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WO2014168495A1 - Cartouche de bourrage pour exploitation minière - Google Patents

Cartouche de bourrage pour exploitation minière Download PDF

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Publication number
WO2014168495A1
WO2014168495A1 PCT/PL2013/000047 PL2013000047W WO2014168495A1 WO 2014168495 A1 WO2014168495 A1 WO 2014168495A1 PL 2013000047 W PL2013000047 W PL 2013000047W WO 2014168495 A1 WO2014168495 A1 WO 2014168495A1
Authority
WO
WIPO (PCT)
Prior art keywords
tamping
plastic
cartridge
mining
properties
Prior art date
Application number
PCT/PL2013/000047
Other languages
English (en)
Inventor
Kamil GÓRSKI
Original Assignee
PRZEDSIĘBIORSTWO PRODUKCYįNO-HANDLOWO-USŁUGOWE
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by PRZEDSIĘBIORSTWO PRODUKCYįNO-HANDLOWO-USŁUGOWE filed Critical PRZEDSIĘBIORSTWO PRODUKCYįNO-HANDLOWO-USŁUGOWE
Priority to PL13724022T priority Critical patent/PL2984441T3/pl
Priority to EP13724022.2A priority patent/EP2984441B1/fr
Priority to PCT/PL2013/000047 priority patent/WO2014168495A1/fr
Publication of WO2014168495A1 publication Critical patent/WO2014168495A1/fr

Links

Classifications

    • 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
    • F42D1/20—Tamping cartridges, i.e. cartridges containing tamping material
    • 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
    • F42D1/24—Tamping methods; Methods for loading boreholes with explosives; Apparatus therefor characterised by the tamping material

