CN106761813A - Gob side entry driving unbalanced support method for designing under the unstable overlying strata in deep - Google Patents
Gob side entry driving unbalanced support method for designing under the unstable overlying strata in deep Download PDFInfo
- Publication number
- CN106761813A CN106761813A CN201710057753.XA CN201710057753A CN106761813A CN 106761813 A CN106761813 A CN 106761813A CN 201710057753 A CN201710057753 A CN 201710057753A CN 106761813 A CN106761813 A CN 106761813A
- Authority
- CN
- China
- Prior art keywords
- anchor
- bar
- anchor cable
- supporting
- entry driving
- Prior art date
- 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.)
- Granted
Links
- 238000000034 method Methods 0.000 title claims abstract description 22
- 238000010276 construction Methods 0.000 claims abstract description 54
- 239000011435 rock Substances 0.000 claims abstract description 39
- 238000012544 monitoring process Methods 0.000 claims abstract description 32
- 238000012360 testing method Methods 0.000 claims abstract description 7
- 238000004364 calculation method Methods 0.000 claims abstract description 6
- 238000004458 analytical method Methods 0.000 claims abstract description 5
- 238000004088 simulation Methods 0.000 claims abstract description 4
- 239000003245 coal Substances 0.000 claims description 86
- 229910000831 Steel Inorganic materials 0.000 claims description 82
- 239000010959 steel Substances 0.000 claims description 82
- 230000002787 reinforcement Effects 0.000 claims description 46
- QLMNCUHSDAGQGT-UHFFFAOYSA-N sintofen Chemical compound N1=C(C(O)=O)C(=O)C=2C(OCCOC)=CC=CC=2N1C1=CC=C(Cl)C=C1 QLMNCUHSDAGQGT-UHFFFAOYSA-N 0.000 claims description 35
- 230000003014 reinforcing effect Effects 0.000 claims description 14
- 238000009826 distribution Methods 0.000 claims description 13
- 238000006073 displacement reaction Methods 0.000 claims description 9
- 238000004873 anchoring Methods 0.000 claims description 6
- 230000006378 damage Effects 0.000 claims description 5
- 230000032798 delamination Effects 0.000 claims description 3
- 208000015181 infectious disease Diseases 0.000 claims description 2
- 239000011324 bead Substances 0.000 claims 1
- 210000003205 muscle Anatomy 0.000 claims 1
- 238000007569 slipcasting Methods 0.000 claims 1
- 230000006641 stabilisation Effects 0.000 claims 1
- 238000011105 stabilization Methods 0.000 claims 1
- 230000009286 beneficial effect Effects 0.000 abstract 1
- 230000015572 biosynthetic process Effects 0.000 abstract 1
- 230000000694 effects Effects 0.000 description 7
- 238000010586 diagram Methods 0.000 description 3
- 238000005516 engineering process Methods 0.000 description 3
- 244000000626 Daucus carota Species 0.000 description 2
- 235000005770 birds nest Nutrition 0.000 description 2
- 238000004519 manufacturing process Methods 0.000 description 2
- 238000005065 mining Methods 0.000 description 2
- 238000005728 strengthening Methods 0.000 description 2
- 235000005765 wild carrot Nutrition 0.000 description 2
- 208000019901 Anxiety disease Diseases 0.000 description 1
- 201000004569 Blindness Diseases 0.000 description 1
- 230000036506 anxiety Effects 0.000 description 1
- 230000006835 compression Effects 0.000 description 1
- 238000007906 compression Methods 0.000 description 1
- 238000013461 design Methods 0.000 description 1
- 239000004744 fabric Substances 0.000 description 1
- 239000000203 mixture Substances 0.000 description 1
- 238000007634 remodeling Methods 0.000 description 1
- 230000003245 working effect Effects 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
Landscapes
- 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)
- Lining And Supports For Tunnels (AREA)
- Devices Affording Protection Of Roads Or Walls For Sound Insulation (AREA)
Abstract
The present invention proposes gob side entry driving unbalanced support method for designing under a kind of unstable overlying strata in deep, comprises the following steps：Step one, analysis digging condition；Step 2, selection back supporting construction and roadway's sides unbalanced support structure；Step 3, theoretical calculation primary election supporting parameter；Step 4, numerical simulation；Step 5, the initial supporting parameter of selection；Step 6, the construction in test section tunnel；Step 7, arrangement monitoring station, draw monitoring curve；Step 8, the initial supporting parameter of amendment, formation meet the supporting parameter of gob side entry driving under the unstable overlying strata in deep.Beneficial effects of the present invention：Gob side entry driving under the unstable overlying strata in deep can safe efficiently be realized, deformation of the surrounding rock in tunnel amount is small.
Description
Technical field
The present invention relates to deep coalmining gob side entry driving Roadway Support Technology field, more particularly to a kind of deep is unstable
Determine gob side entry driving unbalanced support method for designing under overlying strata.
Background technology
The general basic termination of overlying rock activity after Adjacent Working Face exploitation of gob side entry driving, the stress that back production causes divides again
After cloth tends towards stability, stayed along mined out area edge and set thin coal pillar pick lane, tunnel side is that side is entity coal along sky side thin coal pillar,
Surrounding rock structure has non-symmetrical features, different from general stope drift active workings.As pit mining depth increases, gob side entry driving shield lane is narrow
Coal column is due to stress concentration, and deformation failure is serious, and obvious lack of balance phenomenon occurs in deformation of the surrounding rock in tunnel destruction；Because digging connects
Continuous anxiety, part mine faces Adjacent Working Face exploitation to be terminated rear overlying rock activity and not yet stablizes, and need in advance be stayed and be set narrow coal
The problem of post gob side entry driving；Not only surrounding rock structure has a non-symmetrical features to this kind of gob side entry driving, and due to gob side entry driving during, phase
Neighbour's work face goaf overlying rock activity not yet terminates, the stresses re-distribution that back production causes not yet is stablized, and gob side entry driving will also
The dynamic pressure influence of Adjacent Working Face overlying rock is born, roadway support difficulty is increased.Due to empty to the unstable overlying strata lower edge in deep
The mechanism understanding for digging lane supporting is not enough, and often blindness is larger in supporting practice, and most tunnels are still equal by force using original grade
Claim supporting, it is impossible to adapt to the non-symmetrical features of gob side entry driving surrounding rock structure, less adapt to Adjacent Working Face overlying rock dynamic pressure
Under the influence of gob side entry driving protect lane thin coal pillar loading characteristic, and thus cause deformation of the surrounding rock in tunnel destruction lack of balance show
As, thus can not well control the deformation and destruction of deep gob side entry driving.
