不同岩性侧压比随深度变化规律探讨
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摘要
大量查阅中国范围内的岩浆岩、沉积岩和变质岩中的实测地应力资料,采用与霍克(E.Hoek)和布朗(E.T.Brown)同样的回归方法得到不同岩性情况下的回归曲线。同时,根据朱涣春等发表的《不同岩石中的地应力分布》文中回归公式得出的世界范围不同岩性情况下侧压比随深度的变化曲线,并进行了比较分析。得到了较为理想的结果,之所以不同岩性的侧压比随深度有不同的变化规律主要是原因是三大类岩石形成机理各不相同,并进一步讨论了影响侧压比分布的其它因素。
By consulting a vast amount of measured ground stress data of magmatic rocks,sedimentary rocks and metamorphic rocks in China and using the same regressive method as E.Hoek and E.T.Brown,the regression curves on different lithologies are got.Meanwhile,according to regression equations in "Ground Stresses Distribution on Different Rocks" published by ZHU Huan-chuan and others,the worldwide side pressure ratio-depth curves on different lithologies are got;and a comparison and an analysis is made,obtaining fairly ideal results.The main reason of why different lithology's side pressure ratios have different change laws with depths is that the formed mechanisms of the three main kinds of rocks have nothing in common with each other;moreover other factors influencing side pressure distribution are further discussed.
By consulting a vast amount of measured ground stress data of magmatic rocks,sedimentary rocks and metamorphic rocks in China and using the same regressive method as E.Hoek and E.T.Brown,the regression curves on different lithologies are got.Meanwhile,according to regression equations in "Ground Stresses Distribution on Different Rocks" published by ZHU Huan-chuan and others,the worldwide side pressure ratio-depth curves on different lithologies are got;and a comparison and an analysis is made,obtaining fairly ideal results.The main reason of why different lithology's side pressure ratios have different change laws with depths is that the formed mechanisms of the three main kinds of rocks have nothing in common with each other;moreover other factors influencing side pressure distribution are further discussed.
引文
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[4]肖尚斌,张艳君.蒲石河抽水蓄能电站地下厂房地应力特征及岩爆判别[J].东北水利水电,1996,(7):14~16.
[5]钟作武,龚壁新,吕国湘.三峡工程地下厂房区域地应力测量与研究[J].长江科学院院报,1996,13(增):17~19.
[6]董诚,等.安庆铜矿地应力测量[J].地质力学学报,2001,7(3):17~19.
[7]吴满路,廖椿庭.大茅隧道地应力测量及围岩体稳定性研究[J].地质力学学报,2000,6(2)71~76.
[2]蔡美峰.岩石力学与工程[M].北京:科学出版社,2002.
[3]尹健民,等.某高速公路隧道区水压致裂地应力测量与分析[J].岩石力学与工程学报,2001,20(增):1827~1830.
[4]肖尚斌,张艳君.蒲石河抽水蓄能电站地下厂房地应力特征及岩爆判别[J].东北水利水电,1996,(7):14~16.
[5]钟作武,龚壁新,吕国湘.三峡工程地下厂房区域地应力测量与研究[J].长江科学院院报,1996,13(增):17~19.
[6]董诚,等.安庆铜矿地应力测量[J].地质力学学报,2001,7(3):17~19.
[7]吴满路,廖椿庭.大茅隧道地应力测量及围岩体稳定性研究[J].地质力学学报,2000,6(2)71~76.
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