Under certain geological conditions, mining height is the most fundamental factor in forming the destructive influence of the cover layer. The higher the mining height, the more severe the damage to the cover. And it also directly affects the am.......
First, the concept and role of formation grouting
Grouting includes three aspects: water control, ground reinforcement and foundation reinforcement.
Second, the engineering classification of the grouting method and the applicable conditions of various grouting methods
Recently, Changsha Wanzhong Bus Company has purchased 100 fast-filled pure electric buses. The first batch of 12 buses were put into operation at the Changsha Dongsheng Road bus station. These vehicles also marked the first batch.......
First, the basic knowledge
Divided into shallow hole step blasting and deep hole step blasting. Open-air shallow hole blasting refers to the step blasting operation where the diameter of the blasthole does not exceed 50 mm and the depth of the blasthole does not exceed 5 m. Bench bl.......
ST is the world's largest supplier of proximity sensors. Recently, it introduced the industry's smallest second-generation proximity sensor with dimensions of only 2.4x4.4x1mm, the farthest detection range of up to 2 meters and the accuracy of ± 3% Time can reach the m.......
The properties of ore and surrounding rock mainly include: hardness, firmness, solidity, swell, agglomeration, oxidation, pyrophoricity and water content.
(1) Hardness of ore rock
The hardness of the rock is the property of the rock to resist the intrusion of tools. The hard.......
2 Adjust the ion concentration of the collector
3 adjust the concentration of inhibitor
4 Adjust the dispersion and cohesion of the slime
5 Adjus.......
Nanshan Iron Mountain iron ore mining company recess is a large open pit mines, with the increase of mining depth, increasing slope stability problems have become increasingly prominent, mainly in the shallow steps by community surrounding rock seriously dam.......
With its pollution-free and renewable nature, wind power has been widely recognized by countries all over the world and has developed rapidly in recent years. The variable-speed constant-frequency wind power generation system with double-fed motor has significant advantages compared with .......
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