Sandaocha gold deposit was a reproduced deposit ,which occurred in J iapigou granite-green-stone belt based on the summarizing the geological and occurring characteristic of the ore deposit ,summarizing the way to choose the pre2prospecting target s ,and the in2prospecting working method ,and post2prospecting studing. It also pointed out the problem during the ore exploration.
Analyzed st rata st ructure and magma cont rolled metallogenesis, by summarizing up metamorphic rock series character of Seluohe
group and metallogenic character pointed out the prospecting direction in series of rock at the same time summarizing up mark of ore-finding.
Alteration mylonite gold deposit, which is steeply dipping and narrow vein together.With middling steady ore and rock is mined in Hetai gold mine, the shore2holl shrinkage is used as the main mining means for several years, also with mining technologies such as dry2filling stoping and small subsection middle2long2holl empty stoping. In recent years, technology of artifical pillar and sirnilar frarne work, st ructure supporting emptied stope make the mining technology more perfect. The progress of mining technique promote the mine production.
A process of leaching gold from a concent rate with Ca (OH)2 solution mixed with elemental sulfur under oxygen pressure was investigated. A series of experiments were devised and preformed to recognize the main effective factors. Further investigates show that the highest leached Au was achieved when the moore ratio of the elemental sulfur to the hydroxyl was ranged from 1.0 to 1.2 and the consumption of oxygen in the process from 0.38 to 0.55NL/gS0. Under these conditions the final pH was from 3.5 to 6. 0. 82 %～85 % Au was leached in one time leaching under optimized conditions, and 91% in two time leaching.
Gangue pipe, mainly used to transport the gangue slurry with concent ration about 30 % , is an important technical pipe for mine. The wall of pipe gets thinner and thinner and was broken into leakage as it has been becoming worn away by the sand of gangue for a long time, and it affects the production seriously. In this paper, we present an approach of the regenerating for gangue pipe by using polyethylene pipe. First, a polyethylene pipe with diameter of 130 mm and height of 6mm is inserted in the original gangue pipe, and then cement-grit slurry is injected into the space between the pipes, after slurry solidifying, the original gangue pipe is three2layer. The regenerating pipe is not only high-strength but also low-waterpower-friction-coefficient. The capacity of t ransport is improved and the cost is fell. The technology gives a novel idea for gangue pipe transport .
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