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' - <br />' accomplished by drilling inclined drill holes from within the <br /> mine portals which would intercept joints and fractures in the <br />' <br /> area of conce rn above the fan portal . <br /> <br /> Concerning relocation, it might be feasible to consider moving <br />1 the fan to a more protected location and either combining it with <br /> the existing entry and belt portals or possibly ramping up from <br />' <br /> the lower B seam level with the portal, again, moved to a <br />' protected location immediately downslope of the existing entry <br />and belt portals. <br />1 <br />' With regard to the debris flow chute located between portals, the <br />major concern is one of safety. Consideration can be given to <br />' providing for alternative means of access to the mine bench from <br />a more protected position. Measures directed at arresting and <br />' storing debris flow events above the mine bench are felt not to <br />be feasible due to the li mited access and limited space available <br />t above the bench. It may be possible, however, to consider <br />t installing a structure which would carry debris flow events past <br /> the upper mine bench w here they ma y be arrested and temporarily <br /> stored on the next two lower bench levels. Such a scheme would <br /> involve taking men and equipment through a short section of <br />' l li <br />t <br />i <br />hi <br />h ld th <br />" <br />h <br />h <br />d t <br />t <br />" <br /> unne <br />ng w <br />n <br />c pass <br />wou roug <br />a <br />s <br />e s <br />ruc <br />ure <br />' designed to extend the debris flow chute beyond the u pper bench. <br />' Of course, one additional alternative, as long as safe access of <br />men and equipment can be maintained, is to do nothing and deal <br />1 <br />1 8 <br />