Effect of rock properties on rippability of laterite in Iron Ore mines of Goa

Avchar, Akhil; Choudhary, Bhanwar Singh; Budi, Gananand; Sawaiker, Ulhas

doi:10.18280/mmep.050208

Cited by 3 publications

(2 citation statements)

References 3 publications

(3 reference statements)

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“…• Stress in terms of k (horizontal stress/ vertical stress), • Excavation geometry, The effect of number of joints near or intersecting a given stope surface is beyond the scope of this research. Also it was observed from some research papers that joint effects the overall properties of rock mass [2] and [3]. However, it is suspected that the effect of this is probabilistic.…”

Section: Effects Of Joints and Stress On Open Stope Designmentioning

confidence: 99%

A Numerical Method Approach for Analyzing the Effects of Joint Orientation on Stability of Open-stope in Metalliferous Mines

Verma¹,

Jaiswal²,

Avchar³

2019

ACSM

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This research is focused on evaluating the effects of joint orientation on the stability of open stopes. Joints are often seen as the source of failure in an open stope. Joint orientation adversely affects the stability of the open stope by majorly causing non-uniformity in stress and providing a surface for free movement of strata. Effect of joint orientation on stope stability is less discussed with few publications. This study exclusively identifies the effect of joint orientations on stope stability with the help of numerical model designed in finite difference method computer software. In this research, different rock strengths were considered to determine how joint orientations ranging from 0 to 165 degrees affect the stability of open stopes having variable horizontal to vertical stress ratio values and thus the failure behavior is obtained. The application of the results of this research in the metal mining industry should lead to improved understanding of the effects of joint orientation on stope stability for different rock strata at variable depths, and hence useful in devising a suitable design method of mining metal orebody that offers optimum stope span, maximum production and required factor of safety.

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Section: Effects Of Joints and Stress On Open Stope Designmentioning

confidence: 99%

A Numerical Method Approach for Analyzing the Effects of Joint Orientation on Stability of Open-stope in Metalliferous Mines

Verma¹,

Jaiswal²,

Avchar³

2019

ACSM

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“…Chlorite schist, a typical metamorphic rock with schistose structure, features low strength and large deformation in engineering. In the engineering environment, chlorite schist is susceptible to expansion, disintegration, dissolution, and weathering [2].…”

Section: Introductionmentioning

confidence: 99%

Strength Control Factors of Chlorite Schist under Schistose Structure

Yan¹,

Wang²,

Wang³

et al. 2020

IJDNE

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In tunnel engineering, it is important to understand the influence of schistose structure on the failure strength of chlorite schist. To explore the strength control factors of chlorite schist, this paper firstly analyzes the mineral composition and meso structure of chlorite schist of different weathering states. The results show that the mineral composition of chlorite schist is changed during the weathering process, and that chlorite is an anisotropic rock mass. Next, a series of uniaxial compressive tests were conducted on chlorite schist samples with different bedding angles (the angle between bedding plane and loading direction; θ=0°, 15°, 30°, 45°, 60°, 75°, and 90°), moisture conditions (dry and saturated), and weathering states (strongly weathered and weakly weathered). Based on the test data, the authors discussed the change laws of the rock strength with bedding angle, weathering state, and moisture condition. The main results are as follows: Chlorite schist is a low-anisotropy rock mass, whose compressive strength exhibited a V-shaped trend with the growing bedding angle; the schistose structure is the internal cause of the deformation and the anisotropic or transversely isotropic strength of the schist; the schistose structure is reshaped and further damaged by external factors (e.g. water softening and weathering effects) in engineering. The research findings help to improve the rock stability and support design in tunnel engineering.

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Ripper Production Prediction for Laterite Excavation in Iron Ore Mines

Avchar¹,

Choudhary²

2021

J Min Sci

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Effect of rock properties on rippability of laterite in Iron Ore mines of Goa

Cited by 3 publications

References 3 publications

A Numerical Method Approach for Analyzing the Effects of Joint Orientation on Stability of Open-stope in Metalliferous Mines

A Numerical Method Approach for Analyzing the Effects of Joint Orientation on Stability of Open-stope in Metalliferous Mines

Strength Control Factors of Chlorite Schist under Schistose Structure

Ripper Production Prediction for Laterite Excavation in Iron Ore Mines

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