CN107143338B - A kind of coal mine roadway driving and method for protecting support - Google Patents
A kind of coal mine roadway driving and method for protecting support Download PDFInfo
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- CN107143338B CN107143338B CN201710512244.1A CN201710512244A CN107143338B CN 107143338 B CN107143338 B CN 107143338B CN 201710512244 A CN201710512244 A CN 201710512244A CN 107143338 B CN107143338 B CN 107143338B
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- anchor
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Classifications
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- E—FIXED CONSTRUCTIONS
- E21—EARTH DRILLING; MINING
- E21D—SHAFTS; TUNNELS; GALLERIES; LARGE UNDERGROUND CHAMBERS
- E21D9/00—Tunnels or galleries, with or without linings; Methods or apparatus for making thereof; Layout of tunnels or galleries
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- E—FIXED CONSTRUCTIONS
- E21—EARTH 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
- E21D11/04—Lining with building materials
- E21D11/10—Lining with building materials with concrete cast in situ; Shuttering also lost shutterings, e.g. made of blocks, of metal plates or other equipment adapted therefor
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- E—FIXED CONSTRUCTIONS
- E21—EARTH 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
- E21D11/14—Lining predominantly with metal
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- E—FIXED CONSTRUCTIONS
- E21—EARTH 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
- E21D11/14—Lining predominantly with metal
- E21D11/15—Plate linings; Laggings, i.e. linings designed for holding back formation material or for transmitting the load to main supporting members
- E21D11/152—Laggings made of grids or nettings
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- E—FIXED CONSTRUCTIONS
- E21—EARTH 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
- E21D11/14—Lining predominantly with metal
- E21D11/15—Plate linings; Laggings, i.e. linings designed for holding back formation material or for transmitting the load to main supporting members
- E21D11/155—Laggings made of strips, slats, slabs or sheet piles
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- E—FIXED CONSTRUCTIONS
- E21—EARTH DRILLING; MINING
- E21D—SHAFTS; TUNNELS; GALLERIES; LARGE UNDERGROUND CHAMBERS
- E21D20/00—Setting anchoring-bolts
Abstract
The invention discloses a kind of coal mine down-hole tunnel driving and method for protecting support, primarily to roof rock soft broken, laneway molding is difficult when three soft high seam stopes of solution cut eye driving, and then influence the driving problems such as safety and speed.The method of the present invention is will entirely to cut space and excavate to be divided into broken that top forms first passage, planted agent forms second channel and expand to help to form third channel to side to be mined to be total to three phases, the present invention can be good at adapt to top plate extremely the high seam working face large section open*.off top plate weak broken of soft broken the characteristics of, effectively prevent the generation of top plate roof fall accident.
Description
Technical field
The present invention relates to a kind of coal mine roadway driving and method for protecting support, adapt to the high seam work of top plate extremely soft broken
Face large section open*.off driving and supporting.
Background technique
China's coal-mine mining machines degree and application range step up, and working face open-off cut eye height and width constantly increase
Greatly, general use leads the tunneling method that cave expands side secondary tunneling, easily causes in the secondary lane Kuo Bangcheng and cuts a roof fall accident, especially
Roof fall accident takes place frequently in the high seam working face open-off cut eye of top plate extremely soft broken.Thus it is guaranteed that top plate extremely soft broken
High seam working face open-off cut eye safety driving and adjoining rock stability have great economy meaning and social effect.
Currently, the main method that driving face cuts eye is to lead cave to expand side secondary tunneling method, eye is cut using this method driving
When, although first tunneling, a section is lesser to lead cave, and the expansion for then carrying out big depth again, which is helped to be formed, cuts eye, thoroughly eliminates yet
Cut the security risk of a roof fall.One of main cause is: often larger due to cutting a width, width is steady as a country rock is cut
Fixed Dominated Factors, current cave of leading expand the time that side secondary tunneling method has only postponed big width formation, do not account for eliminating
Big width cuts the flexure and buckling effect of eye, and secondary expansions helps to cut eye-shaped at rear, causes to cut a top plate weak broken coal and rock inbreak.
