2_Bolts.ppt-theMiningQuizList.ppt

Scaling and Bolting or Shotcrete 56 57.3000 Definitions. The following definitions apply in this subpart. Rock burst. A sudden and violent failure of overstressed rock resulting in the instantaneous release of large amounts of accumulated energy. Rock burst does not include a burst resulting from pressurized mine gases. 56 57.3000 Definitions. Rock fixture. Any tensioned or nontensioned device or material inserted into the ground to strengthen or support the ground. Travelway. A passage, walk, or haulageway regularly used or designated for persons to go from one place to another. 56 57.3200 Correction of Hazardous Conditions Ground conditions that create a hazard to persons shall be taken down or supported before other work or travel is permitted in the affected area. Until corrective work is completed, the area shall be posted with a warning against entry and, when left unattended, a barrier shall be installed to impede unauthorized entry. 56\57.3200 PPM 56\57.3200 PPM Cont. 56\57.3200 PPT Cont. 56 57.3201 Location for Performing Scaling. Scaling shall be performed from a location which will not expose persons to injury from falling material, or other protection from falling material shall be provided. 56 57.3202 Scaling Tools. Where manual scaling is performed, a scaling bar shall be provided. This bar shall be of a length and design that will allow the removal of loose material without exposing the person performing the work to injury. 56 57.3203 Rock Fixtures. (a) When rock bolts and accessories addressed in ASTM F432-95, Standard Specification for Roof and Rock Bolts and Accessories, are used for ground support, the mine operator shall-- 56 57.3203 Rock Fixtures. (1) Obtain a manufacturers certification that the material was manufactured and tested in accordance with the specifications of ASTM 432-95; and, Where does MSHA test these bolts? 56 57.3203 Rock Fixtures. (2) Make this certification available to an authorized repres