The content of the invention
It is an object of the invention to provide gob side entry driving unbalanced support method for designing under a kind of unstable overlying strata in deep, solution
The control problem of certainly existing gob side entry driving deformation of the surrounding rock in tunnel.
The present invention provides gob side entry driving unbalanced support method for designing under a kind of unstable overlying strata in deep, including following step
Suddenly：
Digging condition at step one, analysis gob side entry driving position；
Step 2, selection back supporting construction and roadway's sides unbalanced support structure, make the supporting along sky side side
Density helps the support density of side more than entity coal, makes to help the supporting intensity of side more than entity coal along the supporting intensity of sky side side；
Step 3, carry out theoretical calculation and determine the various of back supporting construction and roadway's sides unbalanced support structure
Supporting parameter；
Step 4, some support parameter to back supporting construction and roadway's sides unbalanced support structure are carried out
Numerical simulation, based on lateral disrumpent feelings, adjusting stage lateral-supporting pressure the distribution characteristics of operated adjacent face goaf overlying rock,
Surrounding rock failure scope and prop force-bearing situation, analyze under different supporting parameters deformation of the surrounding rock in tunnel amount and along sky side thin coal pillar
Stability；
Step 5, selection rock deformation are smaller, help the preferable supporting parameter of thin coal pillar stability along sky, are pushed up as tunnel
The initial supporting parameter of slab supporting structure and roadway's sides unbalanced support structure；
Step 6, foundation back supporting construction and roadway's sides unbalanced support structure, and according to back branch
The initial supporting parameter of protection structure and roadway's sides unbalanced support structure, carries out test section tunnel at gob side entry driving position
Construction；
Step 7, test section roadway layout lane surface displacement monitoring station, roof delamination monitoring station, rockbolt stress monitoring
Stand, anchor cable load-bearing monitor station, entity coal side stress in coal bed monitoring station and thin coal pillar stress in coal bed monitoring station, each monitoring station record prison
Data are surveyed, surface displacement curve, absciss layer amount change curve, rockbolt stress monitoring curve, anchor cable stress are drawn according to Monitoring Data
Monitoring curve and stress in coal bed distribution curve；
Step 8, according to surface displacement curve, absciss layer amount change curve, rockbolt stress monitoring curve, anchor cable load-bearing monitor
Curve and the initial supporting parameter of stress in coal bed distribution curve amendment and being formed meets the branch of gob side entry driving under the unstable overlying strata in deep
Shield parameter.
Further, in step one, digging condition is including the geological conditions at gob side entry driving position, at gob side entry driving position
Supporting condition, at gob side entry driving position the non-symmetrical features condition of surrounding rock structure, Adjacent Working Face exploitation opened with gob side entry driving
Still unstabilized movement is to gob side entry driving roadway surrounding rock at time interval condition and gob side entry driving position between pick
Deformation failure influence degree condition.
Further, in step 2, back supporting construction include bar-mat reinforcement, W steel bands, high-strength prestressed anchor pole, by
The anchor cable girder steel assembly of anchor cable and girder steel composition, bar-mat reinforcement is close to back, and W steel bands are arranged in the outside of bar-mat reinforcement, many
The high-strength prestressed anchor pole of root passes perpendicularly through W steel bands, bar-mat reinforcement, and the anchored end of high-strength prestressed anchor pole is connected in back,
The two ends of girder steel offer anchor cable hole, and anchor cable passes through anchor cable hole, bar-mat reinforcement, and the anchored end of anchor cable is connected to back top phase
To relatively stablize rock stratum in and anchor cable anchored end to tunnel entity coal side lateral deviation to；Roadway's sides unbalanced support structure can
Realization has control to allow pressure, and roadway's sides unbalanced support structure is included along sky side supporting construction and entity coal side supporting construction；Along empty
Side supporting construction includes bar-mat reinforcement, W steel bands, high-strength prestressed pressure-relieving achor bar, the grouting cable anchor girder steel that is made up of anchor cable and girder steel
Assembly, bar-mat reinforcement is close to tunnel and is helped along sky, and W steel bands are arranged in the outside of bar-mat reinforcement, and many high-strength prestressed pressure-relieving achor bars hang down
Direct puncture crosses W steel bands, bar-mat reinforcement, and the anchored end of high-strength prestressed pressure-relieving achor bar is connected to tunnel along sky side, and the two ends of girder steel are opened
It is provided with anchor cable hole, grouting cable anchor passes through anchor cable hole, bar-mat reinforcement, the anchored end of grouting cable anchor is connected to tunnel along sky side；Entity
Coal side supporting construction is including bar-mat reinforcement, reinforcing bar beam and steel band pallet component, high-strength prestressed pressure-relieving achor bar, by anchor cable and girder steel group
Into anchor cable girder steel assembly, bar-mat reinforcement is close to tunnel entity coal side, and reinforcing bar beam is arranged in bar-mat reinforcement with steel band pallet component
Outside, many high-strength prestressed pressure-relieving achor bars pass perpendicularly through reinforcing bar beam and steel band pallet component, bar-mat reinforcement, the high-strength prestressed pressure that allows
The anchored end of anchor pole is connected in the entity coal side of tunnel, and the two ends of girder steel offer anchor cable hole, and anchor cable passes through anchor cable hole, reinforcing bar
Net, the anchored end of anchor cable is connected in the entity coal side of tunnel.
