, and roadway deformation amount controls in allowed band, meets safe and efficient back production.
Description
Technical field
The present invention relates to a kind of Roadway Support Technology, in particular a kind of high seam driuing along goaf support system.
Background technology
For direction of strata northwest (NW), the colliery of the monoclinal structure of tendency east northeast, stratigraphic dip is shallow steep deep slow, rift structure
More growing, there is small-sized fold local.Mine uses vertical and inclined shaft combines, gathering main roadway, the expanding design of subregion crossdrift.
The general employing of high seam work surface air way driving stays narrow and small coal pillar pick lane support technology, but has a disadvantage in that gob side entry coal
Post enabling capabilities is low, safeguards the most difficult, repaiies phenomenon before being frequently present of after pick；Coal column deformation is serious, there is air leakage phenomena, to adopting
Dead zone fire prevention is ineffective.
The high seam of simple in construction, dim moulded coal, it directly pushes up as thickness 4.5～the Dark grey Sandy Silt of 12.5 meters.
Seam inclination is 22～30 °, mean obliquity 26 °, is unfavorable for laneway molding and stability of cavern roof.Two help the most contour, and suspension roof support is executed
Work difficulty.Additionally, upper side is highly big, poor stability, it is susceptible to side falling accident.Seam hardness is medium, and high side has metaboly.
Accordingly, it would be desirable to design support system, it is ensured that coal mining safety.
Summary of the invention
It is an object of the invention to overcome the deficiencies in the prior art, it is provided that a kind of high seam driuing along goaf support system,
Strengthen side portion's supporting and realize safe and reliable supporting.
The present invention is achieved by the following technical solutions, and the present invention includes the tunnel that cross section is right-angled trapezium, described
The top board in tunnel, upper side, lower side are respectively equipped with roof timbering mechanism, Shang Bang supporting mechanism and Xia Bang supporting mechanism；Described top board
Supporting mechanism includes roof steel bar net, be disposed alternately on top board multiple rows of roofbolt part and multiple rows of top board anchor cable part, described
Roof steel bar net is arranged between multiple rows of roofbolt part and top board；Described Xia Bang supporting mechanism includes lower side bar-mat reinforcement, setting
At multiple rows of lower side shank member and multiple lower sides anchor cable beam of lower side, the plurality of lower side anchor cable beam is arranged along same straight line, each
Lower side anchor cable beam be vertically clamped under at least two rows side shank member on, described lower side bar-mat reinforcement be arranged on multiple rows of lower side shank member with
Between lower side；Described Shang Bang supporting mechanism includes helping in side bar-mat reinforcement, the multiple rows of upper side shank member being arranged on side and multiple tracks
Anchor cable beam, per pass is helped anchor cable beam include multiple upper sides anchor cable beam, multiple tracks is helped anchor cable beam different from the spacing of top board, Mei Geshang
Side anchor cable beam is respectively perpendicular and is clamped at least two rows upper side shank member, and described upper side bar-mat reinforcement is arranged on multiple rows of upper side shank member
And between upper side.
Described often row roofbolt part includes that top board steel band and Duo Gen roofbolt, described many roofbolts sequentially pass through
Top board steel band is anchored in top board.
On described often row roofbolt part, a roofbolt near upper side and a roofbolt near lower side divide
Do not tilt 10～20 ° of settings to corresponding portion of side.
The anchor force of described every roofbolt is 90～120KN, and moment of torsion is 150～200N.m.
Described often row top board anchor cable part includes multiple top board pallet and Duo Gen top board anchor cable, and every top board anchor cable is by correspondence
Top board tray be anchored on top board, described top board anchor cable is longer than roll bolt.
The anchor cable pretightning force of described every top board anchor cable is 100～150KN, anchor force 180～220KN, and anchor cable is delayed meets
Head is less than or equal to 5m.
Described often row lower side shank member includes helping under lower side steel band and Duo Gen anchor pole, helps anchor pole to sequentially pass through under described many
Lower side steel band is anchored in lower side.
Described each lower side anchor cable beam includes helping under lower side strutbeam and Duo Gen anchor cable, helps anchor cable to be each passed through under described many
Lower side strutbeam is anchored in lower side, and described lower side anchor cable is solid anchor cable, and described lower side strutbeam and top board are provided with spacing, described under
Side anchor cable is longer than lower side anchor pole.
