Underground

Aquifer Inflow Prediction above Longwall Panels

Water inflow into coal mines has been a design issue for many years. Guidelines as to the potential for water inflow have been developed in many countries based on local experience and the form of mining being undertaken. In most instances, the guidelines relate to inflows which would endanger ....  read more

Damage Criteria and Practical Solutions for Protecting River Channels

The coal industry is seeking to better understand the nature of mining induced subsidence impacts on river systems and practical ways that these impacts can be managed without unnecessarily sterilising valuable coal resources. To further this understanding, the industry, through the Australian ....  read more

Dust Monitoring Methodology (Inhalable and Respirable Dust Level)

Informative and reliable dust monitoring plays an important role in identifying dust issues in underground coal mines and subsequently the development of effective mitigation strategies. NSW mining industry has a long record of dust sampling provided by Coal Services Pty Ltd. This testing ....  read more

Effect of Longwall Mine Subsidence on Plant Production on Cropping Land

The effect of longwall mine subsidence on crop yield and critical soil factors affecting plant growth were investigated in central Queensland to improve the understanding of subsidence on agricultural production. To achieve this, specific objectives were to:

Effects of Mine Subsidence, Geology and Surface Topography on Observed Valley Closure Movements and Development of an Updated Valley Closure Prediction Method

This report is provided as a set, comprising C8005, C9067 and C18015.

This report combines information that was presented in project reports C8005, C9067 in 2002 reports, presents new valley closure monitoring data and provides information on field work that ....  read more

Effects of Mine Water Salinity on Freshwater Biota: Investigations of Coal Mine Water Discharge in NSW

Seepage of water from aquifers into the workings of coal mines often requires large amounts of water to be pumped to the surface. This water if often used for coal washing with or without augmentation from stormwater. The mixture contains elevated concentrations of dissolved salts and metals ....  read more

Effects of Surface Topography on Mining Subsidence Damage to River Channels

Longwall mining has for some time been recognised to cause perceptible horizontal movements well outside the area of active mining. Substantial coal resources have been sterilised in providing barriers to protect surface features that are sensitive to such movements. This project investigated ....  read more

Environmental Risks of Soluble Hydrolic Oil in Mine Water Discharge

Soluble oil produced from underground coal mines is not an environmental risk unless there is a substantial spill.  Soluble hydraulic oil is an integral component in all longwall coal mining operations and is typically used as a five percent solution with water. The daily quantity used in ....  read more

Feasibility Study of Subsidence Control using Overburden Grout Injection Technology

This project aimed to assess the feasibility  of significantly reducing longwall mining subsidence by applying the overburden grout injection technology originally developed and used in China. A key task of the project was to develop a cost-effective and flexible overburden grout ....  read more

GIS-Based Decision Support Methodology for the Assessment of the Impacts of Mining Subsidence

The objectives of this project were to develop and demonstrate practical decision support methodology for the assessment of the impacts of mining subsidence on natural features. The decision support tools were developed within the flexibility of the Geographic Information System (GIS) ....  read more

Hydrogeological Response to Longwall Mining

Reliable prediction and management of mining induced water inflows and aquifer interference is a major emerging challenge confronting the industry. The Australian coal mining industry is facing intense public and political scrutiny and hence is required to operate with unprecedented ....  read more

Impact of Mine Subsidence on Threatened Ecological Communities

The aim of this project was to develop and implement integrated remote sensing and field survey to quantify the impacts of longwall mine subsidence (LWMS) on Bluegrass and Brigalow, Threatened Ecological Communities (TEC). The methods and results are anticipated to permit broader extrapolation ....  read more

Impacts 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 & C18015

ACARP Has funded work since March 1999, in order to gain a better understanding of the impacts of underground coal mining on creeks, river valleys, gorges and clifflines. The research work was funded in two stages and the ....  read more

Impacts 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 & C18015

Since March 1999, original research work has been carried out to study the impacts of underground coal mining on creeks, river valleys, gorges and clifflines.