Further, in step 3, carry out theoretical calculation and determine back supporting construction and the non-title branch of roadway's sides
The supporting parameter of anchor pole, anchor cable in protection structure, the supporting parameter of anchor pole include the diameter of anchor pole, the length of anchor pole, anchor pole it is strong
Degree, the support density of anchor pole, the pretightning force of anchor pole, the supporting parameter of anchor cable include the diameter of anchor cable, the length of anchor cable, anchor cable
Intensity, the support density of anchor cable, the pretightning force of anchor cable, the position of the anchoring section of anchor cable.
Further, back supporting construction, also including side angle anchor pole, helps the anchored end of angle anchor pole to be arranged in tunnel top
In plate and roadway floor.
Further, in back supporting construction, many high-strength prestressed anchor pole shape high-strength prestressed anchor poles in a row,
An anchor cable is arranged every the high-strength prestressed anchor pole of a row.
Further, anchor cable alternately helps side near the middle part and tunnel in tunnel along sky, and anchor cable girder steel assembly prolongs along tunnel
The direction arrangement stretched.
Further, along sky side supporting construction, many high-strength prestressed pressure-relieving achor bar shapes are in a row high-strength prestressed to be allowed
Pressure anchor pole, every the high-strength prestressed pressure-relieving achor bar arrangement grouting cable anchor girder steel assembly of two rows；It is many in entity coal side supporting construction
The high-strength prestressed pressure-relieving achor bar shape of root high-strength prestressed pressure-relieving achor bar in a row, every the high-strength prestressed pressure-relieving achor bar arrangement of two rows
Anchor cable girder steel assembly.
Further, along sky side supporting construction, the length of grouting cable anchor is the 3/5 of coal pillar width.
Further, in entity coal side supporting construction, anchor end of anchorage cable will be located at Adjacent Working Face lateral-supporting pressure spike
Value is nearby or on the outside of peak value.
Compared with prior art, gob side entry driving unbalanced support method for designing and applied under the unstable overlying strata in deep of the invention
Work method has the characteristics that and advantage：
Gob side entry driving unbalanced support method for designing under the unstable overlying strata in deep of the invention, can realize safe efficiently
Gob side entry driving under the unstable overlying strata in deep, deformation of the surrounding rock in tunnel amount is small.
After specific embodiment of the invention is read in conjunction with the figure, the features and advantages of the invention will become clearer.
Brief description of the drawings
Technical scheme in order to illustrate more clearly the embodiments of the present invention, below will be to that will use needed for embodiment description
Accompanying drawing be briefly described, it should be apparent that, drawings in the following description are some embodiments of the present invention, for this area
For those of ordinary skill, on the premise of not paying creative work, other accompanying drawings can also be obtained according to these accompanying drawings.
Fig. 1 is the flow of gob side entry driving unbalanced support method for designing under the unstable overlying strata of embodiment of the present invention medium and deep
Figure；
Fig. 2 is tunnel roof support structure and roadway's sides unbalanced support structure section figure in the embodiment of the present invention；
Fig. 3 is tunnel roof support structure schematic diagram in the embodiment of the present invention；
Fig. 4 be the embodiment of the present invention in along sky side supporting construction schematic diagram；
Fig. 5 is entity coal side supporting construction schematic diagram in the embodiment of the present invention；
Wherein, 1, bar-mat reinforcement, 21, W steel bands, 22, reinforcing bar beam and steel band pallet component, 31, high-strength prestressed anchor pole, 32,
High-strength prestressed pressure-relieving achor bar, 33, side angle anchor pole, 4, girder steel, 51, anchor cable, 52, grouting cable anchor, 61, back, 62, more steady
Determine rock stratum, 63, tunnel helped along sky, 631, thin coal pillar, 64, tunnel entity coal side, 65, roadway floor, 66, goaf.
Specific embodiment
As shown in Figures 1 to 5, the present embodiment provides gob side entry driving unbalanced support design under a kind of unstable overlying strata in deep
Method, comprises the following steps：
Digging condition at step one, analysis gob side entry driving position, digging condition includes the geology at gob side entry driving position
Branch guard strip at condition (coal seam thickness, compression strength, roof and floor lithologic, geological structure and crustal stress etc.), gob side entry driving position
The non-symmetrical features bar of surrounding rock structure at part (shield lane thin coal pillar size, mining depth, heading sizes etc.), gob side entry driving position
At time interval condition and gob side entry driving position between part, Adjacent Working Face exploitation and gob side entry driving digging it is still unstabilized on
Rock stratum is moved to gob side entry driving deformation of the surrounding rock in tunnel destroying infection degree condition；
Step 2, for unbalanced along sky side thin coal pillar and entity coal side stress distribution, the characteristics of bearing strength difference is big,
Selection back supporting construction and roadway's sides unbalanced support structure, make to be helped more than entity coal along the support density of sky side side
The support density of side, makes to help the supporting intensity of side more than entity coal along the supporting intensity of sky side side；
Step 3, carry out theoretical calculation and determine the various of back supporting construction and roadway's sides unbalanced support structure
Supporting parameter, specifically determines the supporting parameter of various anchor poles, anchor cable, and the supporting parameter of anchor pole includes the diameter of anchor pole, anchor pole
Length, the intensity of anchor pole, the support density of anchor pole, the pretightning force of anchor pole, the supporting parameter of anchor cable include diameter, the anchor cable of anchor cable
Length, the intensity of anchor cable, the support density of anchor cable, the pretightning force of anchor cable, the position of the anchoring section of anchor cable.Such as, tunnel top
In slab supporting structure, anchor cable length should make anchorage cable anchoring in the relatively stable rock stratum in top board top, and its length is not less than
7.5m；The thin coal pillar region of high stress should be located near Adjacent Working Face along the anchor cable or grouting cable anchor anchored end in empty side supporting construction
Goaf side, length is chosen generally according to thin coal pillar width 1/2 to 3/5；In entity coal side supporting construction, anchor cable length is according to phase
Adjacent working face lateral-supporting pressure distribution curve is chosen, and it is attached that anchor end of anchorage cable will be located at Adjacent Working Face lateral-supporting pressure peak
Near or peak value outside.
