China alluvial sand placer gold in the account for a larger proportion of total reserves, which formed the current alluvial gold mining, the main way to ship mining, hydraulic mining, mining excavator, supplemented by the pattern.
First, the characteristics of placer gold mining in China over a broad area, and size. Second, because most of the northern non-frozen sand has been developed using gold, gold in the frozen sand increases in the proportion of exploitation. Placer gold ore in the south over farmland among the boulders and cement layer placer mining became an insurmountable obstacle. Besides flooding, the same ore body thickness and burial depth changes to the construction of larger ships brought negative, coupled with external construction difficult conditions, increasing growth rate of investment, mining become increasingly complex. China's gold mining ship from scratch, from small (50L) to large (300L), from Heilongjiang to the country, has made remarkable achievements.
According to China's production practices, to digest the introduction of foreign advanced technology, gold mining gold from the ship's election to the development of a single fixed chute chute movable tape, all out of the process. DC motors, power transmission can explore silicon devices, hydraulic, industrial TV applications in the gold mining ship, the ship gold to improve the level of equipment, piles - the first boat rope style gold mine successfully used to help open sand After the re-mining field.
To develop gold mining ship in the law, widely used open pit method, on the basis of conventional excavation, construction of ships in a gold mining site while the construction of two ships, the application of a common pit; a large quantity of ore in the ground water gushing body building on a main and used boat pit, pit-style dock; in shallow ore body on the all-pit; northern winter ice build construction vessels in gold punt; pier construction pit on the shore with the sliding punt Road, water and air bags into the water, convenient to reduce the amount of pit formation works and drainage.
In the adopted standard, the application of law to prevent the seasonal frozen soil Gallant, test seasonally frozen loose blasting treatment to obtain some experience in open mechanized placer mining field then stripped permafrost thawing Huma have successful experience in the booming gold Mine ripper dozer application process, especially the application of large bulldozer fleet operations, not only can solve the need to adopt the former solution of ice, but also can enhance the spin-off play to strengthen the role of mining.
In the mining process, the Handa big air gold mining slope of successful placer ore, gold mining in Sichuan Whitewater gold for large ships to cross the river and accumulated experience. The first rope pile joint gold mining increased ship production efficiency.
In environmental protection, Jilin Yanbian gold ship the first application of the sludge sedimentation tank for sewage purification, so far, this treatment process has been widely used in mountain mining ship. Fine sand and gravel in the next row on the way to the end, supported by bulldozers, the success of complex field experience.
In the gold mining ship construction has accumulated a wealth of practical experience in the equipment and materials under the conditions of complete construction of a gold boat, from 50L to 300L only 3 to 7 months.
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