深部厚矿体低贫损分段崩落法技术研究
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摘要
某矿7~#矿体及围岩均有次级构造裂隙分布,且上盘含有5～10m的断层泥,松软易冒,矿体的强度低容易冒落,不适合采用大跨度空场下作业的采矿方法。-350m中段及以上水平采用上向干式充填采矿法,但常伴随着的矿石损失大、安全条件差与生产能力低等技术风险。为最大限度地提高矿石回收率、降低贫化率,保证采场作业安全,以-350 m水平为界进行采矿方法过度,通过对采矿方法对比分析,-350m水平以下拟采用低贫损分段崩落法替代上向干式充填采矿法。通过分析分段高度、进路间距、崩落步距以及回收进路的选择对分段崩落法采场结构优化,确定采场参数为:分段高度6～7m,进路间距7～8m,崩矿步距1.1m,最大拉底高度为4.5m,工业性实验表明,在此参数下7#矿体能够实现低成本、低损失率、安全环境好和贫化率可控的高效率开采。
There are secondary structural fracture distribution in the 7~# ore body and wall rock of the mine.at the top of the section,it contains the 5-10 mfault gouge,it is soft and easy to take,the ore body strong is low and easy to caving,and don't adopt the way of large span under open stoping mining.At the-350 m and above the section,which adopt the dry filling mining way,but it is high loss of ore and poor safety condition and low production capacity.In order to improve the recovery rate of the ore,reduce the rate of dilution,be sure of the safety of the stope operation.So transition to the method that mining at the-350 m in terms of the contrast of the mining method and analysis.Under the-350 m,it should be the subsection caving method with low poverty and loss that it replace the dry filling mining method.Although analyzing the height of the section,distance between paths,caving step distance,as well as selection of recycling approach to optimize the sublevel caving stope structure,and to ensure stope parameters as follow:subsection height 6 m;path spacing 7-8 m,caving distance 1.1 m,maximum bottom height 4.5 m,the industry experiment show that the 7#ore body can be exploited with high efficiency,through low cost,low loss rate,good safety environment and controllable dilution rate.
There are secondary structural fracture distribution in the 7~# ore body and wall rock of the mine.at the top of the section,it contains the 5-10 mfault gouge,it is soft and easy to take,the ore body strong is low and easy to caving,and don't adopt the way of large span under open stoping mining.At the-350 m and above the section,which adopt the dry filling mining way,but it is high loss of ore and poor safety condition and low production capacity.In order to improve the recovery rate of the ore,reduce the rate of dilution,be sure of the safety of the stope operation.So transition to the method that mining at the-350 m in terms of the contrast of the mining method and analysis.Under the-350 m,it should be the subsection caving method with low poverty and loss that it replace the dry filling mining method.Although analyzing the height of the section,distance between paths,caving step distance,as well as selection of recycling approach to optimize the sublevel caving stope structure,and to ensure stope parameters as follow:subsection height 6 m;path spacing 7-8 m,caving distance 1.1 m,maximum bottom height 4.5 m,the industry experiment show that the 7#ore body can be exploited with high efficiency,through low cost,low loss rate,good safety environment and controllable dilution rate.
引文
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[4]何荣兴,任凤玉,宋德林,等.大结构参数无底柱分段崩落法的发展及技术问题探讨[J].金属矿山,2015(6):1-5.HE Rongxing,REN Fengyu,SONG Delin,et al.Discussion on development and technical problems of sublevel caving with large structural parameters[J].Metal Mine,2015(6):1-5.
[5]李小双,李耀基,王孟来,等.缓倾斜中厚磷矿床矿柱稳定性及采场结构优化[J].金属矿山,2015(5):44-47.LI Xiaoshuang,LI Yaoji,WANG Menglai,et al.Stability of the pillar and stope structure of optimization of gently inclined and medium thick phosphate rock[J].Metal Mine,2015(5):44-47.
[6]陈超,任风玉,杨丽.北洺河铁矿无底柱高效采矿方法研究与实践[C]∥全国金属矿山采矿新技术学术研讨与技术交流会.2007.
[7]孙文勇,陈星明,王伟,等.缓倾斜中厚矿体无底柱分段崩落法下盘残留矿石合理回采工艺研究[J].金属矿山,2014(2):12-17.SUN Wenyong,CHEN Xingming,WANG Wei,et al.Reasonable mining technology of football residual ores in pillarless sublevel caving of gently inclined medium thickness ore-body[J].Metal Mine,2014(2):12-17.
[8]周宗红.夏甸金矿倾斜中厚矿体低贫损分段崩落法研究[D].沈阳:东北大学,2006.
[9]林业成.云南某铜矿房柱法采场结构参数优化研究[D].昆明:昆明理工大学,2017.