CN106121644B - 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 - Google Patents

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 Download PDF

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Publication number
CN106121644B
CN106121644B CN201610440600.9A CN201610440600A CN106121644B CN 106121644 B CN106121644 B CN 106121644B CN 201610440600 A CN201610440600 A CN 201610440600A CN 106121644 B CN106121644 B CN 106121644B
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hole
drilling
sealing
pipe
coal
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CN106121644A (en
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杨敬轩
刘长友
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China University of Mining and Technology CUMT
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China University of Mining and Technology CUMT
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    • EFIXED CONSTRUCTIONS
    • E21EARTH DRILLING; MINING
    • E21CMINING OR QUARRYING
    • E21C41/00Methods of underground or surface mining; Layouts therefor
    • E21C41/16Methods of underground mining; Layouts therefor
    • E21C41/18Methods of underground mining; Layouts therefor for brown or hard coal
    • EFIXED CONSTRUCTIONS
    • E21EARTH DRILLING; MINING
    • E21BEARTH DRILLING, e.g. DEEP DRILLING; OBTAINING OIL, GAS, WATER, SOLUBLE OR MELTABLE MATERIALS OR A SLURRY OF MINERALS FROM WELLS
    • E21B33/00Sealing or packing boreholes or wells
    • E21B33/10Sealing or packing boreholes or wells in the borehole
    • E21B33/13Methods or devices for cementing, for plugging holes, crevices, or the like
    • EFIXED CONSTRUCTIONS
    • E21EARTH DRILLING; MINING
    • E21BEARTH DRILLING, e.g. DEEP DRILLING; OBTAINING OIL, GAS, WATER, SOLUBLE OR MELTABLE MATERIALS OR A SLURRY OF MINERALS FROM WELLS
    • E21B7/00Special methods or apparatus for drilling
    • EFIXED CONSTRUCTIONS
    • E21EARTH DRILLING; MINING
    • E21DSHAFTS; TUNNELS; GALLERIES; LARGE UNDERGROUND CHAMBERS
    • E21D11/00Lining tunnels, galleries or other underground cavities, e.g. large underground chambers; Linings therefor; Making such linings in situ, e.g. by assembling
    • E21D11/006Lining anchored in the rock
    • FMECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F42AMMUNITION; BLASTING
    • F42DBLASTING
    • F42D1/00Blasting methods or apparatus, e.g. loading or tamping
    • FMECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F42AMMUNITION; BLASTING
    • F42DBLASTING
    • F42D3/00Particular applications of blasting techniques
    • F42D3/04Particular applications of blasting techniques for rock blasting

Abstract

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 the invention discloses a kind of, by setting crosslinking drilling in coal petrography, on the one hand the in vivo discharge space of coal petrography is effectively increased, on the other hand by using the method for water-filling pressure-bearing unloading pressure by blasting in hole, the efficient uniform posting characteristic of water is taken full advantage of, expands the release range of disturbance of crosslinking drilling in coal body.The crosslinking drilling extensively cross-linked perforation of discharge space, forms whole unloading pressure by blasting circle, release significant effect." 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 this method, meet " strong and weak strong " support idea in coal petrography support theory, and effectively overcome the problems such as the strong motion in drilling under conventional charge blasting condition, more spray orifices, difficult supporting.

Description

Water-filling pressure-bearing unloading pressure by blasting and supporting based on drilling in coal and rock plane crosslinking cellular structure Reinforcement
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 to mend Strong method, the stabilization available for the high stress transfer of deep coal petrography, the exploitation of high stress coal seam pressure relief and raising surrounding rock structure etc. Field.
Background technology
With the background of current coal intensive high intensity production, the superficial part resource that can cut coal gradually tends to be exhausted, deep The exploitation of portion's coal petrography resource utilizes the mainstream for just becoming current coal production.With the increase of coal mining depth, coal seam is high should Power occurrence condition seriously constrains the safe and efficient production in colliery.For example, 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 lane side coal and rock rock burst 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 low output, the strong ore deposit voltage-frequency of working face is numerous, Gao Ying Top plate induction type impulsion pressure more serious threat under the conditions of power the safety in production of mine.Therefore, Deep Mine coal petrography is liberated High stress environment realizes heavily stressed effective release transfer in the coal and rock of deep, is current deep fractures safety and high efficiency Important leverage, and efficient coal petrography high stress release transfer techniques are researched and developed as this key is solved the problems, such as.
