Content Hub

Keep up to date with our Content Hub for engaging thought leadership industry news and GeoSLAM updates.

Q&A with Bert Meuleman, GeoSLAM Belgium dealer

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reykjavik

GeoSLAM goes North with new dealer in Iceland

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Autonomous Mapping in Harsh and Hostile Environments

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GeoSLAM Partners with Microsol Resources

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real estate

GeoSLAM helps leading media company Zien24 revolutionise their digital workflow

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New partnership for GeoSLAM and NORMET

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Senior Promotion to bolster GeoSLAM growth

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Home renovation made easy with the ZEB Family

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GEO Business and SPAR 3D Expo: A tale of two events

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Getting to know you: Abhishek Bhartiya

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GeoSLAM expands service centre in France with Geomesure

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zeb horizon manhole

Safe, fast data capture with ZEB REVO on waste management project

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The Dos and Don’ts of Aerial Surveying

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Experience Strongest Ever SLAM with our upgrade campaign

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GeoSLAM responds to the Geospatial Commission

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Attracting and Retaining the Next Generation of Talent

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Global expansion on the horizon for GeoSLAM

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GeoSLAM feature on NatWest Business Hub

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GeoSLAM Welcomes CSIRO Visitors to UK HQ

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GeoSLAM providing inspiration in maths

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GeoSLAM mobile technology features in Science Channel Series in the US

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GeoSLAM launches new ZEB-HORIZON 3D Mobile Scanner

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zeb revo rt scanning

GeoSLAM Launches Game-Changing Technology in the UK during Digital Construction Week

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Importance of safety berms at dump sites

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KTP Case Study: Predictive Monitoring of Rail Infrastructure

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Scanning through wire mesh with SITEMONITOR LIVE

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PROCESSMONITOR LIVE shotlisted for Tunnelling Award!

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Automated Stockpile Volume Monitoring

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3D Laser Mapping & GeoSLAM Global Merger Announced

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GeoSLAM’s CSR Strategy to Promote Students’ English Skills

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The benefits of measuring Shotcrete during application

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GeoSLAM to Demo Fast, Easy and Versatile 3D Mobile Laser Scanning at 2018 SPAR3D Conference

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GeoSLAM to showcase the Future of Construction at Geo Business 2018

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GeoSLAM take Geoterra to new heights with ContextCapture Solution from Bentley

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GeoSLAM announces distribution agreement with Cansel in Canada

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GeoSLAM and Corporate Social Responsibility

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GeoSLAM Academy Events prove a hit with customers

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Quickly and Safely Mapping our Underground World

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GeoSLAM announces UK distributor agreement with KOREC

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GeoSLAM celebrates 5 years in business with new HQ, record growth

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GeoSLAM Launch Time & Cost Saving 3D Mobile Laser Scanners at Dallas Fall BIM Forum 2017

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GeoSLAM and Bentley Systems join forces to take mobile reality modelling indoors

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GeoSLAM Changing The Economics of 3D Laser Scanning with new product launches at INTERGEO

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Verity – GeoSLAM Collaboration Advances Real-Time Construction Quality Management

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Reducing Scanning Time of Historic Sites from Weeks to Hours

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Record Six Months for GeoSLAM Thanks to Boom in Digital Engineering

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GeoSLAM Unveils Predictions for Engineering’s Digital Future

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University Challenge: To Deliver Rapid 3D Results in Half the Time

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GeoSLAM Global Network Expands Both East and West

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GeoSLAM to feature in upcoming BBC Show Countryfile

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Making Forest Surveys a Walk in the Park

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GeoSLAM signs up Seiler Instrument for Midwest USA Distribution

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shanghai

GeoSLAM Expands Far East Operations with New Distributors

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GeoSLAM Announces Real-Time Upgrade For ZEB-REVO

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Danish Distributor Attends Annual Surveying Congress

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GeoSLAM Scores Top Marks at Century Old School

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Rapid Mobile Scanning for As Built Building Surveys

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Taking care to save costs and minimise disruption without compromising accuracy

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The Future of Hazardous Unmanned Mobile Mapping

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GeoSLAM Launches Zeb Cam for Zeb Revo

