CONTACT US

Our Address

Science Avenue, High-tech Zone, Zhengzhou City, Henan Province, China

  • Drilling and Blasting Technical Aspects of Mining ...

    Blasting in a mine generally occurs in two phases, primary blasting and secondary blasting. Blasting Primary Blasting is the activity in which in-situ rock is broken in both development and stoping and in surface mining by drilling holes in the rock, charging them with explosives and detonating the holes in a planned sequence.

  • (PDF) Blasting and Mining - ResearchGate

    Surface mine drilling is accomplished using both rotary and. ... Ring drilling and blasting is done from a series of sub level drill drifts. ... detonation process, radial shaped charge jets [10 ...

  • Drilling and blasting - Wikipedia

    OverviewHistoryProcedureRock supportSee alsoExternal links

    Drilling and blasting is the controlled use of explosives and other methods such as gas pressure blasting pyrotechnics, to break rock for excavation. It is practiced most often in mining, quarrying and civil engineering such as dam, tunnel or road construction. The result of rock blasting is often known as a rock cut. Drilling and blasting currently utilizes many different varieties of explosives with different compositions and performance properties. Higher velocityexplosives are used for relatively har

  • 选择时,新内容将添加到焦点当前区域上方

    Drilling and blasting is the controlled use of explosives and other methods such as gas pressure blasting pyrotechnics, to break rock for excavation. It is practiced most often in mining, quarrying and civil engineering such as dam, tunnel or road construction. The result of rock blasting is often known as a rock cut. Drilling and blasting currently utilizes many different varieties of explosives with different compositions and performance properties. Higher velocityexplosives are used for relatively hard rock in order to shatter an

    Wikipedia CC-BY-SA 许可下的文字
  • Mine Drilling Blasting And Detonation

    Mine drilling blasting and detonation of the technology and the practical appliion of bench blasting detonation delaying, mine drilling2cblasting detonation drilling and blasting wikipedia drilling and blasting is the controlled use of explosives and other methods such as gas pressure blasting pyrotechnics, it is practiced most often in mining,.

  • Let's Blast! - Industrial Explosives During Blasting # ...

    Sep 12, 2018  • Blasting experience of the mine, • Delay systems, powder factor, and pounds per delay, • Type and amount of explosive material, and • Type and amount of stemming. #blasting #mining # ...

  • 作者: Clickmind
  • Blasting Injuries in Surface Mining with Emphasis on ...

    The mining industry considers blasting an essential component for the success of their operations. 1.1. Explosives used in surface mine blasting More than 90% of the domestic explosive and blasting agent formulations generally used are ammonium nitrate (AN) based (USGS, 2000). A mixture of ammonium nitrate and fuel oil,

  • Rock Fracture and Blasting ScienceDirect

    Abstract. Stress waves can be found in rock drilling, rock blasting, mining-induced seismicity, and other dynamic events. By means of stress wave theory, we can improve the quality and productivity of current rock drilling, rock blasting, and mining production; reduce natural resource loss; improve fieldwork safety; and reduce the damage to the environment caused by blasting.

  • Chapter 8 BLAST DESIGN

    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 use of this energy is a major factor in keeping rock blasting costs under control. High-energy explosives enhance fragmentation, which ultimately produces a positive effect on production ...

  • Explosives Signs for drilling and blasting industry.

    Signs for the drilling blasting industry . We have a full line of signage for the Explosives industry. We carry Danger signs, DOT Placards, IME, Traffic, and stands.

  • Rock Fracture and Blasting ScienceDirect

    Abstract. Stress waves can be found in rock drilling, rock blasting, mining-induced seismicity, and other dynamic events. By means of stress wave theory, we can improve the quality and productivity of current rock drilling, rock blasting, and mining production; reduce natural resource loss; improve fieldwork safety; and reduce the damage to the environment caused by blasting.

  • Chapter 8 BLAST DESIGN

    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 use of this energy is a major factor in keeping rock blasting costs under control. High-energy explosives enhance fragmentation, which ultimately produces a positive effect on production ...

  • Explosives Signs for drilling and blasting industry.

    Signs for the drilling blasting industry . We have a full line of signage for the Explosives industry. We carry Danger signs, DOT Placards, IME, Traffic, and stands.

