Service

At GCM, we adhere to the one-to-one targeted design of high-quality solutions, and use the professional knowledge and full-cycle services of our account managers to help customers carry out project operations, and thoroughly solve customers’ problems in equipment procurement, operating cost accounting, operation management and after-sales service. Distress, thereby improving customer profitability and achieving sustainable business development.

  • Drilling and blasting - LinkedIn SlideShare

    Apr 30, 2019· DRILLING AND ITS NECESSITY Drilling is the process of making hole in solid materials like rocks, timber, metal, etc. For blasting rocks, drilling is necessary to make hole in the rock to place explosive in the drill hole. Different tools and methods are used for drilling depending on the type of material, the size of the hole, the number of ...

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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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  • 20 Best drilling and blasting jobs (Hiring Now!) | SimplyHired

    119 drilling and blasting jobs available. See salaries, compare reviews, easily apply, and get hired. New drilling and blasting careers are added daily on SimplyHired.com. The low-stress way to find your next drilling and blasting job opportunity is on SimplyHired. There are over 119 drilling and blasting careers waiting for you to apply!

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  • Drilling & Blasting Excavation Services | Quality Rock ...

    Trench & Bulk Drilling & Blasting is typically used for sewer, water and utility trenches. Drilling is one of the primary techniques used in rock removal and excavating services. Holes are drilled into the surface of the rock and are packed with explosives, which are detonated.

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  • Drilling and Blasting - an overview | ScienceDirect Topics

    Jan 01, 2012· Zong-Xian Zhang, in Rock Fracture and Blasting, 2016. 21.5.2 To Increase Explosive Energy in Blasting. The preceding analysis indicates that an increase in drilling and blasting energy can increase the efficiency of total energy in the whole size reduction system. Moreover, a total of 210 blast tests show that the specific surface created by blasting in the unit of cm 2 /g linearly increases ...

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  • East Coast Drilling & Blasting, Inc. | Home

    East Coast Drilling & Blasting combines controlled rock blasting technique with precise drilling and blast design to remove rock from construction areas. Our expert personnel and leading fleet of equipment quickly and effectively remove problematic rock - letting our clients accelerate the construction process.

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  • Blasting | Britannica

    Blasting, process of reducing a solid body, such as rock, to fragments by using an explosive. Conventional blasting operations include (1) drilling holes, (2) placing a charge and detonator in each hole, (3) detonating the charge, and (4) clearing away the broken material. Upon detonation, the

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  • Edumine | Introduction to Blasting

    You will also be exposed briefly to methods for increasing the economics and safety of the drilling and blasting process. Course Content. Introduction to Blasting course is structured in four modules. Each module is divided in numerous parts where each part contains a video and each module contains review questions. In order to pass the course ...

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  • Drilling and Blasting of Rocks - E. Lopez Jimeno, C. Lopez ...

    The Geomining Technological Institute of Spain (ITCE), aware of this progress and of the importance which the breakage process has acquired in mining and civil engineering projects, has ordered the publication of Drilling and Blasting of Rocks. The purpose of this Handbook is to give basic knowledge of the drilling systems, the types of ...

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  • A uniquely holistic approach to the drill and blast process

    A holistic approach to the drill and blast process starts with a well-designed blast pattern, effectively executed using high-precision drills; it includes proven fragmentation analysis and blast monitoring solutions that minimise loss and dilution and delivers the data necessary for the next blast pattern design; and it ensures a continuous D ...

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  • Drill and Blast Method - railsystem.net

    Drilling and Blasting Method Sequences. 1- Drilling. Before the blasting takes place, the drilling rig bores the drill holes – determined in advance in a blasting plan – in the foremst front wall of the tunnel (working face). The more solid the rock, the more explosives are required. A jumbo is used to drill …

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  • Environmental impact of drill and blast tunnelling: life ...

    2) The drilling and blasting process is the dominate contributor to the human toxicity, photochemical oxidant formation, particulate matter formation and terrestrial acidification impacts. The relative influence of this process, however, slightly decreases when tunnels become bigger or longer.

