地下矿山中深孔落矿爆破块度控制技术研究  

Study on blasting fragmentation control for moderate deep hole in underground mine

作　　者：赵艳伟[1] 何冬梅[1] 李祥龙[2] 刘俊轩[2] 

机构地区：[1]玉溪矿业有限公司大红山铜矿,云南玉溪653405 [2]昆明理工大学国土资源工程学院,昆明650093

出　　处：《中国工程科学》2014年第11期48-52,57,共6页Strategic Study of CAE

基　　金：国家自然科学基金项目(51304087);云南省基金项目(KKSY201404056;KKSA201121083)

摘　　要：扇形中深孔爆破的落矿方式在大红山铜矿中的应用占总采矿量的61%以上,但大块产出率较高严重制约着矿山供矿强度,平均大块率高达22.7%。为了降低大块率,实现矿山生产的高效发展,提出采用环形中深孔爆破落矿工艺并进行了现场试验,试验结果表明环形中深孔爆破落矿可使平均大块率降低至10.3%,与传统扇形中深孔落矿相比较,平均大块率降低了12.4%,使盘区当班日供矿量增加152.29 t,增长率为51.1%;减少了处理大块所耽误的时间和二次破碎的炸药与雷管的消耗,在提高出矿效率的同时,降低了落矿成本,取得了良好的爆破效果。The scallop medium-length hole blasting mining method used in Dahongshan Cop-per Mine accounted for more than 61 % of the total amount of mining,but the large boulder yield restricted the intensity of ore supply for mines,and the average boulder yield was as high as 22.7%. In order to develop the mine production efficiency,the circular medium-length hole blasting technology was proposed and field tests were carried out. The test results showed that circular medium-length hole blasting mining can reduce the average boulder yield to 10.3 %. Compared with the traditional scallop medium-length hole blasting mining,the average boulder yield was decreased by 12.4%. The daily yield of ore for the panel on duty was increased by 152.29 t,and the growth rate was 51.1%. The new technology can reduce the time for the han-dling of large pieces and the consumption of explosives and detonators for recrushing,and in-crease the efficiency of mining while reduce the mining cost,which has received good blasting effects.

关 键 词：扇形中深孔爆破 环形中深孔爆破 大块率 爆破效果 

分 类 号：TD235[矿业工程—矿井建设]