Effective recovery of residual coal was realized by controlling centralized stress of wedge pillar in gob and rational equipment match of recovery mining face.

• 通过对刀柱老采区煤柱集中应力的控制,以及复采工作面装备的合理配套,实现刀柱下遗留煤体的有效回收,提高煤炭资源采出率,增加企业经济效益。