CHEN Kai, JIANG Zhenquan, SUN Qiang. Experiment on mechanical behavior of interface between sand and clay[J]. COAL GEOLOGY & EXPLORATION, 2012, 40(4): 56-59. DOI: 10.3969/j.issn.1001-1986.2012.04.013
Citation: CHEN Kai, JIANG Zhenquan, SUN Qiang. Experiment on mechanical behavior of interface between sand and clay[J]. COAL GEOLOGY & EXPLORATION, 2012, 40(4): 56-59. DOI: 10.3969/j.issn.1001-1986.2012.04.013

Experiment on mechanical behavior of interface between sand and clay

More Information
  • Received Date: November 01, 2011
  • Available Online: October 26, 2021
  • The mechanical behaviors of the interface between sands and clay are investigated through direct shear tests on the conditions of sands with different particle size and different moisture contents by a DSJ-2 electric quadruple iso-strain direct shear apparatus. The results indicate that normal stress, particle size and moisture content of sand have important influence on shear strength. As shear stress reaches peak value in scheme 1 and 2, shear strength and shear displacement increase with normal stress increase. Whenσn=100 kPa, τ-δcurve of the interface in scheme 1 shows strain softening phenomenon. The shear strength of the interface of scheme 1 reduces along with the reduction of sand size. When σn=100 kPa, in scheme 2, shear strength of interface decreases with the increase of higher water content of sand, but whenσn>100 kPa, it decreases first and then increases with the increase of water content of sand. Under low normal stress in scheme 2, the sensitive interval of water content corresponding to shear strength of the interface is[10%,15], and more obvious.
  • Related Articles

    [1]OUYANG Zhenhua, LIU Yang, LI Chunlei, SHI Qingwen, LI Wenshuai, YI Haiyang, QIN Hongyan, ZHANG Ningbo. An experimental study of the evolutionary patterns of mechanical properties of coals under multiple mining disturbances[J]. COAL GEOLOGY & EXPLORATION, 2024, 52(10): 72-84. DOI: 10.12363/issn.1001-1986.24.04.0274
    [2]MI Honggang, WU Jian, PENG Wenchun, XU Lifu, LI Yong. Mechanical characteristics and fracture propagation mechanism of deep coal reservoirs in the Shenfu block[J]. COAL GEOLOGY & EXPLORATION, 2024, 52(8): 32-43. DOI: 10.12363/issn.1001-1986.24.03.0167
    [3]MI Honggang, WU Jian, PENG Wenchun, XU Lifu, LI Yong. Research on numerical simulation method of hydraulic fracturing for deep coal seam in Shenfu block based on mechanical property and in-situ stress[J]. COAL GEOLOGY & EXPLORATION.
    [4]XUE Shouning, HE Zhiqiang, LI Cong, YU Bo, LU Xuelian, LIU Wenyue, YANG Jianping, WEI Zijie. Physical and mechanical properties of thermal insulation materials for in-situ temperature-preserved coring of deep rocks[J]. COAL GEOLOGY & EXPLORATION, 2023, 51(8): 30-38. DOI: 10.12363/issn.1001-1986.22.12.0938
    [5]DUAN Yin, RONG Chuanxin, CAI Haibing, LONG Wei. Experimental research on mechanical properties of “jacked pipe-frozen soil” composite structure in freeze-sealing pipe roof tunnel[J]. COAL GEOLOGY & EXPLORATION, 2022, 50(12): 159-169. DOI: 10.12363/issn.1001-1986.22.04.0252
    [6]ZHANG Yin, LI Zhe, SONG Shikang, ZHAO Yi, LI Hao. Mechanical properties and acoustic emission characteristics of sandstone under natural and saturated conditions[J]. COAL GEOLOGY & EXPLORATION, 2022, 50(2): 98-105. DOI: 10.12363/issn.1001-1986.21.06.0341
    [7]ZHANG Youzhen, ZHANG Ning, ZHANG Xianzhen. Mechanical characteristics and test of rotary drilling of PDC anchor bit[J]. COAL GEOLOGY & EXPLORATION, 2019, 47(2): 207-211,216. DOI: 10.3969/j.issn.1001-1986.2019.02.032
    [8]DUAN Pinjia, WANG Zhiyin. Experimental investigation on mechanics properties and failure of coal in Hancheng[J]. COAL GEOLOGY & EXPLORATION, 2012, 40(4): 39-42. DOI: 10.3969/j.issn.1001-1986.2012.04.009
    [9]CHEN Xinnian, XI Jiami, ZHANG Kun. Mechanical properties of anchor bolt (cable) action and yield experiment[J]. COAL GEOLOGY & EXPLORATION, 2011, 39(6): 45-47,53. DOI: 10.3969/j.issn.1001-1986.2011.06.011
    [10]DING Shu-li, PENG Su-ping, LIU Qin-fu, XU Hong-liang. Effect of mechanical grinding on thermal behavior of kaolinite in coal-bearing strata,Pinglu County[J]. COAL GEOLOGY & EXPLORATION, 2002, 30(6): 15-18.

Catalog

    Article Metrics

    Article views (43) PDF downloads (2) Cited by()
    Related

    /

    DownLoad:  Full-Size Img  PowerPoint
    Return
    Return