Zhou, Fu-bao; Wang, Xin-xin; Liu, Ying-ke - In: Natural Hazards 74 (2014) 2, pp. 989-1005
Gas drainage not only ensures safety in coal mine but also produces clean energy and reduces emission of greenhouse gases. However, a good method to evaluate the efficiency of gas drainage is still absent. In this study, we firstly propose a definition of gas drainage efficiency which is defined...