OneMine | Highwall mining technology— A review of current …
Highwall mining is a highly mechanized coal mining method associated with several advantages, such as a very high production rate (approximately 3,000 t/d) and …
Empirical Approaches for Design of Web Pillars in Highwall Mining
Pillar design is of paramount importance to any underground mine design. Oversized pillars may lead to loss of coal while undersized pillars may lead to instability. While underground pillars are mostly square and rectangular, highwall mining pillars are long and narrow, as they are formed after driving parallel entries in the seam from the …
Slope stability calculation method for highwall mining with …
A slope stability calculation method for highwall mining with time-dependent behavior is proposed, which provides meaningful insight for Chinese highwall mining …
Highwall Miner
The ability to mine this range of coal seam heights is accomplished by fitting interchangeable cuttterhead modules to the HWM for low, medium, or high seam mining applications. Streaming Video of Highwall Miner
Highwall Mining in India | SpringerLink
Highwall mining is a proven technology in USA and Australia to extract the blocked coal in thin non-workable seams and the coal blocked in the highwall of opencast mines. In USA, highwall mining contributes about 4.0 % share of total coal production. In India, the highwall mining is in the nascent stage.
Highwall mining of thick, steeply dipping coal–a case study …
Highwall mining is a technique for attaining additional coal recovery after the economic strip limit is reached in surface mining. It involves remote deployment of a …
CIMFR designs First Highwall Mining in India
Highwall mining is a new technology which can extend the life of opencast mines without disturbing the surface dwellings, and maintaining economy and productivity. This technology is in ... the first two Highwall Mining sites at Ramagundem Opencast Project-II of M/s Singareni Collieries Company Ltd (SCCL) and Quarry SEB and AB, West Bokaro of M ...
Microseismic monitoring of highwall mining stability at Moura Mine
In this paper we present results obtained from a microseismic monitoring at Pit 20DU at Moura Mine in central Queensland. The objective of this study was to investigate the feasibility of using the microseismic method to map roof fracturing associated with highwall mining for highwall mining stability assessment. 14 triaxial …
Highwall mining hitting new highs in India as
Over 50 highwall mining machines are still working in the US, but very few elsewhere – a handful in Australia and India and some locally made machines in China such as a machine similar to the ADDCAR design made by CCTEG which is working in the Ordos Basin coal mines in Inner Mongolia.
Highwall Concerns
As mining advances and mine design standards undergo operational changes, it is crucial any geotechnical assumptions be reviewed and modified by an experienced engineer or geologist to continuously ensure the integrity of the final highwall design and reduce the likelihood of highwall instability and rock-fall hazards.
Coal mining
Coal mining - Underground, Surface, & Drilling: The various methods of mining a coal seam can be classified under two headings, surface mining and underground mining. Surface and underground coal mining are broad activities that incorporate numerous variations in equipment and methods, and the choice of which …
Successfully mining multi-seam highwalls
WITH careful geotechnical and operational planning, money can be made from mining multi-seam highwalls. Angie Bahr investigates.
Review Of Highwall Mining Experience In Australia And A …
This paper presents a brief review of highwall mining experience at four Australian mines, with focus on geotechnical issues affecting mining performance. The paper also summarizes one case study, which involved major pillar/roof instabilities.
Highwall Safety | Highwall Regulations | Mining Safety Topics
Highwall is the unexcavated face of exposed overburden and coal in a surface mine. Additionally, highwall mining is another technique within mining practices sometimes conducted to recover additional coal. Presplit blasting facilitates highwall integrity and highwall safety. Learn more below.
Highwall mining of thick, steeply dipping coal–a case study …
Highwall mining is a technique for attaining additional coal recovery after the economic strip limit is reached in surface mining. It involves remote deployment of a continuous miner in openings beneath the final highwall, with no personnel entry. Many candidate areas for highwall mining have thick and steeply dipping seams.
