US3769874A - Method of pumping explosive slurry - Google Patents

Method of pumping explosive slurry Download PDF

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US3769874A
US3769874A US00274430A US3769874DA US3769874A US 3769874 A US3769874 A US 3769874A US 00274430 A US00274430 A US 00274430A US 3769874D A US3769874D A US 3769874DA US 3769874 A US3769874 A US 3769874A
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slurry
hose
additive
explosive
pump
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Expired - Lifetime
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US00274430A
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D Williams
A Wisinski
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Orica Ltd
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ICI Australia Ltd
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    • C—CHEMISTRY; METALLURGY
    • C06—EXPLOSIVES; MATCHES
    • C06B—EXPLOSIVES OR THERMIC COMPOSITIONS; MANUFACTURE THEREOF; USE OF SINGLE SUBSTANCES AS EXPLOSIVES
    • C06B21/00—Apparatus or methods for working-up explosives, e.g. forming, cutting, drying
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F42—AMMUNITION; BLASTING
    • F42D—BLASTING
    • F42D1/00—Blasting methods or apparatus, e.g. loading or tamping
    • F42D1/08—Tamping methods; Methods for loading boreholes with explosives; Apparatus therefor
    • F42D1/10—Feeding explosives in granular or slurry form; Feeding explosives by pneumatic or hydraulic pressure

Definitions

  • the invention is to a method of filling bore-holes by pumping an explosive slurry by a primary pump through a hose more than 50 ft. in length to e second- [30] Forelgn Apphcamm Pnonty Data ary unit in a restricted underground space. From the Aug. 16, 1971 Australia 5915 ondar unit th xplosive lurry is pumped through a hose inserted in a borehole and an additive is pumped [52] C 8 into the explosive slurry. Control devices for control- 302/12 ling the flow of explosive slurry are provided. [51] Int. Cl.
  • Slurried explosives normally comprise at least one oxygen releasing salt selected from the group consisting of inorganic nitrates, and perchlorates and mixtures thereof, a thickening agent, a fuel and water.
  • oxygen releasing salt selected from the group consisting of inorganic nitrates, and perchlorates and mixtures thereof, a thickening agent, a fuel and water.
  • additives for example agents increasing sensitivity and fuel content, may be added.
  • the oxygen releasing salt is chosen from the nitrates of the alkali metals or ammonium such as ammonium nitrate and sodium nitrate.
  • the amount of oxygen releasing salt is not narrowly critical; compositions containing amounts of oxygen releasing salts from 50% w/w to 90% w/w of the total composition are satisfactory.
  • the particle size and'shape of the oxygen releasing salt is not critical and is well known from the art of ammonium nitrate manufacture; powders and prilled particles are satisfactory.
  • the nature of the fuels in such compositions is determined by the requirements that they burn in the presence of oxygen or an oxygen containing gas and that their physical nature is such that they may be incorporated in such compositions in a manner so as to be substantially uniformly distributed throughout the compositions.
  • Such fuels arewell known in the art and they may be organic or inorganic and may also be derived from animals and plants.
  • the fuels employed in such compositions can be, for example, self-explosive fuel, non-explosive carbonaceous fuel, non-metallic and metallic fuels or mixtures of the aforementioned types of fuels. They can be varied widely provided that, in the composition in which any particular fuel is used, the fuel is stable, that is, prior to detonation, during preparation and storage, the fuel is chemically inert to the system.
  • selfexplosive fuels include one or more organic nitrates, nitro compounds and nitramines such as trinitrotoluene, cyclotri(or tetra)-methylene tri(or tetra)nitramine, tetryl, pentaerythritol tetranitrate, explosive grade nitrocellulose and nitro-starch.
  • organic nitrates such as trinitrotoluene, cyclotri(or tetra)-methylene tri(or tetra)nitramine, tetryl, pentaerythritol tetranitrate, explosive grade nitrocellulose and nitro-starch.
  • the self-explosive fuel can be for example in any of the well-known flake, crystalline orpelleted forms. In general up to 35 percent and preferably from to 30 percent by weight based on the weight of composition of self-explosive fuel is used.
