基于FLAC3D的煤矿工作面采前防治水安全性分析
Safety Analysis of Pre-mining Water Control in Coal Mine Working Face Based on FLAC3D
孔晓东 1杨本水1
作者信息
- 1. 安徽建筑大学 土木工程学院,安徽 合肥 230000
- 折叠
摘要
以钱营孜煤矿西三采区为例,采用FLAC3D软件进行回采后上覆岩层垮落带和导水裂隙带破坏特征模拟,预测导水裂隙带高度为 43.45、45.60、45.40 m;垮落带高度分别为 14.23、12.78、13.32 m;预测防砂煤柱高度为26.23,24.78,25.32 m,均小于实际煤岩柱留设高度44 m;工作面回采时顶板上覆岩层垮落带不会影响到"四含",实测采后垮落带高度为 12.13 m,导水裂隙带高度40.19 m,均小于预测数值与实际留设煤岩柱距离.表明W3233 工作面在做好预测预警的前提下具备了留设防砂煤柱的条件.
Abstract
Take the West third mining area of Qianyingzi Coal Mine as an example,FLAC3D software is used to simulate the failure characteristics of overhanging rock caving zone and water-conducting fracture zone after min-ing.The predicted height of water-conducting fracture zone is 43.45,45.60,45.40 m.The height of the collapse band is respectively 14.23 m,12.78 m,13.32 m.The predicted coal pillar height of sand control is 26.23,24.78,25.32 m,which is lower than the actual coal pillar height of 44 m.The caving zone of overlying strata on the roof will not affect the"four contains"during the mining face.The measured height of caving zone after mining is 12.13 m,and the height of water-conducting fracture zone is 40.19 m,both of which are smaller than the distance between the predicted value and the actual coal pillar.It is proved that W3233 working face has the condition of retaining fortified sand coal column under the premise of good prediction and early warning.
关键词
FLAC3D/数值模拟/安全性Key words
Flac3D/numerical simulation/security引用本文复制引用
出版年
2024
NETL
NSTL
万方数据