矿业工程研究
礦業工程研究
광업공정연구
MINERAL ENGINEEERING RESEACH
2012年
3期
1-5
,共5页
龙专%林大能%刘医硕%钱立坤
龍專%林大能%劉醫碩%錢立坤
룡전%림대능%류의석%전립곤
大空孔%直眼掏槽%硬岩巷道%间距%集中效应
大空孔%直眼掏槽%硬巖巷道%間距%集中效應
대공공%직안도조%경암항도%간거%집중효응
big empty hole%parallel cut%roadways located in hard rock%distance%concentration effect
针对目前普遍存在小断面硬岩巷道爆破效果差的问题，介绍了大空孔角柱式直眼掏槽爆破方式．理论分析表明，空孔可提供自由面和为破碎岩石提供补偿空间的作用，空孔直径越大爆破效果越好．结合岩石性质和断面大小给出了掏槽装药孔与空孔之间的合理1＂4距、掏槽药量．现场试验表明，大空孔角柱式直眼掏槽方式，炮眼利用率高达94％，炸药消耗量低，证明此掏槽方式适用于小断面硬岩巷道掘进爆破．
針對目前普遍存在小斷麵硬巖巷道爆破效果差的問題，介紹瞭大空孔角柱式直眼掏槽爆破方式．理論分析錶明，空孔可提供自由麵和為破碎巖石提供補償空間的作用，空孔直徑越大爆破效果越好．結閤巖石性質和斷麵大小給齣瞭掏槽裝藥孔與空孔之間的閤理1＂4距、掏槽藥量．現場試驗錶明，大空孔角柱式直眼掏槽方式，砲眼利用率高達94％，炸藥消耗量低，證明此掏槽方式適用于小斷麵硬巖巷道掘進爆破．
침대목전보편존재소단면경암항도폭파효과차적문제，개소료대공공각주식직안도조폭파방식．이론분석표명，공공가제공자유면화위파쇄암석제공보상공간적작용，공공직경월대폭파효과월호．결합암석성질화단면대소급출료도조장약공여공공지간적합리1＂4거、도조약량．현장시험표명，대공공각주식직안도조방식，포안이용솔고체94％，작약소모량저，증명차도조방식괄용우소단면경암항도굴진폭파．
The excavation method of parallel cuts by applying angle - column shaped and big empty holes is proposed to increase the blasting effect. It is concluded from the experiments that the free faces and compensation space are provided by the empty holes, and the greater the diameter of the holes is, the more the efficiency is increased. Combined with the rock properties, the proper distance between cuts and empty holes and the charge weight are proposed. Field tests show that the utilization ratio of blast holes are reaching highly to 94% , the consumption of explosives is lower. It can be shown from above results that the method can be applied to the tunneling in small section roadways located in hard rock.
