CN108798731A - 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
- CN108798731A CN108798731A CN201810549744.7A CN201810549744A CN108798731A CN 108798731 A CN108798731 A CN 108798731A CN 201810549744 A CN201810549744 A CN 201810549744A CN 108798731 A CN108798731 A CN 108798731A
- Authority
- CN
- China
- Prior art keywords
- anchor cable
- shaped mouth
- work
- cable beam
- preceding anchor
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- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
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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
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 trepanning on anchor cable beam, according to the trepanning 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, entity coal side work steel column is removed successively, anchor cable and rear anchor cable beam after construction and installation, preceding anchor cable beam is set one in front and one in back to suspend work girder steel head in midair with rear anchor cable beam, complete T-shaped mouth supporting construction operation.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 technology
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 is needed in a gang of construction drill site of tunnel entity coal or refuge chamber, since drilling machine is set after tunneling a distance
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 dark lift is done to canopy at present
The method for protecting support of canopy and later canopy carries out supporting to T-shaped mouth, and work steel strut, top plate setting are both provided in each side wall of T-shaped mouth
Work girder steel, this method for protecting support construction is complicated, and cost is higher, in addition causes secretly to lift canopy and later canopy ties up T-shaped mouth opening sky
Between, transport walking is influenced, space availability ratio is reduced, influences mine safety production to a certain degree.
Invention content
That the object of the present invention is to provide a kind of supportings is reasonable, 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 presses following operating procedure and carries out successively：
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 trepanning, pitch-row 1m, selection prepare the preceding anchor cable of prestressing force corresponding with anchor cable beam hole count and rear anchor cable；
C. coordinated using Pneumatic anchor rod machine in the corresponding ceiling location of T-shaped mouth work girder steel head according to the trepanning 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, with anchor cable rope pushing tow and send resin anchoring agent to bottom hole；
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 trepanning 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 removed entity coal side work steel column successively, equally applied then according to the process of c-f
Anchor cable and rear anchor cable beam after work installation, make preceding anchor cable beam one in front and one in back suspend work girder steel head in midair with rear anchor cable beam, complete T-shaped mouth branch
Protect 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 models, Mao Gu Li≤200kN, and anchor cable rope is exposed
Length is 150-250mm.
The resin anchoring agent is MSCK2340（It is red）And MSZ2340（White）Resin anchoring agent combines.
The present invention has the advantage that compared with original method for protecting support：It 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 availability ratio, does not influence transport walking, is conducive to mine safety production.
Description of the drawings
Invention is further described in 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 vertical view of the drift section structural schematic diagram after supporting of the present invention.
In figure：1- work steel columns；The goafs 2-；3- beam grabs；4- work girder steels；Anchor cable beam before 5-；Anchor cable before 6-；Anchor is locked after 7-；
Anchor cable beam after 8-；9- top plates；10- entity coals；11- bottom plates.
Specific implementation mode
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 lanes 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, are mutually slided between work girder steel and work steel column for preventing, and ensure 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 trepanning on front and back anchor cable beam, pitch-row 1m facilitate anchor cable to wear
Enter, selection prepares 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 models.Start anchor cable and preceding anchor cable beam before constructing, according on preceding anchor cable beam trepanning distance and number in T-shaped mouth work steel
The corresponding ceiling location of beam head is coordinated Φ 28mm double-vane drill bits using MQT-130/2.8-c-type Pneumatic anchor rod machine, is beaten using wet type
Anchor cable hole before eye mode is constructed on top plate, hole depth 9.5m.After roof-bolter drills, hole is rinsed well using pressure water,
Drilling rod is withdrawn, by 3 MSCK2340（It is red）Resin anchoring agent and 3 MSZ2340（White）Resin anchoring agent is sequentially loaded into brill
In hole, with anchor cable rope pushing tow and send resin anchoring agent to bottom hole, hole low level is in stablizing in rock stratum, to ensure that anchoring is reliable；With
When anchor cable rope pushing tow resin anchoring agent, not overexert cannot pull repeatedly, influence anchoring matter to prevent breaking resin anchoring agent
Amount.Preceding anchor cable head is connected with roof-bolter with the special note anchor device of anchor cable, roof-bolter is opened and promotes while stirring, first half term is at a slow speed
Rotation, the second half stir at full speed, until anchor cable rope is sent into bottom hole, whole mixing time 20s -30s, the MSCK2340 in hole
（It is red）Resin anchoring agent and MSZ2340（White）Resin anchoring agent is stirred rupture uniformly mixing, and chemistry occurs therebetween
Reaction, it is gradually Nian Jie with anchor cable rope and country rock to be freezing together, recoverable roof-bolter after roof-bolter thrust 1min is kept, preceding anchor is made
Rope is fixed in the drilling of top plate.Installation exercise equally is implemented to all preceding anchor cables, after installation, carries out anchor cable beam work of going forward
Industry, preceding anchor cable beam can utilize chain or 8# iron wires that preceding anchor cable beam is fixed on work girder steel head temporarily, preceding anchor cable penetrated by root
Each trepanning of preceding anchor cable beam, the pallet and lockset of first-class preceding anchor cable, then carry out pressurization tensioning to preceding anchor cable one by one；Preceding anchor cable
Stop adding when reaching 30MPa using anchor cable pretightning force before the pressure gauge observation mating with straining device, pressure gauge reading when tensioning
Pressure, it is desirable that its Mao Gu Li≤200kN, anchor cable rope protruded length are 150-250mm, 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.It has constructed after preceding anchor cable and preceding anchor cable beam, has removed entity successively
Coal side work steel column makes front and back anchor cable beam one in front and one in back then according to anchor cable and rear anchor cable beam after aforementioned same process construction and installation
Work girder steel left end is held in suspention work girder steel head support, and integer support is carried out to work girder steel and top plate together with the work steel column of right end,
To complete T-shaped mouth supporting construction operation.
Claims (4)
1. a kind of coal road T-shaped mouth laneway support method carries out it is characterized in that pressing following operating procedure successively：
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 trepanning, pitch-row 1m, selection prepare the preceding anchor cable of prestressing force corresponding with anchor cable beam hole count and rear anchor cable；
C. coordinated using Pneumatic anchor rod machine in the corresponding ceiling location of T-shaped mouth work girder steel head according to the trepanning 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, with anchor cable rope pushing tow and send resin anchoring agent to bottom hole；
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 trepanning 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 removed entity coal side work steel column successively, equally applied then according to the process of c-f
Anchor cable and rear anchor cable beam after work installation, make preceding anchor cable beam one in front and one in back suspend work girder steel head in midair with rear anchor cable beam, complete 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 models, 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 MSCK2340（It is red）And MSZ2340（White）Resin anchoring agent combines.
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 true CN108798731A (en) | 2018-11-13 |
| CN108798731B 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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| Publication number | Publication date |
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| CN108798731B (en) | 2019-09-10 |
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Granted publication date: 20190910 Termination date: 20200531 |
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