CN106121644A - Water-filling pressure-bearing unloading pressure by blasting based on drilling in coal and rock plane crosslinking cellular structure and supporting reinforcement - Google Patents
Water-filling pressure-bearing unloading pressure by blasting based on drilling in coal and rock plane crosslinking cellular structure and supporting reinforcement Download PDFInfo
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- CN106121644A CN106121644A CN201610440600.9A CN201610440600A CN106121644A CN 106121644 A CN106121644 A CN 106121644A CN 201610440600 A CN201610440600 A CN 201610440600A CN 106121644 A CN106121644 A CN 106121644A
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- 239000011435 rock Substances 0.000 title claims abstract description 82
- 239000003245 coal Substances 0.000 title claims abstract description 81
- 238000004132 cross linking Methods 0.000 title claims abstract description 54
- 238000005422 blasting Methods 0.000 title claims abstract description 47
- 238000005553 drilling Methods 0.000 title claims abstract description 39
- 230000008093 supporting effect Effects 0.000 title claims abstract description 38
- 210000003850 cellular structure Anatomy 0.000 title claims abstract description 21
- 230000002787 reinforcement Effects 0.000 title claims abstract description 21
- 238000007789 sealing Methods 0.000 claims abstract description 73
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 claims abstract description 51
- 238000002347 injection Methods 0.000 claims abstract description 49
- 239000007924 injection Substances 0.000 claims abstract description 49
- 238000000034 method Methods 0.000 claims abstract description 12
- 238000005728 strengthening Methods 0.000 claims abstract description 7
- 239000000843 powder Substances 0.000 claims description 21
- 238000004880 explosion Methods 0.000 claims description 15
- 238000007569 slipcasting Methods 0.000 claims description 14
- 239000002360 explosive Substances 0.000 claims description 12
- 238000010276 construction Methods 0.000 claims description 7
- 238000004519 manufacturing process Methods 0.000 claims description 7
- 238000005336 cracking Methods 0.000 claims description 6
- 238000013461 design Methods 0.000 claims description 6
- 239000011440 grout Substances 0.000 claims description 6
- 230000001360 synchronised effect Effects 0.000 claims description 6
- 230000000977 initiatory effect Effects 0.000 claims description 4
- 238000000465 moulding Methods 0.000 claims description 4
- 239000002002 slurry Substances 0.000 claims description 4
- 238000003466 welding Methods 0.000 claims description 4
- 238000004140 cleaning Methods 0.000 claims description 3
- 230000008569 process Effects 0.000 claims description 3
- 238000009792 diffusion process Methods 0.000 claims description 2
- 239000000463 material Substances 0.000 claims description 2
- 239000002184 metal Substances 0.000 claims description 2
- 238000011002 quantification Methods 0.000 claims description 2
- 238000007493 shaping process Methods 0.000 claims description 2
- PEDCQBHIVMGVHV-UHFFFAOYSA-N Glycerine Chemical compound OCC(O)CO PEDCQBHIVMGVHV-UHFFFAOYSA-N 0.000 claims 1
- 230000002093 peripheral effect Effects 0.000 claims 1
- 230000000694 effects Effects 0.000 abstract description 9
- 239000007921 spray Substances 0.000 abstract description 2
- 238000012546 transfer Methods 0.000 description 5
- 238000005516 engineering process Methods 0.000 description 4
- 239000003566 sealing material Substances 0.000 description 4
- 230000009471 action Effects 0.000 description 3
- 230000008595 infiltration Effects 0.000 description 3
- 238000001764 infiltration Methods 0.000 description 3
- 238000004080 punching Methods 0.000 description 3
- 230000009286 beneficial effect Effects 0.000 description 2
- 238000009826 distribution Methods 0.000 description 2
- 238000011068 loading method Methods 0.000 description 2
- 239000002609 medium Substances 0.000 description 2
- 238000005065 mining Methods 0.000 description 2
- 238000012986 modification Methods 0.000 description 2
- 230000004048 modification Effects 0.000 description 2
- 238000005457 optimization Methods 0.000 description 2
- 230000003068 static effect Effects 0.000 description 2
- 241001074085 Scophthalmus aquosus Species 0.000 description 1
- 239000012736 aqueous medium Substances 0.000 description 1
- 230000015572 biosynthetic process Effects 0.000 description 1
- 238000000151 deposition Methods 0.000 description 1
- 239000003814 drug Substances 0.000 description 1
- 229940079593 drug Drugs 0.000 description 1
- 230000007613 environmental effect Effects 0.000 description 1
- 230000006698 induction Effects 0.000 description 1
- 239000004615 ingredient Substances 0.000 description 1
- 238000002955 isolation Methods 0.000 description 1
- 238000012423 maintenance Methods 0.000 description 1
- 230000008439 repair process Effects 0.000 description 1
- 238000011160 research Methods 0.000 description 1
- 238000007711 solidification Methods 0.000 description 1