Step 4, some support parameter to back supporting construction and roadway's sides unbalanced support structure are carried out
Numerical simulation, based on lateral disrumpent feelings, adjusting stage lateral-supporting pressure the distribution characteristics of operated adjacent face goaf overlying rock,
Surrounding rock failure scope and prop force-bearing situation, analyze under different supporting parameters deformation of the surrounding rock in tunnel amount and along sky side thin coal pillar
Stability；
Step 5, selection rock deformation are smaller, help the preferable supporting parameter of thin coal pillar stability along sky, are pushed up as tunnel
The initial supporting parameter of slab supporting structure and roadway's sides unbalanced support structure；
Step 6, foundation back supporting construction and roadway's sides unbalanced support structure, and according to back branch
The initial supporting parameter of protection structure and roadway's sides unbalanced support structure, carries out test section tunnel at gob side entry driving position
Construction；
Step 7, test section roadway layout lane surface displacement monitoring station, roof delamination monitoring station, rockbolt stress monitoring
Stand, anchor cable load-bearing monitor station, entity coal side stress in coal bed monitoring station and thin coal pillar stress in coal bed monitoring station, each monitoring station record prison
Data are surveyed, surface displacement curve, absciss layer amount change curve, rockbolt stress monitoring curve, anchor cable stress are drawn according to Monitoring Data
Monitoring curve and stress in coal bed distribution curve；
Step 8, according to surface displacement curve, absciss layer amount change curve, rockbolt stress monitoring curve, anchor cable load-bearing monitor
Curve and the initial supporting parameter of stress in coal bed distribution curve amendment and being formed meets the branch of gob side entry driving under the unstable overlying strata in deep
Shield parameter.Such as, coal body (entity coal side, thin coal pillar) distribution curve of stress be mainly used in analysis entities coal side damage envelope and
The stability of the empty side thin coal pillar in edge, and judge entity coal side accordingly, help the reasonable of the supporting parameters such as thin coal pillar anchor pole, anchor cable along sky
Property；Judge whether entity coal side anchor end of anchorage cable is located at Adjacent Working Face lateral-supporting pressure peak nearby or peak value outside, sentence
Whether disconnected thin coal pillar side anchor end of anchorage cable is close to operated adjacent face goaf side in the region of high stress.
Gob side entry driving unbalanced support method for designing under the unstable overlying strata in deep in the present embodiment, in step 2, lane
Road roof support structure includes bar-mat reinforcement 1, W steel bands 21, high-strength prestressed anchor pole 31, girder steel 4 and anchor cable 51.Many it is high-strength it is pre- should
Power anchor pole 31 and W steel bands 21 form combination supporting unit, to form shallow-layer supporting.Two anchor cables 51 constitute anchor cable steel with girder steel 4
Beam assembly supporting unit, to form deep support.Bar-mat reinforcement 1 is close to back 61, and W steel bands 21 are arranged in bar-mat reinforcement 1
Outside, many high-strength prestressed anchor poles 31 pass perpendicularly through W steel bands 21, bar-mat reinforcement 1, the anchored end connection of high-strength prestressed anchor pole 31
In back 61, the two ends of girder steel 4 offer anchor cable hole, and anchor cable 51 passes through anchor cable hole, bar-mat reinforcement 1, the anchoring of anchor cable 51
End is connected in the relatively stable rock stratum 62 in the top of back 61.Anchor cable 51 is nest anchor ropes, and end Bird's Nest number is no less than 3,
The diameter of anchor cable 51 is not less than 17.8mm, and anchor cable tensile strength is not less than 1860MPa.The anchored end of anchor cable 51 is to tunnel entity coal
Help 64 lateral deviations to, preferably can be relative to perpendicular to the direction of back 61, the anchored end of anchor cable 51 is to tunnel entity coal
Side is partial to 10 degree in side 64.In back supporting construction, many shapes of high-strength prestressed anchor pole 31 are in a row, high-strength every a row
Prestressed anchor 31 arranges an anchor cable 51, and anchor cable 51 helps 63 sides near the middle part and tunnel in tunnel along sky, and girder steel 4 is disposed with two
Row, girder steel 4 is alternately arranged along the direction that tunnel extends.Bar-mat reinforcement 1 plays overall package action to back 61, it is high-strength it is pre- should
Power anchor pole 31 and W steel bands 21 play shallow-layer supporting, and anchor cable 51 and girder steel 4 play deep support.In back supporting construction, also
Including side angle anchor pole 33, the anchored end of angle anchor pole 33 is helped to be arranged in the rock stratum of back 61 and in roadway floor 65, preferably
The rock stratum face of side angle anchor pole and back 61, the angle of roadway floor 65 be 10 degree.
