部科院、西南研究所等单位在全断面开挖法中,因炮眼较深,打眼方向要求准确,进口台车系靠人的眼睛瞄准方向,既费时间,也不准确,影响爆破效果。部科院、西南研究所和铁二局第一工程机械厂共同研制了用于全断面钻孔台车的自动平行液压钻臂,经试验达到了予定效果。 每台钻臂有四个 Department of ASTRI, Southwest Institute and other units in the full face excavation method, due to the deep hole, the direction of drilling requirements accurately, the Department of imported trolley aiming at the direction of human eyes, both time-consuming and inaccurate, affecting the blasting effect. ASTRI, Southwest Institute and the first two iron sets of construction machinery factory jointly developed for the whole cross-section drilling trolley automatic parallel hydraulic drill arm, the test achieved the desired results. Four for each boom