• Chinese Core Periodicals
  • Chinese Core Journals of Science and Technology
  • RCCSE Chinese Authoritative Academic Journals
Email Alert RSS
Advanced Search
ZHANG Junjie. Study on the effect of moisture on mechanical properties and impact energy index of coal[J]. Safety in Coal Mines, 2023, 54(7): 26-33.
Citation: ZHANG Junjie. Study on the effect of moisture on mechanical properties and impact energy index of coal[J]. Safety in Coal Mines, 2023, 54(7): 26-33.
shu

Study on the effect of moisture on mechanical properties and impact energy index of coal

More Information
  • Available Online: August 30, 2023
    Graphical Abstract
    • Abstract
  • Coal destruction is an energy-driven destabilization phenomenon. In order to investigate the effect of moisture on energy accumulation and dissipation during coal destruction, uniaxial compression tests on coal samples with different water content states were carried out, and the mechanical properties and impact energy index of coal were analyzed based on this. The results showed that the uniaxial compressive strength and elastic modulus of coal samples decreased significantly with the increase of water content; the proportion of the initial compression-density stage, plastic deformation damage stage and post-peak damage stage in the full stress-strain process of coal samples increased, and the proportion of linear elastic stage decreased; the accumulation deformation energy before the peak of coal samples decreased, the loss deformation energy after the peak increased, and the impact energy index decreased. The increase of water content changed the coal sample from splitting damage to shear damage, and the particle size of crumbling pieces became larger, the number of pieces decreased, and the damage sound weakened during the damage. The uniaxial compressive strength, impact energy index and impact energy velocity index of coal samples in water-saturated condition decreased by 35.32%, 86.07% and 99.63%, respectively, compared with those in dry condition, and the coal seam water injection process can effectively reduce the impact propensity of coal seam.
    • FullText(HTML)
    • References (1)
  • ［15］　魏则宁，翟成，孙勇，等.液氮冷冲击时长对煤体致裂效果的影响［J］.中国矿业大学学报，2022，51（2）：273-282. WEI Zening, ZHAI Cheng, SUN Yong, et al. The influence of cold shock duration of liquid nitrogen on the fracturing effect of coal［J］. Journal of China University of Mining & Technology, 2022, 51（2）: 273-282. ［16］　靳涛，连清旺.裂隙角度对煤冲击倾向性的数值模拟研究［J］.煤炭技术，2022，41（5）：125-128. JIN Tao, LIAN Qingwang. Numerical simulation study on effect of fracture angle on coal impact tendency［J］.Coal Technology, 2022, 41（5）: 125-128. ［17］　杨科，刘文杰，马衍坤，等.煤岩组合体冲击动力学特征试验研究［J］.煤炭学报，2022，47（7）：2569-2581. YANG Ke, LIU Wenjie, MA Yankun, et al. Experimental research on dynamic characteristics of coal-rock combined specimen［J］. Journal of China Coal Society, 2022, 47（7）: 2569-2581. ［18］　卢卫永，刘琦，屈丽娜，等.单轴压缩条件下不同含水率煤体裂纹扩展及破坏模式研究［J］.工矿自动化，2022，48（8）：85-91. LU Weiyong, LIU Qi, QU Lina, et al. Study on coal crack propagation and failure mode with different moisture content underuniaxial compression［J］. Journal of Mine Automation, 2022, 48（8）: 85-91. ［19］　CHEN D, PAN Z, LIU J, et al. Modeling and simulation of moisture effect on gas storage and transport in coal seams［J］. Energy & Fuels, 2012, 26（3）: 1695-1706. ［20］　李波波，王忠晖，任崇鸿，等.水-力耦合下煤岩力学特性及损伤本构模型研究［J］.岩土力学，2021，42（2）：315-323. LI Bobo, WANG Zhonghui, REN Chonghong, et al. Mechanical properties and damage constitutive model of coal under the coupled hydro-mechanical effect［J］. Rock and Soil Mechanics, 2021, 42（2）: 315-323. ［21］　LYNCH L J, WEBSTER D S. Effect of thermal treatment on the interaction of brown coal and water: a nuclear magnetic resonance study［J］. Fuel, 1982, 61（3）: 271-275. ［22］　蒋长宝，段敏克，尹光志，等.不同含水状态下含瓦斯原煤加卸载试验研究［J］.煤炭学报，2016，41（9）：2230-2237. JIANG Changbao, DUAN Minke, YIN Guangzhi, et al. Loading-unloading experiments of coal containing gas under the condition of different moisture contents［J］. Journal of China Coal Society, 2016, 41（9）: 2230-2237. ［23］　潘一山，耿琳，李忠华.煤层冲击倾向性与危险性评价指标研究［J］.煤炭学报，2010，35（12）：1975-1978. PAN Yishan, GENG Ling, LI Zhonghua. Research on evaluation indices for impact tendency and danger of coal seam［J］. Journal of China Coal Society, 2010, 35（12）: 1975-1978. ［24］　丁鑫，肖晓春，吕祥锋，等.煤体破裂分形特征与声发射规律研究［J］.煤炭学报，2018，43（11）：3080-3087. DING Xin, XIAO Xiaochun, LV Xiangfeng, et al. Investigate on the fractal characteristics and acoustic emission of coal fracture［J］. Journal of China Coal Society, 2018, 43（11）: 3080-3087.Guanghui, OUYANG Zhenhua, QI Qingxin, et al. Experimental research on the influence of gas on coal burst tendency［J］. Journal of China Coal Society, 2017, 42（12）: 3159-3165. ［9］　张志镇，高峰，刘治军.温度影响下花岗岩冲击倾向及其微细观机制研究［J］.岩石力学与工程学报，2010， 29（8）：1591-1602. ZHANG Zhizhen, GAO Feng, LIU Zhijun. Research on rockburst proneness and its microcosmic mechanism of granite considering temperature effect［J］. Chinese Journal of Rock Mechanics and Engineering, 2010, 29（8）: 1591-1602. ［10］　王阳，王毅，赵耀江.低温处理煤岩结构演化及单轴力学特性研究［J］.煤矿安全，2021，52（9）：36-42. WANG Yang, WANG Yi, ZHAO Yaojiang. Research on structural evolution and uniaxial mechanical properties of coal and rock treated at low temperature［J］. Safety in Coal Mines, 2021, 52（9）: 36-42. ［11］　张琨，张森，任建喜，等.分级静动组合加载下裂隙煤岩破裂特性［J］.西安科技大学学报，2022，42（3）：546-554. ZHANG Kun, ZHANG Sen, REN Jianxi, et al. Fracture behaviors of prefabricated fractured coal rock under graded static-dynamic coupled loading［J］. Journal of Xi’an University of Science and Technology, 2022, 42（3）: 546-554． ［12］　茅献彪，陈占清，徐思朋，等．煤层冲击倾向性与含水率关系的试验研究［Ｊ］．岩石力学与工程学报，２００１， ２０（１）：４９－５２． MAO Xianbiao, CHEN Zhanqing, XU Sipeng, et al. Experimental study on the relation between the burst tendency and water content in coal seam［J］. Chinese Journal of Rock Mechanics and Engineering, 2001, 20（1）: 49-52. ［13］　孔海陵，王路珍.含瓦斯煤的基本力学性质试验研究［J］.煤炭技术，2013，32（1）：84-85. KONG Hailing, WANG Luzhen. Study of basic mechanical properties for gassy coal［J］. Coal Technology, 2013, 32（1）: 84-85. ［14］　丛钰洲，翟成，余旭，等.液氮冷冲击煤的作用范围及力学损伤机理［J］.煤炭学报，2023，48（6）：2484-2497.
    • Related Articles

