摘要
多夹层矿体作为一种复杂难采矿体,采用传统的采矿方法进行开采存在诸多突出问题,开展针对性的采矿方法研究对于实现此类矿体安全、高效、绿色开采具有重要意义。以“协同开采”和“无废开采”等采矿理念为指导,充分吸收“采空区协同利用”思想,以多夹层矿体安全、高效开采为目标,提出了多夹层矿体矿废分离协同采矿方法,并对两种典型倾角的多夹层矿体的具体实施思路进行了设计。从理论上建立了多夹层水平—缓倾斜矿体的最优协同厚度关系,推导了多夹层倾斜—急倾斜矿体未爆破夹层最优协同高度的计算公式,并引入矿废分离协同度定义,量化表征了新采矿方法的适用性。基于云南某铜矿多层缓倾斜矿体和贵州某磷矿急倾斜两层矿体的开采技术条件,对所提采矿方法进行了工程案例分析。研究表明:所提方法在一定的开采技术条件下与传统采矿方法相比,在降低废石运输成本、降低矿石损失贫化率、提高回采效率等方面具有显著优势;该方法的提出有助于解决多层复杂矿体的开采技术难题,具有一定的推广应用价值。
Multi-layer orebody as a kind of complex and difficult to mine orebody there are many outstanding problems in the traditional mining method.It is of great significance to carry out innovative mining method study to realize the safe,efficient and green mining of this kind of orebody.Based on the guidance of mining concepts such as"synergetic mining"and"non waste mining",this paper fully absorbs the idea of“synergistic utilization of goaf”,and takes the safe and efficient mining of multi-layer orebody as the goal,puts forward a new method of multi-layer orebody waste separation synergetic mining,and designs the specific implementation ideas of two typical inclined multi-layer orebodies.In theory,the optimal cooperative thickness relationship of multi-layer horizontal gently inclined orebody is established,the calculation formula of the optimal synergistic height of the unexploded interlayer of multi-layer inclined steeply inclined orebody is derived,and the definition of the synergistic degree of separation of ore and waste is introduced to quantify the applicability of the new mining method.Based on the mining technical conditions of a multi-layer gently inclined orebody of a copper mine in Yunnan Province and a two-layer orebody of a phosphate mine in Guizhou Province,the new mining method proposed in this paper is analyzed in engineering cases.The study results show that the new mining method has significant advantages in reducing the transportation cost of waste rock,reducing the loss and dilution rate of ore and improving the mining efficiency compared with the traditional mining method under certain mining technical conditions.The new mining method proposed in this paper could help for solving the mining technical problems of multi-layer complex orebodies,besides that,it also has certain promotion and application value.
作者
韦才寿
牛文静
潘桂海
Wei Caishou;Niu Wenjing;Pan Guihai(College of Civil and Architectural Engineering,Nanning College,Nanning 530200,China;Key Laboratory of Ministry of Education on Safe Mining of Deep Metal Mines,Northeastern University,Shenyang 110819,China;BGRIMM Technology Group,Beijing 100160,China)
出处
《金属矿山》
CAS
北大核心
2020年第5期41-49,共9页
Metal Mine
基金
2018年度广西高校中青年教师基础能力提升项目(编号:2018KY0745)
南宁学院2018校级科研团队项目(编号:2018KYTD07)。
关键词
协同开采
多夹层难采矿体
矿废分离
采矿方法
Synergetic mining
Multi-layer orebody
Separation of ore waste
Mining method
