CN108798731B - A kind of coal road T-shaped mouth laneway support method - Google Patents
A kind of coal road T-shaped mouth laneway support method Download PDFInfo
- Publication number
- CN108798731B CN108798731B CN201810549744.7A CN201810549744A CN108798731B CN 108798731 B CN108798731 B CN 108798731B CN 201810549744 A CN201810549744 A CN 201810549744A CN 108798731 B CN108798731 B CN 108798731B
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- Prior art keywords
- anchor cable
- shaped mouth
- work
- cable beam
- girder steel
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Classifications
-
- E—FIXED CONSTRUCTIONS
- E21—EARTH DRILLING; MINING
- E21D—SHAFTS; TUNNELS; GALLERIES; LARGE UNDERGROUND CHAMBERS
- E21D20/00—Setting anchoring-bolts
- E21D20/02—Setting anchoring-bolts with provisions for grouting
- E21D20/025—Grouting with organic components, e.g. resin
-
- E—FIXED CONSTRUCTIONS
- E21—EARTH DRILLING; MINING
- E21D—SHAFTS; TUNNELS; GALLERIES; LARGE UNDERGROUND CHAMBERS
- E21D17/00—Caps for supporting mine roofs
- E21D17/10—Details of mine caps for engaging the tops of pit-props, with or without retaining-plates; Retaining-plates
-
- E—FIXED CONSTRUCTIONS
- E21—EARTH DRILLING; MINING
- E21D—SHAFTS; TUNNELS; GALLERIES; LARGE UNDERGROUND CHAMBERS
- E21D20/00—Setting anchoring-bolts
- E21D20/003—Machines for drilling anchor holes and setting anchor bolts
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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)
- Structural Engineering (AREA)
- Excavating Of Shafts Or Tunnels (AREA)
Abstract
The invention discloses a kind of coal road T-shaped mouth laneway support methods, trapezoidal shed shoring is carried out to the T-shaped mouth tunnel in gob side entry driving using work steel column and work girder steel, according to tunnel T-shaped mouth Opening length, preceding anchor cable beam and rear anchor cable beam are processed using mining i beam, and the aperture on anchor cable beam, according to the aperture distance on preceding anchor cable beam in the corresponding preceding anchor cable hole of ceiling location construction of T-shaped mouth work girder steel head, anchor cable is fixed in the drilling of top plate before being made using roof-bolter, anchor cable beam before anchor cable is tightly held before making, work girder steel is held by the support of preceding anchor cable beam, supporting is carried out to top plate, successively remove entity coal side work steel column, anchor cable and rear anchor cable beam after construction and installation, anchor cable Liang Yuhou anchor cable beam one in front and one in back suspends work girder steel head in midair before making, complete the supporting construction operation of T-shaped mouth.Have the characteristics that supporting is reasonable, effect is good, cost is relatively low, it is safe and reliable, be not take up open space.
Description
Technical field
The invention belongs to the T-shaped mouth Roadway Support Technology fields in underground coal mine coal road gob side entry driving.
Background technique
To improve coal recovery rate, digging laneway expense is saved, in the base of the development of tunneling development technology in recent years
On plinth, no coal column gob side entry driving mode, i.e. coal working face air entering and returning tunnel are all made of when designing coal working face at this stage,
It to be tunneled along the goaf of stope.During air entering and returning tunnelling, tool steel shed supporting side is generally used
Formula carries out supporting and needs after tunneling a distance in a gang of construction drill site of tunnel entity coal or refuge chamber, since drilling machine is set
Standby enlargement, the space required drill site and chamber are increasing, it is also desirable to which T-shaped mouth open space increases, the lane of T-shaped mouth
Road supporting intensity will also meet Safety of Coal Mine Production supporting requirement.Work steel is all made of in the supporting of T-shaped mouth at present, and dark lift is done to canopy
The method for protecting support of canopy and later canopy carries out supporting to T-shaped mouth, is provided with work steel strut, top plate setting in each side wall of T-shaped mouth
Work girder steel, this method for protecting support construction is complicated, higher cost, in addition causes secretly to lift canopy and later canopy ties up T-shaped mouth opening sky
Between, transport walking is influenced, space utilization rate is reduced, to a certain degree influence mine safety production.
