尾矿坝沉降观测资料的分析方法

国内大多数尾矿坝都是采用上游法筑坝,上游法筑坝与下游法筑坝相比,筑坝工艺简单、经济,但其稳定性不如下游法。随着冶金工业的发展,我国尾矿坝技术也有了很大改进。但目前有不少矿山的尾矿坝都相继进入中晚期,尾矿坝逐年增高,其安全稳定性也变得越来越重要。特别是近几年来,少数矿山的尾矿坝发生了溃坝事故,如1985年东波铅锌矿尾矿库和山西塔儿山铁矿尾矿库溃坝,1986年黄梅山铁矿尾矿库溃坝等都带来严重危害和损失,因而这一问题已引起了各矿山的重视。为     

Coseismic slip distribution of 2009 L’Aquila earthquake derived from InSAR and GPS data

To better understand the mechanism of the Mw6.3 L’Aquila (Central Italy) earthquake occurred in 2009, global positioning system (GPS) and interferometric synthetic aperture radar (InSAR) data were used to derive the coseismic slip distribution of the earthquake fault. Firstly, based on the homogeneous elastic half-space model, the fault geometric parameters were solved by the genetic algorithm. The best fitting model shows that the fault is a 13.7 km×14.1 km rectangular fault, in 139.3° strike direction and 50.2° southwest-dipping. Secondly, fixing the optimal fault geometric parameters, the fault plane was extended and discretized into 16×16 patches, each with a size of 1 km×1 km, and the non-uniform slip distribution of the fault was inverted by the steepest descent method with an appropriate smoothing ratio based on the layered crustal structure model. The preferred solution shows that the fault is mainly a normal fault with slight right-lateral strike slip, the maximum slip of 1.01 m is located in the depth of 8.28 km, the average rake is −100.9°, and the total geodetic moment is about 3.34×1018 N·m (Mw 6.28). The results are much closer than previous studies in comparison with the seismological estimation. These demonstrate that the coseismic fault slip distribution of the L’Aquila earthquake inverted by the crustal model considering layered characters is reliable.     

多期复测网中公共稳定点的线性假设分析法

本文提出对多期复测网中公共稳定点进行检验的方法,并依据线性假设检验原理导出了检验公共稳定点的多点检验公式和单点检验公式,通过实例证明方法简便可靠。     

陀螺仪定向的可靠性分析

论文阐述了如何评定定向成果的可靠性及如何提高其可靠性,并有算例。     

急倾斜矿层开采地表移动计算的皮尔森函数法的改进

急倾斜煤层开采时,由于采空区上部岩一石冒落向下滚动填充下部采空区,加剧了岩石沿层面方向的移动。此外,底板也会发生移动。因此使得急倾斜矿层的岩层和地表的移动与缓倾斜或水平矿层的移动过程很不相似,目前对急倾斜矿层地表移动规律的研究还很不够。为了解决急倾斜煤层开采的各种地表移动变形预计问题,文献根据淮南     

金属矿山尾矿坝的溃坝事故及其他有关情况简介

尾矿坝的安全管理对矿山的正常生产和人民生命财产的安全都是至关重要的,应当引起足够的重视。文中列举了许多国内外重大的溃坝事故和溃坝所造成的损失,分析了溃坝原因,强调了尾矿坝的稳定性监测工作的重要性。通过国内外的实例说明,若能解决好坝体和坝基的渗流问题,尾矿坝高筑是完全可行的。