摘要
用轴对称线弹性有限单元法，对钻井水溶法进行岩盐厚矿体开采中的溶腔稳定性进行了计算和分析。认为：原岩应力的侧压力系数λ对围岩的稳定性影响很大；当λ＜０．５时，顶板溶成拱形或类似形状对其稳定性有利；当λ＞０．５时，溶腔顶板保持为上溶时的平坦状更有利于溶腔的稳定；当λ较大时，适当增大溶腔直径，其稳定性不会发生明显变化。
A stability of cavity in the solution mining for thick rock salt is calculated and analised using the axial symmetry finite element method.It is believed that the rock stres’s lateral pressure coeficients λ have a great influence upon the stability of wall rocks.In the case of coeficient λ less than 0.5,arched roof or the similar shape fovours the stability of wall rock when λ is large than 0.5,the flat roof favorus the stability of wall rocks.When λ is more large,a stability will don’t change evidenly with a increase of the cavity’s diameter moderately.
出处
《化工矿物与加工》
CAS
1998年第4期15-18,共4页
Industrial Minerals & Processing
