Fankou lead zinc ore body mainly occur in several major faults, fissures ore poor structural stability. After years of mining, the mining site of the ore body above the middle of the -320m area is decreasing, and there are more mines and corners. The roof of the stope is difficult to control, the s ...more...

[Chemical composition] Pure C. [Crystal structure] equiaxed crystal system, vertical aspect lattice; a 0 = 1.402 to 1.417 nm. The crystal structure is characterized by: 60 C is formed by a bond between the C-C bond in the diamond and the C-C bond in the graphite layer, and a total of 90 C-C bonds ...more...

I. Characteristics of ground pressure in the mining method of room and pillar When the level of the mining rock is stabilized and the ore body is gently inclined, the comprehensive method and the room and column method are generally used. The Hunan tin mine antimony ore with nearly a hundred years ...more...

Hubei vigorously - sprinkler self-priming pump common fault First, the motor part 1. No response after power on. Most of them are caused by short-circuiting of power plugs, power outlets, and motor windings. 2, difficult to start or can not start, and ac ...more...

The 2017 Green Car Tire Certification 2017 version has been officially released and implemented. This voluntary certification project has been officially renamed as “Car Green Tire Certification” from the “Car Green Tire Certification” and the English name is “China-Gr ...more...

Rebar bending machine is widely used in the bending forming of steel bars in bridges, highways, tunnels, power stations and other construction projects. It is one of the most important steel bar processing equipment. In the future, steel bending machines will continue to play an increasingly import ...more...

With the upgrading of Zoomlion series of products, the 4.0 series of concrete mixer trucks was launched in 2016. With a number of technological advantages, it became a new bright spot in the concrete machinery market. Zoomlion 4.0 mixer into a new highlight of the concrete machinery market Stable ...more...