  • Suitable water soluble fuels are organic water soluble substances, for example urea, carbohydrates such as sugars or molasses, water soluble alcohols or glycols, glues or mixtures of these.
  • the proportion of water soluble fuel in such compositions should be at least 0.8% w/w and may be as high as 8% w/w of the total composition.
  • Suitable water insoluble or sparingly water soluble fuels may be chosen from inorganic materials for example sulphur, aluminium, silicon, magnesium, titanium, boron, mixtures thereof and mixtures of aluminium with ferro-silicon or organic materials for example finely divided charcoal, anthracite, gilsonite, asphalt, cellulosic materials such as sawdust, or cereal products for example flours, dextrins or starches.
  • inroganic fuel is a metal it is preferably in powder form ranging in particle size from very fine, for example a powder passing a 200 B.S.S. sieve, to coarse, for example a powder retained on a 30 B.S.S. sieve.
  • ln particular aluminium powder passing a 300 B.S.S. sieve for example paint fine aluminium
  • the propor tion of water insoluble or sparingly water soluble nonmetallic fuels in such compositions is usually in the range from 1% w/w to 10% w/w of the total composition.
  • the proportion of metallic water'insoluble fuels, such as aluminium, when present in such compositions may be as high as 25% w/w and amounts in the range from 1% w/w to 15% w/w of the total composition are usually preferred.
  • the proportion of water in such compositions should be suffiicent to dissolve at least part of the water soluble fuel when present, and part of the oxygen releasing inorganic salt, say from 5% w/w up to 35% w/w, but not be in excess of the explosive limit of the composition.
  • thickening agents viscosity raising agents
  • galactomannan polysaccharides such as guar gum, Tara and Paloverde gums, pregelatinised starches, hydroxyethylcellulose, carboxymethylcellulose, tamarind seed flour and hydrophilic vinyl polymers such as polyacrylamide.
  • the most widely used of these thickening agents have been the galactomannans, particularly guar gum.
  • compositions comprising polysaccharides such as guar gum are mixed with appropriate crosslinking agents, the viscosity of the composition is increased.
  • crosslinking agents conventionally employed for galactomannans can be used including potassium and sodium dichromate, sodium tetraborate, borax, certain transition metal salts and certain soluble antimony and bismuth compounds.
  • alkali metal dichromates for example sodium and potassium dichromates, are especially preferred.
  • the proportion of polysaccharide and conventional crosslinking agent used in preparing 'the thickening agent component of the viscous slurried explosives can vary over quite wide limits depending on the agent used as is well known in the art.
  • the proportion of guar gum may vary from'0.l to 5% w/w of total composition and the proportion of zinc chromate may vary from 0.01 to 3% of total composition.
  • a mixture of sodium or potassium dichromate and a soluble iron, zinc, aluminium or antimony salt may be used.
  • sodium or potassium dichromate the proportion of sodium or potassium dichromate in the viscous slurried explosive should be in the range from 0.003 to 0.9% w/w, the proportion of soluble salt should be in the range from 0.001 to 0.3% w/w of the viscous slurried explosive.
  • Explosive slurries may also be thickened by viscosity raising agents formed from the in situ polymerisation of monomers or mixtures of monomers.
  • monoethylenically unsaturated. monomers which are suitable include amides such as acrylamide, methacrylamide and N-methylacrylamide and hydroxyalkyl derivatives such as alpha,2-hydroxyethylacrylamide and alpha-hydroxymethylacfylamide; acids such as acrylic acid and methacrylic acid; salts of acrylic acid such as sodium, potassium or ammonium acrylate; and soluble salts of monovinylpyridines, particularly and preferably the nitrate salts of the 4-vinylpyridine.
  • Acrylamide is a particularly preferred monomer because of its low cost and rapid polymerisation in the presence of free radical polymerisation promoters in the aqueous phase of the blasting compositions.
  • concentration of acrylamide used ranges from 0.3 to 10 percent and especially from 0.5 to 5 percent.
