摘要
磊磊石矿开采过程中需要对突起柱状矿体进行单独拆除爆破,为确定合理的爆破拆除方案和装药方式,降低其大块率,提高其松散系数,利用ANSYS/LS-DYNA有限元软件计算分析3种装药方式(同面直线布孔、对面交替布孔和四面螺旋上升布孔)的爆破损伤。通过比较矿柱各水平截面及不同时刻的爆破损伤值,发现炮孔以螺旋上升的方式布置时,各部位爆破损伤值和整体损伤值达到最大,爆破效果最佳。对该方案进一步进行优化,炮孔最小抵抗线为28 cm时,大块率明显降低,松散系数为1.48,实际爆破效果良好。
In the mining process of Leilei Mine,it is necessary to demolish the protruding columnar orebody by blasting. In order to determine the reasonable blasting demolition scheme and charging mode, so as to reduce the big block coefficient and improve the loose coefficient, the blasting damage of three charging modes was simulated and analyzed with ANSYS/LS-DYNA, and the blasting damage values of each horizontal section of the pillar were calculated. The results were obtained by quantitative comparison. When the holes are arranged spirally, the blasting damage value of each part and the whole damage value reach the maximum, blasting effect is the best. The scheme is further optimized, and the result is that the minimum burden is 28 cm. The actual blasting results show that after adopting the optimized scheme, the big block rate is obviously reduced, the loose coefficient is 1.48.
作者
李梅
王禹函
吴矾
谭海
王其洲
LI Mei;WANG Yu-han;WU Fan;TAN Hai;WANG Qi-zhou(Wuhan University of Technology, Wuhan 430070,China;Sinoma Construction Yanzhou Co LTD,Jining 272100,China)
出处
《爆破》
CSCD
北大核心
2019年第2期54-58,98,共6页
Blasting
基金
国家自然科学基金(51104111、51704218)
关键词
柱状结构
爆破损伤
最小抵抗线
大块率
松散系数
columnar structure
blasting damage
cinimum resist line
big block coefficient
loose coefficient
