The Giant Mine, located in Yellowknife, Northwest Territories, Canada has been operating as a gold mine since 1948. Giant has been primarily an underground operation which used roaster technology to remove of gold from refractory arsenopyrite ore. The roasting process produced arsenic trioxide bearing dust as a waste product. This dust was pneumatically conveyed into underground storage chamber...

In this paper, the seismic reduction and isolation measures are first proposed by setting a segmented layer between diaphragm wall side of station structure. Although can effectively improve stress state slabs, effect middle column is not obvious. order to overall performance structure, combining new type bearing then proposed. At same time inserting sliding at top set up reduce vibration. The ...

extended abstract introduction water resources management in arid and semi-arid areas is very important to provide of water for stakeholders. in recent decades, construction of underground dams have been considered, because of its advantages. these dams have many advantages, e.g., unlike a surface dam, land is not submerged to store water and there is no danger of breaching due to natural or ma...

Modern mining is the process of exploiting minerals from the earth to derive profits. Realtime optimization for plant-wide production has been implemented in the process industry; however, these systems have not yet been implemented for mine-wide production in the mining industry, particularly for underground mines. Real-time control systems have been applied to a few unit operations (e.g. conv...

Rhythmic springs (ebb and flow springs, intermittent springs, potajnice) belong to the group of springs which appear exclusively in karstified terrains. The paper describes various types of rhythmic springs and gives their classification. It also develops a mathematical model for the functioning of this type of springs based on the principle of recharge and emptying of the underground reservoir...

Underground structures can be severely damaged during strong earthquakes. Potential damage to infrastructure due uplift increases in liquefied soils. Several models used simulate soil liquefaction. This study presents a new numerical method estimate the overall response of shallow-buried tunnels and interpret liquefaction mechanism saturated sand around structure under seismic action. The stems...

In this paper, a new approach for the dynamic reliability assessment of finite element modelled underground pipeline structures under earthquake excitations with uncertain parameters is proposed. The approach is established based on the thoughts of the newly developed probability density evolution method, which is capable of capturing the instantaneous probability density function (PDF) and its...

We developed a simple monetary model to study the effects of tax evasion on the optimal inflation tax. The model is constructed so that inflation might be an indirect way of taxing the underground sector of the economy. We show that while there are theoretical reasons for positive optimal inflation rates, the effects are quantitatively small, even in countries with large underground sectors. We...