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• e. The automated temporary support system shall be placed firmly <br />against the roof not more than 6 feet inby the last row of <br />permanent supports, before any person proceeds inby permanent <br />support. <br />f. There will be nc installation of roof bolts inby the temporary <br />roof support. <br />g. The controls necessary to position and set the automated support <br />shall be located in such a manner that they can be cperated from <br />under permanent support. <br />h. A check valve or equivalent protection shall be incorporated in <br />the automated temporary support system to eliminate the danger <br />of collapse through sudden loss of hydraulic fluid from a broken <br />hose. <br />i. The temporary roof supports as required in the approved roof <br />control plan do not apply where the roof bolting machine is <br />equipped with the acceptable ATRS system. This does not <br />preclude the use of temporary supports where needed to make <br />necessary tests or for ventilation purposes. <br />j. The drawing in figures K-4 and K-5 shows how the ATRS system <br />shall be positioned and repositioned as bolting progresses, and <br />shows the sequence of installation of roof bolts in a typical <br />• face area. <br />k. It should be noted that certification or approval of an ATRS by <br />equipment manufacturers does not constitute approval of an ATRS <br />system in lieu of temporary supports. Dnly the District Manager <br />or his representative can approve an ATRS system in lieu of <br />temporary suppcrts. <br />22. The following procedure will be used for pre-bolting overcasts (refer <br />to figure K-7): <br />a. Drill the bolt hale to proper depth. Holes should be en 5' <br />centers as described for roof bolts in the roof plan for the <br />mine. <br />b. Insert the proper number of resin cartridges and push them to <br />the top of the hole. <br />c. Insert resin bolt with coupling and spin-in bolt into hole. <br />Installation then follows resin manufacturers' recommendation as <br />to spinning and holding time. <br />d. The spin-in bolt is then disengaged from the coupling ana <br />removed. A short dummy can now be placed in the hole to protect <br />the coupling. The explosive can then be placed in the hole <br />below the dummy, <br />-g- <br />