ACARP ACARP ACARP ACARP
Underground

Automatic Real Time Assessment of Windblast Risk

Underground » Strata Control and Windblasts

Published: June 02Project Number: C8026

Get ReportAuthor: Van Zyl Brink, AR Newland | Snowden Associates

The main objective of this project was to automatically assess the risk of experiencing a windblast in a longwall operation. The logical extension of the risk assessment was the automatic generation of an alarm should the risk exceed pre-determined levels.

Certain conditions need to be present to experience windblasts of an intensity that threatens the safety of the underground operator. These conditions include the geological configuration and the dimensions of the mining excavation (mine layout). Mine planning and operation constraints provide limited flexibility in preventing or controlling the occurrence of large goafs and subsequent windblasts.

Windblast early warning is being achieved at Moonee Colliery. The early warning system has proved to be an effective operational tool. This project endeavoured to provide the methodology to automatically generate windblast early warning alarms. The windblast problem at Moonee, the management and effectiveness of the seismic system and the recorded data were used as the basis for developing and evaluating the automatic early warning methodology.

The report describes the installation of the seismic system and the operator-based real time application of the ISS-stability concept. This concept was first coded into a threshold-based decision tree in an attempt to duplicate the decisions made by the on-site operator. Individual early warning parameters were tested. These parameters were: the precursive event rate; changes in the volume of coseismic inelastic strain (Apparent Volume); and the comparison of radiated energies of seismic events of similar moments. It was found that the precursive event rate was the most reliable parameter.

In order to show clearly that the seismic response to mining, as reflected by these seismic parameters, exhibits an early warning to a pending large instability in the roof, a probabilistic risk-assessment approach was developed and tested. An off-the-shelf expert system was used as the basis for applying a probabilistic philosophy in risk assessment. The result was an early warning system more effective than the threshold-based decision tree concept and as effective as the full-time operator.

The report also describes the attempt to normalise the seismic parameters to the production in a way other than through a temporal reference. The use of the automatic risk assessment in parallel with control measures, such as the hydrofracturing initiation of goafing, is also described.

The report concludes with recommendations on further development, testing and implementation of the expert system philosophy in automatic assessment and recognition of windblast risk.

The CD also contains the software developed at Moonee to undertake the automatic event forecasting function.

Underground

Health and safety, productivity and environment initiatives.

Recently Completed Projects

C20003RISKGATE

DO NOT CLICK GET REPORT- THE OUTCOME OF THIS PROJECT IS A WEB SIT...

C21011Development Of New Testing Procedure For The Assessment Of Resin Performance For Improved Encapsulated Roof Bolt Installation In Coal Mines

In underground coal mining, the resin bond between the rock bolt and...

C8005Impacts Of Mine Subsidence On The Strata & Hydrology Of River Valleys: Management Guidelines For Undermining Cliffs, Gorges & River Systems

THIS REPORT IS PROVIDED AS A SET, COMPRISING C8005, C9067 & C180...

Underground

Open Cut

Safety, productivity and the right to operate are priorities for open cut mine research.

Recently Completed Projects

C17034Dragline Machine House Dust Control

A study has been undertaken into the performance of dust filtration ...

C21043Integrated Forward And Reverse Osmosis System For Mine Water Reuse

Mines across Australia face enormous water challenges and desalinati...

C21037Managing Mine Water Under Extreme Climate Variability

This report describes the technologies for exploring management stra...

Open Cut

Coal Preparation

Maximising throughput and yield while minimising costs and emissions.

Recently Completed Projects

C21047Seal, Spray And Wash Water Filtration In Coal Preparation Plants

The objective of the study was to undertake a review of seal, spray ...

C21055Advanced Dynamic Control For Paste Thickeners - First Stage For Control Of Complete CHPP’S

Paste thickeners produce significantly higher solids underflow conce...

C23034Comparison Of Column And Mechanical Flotation Technologies

Fine coal beneficiation is virtually essential for coking coals unle...

Coal Preparation

Technical Market Support

Market acceptance and emphasising the advantages of Australian coals.

Recently Completed Projects

C25043The Strength Of Interfaces In Metallurgical Coke And Its Influence On Coke Abrasion

This project applied tribological and scratch testing techniques to ...

C12004Coke Reactivity Test: Critical Parameters

A Draft International Standard ISO/DIS 18894 has been prepared title...

C12073Accurate Instrumental Determination Of Carbon In Coal

Traditionally, thermal coal has been traded with its value being pri...

Technical Market Support

Mine Site Greenhouse Mitigation

Mitigating greenhouse gas emissions from the production of coal.

Recently Completed Projects

C17058Gas Emission Expert Model For Abandoned Coal Mines

This project is a continuation of ACARP Projects C13007 and C14080 (...

C19054VAM Enrichment With A Two-Stage Adsorption Process

Treatment of ventilation air methane (VAM) with cost-effective technolog...

C24017Improving Methods For Quantifying Fugitive Emissions From Open Cut Coal Mining

Fugitive emissions from open cut coal mines are usually estimated fo...

Mine Site Greenhouse Mitigation

Low Emission Coal Use

Step-change technologies aimed at reducing greenhouse gas emissions.

Recently Completed Projects

C17060BGasification Of Australian Coals

Four Australian coals were trialled in the Siemens 5 MWth pilot scale ga...

C17060AOxyfuel Technology For Carbon Capture And Storage Critical Clean Coal Technology - Interim Support

The status of oxy-fuel technology for first-generation plant is indicate...

C18007Review Of Underground Coal Gasification

This report consists of a broad review of underground coal gasification,...

Low Emission Coal Use

Mining And The Community

The relationship between mines and the local community.

Recently Completed Projects

C16027Assessing Housing And Labour Market Impacts Of Mining Developments In Bowen Basin Communities

The focus of this ACARP-funded project has been to identify a number...

C22029Understanding And Managing Cumulative Impacts Of Coal Mining And Other Land Uses In Regions With Diversified Economies

The coal industry operates in the context of competing land-uses that sh...

C23016Approval And Planning Assessment Of Black Coal Mines In NSW And Qld: A Review Of Economic Assessment Techniques

This reports on issues surrounding economic assessment and analysis ...

Mining And The Community

NERDDC

National Energy Research,Development & Demonstration Council (NERDDC) reports - pre 1992.

Recently Completed Projects

1609-C1609Self Heating of Spoil Piles from Open Cut Coal Mines

Self Heating of Spoil Piles from Open Cut Coal Mines

1301-C1301Stress Control Methods for Optimised Development...

Stress Control Methods for Optimised Development and Extraction Operations

0033-C1356Commissioned Report: Australian Thermal Coals...

Commissioned Report: Australian Thermal Coals - An Industry Handbook

NERDDC