摘要
弓长岭铁矿深部富矿较为破碎,回采巷道采用高强度钢筋混凝土支护后塌冒严重,大量富矿石无法采出。针对富矿破碎、节理裂隙发育的特点,提出了分段诱导冒落回采方案,中段高度60m,首采分段为-310m水平。基于试验得出的矿岩力学参数,对-310m水平富矿的可冒性进行了计算分析,设计的试验采场回采方案能较好地解决深部富矿的回采问题。
Gongchangling Iron Mine has the deep fractured high-grade orebody. Although harder reinforced concrete was used to support mining roadways, the wall rock of mining road- ways was seriously broken. It resulted in inability to extract the massive high-grade ores. Based on the investigation and analysis of the broken mining roadways, the failure of mining roadways is mainly caused by the jointing crevasse growth of high-grade ore body. The rigid support currently used is not suitable for the character of high-grade orebody and the sublevel induced caving stoping scheme is put forward and the first stoping level is in The mining level height is 60m 310m level. Based on the rock mechanics parameters by the experiment, the structural character of easy-caving is analyzed and the stoping scheme of sublevel in- duced caving is proposed. It is expected that this scheme can ef- fectively solve the stoping problem in Gongchangling Iron Mine.
出处
《化工矿物与加工》
北大核心
2017年第5期44-47,共4页
Industrial Minerals & Processing
基金
国家重点研发计划项目(2016YFC0801600)
关键词
富矿体
巷道塌冒
诱导冒落
可冒性
临界冒落跨度
high-grade orebody
roadway collapse
induced ca- ving
inbreak character
critical caving span
