how to improve explosive efficiency in opencast mines

Mining safety

Coal mining deep underground involves a higher safety risk than coal mined in opencast pits, due primarily to problems associated with mine ventilation and the potential for mine collapse. However, there are safety risks associated with all forms of coal mining, not least because of the heavy machinery utilised in coal excavation. Get price

Assessment of Maximum Explosive Charge Used Per Delay in

Assessment of Maximum Explosive Charge Used Per Delay in Surface locations in and around a major coal producing opencast coal mines in India. 100 blast vibrations records were This has led to the substantial increase in the consumption of explosive. When an explosive detonates in a blast hole, a tremendous amount of Get price

Chapter 8 BLAST DESIGN

The explosive column illustrated in Figure 8-6 on the right will produce the best fragmentation. EXPLOSIVES ECONOMICS 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 Get price

Underground Mining Methods and Equipment

UNESCO – EOLSS SAMPLE CHAPTERS CIVIL ENGINEERING – Vol. II - Underground Mining Methods and Equipment - S. Okubo and J. Yamatomi Encyclopedia of Life Support Systems (EOLSS) 2. Strength of the hanging wall, footwall, and ore body. 3. Economic value of the ore and grade distribution within the deposit. Get price

Analysing the Ground Vibration Due to Blasting at

Feb 02, 2013One of the most fundamental stages in open pit mining is drilling and blasting. A good fragmentation and a minimum ground vibration are characteristics of a successful drilling and blasting operation. In this study, 78 blasting events of AlvandQoly limestone mine located in Kurdestan cement company in west of Iran were investigated. The vibrations induced blasting was recorded by Get price

Murali Nagarajan and Chris Batten, Orica, Australia

improve coal quality, and reduce coal loss and dilution resulting from blast damage. Figure 3. The i-kon III electronic blasting system is designed to help customers improve productivity, operational efficiency and mine safety. Figure 4. Stratablast method for combined throw blasting and coal blasting – single coal seam example. Figure 5. Get price

IOP Conference Series: Earth and Environmental Science

Therefore, the intellectual property can be considered as a promising credit instrument in the scientific concept of intellectual underground mine of coal opencast. High efficiency of the hybrid method for development of coal seams exceeds the average profit in Kuzbass by 1.5 times. Get price

Optmization of blasting parameters in open cast mines

Blasting is still dominant over mechanization in opencast mines. Drilling and blasting contribute 30% of direct cost of production, hence proper designed blasting patterns must be applied for optimal fragmentation of rocks to minimize the cost of production . it leads to an increase in economic efficiency for exploitation of mineral resource. Get price

Opencast Mining Equipment

Mining. believing in old fashion honest ethics marmac mining has supplied top quality earth-moving and mining equipment for open pit opencast mines. specializing in mine rehabilitation of coal, gold and chrome mines, marmac mining is an ideal mining contractor in multiple regions across south africa. afri sand stone aims to become a signature Get price

Coal Mine Methane Recovery A Primer

The exposed coal is drilled, fractured and excavated in a succession of strips and then transported, via truck or conveyors to the coal preparation facility. It is possible to extract coal seams as thin as 100 mm (4 in) and recover 90% or more of the coal deposit. Opencast mines can cover an area of Get price

Murali Nagarajan and Chris Batten

The coal mine converted most of its blasting operations to the through-seam method with the continuous support from Orica to deliver consistent coal recovery and reduced blasting costs. Today, Orica continues to improve its offer with the introduction of the BulkmasterTM 7 explosives delivery system designed for use in the opencast mining sector. Get price

Council of Scientific Industrial Research

Exploitation of coal deposits and other minerals in different geo-mining conditions, numerical modelling and application of computer and information technology in mines, tunnels and underground caverns, development of methods and devices to improve safety standards in mines, environmental management, reclamation and development of innovative Get price

Optimization of drilling and blasting operations in an

Drilling and blasting play vital roles in opencast mining. These operations not only affect the cost of production directly but as well and significantly, the overall operational costs. This research was carried out to find a possible way of optimizing the drilling and blasting operations in an open pit mine of Somair (Socit des Mines de l Get price

WASTE AND OVER BURDEN MANAGEMENT IN MEGA

the opencast mine is going up at higher stripping ratio, the efficiency of the project. Therefore there is constant explosive is thus inevitable. Deep holes upto 65m and high charge of explosive upto 1000 Tonnes blasting at a time require special studies and attention to ensure safe level of vibration and required fragmentation for the Get price

Blasting Pattern In Opencast Iron Mines. 2012 In these cases, the firing pattern can be used to control the blast direction in a more favourable direction and improve the blasting result. Before drilling, the blast direction should be set according to the orientation of the main jointing systems. Explosives are energy, and the Get price

How digital innovation can improve mining productivity

The mine made some small changes to increase the flow of oxygen, which, as predicted, generated a significant yield gain. The increase in yield translated into a sustainable $10 million to $20 million annual profit improvement, with no need for substantial capital outlays or reorganizations. Get price

Coasting To Gradation Control

Aug 26, 2020Conventional drill and blast are still the most widely used excavation methods in quarrying and opencast mining, and in many cases they remain the most productive and cost effective techniques. However, mining activities must benefit from the latest technological developments as they produce new and more productive working methods. Get price

Optimization of Blasting Operation in Opencast Mine

efficiency is improved through the reducing of wastage of explosive energy in blasting, less throw of blasted material and reducing of blast vibration resulting in greater degrees of safety and stability to the nearby structures. Optimization means action of making the best i.e. to achieve maximum or minimum charge of the operating parameters. Get price

Blasting Pattern In Opencast Iron Mines. 2012 In these cases, the firing pattern can be used to control the blast direction in a more favourable direction and improve the blasting result. Before drilling, the blast direction should be set according to the orientation of the main jointing systems. Explosives are energy, and the Get price

Application of an Expert System to Predict Maximum

The present paper mainly deals with the prediction of maximum explosive charge used per delay (Q MAX) using an artificial neural network (ANN) incorporating peak particle velocity (PPV) and distance between blast face to monitoring point (D). One hundred and fifty blast vibration data sets were monitored at different vulnerable and strategic locations in and around major coal producing Get price

latest mining blasting technique

Jan 11, 2011 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. Get price

pwc.au Productivity and Cost Management

mining industry Australia has some of the world's largest coal reserves, but is Increase investment in profitable assets. Increase margin Slide 4 PwC Asia School of Mines 2012 November 2012 . Efficiency •Remote Logistics Slide 5 PwC Asia School of Mines 2012 November 2012 . Get price

Rock Breakage and Blast Design Considerations in Openpit

* Blast Casting with SMS A case study at Sasti Opencast mine, Visfotak 98, National Seminar on Explosives, Nagpur (India) * Control of adverse effects of Explosives Blasting in mines by using Shock tubes (Non-electric) Initiation system and its Future challenges; Advances in drilling and blasting techniques- Procc. of DRILL BLAST 99 National Get price

History of Explosives and Blasting

In the US and Canada alone, blasters use more than 6 billion pounds of explosives and 75 million detonators per year. Coal mining accounts for two-thirds of consumed explosives of which more than 80% of it is ANFO. Today, sophisticated explosive materials and new technologies are being utilized to improve the quality of life for all of us. Get price

OPEN CAST MINE PLANNING

Steps in Opencast mining 1) Determination of mine boundaries: Exclusion of: high SR area (deep seated, hill, thinning/splitting of seam, stone parting, geologically disturbed areas (faults), low quality areas, etc. natural boundaries (river/nallah, faults), township, railway line, operational factors like optimum strike length for transportation. Get price