ACARP ACARP ACARP ACARP
Underground

Source of Hydrogen in Longwall Goaf Areas: An Experimental Study Utilising Hydrogen Isotopes

Underground » Communications

Published: June 01Project Number: C8020

Get ReportAuthor: Alan Trevisiol, Sue Golding | North Gooyella Coal Mines, University of Queensland

ACARP levy contributors should order this report in the normal manner - by clicking 'get report'. As this report is available free of charge to everyone, all others please contact nicole@acarp.com.au.

In coal mine goaf gas samples the detection of significant concentrations of hydrogen accompanied by carbon monoxide and hydrocarbons is usually a cause for alarm because it is conventionally understood to indicate that there is a well advanced heating taking place in the goaf. Hydrogen is understood to be one of the gases evolved from coal that is being heated at elevated temperatures. From time to time however, in some Australian coal mine goaf gas samples anomalous high concentrations of hydrogen have been detected without accompanying high concentrations of carbon monoxide and hydrocarbons, thus raising questions about the source of this hydrogen. Possible alternative sources of hydrogen in goaf gases could be acid water on metal reactions, partially combusted diesel fuel in engine exhaust gases and perhaps even as a naturally occurring component of some seam gases.

This project was a first trial of using hydrogen isotope ratio analysis methods to determine if they could differentiate between hydrogen samples generated from acid-metal reactions, coal being heated, and from diesel fuel combustion. The work was carried out in the Stable Isotope Geochemistry Laboratory at the University of Queensland under sub-contract arrangements with the North Goonyella Coal Mines Limited.

The study showed that isotope ratio analysis could readily distinguish hydrogen produced from acid-metal reactions from hydrogen produced by combustion of coal or diesel fuel. However, used in isolation, the technique could not differentiate between hydrogen produced from combustion of coal and diesel fuel because there was insufficient difference in the isotope compositions from these organic sources.

Underground

Health and safety, productivity and environment initiatives.

Recently Completed Projects

C27039True Triaxial Strength Of Coal Measure Rocks And Its Impact On Roadway Stability And Coal Burst Assessment

Rocks in the ground are subject to a range of stresses. The stresses...

C3063Underground Vehicle Design Standards And Statutory Implications

The Australian underground diesel vehicle fleet has evolved since di...

C3064Conveyor Belting And Lagging Shear Characteristics - Drive Drum Slip

The primary aim of this project was to investigate the relationsh...

Underground

Open Cut

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

Recently Completed Projects

C26029Geological Controls On Fluorine And Phosphorus In Bowen Basin Coals

Increasing global restrictions on fluorine in product coal prompted ...

C28033Raw Ash To Yield Relationships

Correct outcomes in yield predictions for product ash from coal bore...

C27038Establishing Self-Sustaining And Recognisable Ecological Mine Rehabilitation

In recent years an increasing interest has been placed on mining ope...

Open Cut

Coal Preparation

Maximising throughput and yield while minimising costs and emissions.

Recently Completed Projects

C27064Dry Beneficiation Using FGX And X-Ray Sorters

Conventional dry processing methods engage a single beneficiation de...

C26010Multi-Sloped Screening Efficiency With Changing Strokes, Frequencies, Feed Solids And Feed Rates-Pilot Plant Study

Optimising multi-sloped screens is often described as an art and the...

C28059Impact Of Water Quality In Coal Handling And Preparations Plants

The objective of this project was to deliver a concise reference do...

Coal Preparation

Technical Market Support

Market acceptance and emphasising the advantages of Australian coals.

Technical Market Support

Mine Site Greenhouse Gas Mitigation

Mitigating greenhouse gas emissions from the production of coal.

Recently Completed Projects

C23052Novel Stone Dust Looping Process For Ventilation Air Methane Abatement

This multi‐phase project is concerned with the mitigation of m...

C27054Optimisation Of A Thermal Flow Reversal Reactor For Ventilation Air Methane Mitigation

Ventilation air methane (VAM) generally accounts for 50-85% of the t...

C28076Selective Absorption Of Methane By Ionic Liquids (SAMIL) - Phase 2 Demonstration In A Packed Bed Reactor

An alternative approach to high temperature oxidation of ventilation...

Mine Site Greenhouse Gas 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