Coal and rock grouting and reinforcing be solve one of back coal and rock effective means, but be confined to cut a pre-pouring grout project amount it is big,
Top plate slip casting effect is poor, the factors such as at high cost, fails to promote and apply on a large scale.To sum up, an existing driving method of cutting is shown
Following problem: 1) an existing driving technology of cutting cannot reach the mesh for preventing top plate weak broken coal and rock roof fall well
's；2) existing to cut that a pre-pouring grout engineering amount is big, security risk is big, top plate slip casting effect is poor, at high cost；3) secondary expansion was helped
Cheng Zhong, roof timbering difficulty is big, and security risk is serious, and it is slow to cut a driving speed；4) can not eliminate cut a top plate flexure effect and
Always there is the hidden danger of roof fall in large span buckling effect.
Summary of the invention
The purpose of the present invention is to provide a kind of coal mine roadway driving and method for protecting support, to overcome in the prior art ask
Topic, the present invention can be good at adapting to the top plate extremely high seam working face large section open*.off top plate weak broken of soft broken
Feature effectively prevent the generation of top plate roof fall accident.
In order to achieve the above objectives, the present invention adopts the following technical scheme:
A kind of coal mine roadway driving and method for protecting support, by entire incisor canal be divided into broken top form first passage, shape of acting as a planted agent
Third channel three phases are formed at second channel and to side to be mined expansion side, specifically includes the following steps:
Step 1: using the channel interface apart from seat earth height H as the bottom surface of first passage basis, part coal of backbreaking
Layer top plate, driving form first passage, carry out supporting to first passage in tunneling process, wherein H is the height of second channel；
Step 2: the tunnel portion of side on coal mining side, which carries out grouting and reinforcing and strengthening supporting, to be waited for first passage；
Step 3: being top surface boundary driving second channel using channel interface, and to the using seat earth as bottom surface basis
It helps to carry out supporting in two channels two；
Step 4: waiting for that coal mining side carries out expansion side to second channel, i.e., driving forms third channel, and to third channel into
Row combined supporting forms and cuts eye by what first passage, second channel and third channel formed.
Further, it backbreaks in step 1 part roof specifically: the false roof of preservation above coal seam and weakness is straight
It connects top to excavate, to stablize the top plate directly pushed up as first passage.
Further, in step 1 to first passage carry out supporting specifically: to first passage top plate totally use anchor pole,
Anchor cable, metal mesh and steel band Combined Support Technology；First passage two is helped overall using anchor pole, anchor cable, metal mesh and steel
Muscle ladder beam Combined Support Technology, stream line are constructed immediately following boring head.
Further, injecting paste material is super poly- concrete in step 2, and strengthening supporting mode is that complement anchor cable is reinforced
Supporting.
Further, second channel two is helped in step 3 to carry out bolting with wire mesh, wherein side use in side to be mined can return
Half davit carries out supporting.
Further, before carrying out combined supporting to third channel in step 4, slip casting first is carried out to the top plate of third channel
It reinforces, and side and lower section progress cable supplement support to third channel.
Further, joint branch is carried out using anchor pole and dual anti-net to side the to be mined side of third channel in step 4
The top plate of shield, third channel carries out combined supporting using anchor pole, anchor cable, metal mesh and steel band, and stream line is met immediately following driving
Head construction.
