李家壕煤矿地下水库人工坝体稳定性研究

针对人工坝体稳定性问题,以李家壕煤矿地下水库为工程背景,基于Drucker-Prager准则对人工坝体所能承载的极限水头值以及易破坏位置进行了分析研究。结果表明:受地下水库储水水压的影响,坝体易在内表面中点以及外表面四边中点处出现DP峰值,且外表面的DP值大于内表面的DP值。外表面底边中点处DP峰值最大,接着是顶边中点处,左右两边中点次之,中心处峰值最小,并且左右两边中点处峰值呈近似对称分布。坝体的外表面底边中点处是最易发生失稳破坏的位置,并进一步计算得出人工坝体所能承载的极限水头值为17.8 m。并得到了Comsol数值模拟以及现场实测数据的验证。

Stability analysis of mine underground reservoir artificial dam in Lijiahao Mine

Aiming at the stability of the artificial dam,taking Lijiahao coal mine underground reservoir as the engineering background,based on Drucker-Prager criterion,this paper researches the limit head value and the easy damage position about the artificial dam.Results show that where the DP peak appear in is the surface of dam body and the midpoint of the outer surface,and the DP peak of the outer surface is larger than the inner surface.The value of theDP peak is biggest in the outer surface of bottom midpoint,followed by the top side of the midpoint,on the both sides of the center point,the minimum peak,and both sides at the midpoint of peak is approximately symmetrical.The midpoint of the outer surface of the bottom edge is the most prone to failure location.Further study finds that the limit head is the 17.8 m of the artificial dam,and the result of the Comsol numerical simulation and field test data are obtained.