NEW DEVELOPMENT ON ENGINEERING BLASTING ...

Design,Operation and Assessment of Pre-spl it Blasting in Open Out Coal Mine Safety Control and Practise of Blasting in the Site Preparation for Shaft Sinking in an I ron Mine Blasting of the Dangerous Rocks on Cl iff in the Area of Magazine The Appl

Schissler AP (2004) 485-494 Coal Mining, Design and …

2020-9-24 · Coal Mining, Design and Methods of ANDREW P. SCHISSLER The Pennsylvania State University University Park, Pennsylvania United States 1. Introduction ... The steps in contour mining begin with drilling and blasting a triangle shaped portion of overburden (in cross section) above the coal to be mined. The fractured overburden is then loaded into

A new mining method

2005-12-22 · the coal. This mode of blasting is often termed "stand-up" blasting. The blast patterns used in blasting the coal are smaller with smaller diameter holes generally being used. Hole diameters for coal blasting may range from 127 - 254 mm (5 - 10 inch). Often, a separate dedicated drill rig is used for coal blasting. The coal blast blocks

Enabling better blasting

2019-12-12 · Ailbhe Goodbody examines how the eciency of blasting at mining operations can be improved or optimised According to ''s Adrian Imre, blasting optimisation is a complex process that perfectly illustrates how a multi-faceted problem can be solved with teamwork Surface Mining > Development 12 November 2019 Ailbhe Goodbody

Computer aided blasting-round design in an arctic coal mine

1987-9-1 · Design of blasting-rounds in surface coal mines is dependent on physical properties and structural characteristics of the overburden material. In the …

Mining and Blasting

Explore the latest full-text research PDFs, articles, conference papers, preprints and more on MINING. Find methods information, sources, references or conduct a literature review on MINING

Rules of Thumb Blast Design | PDF

2014-4-18 · Coal Mine Single Hole Blast Design. The following spreadsheet will calculate the configuration of a single blast hole. The calculations are based on the following parameters: coal seam depth, rock type, blasting agent density, and the distance of the nearest structure.

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2022-9-15 · Blasting monitoring system is built and introduced including the main equipment and their roles, and design blasting locking function and blasting-fume monitoring & analysis function. Spot tests of blasting locking function and its practice are carried out in Dongguabang face of Guilaizhuang golden mine.

Blast-Casting Mechanism and Parameter Optimization of a …

As a result, the bench height for the blast-casting technique ranges from 35 m to 50 m with the width of the blasting area being 85 m. In addition, the slope angle of the bench is 75°, the length of the working face is 1800 m, the spacing of the blasting holes …

Blasting mechanics: Blasting design standards : Pit & Quarry

2019-2-21 · 2. u0007For hole firing instantaneously along a row, the KS should be equal to 2; 3. u0007For holes firing on a delay, the KS should be between 1.0 and 2.0 – and typically between 1.2 and 1.8. This is because the blasting is four-dimensional, as timing is a …

Blast plan preparation, including mining operations

2  · Guide to blast plan preparation, including mining operations Page 5 of 14 for two years after the use of the explosive. In mining operations, the manager of the mine or the principal employer at the mine would be required to hold copies or originals. The blast plan is not submitted to Resources Safety for authorisation.

(PDF) ROCK BLASTING FOR MINING

2017-4-15 · The basic objective of this report is to highlight the principles and practices adopted in rock blasting operations for mining sectors. The aspects concentrated in this report are: a) Purpose...

Calculation of blast hole charge amount based on three …

2022-1-11 · With the application example of No. 918 bench blasting of Shengli Open-pit Coal Mine in Xilinhot, Inner Mongolia, the blast hole charge amount in the blasting area is calculated and compared with ...

Blast round design and casting in surface coal mining

Cast blasting can be designed to utilize explosive energy effectively and economically for coal mining operations to remove overburden material. The more overburden removed by explosives, the less blasted material there is left to be transported with mechanical equipment, such as …

A novel powder factor based bench blast design method …

2020-10-28 · has yet to create a blast design method specifically tailored for large surface coal mine bench blasting. This research examines the typical scale of bench blasting at large surface coal mines, develops a new method of design tailored for these operations, and tests the new method against two widely accepted traditional blast design methods. Novel

Blast round design and casting in surface coal mining

Casting design for bench blasting in surface coal mines is a new focus and a fairly recent success. This study aims at the development of a model to predict the throw of overburden material based on geological conditions of a bench and charges in blast holes.

Optimal layout of blasting holes in structural anisotropic …

2019-6-18 · 4 Blasthole design in coal seam. Before designing blasthole layout in coal seam, it needs to investigate correctness of calculation results. So field test is arranged at No. 16 mining area of Second-1 coal seam in Jiulishan coal mine, Jiaozuo, China. The thickness of coal seam is between 6.1m and 8.1m, and the average thickness is 7.1m.

Blasting Principles

Casting (or Cast Blasting) A blasting technique that aims to maximise material movement. Casting is generally used in coal mining to minimise the amount of mechanical excavation required to …

Optimization of blasting parameters in opencast mines

Optimization and Determination of Blast Design Parameters for an Opencast Mine. H. Naik, Rahul Kumar. Materials Science. 2018. According to the study of performance analysis of various unit operations on opencast mines, transporting and excavating equipments are primarily dependent upon the blast results, most importantly to…. PDF.