At present, the coal petrography high stress release transfer techniques of mainstream mainly include drilling release, hydraulic fracture, standing with And corresponding deriving technology etc..Wherein, release is drilled mainly by being drilled with the drilling in coal and rock of large aperture, and it is empty to provide larger release Between, realize the heavily stressed release transfer of coal and rock, but relief range is small, and effect is sluggish, needs the longer release cycle that can take effect, And intensive large aperture destressing borehole is set, it adds drilling and is drilled with cost;Hydraulic fracture is then mainly be subject to sealing of hole problem system About, technical costs is relatively high, and three-dimensional high-stress state is in inside the deep hole under high stress environment, and coal petrography fracturing pressure is strong Degree requirement is high, more proposes high requirement to hydraulic fracture equipment and sealing of hole equipment, the filter of deep hole long range coal petrography fracturing section in addition Losing influences, and reduces high-pressure hydraulic fracturing effect indirectly;For the standing release under the conditions of conventional charge in drilling, again There are physics unloading pressure by blasting and point of chemical charge explosion release, but no matter which kind of unloading pressure by blasting mode, basic principle is all Utilize the high-effect effective high stress transfer for expanding drilling discharge space, realizing in the range of coal and rock blast disturbance of explosion, release Effect is relatively notable, but the technology is high there are blasting energy, and drilling and sealing is difficult, and the easy punching of sealing material protrudes, and is formed larger Country rock explosive funnel, coal production and surrounding rock supporting etc. are impacted.
To sum up analyze, it is provided by the invention based on drilling in coal and rock plane crosslinking cellular structure water-filling pressure-bearing unloading pressure by blasting and Supporting reinforcement is effectively improved by the infiltration of artesian water, efficient uniform posting and the effect of static pressure broken rock in country rock hole Coal petrography unloading pressure by blasting and surrounding rock supporting the effect, " 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 meets " strong-weak-strong " support idea in coal petrography support theory, The problems such as strong motion, more spray orifices and the difficult supporting in drilling under conventional charge blasting condition are effectively overcome, there is extensive skill Art promotion and application are worth.
The content of the invention
The present invention is provided for Deep Mine high stress environmental effect based on drilling in coal and rock plane crosslinking cellular structure Water-filling pressure-bearing unloading pressure by blasting and supporting reinforcement, the crosslinking perforation that this method is drilled based on plane, have given full play to crosslinking hole The infiltration of pressure-bearing aqueous medium, efficient uniform posting and the effect of static pressure broken rock, form the characteristic under the technical conditions in net " strong-weak-strong " supporting structure system.
The technical solution adopted by 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 drilling lay, in hole powder charge and pipeline arrangement, quick injection hole sealing with And process is ignited in water filling, exhaust and powder charge in hole, specifically includes following steps:
1) for specific coal petrography occurrence condition, discharge space scope is specified, design plane drilling parameter determines reasonable hole Depth, the pitch of holes ,/parameters such as elevation angle degree and release aperture of inclining.
2) after destressing borehole parameter determines, using high-power drilling machine carry out order drilling operation.It is stringent to control during drilling Drilling machine processed is drilled precision so that and the cellular structure after shaping is cross-linked with each other, and in the range of 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 Afterwards in blast hole quantification powder charge, and water injection pipe and exhaust pipe are synchronously installed.Explosive in hole is ignited using primacord, by primacord It is arranged in conjunction with water injection pipe and exhaust pipe along hole wall outside fairlead.
4) salient angle umbrella is installed in advance in blast area and the correspondence drilling of Fei Bao areas boundary position to buckle, prevent blast area drilling note Sealing of hole sections slurries in sealing of hole operation process are starched to spread to Fei Bao areas crosslinking hole pattern.Using the dedicated soft quick injection hole sealing dress of plasticity Put, porous synchronous to the same row of blast area coal petrography to sealing of hole sections carry out quick injection hole sealing operation, hole sealing device installing depth Unanimously.
5) after sealing of hole sections grout cures, porous synchronous water filling, exhaust operation are started.It is persistently flowed out when there is current in exhaust pipe When, exhaust pipe shut-off valve is closed, water injection pipe continues water filling supercharging, while binds primacord and detonator and carry out big gun line line work Industry, after personnel remove safety place, explosive in detonating primer and hole.
