In India, lot of coal reserves exist up to 300m depth, are more amenable for extraction by opencast mining. Bulk production is possible with Opencast mining, with low gestation period, more safety and high percentage of extraction compared to underground methods. Hence coal operators are inclined towards...

Due to the fact that the German Railroad reduced the maintenance work on the important railway line Nuremberg – Regensburg, section Deining - Batzhausen they had several cases with blocks laying at the tracks. Therefore they decided to stabilize the 70° steep weathering prone sandstone slope. As a protective...

Mining of coal deposits in excess of half a billion tons has resulted in a massive volume of coarse overburden (OB) material that is posing challenges in sustainable practice of waste handling and management. Ever increasing land demand for industrial or domestic purposes, mostly in urban or densely...

Disposal of coal ash generated by thermal power plants is a challenge now days under rigid environmental norms. The conventional method of disposing in ash ponds leads to requirement of huge amount of valuable land and it have adverse effect on air, ground water and soil. Hence, the need of the hour...

Drilling is a very dominant operation in all rock cutting industries, namely, mining, petroleum, natural gas and civil engineering. The objective of this study is to understand the behaviour of rock drillability by mean of penetration rate of bit, with concentration of 10 ppm of carboxymethyl cellulose,...

From the observations of caving of the overlying roof rock in longwall panels it can be inferred that the caving is dominated by the weak parting layers, laminated nature and massiveness of the roof rock formation. This caving process is controlled by the presence and geo-technical properties of strong...

MOIL Ltd. (formerly Manganese ore India limited) operates 10 mines. Out of this 7 mines are underground. Chikla mine is one of the underground mines. The mining method employed here is horizontal cut & Fill. The present paper describes the studies conducted to optimize the stoping parameters for better...

A methodology was formulated for grading the quarries. To grade the quarry in terms of quality, the geological-cum-geotechnical characteristics of the rock mass and physico-mechanical properties were mainly considered. The point load test and rebound hardness using Schmidt hammer were used to estimate...

In this paper the stability analysis of an open pit slope of chromite mine in Odisha state, India has been evaluated with a present working depth of 147 m with 280 overall slope angle to deepening the pit to 182 m under critical geometrical conditions like limitation of area, and having two active internal...

This paper presents all the rock mechanics studies carried out at UCIL-Tummalapalle mine, Andhra Pradesh. The rock mechanics investigations in this mine includes, optimization of pillar dimensions by numerical modeling, feasibility of hangwall lode mining at shallow depth, support design for deeper levels,...

Minerals extraction from underground mine may lead to the disturbance in equilibrium of the overlying strata and these disturbances reflect in the form of subsidence on the surface. Subsidence is of two types, trough and sinkhole subsidence.Sinkhole subsidence is an abrupt local depression at the surface...