- 230000008023 solidification Effects 0.000 description 1
- 239000000243 solution Substances 0.000 description 1
Classifications
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- E—FIXED CONSTRUCTIONS
- E21—EARTH OR ROCK DRILLING; MINING
- E21C—MINING OR QUARRYING
- E21C41/00—Methods of underground or surface mining; Layouts therefor
- E21C41/16—Methods of underground mining; Layouts therefor
- E21C41/18—Methods of underground mining; Layouts therefor for brown or hard coal
-
- E—FIXED CONSTRUCTIONS
- E21—EARTH OR ROCK DRILLING; MINING
- E21B—EARTH OR ROCK DRILLING; OBTAINING OIL, GAS, WATER, SOLUBLE OR MELTABLE MATERIALS OR A SLURRY OF MINERALS FROM WELLS
- E21B33/00—Sealing or packing boreholes or wells
- E21B33/10—Sealing or packing boreholes or wells in the borehole
- E21B33/13—Methods or devices for cementing, for plugging holes, crevices or the like
-
- E—FIXED CONSTRUCTIONS
- E21—EARTH OR ROCK DRILLING; MINING
- E21B—EARTH OR ROCK DRILLING; OBTAINING OIL, GAS, WATER, SOLUBLE OR MELTABLE MATERIALS OR A SLURRY OF MINERALS FROM WELLS
- E21B7/00—Special methods or apparatus for drilling
-
- 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
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F42—AMMUNITION; BLASTING
- F42D—BLASTING
- F42D1/00—Blasting methods or apparatus, e.g. loading or tamping
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F42—AMMUNITION; BLASTING
- F42D—BLASTING
- F42D3/00—Particular applications of blasting techniques
- F42D3/04—Particular applications of blasting techniques for rock blasting
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Abstract
The invention discloses a kind of water-filling pressure-bearing unloading pressure by blasting based on drilling in coal and rock plane crosslinking cellular structure and supporting reinforcement, by setting crosslinking boring in coal petrography, on the one hand the discharge space in coal and rock is effectively increased, on the other hand by the method for water-filling pressure-bearing unloading pressure by blasting in employing hole, take full advantage of the efficient uniform posting characteristic of water, in expanding coal body, cross-link the release range of disturbance of boring.Crosslinking boring discharge space is extensively cross-linked through, defines the unloading pressure by blasting circle of entirety, and release effect is notable." anchor/net/canopy strengthening supporting circle crosslinking hole pattern injection hole sealing reinforcement support circle crosslinking hole pattern unloading pressure by blasting circle stress of primary rock circle " structure formed based on the method, meet " strong and weak strong " support idea in coal petrography support theory, and effectively overcome the difficult problems such as the strong motion under the interior conventional charge blasting condition of boring, many spray orifices, difficult supporting.
Description
Technical field
The present invention relates to a kind of water-filling pressure-bearing unloading pressure by blasting based on drilling in coal and rock plane crosslinking cellular structure and supporting is mended
Strong method, can be used for the heavily stressed transfer of deep coal petrography, the exploitation of heavily stressed coal seam pressure relief and improves stablizing of surrounding rock structure
Field.
Background technology
The background produced with the intensive high intensity of current coal, the superficial part resource that can cut coal gradually tends to exhausted, deeply
The exploitation of portion's coal petrography resource utilizes the main flow just becoming current coal production.Along with the increase of the coal mining degree of depth, coal seam height should
Power occurrence condition seriously constrains the safe and efficient production in colliery.Such as, under the coal mining high stress environment of deep, roadway surrounding rock
Deformation is big, and pucking is serious, and drift section strongly reduces, and side coal and rock rock burst in lane is frequent, and supporting construction badly broken etc. causes lane
Road useful area reduces, difficult supporting, and repair rate is high, and maintenance cost dramatically increases；For stope support, force piece pressure
Frame accident is frequent, pillar well damage, and coal wall caving degree and the frequency are high, and coal seam yields poorly, and work surface strong ore deposit voltage-frequency is numerous, Gao Ying
The safety in production of mine in top board induction type impulsion pressure more serious threat under the conditions of power.Therefore, liberation Deep Mine coal petrography
High stress environment, it is achieved heavily stressed effective release transfer in the coal and rock of deep, is current deep fractures safety and high efficiency
Important leverage, and research and develop efficient coal petrography heavily stressed release transfer techniques and become the key solving this problem.
