Shotcrete is a kind of concrete which is formed by means of a jetting machine, which uses compressed air to mix a certain proportion of the mixture, which is conveyed by pipeline and is sprayed at high speed onto the rock surface or other surface to be hardened by the spray surface. Shotcrete can c
Before the excavation of the rock mass, it is in equilibrium under the action of the original stress field. After the excavation, the load carried by the excavation part of the rock mass is transferred to the surrounding rock mass to generate stress concentration, and finally a new stress field is f
Suzhou Huihang Drive Co., Ltd. is located in Suzhou Industrial Park. It is mainly engaged in the research and development of drive systems, motors, electronic control systems, planetary gearboxes, etc. It is one of the professional companies engaged in the promotion of energy-saving products and en
Mine explosives are mixed with explosives according to their composition. The ideal mineral explosives should meet the following requirements. ( 1 ) Explosive performance is good, with sufficient explosive power, it is best to simply change the formula to adjust its power. ( 2 ) The safety perform
The role of the valve is to isolate the equipment and piping systems, regulating the flow, to prevent back pressure, regulation and discharge pressure is the control element of the fluid pipeline system, the role is no different, so in the course of the usual need to pay attention to valve mainten
The impact rock pressure is classified according to its apparent strength, released energy, and the like. According to the intensity of the impact, it can be divided into four categories: (1) Ejection. Some individual fragments are shot from ore bodies or rock masses under high-pressure stress con
Plug tester 1. First replace the appropriate test fixture. 2. Connect the trachea regulator pressure regulator, pressure adjustment in the 0.2-0.4MPA, not too large or too small; plug in the power cord, confirm the voltage at 220V. 3. Zero pole and outer high-voltage knob (voltage reset to safety)
There are a variety of current cars, and the principles of engines and gearboxes are varied. However, many technologies are based on the old technology of several decades ago. Car manufacturers now have very little improvement on engines and gearboxes, and the powertrain is not incapable of this a
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 collectively referr
As the leader in the global luxury car market, Daimler Group and Beiqi New Energy, which is the first camp of China's pure electric market, have been receiving attention after they both received shares. In June, Beijing Automotive Group Co., Ltd. signed a framework agreement with German partn
Replacing gold wire with zinc recovered from the gold-containing solution more expensive, is zinc wire in substitution box. Its technical operation is as follows: 1. Zinc wire addition   The zinc wire should be loosely and evenly laid on the screen inside the box, and the through hole cann
The questionnaire is to use statistical tables to organize data and analyze product quality. Various phenomena and causes of the problem, find out the degree of influence of various causes, Provide a basis for quality issues. Air Jet LoomAir Jet Loom,Automatic Air Jet Loom,Used Glass Fiber Loom,M