CN207335553U - A kind of drilling tamponade device for drillhole blasting - Google Patents
A kind of drilling tamponade device for drillhole blasting Download PDFInfo
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- CN207335553U CN207335553U CN201720463204.8U CN201720463204U CN207335553U CN 207335553 U CN207335553 U CN 207335553U CN 201720463204 U CN201720463204 U CN 201720463204U CN 207335553 U CN207335553 U CN 207335553U
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Abstract
A kind of drilling tamponade device for drillhole blasting, including the powder column being made of the built-in swelling agent of packing tube that sponge and the brown paper for having permeable hole make；Swelling agent is by burning CaO, NaHCO3, quartz sand, clay, polymer absorbent material and absolute ethyl alcohol mixing composition；Powder column is fixed on the axial expansion constraint mechanism being made of screw and blanking cover, is enclosed in the space that the elastic protecting sleeve of heat pad and heat insulating mattress and blanking cover are formed.The device is by using NaHCO3Heat is reabsorbed with water reaction liberated heat, by heat pad by reactive absorption CaO and after-heat obstructs three technology measure by heat insulating mattress, the temperature for the boosting explosive material for making to be covered by heat insulating mattress is less than its tolerable temperature, it is ensured that detonation train safe operation is without miss-fire accident；Axial expansion is limited in swelling agent reaction process, is developed to radial direction, makes to be radially expanded pressure raising, and powder column fully makes up with drill hole inner wall, clogs quality and effect improves.
Description
Technical field
The utility model is related to rock blasting, particularly a kind of drillhole blasting excavate drilling tamponade device that rock uses and
Its preparation method.
Background technology
Drillhole blasting abbreviation drilling and blasting method, is to pass throughDrillingThe method for carrying out explosion to rock with powder charge, is that current excavate is broken
The main means of detritus body.According to statistics, in surface mine production, mine fragmentation leans on drilling and blasting method；In underground, Hard rock mine is dug
Into with exploitation, drilling and blasting method accounts for more than 90%；In tunnel and water conservancy project construction, drilling and blasting method accounts for 60-70%.Drilling and blasting method broken rock
Principle is drastically reacted in the confined space in drilling using explosive, and the stress wave for generation of exploding makes rock mass produce crack, by quick-fried
The gas that the fried high temperature produced, gases at high pressure are formed, which is carved, promotes rock mass further to crush.
Research shows, during drilling and blasting method broken rock, effective filling can make extended durations of action of the detonation gas to rock mass, save
Explosive consumption, improves blast hole utilizing factor, the generation of toxic and harmful gas is reduced, so as to improve demolition effect.Experiment shows, fills out
During plug single hole broken rock amount ratio without filling when exceed 20-30%.
At present, during drill bursting construction, lower clogged to hole is broken into certain grain using rock powder caused by drilling or outward transport more
The coarse aggregate of degree is clogged, by certain stemming length, come under ensureing to the demolition effect in hole.For in sinking and blasting
Lateral aperture, then fill in row drilling filling using stemming, water stemming material or mechanical swelling.It is actual due to difficult to install for upward hole
In production, mostly clogged with packaging bag or immersion paper shell.It is lower to hole clogged using rock powder or coarse aggregate when, due to rock
Powder or coarse aggregate belong to bulk materials, are covered by its dead weight on explosive, frictional force is small between hole wall, to detonation gas
Sealing function is limited, can only can be only achieved the effect effectively clogged by lengthening stemming length.The overall length of blasthole need to so be increased
Degree, makes the increase of drilling expense.When being clogged using stemming, since the hardness and toughness of stemming are poor, filling construction is more tired
Difficulty, and the frictional force between the stemming and hole wall clogged is smaller, air-tightness is poor；The intensity index of stemming in itself and country rock difference compared with
Greatly, cause to clog most weak location when position is still explosion, become the weak spot of detonation gas premature leakage, cause explosion
Energy premature leakage.Upward hole is clogged using packaging bag or paper shell, under the conditions of direct initiation (hole-bottom blast), these paddings
Do not have plugging action at all, actually by the powder column of certain length near aperture as choke material plugging action, by
This brings the waste of explosive and the reduction of demolition effect.
To improve the technique effect of filling, domestic and foreign scholars have carried out grinding for different type choke material and filling method
Study carefully.