At present, the coal petrography of main flow heavily stressed release transfer techniques mainly include hole release, hydraulic fracture, standing with
And corresponding deriving technology etc..Wherein, boring release is mainly by being drilled with wide-aperture drilling in coal and rock, it is provided that bigger release is empty
Between, it is achieved the heavily stressed release of coal and rock is shifted, but relief range is little, and effect is sluggish, needs the longer release cycle to take effect,
And set intensive large aperture destressing borehole, add boring and be drilled with cost；Hydraulic fracture is then main by sealing of hole problem system
About, technical costs is of a relatively high, and is in three-dimensional high-stress state inside the deep hole under high stress environment, and coal petrography fracturing pressure is strong
Degree requires height, and hydraulic fracture equipment and sealing of hole equipment are more proposed high requirement, the in addition filter of deep hole distance coal petrography fracturing section
Lose impact, the most indirectly reduce high-pressure hydraulic fracturing effect；For the standing release under the conditions of conventional charge in boring, again
Exist physics unloading pressure by blasting and chemistry charge explosion release point, but no matter which kind of unloading pressure by blasting mode, its ultimate principle is all
Utilize the high-effect effective expansion boring discharge space of explosion, it is achieved the heavily stressed transfer in the range of coal and rock blast disturbance, release
Effect is relatively notable, but this technology exists blasting energy height, drilling and sealing difficulty, and the easy punching of sealing material highlights, formed bigger
Country rock explosive funnel, coal production and surrounding rock supporting etc. are impacted.
To sum up analyze, the present invention provide based on drilling in coal and rock plane crosslinking cellular structure water-filling pressure-bearing unloading pressure by blasting and
Supporting reinforcement, breaks rock effect by the infiltration of artesian water in country rock hole, efficient uniform posting and static pressure and effectively improves
Coal petrography unloading pressure by blasting and surrounding rock supporting effect, the " anchor/net/canopy strengthening supporting circle-crosslinking hole pattern injection hole sealing reinforcement supporting of formation
Circle-crosslinking hole pattern unloading pressure by blasting circle-stress of primary rock circle " structure, meet " strong-weak-strong " support idea in coal petrography support theory,
Effectively overcome the difficult problems such as the strong motion under the interior conventional charge blasting condition of boring, many spray orifices and difficulty supporting, there is skill widely
Art promotion and application are worth.
Summary of the invention
The present invention is directed to the heavily stressed Environmental effect of Deep Mine, it is provided that based on drilling in coal and rock plane crosslinking cellular structure
Water-filling pressure-bearing unloading pressure by blasting and supporting reinforcement, the crosslinking that the method is holed based on plane is through, has given full play to crosslinking hole
The infiltration of artesian water medium in net, efficient uniform posting and static pressure break rock effect, define the characteristic under these technical conditions
" strong-weak-strong " supporting structure system.
The technical solution used in the present invention is: a kind of water-filling pressure-bearing explosion based on drilling in coal and rock plane crosslinking cellular structure
Release and supporting reinforcement, mainly include plane crosslinking boring lay, in hole powder charge and pipeline arrange, quick injection hole sealing with
And water filling in hole, aerofluxus and powder charge ignite operation, specifically include following steps:
1) for specific coal petrography occurrence condition, specify discharge space scope, design plane drilling parameter, determine reasonable hole
Deeply, the pitch of holes ,/parameter such as elevation angle degree and release aperture of inclining.
2), after destressing borehole parameter determination, high-power rig is used to carry out order drilling operation.During drilling, strictly control
Rig processed is drilled precision so that the cellular structure after molding is cross-linked with each other, and in the range of being in same plane.
3) after plane cellular structure is formed, to same row to blast hole clean in advance, remaining coal petrography powder in cleaning hole, so
After in blast hole quantification powder charge, and synchronize water injection pipe and exhaustor are installed.Primacord is used to ignite explosive in hole, by primacord
Arrange outside fairlead along hole wall in conjunction with water injection pipe and exhaustor.
4) in the boring corresponding with position, boundary, Fei Bao district of blast area, install salient angle umbrella in advance to buckle, prevent blast area boring note
In slurry sealing of hole operation process, sealing of hole section serosity is to Fei Bao district crosslinking hole pattern diffusion.The special quick injection hole sealing of soft plasticity is used to fill
Put, porous synchronous row same to blast area coal petrography to sealing of hole section carry out quick injection hole sealing operation, the hole sealing device installing degree of depth
Unanimously.
5), after sealing of hole section grout cures, porous synchronous water filling, aerofluxus operation are started.Persistently flow out when there being current in exhaustor
Time, close exhaustor stop valve, water injection pipe continues water filling supercharging, binds primacord and detonator simultaneously and carries out big gun line line work
Industry, after personnel remove safety place, explosive in detonating primer and hole.