  • Suitable promoters include sodium, potassium and ammonium salts of inorganic peracids such as persulphates, perborates and pervanadates; hydrogen peroxide and organic peroxide and azo catalysts such as azobis(isobutyronitrile),alpha,alpha'-a zobis(alpha,gamma-dimethyl-gammamethoxyvalero-nitrile), tertiary butyl hydroperoxide, methylvinyl ketone peroxide, benzoyl peroxide and peracetic acid.
  • Persulphates are usually preferred.
  • Redox systems that utilise a source of persulphate ion (S,O ').as one component; are suitable throughout a range ofconcentrations of inorganic persulphate salt; can be used alone in the solution of inorganic oxidising salt to promote the copolymerisation reaction or an added reducing agent can also be employed to form a redox couple.
  • Reducing agents that can also be used if desired include nitrogen bases such as hydroxylamine, carbohydrazide and, particularly, hydrazine.
  • the polymerisation system also includes a minor amount of metal ion, usually a Group [B metal ion; These metalions' 'are introduced as soluble inorganic or organic salts, e.g. as the nitrates, sulphates or acetates.
  • metal ion usually a Group [B metal ion;
  • Other useful persulphate couples are I-ISO- (S2Og) and Fe -(S2O and SgO (S2Og) and nitro-tris-propionamide -(S O
  • the total amount of promoter used varies with the particular.
  • promoter and monomers increases proportionately with the desired speed of polymerisation, but usually is at least 0.002 percent and preferably within the range of about from 0.002 to 3 percent based on the total weight of aqueous phase containing monomers to be polymerised, large excesses of promoter having no detrimental effect on the gel structure.
  • concentration of the preferred persulphate ions based on total monomers, i.e. both monoand polyethylenically unsaturated, can vary considerably depending'on the particular polymerisation system, the desired consistency of the gel, and the presence or absence of supplementary promoter components, but in general will be about from 0.005 to 2 percent by weight of'the aqueous phase.
  • cartridge cases may,
  • slurried explosives in a factory anditransported to the mine for use.
  • Packaged slurried explosives are expensive and have none of the economies inherent in the use of bulk loaded slurried explosives. Bulk loaded slurried explosives are cheap and readily available and therefore it is surprising that they have not; been used widely in underground operations. The main reason for this lack of use resides in the fact that minimised.
  • the slurry is normally prepared and pumped at an elevated temperature so as to decrease the viscosity of the slurry.
  • a further difficulty in using explosive slurries underground is that the boreholes normally used underground are of a much smaller diameter than those used in open cut mining.
  • Small boreholes are used in underground mining operations because firstly, it is difficult,-and often impossible, to carry the large and heavy machinery required for boring large holes in the restricted passages adjacent to the working area and, secondly, because in underground mining there is a need for much greater control of blasting power to prevent ore dilution or excessive ground vibration leading to uncontrolled collapse of the roof of the mine passages.
  • the viscosity of explosive slurries suitable for use in long upwardly inclined boreholes is much greater than that required for the downwardly inclined boreholes normally used in above ground operations.
  • suitable explosive slurries need only have sufficient viscosity to prevent or reduce seepage of water desensitising the expolsive charge.
  • suitable explosive slurries must in addition have sufficient viscosity to remain in place in the borehole. The required increase in viscosity of the explosive slurry also increases the shearing forces generated in the slurry when the slurry is manipulated by, e.g. pumping.
  • an apparatus comprising in combination a primary pump adapted to .deliver explosive slurry through a hose more than 50 ft in length, connected to a secondary unit and a means of adding an additive to the slurry at, or after, the secondary unit.
  • We also provide a method of preparing a suitable ex-' plosive slurry for use in underground workingin restricted spaces comprises pumping explosive slurry through a hose to a secondary unit 10- cated in the restricted space and thence pumping the mixture to a borehole wherein an additive is added to the slurry at or after the secondary unit.
  • secondary unit we mean a unit providing in combination a portable secondary pump and a portable buffer storage tank.
  • the secondary unit is either of suitable dimensions and weight to be carried manually into the restricted areas without dismantling, or may be readily dismantled into easily portable sections and readily reassembled in a restricted area.
