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| COMPARATIVE TEST RESEARCH ON THE SHEAR STRENGTH CHARACTERISTIC OF GANGUE |
| LI Dongsheng1，2，3，LIU Dongsheng3 |
| (1. College of Civil Engineering，Chongqing University，Chongqing 400045，China；2. Key Laboratory of New Technology for Construction of Cities in Mountain Area，Ministry of Education，Chongqing University，Chongqing 400045，China；3. Chongqing Institute of Geology and Mineral Resources Survey，Chongqing 400039，China) |
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Abstract In order to analysis the mechanical characteristic differences of coal gangue abandoned in different periods，based on the on-site gradation，the direct shear tests of consolidation coal gangue and fresh coal gangue with different moisture content are carried out. The test results indicate that different from the fresh gangue，the consolidation gangue has shown obvious bonding characteristic with the increase of moisture content. The stress-strain relationship also is gradually change into the strain hardening of high moisture content from the strain softening of low moisture content. The influence of dry density and moisture content of gangue specimen to the shear strength parameters is different to the consolidation coal gangue and to fresh coal gangue. The dry density has more significant effect to the consolidation gangue?s cohesive strength and the fresh gangue?s internal frictional angle. Compare with fresh coal gangue，the consolidation coal gangue is more sensitive to the moisture content of specimen. When the moisture content is close to saturation state，the internal friction angle of consolidation coal gangue is nearly zero and the shear strength is mainly provided by the internal cohesive force at this time. Meanwhile the reducing range of fresh coal gangue is less than 15%. The difference of shear strength characteristics is related to the fine particle composition in coal gangue. The test results in this paper can offer a basis for the stabilization calculation of coal gangue hill.
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| [1] 姜振泉，赵道辉，隋旺华，等. 煤矸石固结压密性与颗粒级配缺陷关系研究[J]. 中国矿业大学学报，1999，28(3)：212–216.(JIANG Zhenquan，ZHAO Daohui，SUI Wanghua，et al. Study on relationship between consolidation-compactness and size grade shortage of coal gangue[J]. Journal of China University of Mining and Technology，1999，28(3)：212–216.(in Chinese))
[2] 胡炳南，郭爱国. 矸石充填材料压缩仿真实验研究[J]. 煤炭学报，2009，34(8)：1 076–1 080.(HU Bingnan，GUO Aiguo. Testing study on coal waste back filling material compression simulation[J]. Journal of China Coal Society，2009，34(8)：1 076–1 080.(in Chinese))
[3] 徐俊明，张吉雄，黄艳利，等. 充填综采矸石–粉煤灰压实变形特性试验研究及应用[J]. 采矿与安全工程学报，2011，28(1)：158–162.(XU Junming，ZHANG Jixiong，HUANG Yanli，et al. Experimental research on the compress deformation characteristic of waste fly ash and its application in backfilling fully mechanized coal mining technology[J]. Journal of Mining and Safety Engineering，2011，28(1)：158–162.(in Chinese))
[4] 查剑锋，郭广礼，刘元旭，等. 矸石变形非线性及其对岩层移动的影响[J]. 煤炭学报，2009，34(8)：1 071–1 075.(ZHA Jianfeng，GUO Guangli，LIU Yuanxu，et al. The nonlinear features of waste deformation and its impaction on strata movement[J]. Journal of China Coal Society，2009，34(8)：1 071–1 075.(in Chinese))
[5] 钱 志，徐斗斗，郭广礼. 原生矸石连续级配压缩实验研究[J]. 煤炭工程，2012，(6)：100–106.(QIAN Zhi，XU Doudou，GUO Guangli. Research on continued gradation compression experiment of primary coal rejects[J]. Coal Engineering，2012，(6)：100–106.(in Chinese))
[6] 张德辉，李 辉. 连续级配矸石压缩性能的试验研究[J]. 辽宁工程技术大学学报：自然科学版，2011，30(3)：337–340.(ZHANG Dehui，LI Hui. Experimental study on compression performance of continuous grading gangue[J]. Journal of Liaoning Technical University：Natural Science，2011，30(3)：337–340.(in Chinese))
[7] 刘松玉，童立元，邱 钰，等. 煤矸石颗粒破碎及其对工程力学特性影响研究[J]. 岩土工程学报，2005，27(5)：505–510.(LIU Songyu，TONG Liyuan，QIU Yu，et al. Crushable effects on engineering mechanical properties of colliery wastes[J]. Chinese Journal of Geotechnical Engineering，2005，27(5)：505–510.(in Chinese))
[8] 刘松玉，邱 钰，童立元，等. 煤矸石的强度特征试验研究[J]. 岩石力学与工程学报，2006，25(1)：199–205.(LIU Songyu，QIU Yu，TONG Liyuan，et al. Experimental studyon strength properties of coal wastes[J]. Chinese Journal of Rock Mechanics and Engineering，2006，25(1)：199–205.(in Chinese))
[9] 李东升，刘东升，王渝昆. 煤矿区矸石山塑性极限可靠度分析[J]. 重庆大学学报，2008，31(12)：1 441–1 445.(LI Dongsheng，LIU Dongsheng，WANG Yukun. Plastic upper bound theory reliability analysis of coal gangue hills[J]. Journal of Chongqing University，2008，31(12)：1 441–1 445.(in Chinese))
[10] 李东升，刘东燕，蒲清平. 矸石散体塑性滑移的稳定性评价分析[J]. 重庆大学学报，2009，32(11)：1 334–1 338.(LI Dongsheng，LIU Dongyan，PU Qingping. Plastic slip stability analysis of gangue granular media[J]. Journal of Chongqing University，2009，32(11)： 1 334–1 338.(in Chinese))
[11] 董 倩，刘东燕. 矸石山坡体稳定性非线性极限分析上限法[J]. 煤炭学报，2007，32(2)：131–135.(DONG Qian，LIU Dongyan. Nonlinear plasticity limit analysis upper bound method of gangue hill stability[J]. Journal of China Coal Society，2007，32(2)：131–135.(in Chinese))
[12] 臧亚君，刘东燕，蒋克锋. 重庆山区矸石山降雨入渗特性及其稳定性研究[J]. 土木工程学报，2009，42(7)：85–89.(ZANG Yajun，LIU Dongyan，JIANG Kefeng. Characteristics of rainfall infiltration and stability of gangue hills in Chongqing mountainous area[J]. China Civil Engineering Journal，2009，42(7)：85–89.(in Chinese))
[13] 臧亚君，刘东燕，彭文轩，等. 重庆矿区矸石山体特性现场试验研究[J]. 岩土工程学院，2009，31(4)：558–563.(ZANG Yajun，LIU Dongyan，PENG Wenxuan，et al. Field tests on coal wastes in Chongqing[J]. Chinese Journal of Geotechnical Engineering，2009，31(4)：558–563.(in Chinese))
[14] 段 巍，张孟喜. 煤矸石推剪试验的颗粒离散元细观模拟[J]. 上海大学学报：自然科学版，2012，18(5)：531–538.(DUAN Wei，ZHANG Mengxi. Mesomechanical simulation of push-shear tests on coal waste with particle flow code[J]. Journal of Shanghai University：Natural Science，2012，18(5)：531–538.(in Chinese))
[15] 中华人民共和国行业标准编写组. DL/T 5356—2006 水利水电工程粗粒土试验规程[S]. 北京：中国电力出版社，2006.(The Professional Standards Compilation Group of People?s Republic of China. DL/T 5356—2006 Code for coarse-grained soil test for hydropower and water conservancy engineering[S]. Beijing：China Electric Power Press，2006.(in Chinese)) |
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2015, Vol. 34 