  • Related Articles

    [1]PENG Shoujian, YANG Yan, XU Jiang, XU Qingfeng, QIN Chaolong, NONG Xiaoli. Experimental study on impact failure characteristics of deep circular roadway[J]. Safety in Coal Mines, 2025, 56(1): 107-116. DOI: 10.13347/j.cnki.mkaq.20240015
    [2]WANG Hao, ZHAO Yaojiang, SUN Xiaoyuan. The influence of liquid nitrogen leaching time on raw coal mechanics and failure mode[J]. Safety in Coal Mines, 2024, 55(8): 25-30. DOI: 10.13347/j.cnki.mkaq.220231149
    [3]LI Zhiqiang. Experimental study on impact tendency characteristics of coal under unloading and gas action[J]. Safety in Coal Mines, 2024, 55(4): 55-65. DOI: 10.13347/j.cnki.mkaq.20230978
    [4]WANG Zhenyu, YUE Gaowei, LIN Haixiao, LI Minmin. Analysis of damage and failure characteristics of coal under uniaxial impact loading[J]. Safety in Coal Mines, 2024, 55(2): 10-18. DOI: 10.13347/j.cnki.mkaq.20221784
    [5]FAN Guowei, SUN Zhuang, SHANG Junning. Effect of loading mode and impact velocity on crack propagation of coal[J]. Safety in Coal Mines, 2021, 52(4): 45-51.
    [6]DENG Zhigang, WANG Hongwei, JIANG Junjun, MO Yunlong, SUN Zhongxue, SU Zhenguo, LIU Bo. Study on Relationship Between P-wave Velocity and Stress of Coal Rocks with Different Impact Tendency[J]. Safety in Coal Mines, 2020, 51(11): 24-28.
    [7]ZHOU Le, WU Zhang, DU Fei. Study on Deformation of Micropile Tip Under Different Reinforcement Forms[J]. Safety in Coal Mines, 2017, 48(12): 211-214.
    [8]XIA Hongman, WANG Jiong, CUI Jiasen, ZHANG Yilong, WANG Bing, SONG Jingli. Experiment Study on Burst Tendency of 7# Coal Seam and Roof in Hongyang Coal Mine[J]. Safety in Coal Mines, 2015, 46(5): 50-53,57.
    [9]JIA Yanwu. Study on Index Weighting Coefficients of Bump Tendency and Bump Hazard of Coal Body[J]. Safety in Coal Mines, 2015, 46(4): 47-49.
    [10]GAO Yun, WANG En-yuan, ZHAO En-lai, SUN Zhen-yu. Study on the Indicator Correlation of Coal and Rock Burst Tendency[J]. Safety in Coal Mines, 2013, 44(8): 33-35.

Catalog

    Get Citation
    PDF
    XML
    Article views (22) PDF downloads (14) Cited by()
    Turn off MathJax
    Article Contents
    Abstract
    References
    Related Articles
    Links

    辽公网安备 21049802000106号　辽ICP备11020636号-9

    Website Copyright © CCTEG Shenyang Research Institute

    Address：No. 11 Binhe Road, Fushun Economic Development Zone, Liaoning　Postal Code：113122

    Tel：024-56616988/56616881　Email：mkaq@163.com

    Supported by: Beijing Renhe Information Technology Co., Ltd.  Baidu Analytics

    /

    DownLoad:  Full-Size Img  PowerPoint
    Return
    Return