万福煤矿深厚表土层冻土力学性质试验研究
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摘要
针对山东万福煤矿深厚表土采用冻结法施工的基础数据不足及工程经验欠缺等难题,采集万福煤矿的深部土样,开展深厚表土层冻土力学性能参数的测试与研究。结果表明:在本试验设计的冻结温度下,冻土试样的单轴抗压强度、三轴抗压强度、蠕变应力及冻胀力随着冻结温度的降低均呈现增大的趋势,同时深部表土层的冻土蠕变性质表现尤为明显,含水率和采样深度对冻结壁设计的影响不可忽略。通过对原状土单轴压缩试验、三轴抗压强度试验、单轴蠕变试验、冻胀试验等数据进行多元回归分析,综合考虑冻结温度、含水率和采样深度对冻土试样力学性能的影响,归纳得到的数学模型拟合程度高,相关性好,为深厚表土层冻结壁的设计和在不同地层地质条件下力学参数的确定提供了技术支撑。
Aiming at the problems of inadequate basic theory and lack of engineering experience in the construction of deep surface soil in Wanfu Coal Mine,it is required to collect the soil samples of the Wanfu deep well and to carry out the testing and analysis of the mechanical properties of the frozen soil.The results indicated:At the freezing temperature designed in this experiment,the uniaxial compressive strength,triaxial compressive strength,creep stress,and frost-heaving force of the frozen soil samples all show an increasing trend with the decrease of the freezing temperature.At the same time,the creep performance of frozen soil in the deep surface soil layer is particularly obvious.The influence of water content and sampling depth on the design of frozen wall can not be ignored.Therefore,according to the data of the single axis compression test,the three axis compressive strength test,the uniaxial creep test and the frost heave test,the multiple regression analysis is carried out,comprehensive consideration of the effects of freezing temperature,moisture content and sampling depth on the mechanical properties of frozen soil specimens,the mathematical models possess high degree of fit and good correlation.It provides technical support for the design of the frozen wall of deep surface layer and the determination of mechanical parameters under different geological conditions.
Aiming at the problems of inadequate basic theory and lack of engineering experience in the construction of deep surface soil in Wanfu Coal Mine,it is required to collect the soil samples of the Wanfu deep well and to carry out the testing and analysis of the mechanical properties of the frozen soil.The results indicated:At the freezing temperature designed in this experiment,the uniaxial compressive strength,triaxial compressive strength,creep stress,and frost-heaving force of the frozen soil samples all show an increasing trend with the decrease of the freezing temperature.At the same time,the creep performance of frozen soil in the deep surface soil layer is particularly obvious.The influence of water content and sampling depth on the design of frozen wall can not be ignored.Therefore,according to the data of the single axis compression test,the three axis compressive strength test,the uniaxial creep test and the frost heave test,the multiple regression analysis is carried out,comprehensive consideration of the effects of freezing temperature,moisture content and sampling depth on the mechanical properties of frozen soil specimens,the mathematical models possess high degree of fit and good correlation.It provides technical support for the design of the frozen wall of deep surface layer and the determination of mechanical parameters under different geological conditions.
引文
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[6] 尹楠,李双洋,施烨辉,等.不同围压下冻结黄土胶结行为的离散元分析[J]. 冰川冻土,2017,39(4):858-867. Yin Nan,Li Shuangyang,Shi Yehui,et al. Discrete element analysis of cemented behavior of frozen loess under different confining pressures[J]. Journal of Glaciology and Geocryology,2017,39(4):858-867.
[7] 侯运炳,何尚森,周殿奇,等.特厚煤层大采高综放工作面覆岩结构及支架工作阻力研究[J]. 矿业科学学报,2017,2(1):42-48. Hou Yunbing,He Shangsen,Zhou Dianqi,et al. Analysis of overburden structure and support working resistance of working face in fully-mechanized top coal caving with large mining height in ultra thick coal seam[J]. Journal of Mining Science and Technology,2017,2(1):42-48.
[8] 路建国,张明义,张熙胤,等.冻土水热力耦合研究现状及进展[J]. 冰川冻土,2017,39(1):102-111. Lu Jianguo,Zhang Mingyi,Zhang Xiyin,et al. Review of the coupled hydro-thermo-mechanical interaction of frozen soil[J]. Journal of Glaciology and Geocryology,2017,39(1):102-111.
[9] 李宁,程国栋,徐学祖,等.冻土力学的研究进展与思考[J]. 力学进展,2001(1):95-102. Li Ning,Chen Guodong,Xu Xuezu,et al. Research progress and consideration of permafrost mechanics[J]. Advances in Mechanics,2001(1):95-102.
