Analysis Of Highwall Mining Stability

production method, analysis shows that auger and highwall mining appears to be as safe as surface coal mining (6). However, there are geotechnical considerations with highwall mining that require careful engineering to realize the full economic and safe potential of highwall mining. Highwall stability is the overriding concern in highwall mining.

Mining Publication: Analysis of Highwall Mining Stability - The Effect of Multiple Seams and Prior Auger Mining on Design. Keywords: Barrier pillars Highwall mining Support design and selection Web pillars. This page is archived for historical purposes and is no longer being maintained or updated.

ARMPS-HWM is a modification of Analysis of Retreat Mining Pillar Stability (ARMPS) software for designing web and barrier pillars for Highwall Mining (HWM). ARMPS-HWM calculates stability factors based on estimates of the loads applied to, and the load-bearing capacities of, web and barrier pillars used in highwall mining operations.

Newman, D. (2005). Analysis of Highwall Mining Stability - The Effect of Multiple Seams and Prior Auger Mining on Design. 24th International Conference on Ground Control in Mining (ICGCM) 24th Citation Downloads Reference Manager (RIS) SpreadSheed (CSV)

12-10-2020· Highwall mining is a remotely controlled mining method which extracts coal from the base of an exposed highwall. The method has the advantage of low capital cost and less lead time compared with a full underground mine, while being capable of producing in excess of 1 million tonnes per system per year. This method has been used in Australia, USA and India with considerable success.

01-07-2002· Stability analysis, incorporating LMS theory, complements conventional design techniques of highwall mining panels, where mobilised pillar strength is the sole consideration. The stability analysis aims to ensure that the pillars deform in a controlled rather than a violent manner.

The modeling results reveal that stability of open pit slopes have profound influence on the Highwall mining parameters, and the web pillar design can affect the stability of Highwall slopes. In designing Highwall slopes for an open pit, the design must include Highwall mining excavations, otherwise, near critical failure slopes could become critical and fail with Highwall excavations.

Highwall mining is an important surface coal mining method, and it may account for approximately 4% of total U.S. coal production. Highwall stability is the major ground control related safety ...

Technology News 464 - Analysis of Retreat Mining Pillar Stability (ARMPS): Version 4.0 for Windows; Technology News 516 - ARMPS-HWM: New Software for Sizing Pillars for Highwall Mining; Toward Pillar Design To Prevent Collapse of Room-and-Pillar Mines; Using the Coal Mine Roof Rating (CMRR) to Assess Roof Stability in U.S. Coal Mines

01-09-2014· Pillar Stability for Highwall Mining in Single Coal Seam ... Analysis of M SHA accident and injury statistics shows that highwall mining has mai n-tained an admirable safety record.

12-10-2020· Highwall mining is a remotely controlled mining method which extracts coal from the base of an exposed highwall. The method has the advantage of low capital cost and less lead time compared with a full underground mine, while being capable of producing in excess of 1 million tonnes per system per year. This method has been used in Australia, USA and India with considerable success.

Highwall mining is an important surface coal mining method, and it may account for approximately 4% of total U.S. coal production. Highwall stability is the major ground control related safety ...

Highwall mining operation involves driving a series of parallel unsupported, unmanned and unventilated excavations into a coal seam exposed at the open pit Highwall using a remotely operated continuous miner with attached conveying system. These parallel excavations are separated by web pillars of pre-designed width which are critical to the Highwall mining operations.

Highwall mining has become a widely applied method in surface mining. It is commonly used alone or in conjunction with contour or slot mining. It provides 800 to 1,200 ft of additional recovery when, in contour mining, the economic stripping ratio is reached or, in slot mining, when surface access to a reserve is limited.

In this paper, a numerical modelling study to back analyse a highwall instability event in an open pit has been completed. The unstable highwall was over 125 m high and 200 m wide. The overall slope angle was 44°. The highwall instability was detected by slope stability radar and resulted in a multi-bench failure consisting of

Abstract: In this paper, a numerical modelling study to back analyse a highwall instability event in an open pit has been completed. The unstable highwall was over 125 m high and 200 m wide. The overall slope angle was 44°. The highwall instability was detected by slope stability radar and resulted in a multi-bench failure consisting of approximately 3,000,000 t of rock.

mining system is suggested as one of the systems for extracting the coal left around the end-walls. In the highwall mining system, a coal is extracted by using a continuous miner or an auger machine from exposed seams at the base of the open cut operation. The slope stability is the key to the success of highwall mining. However,highwall mining

Pillar Stability for Highwall Mining in Single Coal Seam ... Analysis of M SHA accident and injury statistics shows that highwall mining has mai n-tained an admirable safety record.

Mantos Blancos Highwall Fatality Captioned photos describe this highwall fatality at Mantos Blancos. 104 Kb: Highwall and Portal Safety Bulletin Highwall Stability is the subject of this safety bulletin from MSHA with related best practices. 55 Kb: Highwall and Shovel Safety Bulletin

D. Newman and R. K. Zipf, "Analysis of highwall mining stability-the effect of multiple seams and prior auger mining on design," in Proceedings of the 24th international conference on ground control in mining. Morgantown, 2005. [10] R. K.

01-09-2019· Highwall mining has the potential to reduce highwall stability by weakening and raising the stress levels in the mined coal seam, usually at the base of the highwall. AAI uses Slope-W to evaluate overall highwall stability before and after highwall mining by simulating the weakening of the coal seam based on the extraction ratio [4] .

Highwall mining operation involves driving a series of parallel unsupported, unmanned and unventilated excavations into a coal seam exposed at the open pit Highwall using a remotely operated continuous miner with attached conveying system. These parallel excavations are separated by web pillars of pre-designed width which are critical to the Highwall mining operations.

Highwall mining has become a widely applied method in surface mining. It is commonly used alone or in conjunction with contour or slot mining. It provides 800 to 1,200 ft of additional recovery when, in contour mining, the economic stripping ratio is reached or, in slot mining, when surface access to a reserve is limited.

Highwall stability is the major ground control related safety concern, and operators are required to develop and follow an appropriate highwall mining ground control plan. The plans usually specify the following geotechnical parameters: hole width, maximum hole depth, maximum overburden depth, seam thickness, web pillar width, barrier pillar width and number of holes between barriers.

• Ott Oisalu – stability analysis of the highwall slope in punch-longwall mining using numerical methods, numerical modeling related to highwall stability, determination of optimal and safe barrier pillar dimensions, interpretation of the corresponding results.

mining system is suggested as one of the systems for extracting the coal left around the end-walls. In the highwall mining system, a coal is extracted by using a continuous miner or an auger machine from exposed seams at the base of the open cut operation. The slope stability is the key to the success of highwall mining. However,highwall mining

design of web and barrier pillars at highwall mining operations, is one such approach. The calculated stability factor is compared with empirically established guidelines produced from

mining system and discusses the appropriate highwall mining system in Indonesia including the application of the backfilling system to improve the stability of excavated highwall. 2 Highwall mining systems Many coal seams that are presently uneconomical or technically unsuitable for conventional surface mining techniques can be recovered using ...

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.

Since highwall mining was a new concept, a number ofdifferent methods were investigated in the mid 1990'sto analyse roofstability, Three methods have been used at Moura. • CSIRO developed an analytical method to estimate span stability.