6) " crosslinking hole pattern injection hole sealing reinforcement support circle-crosslinking hole pattern in hole after explosive initiation, is formd in coal and rock Unloading pressure by blasting circle-stress of primary rock circle ".Unstability to avoid country rock near region coal and rock impacts production, also needs manually to add Or country rock anchor/net/canopy supporting construction after optimization explosion, small-scale anchor/net/canopy strengthening supporting circle is formed, it is steady to improve country rock It is qualitative.
Preferably, step 1) the borehole blasting destressing borehole parameter setting:Selected drilling should be advisable with large aperture, Generally in 60~100mm or so, sufficient discharge space on the one hand is provided for coal and rock, is on the other hand then conducive to the dress in later stage Medicine and sealing of hole operation penetrate through also advantageously for the crosslinking for realizing same plane drilling;Efficient posting performance based on water with And to meet the stabilization of country rock near region coal and rock and reinforcement supporting requirement, crosslinking drilling and sealing length is generally the total length that drills 40%~60% is advisable;For the spacing of wells and hole depth mainly depending on coal petrography intensity and stress of primary rock condition, for hard coal Rock, which should try one's best, follows short-bore depth, small spacing principle, it is ensured that with higher hole pattern crosslinking perforation degree in coal and rock unit section, carries The abundant release of high explosion high energy efficiency and the efficient posting of aqueous medium to hard coal petrography then should be increased suitably vice versa for soft coal petrography Hole depth and pitch of holes.
It is more demanding for coal petrography plane drilling craft precision of drilling.During drilling, shifting setting parameter, brill for drilling machine Bar is azimuthal to adjust the initial position parameter setting etc. that sets and drill to be intended to meet certain required precision, so that it is guaranteed that after shaping Drilling is cross-linked with each other, in same plane scope.If plane space layer position difference farther out, needs debugging to drill where shaping drilling Parameter is punched again.
Preferably, borehole charge arranges process with pipeline in the step 3):For general drilling in coal and rock, set The drilling for tendency of facing upward is beneficial to row's fortune of coal petrography powder during drilling and the borehole cleaning operation in later stage, at this time the note in blast hole Water pipe installing depth only requires more than 0.1~0.3m of sealing of hole sections, and exhaust pipe then needs to be installed up to bottom hole position;For nutation tendency Drilling need to then be cleared coal petrography powder remaining in hole, need water injection pipe being installed up to hole at this time by corresponding auxiliary borehole cleaning facility Bottom, and be more than 0.1~0.3m of drilling and sealing section by exhaust pipe.Meanwhile explosive in hole is ignited using primacord, primacord need to be joined It is arranged respectively along hole wall outside fairlead with water injection pipe and exhaust pipe.
Preferably, step 4) the borehole blasting area injection hole sealing process:Special salient angle umbrella need to be installed in advance to buckle, it will be quick-fried Broken area and Fei Bao areas drilling and sealing section are mutually isolated, for the same row in blast area to drilling carry out injection hole sealing operation and need to use Dedicated soft plasticity rapid hole sealing device, umbrella button-type plugging device, Grouting Pipe and biconial pipe including being used for drilling and sealing section Piecing devices;
The umbrella button-type plugging device is buckled including salient angle umbrella and smooth umbrella is buckled, and the rigidity that salient angle umbrella is buckled falls curved in advance on pawl set Salient angle, salient angle umbrella buckle pedestal as cylindrical metal pedestal, and diameter is less than slip casting bore, and base edge is polished into smooth in advance Chamfering;Smooth umbrella is buckled, and is to fall the ring buckle of pawl with conventional rigid, and ring buckle internal diameter is more than slip casting pipe outside diameter, and outer diameter is less than Bore diameter, salient angle umbrella is buckled and smooth umbrella is buckled down and connects into umbrella by soft plasticity sheet ductile material between pawl;
The Grouting Pipe is soft plasticity Grouting Pipe of cracking;
The biconial pipe joint arrangement includes conical pipe male contact and conical pipe famale connector, wherein outside conical pipe famale connector If swivel nut, swivel nut has gasket seal with conical pipe famale connector junction;Conical pipe male contact end carries check valve and external screw thread Device, the welding of conical pipe male contact afterbody connect famale connector, connect famale connector soon and be connected by connecing male contact soon with slip casting hose soon;
A kind of quick slip-casting hole-sealing method of soft plasticity using above device comprises the following steps:
1) first, according to drilling in coal and rock purposes, pipeline or powder charge are arranged in the bottom hole space beyond drilling and sealing section in advance, And pipeline is drawn along hole wall country rock;
