孔隙水压力重分布对排土场边坡稳定性影响规律研究
Influence of pore water pressure redistribution on slope stability of waste dump
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摘要: 为了研究不同孔隙水压力重分布作用下排土场边坡稳定性差异情况并进行稳定性评价，根据某矿区排土场8—9月实际地下水位分布，分析水压力重分布对边坡稳定性影响机理；通过SLOPE/W模块模拟不同孔隙水压力分布时边坡稳定性差异及安全系数变化情况。结果表明：孔隙水压力重分布后会使坡体内部孔隙空间改变，加速入渗作用，造成排土场边坡不同程度弱化；随着负孔隙水压力分布范围的减小和扩大，边坡基质吸力改变，安全系数呈先减小后增大趋势；边坡安全系数增加至1.421时地下水位高度降低30 m，整体靠近基底，不再对排土场边坡稳定性产生影响。Abstract: In order to study the stability difference of dump slope under different pore water pressure redistribution and evaluate the stability, according to the actual groundwater level distribution of a mine dump from August to September, the influence mechanism of water pressure redistribution on slope stability is analyzed. SLOPE/W module is used to simulate the slope stability difference and safety factor variation under different pore water pressure distribution. The results show that the redistribution of pore water pressure will change the pore space in the slope, accelerate the infiltration, and weaken the slope of waste dump in different degrees. With the decrease and expansion of the negative pore water pressure distribution range, the matrix suction of the slope changes and the safety factor first decreases and then increases. When the slope safety factor increases to 1.421, the groundwater level decreases by 30 m. It is close to the basement as a whole and will no longer affect the slope stability of waste dump.
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Keywords:
- pore water pressure /
- numerical simulation /
- slope stability /
- waste dump /
- SLOPE/W
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[1] 中矿（北京）煤炭产业景气指数课题组．2019—2020年中国煤炭产业经济形势研究报告[J]．中国煤炭，2020，46（3）：5－12. Research Group of China Mining（Ｂｅｉｊｉｎｇ） Coal Industry Prosperity Index.Research report on economic situation of China’s coal industry from 2019 to 2020[J]. China Coal, 2020, 46（3）: 5-12.
[2] 李浩荡，佘长超，周永利，等．我国露天煤矿开采技术综述及展望[J]．煤炭科学技术，2019，47（10）：24－35. LI Haodang, SHE Changchao, ZHOU Yongli, et al. Summary and prospect of open-pit coal mining technology in China[J]. Coal Science and Technology, 2019, 47（10）: 24-35.
[3] 豆红强．降雨入渗—重分布下土质边坡稳定性研究[D]．杭州：浙江大学，2015. [4] 常晓军，王德伟，唐业旗．中国滑坡降雨试验的研究现状与发展趋势[J]．沉积与特提斯地质，2010，30（1）：98－102. CHANG Xiaojun, WANG Dewei, TANG Yeqi. Simulation experiments of the rainfall-induced landslides in China:insights and foresights[J]. Sedimentary Geology and Tethyan Geology, 2010, 30（1）: 98-102.
[5] 韩流，舒继森，尚涛，等．排土场散体软岩重塑物理力学参数研究[J]．采矿与安全工程学报，2019，36（4）：820－826. HAN Liu, SHU Jisen, SHANG Tao, et al. Experiment study on the physical and mechanical parameters of soft rock remolding in waste dump[J]. Journal of Mining & Safety Engineering, 2019, 36（4）: 820-826.
[6] 韩万东，陈冉．降雨作用下排土场边坡应力变化及稳定性研究[J]．煤矿安全，2018，49（8）：262－265. HAN Wandong, CHEN Ran. Study on stress change and stability of dump slope under rainfall[J]. Safety in Coal Mines, 2018, 49（8）: 262-265.
[7] 陶志刚，李华鑫，曹辉，等．降雨条件下全段高排土场边坡稳定性模型实验研究[J/ＯＬ]．煤炭学报：1－13.（2020－07－28）. TAO Zhigang, LI Huaxin, CAO Hui, et al. Model test study on the slope stability of full-section high dump under rainfall[J/OL]. Journal of China Coal Society: 1-13.（2020-07-28）.
[8] 刘云生．降雨对层状软岩边坡的影响规律分析[J]．煤矿安全，2020，51（3）：235－238. LIU Yunsheng. Analysis of the influence law of rainfall on layered soft rock slope[J]. Safety in Coal Mines, 2020, 51（3）: 235-238.
