断层破碎带变形破坏失稳过程模拟
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摘要
为了研究断层破碎带在采动影响下的变形破坏失稳过程,采用电镜、薄片分析及蠕变力学试验方法分别对范各庄矿F0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。在力学实验的基础上,借助数值仿真软件FLAC3D完成了对断层破碎带变形破坏失稳过程的模拟计算。模拟结果较好地刻画出了承压水对上覆岩层及断层带的影响;开采活动对底板岩层的影响;断层破碎带受开采影响的大小和范围;承压水影响的时间效应和特定水头作用下承压水沿断层导升的高度。
In order to study the distortion and destruction process of fractured fault zone under the mining influence, we carried out the electron microscopy, the thin section analysis and the creep test on original samples and duplicated samples of fault materials. According to test results of the electron microscopy and the thin section analysis of test samples, uniaxial and triaxial creep tests for five group samples, which respectively have three kinds of moisture content, we obtained creep characteristics and the distortion destruction characteristics of fault materials. On the basis of that, the flow-solid coupling numerical simulation was made with the aid of FLAC3D numerical simulation software. The simulation results illustrate the influence of confined water on overlying strata and fault zone, the influence of mining activity on coal floor, the influencing size and scope of fault crushing zone, time effect of confined water.
In order to study the distortion and destruction process of fractured fault zone under the mining influence, we carried out the electron microscopy, the thin section analysis and the creep test on original samples and duplicated samples of fault materials. According to test results of the electron microscopy and the thin section analysis of test samples, uniaxial and triaxial creep tests for five group samples, which respectively have three kinds of moisture content, we obtained creep characteristics and the distortion destruction characteristics of fault materials. On the basis of that, the flow-solid coupling numerical simulation was made with the aid of FLAC3D numerical simulation software. The simulation results illustrate the influence of confined water on overlying strata and fault zone, the influence of mining activity on coal floor, the influencing size and scope of fault crushing zone, time effect of confined water.
引文
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[3]武红岭.张性结构面的力学性质与主应力关系解析[J].地质论评,1999,45(5):449-455.
[4]赵永红,黄杰藩,侯建军,等.岩石细观破裂的实验观测研究及其对认识地震活动性的启示[J].地球物理学报,1995,38(5):627-636.
[5]杨天鸿.岩石破裂过程的渗流特征--理论、模型与应用[M].北京:科学出版社,2004.
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