Described often row upper side anchor pole includes helping under side steel band and Duo Gen anchor pole, described many upper side anchor poles to sequentially pass through
Side steel band is anchored in lower side.
Anchor cable beam is helped to include that multiple upper sides anchor cable beam, each upper side anchor cable beam include side strutbeam and Duo Gen on described per pass
Upper side anchor cable, described many upper side anchor cables are each passed through side strutbeam and are anchored in side, and described upper side anchor cable is longer than side anchor
Bar.
The present invention has the advantage that the present invention not only payes attention to roof timbering compared to existing technology, attaches equal importance to portion of side and props up
Protect, it can be ensured that tunnel safety is constructed, and roadway deformation amount controls in allowed band, meets " big cross section, strong supporting, Zhi get
Live, to obtain save " requirement, for deep mining high seam driuing along goaf provide experience.Driving speed is fast, it is ensured that produces and takes over.Lane
Deflection little maintenance in road is little, and two lanes are easy to maintenance, meets safe and efficient back production.
Accompanying drawing explanation
Fig. 1 is the composite columnar section of the present invention；
Fig. 2 is the sectional view of the present invention；
The structural representation of Tu3Shi roof timbering mechanism；
The structural representation of Tu4Shi Shangbang supporting mechanism；
The structural representation of Tu5Shi Xiabang supporting mechanism.
Detailed description of the invention
Elaborating embodiments of the invention below, the present embodiment is carried out under premised on technical solution of the present invention
Implement, give detailed embodiment and concrete operating process, but protection scope of the present invention is not limited to following enforcement
Example.
As it is shown in figure 1, the tunnel feature of the present embodiment is tunnel immediate roof 1 is Dark grey siltstone, to anchor rod anchored
Effect and supporting reliability have certain impact.Particularly meeting water after-tack dilatancy, loosen, improving stability of surrounding rocks in roadway controls will
Bring certain difficulty.After using anchor cable net joint reinforcement supporting, country rock can be strengthened and consolidate effect.Therefore after roadway excavation, for
The intensity being reinforced coal rock layer can be improved in time, it is necessary to the most first improve the anchoring strength to top board 1 (because anchoring is strong
Spending the biggest, carrying structural thickness and bearing capacity that country rock is formed are the biggest).It addition, do not lose to effectively control anchoring body
Steady phenomenon, after roadway excavation, should install anchor pole delayed suitable distance construction anchor cable in time, to guarantee that anchor pole, anchor cable are propping up
Protect the time and load matches and reaches couple state.
In order to prevent top board 1 from absciss layer phenomenon in early days occurring, install the time of anchor pole, the distance of the delayed driving face of anchor cable
Must not exceed regulation, it is necessary to adhere in time, actively and tighten by design requirement the torque nut of anchor pole, make anchor pole produce bigger
Pretightning force, firmly accomplishes to help top to rule together (jointly reinforcing country rock), gives full play to country rock self mechanical property, it is ensured that tunnel safety makes
With.
The drift section of the present embodiment: design section is stalk inverted trapezoidal, clear span × (lower side) clear height=4.6 × 1.8m.
As shown in Figures 2 and 3, back supporting mechanism 10 includes multiple rows of roofbolt part roofbolt part and multiple rows of top
Plate anchor cable part, often row's roofbolt part roofbolt part uses 7 the IV level left hand thread high-strength roofbolts of steel pretension 11, M4
Type top board steel band 12 (specification: length 4600mm, 7 eyelets, eye distance 700mm), roof steel bar net crimping combined supporting.Roofbolt
Array pitch 700 × 900mm between 11；Roofbolt 11 specification is M24-2500mm.Every roofbolt 11 uses two joint Z2355
Type middling speed resin explosive roll the extensible bolting, roofbolt 11 design torque 180N.m, anchor force 100KN.Near upper and lower side one
Roofbolt 11 can respectively outside portion of side oblique 15 ° become with top board 1 that puppet is vertical to be installed.
Often row's top board anchor cable part, using top board anchor cable 13 specification is Ф 22-6300mm, and top board pallet 14 uses 300 × 300
× 15mm flat pallet, is arranged by array pitch 6-6-6 mode, and i.e. one row's roofbolt 11 arranges 6 top board anchor cables 13, top board anchor cable 13
Between array pitch 800 × 900mm.Every top board anchor cable 13 uses 3 Z2355 type middling speed resin explosive roll anchorings, and top board anchor cable 13 is pre-
Clamp force is 120KN, anchor force 200KN, the delayed no more than 5m that meets head on of top board anchor cable 13.
