四川地区矿山地质灾害的敏感性因子影响研究——通江县彭家河滑坡为例
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摘要
通过对四川地区矿山地质灾害的勘查,结合室内试验数据和区域资料的收集整理。采用折线法对矿体稳定性进行计算,分析由地质灾害引发的敏感性因子变化对矿体稳定性的影响。计算结果表明,对矿体稳定性影响敏感系数从大到小因子分别为内摩擦角、粘聚力、重度;由于坡体为碎石土,遇水情况下土体粘聚力下降,降低了土体的抗剪强度;该地质灾害工程治理过程中,首先应采取提高滑动面内摩擦角的工程措施,其次提高滑带土粘聚力。通过对四川地区矿山地质灾害的敏感性分析,为灾害治理措施提供了针对性较强的参考依据,并为地质灾害治理提供新的思路。
Through the exploration of mine geological hazards in Sichuan area, combined with laboratory test data and regional data collection and collation. The stability of ore body is calculated by the broken line method, and the influence of the change of sensitivity factors caused by geological hazards on the stability of ore body is analyzed. The calculation results show that the sensitive factors affecting the stability of ore bodies are internal friction angle, cohesion and gravity, respectively;because the slope is gravel soil, the cohesion of soil decreases under the condition of water, which reduces the shear strength of soil; in the process of engineering treatment of geological hazards, engineering measures should be taken to increase the friction angle in the sliding surface first, and then the cohesion of soil in the sliding zone. Through the sensitivity analysis of mine geological hazards in Sichuan area, this paper provides a strong reference basis for disaster control measures, and provides a new way of thinking for geological hazard control.
Through the exploration of mine geological hazards in Sichuan area, combined with laboratory test data and regional data collection and collation. The stability of ore body is calculated by the broken line method, and the influence of the change of sensitivity factors caused by geological hazards on the stability of ore body is analyzed. The calculation results show that the sensitive factors affecting the stability of ore bodies are internal friction angle, cohesion and gravity, respectively;because the slope is gravel soil, the cohesion of soil decreases under the condition of water, which reduces the shear strength of soil; in the process of engineering treatment of geological hazards, engineering measures should be taken to increase the friction angle in the sliding surface first, and then the cohesion of soil in the sliding zone. Through the sensitivity analysis of mine geological hazards in Sichuan area, this paper provides a strong reference basis for disaster control measures, and provides a new way of thinking for geological hazard control.
引文
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[8]赵勇,刘之葵,王晓华.降雨条件下浅层滑坡渗流模拟与稳定性探讨[J].人民长江,2016,47(18):44-49+55.
[2]许强.四川省8·13特大泥石流灾害特点、成因与启示[J].工程地质学报,2010,18(5):596-608.
[3]倪恒,刘佑荣,龙治国.正交设计在滑坡敏感性分析中的应用[J].岩石力学与工程学报,2002,21(7):989-992.
[4]夏元友,熊海丰.边坡稳定性影响因素敏感性人工神经网络分析[J].岩石力学与工程学报,2004,23(16):2 703-2 707.
[5]柴波,殷坤龙,汪洋,李远耀.基于影响因素分布模型的滑坡稳定性敏感分析[J].岩土力学,2007(12):2624-2628.
[6]刘剑平,朱坤元,陆元鸿,等.2012.应用数理统计[M].上海:华东理工大学出版社.
[7]向灵芝,崔鹏,张建强,等.汶川县地震诱发崩滑灾害影响因素的敏感性分析[J].四川大学学报:工程科学版,2010,,42(5);105-112
[8]赵勇,刘之葵,王晓华.降雨条件下浅层滑坡渗流模拟与稳定性探讨[J].人民长江,2016,47(18):44-49+55.