[10] 孟浩,贾尚伟,程占博.下位特厚煤层回采巷道合理布置分析[J]. 矿业科学学报,2017,2(3):251-259. Meng Hao,Jia Shangwei,Cheng Zhanbo.Analysis of reasonable position layout of lower and large thickness coal seam[J]. Journal of Mining Science and Technology,2017,2(3):251-259.
[11] 徐湘田,赖远明,刘峰,等.冻土中几类力学试验方法的探讨[J]. 冰川冻土,2011,33(5):1132-1138. Xu Xiangtian,Lai Yuanming,Liu Feng,et al. Discussion on several kinds of mechanical test methods in Permafrost[J]. Journal of Glaciology and Geocryology,2011,33(5):1132-1138.
[12] 王伸远,李栋伟.深部人工冻结黏土三轴蠕变试验研究[J]. 冰川冻土,2014,36(6):1479-1483. Wang Shenyuan,Li Dongwei.Experimental study of the triaxial creep features of deep artificial frozen clay[J]. Journal of Glaciology and Geocryology,2014,36(6):1479-1483.
[13] 刘波,刘念,李东阳,等.鄂尔多斯深部富水砂岩冻结强度的试验研究[J]. 矿业科学学报,2017,2(1):25-32. Liu Bo,Liu Nian,Li Dongyang,et al. Frozen strength test on deep water-rich sandstone in Ordos[J]. Journal of Mining Science and Technology,2017,2(1):25-32.
[14] 常小晓,马巍,王大雁.高围压下冻结黏土的抗压强度试验研究[J]. 冰川冻土,2007,29(4):636-639. Chang Xiaoxiao,Ma Wei,Wang Dayan.Experimental study on compressive strength of frozen clay under high confining pressure[J]. Journal of Glaciology and Geocryology,2007,29(4):636-639.
[15] 黄星,李东庆,明锋,等.冻土的单轴抗压、抗拉强度特性试验研究[J]. 冰川冻土,2016,38(5):1346-1352. Huang Xing,Li Dongqing,Ming Feng,et al. Experimental study of the compressive and tensile strengths of artificial frozen soil[J]. Journal of Glaciology and Geocryology,2016,38(5):1346-1352.
[16] 焦贵德,赵淑萍,马巍,等.循环荷载下高温冻土的变形和强度特性[J]. 岩土工程学报,2013,35(8):1553-1558. Jiao Guide,Zhao Shuping,Ma Wei,et al. Deformation and strength of warm frozen soils under cyclic loading[J]. Chinese Journal of Geotechnical Engineering,2013,35(8):1553-1558.
[17] 中华人民共和国住房和城乡建设部.JGJ/T 87—2012 建筑工程地质勘探与取样技术规程[S]. 北京:中国建筑工业出版社,2012.
[18] 国家安全生产监督管理总局.MT/T 593.1—2011 人工冻土物理力学性能试验,第1部分:人工冻土试验取样及试样制备方法[S]. 北京:煤炭工业出版社,2011.
[19] 张公.冻土动蠕变特性研究[D]. 哈尔滨:黑龙江科技大学,2014.
[2] 徐学祖,王家澄,张立新.冻土物理学[M]. 北京:科学出版社,2001.
[3] 陈敦,马巍,赵淑萍,等.冻土动力学研究的现状及展望[J]. 冰川冻土,2017,39(4):868-883. Chen Dun,Ma Wei,Zhao Shuping,et al. Recent research progress and prospect of frozen soil dynamics[J]. Journal of Glaciology and Geocryology,2017,39(4):868-883.
[4] 程占博,孔德中,杨敬虎.综放工作面厚硬顶板破断特征与支架工作阻力确定[J]. 矿业科学学报,2016,1(2):172-180. Cheng Zhanbo,Kong Dezhong,Yang Jinghu.The breaking characteristics of thick-hard roof and determination of support capacity in fully mechanized caving face[J]. Journal of Mining Science and Technology,2016,1(2):172-180.
[5] 孙凯,陈正林,陈剑,等.基于分数阶导数的冻土蠕变本构模型[J]. 地下空间与工程学报,2018,14(1):19-25. Sun Kai,Chen Zhenglin,Chen Jian,et al. A creep constitutive model for frozen soil based on fractional derivative[J]. Chinese Journal of Underground Space and Engineering,2018,14(1):19-25.