Numerous longwall extractions have already been ....  read more

Managing and Conserving Native Plant Species in the Mining Environment - Seed Germination Biology and Alternative Ex Situ Storage of Persoonia Germplasm for Restoration

The results outlined in this report reflect the unique research focus of this project: identifying the requirements for ex situ germination, propagation and storage of germplasm of the genus Persoonia. Until recently, this information was largely unknown, precluding these important ....  read more

Monitoring Ground Subsidence due to Underground Mining Using Integrated Space Geodetic Techniques

Mine subsidence is the lowering or collapse of the land surface, caused by underground mining activity. Mine subsidence is of major concern to the coal mining industry, government regulators, and environmental groups.

Subsidence is currently monitored by repeated ground survey ....  read more

Monitoring Surface Condition of Upland Swamps Subject To Mining Subsidence with Very High-resolution Imagery

The project investigated the potential of small UAV platforms to capture imagery of the shrub swamp communities to develop monitoring tools for detecting change in condition and composition that may be correlated to the impacts of longwall underground mining.

The project demonstrated ....  read more

Monitoring the Effect of Longwall Mine Subsidence on Native Vegetation and Agricultural Environments

The aim of this project was to develop methods and tools to assist the coal industry to better monitor the consequences of longwall mine subsidence (LWMS) on surface environments.  The project focus was to improve monitoring quality and potentially reduce costs through the incorporation of ....  read more

Reducing the Impact of Longwall Extraction on Groundwater Systems

The Australian coal mining industry is under increasingly intense public and political scrutiny because its license to operate is linked with unprecedented social and environmental accountability. Much of this accountability is associated with water management to ensure that the mine operations ....  read more

Remediation of Saline Water from Coal Mining

The overall objective of this scoping study is the identification of an affordable process which will treat the typical saline water produced by the coal industry. The process may produce water of quality suitable for use or discharge and provide a disposal solution for the contained salts. ....  read more

Review of Industry Subsidence Data in Relation to the Influence of Overburden Lithology on Subsidence and an Initial Assessment of a Sub-Surface Fracturing Model for Groundwater Analysis

A detailed review of available mine subsidence data collected over longwall panels within the Newcastle Coalfield and an empirical subsidence prediction methodology has been developed by Strata Engineering (Australia) Pty Ltd.

The subsidence review included the collation of ....  read more

Techniques to Predict and Measure Subsidence and Its Impacts on the Groundwater Regime above Shallow Longwalls

This project investigated cracking associated with shallow longwalls using case studies from Beltana and Crinum Mines. The project trialed a number of techniques to measure the onset of subsidence and its impacts in terms of cracking.

The combination of tilt meters attached ....  read more

The Prediction of Mining Induced Movements in Building Structures and the Development of Improved Methods of Subsidence Impact Assessment

Original research work has been underway since March 2003, in order to gain a better understanding of the impacts of underground coal mining on building structures.

The major aims of this research project were to develop improved methods of assessing the likely damage to building ....  read more

Tracer Gas to Measure Vertical Overburden Conductivity Above Extraction Panels

Longwall coal mining at shallow depths has many mining and environmental issues related to subsidence.  The issues range from mining impacts caused by ventilation and spontaneous combustion to environmental impacts created from the release of goaf gas and hydrological issues.  A ....  read more

Understanding the Biology and Ecology of Vulnerable Plant Species: Case Study with Tetratheca Juncea occurring over Coal Leases

Tetratheca juncea Smith (Tremandraceae) is a vulnerable species listed under the NSW Threatened Species Conservation Act (Schedule 2, TSC Act 1995), and in the Commonwealth Environment Protection and Biodiversity Conservation Act 1999. The species occurs on the central coast of New South Wales ....  read more

Utilising Flyash Paste Backfill

Society is in transition to a policy of sustainability - a long term approach that emphasises the efficient use of resources. To continue in business and minimise the negative commercial impacts of Government policies and taxes, industry has to engage its stakeholders and develop technologies ....  read more