<p>A mine roof bolt includes an elongated rod and a polymer coating layer. The elongated rod has a first end and a second end with a protruding portion extending radially outward from the elongated rod. The polymer coating layer covers at least a portion of the elongated rod between the first and second ends. The elongated rod is movable relative to the polymer coating layer in an axial direction. The elongated rod has a first position where the elongated rod has a predetermined axial position relative to the polymer coating layer and a second position where the elongated rod has a displaced axial position relative to the first position.</p>
申请公布号
WO2011028790(A1)
申请公布日期
2011.03.10
申请号
WO2010US47512
申请日期
2010.09.01
申请人
FCI HOLDINGS DELAWARE, INC.;OLDSEN, JOHN G.;WU, YAOKUN;LAMOTHE, MARC W.