6) in coal and rock, in hole after explosive initiation, define " crosslinking hole pattern injection hole sealing reinforcement support circle-crosslinking hole pattern
Unloading pressure by blasting circle-stress of primary rock circle ".For avoiding the unstability of country rock near region coal and rock that production is impacted, also need manually to set up
Or the country rock anchor/net/canopy supporting construction after optimization explosion, form the anchor/net/canopy strengthening supporting circle of little scope, improve country rock steady
Qualitative.
As preferably, described step 1) borehole blasting destressing borehole parameter arranges: the boring selected should be advisable with large aperture,
General 60～about 100mm, on the one hand provide sufficient discharge space for coal and rock, be the most then conducive to the dress in later stage
Medicine and sealing of hole operation, through the most advantageously for realizing the crosslinking of same plane boring；Efficient posting performance based on water with
And for meeting the stable of country rock near region coal and rock and reinforcement supporting requirement, crosslinking drilling and sealing length generally boring total length
40%～60% is advisable；For the spacing of wells and hole depth mostly depending on coal petrography intensity and stress of primary rock condition depending on, for hard coal
Rock should follow that short-bore is deep, Small Distance principle as far as possible, it is ensured that has higher hole pattern in coal and rock unit section and cross-links through degree, carries
High explosion high energy efficiency and the abundant release to hard coal petrography of the efficient posting of aqueous medium, then should suitably strengthen vice versa for soft coal petrography
Hole depth and pitch of holes.
Higher for the boring craft precision requirement of drilling of coal petrography plane.During drilling, for shifting setting parameter, the brill of rig
The azimuthal tune of bar sets and original position parameter setting etc. of holing is intended to meet certain required precision, so that it is guaranteed that after molding
Boring is cross-linked with each other, and is in same plane scope.If molding boring place plane space layer phase difference is farther out, then debugging is needed to drill
Parameter is punched again.
As preferably, described step 3) in borehole charge arrange operation with pipeline: for general drilling in coal and rock, set
Face upward tendency boring be beneficial to drill during coal petrography powder rafting the clear hole operation with the later stage, the now note in blast hole
The water pipe installing degree of depth only requires more than sealing of hole section 0.1～0.3m, and exhaustor then needs to be installed up to position at the bottom of hole；For nutation tendency
Boring, then need to assist clear hole facility by corresponding, and coal petrography powder remaining in clearing hole now needs water injection pipe is installed up to hole
The end, and exhaustor is exceeded drilling and sealing section 0.1～0.3m.Meanwhile, use primacord to ignite explosive in hole, primacord need to be joined
Arrange outside fairlead along hole wall respectively with water injection pipe and exhaustor.
As preferably, described step 4) borehole blasting district injection hole sealing operation: special salient angle umbrella need to be installed in advance and buckle, by quick-fried
Broken district and Fei Bao district drilling and sealing section are mutually isolated, row same for blast area to boring carry out injection hole sealing operation and need to use
Special soft plasticity rapid hole sealing device, including umbrella button-type plugging device, Grouting Pipe and biconial pipe for drilling and sealing section
Piecing devices；
Described umbrella button-type plugging device includes that salient angle umbrella is buckled and smooth umbrella is buckled, and the most curved on the rigidity that salient angle umbrella is buckled pawl sets
Salient angle, base buckled by salient angle umbrella is cylindrical metal base, and its diameter is less than Grouting Pipe internal diameter, and base edge is polished into smooth in advance
Chamfering；Smooth umbrella is buckled, and for falling the ring buckle of pawl with conventional rigid, ring buckle internal diameter is more than Grouting Pipe external diameter, and its external diameter is less than
Bore diameter, salient angle umbrella is buckled and smooth umbrella is buckled down and connected into umbrella by soft plasticity lamellar ductile material between pawl；
Described Grouting Pipe is soft plasticity Grouting Pipe of cracking；
Described biconial pipe joint arrangement includes conical pipe male contact and conical pipe famale connector, wherein outside conical pipe famale connector
If swivel nut, there is gasket seal swivel nut and conical pipe famale connector junction；Conical pipe male contact end is with check valve and external screw thread
Device, the welding of conical pipe male contact afterbody connects famale connector soon, connects famale connector soon hose connection with slip casting by connecing male contact soon；
A kind of quick slip-casting hole-sealing method of soft plasticity using said apparatus, comprises the following steps:
1) first, according to drilling in coal and rock purposes, the hole base space beyond drilling and sealing section arranges pipeline or powder charge in advance,
And pipeline is drawn along hole wall country rock；
2) according to boring bore, sealing of hole segment length requirement, the soft plasticity note of selection, cut respective type, length and bore
Slurry pipe, selected Grouting Pipe bore is the 40%～60% of boring bore, and passes in and out uninterrupted according to Grouting Pipe, designs Grouting Pipe
