drilling pattern in underground mines in Philippines

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  • Drilling patterns - QueensMineDesignWiki

    2019-6-28 · This drill pattern uses a series of parallel holes are drilled closely spaced at right angles to the face. This results in the deepest excavation possible with the choice equipment and is therefore the most common drill pattern used where the rock mass allows.

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  • Diamond Drilling Corporation of the Philippines

    2016-5-13 · DDCP is a wholly owned subsidiary of Lepanto Consolidated Mining Company, one of the oldest mining companies in the Philippines. It was incorporated on August 8, 1971 and was established to initially serve LCMC’s drilling requirements. Over the years, it …

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  • Underground Drilling - International Mining

    2012-6-1 · Oldenburg Mining offers a complete line of drill jumbos for applications in underground face drilling and benching. Doug Wilson, Director of Marketing told IM: “The modular product offering is designed to meet the unique challenges of each mine – from manoeuverability and air quality to operator convenience and safety.” Its recently expanded line of drill jumbos includes two new models – the …

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  • Drilling Pattern, Blasting Design Types used In U/G

    2020-6-16 · Drilling Pattern in Underground Coal Mines In this Post We Cover drilling pattern in underground coal mines and all 7 types of blasting design patterns like wedge cut drilling pattern, pyramid cut drilling pattern, burn cut drilling pattern, cone cut, ring cut drilling pattern, drag cut drilling pattern, fan cut drilling pattern, cormorant cut all of them blasting design.

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  • Underground Drilling: Best Practice, Better Tools

    2021-7-5 · Drilling can be done from the surface or from the drift in the underground mine. A drill bit studded with small diamonds cuts a cylindrical core that is …

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  • Techniques in Underground Mining - ILO

    2011-12-1 · A total of 550 m conventional drill and blast development on No 2 seam will open up the mining area and connect the shafts with each other, with 4,660 m of coal cutting on No 4 seam being ...

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  • Underground Mine Development - MINING.COM

    2019-4-21 · shorten the work time. Drilling and blasting cost in open pit mines represent 15-20% of the total mining cost [1,2,3]. Apart from the direct costs, blasting efficiency also influences down the line mining costs. Firing pattern that provides a pathway for the detonation wave of initiation for the explosive charged in the holes. In any

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  • Diamond Drilling Corporation of the Philippines

    2016-5-13 · DDCP is a wholly owned subsidiary of Lepanto Consolidated Mining Company, one of the oldest mining companies in the Philippines. It was incorporated on August 8, 1971 and was established to initially serve LCMC’s drilling requirements. Over the years, it …

    Get Price
  • Underground Drilling - International Mining

    2012-6-1 · In this month’s Spotlight Feature Article, from the pages of the June 2012 issues of International Mining, Editor Paul Moore reports that Underground Drilling remains a challenging environment, so continued improvements from key machine and component suppliers continues to help mines improve efficiency, particularly as operations go deeper.

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  • FIRING PATTERNS AND ITS EFFECT ON MUCKPILE SHAPE ...

    2019-4-21 · Drilling and blasting cost in open pit mines represent 15-20% of the total mining cost [1,2,3]. Apart ... A is situated in Philippines and belongs to the Lafarge cement company, Quarry-B belongs to Ambuja cement, Rajasthan, ... Staggered drilling with V-firing pattern (Blast AB-12) LINE OF FRACTURES Staggered drilling with diagonal firing

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  • Techniques in Underground Mining - ILO Encyclopaedia

    2021-7-5 · In mechanized mines, two-boom, electro-hydraulic drill jumbos are used for face drilling. Typical drift profiles are 16.0 m 2 in section and the face is drilled to a depth of 4.0 m. The holes are charged pneumatically with an explosive, usually bulk ammonium nitrate …

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  • Peculiarities of drilling and blasting in underground ...

    Technical aspects of drilling and blasting in these mines have already been documented by Sec catore et al. 2014b. Other economic and strategic aspects of the mines of this area are described in detail in Sec catore et al., 2013 and Marin et al., 2016 and Sandoval, 2001 SANDOVAL, F. La pequeña minería en el Ecuador. London: IIED, WBCSD, 2001.

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  • Drilling Parameters and Their Application in Mining and ...

    2015-12-16 · of drilling, date and time of end of drilling, incidents, lengths drilled, pitch tilt (X, Y), etc.); • safety for development in the tunnel through prevention and detec-tion of geotechnical problems during progress; and • rationalization of the blasting pattern for ore extraction (distribu-tion and type of …

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  • Blast Hole Drilling: The Basic Process | RPM Drilling

    2021-7-12 · Geotechnical Considerations in Underground Mining/Department of Industry and Resources Guideline Document No.: ZME723QT 1.0 INTRODUCTION The potentially hazardous nature of underground mining requires the application of sound geotechnical engineering practice to determine the ground conditions, the ground support and reinforcement requirements, as well as the size, shape and …

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  • Geotechnical considerations in underground mines

    2019-2-4 · Although underground mining is a less environmentally-destructive means of gaining access to an ore deposit, it is often more costly and entails greater safety risks than strip mining, including open-pit mining. While most large-scale mining projects involve open-pit mining, many large underground mines are in operation around the world.

