尾矿堆积坝透镜体分布状态研究
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摘要
尾矿堆积坝中尾砂透镜体具有复杂的分布状态,对坝体的稳定状况有极大影响。根据工程地质勘察所揭露出的透镜体长度信息,定义了一个分布系数来描述透镜体分布状态,并对德兴铜矿2#尾矿坝、永平铜矿1#尾矿坝、安徽某铜矿尾矿坝及银山铅锌矿尾矿坝主剖面进行了分析。结果表明,分布系数能较好地反映出尾矿堆积坝的沉积状况,即分布系数值越大,尾矿坝的沉积状况越好:分布系数与尾矿土的不均匀系数成正相关,与粉砂不均匀系数有定量的关系。这些结果对尾矿坝工程地质勘察资料的分析及尾砂沉积规律的认识可能会有重要意义。
Tailings lenticle with complicate distributing state in tailings fill dam has great influence on the stability of the dam. According to the length of tailings lenticle obtained by engineering geologic examination, a distributing coefficient is put forward to describe distributing state of tailings lenticle; and the survey data of four tailings fill dams are analyzed. The result shows that the sediment state of tailings fill dam can be reflected by the distributing coefficient of tailings lenticle that bigger value means better state. Distributing coefficient is in direct proportion to the nonuniformity coefficient of tailings and the quantitative relation between distributing coefficient of tailings lenticle and the nonuniformity coefficient. These results might have significant meaning to the analysis of the data of engineering geologic examination and understanding sediment rule of tailings.
Tailings lenticle with complicate distributing state in tailings fill dam has great influence on the stability of the dam. According to the length of tailings lenticle obtained by engineering geologic examination, a distributing coefficient is put forward to describe distributing state of tailings lenticle; and the survey data of four tailings fill dams are analyzed. The result shows that the sediment state of tailings fill dam can be reflected by the distributing coefficient of tailings lenticle that bigger value means better state. Distributing coefficient is in direct proportion to the nonuniformity coefficient of tailings and the quantitative relation between distributing coefficient of tailings lenticle and the nonuniformity coefficient. These results might have significant meaning to the analysis of the data of engineering geologic examination and understanding sediment rule of tailings.
引文
[1] 陈守义.浅议上游法细粒尾矿堆坝问题[J].岩土力学,1995,16(3) :70-76．
[2] 李作章,徐日升,穆鲁生等.尾矿库安全技术[M].北京:航空工业出版社.1996．
[3] 袁晓铭,孙锐.饱和砂土透镜体液化对建筑物地震反应的影响[J].地震工程与工程振动,2000,20(1) :69-74．
[4] Consoli N C. Comparison of the measured and predicted performance of tailings sedimentation[J]. Proceedings of the Institution of Civil Engineers Geotechnical Engineering, 1997, 125(3) : 179-187．
[5] Skoglund T W. Hydrologic and sedimentation characteristics of closed system tailing Basins[J]. Water Science and Technology, 1980, (2) : 1 147-1 154．
[6] 陈立,谈广鸣.影响含沙水流极限浓度的因素[J].水利学报,1995,(10) :69-73．
[2] 李作章,徐日升,穆鲁生等.尾矿库安全技术[M].北京:航空工业出版社.1996．
[3] 袁晓铭,孙锐.饱和砂土透镜体液化对建筑物地震反应的影响[J].地震工程与工程振动,2000,20(1) :69-74．
[4] Consoli N C. Comparison of the measured and predicted performance of tailings sedimentation[J]. Proceedings of the Institution of Civil Engineers Geotechnical Engineering, 1997, 125(3) : 179-187．
[5] Skoglund T W. Hydrologic and sedimentation characteristics of closed system tailing Basins[J]. Water Science and Technology, 1980, (2) : 1 147-1 154．
[6] 陈立,谈广鸣.影响含沙水流极限浓度的因素[J].水利学报,1995,(10) :69-73．
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