From December 10th to 12th, the China Academic Conference on Mine Geology Environmental Protection and Rehabilitation was held in Zunyi City, Guizhou Province. Meeting revealed that from 2000 to 2013, the central government allocated special funds of mine geological environment governance 26.997 billion yuan, the implementation of mine geological environment governance projects 1934, the central finance and investment to promote local businesses to invest in capital of 46 billion yuan.
According to reports, China's mine geological environment protection and governance work has made great achievements. As of 2009, after restoration and restoration, the country has restored a land area of ​​about 496,000 hectares, and managed 5,195 geological disasters in mines, and managed 3,37 ground cracks and ground collapses. The national mine geological environment control work has entered the stage of adjustment and improvement. The key points and directions of the project have been transferred from small projects with support and scattered funds in the past to support major projects.
At the same time, the experts pointed out that because some governance projects violated the laws of nature, the phenomenon of “one year green, two years of waste, three years of death†exists to varying degrees, and measures must be taken to avoid them. Some plants planted in the treatment project do not adapt to the local environment, and the recovery effect of the geological environment of the mine cannot be sustained.
Experts suggest that the mine should first grasp all the geological and meteorological data of the local and mountain areas, conduct regional forest facies surveys, and fully consider the species diversity of the substrate, and the community of plants and other factors to make the slope stable and overall green. Water and soil conservation, restore the original mountain appearance. The selected plants should emphasize the adaptation to the climate and soil characteristics of the region, with trees as the mainstay, grass, wood and flowers combined, both localized and diversified, and if necessary, a small number of exotic and innocuous species should be introduced to achieve maintenance-free and natural The recovery effect of growth.
The meeting was co-sponsored by China Geological Hazard Prevention Engineering Industry Association and Guizhou Provincial Department of Land and Resources. The 106 Geological Brigade of Guizhou Provincial Bureau of Geology and Minerals was organized to exchange ideas on how to effectively protect the geological environment of the mine and achieve coordinated development of resource development and geological environment protection. Promote the construction of "harmonious mining areas".
Motor assembly and parts consist of stator and rotor. Stator is made by squeezing rubber sleeve on the wall of the steel tube. There forms spiral structure with a certain geometric parameter. Rotor is a crome-plated screw rod.
The basic principle of downhole motor goes like this: stator and rotor matches with each other, to form spiral line and seal cavity through their guide rail difference. With rotor running in the stator, the seal cavity is moving along its axial direction, continuously forms and disappears to complete its energy conversion.
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