一、地质情况我鑛的具体岩层分布如图1所示。二、顶板管理中存在的问题我鑛六中段以上是采用留鑛法采鑛的,但六中段以下鑛体成缓倾斜,顶板很难维持。此法虽不适合,但目前仍然采用着。接触玢岩(f=4～8)在我鑛是一种最不稳固的岩石,经常落帮,给采鑛工作带来了严重的威胁,这样不仅增加了处理大块工作,使放鑛困难,并且增大了 First, the geological conditions I mine specific rock distribution shown in Figure 1. Second, the problems in the roof management My mine six or more above is the use of mineral retention mining method, but the six sub-ore body into a gentle tilt, the roof is difficult to maintain. Although this method is not suitable, but is still used. Contact rock (f = 4 ~ 8) is one of the most unstable rock in mine, often falling to the mine, poses a serious threat to the mining work, which not only increases the handling of large work, making it difficult to release ore , And increased