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动载荷作用下构造煤体动力响应特性研究
36 9 Vol.36 No.9
2015 9 Rock and Soil Mechanics Sep. 2015
DOI 1016285/j.rsm.2015.09.012
100083
TU 435 A (2015) 09 2523 09
Dynamic response characteristics of tectonic coal under dynamic loading
LI Feng, ZHANG Ya-guang, LIU Jian-rong, LIU Dan-long
(Faculty of Resources and Safety Engineering, China University of Mining and Technology (Beijing), Beijing 100083, China)
Abstract: Based on the theory of stress wave propagation and interaction, the propagation process and damage mechanism of coal are
studied when stress wave propagates through the coal comprising plastic coal, elastic coal, tectonic coal and initial coal in front of the
tunneling. Furthermore, the dynamic response of tectonic coal is revealed. The results show that the main tensile stresses distribute
centrally in coal regions, where the wave impedance changes under dynamic loading. It is also found that the maximum tensile stress
is around the interface of plastic and elastic coal. In addition, the occurrence of tensile stress is closely related to the unloading wave,
which result in the tensile-shear failure of coal in combination with the effect of in-situ stress. It is clearly shown that the carrying
capability of tectonic coal to dynamic loading is weak. Due to the existence of tectonic coa
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