Three-dimensional modeling of a deposit in a database

Institute of Mining, Siberian Branch, Academy of Sciences of the USSR, Novosibirsk. Translated from Fiziko-Tekhnicheskie Problemy Razrabotki Poleznykh Iskopaemykh, No. 4, pp. 77–85, July–August, 1991.     

某厂房吊车梁结构性能检测

对某厂房预制钢筋混凝土吊车梁进行了正常使用极限状态的性能检测，并详细介绍了试验的实现方法以及对有关检测规范的具体运用。     

某厂房吊车梁结构性能检测

对某厂房预制钢筋混凝土吊车梁进行了正常使用极限状态的性能检测,并详细介绍了试验的实现方法以及对有关检测规范的具体运用。     

Parameters of rigid-wedge introduction in a sample with a cut

Institute of Mining, Siberian Branch, Academy of Sciences of the USSR, Novosibirsk. Translated from Fiziko-Tekhnicheskie Problemy Razrabotki Poleznykh Iskopaemykh, No. 1, pp. 109–113, January–February, 1989.     

某银多金属矿采空区综合治理方法

内蒙古某银多金属矿为缓倾斜矿脉,采用浅孔房柱法采矿。经过多年开采,井下形成大面积采空区,空区内遗留部分点柱矿量。为消除空区隐患,矿山进行了采空区综合治理研究。利用FLAC^3D软件,对不同的治理方案和施工顺序进行数值计算模拟,分析治理过程中采空区围岩应力和位移变化,最终确定安全高效的治理方案。根据数值模拟结果,选择隔一充一间隔充填法在空区充填的过程中回收点柱方案,能够在空区治理的过程中有效控制围岩变形、控制地表塌陷、保障施工安全,为类似矿山大型采空区治理提供了参考依据。     

Interfering ions in the flotation of a phosphate ore in a batch column

The “Barreiro” carbonatite complex is located in Araxá, MG, Brazil. The production of apatite concentrate from this ore started in 1978 and the current production capacity is 800,000 tonnes.The ore is subjected to the following unit operations in the concentrator: grinding, classification, low field magnetic separation, desliming, apatite and barite flotation, high field magnetic separation, filtration and drying.Barite and apatite flotations were performed in 300 ft³ (8.5 m³) Wemco mechanical cells until 1992. The replacement of the mechanical cells by flotation columns occurred in two stages: fine fraction flotation circuit in 1993 and coarse fraction flotation circuit in 1994. All the 66 mechanical cells were replaced by 6 flotation columns (3.0 m × 4.5 m × 14.5m), resulting in improved selectivity and recovery and significant reductions in the consumption of the collectors for barite and, mainly, for apatite.The flotation process control monitoring in laboratory bench scale mechanical cells was then inadequate due to the discrepancy with the industrial practice. A specific methodology was developed for batch column flotation testing. The technique was checked by means of comparison with the industrial plant practice of apatite and barite flotation, showing its reproducibility and reliability for process development testwork.The batch flotation column was utilised to evaluate the effect of ions (dosed in the conditioning stage) on the flotation of barite and apatite. Flotation tolerance limits were established for the ions calcium, magnesium, phosphate, fluoride and rice bran oil soaps. Due to the fact that these ions were dosed as sodium salts (in the case of anions) or as chlorides (in the case of cations), the effect of sodium and chloride ions was also assessed (tests with the addition of sodium chloride).The results led to the environmental benefit of a full process of water recirculation in the concentrator without impairing the flotation performance.     

新型抑制剂在栾川某低品位白钨矿浮选中的应用

为解决钨捕收剂生产过程中产生高COD废水的问题,研制了新型环保钨捕收剂,并在湖南某选厂进行了工业实验。工业实验获得钨精矿含WO₃ 40.10%,WO₃实际回收率为71.73%,WO₃回收率比2016年、2017年的钨全年累计生产指标平均提高3.41%;工业实验尾水COD 28.39 mg/L,比2016年、2017年GY作捕收剂的平均COD下降14.53%。工业实验结果表明,新药剂分选性能优异,生产过程稳定,绿色环保,在保障原有钨精矿品位和回收率的情况下,工业实验综合药剂成本和尾矿废水COD有所降低,新型环保捕收剂的使用,经济效益明显,对矿山企业具有节能减排、清洁环保的重要意义。     

State of stress in a bench undercut by a slot in its base

Journal of Mining Science -     

新型抑制剂在栾川某低品位白钨矿浮选中的应用

栾川某低品位白钨矿由于粗选效率低,导致加温精选成本高,钨精矿质量差.试验研究了新型抑制剂CC和水玻璃及其改性化合物的选择性抑制效果,并且增加精选作业来提高白钨矿粗选品位.结果表明,新型抑制剂CC的抑制效果好,且用量小,通过一次粗选、一次精选和一次扫选的闭路试验可得到品位3.12%、回收率82.87%的白钨粗精矿.工业试验结果表明,通过使用新型抑制剂CC并增加精选作业,白钨矿粗选品位从1.03%提高到1.96%,回收率基本保持不变.     

越南某磷矿工艺矿物学研究

利用偏光显微镜、能谱仪、扫描电镜、XRF及MLA系统等对越南某磷矿进行了工艺矿物学研究.结果表明,该磷矿中P2O5含量为21.85％,为低品位磷矿,有害元素主要为SiO2,含量为34.73％,工业类型为硅质及硅酸盐型磷块岩;P2Os主要赋存在碳氟磷灰石中,少量赋存在银星石中;矿样中碳氟磷灰石主要为碎屑状、自形短柱状、微...     

Assessment of Phosphate Limestone Wastes as a Component of a Store-and-Release Cover in a Semiarid Climate

In a semiarid climate where the annual precipitation is low and the evaporation rate is high, contaminated drainage production from mine tailings can be controlled by reducing water infiltration. Store-and-release covers that use capillary barrier effects can prevent water percolation by storage and evaporation (or evapotranspiration) during wet and dry climatic periods. In Morocco, sedimentary phosphate mines are located close to contaminated sites, which includes the abandoned Kettara mine. This mine site generates highly contaminated acid rock drainage (ARD) with negative impacts on its surrounding area. In order to validate if phosphate mine wastes can be used as cover material to reclaim the Kettara site, instrumented test columns were exposed to field conditions and tested for a period of one and a half years. Under natural conditions, more than 94 % of the total net infiltration (246.5 mm) was released to the atmosphere by evaporation. Preliminary tests showed that the studied scenarios can limit deep water infiltration even during extreme simulated rainfall (155 mm/d) and could be used to efficiently control contaminated drainage in a semiarid climate.