Stability Analysis of Multi-Layer Highwall Mining: A …
1 School of Mines, China University of Mining and Technology, Xuzhou 221116, China ... extend the service life of the open-pit [9,10], which is essential for its sustainable develop- ... Highwall mining has a long history of application and a broad application prospect in open-pit mines. Researchers in various countries have …
Stability Analysis of Multi-Layer Highwall Mining: A …
Highwall mining has a long history of application and a broad application prospect in open-pit mines. Researchers in various countries have conducted corresponding studies on
Vitrinite highwall changes the coal mining game
Vitrinite has signed Gainwell Engineering to the first contract at the Vulcan coal mine in QLD, for the supply of a highwall mining unit.
[PDF] Stability analysis of rib pillars in highwall mining …
The highwall mining technique is widely used to extend the life of open-pit mines without disturbing the surface dwellings, while maintaining economy and productivity. In this paper, the theoretical …
DESIGN OF AUGER HIGHWALL MINING: A CASE STUDY AT MAE TAN COAL MINE
It leads to a permanent waste of resources, which impedes the progression of green mining. Highwall mining can effectively exploit the resources [8] below the end-slope and extend the service life ...
(PDF) Highwall Mining: A critical appraisal
However, due to varying conditions in different mines, highwall mining technology has experienced several incidents of platform instability, landslides, and significant roof collapses in practical ...
Slope stability calculation method for highwall mining with open-cut mines
Slope stability is a prominent problem for the efficient application and promotion of highwall mining technology, especially when mining residual coal under high and steep end-slope conditions. This study proposes the concept of target time pillar strength based on the required coal pillar service t …
Dawson Complex, Queensland, Australia
Highwall Mining. Moura's highwall mining system was commissioned in mid-1997, BHP has estimated that by 2012 there would be 127Mt of highwall reserves at the mine. Since over 80% are held in seams that dip steeper than 6°, conventional highwall mining equipment cannot operate satisfactorily.
An Investigation on Optimal and Safe Design of Highwall Mining …
When the mine boundary is reached during surface mining operations, and conventional opencast mining becomes impractical to proceed further, a significant amount of coal reserve is left trapped under open-pit highwall. To …
Ground Control Design For Highwall Mining
Prior work on highwall mining ground control identified several issues requiring further investigation, including highwall mining through old auger workings, highwall mining near old underground mines, multiple-seam and multiple-lift highwall mining and finally the size and frequency of barrier pillars (1). This study
Feasibility Evaluation of Highwall Mining in Open-Pit Coal Mine …
Highwall mining is a method that involves using a continuous highwall miner system (CHM) to extract coal from the remaining coal seams, which has proven to be an effective and safe method for extracting coal after open-pit mining. However, application cases globally have shown that the feasibility of highwall mining in open-pit coal mines …
A Highwall Mine (Yellow Bars are the Holes Mined) Extended …
Download scientific diagram | A Highwall Mine (Yellow Bars are the Holes Mined) Extended from a Surface Mine Pit from publication: Highwall Mining: Design Methodology, Safety and Suitability | As ...
Highwall mining | Britannica
Other articles where highwall mining is discussed: coal mining: Auger mining: Highwall mining is an adaptation of auger mining. Instead of an auger hole, an entry into the coal seam is made by a continuous miner, remotely operated from a cabin at the surface. The cut coal is transported by conveyors behind the miner to the…
HIGHWALL MINING SYSTEM
Highwall Mining system is a testament to versatile mining equipment. It offers a safe and innovative method for extracting ... Open cast: Highwall mining is used to mine coal from underneath the final highwall, when the strip limit is reached due to economic reasons or surface conditions.
Microseismic monitoring of highwall mining stability at …
Microseismic monitoring of highwall mining stability Xun Luo et al. ASEG 15th Geophysical Conference and Exhibition, August 2001, Brisbane Extended Abstracts renovated particularly for microseismic monitoring projects. The container was placed on the ground surface near