ACARP ACARP ACARP ACARP
Underground

Intelligent Drilling Systems

Underground » Geology

Published: August 07Project Number: C14034

Get ReportAuthor: Scott Thomson, S Adam | CoalBed Concepts, CRCMining

Inseam directional drilling plays an important role in Australian underground coal mining for coal seam degasification purposes. The path of an inseam borehole is also of interest from an exploration perspective but too often the geological data from inseam boreholes remains ambiguous and of uncertain value.  Providing a quantitative means of measuring formation properties through inseam logging is clearly a desirable outcome and will have important implications for improving the confidence of the mine planning process.

This project tested the most suitable available downhole logging systems in a highwall and Medium Radius Surface to Inseam borehole.  Sites were provided at Anglo Coal’s German Creek Mine (from a highwall) and at BHPB Illawarra (Surface to Inseam). Significant engineering modifications were necessary to prepare the sensors for logging deployment in Australian conditions.  This was particularly so for the Medium Radius Surface to Inseam application.

The benefits of geophysical logging an inseam borehole are self evident and detailed herein.  The logging systems demonstrated have identified geological structures (particularly dykes) and provided unequivocal data that confirms the position of the drill hole in relation to seam roof and floor. The unsuitability of current systems for deployment in the range of inseam drilling applications is demonstrated and a conceptual design for the next generation of logging tools is presented.  The project has established what can be achieved from geophysical logging of inseam boreholes and identified the inadequacies of current practice.  An incremental program of development is required to bring Australian inseam drilling up to oilfield standards at a fraction of the cost of using systems available from the petroleum sector.

This project has also resulted in the development of drill rig performance monitoring systems, in particular the ‘P Logger’ (a means to measure downhole annular pressure) and the Torque / Thrust Sensor (located at the borehole collar). Both these systems have provided excellent results, and at time of writing are being used in active directional drilling projects in Australia.  Both tools are in a near-commercial state.

The main objective of this program of work was “to develop prototype instrumentation to collect, analyse and display real-time and post-drilling measurements of important drill and geophysical parameters”.  This objective was only partially met.  Prototype instrumentation was developed for drill rig performance monitoring and a conceptual design developed for a geophysical logging tool capable of deployment in a range of inseam drilling conditions.

After review of the initial results from field trials, it was clear that funds were insufficient to build a prototype geophysical logging tool with the kind of features desired, and as a result the manufacturing focus shifted to the development of rig performance monitoring systems, supported partially by additional funds obtained from a drilling company.  In addition it became clear that further work was required to determine exactly what kind of geophysical logging tool needed to be built to satisfy the requirements of the Australian coal mining industry.  It was decided to concentrate on a comprehensive field program for geophysical logging (inseam and surface to inseam), the conceptual design of a new “Super Tool”, and the development of the aforementioned rig performance prototype systems.

A direct result from this project is a conceptual design for a logging tool that is suitable for deployment in the range of Australian inseam drilling conditions encountered. The manufacture of this geophysical logging tool is part of a new and current ACARP Project (C16018, Advanced Logging Systems).

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