J-PAK
® Cribs are a standing support product that utilizes a custom-made steel shell filled with a specialized cement. J-PAK is designed to slowly yield under rock load.
Features
• Available in corrugated (J-PAK I) or smooth (J-PAK II) steel shells
• Easily installed in various mine conditions
• Designed to slowly yield under rock load
• Available in 18–36" (457–914 mm) diameter steel shells
Advantages
• Replaces conventional timber cribs in longwall tailgates and bleeders
• Sustains peak capacity during yielding
• Stable and high yield performance
• Withstands lateral displacement