Abstract：The anchoring theory，technology and its application effect on thin-bedded and cataclastic roof are important topics to be studied The geomechanics condition，surrounding rock characteristics and construction method of the starting cut with large section in a fully mechanized mining are introduced. The combination support of high-strength twisted-bar bolt，metal mesh，welded ladder beam，anchor cable channel beam is employed. For cases of this kind，the principles and results of selection of the anchorage materials under this condition are put forward and the determination method and results of the anchorage parameters are also given out by using the engineering analogy based on the classification of surrounding rock stability of roadway and the numerical calculation. The monitoring results for the separation of the roof indicates that (1) the anchoring method and the anchor parameters employed are effective in the control of the deformation and caving of the roof，(2) the roof strata are of the intense deformation in the first 20 days after the roadway excavation and become stable after that，(3) after the first excavation，the roof separation is chiefly the separation in the zone of bolt action，(4) after the side expansion，the roof separation is chiefly the separation in zone of anchoring cable action，(5) The combination support is economical and reliable in safety.
2004, Vol. 23 