2) according to drilling bore, sealing of hole sections 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 drilling bore, and passes in and out uninterrupted according to Grouting Pipe, designs Grouting Pipe Crack item number, cracking length and width, does not crack at the both ends of Grouting Pipe;
3) after Grouting Pipe of cracking machine-shaping, salient angle umbrella is buckled to the front end for being built in Grouting Pipe, umbrella is buckled salient angle setting and to be protected Card rigidity, which falls the tip of pawl, not touch Grouting Pipe inner wall, prevent during later stage slip casting that umbrella is buckled and be difficult to release automatically;Depending on slip casting Pipe and drilling bore matching relationship, design salient angle umbrella buckle the rigidity length of falling pawl, after ensureing that pawl is voluntarily released, strutted, with hole wall Between have enough anti-sliding resistings;
4) salient angle umbrella is buckled install after, Grouting Pipe is filled in hole until predetermined sealed borehole length position, then in its tail Portion packs into smooth umbrella and buckles and the conical pipe famale connector with swivel nut respectively, and smooth umbrella is buckled push-in aperture 0.2~0.5m distances;
5) soft plasticity Grouting Pipe afterbody will be wedged with the conical pipe male contact of check valve and external thread structure, 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 outside the hole for connecing male contact soon after the connection of slip casting hose, beginning injection hole sealing operation;
6) open grouting pump and start injection hole sealing, after slip casting overpressure reaches certain value, built in Grouting Pipe front end Salient angle umbrella is buckled to be released automatically, and the pawl that falls struts, and realizes the automatic plugging of sealing of hole sections bottom, continues thereafter with injection hole sealing, until predetermined Grouting pressure completes the sealing of hole operation with pressure of drilling;
7) after injection hole sealing, pull up with connecing slip casting hose outside the hole of male contact soon, slurry pressure automatic sealing package in hole It deposits, after grout cures in hole, dismantles biconial pipe joint arrangement, cycling reuses.
Preferably, process is ignited in water filling, exhaust and powder charge in the step 5) mesoporous:For coal and rock unit section hole The condition that reticular density is larger or damaged degree is higher, water body filter loss is relatively large in coal petrography hole, and should try one's best selection larger aperture Water injection pipe carry out porous synchronous water injection work, if necessary non-explosion arrange also to be installed in advance into hole large aperture water injection pipe into Row synchronization water filling, ensures filter loss of the coal petrography water filling total amount higher than water body in hole;Conversely, it should suitably reduce the aperture of waterflood-transmission line With water injection pipe item number.In drilling in coal and rock the injecting process, when exhaust pipe has constant stream to go out, exhaust pipe shut-off valve, water filling are closed Pipe continues water filling supercharging, and in hole before explosive initiation, water-filling medium is always maintained at band pressure condition in hole.
A wide range of discharge space, explosion high energy efficiency, the efficient uniform posting of water and crosslinking based on plane crosslinking drilling The whole injection hole sealing of hole pattern sealing of hole sections and reinforcement support action in hole after explosive initiation, form " 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 " it is strong- It is weak-strong " Reasonable Support structural requirement.Meanwhile it for the unstability of country rock near region coal and rock is avoided to impact production, manually adds Or country rock anchor/net/canopy supporting construction after optimization explosion, small-scale anchor/net/canopy strengthening supporting circle is formed, is further improved The stability of country rock.
Beneficial effects of the present invention:
1. drilling in coal and rock is crosslinked cellular structure using plane, the drilling crosslinking perforation in country rock unit section is effectively increased Degree, the abundant release for deep high stress coal petrography provide larger discharge space.
2. using water-filling pressure-bearing Relieving Shot in hole, spaced loading unloading pressure by blasting is carried out by being crosslinked cellular structure, Infiltration, the efficient uniform posting performance of artesian water are made full use of, blasting energy sphere of action is improved, realizes set powder charge item The a wide range of space release purpose of country rock under part, powder charge blasting energy effective rate of utilization significantly improves in hole.
3. carrying out water-filling pressure-bearing unloading pressure by blasting in hole using crosslinking cellular structure, explosive charge high-energy is reduced to single hole Concentration action intensity, effectively reduce the punching possibility of sealing material, and be conducive to the stabilization of country rock near region coal and rock.
