China Railway Three Bureau Group East China Construction Co. , Ltd.

为实现复杂环境下铁路缓边坡的光面爆破设计优化,基于新建上海经苏州至湖州铁路HSHZQ-1标段庄树下隧道296m长隧道改路基工程,通过对试验段边坡进行区域划分和对比爆破试验,分析稳定型钻孔措施对倾斜孔钻孔效果的影响、直立炮孔设计与倾斜炮孔设计的光爆效果对比以及炮孔参数与装药结构优化对光爆效果的影响。结果表明,稳定型钻孔措施对缓边坡的钻孔效果有明显的提升作用,符合设计角度(误差±2°)的炮孔占比由41.7%增加到91.7%;在一定范围内缩减辅助孔间距,有助于降低爆堆大块率;光爆孔间距的缩减、装药结构设计取消减弱段,均可以在一定程度上提高半孔率、边坡平整度,提升光面爆破效果。试验结果对缓边坡的光面爆破工程具有一定的参考价值。

In order to optimize the smooth blasting design of railway slow slope under complex environment, based on the subgrade engineering project of m long Zhuangshuxia tunnel in the newly built HSHZQ-1 section of Shanghai-Huzhou railway, through the regional division and comparative blasting test on the slope of the test section, the influence of stable drilling measures on the drilling effect of inclined hole, the comparison of the smooth blasting effect between the design of vertical blast hole and the design of inclined blast hole, and the influence of blast hole parameters and charge structure optimization on the smooth blasting effect are analyzed. The results show that the stability drilling measures have a significant effect on the drilling effect of the slow slope, the proportion of blastholes that meet the design angle ( error ± 2° ) increase from 41. 7 % to 91. 7 %. And, the spacing of auxiliary holes are reduced in a certain range, which is helpful to reduce the bulk rate of blasting pile. Furthermore, the reduction of smooth blasting hole spacing and the cancellation of weakening section in charge structure design can improve the half-hole rate, slope flatness and smooth blasting effect to a certain extent. The test results also have certain reference value for smooth blasting engineering of gentle slopes.

肖智峰,余朋.复杂环境下铁路缓边坡的光面爆破[J].煤矿爆破,2024,42(2):11-16.

XIAO Zhifeng, YU Peng. Smooth blasting of railway slow slope under complex environment[J]. Coal Mine Blasting,2024,42(2):11-16.