CN101318802A patent documents disclose the drilling and sealing device used during a kind of seismic blasting.Should
Device is to be placed in a porous round plastic shell to form by the circular non-woven cloth bag of splendid attire quick lime, and earthquake is blocked with it
Focus blasthole in exploration, is changed to the embedding block formula of prestressed high strength by the loose filling used originally and clogs, add packing
Wave impedance and interior frictional resistance, the problem of improving the diffusion too early of pack energy and loss, improve earthquake under equal conditions
The depth of exploration and surveying accuracy of exploration.But there are following technical problem in use for the device：
1st, quick lime can discharge substantial amounts of heat during meeting water reaction generation calcium hydroxide in device, produce choke material
High temperature.During drilling and blasting method explosion, need to be laid with boosting explosive material, mainly nonel tube or primacord, the peace of these materials in hole
Full tolerable temperature is below 120 °, once exceeding the temperature, detonation train can be destroyed, cause to send out the high temperature that choke material produces
Raw miss-fire accident.
2nd, expansion can be produced radial and axial after the quick lime chance water in non-woven bag, in radial direction due to being subject to blasthole
The constraint of wall, can make expansion because plastic shell is limited to the axial constraint of expansion, cause axial expansion larger to axial development,
And deficiency is radially expanded, make choke material and hole wall makes degree deficiency up, and filling effect is not ideal enough.
3rd, plastic shell toughness is poor, and certain restraining force is produced to quick lime water-swellable, not only influences choke material
The extent of reaction, and influence making up for choke material and blasthole hole wall.
4th, quick lime must reach the volumetric expansion multiple that certain water absorption rate can just make reaction reach needs, therefore use and be somebody's turn to do
Water filling it must could meet the needs of reaction into blasthole during device.For lower to hole, in hole requirement of the water-filling to explosive improve,
Waterproof emulsion explosive need to be used, causes construct complexity increase and blasting cost raising；For lateral aperture and upward hole, because can not
The water-filling into hole, is restricted the use of the device.
The Chinese patent literature of Application No. 201310677936.3 discloses one kind nothing for LARGE APERTURE STATIC IMAGING explosion
Woven fabric is sewed or the hole plugging device of the cylinder of bonding parcel static fracture agent.The characteristics of device is absorbed water using non-woven fabrics, by powder
The cracking agent of shape is packed, absorb water saturation after, on clogging to or it is lower to hole, carry out expansion fracturing.But nonwoven cloth material
Porosity itself is larger, more with its packaging powdered expanding material, material leakage；Secondly as the toughness of non-woven fabrics is larger, nothing
Method loads cracking agent closely knit, causes its density smaller, it is impossible to produces enough bulbs of pressure, influences to clog effect；Meanwhile this
Kind hole plugging device considers reaction temperature because being not required to, and when being clogged applied to drilling and blasting method, also results in detonation train and damages, therefore its
It is not directly applicable drilling and blasting method blast hole stemming.103591858 A patent documents of CN disclose one for LARGE APERTURE STATIC IMAGING explosion
The machine plugging device that kind is made of centrum, taper pin, housing, spring and bolt, after static breaking agent slurry injection hole, is used
It blocks drilling.The device is pure mechanic structure, and manufacture cost is higher, and it is larger to promote and apply difficulty.
Utility model content
In view of the above-mentioned problems of the prior art, the purpose of this utility model is to provide one kind to passing for drillhole blasting
Quick-fried system, which will not produce after destruction (swelling agent maximum temperature be no more than 60 °), expansion, makes that degree is high, pressure up with borehole wall
Power and stiction are big, use drilling tamponade device simple, applied widely.