  • the additive may be added to the slurry by any means known in the art. For example it may be added at the secondary unit or it may be injected into the hose leading from the secondary unit into the borehole. We prefer that the additive is pumped through a separate hose and mixed with the explosive slurry immediately prior to delivery of the slurry into the borehole.
  • the means of adding the additive comprises an additive tank, the contents of which may be pumped via an additive pump through a separate hose to the end of the explosive slurry hose.
  • the primary pump is automatically stopped when the hopper is full and restarts when slurry is removed from the slurry hopper.
  • the secondary unit is controlled by a remote control device which can be operated by an operator standing near the borehole to be filled.
  • a remote control device which can be operated by an operator standing near the borehole to be filled.
  • a detonation trap is inserted between the bulk tank and the secondary unit.
  • Suitable detonation traps are well known and include air voids or constrictions in the hose leading from the bulk tank to the secondary unit.
  • the slurry remaining the secondary unit and in the hose leading from the primary pump to the secondary unit may be returned by means of air pressure applied to the secondary unit.
  • the additive is pumped in a separate stream into the borehole and mixed with the explosive slurry at the end of the hose carrying the explosive slurry into the borehole.
  • the additive and the slurry may be pumped into the borehole thorugh two separate hoses.
  • hoses carrying the separate streams of material in an outer casing or hose.
  • the hose carrying the major component of the product is used to encase the hoses supplying the streams of the minor components of the product.
  • a single hose may be used comprising two or more conduits.
  • the means of mixing the streams of material to form the product is any mixer of such dimensions that it can be inserted into the void when the mixer is attached to the end of the means for supplying the separate streams of materials.
  • the mixer is of the type known in the art as an interfacial surface generator mixer.
  • Such a mixer is characterised by having no moving parts, but the mixer comprises a plurality of interfacial surface gener ators. It is also characteristic of such mixers that they may be made in any suitable external diameter.
  • a suitable mixer for example, is the Static Mixer manufactured by the Kenics Corporation of the U.S.A.
  • the hose and mixing means should be withdrawn from the hole at, or approximately at, the rate at which it is being filled; however, it is, of course, impossible to observe the rate of charging visually and recourse must therefore be taken to indirect control, such as empirical operation or attempts to synchronise the linear rate of withdrawal with the linear rate of filling calculated from the pumping rate. As a rule this is a coarse approximation only and often maloperation results; if the hose is withdrawn too slowly it becomes embedded in the material and is likely to leave a columnar gap or cavity on being withdrawn or may even be permenently embedded in the slurry by excessive friction or blockages.
  • Withdrawal apparatus is defined as apparatus comprising a tube which is sealingly connected to the smaller opening of a truncated conical mantle made of a material sufficiently rigid or reinforced to be incapable of inversion, which mantle is mounted coaxially with, on and around said tube ator near its lower end and the wider opening of which mantle is nearer to the bottom end of said tube, and a flexible hose connecting the inlet end of said tube to the mixing means.
  • the tube is either sealingly attached to the mixing means or may itself be the outer case of the mixing means.
  • the purpose of the truncated conical mantle is to seal the hose against the wall of the borehole; thereby the cavity into which the blasting agent is being discharged is sealed, ingress of water into it is minimised and the fluid discharge pressure of the pump is exerted against the enclosed end of the hole thus producing upward thrust against the seal formed by the hose and the surrounding truncated conical mantle. Consequently the pump pressure aids or effects the raising of the hose synchronously with the rate of charging.
  • said conical mantle can be folded axially, downwardly but not upwardly towards the axis of said tube, so as to envelop it at least partly; in this folded down position, not unlike an inverted, folded-up umbrella, said assembly of tube and mantle may readily be inserted into the hole and subsequently on withdrawal of the hose the mantle is unfolded into its conical shape.
