I UNDERGROUND BLASTING - Mining and Blasting – Weblog …

UNDERGROUND BLASTING TUNNELING There are two reasons to go underground and excavate: i. to use the excavated space, e.g. for storage, transport etc. ... formation so that the axis of symmetry is at the centre line of the face. ... Underground mines are to extract underground metal-bearing orebodies. The excavation work for underground mines is

Underground Drilling and Blasting Training DVD - YouTube

Oct 24, 2012· Underground mine workers - the need to identify the potential hazards of working near or with explosives, and the protocols of re-entering a working area after blasting.

Specific and Non-Specific Hazards in Underground Mines

Explosives Fumes: According to the Dangers of Toxic Fumes from Blasting, surface mine blasters are far more complacent about fumes as those in underground mines. This is because there is a general belief that the open air would cause the fumes to disperse.

Glossary of Mining Terms - rocksandminerals.com

Glossary of Mining Terminology. A. Abutment — In coal mining, (1) ... Back — The roof or upper part in any underground mining cavity. Backfill — Mine waste or rock used to support the roof after coal removal. ... The line along which the roof of a coal mine is expected to break.

Underground mining (hard rock) - Wikipedia

Underground hard rock mining refers to various underground mining techniques used to excavate hard ... There are two principal phases of underground mining: development mining and production mining. ... Ventilation is the primary method of clearing hazardous gases and/or dust which are created from drilling and blasting activity (e.g., silica ...

MAI-2018-10 UNITED STATES DEPARTMENT OF LABOR MINE …

variety of drilling services in the underground mine. Major Drilling Underground has a total of ... including the victim. Empire State Mines LLC contracts. Hilltop Energy Inc. to provide blasting materials and services in the underground mine. Empire State Mines LLC also contracts with ... The underground air supply lines are fed from

Underground Drilling - International Mining

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.

Controlled blasting for enhanced safety J in the ...

underground mining. Importance of correct charging for ... In presplitting a line of holes, at closer than normal spacing, is charged with a decoupled charge and set ... improve profitability and the long-term feasibility of a mine. Controlled blasting for enhanced safety in the underground environment J …

Underground - Orica Mining Services

2 orICA MInIng SerVICeS UndergroUnd 3 Blast Based Services ... engineers on site to review blasting and mining operations and establish a base line for ... For Customers in the Underground Mining market who are seeking to combine a number of

Techniques of Controlled Blasting - SlideShare

Techniques of Controlled Blasting ... blasting : Like line drilling trim or cushion blasting involves a single row of holes along the specified final excavation line. This technique generally uses 2 to 4 inch diameter holes. ... It has also been observed that this vibration control method is feasible for underground mining ring blasts as well.

Blasting - Courses and Live Webcasts - Edumine

Blasting - Courses and Live Webcasts. Online courses, short courses and live webcasts about Blasting for mining and geoscience from Edumine.

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 Office of Mine Safety and Health Research National …

JAn 203 1 of 21 Surface Blasting Safety Procedures

oitted to Ecellence in Mining Safety Last Modified: Page: JAN 2013 2 of 21 MODULE 12 (C ONT.)Surface Blasting Safety Procedures Blasting Materials Surface delays, detonators or blasting caps, boosters, safety fuse, down-line and other explosives used for blasting.

blast pattern – Mining and Blasting

However, the general relations between the main blasting parameters; geology, blastability and explosives, will be applicable, and the estimation model is a very good tool for planning test blasts and experiments, and also for adjustments of the blast design when this is necessary for optimising the quarry production line as time progresses ...

Underground Products, Services and Reference Guide 2010

Our Underground Mining Engineers are working with mining companies to solve highly complex ... bottom line. As a DynoConsult client, you benefit from ... strengths and handling characteristics mean all underground blasting applications can be completed in the safest and most productive way.

BLASTING VIBRATIONS - Office of Surface Mining

made by drawing a line between blast location and seis­ mograph location, and determining whether any under­ gound mines were located under that line, which crude­ ly represented the path of transmission of vibrations. Next, since the mine to the north of the underground mines was located far from the underground cavities,

Surface Mine Blasting - Office of Surface Mining

Surface Mine Blasting Proceedings: Bureau of Mines Technology Transfer Seminar, Chicago, IL, April 15, 1987 ... Vibrations From Blasting Over Abandoned Underground Mines, by David E. Siskind ... lines surface mine blasting research com­ ...

