STUDY ON CONTROLLING MECHANISM OF SURROUNDING ROCKS OF GOB-SIDE ENTRY WITH COMBINATION OF ROADSIDE REINFORCED CABLE SUPPORTING AND ROADWAY BOLT SUPPORTING，AND ITS APPLICATION
Abstract：The gob-side entry retaining technology is widely used in the thin or medium thick coal seam，but rarely employed in the over-3-meter mining-height working face. The reasons mainly lie in the following two aspects: firstly，the traditional mechanical model for the gob-side entry is unsatisfactory and secondly，the roadway and roadside supports are unreasonably placed. By taking into consideration of the bearing capacity of rocks，this paper presents a reinforced active supporting technique，consisting of the cable-reinforced roadside supporting technique and the roadway bolt-supporting technique. For practical purpose，a new mechanical model is established，taking into account both the roadside coal bearing capacity and the reinforcing effects of the roadside cable-support. The improved supporting mechanism with the combination of the roadway bolt-supporting technology and the reinforced roadside cable supporting technology is analyzed. The results are applied successfully to the design and engineering practice in the airway of the high working face No. 3625 of Zhuzhuang Mine，Huaibei. The research result provides a theoretical basis and some useful experience for the gob-side entry retaining work of large mining-height working faces.
