Deep Coal Mining

随着开采向富含甲烷和其他碳氢化合物的煤层深入，越来越多的瓦斯涌出、煤隆起和煤柱灾难性坍塌的可能性变得越来越重要。本研究将通过研究应力水平、应变速率、气体解吸速率、排干和不排干气体和液体压力在煤的动态破坏中的作用来解决这一问题，同时评估各种危险指数和前兆信号的前景和保真度。

The occurrence of progressively larger gas outbursts, coal bumps, and the potential for the catastrophic collapse of coal pillars is of increasing importance as mining drives deeper in seams rich in methane and other hydrocarbons. This study will address this issue by examining the roles of stress level, strain-rate, gas desorption rate, and drained and undrained gas and liquid pressures in the dynamic failure of coal, while simultaneously evaluating the promise and fidelity of a variety of hazard indices and precursive signals.