贵州林歹铝土矿深部带压开采评价

Evaluation of Deep Mining with Pressure of Lindai Bauxite from Guizhou Province

贵州林歹铝土矿水文地质条件复杂,矿层间接底板为栖霞茅口组灰岩含水层,地下水制约了矿山的深部开采。通过对矿体底板隔水层赋存地质条件、隔水性能、构造因素以及下伏含水层水压及富水性的研究,采用量化指标对矿层带压开采做出综合技术评价,并根据矿区岩层组合引入摆佐组和梁山组"复合式"隔水岩体概念。研究结果表明:梁山组、摆佐组隔水层具有良好的隔水效果,矿山深部矿体带压开采可行。

The hydrological condition of Lindai bauxie mine,Guizhou province is composite,the in-direct seam floor is Qixia-Maokou limestone aquifer,the deep mining is restricted by groundwater.The geology conditions,waterproof performance and structural factors of the water-resisting layer of orebody floor are analyzed,the water pressure and water content of underlying aquifer are discussed.Seam mining with pressure is comprehensive technical evaluated by using the quantitative indicators,besides that,ac-cording to the strata combinations of mining area,the concepts of ＂composite type＂water-resisting rock mass of Baizuo formation and Liangshan formation are introduced.The results show that the water-resis-ting effect of the water-resisting layers of Baizuo formation and Liangshan formation are good,so,the scheme of deep mining with pressure is feasible.