  • the material of construction of the mantle is not critical, but it must be strong enough to withstand upward thrust into the cone of up to several hundred pounds without collapsing, without being inverted upwardly and without tearing; its ability to resist upward inversion is critical and determines the choice of material, its thickness and its reinforcement. It may be made of rigid material, eg a metal or plastic sheet or, preferably, or flexible material of sufficient thickness, e.g. a rubber or polyethylene terephthalate sheet; preferably the sheet is pretreated to facilitate the operation of folding it downwards, centrally around the tube, e.g. by providing axial folds in the rubber sheet or by making the cone of a number of metal vanes slideable against each other and capable of being unfolded into a progressively wider cone.
  • rigid material eg a metal or plastic sheet or, preferably, or flexible material of sufficient thickness, e.g. a rubber or polyethylene terephthalate sheet; preferably the sheet is pretreated to facilitate the operation of folding it downwards, centrally
  • flexible truncated cones are reinforced by rods or strips running along the length of the cone in several, say, 2,3, 4 or 6 symmetrically placed positions; these strips may be made of particularly strong materials, e.g. spring steel and prevent inversion and expansion of the bottom opening of the cone beyond a predetermined size.
  • the larger opening of the truncated cone may be fitted at its widest (bottom) section with a skirt, which is an extension of the truncated cone, but is made .of a more flexible material such as rubber or foam rubber sheet and may act as a sealing washer at the walls of the hole between the discharged slurry and any water above it.
  • truncated cone implies that the central angle of the cone is, at all times, less than 180, in practice preferably less than 140 and most preferably less than 120.
  • the larger, bottom outlet of the truncated cone, in its fully unfolded position forms a circle or quasicircle having a diameter which approximates the diameter of the borehole, but which is characterised in that it is substantially smaller than 21, wherel is the length of the conical mantle.
  • the truncated cone may be sealingly attached to the tube exactly at or near the lower end of the tube which is to be inserted into the borehole; it may be wired on, or fittedremovably by means of a screw or bayonet fitting; the tube may protrude into the interior of the cone or even through both the top (small) and bottom (large) opening of the truncated cone. More than one, say 2 or 3 cones, mounted in series may also be used.
  • a cap closing the bottom (larger) opening of said truncated cone and removable from it by the pressure of fluid being discharged from the tube.
  • the nature of the additive is dependent on the nature of the explosive slurry. pumped from the tank into the secondary unit.
  • the physical nature of the explosive slurry will fall between two extremes. At one extreme the slurry has adequate viscosityfor use in upwardly inclined holes but will be desensitised by the shearing forces generated in the hose leading to the secondary unit. At the other extreme the slurry will of of low viscosity so that sensitivity is not lost by pumping but the viscosity is not sufficient for use in upwardly inclined holes.
  • the additive required is a sensitizing agent such as e.g. the finely divided metal described hereinbefore.
  • the additive required is a viscosity raising agent as have been described hereinbefore.
  • FIG. 1 is a schematic plan of a loading system of our invention
  • FIG. 2 is a flow diagram of the system.
  • FIG. 1 a bulk tank 1 is connected by means of hose 2 to the primary pump 3.
  • the primary pump is connected to the secondary unit 4 through the hose 5.
  • Crosslinking agent is stored in the tank 6 and pumped using the pump 7 to the static mixer 8 via the line 9.
  • the slurry is pumped to the static mixer 8 through the hose l0.
  • the bulk tank 1 is of conventional construction and may either remain outside the mine or may be located in a main gallery in the mine.
  • the primary pump 3, preferably a pneumatically powered pump is controlled by the air delivery valve 11.
  • the valve 11 is preferably controlled by an automatic control 12 which automatically cuts off the pump 3 when the slurry hopper .13 is full and starts the pump 3 when the slurry hopper 13 is partially empty.
  • Suitable automatic controls 12 are well known in the art; a convenient control is shown schematically in the figure.
  • the slurry in the hopper 13 is pumped via the pneumatically driven pump 13 to the inline mixer 8 where it is mixed with crosslinking agent from the line 11.
  • the loading hose 10 is fitted with a loading cone 15 and cap 16.