Definitions

  • the present invention refers to a tamping cartridge used for packing shot holes, particularly in mining.
  • Known tamping cartridges used for packing shot holes and fixing explosives in shot holes drilled in rock mass, and also for securing explosives against displacement and slipping out have the form of cylindrical and tightly closed containers enclosed in a sheath, with the inside filled in with a mineral plastic material, for example clay, sand, water or a mixture of binding and/or plasticizing and gelling agents.
  • a mineral plastic material for example clay, sand, water or a mixture of binding and/or plasticizing and gelling agents.
  • Polish patent no. PL130369 a tamping cartridge for blocking the position of an explosive in a shot hole, having a fully metallic structure, with a radially and axially displaceable side wall, with displacement achieved by means of slideably interconnected conical elements and identical rings forming a bellows structure.
  • Polish patent no. PL175961 a tamping cartridge in the form of a tube made of formed plastic mass containing a mixture of magnesium, calcium oxide, silicon oxide and plasticizing and gelling agents, enclosed in a thin flexible sheath.
  • Tamping cartridges described by way of examples are used mainly in mining of minerals by blasting, as this is where relatively short holes are drilled in longwall, where an explosive is placed and blocked effectively by a tamping cartridge to prevent material ejection through this hole during an explosion.
  • Problems occur when very long (several or dozen meter long) holes are made in roofs or longwalls in order to decompress and relax rock mass in the conditions posing a risk of rockburst, roof fall, methane explosion or in order to loosen compact or unmineable rock.
  • tamping cartridges as described in patent document PL 175961 are used.
  • using such cartridges is always connected with difficult movement of these cartridges along the long hole until they reach an explosive at its bottom. While moving and ramming such a cartridge, it often gets damaged or torn even before reaching an explosive, thus creating a blockage.
  • a tamping cartridge structure for sealing especially long shot holes in the form of a long tubular shape enclosed in an external sheath filled in with plastic material, e.g. clay, sand, water or a mixture of binding and plasticizing and gelling agent, where the external sheath of the cartridge is composed of multiple layers and consists of, consecutively from the outside, a first paper layer, advantageously normal sulfite paper, class III of a grammage of up to 90g/m 2 and a thickness of up to 0.2 mm, a second glue layer, a third antistatic polyethylene foil layer of a thickness of 0.1 to 0.3 mm and stretchability of 150% to 250%, favorably 200%, a fourth glue layer and a fifth paper layer.
  • a foil layer can be replaced with barrier paper saturated with moisture impervious material, and additionally, there can be an additional sixth layer of glue and a seventh layer of paper in between the fourth and the fifth layer.
  • Tamping cartridges for fixing blasting explosives are filled in with a plastic material, physical and usage properties of which are adjustable to a broad extent. Given the fact that a tamping cartridge must be characterized by appropriate stiffness and elasticity, specific deformability, moderate load flow properties having a decisive impact on retaining a cartridge shape in a shot hole, shot hole filling and no tendency for displacement with simultaneous deformability while fixing in a shot hole, it has been found that for practical reasons tamping cartridges filled in with a material having specific rheological properties are particularly favorable. Such rheological properties as load flow, plasticity and elasticity make it possible to explicitly define the consistency and usage properties of mineral materials used as fillers for tamping cartridges. These properties, to a large extent, depend on multiple factors such as filler grain distribution and specific filler fractions content, and also moisture content.
  • Liquidity index (l L ) is a measure of plastic properties of a mineral filler of a tamping cartridge, indicating how much moisture is absorbed by this material while transforming from semi-solid to liquid state, that is it defines a moisture range in which said material has plastic properties.
  • Liquid limit (w L ) represents moisture of a plastic mineral filler of a tamping cartridge, at the boundary between soft and liquid state. It is assumed that liquid limit represents water content of material at which a groove made in a paste of this soil and put in the cup of the Casagrande's liquid limit device closes the flow at the length of 10 mm and height of 1 mm in 25 blows in the measurement conditions as defined in Polish standard PN-88/B-04481.
  • Plastic limit (W P ) stands for the value of stress at which irreversible plastic deformations occur. It is a measure of moisture content of a material at the boundary between semi-solid and stiff state. With this moisture, a thread made of this material, while rolling on the palm, breaks after reaching a diameter of 3 mm or, when lifted by one end, breaks apart.
  • the area between elastic limit and plastic limit represents an area of partial elasticity (or partial plasticity). Plastic limit is often connected with material strength.
  • Plasticity index (l L ) is a measure of plastic properties of a mineral filler of a tamping cartridge, indicating how much moisture is absorbed by this material while transforming from semi-solid to liquid state, so it defines a moisture range in which said material has plastic properties.
  • the present invention refers to a tamping cartridge in the form of a cylinder or a cone with an external, at least single-layer closed sheath filled in with a mass of moist fine mineral plastic material, with 67 % to 99 % by weight of a grain fraction from 0.5 um to 5 mm, up to 11% by weight of grain fraction of over 5 mm and a natural moisture (W n ) from 3% to 63 %, and liquidity index (l L ) not higher than 0.300 and plasticity index (l P ) from 20% to 25 %.
  • a tamping cartridge according to the invention shows stability in mining conditions and is to be used for securing blasting explosives in shot holes characterized by large inclination.
  • Embodiments show the properties of fine plastic mineral material being a filler for tamping cartridges according to the invention. ⁇
  • Moisture content was determined according to item 5.1 of Polish standard PN88/B-04481.
  • Plastic limits W p and liquid limits W L were defined according to items 5.5 and 5.6. of said standard, respectively.
  • specimens comprised fine plastic mineral material being a filler for tamping cartridges according to the invention.
  • the table 1 shows properties of different types of fine plastic mineral material used as a filler for tamping cartridges according to the invention.
  • Test tamping cartridges according to the invention were filled in with a plastic material having the properties as shown in the table, and then were subjected to usage tests in mining conditions. As a result of tests, all tamping cartridges for mining showed favorable usage properties comprising appropriate deformability without damage, fill capacity and fitting into a shot hole and capability of retaining position in shot holes of a significant inclination of up to 75°.