4. the crosslinking hole pattern of pair drilling and sealing section carries out injection hole sealing, sealing material crosslinking solidification is formd after grout cures Body, whole resistance to deformation and non-skid property significantly improve, so as to 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 presence of injection hole sealing section is equivalent to has carried out reinforcement supporting to the country rock region, is conducive to changing for Surrounding Rock Control effect It is kind.
6. manually adding or optimizing the anchor of the country rock after explosion/net/canopy supporting construction, form small-scale anchor/net/canopy and add Strong supporting circle, " the crosslinking hole pattern injection hole sealing that the unloading pressure by blasting and sealing of hole operation being crosslinked in conjunction with plane under borehole conditions are formed Reinforcement support circle-crosslinking hole pattern unloading pressure by blasting circle-stress of primary rock circle ", successfully construct under the technical conditions characteristic " it is strong-weak- Supporting structure system by force ".
Description of the drawings
Fig. 1 be in country rock crosslinking cellular structure arrangement and hole in powder charge and sealing of hole plan view.
Fig. 2 is water-filling pressure-bearing unloading pressure by blasting effect and its supporting construction sectional view in country rock crosslinking hole pattern.
In figure:1- Relieving ways, 2- blasting boreholes, 3- drilling and sealing sections organize plane crosslinking drilling, 5- the following group planes on 4- Crosslinking drills, the 6- spacings of wells, powder charge in 7- holes, 8- water injection pipes, 9- exhaust pipes, the non-blasting boreholes of 10-, 11- primacords, 12- Blast area, 13- Fei Bao areas, 14- salient angle umbrellas are buckled, 15- rapid hole sealing devices, 16- strengthening supporting circles, 17- reinforcement support circles, 18- Unloading pressure by blasting circle, 19- stress of primary rock circles, the stress distribution before 20- releases, the stress distribution after 21- releases, the exploitation of 22- coal petrographys Layer.
Specific embodiment
By taking the plane crosslinking hole pattern water-filling pressure-bearing unloading pressure by blasting in roadway surrounding rock as an example, the present invention is made into one with reference to attached drawing Step description:
As illustrated in fig. 1 and 2, it is assumed that pre- 2 depth of blasting boreholes of 1 country rock of Relieving way be 25m, bore diameter 100mm, if It is 15m to count 3 length of drilling and sealing section, and arranges and organize plane crosslinking drilling 4 and the following group plane crosslinking drilling 5, and drillhole blasting Section plane interlamellar spacing is maintained at 2~3m or so, and identical row is also configured as 2~3m to the spacing of wells 6 in same plane.
Using water-filling pressure-bearing unloading pressure by blasting method in hole, tendency working face is arranged to drilling carry out advance powder charge 7, and fill If water injection pipe 8 (length 25m, outer diameter 10mm, internal diameter 6mm) and exhaust pipe 9 (length 30m, outer diameter 10mm, internal diameter 6mm).For upper Face upward drilling, exhaust pipe 9 be inserted into 2 bottom of blasting boreholes in advance, and according to coal and rock leak-off feature, determine be in non-blasting boreholes 10 It is no to synchronize water filling, exhaust operation, it is assumed that the Coal-body Structure in the case is relatively complete, and the filter loss of water is relatively small, Water injection pipe 8 and exhaust pipe 9 then need to be only installed in blasting boreholes 2;It is 4m, designated length 21m that if length is installed in powder charge 7 in hole Primacord 11, and in the hole of its one end insertion well in advance waterproof in powder charge 7, bagging waterproof measure will be carried out again, filled in In pre- blasting boreholes 2, explosive is sent to being pre-positioned in hole using flexible tubing (length 20m, outer diameter 60mm, internal diameter 40mm) It puts;After the concluding volume waterproof powder stick binding water injection pipe 8 in blast hole, blast hole is sent into according to identical loading method It is interior.
Salient angle umbrella is installed in the drilling having a common boundary in coal and rock blast area 12 with Fei Bao areas 13 and buckles 14 and blocks and isolates two country rock areas Then domain drills to blast area 12 using dedicated soft plasticity rapid hole sealing device 15 and carries out porous synchronous injection hole sealing operation. For ease of being intubated operation, it is 50mm, length 18m that Grouting Pipe bore is selected in present case.After grout cures in hole, start pair 2 water filling of blast hole, exhaust operation, when exhaust pipe 9 has constant stream to go out, close the shut-off valve of exhaust pipe 9, water injection pipe 8 continues Water filling is pressurized, while binds primacord 11 and detonator, after personnel remove safety place, ignites powder charge 7 in hole.