Roadway's sides unbalanced support structure can realize that control allows pressure, and it includes being helped along sky side supporting construction and entity coal
Supporting construction, different supporting construction and supporting intensity are used along sky side supporting construction, entity coal side supporting construction.Along empty side branch
Protection structure includes bar-mat reinforcement 1, W steel bands 21, high-strength prestressed pressure-relieving achor bar 32, girder steel 4 and grouting cable anchor 52.Many it is high-strength it is pre- should
Power pressure-relieving achor bar 32 and W steel bands 21 form combination supporting unit, to form prestressing force bearing structure.Two grouting cable anchors 52 and steel
Beam 4 forms grouting cable anchor girder steel assembly supporting unit, for strengthening integer support effect.The length of grouting cable anchor 52 is tunnel
Along the 3/5 of the width of thin coal pillar 631 of empty side 63.Bar-mat reinforcement 1 is close to tunnel and is arranged in the outer of bar-mat reinforcement 1 along sky 63, W of side steel bands 21
Side, many high-strength prestressed pressure-relieving achor bars 32 pass perpendicularly through W steel bands 21, bar-mat reinforcement 1, the anchoring of high-strength prestressed pressure-relieving achor bar 32
End is connected to tunnel along sky side 63, and the two ends of girder steel 4 offer anchor cable hole, and grouting cable anchor 52 passes through anchor cable hole, bar-mat reinforcement 1,
The anchored end of grouting cable anchor 52 is connected to tunnel along sky side 63.Along empty side supporting construction, many high-strength prestressed pressure anchors that allow
The shape of bar 32 is in a row, and every the high-strength prestressed arrangement of pressure-relieving achor bar 32 girder steel 4 of two rows, girder steel 4 is vertically arranged to be helped in tunnel along sky
63 middle and upper part.Bar-mat reinforcement 1 plays overall package action, high-strength prestressed pressure-relieving achor bar 32 and W steel bands to tunnel along sky side 63
21 are used to form prestressing force bearing structure, and high-strength prestressed pressure-relieving achor bar 32 is more than in lane in tunnel along the arrangement density of sky side 63
The arrangement density of road entity coal side 64, grouting cable anchor 52 and girder steel 4 are used for Enhanced support group effect.Entity coal helps supporting construction
Including bar-mat reinforcement 1, reinforcing bar beam and steel band pallet component 22, high-strength prestressed pressure-relieving achor bar 32, girder steel 4 and anchor cable 51.Many high
Strength prestressed pressure-relieving achor bar 32 and reinforcing bar beam form combination supporting unit with steel band pallet component 22, and knot is carried to form prestressing force
Structure.Two anchor cables 51 form anchor cable girder steel assembly supporting unit with girder steel 4, for strengthening integer support effect.Bar-mat reinforcement 1 is tight
Patch tunnel entity coal side 64, reinforcing bar beam is arranged in the outside of bar-mat reinforcement 1, many high-strength prestressed pressures that allow with steel band pallet component 22
Anchor pole 32 passes perpendicularly through reinforcing bar beam and steel band pallet component 22, bar-mat reinforcement 1, and the anchored end of high-strength prestressed pressure-relieving achor bar 32 is connected
In tunnel entity coal side 64, the two ends of girder steel 4 offer anchor cable hole, and anchor cable 51 passes through anchor cable hole, bar-mat reinforcement 1, anchor cable 51
Anchored end is connected in tunnel entity coal side 64, and the anchored end of anchor cable 51 will be located near Adjacent Working Face lateral-supporting pressure peak
Or peak value outside.Anchor cable 51 is nest anchor ropes, and end Bird's Nest number is no less than 3, and the diameter of anchor cable 51 is not less than 17.8mm, anchor
Rope tensile strength is not less than 1860MPa.In entity coal side supporting construction, many shapes of high-strength prestressed pressure-relieving achor bar 32 are in a row,
Every the high-strength prestressed arrangement of pressure-relieving achor bar 32 girder steel 4 of two rows, girder steel 4 is vertically arranged in the middle and upper part of tunnel entity coal side 64.
Bar-mat reinforcement 1 plays overall package action, high-strength prestressed pressure-relieving achor bar 32 and reinforcing bar beam and steel band support to tunnel entity coal side 64
Disk component 22 is used to form prestressing force bearing structure, and anchor cable 51 and girder steel 4 are used for Enhanced support group effect.
Certainly, described above is not limitation of the present invention, and the present invention is also not limited to the example above, this technology neck
Change, remodeling, addition or replacement that the technical staff in domain is made in essential scope of the invention, should also belong to of the invention
Protection domain.
Claims (10)
1. gob side entry driving unbalanced support method for designing under a kind of unstable overlying strata in deep, it is characterised in that comprise the following steps：
Digging condition at step one, analysis gob side entry driving position；
Step 2, selection back supporting construction and roadway's sides unbalanced support structure, make the support density along sky side side
More than the support density that entity coal helps side, make to help the supporting intensity of side more than entity coal along the supporting intensity of sky side side；
Step 3, carry out some support that theoretical calculation determines back supporting construction and roadway's sides unbalanced support structure
Parameter；
Step 4, some support parameter to back supporting construction and roadway's sides unbalanced support structure carry out numerical value
Simulation, based on operated adjacent face goaf overlying rock lateral disrumpent feelings, adjusting stage lateral-supporting pressure distribution characteristics, country rock
Damage envelope and prop force-bearing situation, analyze deformation of the surrounding rock in tunnel amount and the stabilization along sky side thin coal pillar under different supporting parameters
Property；
Step 5, selection rock deformation are smaller, the preferable supporting parameter of thin coal pillar stability is helped along sky, as back branch
The initial supporting parameter of protection structure and roadway's sides unbalanced support structure；
Step 6, foundation back supporting construction and roadway's sides unbalanced support structure, and according to back supporting knot
The initial supporting parameter of structure and roadway's sides unbalanced support structure, carries out applying for test section tunnel at gob side entry driving position
Work；
Step 7, test section roadway layout lane surface displacement monitoring station, roof delamination monitoring station, rockbolt stress monitoring station, anchor
Rope load-bearing monitor station, entity coal side stress in coal bed monitoring station and thin coal pillar stress in coal bed monitoring station, each monitoring station record monitoring number
According to according to Monitoring Data drafting surface displacement curve, absciss layer amount change curve, rockbolt stress monitoring curve, anchor cable load-bearing monitor
Curve and stress in coal bed distribution curve；
Step 8, according to surface displacement curve, absciss layer amount change curve, rockbolt stress monitoring curve, anchor cable load-bearing monitor curve
The supporting for meeting gob side entry driving under the unstable overlying strata in deep with the initial supporting parameter of stress in coal bed distribution curve amendment and being formed is joined
Number.
2. gob side entry driving unbalanced support method for designing under the unstable overlying strata in deep according to claim 1, its feature exists
In：In step one, digging condition includes geological conditions, supporting condition, the edge at gob side entry driving position at gob side entry driving position
Between the time at the position of Kong Jue lanes between the non-symmetrical features condition of surrounding rock structure, Adjacent Working Face exploitation and gob side entry driving digging
Still unstabilized movement is to gob side entry driving deformation of the surrounding rock in tunnel destroying infection journey at parting bead part and gob side entry driving position
Degree condition.