Compared with prior art, the invention has the following beneficial technical effects:
The present invention can poor, carrying for the high seam working face large section open*.off top plate self-stability of top plate extremely soft broken
The features such as ability difference and big span, using a kind of new tunnelling and method for protecting support.This method can substantially reduce unstable
The flexure effect and buckling effect of large span top plate, fundamentally improve the stress of top plate；The tunnelling technology edge
Seat earth driving cuts a mode compared with along roof arrangement, and solving working face in exploitation process needs under multiple recycle gradually
The process of bundle and two heading heads and the different supporting problem of working face absolute altitude, coal trigonum of not keeping on file improve coal extraction
Rate；Compare and cut front pre-grouting technology before eye is dug, the technology each process intersect influence it is small, multi-process can parallel operations,
Speed of application is fast and safe and reliable.The present invention has rational design, safe and reliable, speed of application is fast, it is extensive to push through application prospect, can be with
Increase substantially the level of security and technical economic benefit of the high seam working face large section open*.off of top plate extremely soft broken.
Further, slip casting effect can be significantly improved to third channel roof reinforcement in side using note chemical grout,
Enhance the overall stability of broken coal rock layer, provide molding basis and safety guarantee for working face extraction equipment installation space,
With significant consolidation effect；Carry out cable supplement support to it on the basis of third channel top plate bolting with wire mesh, while
Also there is cable supplement support in one side, and integral reinforcing effect is good, and Surrounding Rock Strength is high.
Detailed description of the invention
Fig. 1 is first passage supporting cross-section diagram；
Fig. 2 is grouted anchor bar structural schematic diagram；
Fig. 3 is grouting system equipment arrangement schematic diagram；
Fig. 4 is grouting construction process flow chart；
Fig. 5 is second channel supporting cross-section diagram；
Fig. 6 is spin anchor structure schematic diagram；
Fig. 7 is third channel supporting cross-section diagram；
In figure: 1-first passage；2-second channels；3-third channels；4-channel interfaces；5-seat earths；
6-roofs；7-twisted steel anchor rods；8-anchor cables；9-grouted anchor bars；10-conical ends；11-grouted anchor bar bars
Body；12-slurry outlets；13-retaining rings；14-A group materials；15-B group materials；16-grouting pumps；17-high-pressure rubber hoses；18—
Filling gun；19-sealers；20-recoverable anchor rods；21-squeeze precession conehead；22-spin anchor rod bodies；23-rotation silks；
24-pre-load nuts；25-butterfly pallets；26-country rock surfaces；27-glass fibre reinforced plastics rockbolts.
Specific embodiment
Present invention is further described in detail with reference to the accompanying drawing:
Referring to Fig. 1 to Fig. 7, a kind of coal mine down-hole tunnel driving of the invention and method for protecting support, primarily to solving three
When soft high seam stope cuts eye driving, roof rock soft broken, laneway molding is difficult, so influence driving safety and
The problems such as speed.The method of the present invention is will entirely to cut space and excavate to be divided into broken that top forms first passage 1, planted agent's formation second is led to
Road 2 and expands side to side to be mined and forms third channel 3 and be total to three phases, comprising the following steps:
Step 1: with the channel interface apart from 5 certain distance of seat earth (height that certain distance refers to second channel 2)
4 is basic for the bottom surface of first passage 1, and part roof 6 of backbreaking abolishes false roof, and driving forms first passage 1, i.e., by coal seam
The false roof of top preservation is excavated with weak directly top, and the top plate for first passage 1, tunneling process are preferably directly pushed up with stability
In in time to first passage 1 carry out supporting, top plate use anchor pole+anchor cable+metal mesh+steel band Combined Support Technology, two help to use
Anchor pole+anchor cable+metal mesh+reinforcing bar ladder beam Combined Support Technology implements combined supporting step by step, and stream line is immediately following driving
It meets head on to construct；
Step 2: carrying out grouting and reinforcing and strengthening supporting to the tunnel portion of side of the advance of the face direction side of first passage 1,
Injecting paste material is super poly- concrete, and super poly- concrete is made of A group material 14 and B group material 15, A group material 14 and B group material
