矿山控制爆破技术在城市地下大断面轻轨施工中的应用

摘要

重庆市渝中区地下大断面轻轨工程,其地上有众多的高大建筑物,地下有防空洞及其设施等的影响,其施工难度较大.采用浅眼密眼、多打眼少装药、较大时差、空眼减震的矿山控制爆破技术,爆破岩石近10万m3,类似工程爆破岩石30余万m3,从未出现过因爆破引发地上众多建筑物开裂或倒塌事故.%The construction of light railway station of large cross-section under the Yuzhong District of Chongqing become very difficult because there are masses of tall buildings above-ground and air defenses under the ground and other ancillary facilities. Nearly ten thousand cubic meters of rock blasting of the light railway station has been accomplished by means of mine controlled blasting techniques such as shallow and dense holes, more holes and less explosive, great time difference and empty holes damping,etc. The similar rock blastings are over 30 cubic meters. But it has never caused masses of buildings crazing or collapsing.