摘要
针对某铅锌矿急倾斜厚矿体赋存状态、开采技术条件和矿的稳固程度,开展了分段凿岩阶段空场法试验;采准工程布置优化为改进B型,可节省工程量约30%;切割拉槽采用间隔装药分次爆破技术,有效避免了爆破悬顶和立槽产生;爆破回采时扇形中深孔A区采用孔底高威力起爆和B区孔口交错装药措施,降低了炸药单耗和装药量;可为类似矿体开采提供经验借鉴。
Aiming at the occurrence state of the steeply inclined thick orebody,mining technical conditions and the stability of the mine in a lead-zinc mine,experimental research was carried out which about the open-stope mining method of sublevel rock drilling;the mining standard project layout was optimized to the improved type B,which could save about 30%of the engineering amount;the blasting technology of interval charging and staged blasting is adopted to cut the groove,which can effectively avoid the occurrence of blasting hanging roof and vertical groove;in the area of fan-shaped medium deep hole during blasting mining,it reduces the unit consumption and charge of explosives which is A-zone uses the hole bottom high-power detonation and the B-zone hole opening staggered charging measures;which can be used for reference in similar ore body mining.
作者
赵文奇
张亭
刘武团
何良军
ZHAO Wen-qi;ZHANG Ting;LIU Wu-tuan;HE Liang-jun(Northwest Institute of Mining and Metallurgy,Baiyin 730900,China;Efficient Deep Mining and Disaster Control Engineering Laboratory,Baiyin 730900,China;Deep Mining Company of Baiyin Nonferrous Metals Group Co.Ltd.,Baiyin 730900,China)
出处
《甘肃冶金》
2020年第5期6-10,共5页
Gansu Metallurgy
关键词
分段凿岩阶段空场法
改进B型布置
间隔装药分次爆破
炮孔密集程度
open-stope mining method of sublevel rock drilling
improved B-type layout
separate blasting of interval charge
blast hole density