15 using inorganic material as aggregate, using various kinds of resin as binding material, the characteristics of having both inorganic and high-molecular organic material, has
The advantages that cohesiveness is good, early strength is high, curing time is adjustable, security performance is high, at low cost, is detailed in patent
CNCN201110207625.1, strengthening supporting mode are 8 strengthening supporting of complement anchor cable；Wherein chemical grouting using theoretical calculation and
The method that numerical simulation combines primarily determines out the parameters of slip casting, and depth, grouting pressure, slip casting including injected hole expand
Array pitch, grouting sequence and grouted anchor bar single hole grouting amount etc. between radius, slip casting time, injected hole are dissipated, then according to field engineering
Practice effect carries out feedback analysis, can optimize to every grouting parameter；
Step 3: being bottom surface basis with seat earth 5, is top surface boundary driving second channel 2 with channel interface 4, and
It helps to carry out bolting with wire mesh to two in time, wherein side to be mined side selects recoverable anchor rod 10 to carry out supporting；
Step 4: carrying out expansion side to the side to be mined of second channel 2, i.e., driving forms third channel 3, to third channel
On the basis of 3 top plates carry out grouting and reinforcing, cable supplement support is carried out to it from side and lower section, then to third channel 3 and
Shi Jinhang combined supporting, wherein side to be mined side carries out supporting using anchor pole+dual anti-net, top plate uses anchor pole+anchor cable+metal
Net+steel band carries out supporting, and stream line is constructed immediately following boring head, and second channel 2 and third channel 3 together constitute and cut eye time
The space for adopting equipment installation, so far cuts eye and has been formed, i.e., be made of first passage 1, second channel 2 and third channel 3.
The present invention preferentially tunnels the pole weak broken wall rock that first passage 1 is working face extraction equipment installation space top plate and infuses
Slurry provides condition, in the side slip casting of above-mentioned pole weak broken wall rock, on the one hand ensure that the safety in Grouting engineering space, separately
On the one hand it is more preferable slip casting surrounding rock consolidation effect to be carried out in weak surrounding rock lower space compared with directly.
The diameter of the grouted anchor bar 9 used when slip casting is Φ 20mm~Φ 25mm.The determination of drilling depth is using numerical value
Simulate determine first passage 1 formed after plastic zone of surrounding rock range as determination slip casting hole depth reference frame.When slip casting
Between determination be obtained by numerical simulation working face with slip casting time change slurry infiltration areal map and pore pressure spread
Cloud atlas, slurries diffusion velocity is very slow and as suitable slip casting time when tending towards stability.Grouting sequence is from bottom to top, i.e., first to infuse
Help foot, then intermediate and side top is infused, the grouting mode in hole is jumped using interval.
The stability of top plate when working face open-off cut Yan Kuo lane secondary tunneling is to influence incisor canal speed and guarantee that safety digs lane
Key factor.The present invention excavates working face open-off cut eye spatial decomposition at three channels stage by stage, logical by driving first
Road 1 provides space for top plate coal rock layer Grouting engineering, while side portion's Anchor reinforced support of constructing, and further enhances its stabilization
Property.It, can be in lag 1 suitable distance of first passage construction second channel 2 when the conditions permits such as worker's technical level, construction organization；
If equipment equipment allows, can also construct second channel 2 and third channel 3 simultaneously.
Operating process of the invention is described in detail below with reference to embodiment:
A kind of coal mine roadway driving and method for protecting support of the present invention, are divided into brokenly top for entire incisor canal and form first
Channel 1, planted agent, which form second channel 2 and expand side, forms 3 three phases of third channel, comprising steps of
Step 1: any end being connected to using two lanes with working face open-off cut eye is starting point, apart from 5 certain distance of seat earth
Channel interface 4 be first passage 1 base plinth, part roof 6 of backbreaking abolishes false roof, using development machine or quick-fried
Broken mode tunnels first passage 1, which is the tunnel for being connected to air return lane and air inlet.
