When the mining area enter the end stage, the optimization design of final block section and uphill pillar recovery are important.
采区进入收作阶段，最后块段与上山煤柱回收的优化设计、合理开采尤为重要。
2
Under arraying rope pillar function, two pieces of pulley block circles pillar to do left, right nimble swinging, which cause rope winds in regular arrangement.
绳索在排绳柱作用下，两个滑轮组绕柱子左、右灵活摆动，使绳索在卷绳轴形成有规则的排列。
3
Accordingly, the distribution of abutment pressure on the block coal pillar is measured at working face with a steeply inclined seam of the12010 face, NO.