    Get Price
  • Drilling and blasting powerpoint 2003 - SlideShare

    2015-12-16 · of drilling, date and time of end of drilling, incidents, lengths drilled, pitch tilt (X, Y), etc.); • safety for development in the tunnel through prevention and detec-tion of geotechnical problems during progress; and • rationalization of the blasting pattern for ore extraction (distribu-tion and type of …

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  • Drilling Parameters and Their Application in Mining and ...

    2021-7-12 · Geotechnical Considerations in Underground Mining/Department of Industry and Resources Guideline Document No.: ZME723QT 1.0 INTRODUCTION The potentially hazardous nature of underground mining requires the application of sound geotechnical engineering practice to determine the ground conditions, the ground support and reinforcement requirements, as well as the size, shape and …

    Get Price
  • Geotechnical considerations in underground mines

    2009-8-26 · drilling. Thechange tovertical holes isdiscussed in some detail in the next section ofthis paper. By1972, however, the pattern forfresh car-bonatite, phoscorite, andpyroxenite was standardized at 6,7m burden and7,3mstaggered spacing, drilling vertical holesto2,1mbelow bench grade. For dolerite dyke, the same pattern gave excellent results be-

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  • Thedevelopment ofdrilling andblasting practice

    Technical aspects of drilling and blasting in these mines have already been documented by Sec catore et al. 2014b. Other economic and strategic aspects of the mines of this area are described in detail in Sec catore et al., 2013 and Marin et al., 2016 and Sandoval, 2001 SANDOVAL, F. La pequeña minería en el Ecuador. London: IIED, WBCSD, 2001.

    Get Price
  • Peculiarities of drilling and blasting in underground ...

    The drilling tool (a bit and bamboo rods) was lowered into the hole on cables 1-4 cm thick, which were spun from rattan. The first holes drilled in Russia date to the ninth century A.D. and were for the extraction of common salt (Staraia Russa). Salt mines were subsequently developed in Balakhna (12th century) and in Solikamsk (16th century).

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  • Drilling | Article about Drilling by The Free Dictionary

    2017-5-2 · marking and drilling of the blast-holes and the proper charging and timing of the blast round. The initial development blast pattern for the 1.2 m by 1.5 m raise was based on a 15 blast-hole pattern. Based on the rock conditions and observed fragmentation the blast round was modified to a 13-hole pattern. Subsequently, the 5-hole burn

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  • v117n4a1 Introduction of drill and blast utilizing ...

    2017-5-9 · 29 APRIL - 01 MAY 2014 | ROYAL ON THE PARK, BRISBANE, QLD, AUSTRALIA W: www.drillandblastevent.com.au • T: +61 (2) 9229 1000 • E: [email protected] 2 INTRODUCTION With an increased industrial focus on cost reduction and operational effi ciency in

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  • BEST PRACTICES IN DRILL AND BLAST - IQPC Corporate

    2016-4-21 · Ideally, most coal mines want to have a small amount of hard toe by standing off the coal by a small amount. This protects the coal seam during the blast, avoiding dilution of the overburden material with the coal seam. Drilling to elevation is also important when the …

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  • The hole story: the benefits of drill and blast |

    Holes drilled can be vertical, angled (Ray 2004) or deviated as per need. In seam drilling can also be carried out from the surface by deviated drilling. See figure opposite. Surface drainage generally involves drilling boreholes on a grid pattern from the surface to the coal seam. The spacing between the holes varies between 250-500m.

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  • Drilling and Blasting | Technical Aspects of Mining ...

    Drilling. Most blasting in mines involves charging explosives into holes drilled in rock. The entrance or mouth of a drill hole is called the collar and the end is the toe. Drilling is still carried out in some cases, in the ASM sector, by hand, using a hammer and chisel. This is obviously tedious and slow, especially in hard-rock mining ...

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  • Drilling, Charging and Blasting Productivity

    Coal mines are susceptible to fume when sleeping large blasts in soft, weathered and wet sedimentary rock. In response to industry demand, Orica has developed a complete Fume Risk Reduction protocol that takes a holistic view on the blasting operation to seek and control the many possible causes of fume without affecting productivity, and in ...

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  • Rocking support drilling - Solid Ground : Solid Ground

    2020-7-6 · As the company’s first battery-powered rock bolter, Sandvik DS412iE extends the zero emissions concept to the underground rock bolter class and opens up a wide range of possibilities for mines driven to boost their productivity and safety with data-based analytics.

