ISBN: 9787564630751 - 厚煤层小煤矿破坏区煤炭资源充填复采回收技术 (1 Ergebnisse)

paperback. Zustand: New. Paperback. Pub Date: 2017-06-01 Pages: 166 Language: Chinese Publisher: China Mining University Press' small coal thick seams of coal resources in the destruction zone filled with complex mining recovery technology for a large number of legacy content is within the range of small coal mines Ida damage zone the reality of high-quality coal resources. the use of laboratory experiments. field exploration. numerical simulation. on-site .…