There are few mining-related operations that have operated for two decades without a lost time injury – but Murray & Roberts Cementation has achieved just that at its grout injection plant between Northam and Thabazimbi in South Africa’s Limpopo province.
The 36 strong team at this grout plant oversees the logistics of mixing on surface, managing over 5 km of pipeline to underground destinations, and injecting grout at the workface to prevent inundation where water is intersected during mine development. Andre van Buuren, Murray & Roberts Cementation Project Manager, highlights the depth of experience that underpins the facility’s safety culture.
“Achieving 20 years without an injury is a real testament to the collective effort of our team, applying our corporate strategies and taking personal accountability for everything that happens on site,” says van Buuren. “It is no coincidence that there is very low staff turnover at this plant – where it is not unusual for our people to have up to 25 years of service.”
The average term of current staff is 10 to 15 years, with Northam injection plant site supervisor Hendry Collins having been with the operation for over 20 years. This has allowed a culture of safety to mature, and to be passed down from the more experienced staff to the newer entrants. Without overloading people with systems and procedures, he explains, everyone is imbued with a commitment to uncompromising safety principles that emphasise personal responsibility. This is expressed in key messages such as “If you see it, you own it” – which hold everyone to an exacting safety standard.
“Everyone is also steeped in the discipline of identifying the highest safety risk in every task they undertake and to ensure that it is mitigated,” he says.
As in any mining environment, this work certainly includes its fair share of risks. The Northam grout injection plant regularly pumps specialised grout mixtures at pressures of up to 10 MPa to underground workings. Over 20 tonnes of cementitious material are commonly injected into designated areas over a three to four day period, according to Murray & Roberts Cementation Senior Project Manager Pieter Oosthuysen. A recent water intersection incident required as much as 56 tonnes to be injected at high pressure to stem the flow of groundwater at a single point.
“A compact surface team oversees the running of the plant, which includes two 100 tonne silos among a range of equipment and backup units,” says Oosthuysen. “Most are part of the underground teams, working in day shifts and night shifts. They follow the mining teams as the mine deepens, extending the grout range to allow injection to be conducted whenever necessary.”
Safety is also a key aspect of the training that injection plant staff receive at the Murray & Roberts Training Academy at Bentley Park near Carletonville. This dedicated training facility includes a mock-up of a grout plant, where the experiential value of the training is enhanced.
Van Buuren highlights the importance of engaging every member of the team in the safety strategies employed, right down to the selection and adoption of protective equipment. In line with regulations and best practice, there is considerable time invested in deciding on even the most appropriate PPE such as boots or glasses to ensure these serve the purpose – before these are rolled out for use.
“This is part of visible leadership, a corporate strategic imperative that provides an example to our younger people,” he explains. “It prevents the ‘old worker’ syndrome where experienced personnel are tempted to take short cuts despite knowing better. Constant reinforcement – including positive recognition – is vital to ensure that complacency never creeps in.”
Louis Neethling, Foreman at the grout plant, emphasises the culture of care which is nurtured within each team – where every member is expected to look after not only themselves but those around them.
“We recognise that promoting safety is rather like sweeping water uphill,” says Neethling. “If you stop sweeping, the water will run back again; it is an ongoing task to ensure safe behaviour, and to find ways of improving safety performance.”