Summary of the invention
The object of the present invention is to provide a kind of supportings rationally, cost is relatively low, coal road that is safe and reliable, being not take up open space
T-shaped mouth laneway support method.
To achieve the goals above, the present invention successively presses following operating procedure and carries out:
A. trapezoidal shed shoring, row's work steel are carried out to the T-shaped mouth tunnel in gob side entry driving using work steel column and work girder steel
Column is located at goaf side, and another row's work steel column is located at entity coal side；
B. according to tunnel T-shaped mouth Opening length, preceding anchor cable beam and rear anchor cable beam are processed using mining i beam, and in anchor
The upper aperture of Suo Liang, pitch-row 1m are selected and are prepared the preceding anchor cable of prestressing force corresponding with anchor cable beam hole count and rear anchor cable；
C. Pneumatic anchor rod machine is utilized in the corresponding ceiling location of T-shaped mouth work girder steel head according to the aperture distance on preceding anchor cable beam
Anchor cable hole before cooperation double-vane drill bit is constructed on top plate；
D. after roof-bolter drilling, hole is rinsed well using pressure water, drilling rod is withdrawn, resin anchoring agent is successively filled
Enter in drilling, is sent resin anchoring agent to bottom hole with anchor cable rope pushing tow；
E. it opens roof-bolter to promote while stirring, until anchor cable rope is sent into bottom hole, withdraws roof-bolter, anchor cable is fixed before making
In the drilling of top plate；
F. installation exercise equally is implemented to all preceding anchor cables, after installation, using chain or iron wire temporarily by preceding anchor
Suo Liang is fixed on work girder steel head, the aperture of anchor cable beam before preceding anchor cable is penetrated by root, one by one the pallet and lockset of first-class preceding anchor cable,
Then pressurization tensioning is carried out to preceding anchor cable, anchor cable beam before anchor cable is tightly held before making holds work girder steel pair by the support of preceding anchor cable beam
Top plate carries out supporting；
G. it has constructed after preceding anchor cable and preceding anchor cable beam, has successively removed entity coal side work steel column, it is same then according to the process of c-f
Anchor cable and rear anchor cable beam after sample construction and installation, anchor cable Liang Yuhou anchor cable beam one in front and one in back suspends work girder steel head in midair before making, and completes T-shaped
Mouth supporting construction operation.
The preceding anchor cable beam and rear anchor cable beam are all made of No. 12 mining i beams.
The preceding anchor cable and rear anchor cable are all made of Φ 17.8mm × 10m model, Mao Gu Li≤200kN, and anchor cable rope is exposed
Length is 150-250mm.
The resin anchoring agent is the combination of MSCK2340 and MSZ2340 resin anchoring agent.
That the present invention has the advantage that compared with original method for protecting support is reasonable with supporting, effect is good, cost is relatively low, safety
Reliably, the features such as being not take up open space, expands space utilization rate, does not influence transport walking, is conducive to mine safety production.
Detailed description of the invention
The present invention is described in further detail below in conjunction with the accompanying drawings.
Fig. 1 is the drift section structural schematic diagram after supporting of the present invention.
Fig. 2 is the top view of the drift section structural schematic diagram after supporting of the present invention.
In figure: 1- work steel column；The goaf 2-；3- beam grab；4- work girder steel；Anchor cable beam before 5-；Anchor cable before 6-；Anchor cable after 7-；
Anchor cable beam after 8-；9- top plate；10- entity coal；11- bottom plate.
