摘要
为了确定煤矿地下水库人工坝体易破坏位置及极限水头值,对人工坝体建立薄板力学模型,基于弹性力学薄板理论推导得出坝体应力分布函数,以李家壕地下水库为参考,利用FLAC3D数值模拟软件对理论公式进行验证和比较,并分别采用摩尔库伦模型和D-P模型对比坝体塑性区分布情况。结果表明坝体最先破坏位置为正面两侧中心,其次分别为正面底部中心、正面顶部中心、背面中心区域;FLAC3D中使用摩尔库伦模型与理论分析所得坝体破坏情况相符,更准确地反映了坝体破坏特点。对于坝体失稳破坏判断,摩尔库伦模型安全系数高于D-P模型,以使用摩尔库伦模型的破坏情况为参考,确定李家壕人工坝体极限水头值为24 m。
In order to determine the vulnerable position and the limit water head value of the artificial dam body of the underground reservoir in the coal mine,the mechanical model of the artificial dam body was established,and the stress distribution function of the dam body was derived based on the thin plate theory of elastic mechanics.Lijiahao underground reservoir was a reference,the theoretical formula was verified and compared by FLAC3D numerical simulation software,and the dam body plastic was compared by using Mohr Coulomb model and D-P model respectively.The results show that the first failure position of the dam body is the center of both sides of the front,followed by the center of the bottom of the front,the center of the top of the front and the center of the back.The use of the Mohr Coulomb model in FLAC3D is consistent with the damage analysis of the dam body,which more accurately reflects the damage characteristics of the dam.For the failure prediction of the dam body,the safety factor of the Moor Coulomb model is higher than that of the D-P model.Taking the damage of the Moor Coulomb model as a reference,the limit water head value of the artificial dam of Lijiatun is determined to be 24 m.
作者
黄永军
HUANG Yongjun(No.2 Mine,Lu′an Xinjiang Coal Chemical Co.,Ltd.)
出处
《现代矿业》
CAS
2020年第9期58-61,103,共5页
Modern Mining
