岩石巷道二阶二段掏槽爆破优化分析  

Optimization Analysis of Two-step Cutting Blasting on Rock Roadway

作　　者：张渊通 汤文达 郭盛华 康一强 王济祥 ZHANG Yuan-tong;TANG Wen-da;GUO Sheng-hua;KANG Yi-qiang;WANG Ji-xiang(School of Mechanics&Civil Engineering,China University of Mining&Technology(Beijing),Beijing 100083,China;Yangquan Coal Industry(Group)Co.,Ltd.,Yangquang 045000,China)

机构地区：[1]中国矿业大学(北京)力学与建筑工程学院,北京100083 [2]阳泉煤业(集团)股份有限公司一矿,阳泉045000

出　　处：《科学技术与工程》2020年第11期4273-4278,共6页Science Technology and Engineering

基　　金：国家重点研发计划(2016YFC0600903);高等学校学科创新引智计划“111计划”(B14006)。

摘　　要：为了解决因矸石过大而导致出矸时间过长,进而影响整个巷道掘进的问题,基于应力波叠加原理和二阶二段掏槽技术,提出通过采用多阶段一次爆破的方式,对现有的爆破和施工参数设计进行优化,然后从分形的角度对爆堆进行分析。经过现场试验和块度分析后发现:多阶段掏槽一次爆破可以有效地控制矸石粒级分布,平均块度直径减小了5 cm,矸石大块率明显降低,分形维数有所增加;大幅度缩减出矸时间和打眼装药时间,分别减少30、60 min;月循环进尺提高22.2%,有效地保障了硬岩巷道的掘进效率。At present, the gangue transport time is too long due to the large size, which influences the tunneling of the whole roadway. To solve this problem, a multi-stage one-time blasting method was proposed based on the principle of stress wave superposition and the two-step cutting technology. The blasting parameters were optimized and the blasting result was analyzed in fractal dimension. After field test and block analysis, it was found that the multi-stage one-time blasting could effectively control the distribution of block size, the average block diameter was reduced by 5 cm, the large block rate was obviously decreased, the fractal dimension was increased, the time of gangue transportation and drilling-charging was reduced by 30 and 60 min, respectively, and the monthly footage was increased by 22.2%, which ensured the tunneling efficiency of the hard rock roadway.

关 键 词：二阶二段 应力波叠加 掏槽技术 分形维数 

分 类 号：TD235[矿业工程—矿井建设]