Current through Register Vol. XLI, No. 50, December 13, 2024
Section 36-7-7 - Safety Provisions - Shortwall Section7.1. All new face roof support units shall be equipped with adjacent unit controls unless units have a wide single canopy over each unit that protects the workman from falling material when operating unit controls from within the support of shield unit being removed.7.2. After the effective date of these rules and regulations all new installed face roof support units shall be equipped with an outlet to facilitate measurement of the yield pressure.7.3. Yield valves of the face roof support units shall be calibrated at least annually within fifteen percent (15%) of the yield pressure specified in the approved roof control plan. A legible record of such calibrations of each valve shall be kept of the surface of the mine for at least eighteen (18) months and be available for inspection by interested persons.