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ASR法在井下矿山地应力测试中的应用前景分析

孙东生 陈群策 张延庆

孙东生, 陈群策, 张延庆, 2020. ASR法在井下矿山地应力测试中的应用前景分析. 地质力学学报, 26 (1): 33-38. DOI: 10.12090/j.issn.1006-6616.2020.26.01.003
引用本文: 孙东生, 陈群策, 张延庆, 2020. ASR法在井下矿山地应力测试中的应用前景分析. 地质力学学报, 26 (1): 33-38. DOI: 10.12090/j.issn.1006-6616.2020.26.01.003
SUN Dongsheng, CHEN Qunce, ZHANG Yanqing, 2020. Analysis on the application prospect of ASR in-situ stress measurement method in underground mine. Journal of Geomechanics, 26 (1): 33-38. DOI: 10.12090/j.issn.1006-6616.2020.26.01.003
Citation: SUN Dongsheng, CHEN Qunce, ZHANG Yanqing, 2020. Analysis on the application prospect of ASR in-situ stress measurement method in underground mine. Journal of Geomechanics, 26 (1): 33-38. DOI: 10.12090/j.issn.1006-6616.2020.26.01.003

ASR法在井下矿山地应力测试中的应用前景分析

doi: 10.12090/j.issn.1006-6616.2020.26.01.003
基金项目: 

国家科技重大专项项目 2016ZX05034

详细信息
    作者简介:

    孙东生(1980-), 男, 博士, 高级工程师, 主要从事地应力测试理论与方法研究。E-mail:dongshengsun@189.cn

  • 中图分类号: P553

Analysis on the application prospect of ASR in-situ stress measurement method in underground mine

  • 摘要: 现今地应力状态是井下矿山建设、巷道稳定性分析和冲击地压(煤与瓦斯突出)预测等方面的重要基础数据。目前井下矿山地应力测试主要以空芯包体解除法为主,实践中发现空芯包体解除应力计安装过程中,易出现不能与孔壁完全黏贴的情况,导致测试成功率较低且劳动强度较大。文章介绍了一种基于定向岩芯卸荷后非(滞)弹性恢复变形测量的近原位地应力测试方法(简称ASR法),并通过与水压致裂地应力测试结果对比,验证了ASR地应力测试方法的有效性。ASR法的可重复性结果表明,同一测点ASR地应力测量结果平均差系数最大为6.29%,验证了ASR地应力测量方法的可靠性。预期ASR法以其安全、高效且不受测量深度和测试环境限制等优点,在井下矿山地应力测试中具有广阔的应用前景。

     

  • 图  1  岩芯表面应变计的布置

    Figure  1.  The layout of strain gauges on the surface of a rock core

    图  2  雪峰山先导孔ASR法和水压致裂法测试曲线

    a—1260 m样品ASR法测试曲线;b—1267 m水压致裂法井下压力计记录曲线

    Figure  2.  Test curves of the ASR and hydraulic fracturing methods at Xuefengshan pilot hole

    图  3  3620.9 m和3621.1 m深度样品的非弹性应变恢复曲线

    Figure  3.  The anelastic strain recovery curves of samples from 3620.9 m and 3621.1 m

    表  1  ASR法与水压致裂法地应力测量结果对比

    Table  1.   Comparison of in-situ measurement results from the ASR method and the hydraulic fracturing method

    岩芯编号 深度/m σH/MPa σh/MPa σv/MPa
    ASR法 1260.00 42.03 29.09 33.40
    水压致裂法 1267.00 50.79 32.52 33.58
    均值 1263.50 46.41 30.81 33.49
    注:σH-最大水平主应力;σh-最小水平主应力;σv-垂向应力;σv根据上覆岩层重量计算(岩石密度取2.65 g/cm3)。
    下载: 导出CSV

    表  2  ASR法地应力重复测量结果

    Table  2.   Repeated measurement results through the ASR method

    岩芯编号 深度/m σ1/MPa σ2/MPa σ3/MPa σH/MPa σh/MPa σv/MPa
    ASR1 3620.9 120.6 79.3 69.2 112.3 79.1 97.7
    ASR2 3621.1 126.4 89.0 78.5 117.2 78.9 97.8
    均值 2621.0 123.5 84.2 73.9 114.8 79 97.8
    平均差系数 2.35% 5.76% 6.29% 2.13% 0.13% 0.05%
    注:σ1-最大主应力;σ2-最大主应力;σ3-中间主应力;σH-最大水平主应力;σh-最小水平主应力;σv-垂向应力;σv根据上覆岩层重量计算(岩石密度取2.70 g/cm3)。平均差系数采用常用的统计学公式计算
    下载: 导出CSV
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出版历程
  • 收稿日期:  2019-09-11
  • 修回日期:  2019-12-25
  • 刊出日期:  2020-02-29

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