Specific embodiment
As seen from Figure 1, Figure 2, entity coal is located on the left of T-shaped mouth tunnel, and goaf is located on the right side of T-shaped mouth tunnel, top
For T-shaped mouth back, lower part is T-shaped mouth roadway floor, after having dug T-shaped mouth tunnel, using work steel column and work girder steel to edge
T-shaped mouth tunnel in the lane Kong Jue carries out trapezoidal shed shoring, and row's work steel column is located at goaf side, and another row's work steel column is located at
Entity coal side；Work girder steel lower part both sides are provided with beam grab, mutually slide between work girder steel and work steel column for preventing, and guarantee supporting
Safety.According to tunnel T-shaped mouth Opening length, preceding anchor cable beam and rear anchor cable beam, preceding anchor cable beam are processed using No. 12 mining i beams
No. 12 mining i beam processing and fabricatings are all made of with rear anchor cable beam, and the aperture on the anchor cable beam of front and back, pitch-row 1m facilitate anchor cable to wear
Enter, select and prepare preceding anchor cable corresponding with front and back anchor cable beam hole count and rear anchor cable, preceding anchor cable and rear anchor cable are all made of Φ
17.8mm × 10m model.Start anchor cable and preceding anchor cable beam before constructing, according on preceding anchor cable beam aperture distance and number in T-shaped
The corresponding ceiling location of mouth work girder steel head, utilizes MQT-130/2.8-c-type Pneumatic anchor rod machine to cooperate Φ 28mm double-vane drill bit, uses
Wet drilling method is constructed preceding anchor cable hole on top plate, hole depth 9.5m.After roof-bolter drills, using pressure water by Kong Chongxi
Completely, drilling rod is withdrawn, by 3 MSCK2340(red) resin anchoring agent and 3 MSZ2340(whites) resin anchoring agent successively fills
Enter in drilling, is sent resin anchoring agent to bottom hole with anchor cable rope pushing tow, hole low level is in stablizing in rock stratum, to guarantee that anchoring can
It leans on；When with anchor cable rope pushing tow resin anchoring agent, not overexert cannot pull repeatedly, influence anchor to prevent breaking resin anchoring agent
Stereoplasm amount.Preceding anchor cable head is connected with roof-bolter with the dedicated note anchor device of anchor cable, roof-bolter is opened and promotes while stirring, first half term
It rotates at a slow speed, the second half stirs at full speed, until anchor cable rope is sent into bottom hole, whole mixing time 20s -30s, in hole
MSCK2340(is red) resin anchoring agent and MSZ2340(white) resin anchoring agent is stirred to rupture and uniformly mix, therebetween
It chemically reacts, it is gradually Nian Jie with anchor cable rope and country rock to be freezing together, keep recoverable anchor pole after roof-bolter thrust 1min
Machine, anchor cable is fixed in the drilling of top plate before making.Installation exercise equally is implemented to all preceding anchor cables, after installation, is carried out
Preceding anchor cable beam operation, preceding anchor cable beam temporarily can be fixed on work girder steel head using chain or 8# iron wire by preceding anchor cable beam, by preceding anchor
Each aperture of anchor cable beam before rope is penetrated by root, the pallet and lockset of first-class preceding anchor cable, then pressurize to preceding anchor cable one by one
Tensioning；Anchor cable pretightning force, pressure gauge reading reach before being observed when preceding anchorage cable stretching using pressure gauge matched with straining device
Stop pressurization when 30MPa, it is desirable that its Mao Gu Li≤200kN, anchor cable rope protruded length are 150-250mm, make preceding anchor cable tightly
Anchor cable beam before holding holds work girder steel by the support of preceding anchor cable beam and carries out supporting to top plate.It has constructed after preceding anchor cable and preceding anchor cable beam,
Entity coal side work steel column is successively removed, in the former work steel column Support Position of dismounting, then according to aforementioned same process construction and installation
Anchor cable and rear anchor cable beam afterwards make front and back anchor cable beam one in front and one in back suspend the support of work girder steel head in midair and hold work girder steel left end, with right end
Work steel column carries out integer support to work girder steel and top plate together, to complete T-shaped mouth supporting construction operation.