To achieve the above object, the drilling tamponade device provided by the utility model for drillhole blasting, including powder column, axis
To expansion constraint mechanism, elastic protecting sleeve, heat pad and heat insulating mattress；
The powder column by internal layer be sponge, outer layer be it is kraft compounded made of the circular built-in swelling agent of packing tube form,
There is the permeable hole being spaced apart on brown paper；
The swelling agent is by burning CaO, NaHCO3, quartz sand, clay, polymer absorbent material and absolute ethyl alcohol it is (organic
Solvent) composition is mixed, the weight proportion of each component is：Burning CaO 52% -66.5%, NaHCO33% -5%, quartz sand
15% -20%, clay 7% -10%, polymer absorbent material 0.5% -1%, absolute ethyl alcohol 8% -12%；
The axial expansion constraint mechanism is including the screw through the powder column central shaft and is respectively fitted over the exposed portion of screw
Two blanking covers being divided to, the outside diameter of blanking cover is smaller 2-5mm than boring aperture, bigger 10-15mm than powder column diameter, straight more than powder column
The blanking cover edge in footpath, which has into water and exhausting-gas hole, the both ends of the surface of the powder column, to be compressed with blanking cover by the nut coordinated with screw, made
Powder column is fixed on screw；
The axial length of the elastic protecting sleeve be more than the axial expansion constraint mechanism in two blanking cover outer ends spacing,
Aperture is less than the outside diameter of blanking cover, is socketed in by elasticity in the outer rim of blanking cover, the powder column is enclosed in elastic protecting sleeve and blanking cover
In the space of formation；
The heat pad includes flexible flat shape silica gel sack made by leather, and silica gel sack made by leather is built-in to be made of refrigerant and cool storage material
Mixture, is wrapped with water bag in mixture, heat pad is attached to the inner face of elastic protecting sleeve, the axis of its axial length and elastic protecting sleeve
It is identical to length, the arc length of radial strut be elastic protecting sleeve girth 10% -25% (heat pad take arc strip be for
Saving material)；
The size of the heat insulating mattress is identical with heat pad, is made of the low flexible material of the coefficient of heat conduction, with heat pad phase
The corresponding outer surface for being attached to elastic protecting sleeve.
The utility model is used for the preparation method of the drilling tamponade device of drillhole blasting, comprises the following steps：
Step 1, weigh raw material, wherein burning CaO, NaHCO according to the weight proportion of swelling agent ingredient3, clay it is equal
For powder；Polymer absorbent material and quartz sand are respectively anhydrous particle shape solid；
Step 2, by burning CaO, NaHCO3, clay, quartz sand and polymer absorbent material mixing, be stirring evenly and then adding into
Absolute ethyl alcohol continues to stir, and wetting shape is made and (liquid does not occur under the effect of 10-15KN pressure to separate out) swelling agent；
Step 3, make packing tube
The brown paper that the sponge for being 3-5mm with thickness makees internal layer, thickness is 0.1mm makees outer layer, with mould and binding agent system
It is less than the packing tube of bore diameter 10mm into diameter, the length of packing tube is calculated as follows
H1=(0.2~0.3) L
In formula：The length (cm) of L --- drilling,
H1--- the length (cm) of packing tube,
One end of the packing tube of making is sealed and (can make joint filling material with identical brown paper)；
Step 4, make powder column
By wetting shape expansion made of step 2) it is loaded into by mechanical or manual mode in the packing tube of step 3, load
When to ensure to load closely knit, the openend of the rear enclosed packing tube of filling, then on brown paper by setting aperture and interval
Size opens up circular or rectangle permeable hole, and powder column is made；
Step 5, the axial expansion constraint mechanism of installation
It is more than the screw of packing tube length 40mm along the central shaft of manufactured powder column through an a diameter of 4-6mm, length,
Wear the blanking cover of the dimensional structure respectively on two bared ends of screw, by two respectively the nut supporting with screw along screw
Both ends screwed forward, two blanking covers are shifted onto untill the both ends of powder column are clamped (powder column is fixed on screw), band are made
There is the powder column of axial expansion constraint mechanism；
Step 6, make heat pad, heat insulating mattress and elastic protecting sleeve
Take the Silicone Rubber that thickness is 0.2-0.3mm that the heat pad is made by bonding, while load and mix in heat pad
Refrigerant (low-temperature receiver material) and cool storage material after conjunction, and will be made of plastic film, the water bag of built-in water is placed in one；
With the aerogel blanket or glass fabric that thickness is 1-4mm, (the two belongs to the very low adiabatic heat-insulation of the coefficient of heat conduction
Material) the size heat insulating mattress identical with heat pad is made；
Take the Silicone Rubber that thickness is 0.3-1mm to be made the elastic protecting sleeve by bonding, at the same by above-mentioned heat pad and
Heat insulating mattress, which corresponds, to be respectively adhered in the inner surface and the outer surface of elastic protecting sleeve, is made partially with heat pad and heat-insulated
The elastic protecting sleeve of pad；
Step 7, by the elastic protecting sleeve made of step 6 partially with heat pad and heat insulating mattress be socketed in axial expansion about
In the outer rim of two blanking covers of beam mechanism, the powder column is enclosed in elastic protecting sleeve with the space of blanking cover formation, use is made
In the drilling tamponade device of drillhole blasting.