  • Blasting precautions you must take - Pit Quarry : Pit ...

    Oct 24, 2018  Blasting is essential to the mining industry. Explosives provide the energy to break and loosen the rock necessary for processing. To effectively blast rock, a tremendous amount of energy must be released in a very short period of time.

  • DRILLING AND BLASTING IN HARD ROCK NARROW

    THE STATE OF OUR CURRENT KNOWLEDGE OF MARKING, DRILLING, CHARGING AND BLASTING • The quality of marking, drilling, charging and blasting affects the mining cycle from the face to the mill. • There is a need for comprehensive, experiential training to equip people for these jobs.

  • (PDF) METHOD FOR CALCULATION OF DRILLING-AND-BLASTING ...

    A new method has been developed for calculation of drilling-and-blasting operations parameters during mining with emulsion explosives application, which results in minimization of energy ...

  • New trends in drilling and blasting technology ...

    The mining industry is poised on the threshold of some exciting opportunities. It has been realized that the unit operations such as drilling, blasting, excavation, loading, hauling and crushing are interrelated variables in the total cost equation.

  • Using drones for drilling and blasting : Pit Quarry

    Jul 28, 2017  Yet with drilling, blasting and exacting of ore accounting for between 30 and 40 percent of operational costs at an open pit mine, mining professionals will be excused if they find the idea of refining the drilling and blasting process using an automated unmanned aerial vehicle just as awesome as the biggest, loudest explosion in a summer ...

  • Dangers of Toxic Fumes from Blasting

    surroundings absorb sufficient energy from the explosion front to quench the detonation. Bulk-loaded blasting agents used in large-scale surface mine blasting do not detonate properly in boreholes of 1-inch diameter or less (ISEE, 1998). If the blasting agent is diluted by mixing with drill cuttings at the top or

  • H BLASTING IN SURFACE EXCAVATION - Mining and Blasting

    Shaped charges are sometime used in secondary blasting, but this is much more expensive. Cast Blasting When overburden is removed from a coal or mineral deposit it is generally cast to a waste dump by draglines, or removed by loaders and trucks. Cast blasting is the controlled placement of

  • Blasting in Underground Coal Mines

    •Continuous mining equipment has escalated coal production and introduced more effective and efficient coal handling facilities. •Traditional drilling and blasting methods are no longer employed as the primary means of breaking coal in Australia, when mining has reached the coal seam.

  • PROCEDURES FOR BLASTING

    Airblast - The airborne shock wave generated by an explosion. ANFO – A blasting agent composed primarily of ammonium nitrate and fuel oil. Authorized Blasting Assistant – An individual who has been authorized by the certified blaster-in-charge to work on a blasting operation after such blaster-in-charge has confirmed that the

  • Blast Hole Drilling: The Basic Process RPM Drilling

    Blasting Techniques and Methods Used Technique #1 – Open mine blasting. Open pit mining refers to mining minerals from, as the name suggests, an open pit; or may refer to any similar shallow mining operation. Open mine blasting plays a pivotal role in determining the needs of all other mining activities to

  • DRILLING AND BLASTING - Mining Technology

    Aug 20, 2018  Course Outcomes: Drilling and blasting is primary operation in any mining organization, student understands various methods of drilling, design and selection of drilling methods. Knowledge about explosives and blasting techniques makes student confident in design of blasting

  • H BLASTING IN SURFACE EXCAVATION - Mining and Blasting

    Shaped charges are sometime used in secondary blasting, but this is much more expensive. Cast Blasting When overburden is removed from a coal or mineral deposit it is generally cast to a waste dump by draglines, or removed by loaders and trucks. Cast blasting is the controlled placement of

  • Blasting in Underground Coal Mines

    •Continuous mining equipment has escalated coal production and introduced more effective and efficient coal handling facilities. •Traditional drilling and blasting methods are no longer employed as the primary means of breaking coal in Australia, when mining has reached the coal seam.