Landscapes

  • Life Sciences & Earth Sciences (AREA)
  • General Life Sciences & Earth Sciences (AREA)
  • Engineering & Computer Science (AREA)
  • General Engineering & Computer Science (AREA)
  • Investigating Strength Of Materials By Application Of Mechanical Stress (AREA)

Abstract

L'invention concerne une cartouche de bourrage utilisée pour garnir des trous de mine, en particulier dans une exploitation minière. Une cartouche de bourrage possède une forme de cylindre ou de cône dotée d'une gaine fermée au moins monocouche externe remplie d'une masse de matière plastique minérale fine humide, le matériau contenant de 67 % à 99 % en poids d'une fraction de grain de 0,5 µm à 5 mm, jusqu'à 11 % en poids d'une fraction de grain de plus de 5 mm et possédant une humidité naturelle (Wn) de 3 % à 63 %, et un indice de liquidité (lL) inférieur ou égal à 0,300 et un indice de plasticité (lP) de 20 % à 25 %.
PCT/PL2013/000047 2013-04-10 2013-04-10 Cartouche de bourrage pour exploitation minière WO2014168495A1 (fr)

Priority Applications (3)

Application Number Priority Date Filing Date Title
PL13724022T PL2984441T3 (pl) 2013-04-10 2013-04-10 Przybitka górnicza
EP13724022.2A EP2984441B1 (fr) 2013-04-10 2013-04-10 Cartouche de bourrage pour exploitation minière
PCT/PL2013/000047 WO2014168495A1 (fr) 2013-04-10 2013-04-10 Cartouche de bourrage pour exploitation minière

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
PCT/PL2013/000047 WO2014168495A1 (fr) 2013-04-10 2013-04-10 Cartouche de bourrage pour exploitation minière

Publications (1)

Publication Number Publication Date
WO2014168495A1 true WO2014168495A1 (fr) 2014-10-16

Family

ID=48468740

Family Applications (1)

Application Number Title Priority Date Filing Date
PCT/PL2013/000047 WO2014168495A1 (fr) 2013-04-10 2013-04-10 Cartouche de bourrage pour exploitation minière

Country Status (3)

Country Link
EP (1) EP2984441B1 (fr)
PL (1) PL2984441T3 (fr)
WO (1) WO2014168495A1 (fr)

Citations (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
ZA771974B (en) 1976-04-01 1978-03-29 Du Pont Tampable chub cartridge
GB2035519A (en) * 1978-11-30 1980-06-18 Kalk Chemische Fabrik Gmbh Tamping cartridge and use thereof in drilled holes
CA1106234A (fr) 1977-07-14 1981-08-04 Aeci Limited Cartouche explosive a bourrer
PL130369B2 (en) 1981-01-19 1984-07-31 Soc Bourguignonne D'applications Plastiques Sa Wadding for sealing blast-holes
PL175961B1 (pl) 1995-04-01 1999-03-31 Przed Explominex Sp Z Oo Przybitka górnicza i sposób wytwarzania przybitki górniczej
PL386649A1 (pl) 2008-12-01 2010-06-07 Kamil Górski Przybitka górnicza do uszczelnienia otworów strzałowych, zwłaszcza długich otworów

Patent Citations (7)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
ZA771974B (en) 1976-04-01 1978-03-29 Du Pont Tampable chub cartridge
CA1106234A (fr) 1977-07-14 1981-08-04 Aeci Limited Cartouche explosive a bourrer
GB2035519A (en) * 1978-11-30 1980-06-18 Kalk Chemische Fabrik Gmbh Tamping cartridge and use thereof in drilled holes
GB2035519B (en) 1978-11-30 1982-07-14 Kalk Chemische Fabrik Gmbh Tamping cartridge and use thereof in drilled holes
PL130369B2 (en) 1981-01-19 1984-07-31 Soc Bourguignonne D'applications Plastiques Sa Wadding for sealing blast-holes
PL175961B1 (pl) 1995-04-01 1999-03-31 Przed Explominex Sp Z Oo Przybitka górnicza i sposób wytwarzania przybitki górniczej
PL386649A1 (pl) 2008-12-01 2010-06-07 Kamil Górski Przybitka górnicza do uszczelnienia otworów strzałowych, zwłaszcza długich otworów

Also Published As

Publication number Publication date
EP2984441A1 (fr) 2016-02-17
PL2984441T3 (pl) 2017-07-31
EP2984441B1 (fr) 2017-03-15

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