The utility model drills tamponade device in use, being steeped in water, and water inlet and exhausting-gas hole of the water from blanking cover enter
In gap between powder column and elastic protecting sleeve, swelling agent is entered by the permeable hole on packing tube outer layer brown paper and sponge,
After soaking time 6-8min, powder column absorbs water to saturation state；Then device is taken out from water, is put into the position that drilling needs to clog
Put, heat insulating mattress is covered in boosting explosive material (nonel tube or primacord), stopper.
The beneficial effects of the utility model：
1st, the utility model adds NaHCO in swelling agent3It can play the role of absorbing CaO and water reaction is exothermic,
Its principle is
CaO meets water and reacts generation calcium hydroxide, while discharges heat (the quality reaction heat release of 1 mole of CaO is
64.5KJ)：
CaO+H2O=Ca (OH)2Δ H=-64.5KJ/mol；
NaHCO3The generation endothermic reaction, generates Na2CO3、CO2And H2O, while absorb heat (1 mole of NaHCO3Quality is anti-
Should be absorbed heat 45.8KJ)：
2NaHCO3=Na2CO3+CO2+H2O Δs H=+91.6KJ/mol.
The utility model is exactly according to this principle, and suitable NaHCO is added in swelling agent3, CaO was reacted with water
Journey releases a part in thermal discharge by NaHCO3Decomposition reaction is absorbed, so as to reduce what swelling agent water swelling in powder column produced
Heat, makes it be no more than the tolerable temperature of detonation train, ensures detonation train safe operation.Meanwhile reaction of sodium bicarbonate is given birth to
Into reaction of the water to CaO and water may also function as facilitation and acceleration；NaHCO3The CO of decomposition reaction release2Can be with CaO
Combination reaction, the Ca (OH) of generation are carried out with water2Calcification reaction generation CaCO is run through again3, the fine and close journey of powder column can be increased
Degree, not only improves the filling effect for improving device, and is conducive to extend the time of expansion reaction.
2nd, the utility model utilizes NaHCO above-mentioned3On the basis of absorbing the partial heat that swelling agent reaction is released, in bullet
Property protective case correspond to drilling in boosting explosive material position surfaces externally and internally on be additionally arranged heat pad and heat insulating mattress respectively, by inhaling
Heat pad reabsorbs swelling agent reaction liberated heat, and remaining heat is obstructed by heat insulating mattress, and three measures develop simultaneously,
The temperature for the boosting explosive material for ensuring to be covered by heat insulating mattress is below its tenability limit temperature, so that it is guaranteed that the normal work of detonation train
Make, prevent the generation of miss-fire accident.
3rd, the utility model adds absorbent material (such as hydroscopic high-molecular resin SAP) in swelling agent, when powder column is soaked,
The material can quickly absorb water gelatinization, can promote brown paper and the absorption speed of sponge.Meanwhile the material as a form of gel of generation has one
Fixed water storage effect, when burning CaO starts reaction, continuously supplies water for it, is conducive to improve completeness of reaction,
Improve turgor pressure.
4th, the utility model adds absolute ethyl alcohol and expansive clay (main component is montmorillonite) in swelling agent, utilizes
Expansive clay mixes the characteristic of viscosity increase after wetting with absolute ethyl alcohol, can be by CaO and NaHCO3Carried out Deng pulverulent material
It is deadlocked, and then wetting state is mixed into granular materials such as quartz sands, not only greatly facilitate swelling agent to be loaded into packing tube,
And the density (being conducive to improve the turgor pressure that reaction produces) of swelling agent in powder column can be improved.Absolute ethyl alcohol in swelling agent with
The time can gradually volatilize (experiment shows after placing one day that Residual ethanol is only 1-2%), and the reaction of swelling agent will not be produced
Raw adverse effect.