3. gob side entry driving unbalanced support method for designing under the unstable overlying strata in deep according to claim 1, its feature exists
In：In step 2, back supporting construction includes bar-mat reinforcement, W steel bands, high-strength prestressed anchor pole, is made up of anchor cable and girder steel
Anchor cable girder steel assembly, bar-mat reinforcement is close to back, and W steel bands are arranged in the outside of bar-mat reinforcement, many high-strength prestressed anchors
Bar passes perpendicularly through W steel bands, bar-mat reinforcement, and the anchored end of high-strength prestressed anchor pole is connected in back, and the two ends of girder steel open up
There is anchor cable hole, anchor cable passes through the anchored end of anchor cable hole, bar-mat reinforcement, anchor cable to be connected in the relatively stable rock stratum in back top
And the anchored end of anchor cable to tunnel entity coal side lateral deviation to；Roadway's sides unbalanced support structure can realize that control allows pressure,
Roadway's sides unbalanced support structure is included along sky side supporting construction and entity coal side supporting construction；Include along empty side supporting construction
Bar-mat reinforcement, W steel bands, high-strength prestressed pressure-relieving achor bar, the grouting cable anchor girder steel assembly that is made up of anchor cable and girder steel, bar-mat reinforcement are tight
Patch tunnel is helped along sky, and W steel bands are arranged in the outside of bar-mat reinforcement, and many high-strength prestressed pressure-relieving achor bars pass perpendicularly through W steel bands, reinforcing bar
Net, the anchored end of high-strength prestressed pressure-relieving achor bar is connected to tunnel along sky side, and the two ends of girder steel offer anchor cable hole, slip casting anchor
Rope passes through anchor cable hole, bar-mat reinforcement, and the anchored end of grouting cable anchor is connected to tunnel along sky side；Entity coal side supporting construction includes steel
Muscle net, reinforcing bar beam are combined with steel band pallet component, high-strength prestressed pressure-relieving achor bar, the anchor cable girder steel being made up of anchor cable and girder steel
Body, bar-mat reinforcement is close to tunnel entity coal side, and reinforcing bar beam is arranged in the outside of bar-mat reinforcement with steel band pallet component, many it is high-strength it is pre- should
Power pressure-relieving achor bar passes perpendicularly through reinforcing bar beam and steel band pallet component, bar-mat reinforcement, and the anchored end of high-strength prestressed pressure-relieving achor bar is connected
In tunnel entity coal side, the two ends of girder steel offer anchor cable hole, and anchor cable passes through the anchored end of anchor cable hole, bar-mat reinforcement, anchor cable to connect
It is connected in the entity coal side of tunnel.
4. gob side entry driving unbalanced support method for designing under the unstable overlying strata in deep according to claim 3, its feature exists
In：In step 3, carry out theoretical calculation and determine anchor pole, anchor in back supporting construction and roadway's sides unbalanced support structure
The supporting parameter of rope, the supporting parameter of anchor pole include the diameter of anchor pole, the length of anchor pole, the intensity of anchor pole, anchor pole supporting it is close
Degree, the pretightning force of anchor pole, the supporting parameter of anchor cable include diameter, the length of anchor cable, the intensity of anchor cable, the supporting of anchor cable of anchor cable
Density, the pretightning force of anchor cable, the position of the anchoring section of anchor cable.
5. gob side entry driving unbalanced support method for designing under the unstable overlying strata in deep according to claim 3, its feature exists
In：Back supporting construction, also including side angle anchor pole, helps the anchored end of angle anchor pole to be arranged in back and roadway floor
In.
6. gob side entry driving unbalanced support method for designing under the unstable overlying strata in deep according to claim 3, its feature exists
In：In back supporting construction, many high-strength prestressed anchor pole shape high-strength prestressed anchor poles in a row are high-strength pre- every a row
Stress anchor pole arranges an anchor cable.
7. gob side entry driving unbalanced support method for designing under the unstable overlying strata in deep according to claim 6, its feature exists
In：Along sky side side, anchor cable girder steel assembly is arranged along the direction that tunnel extends at anchor cable middle part and tunnel alternately near tunnel.
8. gob side entry driving unbalanced support method for designing under the unstable overlying strata in deep according to claim 3, its feature exists
In：Along empty side supporting construction, many high-strength prestressed pressure-relieving achor bar shape high-strength prestressed pressure-relieving achor bars in a row, every two rows
High-strength prestressed pressure-relieving achor bar arranges grouting cable anchor girder steel assembly；In entity coal side supporting construction, many high-strength prestressed to allow
Pressure anchor pole shape high-strength prestressed pressure-relieving achor bar in a row, every the high-strength prestressed pressure-relieving achor bar arrangement anchor cable girder steel combination of two rows
Body.
9. gob side entry driving unbalanced support method for designing under the unstable overlying strata in deep according to claim 3, its feature exists
In：Along empty side supporting construction, the length of grouting cable anchor is the 3/5 of coal pillar width.
10. gob side entry driving unbalanced support method for designing under the unstable overlying strata in deep according to claim 3, its feature exists
In：In entity coal side supporting construction, anchor end of anchorage cable will be located at Adjacent Working Face lateral-supporting pressure peak nearby or outside peak value
Side.
