Application Of Control Blast In Existing At Electrization Railway Without Railroad Break-Off

With the quick development of the economy of our country, capacity passenger traffic is becoming more and more gravity. As railway transportation is the important way of the whole country, the contradiction between transportation demand and transportation capacity is becoming more and more standout. Being living, twin string lines of fresh is the nearest province of enlarging the railway transportation capacity.According to being living, twin string lines of fresh is beside the existing lines, it has high traffic flow and high cutting slope, blast and construction is difficult especially at electrization site because of catenary in the sky, railway on the ground and underground line pipe. So that study control technology to blast and construction without railroad break-off has important means.This paper performs the study with short steps blast, cracks cutting scheme blast based on project the double line from Zhuzhou to Liupanshui, geologic condition, terrain and environment. We drew some reliable conclusions and advices. And these conclusions can guide construction and satisfy the need of the safety of the traffic, construction schedule, economic benefits, and provided experience to similar engineering.