破碎断层变形破坏过程的试验研究

范各庄矿F0断层是一条走向贯穿整个井田的破碎断层,极大地影响了该矿采区布置及矿井深部开拓,对矿井的安全生产具有重大威胁。为了研究F0断层在采动影响下的变形破坏过程,采用电镜、薄片及蠕变力学试验方法分别对断层物质的原样和3种含水量、5组样品的复制样进行了分析研究。试验表明:围压效应、结构效应、含水量效应均对断层物质的性质产生巨大影响;断层物质具有明显的流动变形特征;结构面的存在、承压水的作用以及围压的改变极大地影响着断层物质的性质。试验研究结果对于分析断裂滞后突水具有重要意义。

Test of the distortion and destruction process of broken fault zone

The F0 fault of Fangezhuang coal mine threads the whole mine field,which threatens the safe production of the coal mine.In order to research the failure process of this fault under the mining influence,we adopted electron microscope,the thin section analysis and the creep test on the fault matter's original sample and 5 group duplication samples with 3 kinds water content.The tests indicate that the confining pressure,structure effect and water content effect all have great influence on the capability of the fault material.The fault material has evident flow deformation characteristic.The existence of discontinuities,the effect of confined water and the change of confining pressure all influence the capability of fault material.The study has great practical significances for the analysis of logging water inrush.