Priority Applications (2)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201710057753.XA CN106761813B (en) | 2017-01-23 | 2017-01-23 | Gob side entry driving unbalanced support design method under the unstable overlying strata in deep |
| PCT/CN2017/108718 WO2018133493A1 (en) | 2017-01-23 | 2017-10-31 | Unbalanced support design method for gob-side entry driving under deep unstable cover rock |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201710057753.XA CN106761813B (en) | 2017-01-23 | 2017-01-23 | Gob side entry driving unbalanced support design method under the unstable overlying strata in deep |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN106761813A true CN106761813A (en) | 2017-05-31 |
| CN106761813B CN106761813B (en) | 2018-04-06 |
Family
ID=58942885
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201710057753.XA Active CN106761813B (en) | 2017-01-23 | 2017-01-23 | Gob side entry driving unbalanced support design method under the unstable overlying strata in deep |
Country Status (2)
| Country | Link |
|---|---|
| CN (1) | CN106761813B (en) |
| WO (1) | WO2018133493A1 (en) |
Cited By (10)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN108007781A (en) * | 2017-11-17 | 2018-05-08 | 山东科技大学 | Roadway support mechanics simulation experiment system and its method under sound combined load |
| WO2018133493A1 (en) * | 2017-01-23 | 2018-07-26 | 山东科技大学 | Unbalanced support design method for gob-side entry driving under deep unstable cover rock |
| CN109057839A (en) * | 2018-09-06 | 2018-12-21 | 北京交通大学 | A kind of tunnel anchoring system design method and system based on surrounding rock structure |
| CN109655400A (en) * | 2018-12-26 | 2019-04-19 | 天地科技股份有限公司 | Tunnel Analysis of Plastic Region method |
| CN109681248A (en) * | 2018-12-24 | 2019-04-26 | 中国矿业大学 | A kind of grouting cable anchor advanced support method |
| CN110529144A (en) * | 2019-09-26 | 2019-12-03 | 中国矿业大学 | A kind of hybrid advanced support method of light section stope drift active workings |
| CN111677523A (en) * | 2020-05-21 | 2020-09-18 | 中铁六局集团有限公司工程设计院 | Asymmetric selective support method for tunnel with layered surrounding rock |
| CN112343660A (en) * | 2020-11-17 | 2021-02-09 | 中国铁路经济规划研究院有限公司 | Tunnel double-layer preliminary bracing dynamic generation method and device |
| CN113553704A (en) * | 2021-07-13 | 2021-10-26 | 中煤科工集团北京土地整治与生态修复科技研究院有限公司 | Method for judging stability of roadway after completion of open pit control |
| CN114517691A (en) * | 2020-11-19 | 2022-05-20 | 内蒙古双欣矿业有限公司 | Support method for narrow coal pillar roadway surrounding rock |
Citations (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| DE3027661A1 (en) * | 1980-07-22 | 1982-02-18 | Bochumer Eisenhütte Heintzmann GmbH & Co, 4630 Bochum | Mine gallery roof supports and edge securing beams - are anchored lattice girders functioning as initial supports and advance rails |
| CN101634229A (en) * | 2009-08-20 | 2010-01-27 | 同济大学 | Risk-based tunnel supporting structure design method |
| CN102071947A (en) * | 2011-01-21 | 2011-05-25 | 中交四航局第一工程有限公司 | Construction method for soft surrounding rock section of large-span tunnel portal |
| CN102080550A (en) * | 2011-01-30 | 2011-06-01 | 同济大学 | Method for designing double-layer primary support system of large section rock tunnels |
| CN104047614A (en) * | 2014-07-15 | 2014-09-17 | 山东科技大学 | Supporting method for high-expansion argillization soft rock roadway replacement |
| CN105626095A (en) * | 2015-12-29 | 2016-06-01 | 大同煤矿集团有限责任公司 | Small coal pillar protection roadway surrounding rock support method under condition of coal seam group mining hard roof |
Family Cites Families (8)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP4690030B2 (en) * | 2004-12-22 | 2011-06-01 | 前田建設工業株式会社 | Tunnel air displacement measurement system and tunnel air displacement measurement method |
| JP2006322222A (en) * | 2005-05-19 | 2006-11-30 | Metropolitan Expressway Public Corp | Construction method of large-sectional tunnel |
| CN101852083B (en) * | 2010-04-16 | 2011-12-28 | 中国科学院武汉岩土力学研究所 | Quick supporting method for large-deformation roadway easy to fall, break and loosen and apparatus thereof |
| CN204186395U (en) * | 2014-10-30 | 2015-03-04 | 中国电建集团成都勘测设计研究院有限公司 | For the supporting and protection structure of underground chamber unstable rock mass |
| CN104806275A (en) * | 2015-02-12 | 2015-07-29 | 中铁工程装备集团有限公司 | Coal roadway rapid support method in unstable surrounding rock condition |
| CN104747201B (en) * | 2015-02-12 | 2017-02-01 | 中铁工程装备集团有限公司 | Rapid drivage-anchoring integrated equipment for coal road under instable surrounding rock condition |
| CN205422777U (en) * | 2016-03-22 | 2016-08-03 | 三峡大学 | A gob entry support system for roof is unstable |
| CN106761813B (en) * | 2017-01-23 | 2018-04-06 | 山东科技大学 | Gob side entry driving unbalanced support design method under the unstable overlying strata in deep |
-
2017
- 2017-01-23 CN CN201710057753.XA patent/CN106761813B/en active Active
- 2017-10-31 WO PCT/CN2017/108718 patent/WO2018133493A1/en active Application Filing
Patent Citations (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| DE3027661A1 (en) * | 1980-07-22 | 1982-02-18 | Bochumer Eisenhütte Heintzmann GmbH & Co, 4630 Bochum | Mine gallery roof supports and edge securing beams - are anchored lattice girders functioning as initial supports and advance rails |
| CN101634229A (en) * | 2009-08-20 | 2010-01-27 | 同济大学 | Risk-based tunnel supporting structure design method |
| CN102071947A (en) * | 2011-01-21 | 2011-05-25 | 中交四航局第一工程有限公司 | Construction method for soft surrounding rock section of large-span tunnel portal |
| CN102080550A (en) * | 2011-01-30 | 2011-06-01 | 同济大学 | Method for designing double-layer primary support system of large section rock tunnels |
| CN104047614A (en) * | 2014-07-15 | 2014-09-17 | 山东科技大学 | Supporting method for high-expansion argillization soft rock roadway replacement |
