深部岩体地应力场分异特性研究

doi:10.13722/j.cnki.jrme.2019.0307

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摘要以华北平原某深部资源勘探工程为背景，根据井工设施、开采及地面工业场地设计要求，在断层附近不同位置布置勘测钻孔，进行超千米深部岩体水压致裂法地应力测量，通过对断层附近6个钻孔的试验与分析，揭示断层附近地应力场的分异特性及其变化规律。研究表明，断层附近的最大水平主应力 ?[26.35 MPa，55.47 MPa]，应力集中系数为1.05～1.44； ?[1.22，1.65]，平均为1.56，比值与远场应力的相当； ?[5.90，22.80]，平均为16.42，高于远场应力的差值。在断层附近应力方向将发生偏转，范围为0.60°～30.83°，平均偏转24.2°。地应力在断层之间、断层的交汇处及断层下盘发生显著的变化，表现为应力集中、水平主应力差值增大、方向重大偏转及百米地应力增量增大，且位置不同，地应力存在明显的分异性。

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	谭卓英
	夏志远
	丁宇
	Roland Againglo
	刘焕新
	岳鹏君

关键词 ：岩石力学, 深部岩体, 地应力, 断层, 分异性, 分布规律

Abstract：Based on a deep resource exploration project in the Plain of North China，six boreholes are arranged at various positions near the faults according to the requirements of mine facilities，mining and ground industrial sites design，and hydraulic fracturing technique is implemented for measurement of in-situ stress. By comparisons of stresses between near and far to the faults，the variability of in-situ stress near the faults and its change rule is revealed. The results have shown that the maximum horizontal principal stress ?[26.35 MPa，55.47 MPa]，stress concentration factor is 1.05–1.44； ?[1.22，1.65]，1.56 in average，which is approximately equivalent to that of far field stress； ?[5.90，22.80]，16.42 in average，exceeding the differential value far to the faults. In the adjacent zone，the orientation of in-situ stress near to the faults will diverse，the variation range of diversion is 0.60°–30.83°，24.2° in average. In-situ stress will evidently change at the lower wall of fault，between the faults，and at the junctions，it presents stress concentration，increase in differential value between horizontal principal stresses，significantly diversion in the orientation of stress and increase in stress increment per hundred meters at vertical depth. It shows significant difference with the change of measuring position.

Key words： rock mechanics rock mass at great depth in-situ stress fault differentiation distributing disciplinarian

引用本文:

谭卓英，夏志远，丁宇，Roland Againglo，刘焕新，岳鹏君. 深部岩体地应力场分异特性研究[J]. 岩石力学与工程学报, 2019, 38(S2): 3330-3337.
TAN Zhuoying，XIA Zhiyuan，DING Yu，Roland Againglo，LIU Huanxin，YUE Pengjun. Differentiation characteristics of insitu stress in deep rock. , 2019, 38(S2): 3330-3337.

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http://rockmech.whrsm.ac.cn/CN/10.13722/j.cnki.jrme.2019.0307 或 http://rockmech.whrsm.ac.cn/CN/Y2019/V38/IS2/3330

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