Claims (4)
1. a kind of coal road T-shaped mouth laneway support method, it is characterized in that successively being carried out by following operating procedure:
A. trapezoidal shed shoring, row's work steel column position are carried out to the T-shaped mouth tunnel in gob side entry driving using work steel column and work girder steel
In goaf side, another row's work steel column is located at entity coal side；
B. according to tunnel T-shaped mouth Opening length, preceding anchor cable beam and rear anchor cable beam are processed using mining i beam, and in anchor cable beam
Upper aperture, pitch-row 1m are selected and are prepared the preceding anchor cable of prestressing force corresponding with anchor cable beam hole count and rear anchor cable；
C. cooperated in the corresponding ceiling location of T-shaped mouth work girder steel head using Pneumatic anchor rod machine according to the aperture distance on preceding anchor cable beam
Double-vane drill bit is constructed preceding anchor cable hole on top plate；
D. after roof-bolter drilling, hole is rinsed well using pressure water, drilling rod is withdrawn, resin anchoring agent is sequentially loaded into brill
In hole, resin anchoring agent is sent to bottom hole with anchor cable rope pushing tow；
E. it opens roof-bolter to promote while stirring, until anchor cable rope is sent into bottom hole, withdraws roof-bolter, anchor cable is fixed on top before making
In the drilling of plate；
F. installation exercise equally is implemented to all preceding anchor cables, after installation, using chain or iron wire temporarily by preceding anchor cable beam
It is fixed on work girder steel head, preceding anchor cable is penetrated to the aperture of preceding anchor cable beam by root, one by one the pallet and lockset of first-class preceding anchor cable, then
Pressurization tensioning is carried out to preceding anchor cable, anchor cable beam before anchor cable is tightly held before making holds work girder steel to top plate by the support of preceding anchor cable beam
Carry out supporting；
G. it has constructed after preceding anchor cable and preceding anchor cable beam, has successively removed entity coal side work steel column, equally applied then according to the process of c-f
Anchor cable and rear anchor cable beam after work installation, anchor cable Liang Yuhou anchor cable beam one in front and one in back suspends work girder steel head in midair before making, and completes T-shaped mouth branch
Protect construction operation.
2. a kind of coal road T-shaped mouth laneway support method according to claim 1, it is characterized in that the preceding anchor cable beam and
Anchor cable beam is all made of No. 12 mining i beams afterwards.
3. a kind of coal road T-shaped mouth laneway support method according to claim 1, it is characterized in that the preceding anchor cable is with after
Anchor cable is all made of Φ 17.8mm × 10m model, Mao Gu Li≤200kN, and anchor cable rope protruded length is 150-250mm.
4. a kind of coal road T-shaped mouth laneway support method according to claim 1, it is characterized in that the resin anchoring agent
For the combination of MSCK2340 and MSZ2340 resin anchoring agent.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201810549744.7A CN108798731B (en) | 2018-05-31 | 2018-05-31 | A kind of coal road T-shaped mouth laneway support method |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201810549744.7A CN108798731B (en) | 2018-05-31 | 2018-05-31 | A kind of coal road T-shaped mouth laneway support method |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN108798731A CN108798731A (en) | 2018-11-13 |
| CN108798731B true CN108798731B (en) | 2019-09-10 |
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| Application Number | Title | Priority Date | Filing Date |
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| CN201810549744.7A Expired - Fee Related CN108798731B (en) | 2018-05-31 | 2018-05-31 | A kind of coal road T-shaped mouth laneway support method |
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Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102425438A (en) * | 2011-11-21 | 2012-04-25 | 大同煤矿集团有限责任公司 | Supporting method of laneway under multiple goafs in ultra-close coal seam group |
| CN203257436U (en) * | 2013-03-26 | 2013-10-30 | 中国矿业大学 | H-section steel anchor cable beam used for roadway support |
| CN104695991A (en) * | 2015-03-20 | 2015-06-10 | 北京昊华能源股份有限公司 | Coal mine multiple seam bolting-grouting process |
| CN107975383A (en) * | 2017-11-20 | 2018-05-01 | 中国电建集团华东勘测设计研究院有限公司 | Underground chamber tee T intersection excavation supporting construction method |
-
2018
- 2018-05-31 CN CN201810549744.7A patent/CN108798731B/en not_active Expired - Fee Related
Patent Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102425438A (en) * | 2011-11-21 | 2012-04-25 | 大同煤矿集团有限责任公司 | Supporting method of laneway under multiple goafs in ultra-close coal seam group |
| CN203257436U (en) * | 2013-03-26 | 2013-10-30 | 中国矿业大学 | H-section steel anchor cable beam used for roadway support |
| CN104695991A (en) * | 2015-03-20 | 2015-06-10 | 北京昊华能源股份有限公司 | Coal mine multiple seam bolting-grouting process |
| CN107975383A (en) * | 2017-11-20 | 2018-05-01 | 中国电建集团华东勘测设计研究院有限公司 | Underground chamber tee T intersection excavation supporting construction method |
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| CN108798731A (en) | 2018-11-13 |
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