  • the operation of the secondary unit may be controlled by an operator standing by the unit and manually controlling the rate-of the slurry pump 14 and the crosslinking agent pump 7, however we prefer that the pumps 14 and 7 are controlled by remote control from a point near the borehole to be filled. Suitable pneumatic remote control devices for such pumps are well known in the art.
  • the secondary unit may be readily dismantled into two parts by uncoupling the flanges shown in FIG..]
  • the two parts may be manually carried and readily reassembled.
  • a method of filling boreholes from a restricted underground space comprises pumpingan explosive slurry from a bulk tank by means of a primary pump through a hose more than 50 ft. in length from a point outside the restricted underground space to a secondary un'it situated in the restricted underground space said secondary unit comprising a slurry hopper, a secondary pump, an additive tank and an additive pump; pumping the explosive slurry from the secondary slurry hopper by means of the secondary pump through a hose inserted into the borehole; pumping an additive from the additive tank by means of the additive pump into the slurry at, or after the secondary hopper; the operation of the primary pump being con- 9 w trolled automatically by the level of the slurry hopper sive slurry hose in the borehole.

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  • Chemical & Material Sciences (AREA)
  • Organic Chemistry (AREA)
  • Life Sciences & Earth Sciences (AREA)
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  • Engineering & Computer Science (AREA)
  • General Engineering & Computer Science (AREA)
  • Air Transport Of Granular Materials (AREA)
  • Consolidation Of Soil By Introduction Of Solidifying Substances Into Soil (AREA)
  • Soil Conditioners And Soil-Stabilizing Materials (AREA)
US00274430A 1971-08-16 1972-07-24 Method of pumping explosive slurry Expired - Lifetime US3769874A (en)

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Cited By (10)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4001060A (en) * 1973-07-19 1977-01-04 Olin Corporation Method for preparing an extrudable priming mixture containing modified karaya gum
US4408886A (en) * 1979-02-02 1983-10-11 Coal Industry (Patents) Limited Mixing equipment
US5686691A (en) * 1995-12-22 1997-11-11 Oea, Inc. Slurry-loadable electrical initiator
US6325572B1 (en) * 1996-10-22 2001-12-04 Frederic Dietrich Process and device for pneumatically conveying powdery substances and their use
US6397719B1 (en) * 1997-09-12 2002-06-04 Dyno Nobel Asa Method for loading slurry explosives in blast holes or cartridges
US20070062406A1 (en) * 2005-09-19 2007-03-22 Waldock Kevin H Mobile Platform for the Delivery of Bulk Explosive
CN102297641A (zh) * 2011-05-18 2011-12-28 湖北凯龙化工集团股份有限公司 一种粉状震源药柱多管自动装药压盖机
CN112012751A (zh) * 2020-08-24 2020-12-01 中国水利水电第七工程局有限公司 一种缓坡斜井精准开挖方法
CN114607398A (zh) * 2022-04-13 2022-06-10 中铁十九局集团轨道交通工程有限公司 一种盾构隧道管片壁后注浆施工方法及装置
RU2825232C1 (ru) * 2023-05-16 2024-08-22 Общество с ограниченной ответственностью "Глобал Майнинг Эксплозив - Раша" Линия приготовления гранулита

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GB2187490B (en) * 1986-03-05 1989-12-06 Aeci Ltd Charging of explosives into boreholes
AU1505388A (en) * 1987-05-05 1988-11-10 Aeci Limited Method and apparatus for loading explosives into boreholes
AU3374089A (en) * 1987-10-30 1989-11-02 Sasol Chemical Industries (Proprietary) Limited Explosive compositions
MW1689A1 (en) * 1988-04-21 1989-12-13 Aeci Ltd Loading of boreholes with exploves
RU2288205C1 (ru) * 2005-06-27 2006-11-27 Федеральное государственное унитарное предприятие "Научно-исследовательский институт полимерных материалов" Передвижная установка для приготовления и подачи флегматизирующего состава в полости утилизируемых зарядов из стрт
AU2009329274A1 (en) * 2008-12-19 2011-08-11 Iptree Trust (Truns Number 503/2009) A liquid key for use with pumpable explosives
RU2668894C2 (ru) * 2015-07-31 2018-10-04 Михаил Николаевич Оверченко Малогабаритная смесительно-зарядная машина для подземных горных работ
RU2668630C2 (ru) * 2015-08-25 2018-10-02 Михаил Николаевич Оверченко Смесительно-зарядная машина для подземных горных работ
RU191307U1 (ru) * 2019-03-06 2019-08-01 Михаил Николаевич Оверченко Адаптер для статического миксера зарядной машины

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US1038806A (en) * 1910-05-26 1912-09-17 Rudolph Welcker Apparatus for handling concrete.