| CN105626095A (en) * | 2015-12-29 | 2016-06-01 | 大同煤矿集团有限责任公司 | Small coal pillar protection roadway surrounding rock support method under condition of coal seam group mining hard roof |
Cited By (16)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| WO2018133493A1 (en) * | 2017-01-23 | 2018-07-26 | 山东科技大学 | Unbalanced support design method for gob-side entry driving under deep unstable cover rock |
| CN108007781B (en) * | 2017-11-17 | 2020-05-22 | 山东科技大学 | Dynamic and static combined load roadway support body mechanical simulation test system and method thereof |
| CN108007781A (en) * | 2017-11-17 | 2018-05-08 | 山东科技大学 | Roadway support mechanics simulation experiment system and its method under sound combined load |
| CN109057839B (en) * | 2018-09-06 | 2019-07-05 | 北京交通大学 | A kind of tunnel anchoring system design method and system based on surrounding rock structure |
| CN109057839A (en) * | 2018-09-06 | 2018-12-21 | 北京交通大学 | A kind of tunnel anchoring system design method and system based on surrounding rock structure |
| CN109681248A (en) * | 2018-12-24 | 2019-04-26 | 中国矿业大学 | A kind of grouting cable anchor advanced support method |
| CN109681248B (en) * | 2018-12-24 | 2020-01-17 | 中国矿业大学 | Advanced support method for grouting anchor cable |
| CN109655400A (en) * | 2018-12-26 | 2019-04-19 | 天地科技股份有限公司 | Tunnel Analysis of Plastic Region method |
| CN109655400B (en) * | 2018-12-26 | 2021-02-26 | 天地科技股份有限公司 | Roadway plastic region analysis method |
| CN110529144A (en) * | 2019-09-26 | 2019-12-03 | 中国矿业大学 | A kind of hybrid advanced support method of light section stope drift active workings |
| CN111677523A (en) * | 2020-05-21 | 2020-09-18 | 中铁六局集团有限公司工程设计院 | Asymmetric selective support method for tunnel with layered surrounding rock |
| CN112343660A (en) * | 2020-11-17 | 2021-02-09 | 中国铁路经济规划研究院有限公司 | Tunnel double-layer preliminary bracing dynamic generation method and device |
| CN112343660B (en) * | 2020-11-17 | 2023-01-20 | 中国铁路经济规划研究院有限公司 | Tunnel double-layer preliminary bracing dynamic generation method and device |
| CN114517691A (en) * | 2020-11-19 | 2022-05-20 | 内蒙古双欣矿业有限公司 | Support method for narrow coal pillar roadway surrounding rock |
| CN114517691B (en) * | 2020-11-19 | 2024-08-30 | 内蒙古双欣矿业有限公司 | Supporting method for surrounding rock of narrow coal pillar roadway |
| CN113553704A (en) * | 2021-07-13 | 2021-10-26 | 中煤科工集团北京土地整治与生态修复科技研究院有限公司 | Method for judging stability of roadway after completion of open pit control |
Also Published As
| Publication number | Publication date |
|---|---|
| CN106761813B (en) | 2018-04-06 |
| WO2018133493A1 (en) | 2018-07-26 |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| CN106761813B (en) | Gob side entry driving unbalanced support design method under the unstable overlying strata in deep | |
| CN106894833B (en) | Gob side entry driving unbalanced support structure and construction method under the unstable overlying strata in deep | |
| CN108678769A (en) | Deep Gateway anchor note cuts top master control and stays lane method | |
| CN111305876A (en) | Deep roadway anchoring-splitting grouting-hydraulic fracturing pressure relief cooperative control method | |
| CN104061001B (en) | Gob side entry retaining exploitation support process method | |
| CN107725052B (en) | One kind, which is adopted, stays integration exploitation gob side entry top plate constant-resistance anchor body beam method for protecting support | |
| CN109026024A (en) | A kind of great horizontal stress effect back deformation control method | |
| CN109707422B (en) | High-pressure grouting reinforcing and supporting method for small coal pillars along empty conveying roadway | |
| CN102839984A (en) | Oversized-section underground supporting structure | |
| CN103758529A (en) | Coal mine gob-side entry retaining side supporting method | |
| CN102704965A (en) | Method for preventing tunnel top plate collapse risk caused by severe mining | |
| CN206280090U (en) | High-dipping surrounding rock of actual mining roadway stabilization supporting facility | |
| CN112780276A (en) | Fully-closed blasting pressure relief structure for grouting reconstruction of composite roof and self-retained roadway method | |
| CN109958454A (en) | Stope drift active workings pucking control system and its control method | |
| CN106761867A (en) | High-dipping surrounding rock of actual mining roadway stabilization supporting facility and support process | |
| CN103603682B (en) | A kind of top plate supporting method being applicable to slice drift cemented filling mining | |
| CN111022050B (en) | Fully-closed blasting pressure relief and self-retained roadway method for grouting reconstruction of composite roof | |
| CN104612728B (en) | Roadway supporting method for forming cross point by penetrating through existing roadway | |
| CN105156111B (en) | The method for protecting support of high working face lane formula filling Striping noise | |
| CN106930779A (en) | A kind of special-shaped canopy method for protecting support of micro- arch of high-dipping three soft coal layer re-exploration laneway battered leg | |
| CN110552731A (en) | top coal caving stoping roadway grouting anchor cable supporting structure and advanced supporting method thereof | |
| CN215292504U (en) | Tunnel structure penetrating through large karst cavity top plate | |
| CN106837386B (en) | A kind of ultra thick coal bed fully mechanized anti-risk topmast protection structure of amplification span stope drift active workings | |
| CN104632246A (en) | Large-span underground structure | |
| CN110145363A (en) | A kind of Roof Control method realized fully mechanized coal face and be caving filling mining transition |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| PB01 | Publication | ||
| PB01 | Publication | ||
| SE01 | Entry into force of request for substantive examination | ||
| SE01 | Entry into force of request for substantive examination | ||
| GR01 | Patent grant | ||
| GR01 | Patent grant |