Machines for underground mines - Safety requirements for hydraulic powered roof supports - Part 3: Hydraulic and electro hydraulic control systems

This document establishes essential safety requirements for mechanical equipment utilized in underground mining operations, specifically focusing on clamping devices equipped with hydraulic drive systems. The content addresses the third segment of a comprehensive series, detailing the technical specifications for hydraulic and electro-hydraulic control systems integrated into such machinery. It outlines critical design principles, operational guidelines, and protective measures intended to ensure the safe functioning of these complex systems within the demanding environment of underground extraction sites. The provisions cover aspects related to control logic, pressure management, safety interlocks, and system reliability to mitigate risks associated with hydraulic failures or improper operation. By defining clear performance criteria and testing methods, this specification aims to support manufacturers and users in maintaining high levels of operational safety. It serves as a technical reference for engineering teams involved in the development, maintenance, and inspection of underground mining equipment, ensuring that control mechanisms meet rigorous industry standards for hazard prevention and risk reduction in confined subterranean spaces.