Tailings dam is a potential risk source in the metal mines, once the tailings dam break, it will not only lead to tremendous loss in people’s lives and property, but also result in serious environmental pollution. Basing on the accidents of tailings dam failure at home, the dam failure causes are analyzed, some technology and management suggestions about decreasing dam-break accident are put forward, which provide reference for safety management to tailings dam.
Based on the investigation and analysis of acid sewage quality component in some metal mine, and combining with the investigation on the engineering geology and the character of similar soil slope, the interaction and corrosion mechanism are studied between acid mine drainage and similar soil slope, it shows that the AMD changes the microstructure of rock-soil, displace and dissolve the integrant, magnify the structural scale, and hasten the new rift. The reinforcing treatments are proposed about using vetiver to consolidate the slope. The result from the practice shows that it has perfect mechanical effect using veriver to protect slope, and it is available to protect the similar soil slope, reduce the slope erosion-damage, and improve the slope stability.
Because the relationship is not considered between physical behavior and cross sections of bars, the conventional reinforced earth retaining wall design based on constant value would lead to some limitations: the haul-resistant coefficient of the top wall is not enough, but it goes beyond at the bottom of retaining wall. In the paper, considering the SARMA method, based on computing formula of traditional slope stability, the detailed programme is realized by the language of FORTRAN, it can make up deficiency that lies in the tradition reinforced earth retaining wall by considering the relationship of physical behavior and cross sections, lengths and layers of bars. Finally, the system program has been applied to a slope treatment project in Guangzhou. Compared with the design method of traditional regulations, it is demonstrated that the optimum length required is obtained, the cross section and length of bars are fully used, and the design is simplified.
Combined with the engineering geological conditions and geological characteristics of soil-like slope in a certain open-pit copper mine, based on the experiments and theoretical analysis, the instability mechanism of soil-like slope under the action of acid mine wastewater is researched. Because the acid wastewater goes into the weak structural plane, reacting with the constitutional materials and fillings in slopes, the react change the microstructure of the rock and soil, and replace, dissolve the components, causing the cohesion and internal friction angle of slope reducing eventually and slope failure.
In order to ensure the safety of the blasting excavation, it must monitor the vibration caused by blast with the information technology. Based on one tunnel, the monitoring method about the tunnel blasting vibration under the complex construction is systematically studied, combining with engineering practice, the correction mathematical formulas of the blasting seismic wave attenuation are given.
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