perimeter drilling techniques in hard rock mining


Underground Hardrock Miner - YouTube

Apr 26, 2015· 420ugminer running a Stoper. MBMMLLC.com: Complete Crushing Mill for Gold Hardrock Ore: Jaw Crusher, Impact mill, Hydrocyclone - Duration: 3:39. mbmmllc 113,845 views

(PDF) Underground mining Methods - ResearchGate

c) Unsupported, supported and caving underground mining methods Hard rock under ground mining methods can be classified as the follo wing:- Hard rock Mining Me thods

Softrock Mining Techniques|Underground Mines|Minings Method

In contrast to this is the underground hard rock mining where techniques are used to extract minerals that are hard. This method, called the soft rock mining is used only in places where the deposits in sedimentary rocks are layered and soft. This method is implemented after a careful study and the amount of deposits available in the area.

mining engineering: Explosives and Drilling

Crater blasting techniques ([email protected], MVCR, HCR, and ) are often employed for larger underground ore bodies in hard rock mines stoped with bulk mining methods. (Refer to Chapter 3 – Mining Methods for additional information.) Crater blasting has been used successfully for …

A New Perimeter Control Blast Design Concept for ...

A NEW PERIMETER CONTROL BLAST DESIGN CONCEPT FOR UNDERGROUND METAL/NONMETAL DRIFTING APPLICATIONS Stephen R. Iverson, William A. Hustrulid, and Jeffrey C. Johnson DEPARTMENT OF HEALTH AND HUMAN SERVICES Centers for D isease Control and Prevention National Institute for Occupational Safety and Health

(PDF) ROCK BLASTING FOR MINING - ResearchGate

and blasting methods, the mining work can be done effectively. The basic objectives of this report is to highlight the principles and practices a dopted in rock blasting operations for mining sectors.

Rock mechanics related to mining: challenges and …

drilling) Challenges in rock drilling • Mechanism of breakage in drilling • Energy consumption and distribution • Repeat breakage and cutting discharge • Deep drilling with high confinement and high temperature Chance to increase drilling speed and energy efficiency Down-the-hole drill rig from (Zhang 2016) Rock drilling 26 ...

Adapting oil and gas drilling techniques for the mining ...

Adapting oil and gas drilling techniques for the mining industry Anderson, 2015). R&D spend as a percentage of revenue ... directional well placement in hard rock mining has a very ... the pit perimeter of the east high wall. The target for the second well was a set of northeast-trending geological

Hard-Rock Underground Mining - How Underground Mining ...

There are hard-rock underground mines, and there are soft-rock underground mines. Coal deposits, for instance, live in relatively soft sedimentary rock. Gold deposits live in igneous or metamorphic rock, which is relatively hard, as do diamonds, copper, silver, nickel and zinc [source: Great Mining ...

DTH(Down The Hole) Drilling Application - hardrockdrills.com

Dec 29, 2017· Typical drilling applications − In civil engineering DTH drilling is used for a lot of different applications − Blast holes at construction sites used for removal of rock in road and railway projects, construction of HE plants etc − Foundation drilling methods are used to reinforce or stabilize rock and soil in different construction projects

Glossary of Mining Terminology - Glace Bay

Glossary of Mining Terminology After Damp - Gasses resulting from underground combustion, normally carbon monoxide. This is a loose term implying any fatal gas in a mine after an explosion or fire. Air Shaft - A vertical opening into a mine for the passage of air. Airway - Any passage in a mine along which an air current moves. Some passages are

Drilling and Coring Techniques for Hard Rock | SpringerLink

The paper summarizes the concept for technical development to improve drilling techniques for hard rock as well as results obtained with some specific methods of hard-rock drilling, such as the application of downhole hammers.

Hard Rock Miner's Handbook - Stantec

Hard Rock Miner's Handbook is a work of the heart. Jack—whose 40+ year career spanned engineering, construction, and operation of mining projects worldwide—conceived of and wrote the first edition of the Handbook, published in June 2000, to assist miners and engineers in the difficult world of hard rock mining. It was his

3 Technologies in Exploration, Mining, and Processing ...

The life cycle of mining begins with exploration, continues through production, and ends with closure and postmining land use. New technologies can benefit the mining industry and consumers in all stages of this life cycle. This report does not include downstream processing, such as smelting of ...

Rock blasting for mining - SlideShare

Jul 28, 2017· Let us see the details of blasting methods adopted in mining operations. 10. 10 This image shows a large scale open cast mine. Large scale mining in hard rock zones are difficult without the application of drilling and blasting operations. 11. 11 This is an areal view of a mine. 12. 12 This illustration shows the schematic view of a quarry ...