Software Solutions for Better Blasting | Coal Age

2013-12-18 · Even though several of the examples are from hard rock mines, the technology is transferrable to coal. Surface-mine blasting technology has advanced at a steady pace, and improvements such as electronic blasting systems with vastly expanded delay-timing ranges and detonation capacities, new explosive products, and user-friendly blast-design ...

Optimization of Close-Range Blasting Design with …

The optimized design offers five types of shock-absorption and velocity-reduction multi-stage millisecond denotation networks based on different blasting distances. Together with open-pit coal mine blasting technology, this design can effectively solve the safety issues of close-range blasting vibration on ground building structures.

Blasting | Office of Surface Mining Reclamation and …

For More Information Contact Ken Eltschlager, OSMRE mining/explosives engineer, via [email protected] or by phone at (412) 937-2169. The Surface Mining Control and Reclamation Act of 1977 (SMCRA) requires that coal mining be conducted in a manner that prevents injury to people and damage to public or private property during blasting.

Blasting

Cost: +-R121 000.00. Please let me know if you will be needing a formal quote. We also offer Skills Programmes; Comp A – R 3 581.88 per person per course, Duration: 5 Days. Comp B – R 7 164.90 per person per course, Duration: 10 Days. Blasting Assistant – R 3 581.88 per person per course, Duration: 5 Days.

An Innovative Directional Blasting Technique for Coal …

2  · The pattern of shot-holes drilled for solid blasting in coal in galleries of bord and pillar working is: 1. Wedge cut, or 2. Fan cut Drivage of a narrow gallery in coal without an undercut …

Economic Evaluation of Drilling and Blasting on the …

2022-4-8 · Landau Colliery mines two types of coal, thermal coal and metallurgical coal. Both types of coal are exported and sold to local markets. 30 percent of coal production comes from mini-pit operations, they are Schoongezicht, Excelsior and Umlalazi, and all mini-pit operations are under Benicon contractors.

Optimization of Blasting Operation in Opencast Mine

2020-5-22 · Because modern mines require large amounts of explosives throughout the mine''s life, the cost of blasting operation can be significantly reduced by reducing the cost of explosives. Key Words: Optimization, Drilling, Blasting, Opencast mine, Blast model, Explosives, Machinery. 1. INTRODUCTION Pre commencement of topic to introduce MINING

GUIDELINES FOR THE INTEGRATED PLANNING AND …

2021-9-10 · The systematic planning and design process for underground coal mining operations – from inception to closure 1. PHASE 1: INVESTIGATIVE STUDIES 1.1 Market analysis The …

Blast-Casting Mechanism and Parameter Optimization of a …

Specifically speaking, once the blast-casting technique is applied in opencast coal mines for overburden removal, 30–65% of the materials can be directly thrown into the mined-out area …

(PDF) Optimized design of drilling and blasting …

2018-6-1 · The Coal vision 2025 of India estimates that the total domestic coal production is projected to increase to 1086 MT in 2025, of which the opencast production will be 902 MT (83%).

Characteristics of coal mining microseismic and blasting …

2017-10-28 · The location of the coal mine is shown in Fig. 1. It has a production capacity of 2.1 million tons per year. The main mining layer in this mine is coal seams 2-1. Seam 2-1 has a dip angle of 3°–13° and a thickness of 1.25–4.85 m with an average thickness of 3.9 m. Most of the coal in seam 2-1 is exploitable.

Experimental study and application of medium‐length …

2020-1-10 · Therefore, the hole cut blasting mechanism of coal-rock masses under different conditions should be investigated to provide a theoretical basis for efficient roadway hole cut blasting design. Blasting method plays a dominant role in roadway excavation of coal mines in China. However, blasting efficiency of rock roadway has remained at a low ...

Blasting Injuries in Surface Mining with Emphasis on …

2012-8-29 · 1999; USGS, 2000). Out of this, coal mining used 66.4%, nonmetal mining and quarrying 13.5%, metal mining 10.4%, construction 7.1%, and all other users 2.6%. 1.2. Generic protocol for loading and firing of explosives in surface mines Blasting is a complex activity demanding special skills on the part of the blaster and other crew members.

Design and Realization of the Intelligent Design System …

2020-10-27 · With the improvement of informatization and standardization of mine development, it is an inevitable trend to apply computer technology to the intelligent design of tunnel blasting excavation. Seeking to the problems existing in the intelligent design system of blasting excavation, a new intelligent design system of blasting excavation is constructed from the …

Modeling Coal Seam Damage in Cast Blasting

1998-11-23 · Blast design in coal mine cast blasting is usually a compromise between coal damage and rock fragmentation and movement (heave). In this paper the damage to coal seams from rock movement is examined using the discrete element computer code DMC_BLAST. A rock material strength option has been incorporated into DMC_BLAST by placing bonds/links ...

(PDF) Surface Mine Design

2017-3-13 · In surface mining, blasting patterns have to be properly planned to get adequate fragmentation of overburden. Open pit design is elaborated in several stages that consist of …

Chapter 8 BLAST DESIGN

2022-4-21 · BLAST DESIGN (Figure 8-2) Staggered pattern (Figure 8-3) Sing (Figure 8-1) Square or rectangular pattern. 114 ... 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