长壁采矿法是目前缓倾斜薄矿体最常用的采矿方法。但是,要应用好这种采矿方法,首先要掌握好首次老顶来压与周期来压的时间、压力关系。目前长壁采矿法的理论还是用悬臂梁理论。但该理论与实际工作情况仍有一定差距,为了探讨这个问题,我们将在实践中应用的体会小结如下,供大家讨论。 (一)首次老顶来压大小的计算根据悬臂梁的理论,采场首次老顶来压时 The longwall mining method is the most commonly used method of mining for gently dipping thin ore bodies. However, to apply such a mining method, we must first grasp the time and pressure between the first old pressure and the cyclical pressure. The current theory of longwall mining method is still using cantilever theory. However, there is still a certain gap between this theory and actual work. In order to explore this issue, we will summarize the experiences we have encountered in practice as follows for discussion. (A) the first calculation of the size of the old roof According to the cantilever theory, stope the first time to the old roof to pressure