5th, the utility model makees outer layer with brown paper with holes, sponge makees internal layer, the two is combined the packing tube of swelling agent,
Make packing tube good toughness using the toughness of brown paper, improve the absorption speed of swelling agent using the quick water imbibition of sponge, can expire
Quickly filling and the requirement of rapid soaking of sufficient production scene.
6th, the both ends of powder column are tightly clamped by the blanking cover in axial expansion restraint device in the utility model, make swelling agent anti-
Axial expansion is limited during answering, and can only be developed to radial direction, so that greatly improving it is radially expanded pressure, by flexible
Silicone Case enables the powder column after expansion highly to be made up with the inner wall to drill, and pressure and stiction increase, effectively improve
The filling quality and filling effect of device.
7th, the flexible and elastic Silicone Rubber interplanting protective case of the utility model apparatus, is filled out not influencing powder column performance expansion
In the case that plug acts on, there are two effects：One is to play temporary transient effect of contraction after being put into drilling to the powder column after soaked, is prevented
Only powder column occurs " dusting " (swelling agent sprays in the gap between powder column and drilling) because reaction is fierce；Another effect is to make
Fully soaked powder column can both be packed with also clogging anhydrous rising borehole, horizontal drilling to drilling under water under its protection
With lower to drilling, the scope of application of tamponade device is widened.
8th, the utility model drilling tamponade device can batch production batch production, it is easy to carry, use simple, reaction speed
It hurry up, filling quality is high, clogs the drilling of drillhole blasting with it, drilling utilization rate is high, and demolition effect is good, and explosive specific charge is low.
Brief description of the drawings
Fig. 1 is the axial sectional view of the utility model drilling tamponade device；
Fig. 2 is the side view of Fig. 1；
Fig. 3 is the axial sectional view of powder column in Fig. 1；
Fig. 4 is the side view (half-sectional) of Fig. 3；
Fig. 5 is A portions enlarged drawing in Fig. 2；
Fig. 6 is the expanded view (half-sectional) of heat pad in Fig. 2..
Symbol description in figure：1- elastic protecting sleeves, 2- water inlets and exhausting-gas hole, 3- nuts, 4- gaskets, 5- blanking covers, 6- screws,
7- powder columns, 71- brown paper, 72- sponges, 73- swelling agents；74- permeable holes, 75- (packing tube) sealings, 8- heat pads, 81- silica gel
Sack made by leather, 82- refrigerants, 83- cool storage materials, 84- water bags, 9- heat insulating mattress.
Embodiment
The utility model is further described below in conjunction with drawings and examples.
Originally example is applied by taking certain mine drilling and blasting method exploitation hard rock ore body as an example, its blasting boreholes is straight to anhydrous drilling, drilling on
Footpath is 65mm, length 2m.
Tamponade device for this kind drilling as depicted in figs. 1 and 2, is protected by powder column 7, axial expansion constraint mechanism, elasticity
Sheath 1, heat pad 8 and heat insulating mattress 9 form.
Powder column 7 therein makees internal layer as shown in Figure 3 and Figure 4, by sponge 72, brown paper 71 makees the compounded circle of outer layer
The built-in swelling agent 73 of packing tube is formed, and sponge thickness is 0.3mm, and brown paper thickness is 0.15mm, and packing tube length is 400mm,
Outer dia is 50mm, and both ends brown paper makees sealing 75, has the axial spaced 10mm, both sides symmetrical on brown paper
20 permeable holes 74, a diameter of 10mm of permeable hole.
Swelling agent in powder column is by burning CaO, NaHCO3, quartz sand, clay, polymer absorbent material and absolute ethyl alcohol mix
It is combined into, the weight proportion of each component is：Burning CaO66.5%, NaHCO33%, quartz sand 15%, clay 7%, macromolecule
Absorbent material 0.5%, absolute ethyl alcohol 8%.
Axial expansion constraint mechanism therein as depicted in figs. 1 and 2, including 6 He of screw through the powder column central shaft
Two blanking covers 5 being sleeved on screw exposed parts；A diameter of 6mm of screw, the length of 440mm；Blanking cover plastic production, its
Outside diameter is 63mm, diameter be more than powder column diameter blanking cover edge open up four symmetrical, a diameter of 4mm in interval water inlet it is simultaneous
Exhausting-gas hole 2；The both ends of the surface of two blanking covers and powder column are compressed respectively using two nuts 3 coordinated with screw and gasket 4, make medicine
Column is fixed on screw.