Crack bar number, cracking length and width, does not crack at the two ends of Grouting Pipe；
3) after Grouting Pipe of cracking machine-shaping, salient angle umbrella being buckled the front end being built in Grouting Pipe, umbrella is buckled salient angle and is arranged and to protect
Grouting Pipe inwall is not touched at the tip of card rigidity pawl, prevents umbrella during later stage slip casting from buckleing and is difficult to automatically release；Depending on slip casting
Pipe and boring bore matching relationship, the rigidity length of falling pawl buckled by design salient angle umbrella, it is ensured that after the pawl that falls is released voluntarily, strutted, with hole wall
Between there is enough anti-sliding resistings；
4), after salient angle umbrella is buckled and installed, in Grouting Pipe is filled in hole until predetermined sealed borehole length position, then at its tail
Portion packs into smooth umbrella respectively and buckles and with the conical pipe famale connector of swivel nut, and is buckled by smooth umbrella and push aperture 0.2～0.5m distance；
5) the conical pipe male contact with check valve and external thread structure is wedged soft plasticity Grouting Pipe afterbody, with conical pipe
Famale connector connects, and screws swivel nut until meeting Grouting Pipe seal request；The welding of conical pipe male contact afterbody connects famale connector, soon with band
Have and connect after slip casting is hose connection outside the hole of male contact soon, start injection hole sealing operation；
6) opening grouting pump and start injection hole sealing, after slip casting overpressure reaches certain value, Grouting Pipe front end is built-in
Salient angle umbrella is buckled and is automatically released, and pawl struts, it is achieved the automatic plugging bottom sealing of hole section, continues thereafter with injection hole sealing, until predetermined
Grouting pressure, completes the sealing of hole operation with pressure of boring；
7), after injection hole sealing, pull up with connecing slip casting flexible pipe outside the hole of male contact, slurry pressure automatic sealing package in hole soon
Depositing, after grout cures in hole, dismantle biconial pipe joint arrangement, circulation re-uses.
As preferably, described step 5) in mesopore water filling, aerofluxus and powder charge ignite operation: for coal and rock unit section hole
The condition that reticular density is relatively big or damaged degree is higher, in coal petrography hole, water body filter loss is relatively large, should select larger aperture as far as possible
Water injection pipe carry out porous synchronous water injection work, in hole, also to install large aperture water injection pipe in advance non-explosion row if desired and enter
Row synchronizes water filling, it is ensured that coal petrography water filling total amount is higher than the filter loss of water body in hole；Otherwise, should suitably reduce the aperture of waterflood-transmission line
With water injection pipe bar number.In drilling in coal and rock the injecting process, when exhaustor has constant stream to go out, close exhaustor stop valve, water filling
Pipe continues water filling supercharging, and in hole before explosive initiation, in hole, water-filling medium is always maintained at band pressure condition.
Discharge space on a large scale, explosion high energy efficiency, the efficient uniform posting of water and crosslinking of based on plane crosslinking boring
The overall injection hole sealing of hole pattern sealing of hole section and reinforcement support action, in hole after explosive initiation, define " crosslinking hole in coal and rock
Net injection hole sealing reinforcement support circle-crosslinking hole pattern unloading pressure by blasting circle-stress of primary rock circle ", meet in coal petrography support theory " strong-
Weak-strong " Reasonable Support structural requirement.Meanwhile, for avoiding the unstability of country rock near region coal and rock that production is impacted, manually set up
Or the country rock anchor/net/canopy supporting construction after optimization explosion, form the anchor/net/canopy strengthening supporting circle of little scope, improve further
The stability of country rock.
Beneficial effects of the present invention:
1. drilling in coal and rock uses plane crosslinking cellular structure, effectively increases the boring crosslinking in country rock unit section through
Degree, the abundant release for the heavily stressed coal petrography in deep provides bigger discharge space.
2. use water-filling pressure-bearing Relieving Shot in hole, carry out spaced loading unloading pressure by blasting by crosslinking cellular structure,
Make full use of the infiltration of artesian water, efficient uniform posting performance, improve blasting energy sphere of action, it is achieved that set powder charge bar
Country rock under the part purpose of space release on a large scale, in hole, powder charge blasting energy effective rate of utilization significantly improves.
3. use crosslinking cellular structure to carry out water-filling pressure-bearing unloading pressure by blasting in hole, reduce explosive charge high-energy to single hole
Concentration action intensity, effectively reduce the punching probability of sealing material, and beneficially the stablizing of country rock near region coal and rock.
4. the crosslinking hole pattern of pair drilling and sealing section carries out injection hole sealing, defines sealing material crosslinking solidification after grout cures
Body, its overall resistance to deformation and non-skid property significantly improve, thus effectively reduce the punching risk of sealing material.
