复杂岩溶隧道开挖中的光面爆破施工技术

隧道施工中光面爆破是根据隧道地质条件,通过精心设计、施工,严格控制爆炸能释放过程和介质破坏过程,达到预期的爆破效果。光面爆破技术最显著的优点是能控制周边眼炸药的爆破作用,从而减少了对围岩的扰动,保持了隧道围岩的稳定性。就宜万铁路金子山隧道不同地质条件、不同级别围岩(Ⅲ级、Ⅳa级)开挖施工中的光面爆破技术进行了详细介绍,讨论了光面爆破在各种围岩类别中的爆破参数、施工工艺及爆破效果。金子山隧道的施工实践表明,采用合理的光面爆破参数,爆破效果好、安全,而且可减轻隧道的劳动强度、加快工程进度、降低了工程成本,并保证了工程质量,金子山隧道的成功经验可为类似复杂地质条件和围岩情况的隧道施工提供有益的帮助和参考。

Smooth Blasting Technique in Excavation of Carst Tunnel under Different Geological Conditions

In the tunnel construction,the smooth blasting achieves the desired effects according to the tunnel geology condition,and through the careful design and construction,strict control for the explosive energy releasing process and the medium damage process.Its most significant advantage is to be able to control the blasting explosives in peripheral holes to reduce the disturbance of the surrounding rock,and maintain the stability of the tunnel rock.The smooth blasting technique under different geological condi...