[9] 马雄德，范立民，严戈，等．植被对矿区地下水位变化响应研究[J]．煤炭学报，2017，42（1）：44. MA Xiongde, FAN Limin, YAN Ge, et al. Vegetation responses to groundwater level change in mining area[J]. Journal of China Coal Society, 2017, 42（1）: 44.
[10] S Feng, H W Liu, C W W Ng. Dimensional analysis of pore-water pressure response in a vegetated infinite slope[J]. Canadian Geotechnical Journal, 2019, 56（8）: https://doi.org/10.1139/cgj-2018-0272. [11] 雷华阳，郝琪，冯双喜，等．不同温度模式下软黏土孔隙水压力变化规律与应力-应变特性研究[J/OL]．岩石力学与工程学报：1－11.（2020－10－20）. LEI Huayang, HAO Qi, FENG Shuangxi, et al. Study on development of pore water pressure and stress-strain characteristics of soft clay under different temperature modes[J/OL]. Chinese Journal of Rock Mechanics and Engineering: 1-11.（2020-10-20）.
[12] 师旭超，孙运德．线性卸荷作用下软土超孔隙水压力变化规律分析[J]．岩土力学，2020，41（4）：1333-1338. SHI Xuchao, SUN Yunde. Analysis of the evolution of excess pore water pressure in soft soil under linear unloading[J]. Rock and Soil Mechanics, 2020, 41（4）: 1333-1338.
[13] Xuecheng Gao, Hanlong Liu, Wengang Zhang, et al. Influences of reservoir water level drawdown on slope stability and reliability analysis[J]. Georisk: Assessment and Management of Risk for Engineered Systems and Geohazards, 2019, 13（2）: 145-153. [14] 潘永亮，简文星，李林均，等．基于改进Ｇｒｅｅｎ－Ａｍｐｔ模型的花岗岩残积土边坡降雨入渗规律研究[J/OＬ]．岩土力学，2020（8）：1－8．（2020－10－11）. PAN Yongliang, JIAN Wenxing, LI Linjun, et al. A study on the rainfall infiltration of granite residual soil slope with an improved Green-Ampt model[J/OL]. Rock and Soil Mechanics, 2020（8）: 1-8.（2020-10-11）.
[15] 岳黎斌．降雨入渗下黄土地基渗流规律与湿陷特征研究[D]．西安：西安理工大学，2019. [16] 孙子涵，王述红，杨天娇，等．降雨条件下多层土坡入渗机理与稳定性分析[J]．东北大学学报（自然科学版），2020，41（8）：1201－1208. SUN Zihan, WANG Shuhong, YANG Tianjiao, et al. Infiltration mechanism and stability analysis of multi layer soil slope under rainfall conditions[J]. Journal of Northeastern University（Natural Science）, 2020, 41（8）: 1201-1208.
[17] 林国财，谢兴华，阮怀宁，等．降雨入渗边坡非饱和渗流过程及稳定性变化研究[J]．水利水运工程学报，2019（3）：95－102. LIN Guocai, XIE Xinghua, RUAN Huaining, et al. Study on slope stability weakening process along with infiltration by rainfall[J]. Hydro-Science and Engineering, 2019（3）: 95-102.
[18] 向延虎，江威．降雨条件下含裂隙坡积土边坡的渗流特性研究[J]．交通科学与工程，2020，36（2）：29－34. XIANG Yanhu, JIANG Wei. Research on seepage characteristics of fissured soil slope under rainfall condition[J]. Journal of Transport Science and Engineering, 2020, 36（2）: 29-34.
[19] Jing-shu Xu, Xiao-li Yang. Effects of Seismic Force and Pore Water Pressure on Three Dimensional Slope Stability in Nonhomogeneous and Anisotropic Soil[J]. KSCE Journal of Civil Engineering, 2018, 22（5）: 1720. [20] Wulandari S N, Li A J, Wahyudi H. Effects of pore water pressure on cohesive-frictional slope stability by limit analysis[J]. IOP Conference Series Earth and Environmental ence, 2019, 351: 012015. [21] 夏开宗，陈从新，刘秀敏，等．水力作用下缓倾顺层复合介质边坡滑移破坏机制分析[J]．岩石力学与工程学报，2014，33（Ｓ2）：3766－3775. XIA Kaizong, CHEN Congxin, LIU Xiumin, et al. Analysis of sliding failure mechanism of gently inclined bedding compound rock mass slope under hyduaulic pressure[J]. Chinese Journal of Rock Mechanics and Engineering, 2014, 33（S2）: 3766-3775.
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