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  • Designing Blast Patterns Using Empirical Formulas

    2014-4-2 · BUREAU OF MINES E1burt F. Osborn, Director . This publication has been cataloged as follows: ... Empirical formulas that may be applied to drilling and blasting pattern design..... 6 Calculation of burden, B, from equation 1 ...

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  • The hole story: the benefits of drill and blast |

    2016-4-21 · Ideally, most coal mines want to have a small amount of hard toe by standing off the coal by a small amount. This protects the coal seam during the blast, avoiding dilution of the overburden material with the coal seam. Drilling to elevation is also important when the …

    Get Price
  • 1.1 PHASES OF A MINING PROJECT - Home | ELAW

    2019-2-4 · Although underground mining is a less environmentally-destructive means of gaining access to an ore deposit, it is often more costly and entails greater safety risks than strip mining, including open-pit mining. While most large-scale mining projects involve open-pit mining, many large underground mines are in operation around the world.

    Get Price
  • Mining robots: Rio Tinto doubles down on

    Most mines that carry out gas drainage for whatever purpose utilize a surface 'gas drainage plant' which consists of vacuum pumps (with ancillary equipment) attached to an underground gas pipe reticulation system usually via boreholes. The vacuum has a minimal effect on the effectiveness of gas flow from the coal – the gas is frequently ...

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  • Drainage Methods | Introduction | underground COAL

    2021-7-12 · The power available underground may be electricity at 440/550 volts, or compressed air (in most of the metalliferous mines). Flame proof diesel engines are rarely employed as power sources. At some underground working places the water supply for drilling may be on a very limited scale and not as plentiful as on the surface.

    Get Price
  • Rocking support drilling - Solid Ground : Solid Ground

    2020-7-6 · As the company’s first battery-powered rock bolter, Sandvik DS412iE extends the zero emissions concept to the underground rock bolter class and opens up a wide range of possibilities for mines driven to boost their productivity and safety with data-based analytics.

    Get Price
  • Designing Blast Patterns Using Empirical Formulas

    2014-4-2 · BUREAU OF MINES E1burt F. Osborn, Director . This publication has been cataloged as follows: ... Empirical formulas that may be applied to drilling and blasting pattern design..... 6 Calculation of burden, B, from equation 1 ...

    Get Price
  • Mining robots: Rio Tinto doubles down on

    Coal mines are susceptible to fume when sleeping large blasts in soft, weathered and wet sedimentary rock. In response to industry demand, Orica has developed a complete Fume Risk Reduction protocol that takes a holistic view on the blasting operation to seek and control the many possible causes of fume without affecting productivity, and in ...

    Get Price
  • Drilling, Charging and Blasting Productivity

    2021-7-2 · This Mines Occupational Safety and Health Advisory Board (MOSHAB) Guideline offers advice on the issues that should be addressed when open pit mines are excavated through abandoned underground workings, or in close proximity to current underground workings. Comments on, and suggestions for, improvements to the Guideline are encouraged.

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  • OPEN PIT MINING THROUGH UNDERGROUND WORKINGS

    A new pattern of underground space‐time tridimensional gas drainage: A case study in Yuwu coal mine, China. Yankui Li. ... Kilometer drilling rig (km drilling rig), also known as Horizontal directional drilling ... the roof strata and the floor strata, which provides detailed coal recovery data. Although widely applied in gassy mines, the ...

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  • A new pattern of underground space‐time

    Jumbo - A development drilling rig used in underground rock mines. Laser Level/Staff - A survey instrument used to check levels. Level - A main underground passage or roadway system. Loaded Shot - Drill holes loaded with explosive. Longwall - A method of extracting coal on a continual mining face working between roadways.

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  • Mine Surveyor.net - Mining and Mine Surveying Basic

    2021-7-12 · The power available underground may be electricity at 440/550 volts, or compressed air (in most of the metalliferous mines). Flame proof diesel engines are rarely employed as power sources. At some underground working places the water supply for drilling may be on a very limited scale and not as plentiful as on the surface.

    Get Price
  • Types of Drilling Methods used in Mining | Boring |

    2012-10-20 · Blasting gallery (BG) method is a French technique for exploitation of thick coal seam of underground degree-I gassy coal mines. By this method, the coal of entire seam thickness can be excavated in one lift by drilling a set of holes in a ring pattern with coal recovery ranging from 65 to 85 %.

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  • A New Blastability Index for Hard Roof Management

    2003-6-1 · Quality assurance in ground control management requires that blasting activities should be carried out according to existing procedures. Blasting procedures should specify type of explosives, blast hole parameters, charging method, a system of initiation and a system of reporting misfires.

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