As it is shown in figure 5, top is top board 1 in figure, bottom is base plate, and Xia Bang supporting mechanism 20 includes multiple rows of lower side shank member
With multiple lower sides anchor cable beam, often row lower side shank member uses 3 IV level left hand thread steel pretension high-strength lower side anchor poles 21, M4 types
Lower side steel band 22 (specification: length 1800mm, 3 eyelets, eye distance 800mm), lower side bar-mat reinforcement (lining plastic net) combined supporting, lower side
Array pitch 800 × 900mm between anchor pole 21.Lower side anchor pole 21 specification is M24-2500mm.Anchor pole 21 is helped to use two joints under every
Z2355 type middling speed resin explosive roll the extensible bolting.Lower side anchor pole 21 design torque 180N.m, anchor force 80KN.Under upper and lower two shoulders
Side anchor pole 21 can outside the wall of lane oblique 15 °.When lower side 2 coal and rock is stablized, lower side anchor pole 21 can delayed be met head on 5m；Lower side 2 coal and rock
During soft broken, lower side anchor pole 21 must not be delayed.
Lower side 2 helps portion to arrange multiple lower sides anchor cable beam along straight line, and each lower side anchor cable beam includes lower side strutbeam 23 He
Helping anchor cable 24 under three, lower side strutbeam 23 uses M4 steel band of model (length: 2400mm, 3 eyelets, eye distance 900mm), lower side strutbeam 23
Away from top board 1500～800mm.Lower side anchor cable 24 specification: the solid anchor cable of Φ 22-3300mm, helps anchor cable 24 to use two joints under every
Z2355 type middling speed resin explosive roll the extensible bolting；Lower side anchor cable 24 pretightning force 80kN, anchor force 100kN.Lower side strutbeam 23 is delayed meets
Head must not exceed 10m.
As shown in Figure 4, in figure, top is top board 1, and bottom is base plate, and Shang Bang supporting mechanism 30 includes multiple rows of upper side shank member
With side anchor cable beam in multiple tracks, often row upper side shank member uses 5 IV level left hand thread steel pretension high-strength upper side anchor poles 31,2
Steel band 32 (specification: length 1800mm, 3, eye distance 800mm), upper side bar-mat reinforcement (lining plastic net) combined supporting is helped in M4 type, on
Array pitch 800 × 900mm between side anchor pole 31.Upper side anchor pole 31 specification is M24-2500mm.Every upper side anchor pole 31 uses two joints
Z2355 type middling speed resin explosive roll the extensible bolting, the upper side anchor poles 31 of upper and lower two shoulders can outside the wall of lane oblique 15 °.Upper side anchor pole 31 sets
Meter moment of torsion 180N.m, anchor force 80KN.When upper side 3 coal and rock is stablized, blowing out upper side 3 high portion supportings when tunneling should be immediately following meeting head on to execute
Work；The upper side anchor pole 31 of upper side 3 bottom can delayed be met head on no more than 5m；When upper side 3 coal and rock lithology is soft, upper side anchor pole 31 is not
Obtain delayed.
The portion of side of upper side 3 includes helping on three roads anchor cable beam, per pass has multiple upper sides anchor cable beam, each upper side anchor cable beam include
Upper side strutbeam 33 and three upper side anchor cables 34, upper side strutbeam 33 uses M4 steel band of model (length: 2400mm, 3 eyelets, eye distance
900mm), it is 800～1000mm that first is helped anchor cable beam and top board 1 distance, second is helped anchor cable beam and top board 1 apart from for
1800～2200mm, it is 3000～3200mm that the 3rd road is helped anchor cable beam and top board 1 distance.The specification of upper side anchor cable 34: Φ 22-
The solid anchor cable of 3300mm.Every upper side anchor cable 34 uses two joint Z2355 type middling speed resin explosive roll the extensible boltings；Upper side anchor cable 34 is pre-
Clamp force 80kN, anchor force 100kN.Help delayed the meeting head on of anchor cable beam to must not exceed 5m on first, second and third road is helped anchor cable beam stagnant
After meet head on to must not exceed 10m.