Elastic protecting sleeve 1 therein is made of the Silicone Rubber of 0.5mm as shown in Figure 5 and Figure 6, by thickness, its axial length
For 440mm, aperture 60mm, elastic protecting sleeve is socketed in the outer rim of blanking cover by elasticity, and powder column is enclosed in elastic protecting sleeve
In space between blanking cover.
Heat pad 8 therein as shown in fig. 6, including be in after expansion flexible flat shape silica gel sack made by leather 81, in silica gel sack made by leather
The cool storage material 83 formed equipped with the refrigerant 82 being made of urea or calcium ammonium nitrate and by the efficiently poly- cryogen of Polyvinyl alcohol-borax
The mixture of composition, the water bag 84 being made of the packed water of plastic film is wrapped with mixture, and the length after heat pad expansion is
440mm width is 47mm the 25% of elastic protecting sleeve girth (be equal to), thickness 3mm；Heat pad is pasted onto elastic protecting sleeve
Inner face (as depicted in figs. 1 and 2).
Heat insulating mattress 9 therein is made of the low aerogel blanket of the coefficient of heat conduction or glass fabric, size and heat pad phase
Together, it is corresponding with heat pad to be pasted onto on the outer surface of elastic protecting sleeve.
The production method of above-mentioned drilling tamponade device comprises the following steps：
Step 1, weigh raw material, wherein burning CaO, NaHCO according to the weight proportion of swelling agent ingredient3, clay it is equal
For powder；Polymer absorbent material and quartz sand are respectively anhydrous particle shape solid；
Step 2, by burning CaO, NaHCO3, clay, quartz sand and polymer absorbent material mixing, be stirring evenly and then adding into
Absolute ethyl alcohol continues to stir, and wetting shape is made and (liquid does not occur under the effect of 10-15KN pressure to separate out) swelling agent；
Step 3, make packing tube
Make internal layer with the sponge of the thickness, the brown paper of the thickness makees outer layer, be made of mould and binding agent described
The packing tube of diameter and length, one end of packing tube are sealed with same brown paper；
Step 4, make powder column
Wetting shape swelling agent made of step 2 is loaded into the packing tube of step 3 by mechanical or manual mode, is loaded
When, will ensure to load closely knit, and the openend of the rear enclosed packing tube of filling, is then opened up on brown paper by the mutual spacing
The circular permeable hole in the aperture, is made powder column；
Step 5, the axial expansion constraint mechanism of installation
The screw is passed through along the central shaft of manufactured powder column, two blanking covers are each passed through screw two expose
End, then two gaskets are respectively fitted on leading screw, pad in the outside of blanking cover, by two nuts supporting with screw respectively along screw
Both ends screwed forward, untill two blanking covers are shifted onto that the both ends of powder column are clamped, powder column is fixed on screw, is made
Into the powder column with axial expansion constraint mechanism；
Step 6, make heat pad, heat insulating mattress and elastic protecting sleeve
Heat pad is made by bonding with the Silicone Rubber, while mixed refrigerant and cold-storage are loaded in heat pad
Material, and the water bag is placed in one；
The size heat insulating mattress identical with heat pad is made with aerogel blanket or glass fabric；
The elastic protecting sleeve is made by bonding with the Silicone Rubber, at the same above-mentioned heat pad and heat insulating mattress is mutually right
It should be respectively adhered in the inner surface and the outer surface of elastic protecting sleeve, the resilient protection partially with heat pad and heat insulating mattress is made
Set；
Elastic protecting sleeve with heat pad and heat insulating mattress made of step 6, is socketed in axial expansion constraint machine by step 7
In structure in the outer rim of two blanking covers, the powder column is closed together with blanking cover, the drilling tamponade device for drillhole blasting is made.
