ACARP ACARP ACARP ACARP
Open Cut

Effect of Blasting on Infrastructure

Open Cut » Drilling & Blasting

Published: December 08Project Number: C14057

Get ReportAuthor: Alan Richards, Adrian Moore | Terrock Consulting Engineers

ACARP Project C14057 is an investigation into the effects of blasting on mine infrastructure.  The objectives of the project were to provide:

· A methodology for the assessment of infrastructure types and the establishment of realistic vibration limits for the prevention of damage based on structural integrity and responsible factors of safety;

· A methodology for the establishment of clearance distances to ensure prevention of damage and safety to infrastructure from blast vibration and flyrock; and

· A report giving realistic range of strengths for infrastructure types of concern to the coal mining infrastructure.

The infrastructure types chosen by the advisory committee were:

· Public roads;

· Railway lines;

· Concrete bridges;

· Conveyor structures;

· Power lines with timber poles;

· Power lines with concrete poles;

· Steel transmission pylons;

· Electrical substations;

· Fixed mine plant and industrial buildings;

· Underground workings;

· Pipelines;

· Buried communication cables;

· Dams; and

· Heritage structures.

 

Most of the listed infrastructure is constructed of concrete, timber and steel and the emphasis is placed on these materials.

The methodology for the assessment of vibration limits for the infrastructure items without

further detailed analysis can be summarised as follows:

· Ground motion from vibration results in a deformation of the ground surface that can be expressed as 'strain' within the elastic range of surface movement;

· The ground strain is transferred to structures as follows:

- Buried structures with a reduction of ground strain eg. Buried pipelines, underground workings.

- Elevated structures with a possible increase due to amplification by structure response e.g. buildings, towers.

- Structures sitting on the surface have a direct transfer e.g. roads.

· The strain on some structures can be expressed in strength of material terms which can be compared to working strains permitted by relevant Standards and Codes and used to determine either 'safe' PPV levels or factors of safety for applied limits.

· Ground strain is difficult to measure but it can be estimated from PPV by the following approximations:

- Plane wave strain theory (Dowding)

- Ground deformation (Angular Distortion)

· The amplification of the ground strain by different structures can be conservatively estimated from derived curves.

· Direct measurements of strain on structures usually lie between those given by the two approximations; plane wave strain approximations are usually higher than measured strain;

· The maximum strains on structures can therefore be conservatively determined if the PPV on the ground is known.

· The strains induced can be compared to strength of material methodology or serviceability criteria to determine 'safe' vibration limits to prevent damage.

The recommended 'safe' vibration limits for the infrastructure items investigated are tabulated in the final report.

 

THE FINAL REPORT IS AVAILABLE FROM THE ACARP WEB SITE

Underground

Health and safety, productivity and environment initiatives.

Underground

Open Cut

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

Recently Completed Projects

C19024Establishing Ecologically Sustainable Mine Water Release Criteria In Seasonally Flowing Streams

Extreme rainfall conditions in the Fitzroy Catchment over an approxi...

C25030Coal Mine Open Pit Final Void Closure And Relinquishment - Addressing Uncertainty In Coal Mine Environmental Planning

This report addresses uncertainties faced by coal mine operators whe...

C27046Estimation Of True Deformation Vector From Slope Radar Monitoring

Slope deformation radar monitors are now widely used in open cut coa...

Open Cut

Coal Preparation

Maximising throughput and yield while minimising costs and emissions.

Recently Completed Projects

C27004Improving Coal Flotation With Oscillatory Air Supply

This report provides detailed information on coal flotation with os...

C25018Improving Solids Recovery And Moisture Reduction In Ultrafine Coal Dewatering

This report provides detailed information on fine coal dewatering in...

C27028Lab Froth Flotation Testing Guide With Coal Quality

Correct outcomes from laboratory froth flotation testing in coal bor...

Coal Preparation

Technical Market Support

Market acceptance and emphasising the advantages of Australian coals.

Recently Completed Projects

C26039Nanoporosity In Cokes: Their Origin, Control And Influence On CO2 Reactivity

This project using the outcomes of previous project C24060, examine...

C28063A Comprehensive Technical Review Of High-Efficiency Low-Emission (HELE) Pulverised Coal Combustion Technologies For Power Generation

Research and development has been undertaken worldwide to realise co...

C28064Carbon Structure Transformation During Coking Of Australian Coking Coals: Better Understanding The Coke Formation

Carbon structures of coke that are formed during the plastic layer a...

Technical Market Support

Mine Site Greenhouse Gas Mitigation

Mitigating greenhouse gas emissions from the production of coal.

Recently Completed Projects

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...

C26004CFD Modelling Of Reverse Thermal Oxidisers For VAM Abatement - CFD Modelling Of Fixed-Bed RTO Devices

The project is part of a larger multi‐phase program of study a...

C27058Technological Assessment Of A Recycle Reactor For VAM Abatement

Underground coal mining emits high volumes of methane, diluted in ve...

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