US3380333A (en) * 1963-10-14 1968-04-30 Intermountain Res And Engineer System for mixing and pumping slurry explosives
US3523048A (en) * 1967-11-16 1970-08-04 Hercules Inc Bulk delivery of crosslinkable aqueous slurry explosive with crosslinking agent in a separate feed

Patent Citations (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US827296A (en) * 1904-12-28 1906-07-31 William Thomas Donnelly Apparatus and method for transporting solids.
US1038806A (en) * 1910-05-26 1912-09-17 Rudolph Welcker Apparatus for handling concrete.
US3380333A (en) * 1963-10-14 1968-04-30 Intermountain Res And Engineer System for mixing and pumping slurry explosives
US3523048A (en) * 1967-11-16 1970-08-04 Hercules Inc Bulk delivery of crosslinkable aqueous slurry explosive with crosslinking agent in a separate feed

Cited By (16)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4001060A (en) * 1973-07-19 1977-01-04 Olin Corporation Method for preparing an extrudable priming mixture containing modified karaya gum
US4408886A (en) * 1979-02-02 1983-10-11 Coal Industry (Patents) Limited Mixing equipment
US5686691A (en) * 1995-12-22 1997-11-11 Oea, Inc. Slurry-loadable electrical initiator
US6325572B1 (en) * 1996-10-22 2001-12-04 Frederic Dietrich Process and device for pneumatically conveying powdery substances and their use
US6397719B1 (en) * 1997-09-12 2002-06-04 Dyno Nobel Asa Method for loading slurry explosives in blast holes or cartridges
US8950330B2 (en) 2005-09-19 2015-02-10 Kevin H. Waldock Mobile platform for the delivery of bulk explosive
US7971534B2 (en) * 2005-09-19 2011-07-05 Waldock Kevin H Mobile platform for the delivery of bulk explosive
US20070062406A1 (en) * 2005-09-19 2007-03-22 Waldock Kevin H Mobile Platform for the Delivery of Bulk Explosive
US20150168117A1 (en) * 2005-09-19 2015-06-18 Kevin H. Waldock Mobile Platform for the Delivery of Bulk Explosive
US9267777B2 (en) * 2005-09-19 2016-02-23 Lde Corporation Mobile platform for the delivery of bulk explosive
US10184770B2 (en) 2005-09-19 2019-01-22 Lde Corporation Mobile platform for the delivery of bulk explosive
CN102297641A (zh) * 2011-05-18 2011-12-28 湖北凯龙化工集团股份有限公司 一种粉状震源药柱多管自动装药压盖机
CN112012751A (zh) * 2020-08-24 2020-12-01 中国水利水电第七工程局有限公司 一种缓坡斜井精准开挖方法
CN112012751B (zh) * 2020-08-24 2022-08-16 中国水利水电第七工程局有限公司 一种缓坡斜井精准开挖方法
CN114607398A (zh) * 2022-04-13 2022-06-10 中铁十九局集团轨道交通工程有限公司 一种盾构隧道管片壁后注浆施工方法及装置
RU2825232C1 (ru) * 2023-05-16 2024-08-22 Общество с ограниченной ответственностью "Глобал Майнинг Эксплозив - Раша" Линия приготовления гранулита

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FR2150112A5 (OSRAM) 1973-03-30
DE2239644A1 (de) 1973-03-08
BE787505A (fr) 1973-02-12
GB1382717A (en) 1975-02-05
CA970607A (en) 1975-07-08
ZM12472A1 (en) 1974-04-22

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