Big C Rock Engineering was founded by Pierre Christiaan Cronjé after he obtained his professional Rock Engineering qualification in 2000. Pierre has vast experience in the most challenging mining environments in South Africa and abroad.

Pierre established a conclusive training initiative, hence the rapid expansion of Legal Rock cc as a training provider. As mine Health and Safety experts, Legal Rock implemented an outcome-based training solution.

Legal Rock cc has been awarded the ISO 9001 certification, and is in the process of attaining its MQA accreditation.

Our vision is to become the leader in providing an efficacious Rock Engineering Support Service to the coal mining industry.

Our mission is to provide a comprehensive Rock Engineering service to our clients by using practical and site-specific Rock Engineering solutions. We intend to achieve this by implementing safe, state of the art techniques, while working in conjunction with our clients’ needs.


Numeric Modeling

Numeric Modeling

Slope & Support Designs

Support recommendations

Investigations of Fall of Ground (FOG) accidents and Slope Failures

Routine Underground and Opencast Risk Assessments

Drafting of Code of Practice with relation to the Mine Health & Safety Act

Short Encapsulation Pull Test

Slope Monitoring

Geotechnical Core Logging

Geotechnical Rock Testing

Quality Control on Support

Baseline Risk Assessments

Gas Testing

Input on Monthly Planning meetings.

Input in Mine Design meetings

Full spectrum of Geology services

Full spectrum of Geophysical services