5. the sealing of hole crosslinked in injection hole sealing section crosslinking cellular structure improves the integrated carrying of country rock near region coal and rock
Performance, the existence of injection hole sealing section is equivalent to carry out this country rock region changing of reinforcement supporting, beneficially Surrounding Rock Control effect
Kind.
The most manually setting up or optimize the country rock anchor/net/canopy supporting construction after explosion, the anchor/net/canopy defining little scope adds
Strong supporting circle, " the crosslinking hole pattern injection hole sealing formed in conjunction with the unloading pressure by blasting under plane crosslinking borehole conditions and sealing of hole operation
Reinforcement support circle-crosslinking hole pattern unloading pressure by blasting circle-stress of primary rock circle ", successfully construct characteristic under these technical conditions " strong-weak-
Supporting structure system by force ".
Accompanying drawing explanation
Fig. 1 is that the crosslinking cellular structure in country rock is arranged and powder charge and sealing of hole plane graph in hole.
Fig. 2 is water-filling pressure-bearing unloading pressure by blasting effect and supporting construction profile thereof in country rock crosslinking hole pattern.
In figure: 1-Relieving way, 2-blasting boreholes, 3-drilling and sealing section, upper group of plane crosslinking boring of 4-, organize plane under 5-
Crosslinking boring, the 6-spacing of wells, powder charge in 7-hole, 8-water injection pipe, 9-exhaustor, the non-blasting boreholes of 10-, 11-primacord, 12-
Blast area, 13-Fei Bao district, 14-salient angle umbrella buckles, 15-rapid hole sealing device, 16-strengthening supporting circle, 17-reinforcement support circle, 18-
Unloading pressure by blasting circle, 19-stress of primary rock circle, the stress distribution before 20-release, the stress distribution after 21-release, 22-coal petrography is exploited
Layer.
Detailed description of the invention
As a example by plane crosslinking hole pattern water-filling pressure-bearing unloading pressure by blasting in roadway surrounding rock, in conjunction with accompanying drawing, the present invention is made into one
Step describes:
As illustrated in fig. 1 and 2, it is assumed that Relieving way 1 country rock pre-blasting boreholes 2 degree of depth is 25m, and bore diameter is 100mm, if
The meter a length of 15m of drilling and sealing section 3, and arrange upper group plane crosslinking boring 4 and lower group of plane crosslinking boring 5, and drillhole blasting
Section plane layer spacing is maintained at 2～about 3m, and in same plane, identical row is also configured as 2～3m to the spacing of wells 6.
Use water-filling pressure-bearing unloading pressure by blasting method in hole, to tendency work surface row to boring carry out powder charge 7 in advance, and fill
If water injection pipe 8 (length 25m, external diameter 10mm, internal diameter 6mm) and exhaustor 9 (length 30m, external diameter 10mm, internal diameter 6mm).For upper
Face upward boring, in advance exhaustor 9 is inserted at blasting boreholes 2 end, and according to coal and rock leak-off feature, in determining non-blasting boreholes 10 be
No carrying out synchronizes water filling, aerofluxus operation, it is assumed that the Coal-body Structure in this case is relatively complete, and the filter loss of water is relatively small,
Water injection pipe 8 and exhaustor 9 then only need to be installed in blasting boreholes 2；If a length of 4m is installed in powder charge 7 in hole, designated length is 21m
Primacord 11, and its one end is inserted in the waterproof hole of well in advance in powder charge 7, again carries out bagging waterproof measure, fill in
In pre-blasting boreholes 2, use flexible tubing (length 20m, external diameter 60mm, internal diameter 40mm) that explosive is delivered to pre-determined bit in hole
Put；After powder stick waterproof for the concluding volume in blast hole binding water injection pipe 8, send into blast hole according to identical loading method
In.
In coal and rock blast area 12 with the boring of boundary, Fei Bao district 13, install salient angle umbrella buckle 14 closure isolation two country rock districts
Territory, then uses special soft plasticity rapid hole sealing device 15 that blast area 12 boring is carried out porous synchronous injection hole sealing operation.
For ease of intubating operation, in present case, selected Grouting Pipe bore is 50mm, a length of 18m.After grout cures in hole, it is right to start
Blast hole 2 water filling, aerofluxus operation, when exhaustor 9 has constant stream to go out, close the stop valve of exhaustor 9, and water injection pipe 8 continues
Water filling supercharging, simultaneously binding primacord 11 and detonator, after personnel remove safety place, ignite powder charge 7 in hole.
After unloading pressure by blasting operation completes, labor cleaning's country rock blasting environment, and set up or optimize the country rock anchor after explosion/
Net/canopy supporting construction, forms the anchor/net/canopy strengthening supporting circle 16 of little scope, unloads in conjunction with the explosion under plane crosslinking borehole conditions
What pressure and sealing of hole operation were formed " cross-links hole pattern injection hole sealing reinforcement support circle 17-crosslinking hole pattern unloading pressure by blasting circle 18-protolith to answer
Power circle 19 ", successfully build characteristic " strong-weak-strong " supporting structure system under the conditions of Novel explosion unloading technology.
