厦门石鼓山立交H匝道桥的加固与施工方案

厦门石鼓山立交近年来交通量剧增,桥梁超载情况比较严重。动静载试验发现H匝道桥主梁应变及挠度实测值偏大,且5号桥台一侧的板式橡胶支座出位偏移较严重。通过在桥梁跨中增加支撑,和对支座进行纠偏等桥梁加固措施,增大了梁体的线刚度,减少了跨中负弯矩。加固后对桥梁进行结构验算,结构是安全的。     

New mining technique with big panels and stopes in deep mine

For the purpose to suit the bad mining technical conditions, such as deep imbed, gentle dip angle, and high initial stress in Dongguashan deposit, the stoping scheme was optimized. The new mining technique, with temporary curtain walls, large panels and stopes, was achieved as well. The deposit model, which was built through the DATAMINE, was led into FLAC^3D for numerical simulation. Based on these, the stabilities of pillars and stopes were analyzed. On the other hand, the impact of output stability by new scheme was verified with the help of optimization planning theory. The results show that stopes and curtain walls are safe when the width of temporary curtain walls between panels are 18 m. The length and width of stope increase to 78 m （82 m） and 18 m respectively, and those of panel increase to 300-500 m and 100 m respectively. The commercial test indicates that the new scheme can attain the aims of simpler production organization, better stope ventilation and work condition, smaller quantities of development and cutting, and 2/3 of equipments as before with the stable output. The pillar stoping technique is credible and valuable.     

系统测试性指标确定方法

合理地提出系统测试性指标是测试性设计的首要步骤.针对系统研究初期缺乏详细信息和有效方法,采用了指标折衷系数法来解决该问题.该方法综合考虑使用方测试性需求和承制方能达到的测试性水平,充分考虑影响系统测试性的各项因素,应用层次分析法给出各影响因素的权重,采用折衷的办法确定系统的测试性指标,并举例说明算法的有效性.     

微生物浸出反应硫化铜矿石表面形态特征显微分析

通过光学显微镜和电子显微镜分析了硫化铜原矿样和经摇瓶浸出反应后的矿样表面形态变化特征.结果表明:两个矿样的铜的浸出率、TFe离子质量浓度均随着浸出逐渐上升,粒径较小的矿样浸出率较大.未经浸出反应的原矿样表面比较平整,微观尺度上的孔隙、孔洞很少;浸出反应后,矿石表面吸附有大量细菌,表面变得凹凸不平,大量目的金属元素被浸出.     

无底柱分段崩落法在谦比西铜矿的应用

根据赞比亚谦比西铜矿多年采矿经验,总结了无底柱分段崩落法开采中厚、倾斜矿体的设计要素、技术措施以及在实际生产管理中碰到的问题及解决办法,为其他类似矿山提供参考借鉴。     

金川二矿区16行垂直矿柱的开采风险分析与预测

叙述了金川二矿区16行垂直矿柱开采前的状况,介绍了16行垂直矿柱开采的依据及回采实践,从开采安全性、矿山地压活动、矿山整体稳定性3个方面对16行垂直矿柱开采的风险进行了分析与预测,相应提出了16行垂直矿柱安全回采的合理建议。