卸荷条件下含瓦斯煤力学特性试验研究

doi:10.13722/j.cnki.jrme.2014.s2.011

摘要
图/表
参考文献(13)
相关文章 (15)

全文: PDF (4707 KB) HTML (1 KB)
输出: BibTeX | EndNote (RIS)

摘要为分析煤矿井下瓦斯压力、地应力、开采强度及其耦合条件对含瓦斯煤力学特性及巷道围岩变形破坏规律的影响，采用含瓦斯煤热流固三轴伺服试验系统进行不同瓦斯压力、围压和卸围压速率组合条件下的卸围压试验。研究结果表明：(1) 瓦斯压力对煤体弹性模量影响显著，煤体弹性模量随瓦斯压力的增加而减小；(2) 围压对煤体弹性模量影响显著，煤体弹性模量随围压增加而增加；(3) 卸围压速率对煤体弹性模量影响显著，煤体弹性模量随卸围压速率的增加而减小；(4) 含瓦斯煤体发生变形破坏所需时间随瓦斯压力增加而减少、随围压增加而增加、随卸围压速率增加而减少。

	服务

	把本文推荐给朋友
	加入我的书架
	加入引用管理器
	E-mail Alert
	RSS
	作者相关文章
	徐佑林1
	2
	康红普1
	2
	张辉1
	2
	王维忠3

关键词 ：采矿工程, 含瓦斯煤, 卸围压, 力学特性, 试验研究

Abstract：Based on the triaxial stress thermal-hydro-mechanical coal containing gas system，unloading confining pressure experiments under different gas pressures and confining pressuresand speeds of unloading confining pressures，are carried out to study the influences of gas pressure，stress，speed of unloading confining pressure and their coupling conditions on the mechanical properties and the laws of roadway surrounding rock deformation and failure. The results show that：(1) The gas pressure has an obvious infulence on the coal elasticity modulus. The elasticity modulus decreases with the increase of gas pressure. (2) The confining pressure has an obvious infulence on the coal elasticity modulus. The elasticity modulus increases with the increase of confining pressure. (3) The speed of unloading confining pressure has an obvious infulence on the coal elasticity modulus. The elasticity modulus decreases with the increase of the speed of unloading confining pressure. (4) The time before deformation and failure increases with increase of confining pressure，decrease of gas pressure and the increase of speed of unloading confining pressure.

Key words： mining engineering containing gas coal unloading confining mechanical properties experimental research

引用本文:

徐佑林1，2，康红普1，2，张辉1，2，王维忠3. 卸荷条件下含瓦斯煤力学特性试验研究[J]. 岩石力学与工程学报, 2014, 33(S2): 3476-3488.
XU Youlin1，2，KANG Hongpu1，2，ZHANG Hui1，2，WANG Weizhong3. EXPERIMENTAL STUDY OF MECHANICAL PROPERTIES OF COAL CONTAINING GAS UNDER UNLOADING CONDITIONS. , 2014, 33(S2): 3476-3488.

链接本文:

https://rockmech.whrsm.ac.cn/CN/10.13722/j.cnki.jrme.2014.s2.011 或 https://rockmech.whrsm.ac.cn/CN/Y2014/V33/IS2/3476

[1] TIAN Q H，XU Z W，ZHOU G Q，et al. Coefficients of earth pressure at rest in thick and deep soils[J]. Mining Science and Technology，2009，19(2)：252–255.

[2] ZHOU X P，QIAN Q h，ZHANG Y X. The constitutive relation of crack-weakened rock masses under axial-dimensional unloading[J]. Acta Mechanica Solida Sinica，2008，21(3)：221–231.

[3] SUN J S，ZHU Q H，LU W B. Numerical simulation of rock burst incircular tunnels under unloading conditions[J]. Journal of China University of Mining and Technology，2007，17(4)：552–556.

[4] DAYAN W，WEI M，CHANG X X. Analyses of behavior of stress- strain of frozen Lanzhou loess subjected to K₀consolidation[J]. Cold Regions Science and Technology，2004，40(1/2)：19–29.

[5] LAU J S O，CHANDLER N A. Innovative laboratory testing[J]. International Journal of Rock Mechanics and Mining Sciences，2004，41(8)：1 427–1 445.

[6] XIE H Q，HE C H. Study of the unloading characteristics of a rockmass using the triaxial test and damage mechanics[J]. International Journal of Rock Mechanics and Mining Sciences，2004，41(Supp.1)：74–80.

[7] HUANG R Q，WANG X N，CHAN L S. Triaxial unloading test ofrocks and its implication for rock burst[J]. Bulletin of Engineering Geology and the Environment，2001，60(1)：37–41.

[8] SELLERS E J，KLERCK P. Modelling of the effect of discontinuitieson the extent of the fracture zone surrounding deep tunnels[J]. Tunnelling and Underground Space Technology，2000，15(4)：463–469.

[9] SALIH S，MACLEAN A，MIMOUNE K. Formation resistivity response to loading and unloading confining pressure[J]. Journal of Petroleum Science and Engineering，1996，16(1/3)：169–179.

[10] SHIMAMOTO T. Confining pressure reduction experiments：a new method for measuring frictional strength over a wide range of normal stress[J]. International Journal of Rock Mechanics and Mining Sciences and Geomechanics Abstracts，1985，22(4)：227–236.

[11] 苏承东，翟新献，李永明，等. 煤样三轴压缩下变形和强度分析[J].岩石力学与工程学报，2006，25(增1)：2 963–2 968.(SU Chengdong，ZHAI Xinxian，LI Yongming，et al. Study on deformation and strength of coal samples in triaxial compression[J]. Chinese Journal of Rock Mechanics and Engineering，2006，25(Supp.1)：2 963–2 968.(in Chinese))

[12] 尹光志，蒋长宝，王维忠，等. 不同卸围压速度对含瓦斯煤岩力学和瓦斯渗流特性影响试验研究[J]. 岩石力学与工程学报，2011，30(1)：68–77.(YIN Guangzhi，JIANG Changbao，WANG Weizhong，et al. Experimental study of influence of confining pressure unloading speed on mechanical properties and gas permeability of containing-gas coal rock[J]. Chinese Journal of Rock Mechanics and Engineering， 2011，30(1)：68–77.(in Chinese))

[13] 尹光志，王登科，张东明，等. 两种含瓦斯煤样变形特性与抗压强度的试验分析[J]. 岩石力学与工程学报，2009，28(2)：410–417.(YIN Guangzhi，WANG Dengke，ZHANG Dongming，et al. Test analysis of deformation characteristics and compressive strengths of two types of coal specimens containing gas[J]. Chinese Journal of Rock Mechanics and Engineering，2009，28(2)：410–417.(in Chinese))