力学与实践 ›› 2020, Vol. 42 ›› Issue (4): 435-441.DOI: 10.6052/1000-0879-20-101

• 应用研究 • 上一篇    下一篇

含瓦斯煤体的冲击力学特性研究1)

杨丹*,2), 刘洋   

  1. * 大同煤炭职业技术学院,山西大同 037000;
    † 中煤能源研究院有限责任公司,西安 710054
  • 收稿日期:2020-03-16 出版日期:2020-08-20 发布日期:2020-08-25
  • 通讯作者: 2)杨丹,讲师,研究方向为煤矿安全的教学及科研。E-mail: 846227709@qq.com
  • 基金资助:
    1)山西省教育科学"十三五''规划"1331工程''研究专项课题(ZX18155)资助项目

THE IMPACT MECHANICAL PROPERTIES OF COAL CONTAINING GAS1)

YANG Dan*,2), LIU Yang   

  1. * Datong Vocational and Technical College of Coal, Datong 037000, Shanxi, China;
    † China Coal Energy Research Institute Co., Ltd, Xi'an 710054, China
  • Received:2020-03-16 Online:2020-08-20 Published:2020-08-25

摘要: 为得出含瓦斯煤体的冲击力学特性,采用类单轴压缩试验方法,对吸附瓦斯压力在0 MPa, 2 MPa, 4 MPa, 6 MPa等情况下的煤样力学特性进行了研究。研究得出:随着吸附瓦斯压力的增大,煤样的抗压强度、弹性模量、冲击能指数均近似线性降低,峰值应变近似线性增大。随着吸附瓦斯压力的增大,煤体的破坏类型由脆性向延性破坏转变,破坏的分选性增强。吸附瓦斯的作用加速了煤体失稳破坏的进程,并使煤岩瓦斯动力灾害类型呈现由冲击地压主导型向煤与瓦斯突出主导型转变的趋势。

关键词: 吸附瓦斯, 瓦斯压力, 冲击力学, 破坏特征

Abstract: In order to obtain the impact mechanical properties of coal containing gas, the mechanical properties of coal samples with adsorption gas pressures of 0 MPa, 2 MPa, 4 MPa and 6 MPa are determined by the uniaxial compression test method. The results show that the compressive strength, the elastic modulus and the impact energy index of coal samples decrease linearly and the peak strain increases linearly with the increase of the adsorbed gas pressure. With the increase of the adsorbed gas pressure, the failure type of the coal body changes from brittleness to ductility, and the portion of the separation failure portion is enhanced. The adsorbed gas accelerates the process of instability and failure of the coal body, and makes the coal and rock gas dynamic disaster change from the rock burst dominated type to the coal and gas outburst dominated type.

Key words: adsorption gas, gas pressure, impact mechanics, failure characteristics

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