摘要
为研究渗流场和应力场共同作用下防水矿柱宽度合理留设问题,结合新庄铜铅锌矿17A号勘探线的实际地质条件,运用数值模拟计算软件FLAC^(3D),研究了初始渗流场的孔隙水压力和渗流速度矢量分布特征,计算了矿体回采充填过程中7个工作面的涌水量,并模拟了工作面顶板的导水裂隙带分布情况,与经验公式算得的防水矿柱高度进行比较.模拟结果表明,工作面与含水层的距离越小,渗流速度越大,涌水量越大,导水裂隙带范围越大,突水的危险也就越大;从渗流场涌水量和应力场导水裂隙带两方面来综合衡量,防水矿柱留设的高度取为40m,相比经验公式的结果提高了矿体利用率.
The goal is to research reasonable design of the waterproof pillar width under the interaction of the seepage field and stress field. Based on actual geological conditions of exploration line 17A in Xinzhuang Mining, the numerical simulation software FLAC^3D is used for studying initial pore water pressure and seepage velocity distribution characteristics, calculating water inflow of seven working faces in the process of ore body excavation, and simulating fractured water-conducting zone of the working face roof. The calculation results are compared with the height of waterproof pillar obtained by empirical formula. Simulation results show that the distance between the working surface and the aquifer is smaller; the greater the flow velocity, the greater the water inflow, and the fractured water-conducting zone is wider; so the risk of water inrush is higher. Considering both the water inflow and the fractured water-conducting zone, the waterproof pillar height is selected as 40 m. It improves the utilization ratio of the ore body compared with the result of empirical formula.
出处
《武汉大学学报（工学版）》
CAS
CSCD
北大核心
2017年第3期368-374,共7页
Engineering Journal of Wuhan University
基金
中国石油大学(北京)石油工程教育部重点实验室开放课题(编号:206240100062)
国家自然科学研究基金海外及港澳学者合作项目(编号:51428902)
关键词
防水矿柱
FLAC^3D
涌水量
导水裂隙带
waterproof pillar
FLAC^3D
water inflow
fractured water-conducting zone