  • PROCEDURES FOR BLASTING

    Airblast - The airborne shock wave generated by an explosion. ANFO – A blasting agent composed primarily of ammonium nitrate and fuel oil. Authorized Blasting Assistant – An individual who has been authorized by the certified blaster-in-charge to work on a blasting operation after such blaster-in-charge has confirmed that the

  • Blast Hole Drilling: The Basic Process RPM Drilling

    Blasting Techniques and Methods Used Technique #1 – Open mine blasting. Open pit mining refers to mining minerals from, as the name suggests, an open pit; or may refer to any similar shallow mining operation. Open mine blasting plays a pivotal role in determining the needs of all other mining activities to

  • DRILLING AND BLASTING - Mining Technology

    Aug 20, 2018  Course Outcomes: Drilling and blasting is primary operation in any mining organization, student understands various methods of drilling, design and selection of drilling methods. Knowledge about explosives and blasting techniques makes student confident in design of blasting

  • Social Distancing in Mining Academy Blasting

    Dr. Anthony Konya is an explosive engineer with worldwide experience in drilling and blasting for surface, underground, and underwater blasting projects. Anthony has extensive experience in blast design, ground vibration, air overpressure, unintentional detonation of explosives, effects of explosives on structures and has applied these skills ...

  • Rotary Drilling and Blasting in Large Surface Mines - 1st ...

    In large surface mining operations, drilling and blasting activities constitute more than 15% of the total costs. In order to optimize performance and minimize costs, a thorough knowledge of drill and blast operations is, therefore, extremely important. In this unique reference volume, rotary blasth

  • Evaluation and optimization of blasting approaches to ...

    1. Introduction. At present, drilling equipment with 200-mm hole diameter and above is widely used in large open-pit mine. The blasthole diameter has significant effect on rock fragmentation, since it is the primary blast design parameter and has influence on the choice of burden, spacing, stemming length, etc. , , .In order to choose the proper blasthole size for bench blasting, Dick Olson ...

  • Mine Drilling Blasting And Detonation

    Blasting and mining . Raleke Chinedu Ring drilling and blasting is done from a series of sub level drill drifts. detonation process, radial shaped charge jets [10-11] are formed. explosives Mining and Blasting. Jun 14, 2018 Benefits of Inclined Drilling in Surface Mining: In Bench Blasting, inclined drilling extends numerous benefits.

  • risk assessment on drilling and blasting

    Guidance for carrying out risk assessment at surface mining ... - HSE. Mar 25, 1999 ... Risk assessment is all about prevention of accidents and there is a need to be .... Drilling Drilling Drilling Excavating. Blasting. Blasting. Blasting. More details » Get Price

  • Mine Drilling Blasting and Detonation – Crusher Machine ...

    Mine Drilling Blasting and Detonation is manufactured from Shanghai ,It is the main mineral processing solutions. stone crushing machine project-Mine Drilling Blasting and Detonation ShangHai ( Mine Drilling Blasting and Detonation ) are a professional production of stone crushing machine.Sales and Widely used in Europe, South ...

  • Blasting Techniques Used in Underground and Opencast Mines ...

    The blasting is known as blasting-off-the-solid or, in short solid blasting. P5 explosive is used along with Carrick short delay detonators (of I.E.L) or coal delay detonators (of l.D.L.) Introduction of such blasting in mines needs approval from the D.G.M.S. for exemption under the following regulations:

  • Drilling and Blasting Technology Innovations ...

    Gary Cavanough has Bachelor and Master’s Degrees in Physics and a PhD in Mining Engineering. He has over 34 years’ work experience comprising eight years in biomedical engineering, six years in RD in mining/mineral processing, 13 years as an engineer in heavy industry (mining, steel and power generation) and 10 years at CSIRO on drilling and blasting research.

  • Drill and Blast Performance Evaluation at the Obra Pit of ...

    drilling and blasting using Mine Management Reporting Software. From the analyses, it was observed that the blast designed parameters and blasting practices were acceptable to produce good fragmentation but the actual drilling parameters deviated from the designed parameters by about 25%, 24% and 26% in hole depth, burden and spacing respectively.

  • Rotary Drilling and Blasting in Large Surface Mines - 1st ...

    In large surface mining operations, drilling and blasting activities constitute more than 15% of the total costs. In order to optimize performance and minimize costs, a thorough knowledge of drill and blast operations is, therefore, extremely important. In this unique reference volume, rotary blasth

  • Blasting Techniques Used in Underground and Opencast Mines ...

