硬岩斜巷掘进中深孔光爆参数优化研究  

Study on smooth blasting parameter optimization of medium-length hole in hard rock inclined roadway drivage

作　　者：孟小瑞[1] 

机构地区：[1]河南省水利水电学校,河南省周口市466001

出　　处：《中国煤炭》2016年第11期65-68,共4页China Coal

摘　　要：为提高硬岩斜巷成型质量和施工效率,以桃园煤矿人行上山爆破施工为背景,分析了造成炮眼利用率较低、巷道超欠挖严重及施工效率较低的原因,结合理论计算和工程前期施工经验对各爆破参数进行优化。结果表明:优化后的爆破方案采用全断面一次起爆,掏槽选用三级楔形掏槽,周边眼炮眼密集系数取0.89,底板眼呈双排梅花型布置,可使炮眼利用率提高到90.5%,巷道成型质量显著提高,每爆破循环节约用时1 h。To improve the forming quality and construction efficiency of hard rock inclined roadway, taking the blasting construction of walkway rise in Taoyuan Coal Mine as the back- ground, the reasons for low use ratio of blast hole, serious back break of roadway and low con- struction efficiency were analyzed, and the blasting parameters was optimized by combining with theoretical calculation and previous construction experience. The results showed that the opti- mized blasting scheme with full section one-time blasting method, three-level wedge cut, inten- sive coefficient of periphery hole adopting 0.89 and double-row quincunx type distributed floor hole could increase the use ratio of blast hole to 90.5 %. The roadway forming quality improved significantly and the time of each blasting cycle decreased to 1 h.

关 键 词：硬岩 斜巷掘进 光面爆破 中深孔 爆破参数 楔形掏槽 

分 类 号：TD235.3[矿业工程—矿井建设]