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  • Blaster Certificate Training and Experience

    Blasting apprentices should select training that enhances their technical skills and provides the information necessary to pass the examination. The fundamental training programs are available with individual vendors, explosives manufacturers or blasting service providers. Scholastic training opportunities include:

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  • Drilling - Wikipedia

    Drilling is a cutting process that uses a drill bit to cut a hole of circular cross-section in solid materials. The drill bit is usually a rotary cutting tool, often multi-point.The bit is pressed against the work-piece and rotated at rates from hundreds to thousands of revolutions per minute.This forces the cutting edge against the work-piece, cutting off chips (swarf) from the hole as it is ...

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  • Performance Optimization for Drilling & Blasting Systems ...

    Real-time visibility into key performance indicators across drilling and blasting processes as well as field logs enables downstream analysis to minimize sound, vibration, toxic emissions, and ambient air pollution. We integrate the drilling and blasting management solution with the geological database and inventory management system.

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  • Leadership – Agassiz Drilling - Drilling and Blasting

    Our Proven Process. Since the inception of Agassiz Drilling we have established a solid reputation and a proven track record throughout the North providing our specialty drilling work such as overburden anchors for Hydro and bar and strand anchor installation on Hydroelectric dams. Leading the way in drilling and blasting.

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  • Drilling Techniques for Mining Exploration - Equipment ...

    Dec 13, 2018· Rotary air blasting is a type of rotary drilling, where a blade bit or roller-cone bit is used to cut and break rock with a simple blade mounted on the end of a rotating drill stem. This stem is rotated while a thrust is applied to it by a pulldown mechanism that …

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  • Drilling and blasting - Wikipedia

    Basic Blast hole Drilling Process: Step 1 – Surveying the location Before the blast hole drilling can begin, the proposed site needs to be inspected, and certain decisions need to be made with regards to the hole size/diameter, the type of drill or drills that will be required, etc.

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  • PROCEDURES FOR BLASTING

    Binary Explosive – A blasting explosive formed by the mixing of two plosophoric materials, for example, ammonium nitrate and nitromethane. Blast Pattern – The plan view of the drill holes as laid out for blasting. Blast Plan – A written procedure that details the methods and manner by which a …

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  • P&Q University Lesson 4- Drilling & Blasting : Pit & Quarry

    Aug 28, 2019· Blasting is heavily regulated and watched by federal, state and local agencies. In terms of processing, blasting is the critical first step in the rock-fragmentation process. Maximum profitability depends largely on an optimized blast. Consider that drilling and blasting are the first operations performed in any hard rock quarry operation.

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  • Drilling & Blasting Contractors | PA Drilling & Blasting ...

    Drilling & Blasting for Any Excavation Project. Whether you have large drilling and blasting jobs for a mountain cut containing a million cubic yards of rock or a small job requiring one or two hand-drilled blast holes, our drilling and blasting company can fulfill your project's requirements. Our customers range from excavating and highway contractors to quarries, developers, and general ...

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  • Chapter 8 BLAST DESIGN

    of explosive energy be placed into proper perspective within the entire drilling, blasting, handling and process-ing operation. This relationship is illustrated in Figure 8-7. (Figure 8-7) Analysis of efficient blast design.. Efficient blast designs combined with the proper choice of explosive can produce better fragmentation with

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  • Drilling and Blasting Techniques - EPIC Training Course

    This 3-day Short Course provides a state of the art introduction on the subject of Blasting Technology and in the process, removes some of the mystery and uncertainty around drilling and blasting operations. You have an opportunity to study the drilling and blasting industry from initial cost estimation and site analysis to final project ...

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  • Best practices: Drilling and blasting : Pit & Quarry

    Dec 07, 2015· Blasting contractors should lay out the drill pattern based on a surveyed profile of the face. At a minimum, a profile survey should be done after drilling and before loading so that the proper explosive load can be determined for each blast hole based on the survey and drill log. A best practice would be to profile both before and after drilling.

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  • Oil and Gas Drilling - The Process

    The process begins by drilling to the bottom of a fresh water aquifer The drill is then retracted and pulls the loose rocks and sediment to the surface to be discarded (i.e., drilling muds). Surface casing (steel piping) is inserted into the bore hole to protect freshwater aquifers by creating a physical barrier between the aquifer and drilling ...

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