After the completion of unloading pressure by blasting operation, manual cleaning country rock blasting environment, and add or optimize the country rock anchor after explosion/ Net/canopy supporting construction forms small-scale anchor/net/canopy strengthening supporting circle 16, and the explosion being crosslinked in conjunction with plane under borehole conditions is unloaded What pressure and sealing of hole operation were formed " is crosslinked hole pattern injection hole sealing reinforcement support circle 17- crosslinking hole pattern unloading pressure by blasting circle 18- protoliths to answer Power circle 19 " successfully builds 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, without departing from the principle of the present invention, Several improvements and modifications can also be made, these improvements and modifications also should be regarded as protection scope of the present invention.In the present embodiment not The available prior art of specific each component is realized.

Claims (5)

1. a kind of be crosslinked the water-filling pressure-bearing unloading pressure by blasting of cellular structure and supporting reinforcement, feature based on drilling in coal and rock plane 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 determines, using high-power drilling machine carry out order drilling operation;During drilling, stringent control is bored Machine is drilled precision so that the cellular structure after shaping is cross-linked with each other, in the range of same plane;
3) after plane cellular structure is formed, to same row to blast hole clean in advance, remaining coal petrography powder, Ran Hou in cleaning hole Blast hole quantification powder charge, and water injection pipe and exhaust pipe are synchronously installed;Using primacord ignite hole in explosive, by primacord in conjunction with Water injection pipe and exhaust pipe are arranged along hole wall outside fairlead;
4) salient angle umbrella is installed in advance in blast area and the correspondence drilling of Fei Bao areas boundary position to buckle, prevent blast area bored grouting envelope Sealing of hole sections slurries are spread to Fei Bao areas crosslinking hole pattern in the operation process of hole;Using soft plasticity rapid hole sealing device, porous synchronous pair The same row of blast area coal petrography to sealing of hole sections carry out quick injection hole sealing operation, hole sealing device installing depth is consistent;
5) after sealing of hole sections grout cures, porous synchronous water filling, exhaust operation are started;When there is current persistently to flow out in exhaust pipe, Exhaust pipe shut-off valve is closed, water injection pipe continues water filling supercharging, while binds primacord and detonator and carry out big gun line connection line operation, After personnel remove safety place, explosive in detonating primer and hole;
6) " crosslinking hole pattern injection hole sealing reinforcement support circle-crosslinking hole pattern explosion in hole after explosive initiation, is formd in coal and rock Unload trim ring-stress of primary rock circle ";Unstability to avoid country rock near region coal and rock impacts production, also needs manually to add or excellent Change country rock anchor/net/canopy supporting construction after explosion, form small-scale anchor/net/canopy strengthening supporting circle, improve surrounding rock stability.
2. water-filling pressure-bearing unloading pressure by blasting and supporting according to claim 1 based on drilling in coal and rock plane crosslinking cellular structure Reinforcement, it is characterised in that:Step 1) the borehole blasting destressing borehole parameter setting, selected boring aperture for 60~ 100mm, crosslinking drilling and sealing length are the 40%~60% of drilling total length.
3. water-filling pressure-bearing unloading pressure by blasting and supporting according to claim 1 based on drilling in coal and rock plane crosslinking cellular structure Reinforcement, it is characterised in that:Borehole charge arranges process with pipeline in the step 3), is bored for the coal petrography for tendency of facing upward Hole, the water injection pipe installing depth in blast hole is more than 0.1~0.3m of sealing of hole sections, and exhaust pipe then needs to be installed up to bottom hole position;It is right In the drilling of nutation tendency, water injection pipe need to be installed up to bottom hole, and be more than 0.1~0.3m of drilling and sealing section by exhaust pipe.