It should be pointed out that, for those skilled in the art, under the premise without departing from the principles of the invention,
Can also make some improvements and modifications, these improvements and modifications also should be regarded as protection scope of the present invention.In the present embodiment not
Clear and definite each ingredient all can use prior art to be realized.
Claims (5)
1. water-filling pressure-bearing unloading pressure by blasting based on drilling in coal and rock plane crosslinking cellular structure and a supporting reinforcement, its feature
It is: specifically include following steps:
1) for specific coal petrography occurrence condition, specify discharge space scope, design plane crosslinking drilling parameter, determine hole depth,
Pitch of holes, incline/elevation angle degree and release aperture parameters；
2), after destressing borehole parameter determination, high-power rig is used to carry out order drilling operation；During drilling, strictly control to bore
Machine is drilled precision so that the cellular structure after molding is cross-linked with each other, in the range of being in same plane；
3) after plane cellular structure is formed, to same row to blast hole clean in advance, in cleaning hole, remaining coal petrography powder, then exists
Blast hole quantification powder charge, and synchronize water injection pipe and exhaustor are installed；Use primacord to ignite explosive in hole, by primacord in conjunction with
Water injection pipe and exhaustor arrange outside fairlead along hole wall；
4) in the boring corresponding with position, boundary, Fei Bao district of blast area, install salient angle umbrella in advance to buckle, prevent blast area bored grouting envelope
In the operation process of hole, sealing of hole section serosity is to Fei Bao district crosslinking hole pattern diffusion；Using the quick injection hole sealing device of soft plasticity, porous is same
Walk row same to blast area coal petrography to sealing of hole section carry out quick injection hole sealing operation, the hole sealing device installing degree of depth is consistent；
5), after sealing of hole section grout cures, porous synchronous water filling, aerofluxus operation are started；When there being current persistently to flow out in exhaustor,
Closing exhaustor stop valve, water injection pipe continues water filling supercharging, binds primacord and detonator simultaneously and carries out big gun line connection line operation,
After personnel remove safety place, explosive in detonating primer and hole；
6) in coal and rock, in hole after explosive initiation, define " crosslinking hole pattern injection hole sealing reinforcement support circle-crosslinking hole pattern explosion
Unload trim ring-stress of primary rock circle "；For avoiding the unstability of country rock near region coal and rock that production is impacted, also need manually to set up or excellent
Change the country rock anchor/net/canopy supporting construction after explosion, form the anchor/net/canopy strengthening supporting circle of little scope, improve surrounding rock stability.
Water-filling pressure-bearing unloading pressure by blasting based on drilling in coal and rock plane crosslinking cellular structure the most according to claim 1 and supporting
Reinforcement, it is characterised in that: described step 1) borehole blasting destressing borehole parameter arrange, the boring aperture selected be 60～
100mm, the 40%～60% of crosslinking drilling and sealing a length of boring total length.
Water-filling pressure-bearing unloading pressure by blasting based on drilling in coal and rock plane crosslinking cellular structure the most according to claim 1 and supporting
Reinforcement, it is characterised in that: described step 3) in borehole charge and pipeline arrange operation, the coal petrography for tendency of facing upward bores
Hole, the water injection pipe installing degree of depth in blast hole exceedes sealing of hole section 0.1～0.3m, and exhaustor then needs to be installed up to position at the bottom of hole；Right
In the boring of nutation tendency, water injection pipe need to be installed up at the bottom of hole, and exhaustor is exceeded drilling and sealing section 0.1～0.3m.
