近距离多煤层开采采空区积水防隔水煤岩柱留设研究

Coal and Rock Waterproof Pillar Design for Watered Gob in Mining Close Multi-coalseam

防隔水煤岩柱的合理留设是采空区积水下安全开采的关键。新强煤矿属于近距离煤层群开采,随着开采深度加大,浅部采区开采形成的采空区积水已成为深部延伸开采的主要威胁水体。通过对矿井实际开采情况研究分析,在对具有连通关系的浅部采区进行封闭隔离,隔断其与其他未开采的采区的水力联系的基础上,对上覆煤层和侧方同煤层采空区积水区合理留设防隔水煤岩柱,确定其深部不同煤层的开采上限,实现了近距离多煤层采空区积水下的安全开采。

Rational coal and rock waterproof pillar design is the key to safely mining coal under watered gob .Close multi-coalseams were mined in Xinqiang Colliery.With mining depth increasing , watered gob formed in shallow mining has been main dangerous source for deep mining.By researching actual mining , shallow mining area with connection relationship was closed and isolated , rational water-proof coal and rock pillar was designed and mining upper limits of different coal -seams were obtained , which realized safe mining under watered gob.