The difference between 3 rock drilling methods — Rotary ...

Drilling and blasting is an important section during mining production. Let's talk about the three methods of rock drilling — Rotary drilling, DTH (down the hole) drilling and Top hammer ...

Hard rock cutting and the development of a continuous ...

century it is necessary to follow the lead of the soft rock mining industry and change the technology of mining. In the underground coal mining industry, coal cutting has been proven to be the most cost effective solution, in narrow reef hard rock mining the future must be based on the development of non-explosive methods of rockbreaking that

A Case Study Examination of Two Blast Rounds at a Nevada ...

A Case Study Examination of Two Blast Rounds at a Nevada Gold Mine ... to rock mass characteristics that can minimize damage to rock in the perimeter of the opening, limiting ... majority of metal and non-metal mines use drill and blast techniques for drifting and primary development. After blasting, the broken rock is mucked out. ...

DRILLING AND BLASTING IN HARD ROCK NARROW …

A number of underground visits have been made to different hard rock operations, sometimes with the express purpose of assessing drilling and blasting, and sometimes for other reasons. These visits provided insight into handheld drilling on hard rock mines. An obvious shortcoming, in many instances, was in marking the faces to be drilled and ...

Adapting oil and gas drilling techniques for the mining ...

Adapting oil and gas drilling techniques for the mining industry with dewatering well placement technology ... wells in hard rock mining environment in the USA and Mexico have demonstrated that ...

Rotary Drilling Method - Hardrockdrills.com

Mar 04, 2018· In smaller holes, it is most common in softer rock formations. The drilling principle is to use a high pull down force (weight-on-bit), rotate the drill bit, and blow the rock cuttings to the surface with compressed air. Hardrock drills typically use the Rotary method to drill blast holes from 200 mm (7 7/8") to 311 mm (12 ¼") diameter.

Underground mining (hard rock) - Wikipedia

Underground hard rock mining refers to various underground mining techniques used to excavate hard minerals, usually those containing metals such as ore containing gold, silver, iron, copper, zinc, nickel, tin and lead, but also involves using the same techniques for excavating ores of gems such as diamonds or rubies.

Mining Project: Blast Damage Control to Reduce Injuries ...

Apr 11, 2016· Mining Project: Blast Damage Control to Reduce Injuries from Ground Falls in Underground Western U.S. Hard Rock Mines Keywords: Blasting Drift mining Mine design Scaling Support design and selection This page is archived for historical purposes and is no longer being maintained or updated.

Code of Practice - Department of Mines, Industry ...

Code of Practice SURFACE ROCK SUPPORT FOR UNDERGROUND MINES CODE OF PRACTICE FOREWORD The Surface Rock Support for Underground Mines Code of Practice (hereafter referred to as the Code) applies to all underground excavations in which persons may travel or work and includes development headings and entry-method stopes.

Techniques of Controlled Blasting - SlideShare

Dec 17, 2009· Following are the techniques of controlled blasting: Line drilling, Trim (Cushion) blasting, Smooth (contour or perimeter) blasting, Pre-splitting, Selecting and employing various parameters of blast design, using modern technology, Precise and accurate timing delays, Muffle blasting at critical and congested areas. 4 5.

Hardrock Mining | ONE

After the explosion, miners mucked out the loosened ore and country rock with picks and shovels. The invention of dynamite in 1867 and the mechanical compressed air rock drill in 1869 revolutionized the excavation process. Mining underground often created large caverns or "stopes" that tended to collapse.

Geotechnical considerations in underground mines

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 …

The Influence of Rock Mass Quality in Controlled Blasting

The Influence of Rock Mass Quality in Controlled Blasting ... Hard Rock: Specific Gravity ... 26th International Conference on Ground Control in Mining 317 Weathering of Rocks Rock weathering ...

Hardrock Mining Techniques|Underground Mines|Minings Method

Underground mining (hard rock) Underground hard rock mining refers to various underground mining techniques used to excavate hard minerals such as those containing metals like gold, copper, zinc, nickel and lead or gems such as diamonds. In contrast soft rock mining refers to excavation of softer minerals such as coal, or oil sands. Mine Access

Hard Rock Equipment - Underground Mining | Mining ...

Hard rock equipment We have an extensive product suite of hard rock mining equipment, including hydraulic jumbo drills, drifters, loaders, and trucks. In addition, we offer a full line of raiseboring tools and blasthole drilling tools .