光面爆破技术在井筒基岩段施工中的应用

 摘 要：赵固二矿副井基岩段长度为137m，岩性主要为泥岩、砂质泥岩、砂岩。在副井基岩段采用了深孔光面爆破技术，通过理论计算及工程类比分析，综合考虑各方面的因素后，对不同围岩条件下的光面爆破参数分别进行了设计。井筒周边眼采用空气垫层装药结构，预留的空气垫层降低了爆轰波和爆生气体压力，减少了其对孔壁岩石的冲击压缩破坏，有效地控制了周边开挖轮廓，减少了对围岩的破坏，保证了井壁的质量。根据现场实际情况对设计的光面爆破方案加以灵活运用，并合理配置机械化设备，大大减轻了工人劳动强度，加快了掘进速度，取得了很好的效果。

Application of Smooth Blasting Technology to Base Rock Section Construction of Mine Shaft

Abstract: The bedrock section of the auxiliary vertical shaft in Zhaogu No.2 coal mine was 137m.Bedrock lithology was mainly mudstones, sandy mudstone, sandstone.We adopted deep hole smooth blasting technique during construction. After theoretical calculation and analysis, considering different factors, we designed respectively smooth blasting parameters of different surrounding rock.Shaft periphery used hole air cushion charge structure.Air cushion reduced the pressure of detonation wave and detonation gas, which decreased impact compression damage of hole wall rock.It effectively controled the peripheral excavation contour, reduced the damage of rock, guarantee the quality of the wall.According to the actual situation，we flexibly utilized the design of smooth blasting scheme.And reasonably equipped mechanical equipment. It greatly reduced the labor intensity, accelerated the excavating velocity, and acquired a very good effect.