[6] 尹楠,李双洋,施烨辉,等.不同围压下冻结黄土胶结行为的离散元分析[J]. 冰川冻土,2017,39(4):858-867. Yin Nan,Li Shuangyang,Shi Yehui,et al. Discrete element analysis of cemented behavior of frozen loess under different confining pressures[J]. Journal of Glaciology and Geocryology,2017,39(4):858-867.
[7] 侯运炳,何尚森,周殿奇,等.特厚煤层大采高综放工作面覆岩结构及支架工作阻力研究[J]. 矿业科学学报,2017,2(1):42-48. Hou Yunbing,He Shangsen,Zhou Dianqi,et al. Analysis of overburden structure and support working resistance of working face in fully-mechanized top coal caving with large mining height in ultra thick coal seam[J]. Journal of Mining Science and Technology,2017,2(1):42-48.
[8] 路建国,张明义,张熙胤,等.冻土水热力耦合研究现状及进展[J]. 冰川冻土,2017,39(1):102-111. Lu Jianguo,Zhang Mingyi,Zhang Xiyin,et al. Review of the coupled hydro-thermo-mechanical interaction of frozen soil[J]. Journal of Glaciology and Geocryology,2017,39(1):102-111.
[9] 李宁,程国栋,徐学祖,等.冻土力学的研究进展与思考[J]. 力学进展,2001(1):95-102. Li Ning,Chen Guodong,Xu Xuezu,et al. Research progress and consideration of permafrost mechanics[J]. Advances in Mechanics,2001(1):95-102.
[10] 孟浩,贾尚伟,程占博.下位特厚煤层回采巷道合理布置分析[J]. 矿业科学学报,2017,2(3):251-259. Meng Hao,Jia Shangwei,Cheng Zhanbo.Analysis of reasonable position layout of lower and large thickness coal seam[J]. Journal of Mining Science and Technology,2017,2(3):251-259.
[11] 徐湘田,赖远明,刘峰,等.冻土中几类力学试验方法的探讨[J]. 冰川冻土,2011,33(5):1132-1138. Xu Xiangtian,Lai Yuanming,Liu Feng,et al. Discussion on several kinds of mechanical test methods in Permafrost[J]. Journal of Glaciology and Geocryology,2011,33(5):1132-1138.
[12] 王伸远,李栋伟.深部人工冻结黏土三轴蠕变试验研究[J]. 冰川冻土,2014,36(6):1479-1483. Wang Shenyuan,Li Dongwei.Experimental study of the triaxial creep features of deep artificial frozen clay[J]. Journal of Glaciology and Geocryology,2014,36(6):1479-1483.
[13] 刘波,刘念,李东阳,等.鄂尔多斯深部富水砂岩冻结强度的试验研究[J]. 矿业科学学报,2017,2(1):25-32. Liu Bo,Liu Nian,Li Dongyang,et al. Frozen strength test on deep water-rich sandstone in Ordos[J]. Journal of Mining Science and Technology,2017,2(1):25-32.
[14] 常小晓,马巍,王大雁.高围压下冻结黏土的抗压强度试验研究[J]. 冰川冻土,2007,29(4):636-639. Chang Xiaoxiao,Ma Wei,Wang Dayan.Experimental study on compressive strength of frozen clay under high confining pressure[J]. Journal of Glaciology and Geocryology,2007,29(4):636-639.
[15] 黄星,李东庆,明锋,等.冻土的单轴抗压、抗拉强度特性试验研究[J]. 冰川冻土,2016,38(5):1346-1352. Huang Xing,Li Dongqing,Ming Feng,et al. Experimental study of the compressive and tensile strengths of artificial frozen soil[J]. Journal of Glaciology and Geocryology,2016,38(5):1346-1352.
[16] 焦贵德,赵淑萍,马巍,等.循环荷载下高温冻土的变形和强度特性[J]. 岩土工程学报,2013,35(8):1553-1558. Jiao Guide,Zhao Shuping,Ma Wei,et al. Deformation and strength of warm frozen soils under cyclic loading[J]. Chinese Journal of Geotechnical Engineering,2013,35(8):1553-1558.
[17] 中华人民共和国住房和城乡建设部.JGJ/T 87—2012 建筑工程地质勘探与取样技术规程[S]. 北京:中国建筑工业出版社,2012.
[18] 国家安全生产监督管理总局.MT/T 593.1—2011 人工冻土物理力学性能试验,第1部分:人工冻土试验取样及试样制备方法[S]. 北京:煤炭工业出版社,2011.
[19] 张公.冻土动蠕变特性研究[D]. 哈尔滨:黑龙江科技大学,2014.
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