The Raspadskaya mine in Russia’s Siberia, where at least 52 people died in the double accidental blasts at the weekend, was one of the world’s most technically advanced coal mines. However, even the most advanced safety system can not provide 100 percent protection against methane gas explosions in mines, a leading Russian expert said on Tuesday. Follow the link to the story at http://english.peopledaily.com.cn/90001/90777/90853/6981538.html