Record Details

Hydraulic properties of a coal-mine overburden and surrounding surficial area

CSIRO RDS Repository

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Title Hydraulic properties of a coal-mine overburden and surrounding surficial area
 
Creator Andrew Wilkins
 
Subject Computational modelling and simulation in earth sciences
Mining engineering
Groundwater hydrology
 
Description This collection contains data concerning the hydraulic properties of the overburden and surrounding surficial area of 34464 underground longwall coal mine scenarios. The hydraulic properties of each scenario are determined via numerical modelling of the strata caving during coal mining. The hydraulic properties are encoded into 9 metrics, including: the immediate-roof permeability, the height above the mining seam at which mining-induced permeability changes are negligible, the average depth of surface fractures and the maximum distance from the longwall perimeter that surface fractures may appear. This collection contains python scripts, which extract the hydraulic property metrics from the raw data and synthesize them, and the results of these scripts are also included.

The reader is referred to acarp.com.au project C33022 for detailed explanation of the motivation, methods, scripts, analysis and results.

Quantifying the hydraulic characteristics of the longwall overburden and surrounding surficial area that is influenced by the longwall extraction is crucial to determining the impact of mining on the local groundwater and surface water systems, understanding water flows to the mine workings and gas flows through the goaf region. Groundwater and surface water impacts are contentious issues for a number of mines in Australia, and quantifying the hydraulic characteristics can assist to reduce controversy from such cases. Similarly, for mines with gas issues, quantifying the hydraulic characteristics allows more accurate estimation of gas flows within the goaf and to drainage boreholes from multiple overlying seams, and a more thorough assessment of gas risks.
This project estimates the hydraulic characteristics of the longwall overburden and the surrounding surficial area. The estimates are provided as formulae that are easily applied to common mining scenarios. Estimates of uncertainty are also provided. It is envisaged that these estimates of hydraulic properties and their uncertainties should be used in groundwater models to determine the influence of mining on the surrounding water systems.

Most likely, you are interested in core_results_description.txt and core_results.tar.gz
 
Publisher CSIRO
 
Contributor Manoj Khanal
Deepak Adhikary
 
Date 2023-10-05
 
Type —
 
Format —
 
Identifier csiro:60082
 
Language —
 
Coverage —
 
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