Step 2: carrying out anchor pole+anchor cable+metal mesh+steel band branch to top plate for the stability for guaranteeing 1 country rock of first passage
Shield, stream line arrangement alternate with anchor pole, anchor cable are constructed immediately following boring head.7 length of twisted steel anchor rod is 2.4m, and an array pitch is
900×800mm；Anchor cable 8 select seven strands of prestress wires, specification be 17.8 × 6000mm of Φ, array pitch be 1400 ×
1600mm, anchor pole cooperate 300 × 300 × 10mm drum type pallet, and anchor cable cooperates steel band cushioning 400 × 400 × 12mm flat pallet.
Two help to carry out supporting with anchor pole+metal+reinforcing bar ladder beam+anchor cable, to avoid the later period to 3 roof timbering of third channel
It impacts, anchor cable and anchor pole are arranged on same section, and anchor cable lag boring head 30m construction.Bolt interval is 800
× 800mm, array pitch is 1600 × 1600mm between anchor cable, and help foot anchor pole is not more than 300mm away from bottom plate distance, lags first passage 1
On boring head certain distance to 1 working face lateral wall of first passage carry out 8 reinforcement supporting of anchor cable, array pitch be 1600 ×
1600mm, the same roof timbering of the parameters such as pallet, supporting cross-section diagram are as shown in Figure 1.Twisted steel anchor rod pretightning force in coal seam and rock stratum
Square is not less than 200Nm and 250Nm, and anchor cable pretightning force is not less than 8T, and to anchor pole, rope pretightning force after having constructed 7 days
(square) carries out secondary preload, to eliminate the springback influence of pretightning force (square).
Step 3: carrying out slip casting to the work of first passage 1 surface side tunnel portion of side.Grouting parameter should be according to theoretical calculation, number
Value simulation primarily determines, and is advanced optimized according to field conduct effect, and major parameter includes grouting pressure, slurries diffusion half
Array pitch, grouting sequence etc. between diameter, slip casting time, injected hole.
Grouted anchor bar 9 is mounted on the portion of side side to be mined of first passage 1.9 protruded length 100mm of grouted anchor bar is used
26 bit bore of Φ is to projected depth, hole depth 2.2m.Grouted anchor bar 9 is put into drilling, is then put into along anchor pole bar diameter hollow
Annular cement volume is blocked with the gauze of dipping cement slurry.It is that a kind of dual liquid type changes that injecting paste material, which selects Bo Leiyin, Bo Leiyin,
Property polyurethane injecting paste material, be made of 15 two kinds of liquid components of A group material 14 and B group material, carried out by weight 1:1 when construction
Mixing.Slip casting from bottom to top in same section, i.e., first infuse help foot, then infuse in side, finally note side top；Different section class interval note
Slurry, every 8 row are one group, i.e., first carry out 1,3,5,7 single slip castings, then carry out 2,4,6,8 double rows slip castings, successively alternately.Note
It starches pressure and is not more than 3Mpa.The single hole slip casting time is 10~13min.To guarantee that slip casting can be closely knit by fracture filling, answer in principle
Infuse to it is unobvious eat slurry until.After the completion of slip casting, in grouted anchor bar exposed junction cushioning pallet, and pre-tightened with nut, pre-fastening moment
Not less than 150Nm.
9 structural schematic diagram of grouted anchor bar is as shown in Figure 2.9 front end of grouted anchor bar is conical end 10, and length K is
200mm, and firm welding.The grouted anchor bar body of rod 11 arranges that Φ 8mm slurry outlet 12, pitch-row d=200mm are in five flower-shaped arrangements, bar
Outer diameter D=22mm, wall thickness 3mm, do not set slurry outlet in the L=500mm of body of rod rear end, thread segment S=100mm, and retaining ring 13 is high
5mm.As country rock extremely it is broken cause drilling can not pore-forming, then Self-propelled grouting anchoring-bolt can be selected.Grouting system equipment arrangement is shown
It is intended to as shown in Figure 3.