    The blasting is known as blasting-off-the-solid or, in short solid blasting. P5 explosive is used along with Carrick short delay detonators (of I.E.L) or coal delay detonators (of l.D.L.) Introduction of such blasting in mines needs approval from the D.G.M.S. for exemption under the following regulations:

  • JNTUH Mining Previous Year Question papers : Drilling and ...

    11. _____are used in underground mines quarries to break coal and other rocks. 12. _____is the measure of the amount of energy released by an explosive during blasting and hence its ability to do useful work . 13. The rate at which the detonation ware passes through a column of explosive is _____.

  • Blast Hole Drilling: The Basic Process RPM Drilling

    Blasting Techniques and Methods Used Technique #1 – Open mine blasting. Open pit mining refers to mining minerals from, as the name suggests, an open pit; or may refer to any similar shallow mining operation. Open mine blasting plays a pivotal role in determining the needs of all other mining activities to

  • Drill and Blast Performance Evaluation at the Obra Pit of ...

    drilling and blasting using Mine Management Reporting Software. From the analyses, it was observed that the blast designed parameters and blasting practices were acceptable to produce good fragmentation but the actual drilling parameters deviated from the designed parameters by about 25%, 24% and 26% in hole depth, burden and spacing respectively.

  • Glossary of Blasting Terms

    Page 2 Blast Site - The immediate area where the blast holes are located and explosive materials are handled during loading of the shot. Blaster - That licensed, qualified person in charge of, and responsible for the loading and firing of a blast. Blasting Agent - A material or mixture consisting of a fuel and oxidizer used for blasting, but not classified as a high explosive, in which none of ...

  • Applicability of Controlled Blasting in Large Opencast ...

    Sep 26, 2018  The technique of line drilling is among the earliest controlled blasting method utilized in mining operations where rock mass is of homogeneous nature [13]. The purpose of line drilling is to create a plane of weakness by drilling closely spaced, small diameter holes along the perimeter of the rock mass which needs to be blasted (Figure 1).

  • Schedule - Pennsylvania Drilling and Blasting Conference

    Nov 14, 2019  At this time, the Pennsylvania Drilling and Blasting Conference set for November 14–15 will still be held as scheduled. We are closely monitoring the situation with the community’s best interest in mind as part of Penn State’s efforts to maintain public health and

  • Broward Mine and Mill Explosives Detonation

    Broward Mine and Mill Explosives Detonation Miramar, Broward County, Florida September 9, 1971 ... and Jones loaded the explosives vehicle with about 1,700 pounds of explosives and then drove the loaded vehicle to the drilling and blasting area where they performed their duties without known unusual incident until the accident.

  • 7.3.2.9 Measures during Drilling and Blasting

    Drilling and blasting in quarry will be done in accordance with the provisions of the Mines Act, rules and regulations; Adequate safety measures will be taken during blasting operations in the quarry so that men/machines are not affected; Ground vibration due to blasting

  • Different Types of Explosives Used in Mining

    Well, yes and no. From the ninth century AD (though the historians are still uncertain about the exact date of its invention) to the mid-1800s, black powder was the only explosive available. A single type of explosives was therefore used as a propellant for guns and for blasting purpose in any military, mining and civil engineering application.

  • Mining Services Contractor Canada USA Global

    Our mining services include: Production Drilling and Blasting . We provide mine production drilling and blasting services to clients anywhere in the world using state-of-the-art drilling equipment, the latest in detonation systems and highly experienced blasting crews.

  • Mines - Drilling and Blasting Contractors

    Large diameter borehole capabilities for increased rock drilling blasting production. Electronic Blast Detonation methods. Nearly 4 decades of rock drilling blasting experience. Complementary mine planning and mine design services by staff extensively trained in mining engineering. Complementary drone flights to film each mine blast

  • Technical Papers – Mining and Blasting

    Benefits of Inclined Drilling in Surface Mining: In Bench Blasting, inclined drilling extends numerous benefits. These are: – Better Fragmentation – Better displacement and swelling of muckpile, as Burden B is kept almost uniform along length of blasthole and angle