During facility moment of torsion deficiency, timely employing manually adds torsion, and all anchor poles add the moment of torsion turned round required by design.In lane
In piece Ф 200mm wood point post (cross-cut and floor lift control) of every 10 meters of complements.Blow out driving time, wood point post can delayed meet head on 15 meters
Set up；During fully-mechanized digging machine construction, wood point post can be reprinted after belt 15 meters and set up by delayed fully-mechanized digging machine.
Special zone special handling:
The Special zone such as top board 1 crushed zone, shear-zone, trickle band, immediate roof thickness variation abnormality band, first encrypt top
Anchor pole, simultaneously complement anchor cable, overlap canopy the most in time, and report in time and take other support pattern, it is ensured that safe construction.
The foregoing is only presently preferred embodiments of the present invention, not in order to limit the present invention, all essences in the present invention
Any amendment, equivalent and the improvement etc. made within god and principle, should be included within the scope of the present invention.
Claims (10)
1. a high seam driuing along goaf support system, is the tunnel of right-angled trapezium including cross section, it is characterised in that described lane
The top board in road, upper side, lower side are respectively equipped with roof timbering mechanism, Shang Bang supporting mechanism and Xia Bang supporting mechanism；Described top board props up
Protect mechanism include roof steel bar net, multiple rows of roofbolt part of being disposed alternately on top board and multiple rows of top board anchor cable part, described top
Plate bar-mat reinforcement is arranged between multiple rows of roofbolt part and top board；Described Xia Bang supporting mechanism includes lower side bar-mat reinforcement, is arranged on
The multiple rows of lower side shank member of lower side and multiple lower sides anchor cable beam, the plurality of lower side anchor cable beam is arranged along same straight line, each under
Side anchor cable beam be vertically clamped under at least two rows side shank member on, described lower side bar-mat reinforcement be arranged on multiple rows of lower side shank member with under
Between side；Described Shang Bang supporting mechanism includes helping in side bar-mat reinforcement, the multiple rows of upper side shank member being arranged on side and multiple tracks anchor
Suo Liang, per pass is helped anchor cable beam include multiple upper sides anchor cable beam, multiple tracks is helped anchor cable beam different from the spacing of top board, each upper side
Anchor cable beam is respectively perpendicular and is clamped at least two rows upper side shank member, described upper side bar-mat reinforcement be arranged on multiple rows of upper side shank member with
Between upper side.
A kind of high seam driuing along goaf support system the most according to claim 1, it is characterised in that described often row's top board anchor
Rod member includes that top board steel band and Duo Gen roofbolt, described many roofbolts sequentially pass through top board steel band and be anchored in top board.
A kind of high seam driuing along goaf support system the most according to claim 2, it is characterised in that described often row's top board anchor
On rod member a roofbolt near upper side and a roofbolt near lower side tilt to corresponding portion of side respectively 10～
20 ° of settings.
A kind of high seam driuing along goaf support system the most according to claim 2, it is characterised in that described every top board anchor
The anchor force of bar is 90～120KN, and moment of torsion is 150～200N.m.
A kind of high seam driuing along goaf support system the most according to claim 2, it is characterised in that described often row's top board anchor
Rope part includes that multiple top board pallet and Duo Gen top board anchor cable, every top board anchor cable are anchored at top board by corresponding top board tray
On, described top board anchor cable is longer than roll bolt.
A kind of high seam driuing along goaf support system the most according to claim 5, it is characterised in that described every top board anchor
The anchor cable pretightning force of rope is 100～150KN, anchor force 180～220KN, and anchor cable is delayed meets head on less than or equal to 5m.
A kind of high seam driuing along goaf support system the most according to claim 1, it is characterised in that help anchor under described often row
Rod member includes helping under lower side steel band and Duo Gen anchor pole, helps anchor pole to sequentially pass through lower side steel band and be anchored in lower side under described many.
A kind of high seam driuing along goaf support system the most according to claim 7, it is characterised in that described each lower side anchor
Suo Liang includes helping under lower side strutbeam and Duo Gen anchor cable, helps anchor cable to be each passed through lower side strutbeam and be anchored in lower side under described many,
Described lower side anchor cable is solid anchor cable, and described lower side strutbeam and top board are provided with spacing, and described lower side anchor cable is longer than lower side anchor pole.
A kind of high seam driuing along goaf support system the most according to claim 1, it is characterised in that help anchor on described often row
Bar includes helping under side steel band and Duo Gen anchor pole, described many upper side anchor poles to sequentially pass through side steel band and be anchored in lower side.
