powder factor li ne mines

powder factor li ne mines

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  • How do you calculate powder factor

    Sep 13, 2010· Powder Factor is the relationship of Explosives to Volume It describes how much explosives are needed to blast a particular volume of rock The easy formula is ,...

  • Drilling and blasting

    Drilling and blasting is the controlled use of explosives and other methods such as gas pressure blasting pyrotechnics, to break rock for excavationIt is practiced most often in mining, quarrying and civil engineering such as dam, tunnel or road constructionThe result of rock blasting is often known as a rock cut Drilling and blasting currently utilizes many different varieties of ....

  • Chapter 8 BLAST DESIGN

    Chapter 8 BLAST DESIGN (Figure 8-2) Staggered pattern (Figure 8-3) Sing , The higher the powder factor, the lighter the load Lower powder factor means more explosiv Example: , The economic analysis of the use of explosives is an important part of blasting operations in mining and construction Explosives are energy, and the efficient ....

  • Rock blasting for mining

    Jul 28, 2017· Rock blasting for mining 1 1 ROCK BLASTING FOR MINING by Prof A Balasubramanian Centre for Advanced Studies in Earth Science University of Mysore Mysore-6 2 2 Objectives: You are all aware that Mining is a major economic sector of any country Mining is a geotechnical industry...

  • Power factor

    The power factor is defined as the ratio of real power to apparent power As power is transferred along a transmission line, it does not consist purely of real power that can do work once transferred to the load, but rather consists of a combination of real and reactive power, called apparent power...

  • Blasting

    View an extensive list of blasting resources (ARblast) Blasting is an integral part of surface mining operations To uncover coal reserves, the rocks overlying the coal are broken with explosives and excavated with various types of large earth-moving equipment...

  • powder factor limestone mines

    powder factor li ne mines - chicshocoza powder factor limestone mines The Gulin product line SANU LIMESTONE MINES Powder factor varies between 6-8 te of rock per Kg of explosive Blasting , Study on optimum powder factor and quality of explosives , The optimum powder factor in most of mines in CIL was recorded ....

  • The mine planning process for an open

    The mining functions at Letseng are carried out by contractors accounting for more than 70% of the total mining cost Unit mining costs for ore are higher than those of waste owing to a tighter blast pattern for ore, resulting in higher powder factors and higher drilled metr A mining cost adjustment factor (MCAF) for each block is set as a ....

  • Appendix E6

    x 85m pattern should be used with a powder factor of 096kg/m3 At an average rock density of 277 tonnes/m3 this equates to a powder factor of 035 kg/tonne This is similar to other large open pit projects in the KSM area SABREX simulations show that this powder factor results in fragmentation with 80% passing 056m particle size The maximum...

  • Blasting off

    Increasing average powder factor and total pull under blasting off-the-solid (BOS) are the prime necessities of the coal mining industry because of the stagnating production in BOS during the last three decades from underground coal mining While maximum charge of 1000 g per shot hole has so far been allowed by the DGMS in degree I coal mines, only 565 g is allowed for solid blasting in higher ....

  • DASHBOARD

    increasing trend line shows that over several months the explosive consumption of the mine has increased This can be attributed to the mine encountering hard geology/strata for which they might have to consider using higher quantity of explosiv Also Powder factor is a key performance indicator for any mine...

  • H BLASTING IN SURFACE EXCAVATION

    Powder factor or specific charge or blasting ratio: This is the ratio between the mass of explosives required to break a given quantity of rock and is normally expressed in kg/m3 or kg/t3 Table 1 is a guide to the powder factor for a given type of explosive in various types of rock...

  • Selection of Powder Factor in Large

    Selection of Powder Factor in Large-Diameter Blast Holes by Jack Eloranta 1995 Abstract This paper documents the relationship between material handling and processing costs compared to blasting cost The old adage, "The cheapest crushing is done in the pit", ,...

  • Powder Factor

    Jul 16, 2018· Powder factor is expressed in many different forms Essentially it is a measurement of explosives per quantity of rock The typical variation of this that we use on a daily basis is how many pounds of explosives per cubic yard of rock This gives us a baseline of how we need to go about fragmenting rock for each particular application...

  • Powder Factor

    Powder Factor is defined as the amount of explosive required to dislodge and fragment 1 cubic yard of rock [3] The softer (less dense) the material that is being blasted; the smaller the powder factor Blastability Index (BI) is a variable calculated from the rock mass description (RMD), location of any cracks or weaknesses (referred to as ....

  • Evaluating the effectiveness of powder factor

    Jun 12, 2019· Powder factor design fell out of favor in the 1870s with the widespread use of dynamite, but it made a comeback in the 1950s due to simplicity of use for blasters working for explosive companies that had to quickly and simply design blasts in the field Since then, a number of engineers have studied powder factor and its effects on rock breakage...

  • recomended powder factor mining

    assessment of powder factor in surface bench blasting using , Tech Student, Department of Mining Engineering, Indian School of Mines, Dhanbad-826004, , reliable to enable the determination of optimum powder factor for surface bench , Test Procedure: 2- Hucka [10] recommended that the peak More details » Get Price...

  • Fragmentation

    Mining news and job postings, mining and mineral processing technology including drilling, blasting, mining methods, equipment, backfill , and design variables are combined using five underlying equations in this modern version of the Kuz-Ram fragmentation model , K = powder factor (kg explosive / cubic m rock) Qe = charge weight (kg)...

  • (PDF) Optimization of Blasting Parameters

    powder factor i s calculated af ter all blast parameters have been determined to assist in calculating the total amount of explosives used in a blast...