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GeoSLAM and Blackdog Robotics sign partnership agreement to supply unmanned mobile indoor mapping solutions

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GeoSLAM Zeb Revo Shortlisted for Wichmann Awards

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ZEB1 makes history, mapping Brei Holm for BBC’s ‘Coast’

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OPTRON Appointed as GeoSLAM Dealer for Sub Saharan Africa

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GeoSLAM Announces Global Distribution Agreement for 3D Reshaper & PointCab

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Laser Scanning the Rising Star Cave in the Cradle of Humankind, South Africa

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Engineering results ten times faster than traditional survey methods

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The benefits of measuring Shotcrete during application

Ground support operations are critical in most underground mines, not only for the longer-term durability of tunnels, but also for the immediate safety of people working in new drives who may be conducting various operations at a heading or barricade.

Shotcrete has been used for decades either solely, or in combination with other stability support methods, such as mesh and rock bolting. Shotcreting must be applied to specification for safety and commercial reasons, and making sure there is a real-time, safe and ‘hands-off’ way to ensure thicknesses are correct has many advantages.

Traditional shotcrete thickness measuring techniques have been fraught with issues. Various methods such as:

  • Stamps
  • Probes
  • Fixed volume used
  • Covering the mesh or measuring rods
  • ‘Eye-balling it’
  • None

These methods suffer from some or all the many problems associated with reduced safety, material wastage and the length of time taken to measure the applied thickness.

Using stamps may bring inconsistent results if their placement is incorrect, biased or simply too few. They do not provide a digital, traceable, record of the location or thickness of measurements collected. Probes have similar issues and in addition may not actually be used until some hours after the shotcreting rig has moved on, increasing the cost to return if too little has been applied, (or worse a safety issue if it does not return at all), or material wastage if too much has been sprayed.

In some mines a fixed volume of shotcrete is provided using a theoretical calculation of the requirement. This is loaded to the sprayer and once it is used then no further application is made. This however has possible disadvantages with uniformity and excess rebound. If the objective is purely to cover the mesh, rockbolts, or any placed measurement rods to determine the thickness of shotcrete applied, this works until the item is covered at which point the amount by which it is covered becomes indeterminate by default, leading to possible excess material.

Many mechanised shotcrete rigs are operated by very experienced personnel who are sometimes left to spray exact thicknesses by eye. However, since under-spraying can be a safety or regulatory issue and over-spraying a commercial loss, almost all operators need additional guidance to differentiate between applying set thicknesses of only a few millimetres.

Laser scanner based shotcrete thickness measuring systems fortunately provide:

  • a safe,
  • simple to use,
  • real-time,
  • accurate,
  • digital technique to measure sprayed concrete in combination with mechanised sprayer units.

The thickness measuring process with the laser scanner is a ‘non-contact system’ whereby the laser scanner taking measurements is located away from the area to be stabilised. This removes the need for manual measurements to be taken in un-stabilised areas or on newly sprayed areas that may suffer from fall outs causing injuries. The system is operated in real-time by the sprayer ‘nozzleman’ negating the need for additional personnel or technical staff, and the easy to learn process and simple operation is done with a single button push.

Laser scanning technology has been used for mapping and monitoring since the 1990’s and has come to be appreciated for the high volume of accurately measured data created. The applied shotcrete thickness, as mentioned, is critical for safety and cost reasons and even a few millimetres less or more, can have serious consequences, so accurate measurements acquired on-site are important to the process. After the spraying is complete, as the data is digital, various reports and information may be produced immediately. Not only the placement and thickness is recorded but also the volume of material is calculated, a useful quality control check. Both client and contractor can see and agree on contractual specifications being met and a digital archive created for quality assurance purposes.

Modern efficient shotcrete thickness measuring systems therefore have numerous benefits;

  • reducing job time by improving efficiency of the process
  • lowering direct costs by reducing material wastage, and personnel and machinery time
  • generates digital data which can be used to show compliance with specifications
  • increases safety by operating the system remotely from the shotcrete application area
  • is very simple and easy to learn and use.

For mines using even moderate quantities of shotcrete, the savings of applying the correct thickness can be enormous, leading to a short return on investment. That coupled with enhanced safety makes the choice of a real-time laser based measuring solution highly attractive.