Grouting construction process flow chart is as shown in Figure 4.Drilling → installation grouted anchor bar 9 → installation 19 → high pressure of hole packer
Rubber tube 17 connects filling gun 18 and grouting pump 16 → two root canals are respectively connected in A group material 14 and B group material 15 → is opened
Open grouting pump 16 → reach slip casting requirement → closing grouting pump 16 → disassembly filling gun 18.
Before each slip casting class uses grouting pump, should all check whether equipment is normal by way of with pump suction clear water
Work, including grouting pipeline, pressure gauge etc..
Step 4: driving second channel 2.It is acted as a planted agent first passage 1 to seat earth 5 using development machine or big gun pick mode
Between driving form second channel 2, and help to carry out anchor pole+metal mesh+reinforcing bar ladder beam supporting to two, array pitch is 800 ×
800mm, side side to be mined carry out supporting with recoverable prestressed anchor pole 20, and recoverable anchor rod 20 selects spirally recyclable anchor
Bar carries out supporting to country rock using the frictional force and pretightning force of rotation silk 23 and fastener offer on spin anchor rod body 22.
For remaining parameter with the requirement of first passage 1, supporting section is as shown in Figure 5.
Recoverable anchor rod 20, i.e., recyclable prestressed anchor structural schematic diagram are as shown in Figure 6.20 front end of recoverable anchor rod is
Precession conehead 21, length N=50mm are squeezed, spin 22 diameter of anchor rod body is 20mm, is covered with rotation silk on the anchor rod body 22 that spins
23, rotation silk spacing M are 30~40mm, and rotation silk height is 4~7mm.Dish is held in the palm by applying torque to pre-load nut 24 rear end
Disk 25 is close to country rock surface 26, has the function that apply pretightning force to recoverable anchor rod 20.The anchor pole is to bore anchoring integrated anchor rod,
I.e. without using Anchor Agent, the initial deformation of dependence and weak surrounding rock is fast and boring aperture and body of rod nominal diameter similar in
Feature realizes pretightning force and guarantees anchor force.
Step 5: driving third channel 3.Using development machine or big gun pick mode to the side to be mined of second channel 2 help into
Row expands side and forms third channel 3, carries out anchor pole+anchor cable+metal mesh+steel band combined supporting, roofbolt and anchor cable cloth to top plate
It sets in same section, and helps portion's support anchor rod, section where rope to be staggered half of array pitch, i.e. 400mm with first passage 1, wherein
Anchor cable is constructed immediately following boring head.Array pitch is 1500 × 1600mm between three anchor cables of top plate, remaining parameter is the same as 1 top plate of first passage
Supporting requirement.
Side side to be mined anchor pole+dual anti-net supporting, anchor pole select glass fibre reinforced plastics rockbolts 27, and glass steel tray selects spherical shell
Thickness and height are respectively the pallet of 7mm and 18mm.Supporting section is as shown in Figure 7.
Step 6: checking Grouting engineering consolidation effect, it can be used that 3 roof strata of third channel drill and peep
The method that inspection is looked into observes roof strata fracture filling situation；Analysis is optimized to supporting parameter, mainly by top plate
Rock stratum absciss layer is monitored, and checks the stability of top plate entirety, adjusts supporting parameter.
The above is only presently preferred embodiments of the present invention, not any limitation of the invention, it is all according to the present invention
Technical spirit any simple modification change and equivalent structural changes made to the above embodiment, belong to of the invention
In the protection scope of technical solution.
