No. 1688, Gaoke East Road, Pudong new district, Shanghai, China.
No. 1688, Gaoke East Road, Pudong new district, Shanghai, China.
Head Office National Institute of Rock Mechanics Eshwar Nagar, Outer Ring Road, Banashankari 2nd Stage Bengaluru - 560 070 Karnataka, India +91-80–2693 4402 / +91-80–2693 4414 +91-80-26934401
The most favourable open cast mining orientation in terms of highwall stability The maximum highwall height and face angle Overall highwall geometry (height and width of highwalls and benches) with respect to multi-seam mining. When considering the above aims, cognizance must be taken of the main cost advantage that open cast mining
The document discusses safety measures for persons working on benches in opencast mines to prevent falls. It notes that working at the edge of benches exposes workers to significant risk of falling. The key recommendations are to 1) conduct risk assessments to determine additional controls, 2) implement procedures like work permits and checklists, and 3) use protective …
Bench is a horizontal layer of ore rock upon which stripping and mining are performed in an open-pit mine. The bench is an essential constituent of the open stope. The bench on which stripping and mining are conducted is called the working bench. The bench temporarily unused is called a temporary nonworking bench.
The principal purpose of opencast mining-extraction of minerals from the earth with simultaneous removal of a large volume of capping and enclosing overburden rock-can only be achieved with a clear-cut and highly efficient organization of the leading and most expensive process of opencast mining-transfer of the mined rock from quarry faces to reception points at …
Planning and managing equipment systems of surface mining are critical for achieving higher production and productivity. Poor performance of equipment systems can endanger the economic viability of mining operations []–[].OB removal is a major process in the surface mining of coal, accounting for over 60% of the mining cost [4, 5].Dragline is …
It is proved, that the transition to high overburden benches in the period of maximum development of mining operations provides the increase in the volume of additional recoverable mineral ...
In Indian scenario, majority of large opencast coal mines are facing overburden dump stability problems (dump slide) as it results in loss of production, extra stripping cost to remove land slide material, reforming overburden dump benches, diversion of haul roads, production delays and sometimes loss of human lives and heavy earth moving machinery …
On the contrary, opencast mining attracts environmental concerns such as solid-waste management, land degradation and socio-economical problems. In addition to that a large number of opencast mines, whether large or small, are now days reaching to deeper mining depths. As a result analysis of stability of operating slopes and ultimate pit slope ...
From the point of view of blast-casting application in a benched deep-hole in an opencast mine, ECP is an important indicator to measure casting effect and production cost. ... Rock benches at the top of the blast-casting area are divided horizontally. The coal seam in the second mining districts inclines from North to South with the dip angle ...
Determination of practical bench height is an important subject in open pit mining. This subject has always been an issue with different and sometimes conflicting criteria that have to be ...
PDF | On Feb 24, 2019, Prashant Singh and others published OPTIMIZATION OF BENCH DESIGN IN OPENCAST MINES WITH COAL ASH AND OVERBURDEN AS A BACKFILL MATERIAL | Find, read and cite all the...
Proper design of working benches, haul roads, berms, spoil heaps and drainage arrangement and their proper upkeep is of paramount importance in an opencast mine from the point of view of productivity, cost-effectiveness and safety. Mining engineers should take an integrated view of vital parameters. The article gives some guidelines on factors ...
This study presents source apportionment and toxicity level of trace element concentration in total suspended particulate matter (TSPM) fraction of settled dust at different benches of opencast coal mine. In opencast coal mine, various mining associated activities are responsible for emission of TSPM. It is significant to study these airborne TSPM and …
This paper presents a critical review of the various approaches used for analysis of slope stability in opencast mines including details of limit equilibrium, and numerical model analysis, with a ...
analysis and monitoring is must for a deep opencast mine involving high benches. Transport of material from pit As o pencast mines get deeper, haul d istances and cost o f transport ation will ...
Wardha Valley Coalfield (WVC) is a NW–SE elongated structural basin with its coal bearing zone spreading over an area of 800 sq km along a length of 116 km situated towards the south of the city of Nagpur in the central …
deposit using one or more horizontal benches to extract the ore while dumping overburden and tailings (waste) at a specified disposal site outside the final pit ... discuss different variants of surface mining methods including opencast mining, mountainous mining, and artisan mining. 1. 1.1 Features, technical and economic indicators of open ...
In this article we will discuss about the opencast mining (quarrying):- 1. What is Opencast Mining? 2. Methods of Quarrying 3. Quarriable Limit 4. Formation of Benches 5. Manual Opencast …
Open-cast mines are dug on benches, which describe vertical levels of the hole. These benches are usually on four to sixty meter intervals, depending on the size of the machinery that is being used. Many quarries do not use benches, as …
of mining equipment on the benches of an open-pit . mine increases the surcharge, which in tu rn leads to a . ... opencast mine dump," M. Tech. Thesis, Department of .
analysis and monitoring is must for a deep opencast mine involving high benches. Transport of material from pit As opencast mines get deeper, haul distances and cost of transportation will increase
Open-cast mines are dug on benches, which describe vertical levels of the hole. These benches are usually on four to sixty-meter intervals, depending on the size of the machinery that is being used. Many quarries do not use benches, as …
Utilizing dragline for stripping overburden in surface mining is essential for boosting coal productivity and sustaining energy production [].The dragline excavates blasted material only in the case of opencast coal mines [7, 9, 17].The bucket of dragline is huge (more than 60 m 3) and heavy; hence, the impact of fragmentation of overburden (OB) material on dragline bucket …
OPEN-CAST MINING. Open-cast mining or Open-pit mining is a surface mining technique of extracting rock or minerals from the earth by their removal from an open pit or borrow.. Open-pit mines are used when deposits of commercially useful minerals or rocks are found near the surface; that is, where the overburden (surface material covering the valuable deposit) is …
Design of benches and faces Excavations, benches, and ponds should be properly designed, with: • stable slope angles • adequate benches • bench widths at least half the face height, and not less than 3.5 m • face heights suitable for the site conditions and excavation method • faces that do not exceed the reach of the excavator
opencast mining indicators and their properties have been generated from Discrete Wavelet Transform (DWT). A high rate of land deformation (landslide, land subsidence and land uplift) was observed in and around opencast mine area. The effect of land deformation due to opencast mining activities was lesser as one goes away from the opencast mine.
Drilling and blasting are the major unit operations in opencast mining. Inspite of the best efforts to introduce mechanization in the opencast mines, blasting continue to dominate the production. Explosives contribute currently about 5% of the direct cost of production and if the aggregate cost of drilling and blasting is taken together, this ...
Opencast is also a surface mine to mine out the flat deposits but the overburden is backfilled in the worked-out area. In open cast (or strip) m ining, overburden
The Jayant project of Northern Coalfields Limited is located in the Singrauli Coalfields of Singrauli district, Madhya Pradesh between latitudes 24 ° 6 ' 45"to 24 ° 11 ' 15" and longitudes 82 ° 36 ' 40" to 82 ° 41 ' 15". The overall …