Water-filling pressure-bearing unloading pressure by blasting based on drilling in coal and rock plane crosslinking cellular structure the most according to claim 1 and supporting
Reinforcement, it is characterised in that: described step 4) described in soft plasticity rapid hole sealing device, including the umbrella for drilling and sealing section
Button-type plugging device, Grouting Pipe and biconial pipe joint arrangement；
Described umbrella button-type plugging device includes that salient angle umbrella is buckled and smooth umbrella is buckled, on the rigidity that salient angle umbrella is buckled pawl the most curved set convex
Angle, base buckled by salient angle umbrella is cylindrical metal base, and its diameter is less than Grouting Pipe internal diameter, and base edge is polished into light in advance and slips
Angle；Smooth umbrella is buckled, and for falling the ring buckle of pawl with conventional rigid, ring buckle internal diameter is more than Grouting Pipe external diameter, and its external diameter is less than boring
Bore dia, salient angle umbrella is buckled and smooth umbrella is buckled down and connected into umbrella by soft plasticity lamellar ductile material between pawl；
Described Grouting Pipe is soft plasticity Grouting Pipe of cracking；
Described biconial pipe joint arrangement includes conical pipe male contact and conical pipe famale connector, wherein conical pipe famale connector peripheral hardware spiral shell
Set, there is gasket seal swivel nut and conical pipe famale connector junction；Conical pipe male contact end with check valve and external screw thread device,
The welding of conical pipe male contact afterbody connects famale connector soon, connects famale connector soon hose connection with slip casting by connecing male contact soon；
A kind of quick slip-casting hole-sealing method of soft plasticity using said apparatus, comprises the following steps:
1) first, according to drilling in coal and rock purposes, the hole base space beyond drilling and sealing section arranges pipeline or powder charge in advance, and will
Pipeline is drawn along hole wall country rock；
2) according to boring bore, sealing of hole segment length requirement, the soft plasticity Grouting Pipe of selection, cut respective type, length and bore,
Selected Grouting Pipe bore is the 40%～60% of boring bore, and passes in and out uninterrupted according to Grouting Pipe, and design Grouting Pipe is cracked
Bar number, cracking length and width, do not crack at the two ends of Grouting Pipe；
3) after Grouting Pipe of cracking machine-shaping, salient angle umbrella being buckled the front end being built in Grouting Pipe, umbrella is buckled salient angle setting and to be ensured just
Grouting Pipe inwall is not touched at the tip of property pawl, prevents umbrella during later stage slip casting from buckleing and is difficult to automatically release；Depending on Grouting Pipe with
Boring bore matching relationship, the rigidity length of falling pawl buckled by design salient angle umbrella, it is ensured that after the pawl that falls is released voluntarily, strutted, and has between hole wall
There are enough anti-sliding resistings；
4), after salient angle umbrella is buckled and installed, in Grouting Pipe is filled in hole until predetermined sealed borehole length position, then in its portion
Do not pack into smooth umbrella to buckle and with the conical pipe famale connector of swivel nut, and smooth umbrella is buckled push aperture 0.2～0.5m distance；
5) the conical pipe male contact with check valve and external thread structure is wedged soft plasticity Grouting Pipe afterbody, connect with conical pipe the moon
Head connects, and screws swivel nut until meeting Grouting Pipe seal request；The welding of conical pipe male contact afterbody connects famale connector, soon and with soon
Connect after slip casting is hose connection outside the hole of male contact, start injection hole sealing operation；
6) open grouting pump and start injection hole sealing, after slip casting overpressure reaches certain value, the salient angle that Grouting Pipe front end is built-in
Umbrella is buckled and is automatically released, and pawl struts, it is achieved the automatic plugging bottom sealing of hole section, continues thereafter with injection hole sealing, until predetermined slip casting
Pressure, completes the sealing of hole operation with pressure of boring；
7) after injection hole sealing, pulling up with connecing slip casting flexible pipe outside the hole of male contact soon, in hole, slurry pressure automatic sealing package is deposited, and treats
In hole after grout cures, dismantling biconial pipe joint arrangement, circulation re-uses.
Water-filling pressure-bearing unloading pressure by blasting based on drilling in coal and rock plane crosslinking cellular structure the most according to claim 1 and supporting
Reinforcement, it is characterised in that: described step 5) water filling in mesopore, aerofluxus and powder charge ignite operation, cut for coal and rock unit
The condition that face reticular density is relatively big or damaged degree is higher, in coal petrography hole, water body filter loss is relatively large, should select larger aperture
Water injection pipe carry out porous synchronous water injection work, in hole, also to install large aperture water injection pipe in advance non-explosion row if desired and enter
Row synchronizes water filling, it is ensured that coal petrography water filling total amount is higher than the filter loss of water body in hole；Otherwise, aperture and the note of waterflood-transmission line should be reduced
Water pipe bar number.
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| CN201610440600.9A CN106121644B (en) | 2016-06-17 | 2016-06-17 | The water-filling pressure-bearing unloading pressure by blasting of cellular structure and supporting reinforcement are crosslinked based on drilling in coal and rock plane |
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| CN107044271A (en) * | 2017-04-17 | 2017-08-15 | 中国矿业大学 | A kind of blanket net pitching slip-casting hole-sealing method |
| CN108253849A (en) * | 2018-03-16 | 2018-07-06 | 中国矿业大学 | Coal petrography explosion pre-splitting method and device based on liquid explosives envelope note detonation in deep hole |
| CN112883699A (en) * | 2019-11-29 | 2021-06-01 | 核工业二一六大队 | Uranium mine geological drilling and sealing design and sealing registration table digital manufacturing method |
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| CN106121644B (en) | 2018-05-29 |
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