During onsite application, above-mentioned drilling tamponade device is soaked into 6-8min into the water, powder column is absorbed water within the time
To saturation state；Then it is taken out from water, the heat insulating mattress center of tamponade device alignment boosting explosive material (nonel tube or
Primacord) fill in top be put into explosive rising borehole lower part (for anti-locking apparatus glide, appropriate paper shell can be filled in and blocked up temporarily
Plug), complete the installation of tamponade device.Swelling agent in powder column can react in 30-50min, volumetric expansion, produce 3-
The turgor pressure of 5MPa, at this pressure, water bag breaks in heat pad, the refrigerant in heat pad meets water, and to dissolve and absorb swelling agent anti-
The heat that should be discharged, while cool storage material meets glue, becomes the material as a form of gel that there is cold-storage to act on, the long period keeps
Lower temperature.
The present embodiment adds 5% NaHCO in powder column3, it can absorb CaO and reacts exothermic 25-42% with water, with
Do not add NaHCO3Compare, the surface temperature of powder column can drop to 90-100 DEG C by 130 DEG C or so, then further through heat pad
Heat absorption and heat insulating mattress are heat-insulated, and the temperature at boosting explosive material can be down to 45-55 DEG C, well below the tolerable temperature of boosting explosive material, make
The operational reliability of detonation train is effectively ensured.
Constrained, can only be developed to radial direction be subject to expansion constraint mechanism simultaneously as the expansion of swelling agent reaction volume is axial,
Its bulbs of pressure is formed after packing tube is crushed together with elastic protecting sleeve with borehole wall fully makes up, pressure and stiction
Increase, it is ensured that filling reliable in quality, the broken rock amount of detonation gas reach optimal.
Claims (1)
- A kind of 1. drilling tamponade device for drillhole blasting, it is characterised in that including powder column (7), axial expansion constraint mechanism, Elastic protecting sleeve (1), heat pad (8) and heat insulating mattress (9)；The powder column (7) by internal layer is sponge (72), outer layer is the built-in expansion of the compounded circular packing tube of brown paper (71) Agent (73) is formed, and has the permeable hole (74) being spaced apart on brown paper；The axial expansion constraint mechanism is including the screw (6) through the powder column central shaft and is respectively fitted over screw exposed parts On two blanking covers (5), the outside diameter of blanking cover is smaller 2-5mm than boring aperture, bigger 10-15mm than powder column diameter, more than powder column The blanking cover edge of diameter has into water and exhausting-gas hole (2), and the both ends of the surface of the powder column pass through the nut (3) and blanking cover that coordinate with screw Compress, powder column is fixed on screw；The axial length of the elastic protecting sleeve (1) be more than the axial expansion constraint mechanism in two blanking cover outer ends spacing, Aperture is less than the outside diameter of blanking cover, is socketed in by elasticity in the outer rim of blanking cover, the powder column is enclosed in elastic protecting sleeve and blanking cover In the space of formation；The heat pad (8) includes flexible flat shape silica gel sack made by leather (81), and silica gel sack made by leather is built-in the refrigerant being mutually mixed (82) and cool storage material (83) water bag (84), is wrapped with the refrigerant and cool storage material that are mutually mixed, heat pad is attached to elastic guarantor The inner face of sheath, its axial length is identical with the axial length of elastic protecting sleeve, and the arc length of radial strut is elastic protecting sleeve week Long 10% -25%；The size of the heat insulating mattress (9) is identical with heat pad, is made of the low flexible material of the coefficient of heat conduction, opposite with heat pad The outer surface of elastic protecting sleeve should be attached to.
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201720463204.8U CN207335553U (en) | 2017-04-28 | 2017-04-28 | A kind of drilling tamponade device for drillhole blasting |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201720463204.8U CN207335553U (en) | 2017-04-28 | 2017-04-28 | A kind of drilling tamponade device for drillhole blasting |
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| CN207335553U true CN207335553U (en) | 2018-05-08 |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN114264207A (en) * | 2021-08-16 | 2022-04-01 | 北方工业大学 | Automatic stemming plugging device for blast hole and blast hole plugging method |
-
2017
- 2017-04-28 CN CN201720463204.8U patent/CN207335553U/en active Active
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN114264207A (en) * | 2021-08-16 | 2022-04-01 | 北方工业大学 | Automatic stemming plugging device for blast hole and blast hole plugging method |
| CN114264207B (en) * | 2021-08-16 | 2024-01-09 | 北方工业大学 | Automatic stemming blocking device for blasthole and stemming blocking method |
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