The luxury SUV market has always been one of the most concentrated efforts among major manufacturers. The BBA has always occupied the top of the sales list, but does it pose a threat to the upgrading of the competitiveness of the second tier? The National Association of Sports Associat…
Last Saturday was the night of September 2, this year's most eye-catching car in a new car - Land Rover Range Rover Star announced the official guide price. At the launch conference, Jaguar Land Rover announced at the same…
Changsha is one of the first demonstration and promotion cities for energy-saving and new-energy vehicles in China. Since the first batch of pure electric bus trial operation in 2011, the number of new energy buses has exceeded 5…
A few days ago, the Federation of Travelers and Delegates found that according to statistics from manufacturers, in July, sales of new energy vehicles in China reached 40,700 vehicles, a year-on-year increase of 57.4%, which was basically the same as in June. In the first seven months …
1. Surrounding rock pressure
In order to prevent deformation and damage of surrounding rock, it is necessary to support the surrounding rock. The deformation force of the surrounding rock deformation and acting on the supporting structure or the gravity of the collapsed rock is coll…