A kind of high seam driuing along goaf support system the most according to claim 9, it is characterised in that help on described per pass
Anchor cable beam includes that multiple upper sides anchor cable beam, each upper side anchor cable beam include helping on side strutbeam and Duo Gen anchor cable, on described many
Side anchor cable is each passed through side strutbeam and is anchored in side, and described upper side anchor cable is longer than side anchor pole.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201610696653.7A CN106089238A (en) | 2016-08-19 | 2016-08-19 | A kind of high seam driuing along goaf support system |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201610696653.7A CN106089238A (en) | 2016-08-19 | 2016-08-19 | A kind of high seam driuing along goaf support system |
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| CN106089238A true CN106089238A (en) | 2016-11-09 |
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| CN201610696653.7A Pending CN106089238A (en) | 2016-08-19 | 2016-08-19 | A kind of high seam driuing along goaf support system |
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Cited By (8)
| Publication number | Priority date | Publication date | Assignee | Title |
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| CN106837386A (en) * | 2017-02-17 | 2017-06-13 | 淮矿西部煤矿投资管理有限公司 | A kind of ultra thick coal bed fully mechanized amplification anti-risk topmast protection structure of span stope drift active workings |
| CN106869961A (en) * | 2017-03-31 | 2017-06-20 | 兖州煤业股份有限公司 | A kind of support system for being applied to the thin dirt band coal road in mining influence area |
| CN106894833A (en) * | 2017-01-23 | 2017-06-27 | 山东科技大学 | Gob side entry driving unbalanced support structure and construction method under the unstable overlying strata in deep |
| CN107654247A (en) * | 2017-09-22 | 2018-02-02 | 中国矿业大学 | A kind of sliding structure area pole loose thick coal layer coal roadway tunneling is met head on anti-top coal leakage method for leakage |
| CN109441511A (en) * | 2018-09-14 | 2019-03-08 | 莱芜市万祥矿业有限公司 | A kind of advanced support method of gob side entry retaining working face |
| CN109973113A (en) * | 2019-02-21 | 2019-07-05 | 天地科技股份有限公司 | A kind of asymmetric method for protecting support in bump tunnel |
| CN110905568A (en) * | 2019-12-10 | 2020-03-24 | 山东东山矿业有限责任公司株柏煤矿 | Support method for roadway of steeply inclined coal seam |
| CN112664248A (en) * | 2020-12-25 | 2021-04-16 | 国家能源集团宁夏煤业有限责任公司 | Soft rock water spraying roadway supporting method |
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Cited By (9)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN106894833A (en) * | 2017-01-23 | 2017-06-27 | 山东科技大学 | Gob side entry driving unbalanced support structure and construction method under the unstable overlying strata in deep |
| CN106837386A (en) * | 2017-02-17 | 2017-06-13 | 淮矿西部煤矿投资管理有限公司 | A kind of ultra thick coal bed fully mechanized amplification anti-risk topmast protection structure of span stope drift active workings |
| CN106837386B (en) * | 2017-02-17 | 2019-05-14 | 淮矿西部煤矿投资管理有限公司 | A kind of ultra thick coal bed fully mechanized anti-risk topmast protection structure of amplification span stope drift active workings |
| CN106869961A (en) * | 2017-03-31 | 2017-06-20 | 兖州煤业股份有限公司 | A kind of support system for being applied to the thin dirt band coal road in mining influence area |
| CN107654247A (en) * | 2017-09-22 | 2018-02-02 | 中国矿业大学 | A kind of sliding structure area pole loose thick coal layer coal roadway tunneling is met head on anti-top coal leakage method for leakage |
| CN109441511A (en) * | 2018-09-14 | 2019-03-08 | 莱芜市万祥矿业有限公司 | A kind of advanced support method of gob side entry retaining working face |
| CN109973113A (en) * | 2019-02-21 | 2019-07-05 | 天地科技股份有限公司 | A kind of asymmetric method for protecting support in bump tunnel |
| CN110905568A (en) * | 2019-12-10 | 2020-03-24 | 山东东山矿业有限责任公司株柏煤矿 | Support method for roadway of steeply inclined coal seam |
| CN112664248A (en) * | 2020-12-25 | 2021-04-16 | 国家能源集团宁夏煤业有限责任公司 | Soft rock water spraying roadway supporting method |
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Application publication date: 20161109 |