Claims (7)
1. a kind of coal mine roadway driving and method for protecting support, which is characterized in that entire incisor canal is divided into brokenly top formation first and is led to
Road (1), planted agent, which form second channel (2) and expand side to side to be mined, forms third channel (3) three phases, specifically includes
Following steps:
Step 1: it with the bottom surface basis that the channel interface (4) apart from seat earth (5) height H is first passage (1), backbreaks
Part roof (6), driving are formed first passage (1), carry out supporting to first passage (1) in tunneling process, and wherein H is the
The height in two channels (2)；
Step 2: grouting and reinforcing and strengthening supporting are carried out to the tunnel portion of side on first passage (1) side to be mined；
Step 3: being bottom surface basis with seat earth (5), is that second channel (2) are tunneled on top surface boundary with channel interface (4),
And second channel (2) two is helped to carry out supporting；
Step 4: carrying out expansion side to second channel (2) side to be mined, i.e., driving forms third channel (3), and to third channel
(3) combined supporting is carried out, that is, is formed and cuts eye by what first passage (1), second channel (2) and third channel (3) formed.
2. a kind of coal mine roadway driving according to claim 1 and method for protecting support, which is characterized in that portion of backbreaking in step 1
Divide roof (6) specifically: the false roof of preservation above coal seam and weak directly push up are excavated, directly pushed up using stablizing as first
The top plate in channel (1).
3. a kind of coal mine roadway driving according to claim 1 and method for protecting support, which is characterized in that first in step 1
Channel (1) carries out supporting specifically: totally uses anchor pole, anchor cable, metal mesh and steel band joint branch to first passage (1) top plate
Shield；First passage (1) two is helped totally using anchor pole, anchor cable, metal mesh and reinforcing bar ladder beam combined supporting, wherein to first
Channel (1) top plate is overall and helps overall anchor cable to closely follow boring head construction first passage (1) two.
4. a kind of coal mine roadway driving according to claim 1 and method for protecting support, which is characterized in that slip casting material in step 2
Material is super poly- concrete, and strengthening supporting mode is that complement anchor cable (8) carry out strengthening supporting.
5. a kind of coal mine roadway driving according to claim 1 and method for protecting support, which is characterized in that second in step 3
Channel (2) two is helped to carry out bolting with wire mesh, wherein side to be mined side carries out supporting using recoverable anchor rod (20).
6. a kind of coal mine roadway driving according to claim 1 and method for protecting support, which is characterized in that third in step 4
Before channel (3) carries out combined supporting, grouting and reinforcing first is carried out to the top plate of third channel (3), and to the side of third channel (3)
Cable supplement support is carried out with lower section.
7. a kind of coal mine roadway driving according to claim 1 and method for protecting support, which is characterized in that third in step 4
Side the to be mined side in channel (3) carries out combined supporting using anchor pole and dual anti-net, the top plate of third channel (3) using anchor pole,
Anchor cable, metal mesh and steel band carry out combined supporting, and stream line is constructed immediately following boring head.
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| CN107654247B (en) * | 2017-09-22 | 2019-04-16 | 中国矿业大学 | A kind of sliding structure area pole loose thick coal layer coal roadway tunneling is met head on anti-top coal leakage method for leakage |
| CN108035742B (en) * | 2017-11-16 | 2023-04-14 | 河南理工大学 | Active and passive harmonious support method for extremely soft coal seam roadway |
| CN109958459B (en) * | 2019-03-05 | 2021-07-23 | 辽宁工程技术大学 | Soft thick coal seam bottom tunneling method |
| CN111663945A (en) * | 2020-05-27 | 2020-09-15 | 山东黄金矿业(莱州)有限公司三山岛金矿 | Open roof cutting roadway type upward wide drift filling mining method |
| CN112664248A (en) * | 2020-12-25 | 2021-04-16 | 国家能源集团宁夏煤业有限责任公司 | Soft rock water spraying roadway supporting method |
| CN113153315A (en) * | 2021-04-26 | 2021-07-23 | 中国矿业大学 | Deep large-section hole-cutting roadway-forming mode and method for determining supporting time |
| CN113914867A (en) * | 2021-10-12 | 2022-01-11 | 国能神东煤炭集团有限责任公司 | Top plate reinforcing method for tunneling lower layering cut hole under upper layering goaf |
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