矿山巷道不同于地面工程结构的最大特点就是巷道围岩不仅是施加外荷载的来源,同时也是承担自身荷载的结构之一。换句话说,围岩本身具有一定的自承能力。这一点,已被工程实践所证实。比如,有些服务年限不长的巷道,在无支护或支护很弱的情况下,还完好无损,具有一定的自承能力;有些巷道、矿柱的表面在出现了裂缝、断裂、甚至片邦的情况下,并不立刻破坏,还具有一定的承载能力。这些事实,愈来愈被人们所接受,正是这点,才使得传统的支护方式 Mine roadway is different from the most prominent feature of the ground engineering structure is the roadway surrounding rock is not only the source of external load, but also to assume its own load of one of the structures. In other words, the surrounding rock itself has a certain degree of self-supporting capacity. This has been confirmed by engineering practice. For example, some tunnels with short service life are intact or weak with no support or weak support and have certain self-supporting capacity. In some tunnels and pillars, there are cracks, breaks and even pieces on the surface In the case of the state, it is not immediately destroyed, but it also has some bearing capacity. These facts, more and more people are accepted, it is precisely this point, it makes the traditional way of support