4. water-filling pressure-bearing unloading pressure by blasting and supporting according to claim 1 based on drilling in coal and rock plane crosslinking cellular structure Reinforcement, it is characterised in that:Soft plasticity rapid hole sealing device described in the step 4), the umbrella including being used for drilling and sealing section Button-type plugging device, Grouting Pipe and biconial pipe joint arrangement;
The umbrella button-type plugging device is buckled including salient angle umbrella and smooth umbrella is buckled, the rigidity that salient angle umbrella is buckled fall on pawl it is curved in advance set it is convex Angle, salient angle umbrella buckle pedestal as cylindrical metal pedestal, and diameter is less than slip casting bore, base edge be polished into advance it is smooth fall Angle;Smooth umbrella is buckled, and is to fall the ring buckle of pawl with conventional rigid, and ring buckle internal diameter is more than slip casting pipe outside diameter, and ring buckle outer diameter is small In bore diameter, salient angle umbrella is buckled and smooth umbrella is buckled down and connects into umbrella by soft plasticity sheet ductile material between pawl;
The Grouting Pipe is soft plasticity Grouting Pipe of cracking;
The biconial pipe joint arrangement includes conical pipe male contact and conical pipe famale connector, wherein conical pipe famale connector peripheral hardware spiral shell Set, swivel nut have gasket seal with conical pipe famale connector junction;Conical pipe male contact end carries check valve and external screw thread device, The welding of conical pipe male contact afterbody connects famale connector soon, connects famale connector soon and is connected by connecing male contact soon with slip casting hose;
Using the quick slip-casting hole-sealing method of soft plasticity of the soft plasticity rapid hole sealing device in the step 4), including following step Suddenly:
1) first, according to drilling in coal and rock purposes, the bottom hole space beyond drilling and sealing section arranges pipeline and in advance by pipeline edge Hole wall country rock is drawn or the advance powder charge in bottom hole space beyond drilling and sealing section;
2) according to drilling bore, sealing of hole sections length requirement, the soft plasticity Grouting Pipe of selection, cut respective type, length and bore, Selected Grouting Pipe bore is the 40%~60% of drilling bore, and passes in and out uninterrupted according to Grouting Pipe, and design Grouting Pipe is cracked Item number, cracking length and width do not crack at the both ends of Grouting Pipe;
3) after Grouting Pipe of cracking machine-shaping, salient angle umbrella is buckled to the front end for being built in Grouting Pipe, umbrella, which buckles salient angle setting, will ensure just Property, which falls the tip of pawl, not touch Grouting Pipe inner wall, prevent during later stage slip casting that umbrella is buckled and be difficult to release automatically;Depending on Grouting Pipe with Drill bore matching relationship, and design salient angle umbrella buckles the rigidity length of falling pawl, after ensureing that pawl is voluntarily released, strutted, has between hole wall There are enough anti-sliding resistings;
4) salient angle umbrella is buckled install after, Grouting Pipe is filled in hole until predetermined sealed borehole length position, then in its portion Smooth umbrella is not packed into buckle and the conical pipe famale connector with swivel nut, and smooth umbrella is buckled into push-in aperture 0.2~0.5m distances;
5) soft plasticity Grouting Pipe afterbody will be wedged with the conical pipe male contact of check valve and external thread structure, is connect with conical pipe the moon Head connection screws swivel nut until meeting Grouting Pipe seal request;The welding of conical pipe male contact afterbody connects famale connector soon, and with fast It connects outside the hole of male contact after the connection of slip casting hose, beginning injection hole sealing operation;
6) open grouting pump and start injection hole sealing, after slip casting overpressure reaches certain value, the salient angle built in Grouting Pipe front end Umbrella is buckled to be released automatically, and the pawl that falls struts, and realizes the automatic plugging of sealing of hole sections bottom, continues thereafter with injection hole sealing, until predetermined slip casting Pressure completes the sealing of hole operation with pressure of drilling;
7) after injection hole sealing, pull up with slip casting hose outside the hole of male contact is connect soon, slurry pressure automatic sealing package is deposited in hole, is treated In hole after grout cures, biconial pipe joint arrangement is dismantled, cycling reuses.
5. water-filling pressure-bearing unloading pressure by blasting and supporting according to claim 1 based on drilling in coal and rock plane crosslinking cellular structure Reinforcement, it is characterised in that:Process is ignited in water filling, exhaust and powder charge in the step 5) mesoporous, is cut for coal and rock unit The condition that face reticular density is larger or damaged degree is higher, water body filter loss is relatively large in coal petrography hole, should select larger aperture Water injection pipe carry out porous synchronous water injection work.
CN201610440600.9A 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 Active CN106121644B (en)

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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

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