Blasting in Underground Bituminous Coal Mines

procedures for shotfirers in underground bituminous coal mines. ... Out of the line of the blast. n. Separate magazines for explosives and detonators. n. Well rockdusted. n. At least 25 feet from roadways and any power source. n. ... Blasting in Underground Bituminous Coal Mines Author:

Surface Mine Blasting Near Pressurized Transmission …

Surface Mine Blasting ear ressurlze Transmission Pipelines By David E. Siskind, Mark S. Stagg, John E. Wiegand, and David L. Schulz UNITED STATES DEPARTMENT OF THE INTERIOR BUREAU OF MINES UBAARY SPOKANE RESEARCH CENTER ... to existing lines…

Explosives and Blasting in Underground Coal Mines

Apr 30, 2009· This entry was posted in blasting, explosives and tagged blasting, blasting in mines, coal mines, drilling and blasting, explosives, gassy seam, methane, mines blasting, underground blasting, underground coal mines.

TUNNELS, SHAFT AND DEVELOPMENT HEADINGS BLAST …

TUNNELS, SHAFT AND DEVELOPMENT HEADINGS BLAST DESIGN INTRODUCTION Tunnels, shafts, and raises are developed for a variety of purposes. In mines development headings provide; mine access for men and materials, ore and waste hoisting, and ventilation paths. Shafts are also used in civil construction projects. In hydroelectric projects, shafts and

Modern Underground Blasting Methods | E & MJ

Underground mining and construction projects face several challenges unique to the underground environment compared to the surface environment. The goals are the development of an effective blast pattern that minimizes cost, maximizes face advance, and …

Application of Tunnel Boring Machines in Underground Mine ...

and blast operation, yet overall tunneling costs could Application of Tunnel Boring Machines in Underground Mine Development M. Cigla, S. Yagiz & L. Ozdemir Excavation Engineering & Earth Mechanics Institute, Department of Mining Engineering, Colorado School of Mines…

Air Compressors For Mining | Mining Air Compressor

Learn more about finding the right compressor for your industry. Distributor Login ... hack saws and other vital mining equipment that needs to be used in the deep underground stretches of the mines. Blasting ... For more specific information regarding the ideal compressor, or the compressor line of interest for your operation, contact us ...

Underground Mining Drainage, State of the Art

The water inflow in underground mining operations could produce very serious safety and economic problems. ... of 59 Spanish coalfields we distinguish different categories of underground mines from an hydrological point of view: ... we can emphasise the mining method employed and the blasting that contribute to increase the rock

Blast Design and Assessment for Surface Mines and Quarries

Blast Design and Assessment for Surface Mines and Quarries consists of 36 viewing sessions of 30 - 60 minutes each with supporting figures, tables and examples, a glossary of blasting and excavation terminology, and interactive course reviews.

APPLICATION/PERMIT FOR THE EVALUATION OF SURFACE …

APPLICATION/PERMIT FOR THE EVALUATION OF SURFACE MINING ACTIVITIES WITHIN 500 FEET OF AN ACTIVE OR TOTALLY ABANDONED UNDERGROUND MINE NOTE: Submit one (1) original and three (3) copies of this form, along with three (3) ... Will strip mine blasting be correlated with underground mine

Drilling and blasting - Wikipedia

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.

MSHA : Older Video Clips (On-Line Videos) - Good Clips for ...

Hazard Recognition and Avoidance in Underground Coal Mines (1981)* Illumination in Underground Coal Mines (1980)* Man and His Habits (1969)* Managements Role in Health and Safety (1972)* ... Transportation and Communication in Underground Coal Mines (1981)* Underground Coal Mine Blasting (1975)*

Fumes from Blasting Operations - The Institute of Makers ...

Fumes from Blasting Operations. ... Unsealed entry points for new or existing utility lines also served as conduits and places of entry. ... Subpart G. MSHA regulates ventilation for underground coal mines in 30 CFR, Part 75, Subpart D. The Occupational Safety and Health Administration regulates ventilation for underground construction work in ...