Environmentally Safe and Effective Processes for Paint Removal Paint stripping and repainting of aircraft surfaces arc requircd periodically during thc operating lifetime of an aircraft. Historically, paint removal has been achieved using chemical strippers, involving materials which contain toxic components and which create hazardous working conditions. The process generates large amounts of h...

The influence of blasting energy on fragmentation and damage reserved rock is important for safety schedule drill-blasting construction in coal mine. This study aimed at investigating the dynamic mechanical properties mudstone mine using characterization method, their quantitative relation formula was also developed. impact compression experiments Huainan mining area were conducted to saturated...

With changes in mining depth, the dynamic mechanical characteristics of same type rock also change, so that blasting excavation process must be constantly adjusted and optimized to meet requirements safe efficient mining. To study energy evolution law fractal deep marble during destruction process, impact tests under different strain rates were carried out on a sample using three-axis combinati...

Liquid carbon dioxide blasting technology has a wide range of applications and is characterized by sound fracturing effects, low vibration hazards, high safety. In order to investigate the characteristics mechanism CO2 phase change rock breaking, liquid tests on rock-like specimens were carried out in this paper. The results show that 130 MPa threshold value at which system moves from dynamic t...

Step blasting is an important part of open-pit mining, which accompanied by hazards such as large blocks, flying stone splashing, noises, and dust during the process. In order to reduce harm caused blasting, this paper uses impact dynamics rock explain deformation damage motion law detonation material blocked gun hole. By simulating in hole, failure characteristics hole are revealed. paper, geo...

The rock fragmentation distribution resulting from blasting is one of the important factors method design model for dismantling excavated materials. Calculation using R.L. Ash, C.J. Konya, and ICI-Explosive theories. determining size analysis in activities uses Kuz-Ram Split Desktop 4.0 software. A good geometry a technical economical point view enables achieving target production according to ...

Dry-ice particle blasting is similar to sand blasting, plastic bead blasting, or soda blasting where a media is accelerated in a pressurized air stream (or other inert gas) to impact the surface to be cleaned or prepared. With dry-ice blasting, the media that impacts the surface is solid carbon dioxide (CO2) particles. One unique aspect of using dry-ice particles as a blast media is that the pa...

The object of research: the process development main cracks in massif rocks under action a wave impulse taking into account dynamic destruction resistance.
 Investigated problem: Description dynamics crack mode increasing their size, as well transition to an unstable growth.
 scientific results: In present article uses approach based on principle least and N-characteristic growth resi...

Abundant steeply-dipping thick coal seams (SDTCS) have been found in Xinjiang, China, and they are mined largely by the horizontal section top-coal caving (HSTCC) method. The hanging wall of the HSTCC face is nearly vertical and does not fracture easily after the underlying coal is extracted. As a result, stress tends to concentrate in the hanging wall of the lower-section working face (LSWF) a...