Instability of topsoil benches of a pit caused by dumping of waste rock outside an opencast coal mine by A Golder1 Dandapat1 and I Roy2 Abstract One of the consequences of large scale opencast mining for coal is the disposal of an enormous volume of overburden material that needs to be removed With the enlargement of opencast mines
sandstone bench in an opencast mine is shown in Fig 3 The slope failures were normally restricted to soil benches but extended to the underlying sandstone benches Fig 2 A typical bore hole section of an opencast coal mine Fig 3 A view of the slope failure involving an overburden dump in New Majri Opencast NMOC mine
Presently about 70% of the production of coal is being carried out by opencast mining from coal benches over underground developed galleries in Jharia and its adjoining coalfields Most of the mines developed earlier by underground are presently being excavated by opencast method to meet the production target Due to intrinsic
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
The research in ECL & BCCL subsidiaries of Coal India shows that fire and unsystematic underground mining need deep opencast mining The objective of the paper is the continued viability of
amplified when the height and width of the benches became higher and wider to ply massive mine machinery to improve the run of mine but it resulted in unstable bench slopes
The mining method at Banduhurang involves 6m/12m high ore benches and 6m/12m high overburden/waste benches breaking the rocks with explosives loading the material with excavators and hauling with dumpers Mining will be carried out by Excavator Dumper combination primarily by top slicing method as is being practiced
underground mine workings will be maintained and checked regularly The galleries and junctions of the developed underground workings will be plotted accurately and clearly on the plan of the opencast workings and also demarcated on the OB and coal benches Drilling
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
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
PDF Surface mining; Classification of surface mining methods together with the desired parameters/ conditions suitable for their applications; Find read and cite all the research you
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
Opencast mining is reviewed on a county by county basis to identify the variations in the disturbance caused A detailed review of restoration techniques and the agricultural quality of zontal benches while the dragline excavates the lower sections Overburden is transported from the first cut and deposited in a position either suitable
30311 OPENCAST MINING UNIT 1 BASIC CONCEPTS ABOUT SURFACE MINING Define Surface Mining different forms of Surface mining Geo mining situation under which Preparation of ground de vegetation clearance Formation of OB Benches Coal benches Drilling blasting loading transportation back filling Box cut
Research studies carried out on opencast mine illumination by different investigators are limited in both India and abroad Mayton [] investigated different surface mining operations in various regions of the United States using visual task evaluation a method used by the CIE and the IES and data were collected for surface mines and quarries in 15 metal
Click here 👆 to get an answer to your question ️5 Four benches are being worked by the opencast mining system Height width and face angle for each bench are 15 m 50 m and 70 respectively The overall slope angle of the benches in degrees is a 1545 Four benches are being worked by the opencast mining system Height width and face angle
The slope condition is assessed based on the influence of strike fault near or within the mine workings spoil dump near the slope crest localized instabilities on the benches and drainage condition in the mine The ratings for different parameters are shown in Table 2 Adjustment of Slope Condition
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 Features technical and economic indicators of open
1 In all mechanized opencast workings the precautions specified in sub regulation 2 to sub regulation 6 shall be observed 2 Before starting a mechanized opencast working the owner and agent of the mine shall ensure that the mine including its method of working ultimate pit slope dump slope and monitoring of slope stability has been planned
Mining Strip Open Pit Quarrying It has been estimated that more than two thirds of the world s yearly mineral production is extracted by surface mining Deposits mined by open pit techniques are generally divided into horizontal layers called benches The thickness that is the height of the benches depends on the type of deposit
