单轴压缩状态下煤岩组合结构破坏失稳的力学特性研究

由于煤岩组合材料强度以及组合倾角的不同，其力学性质会发生显著变化。为了探究

煤岩组合破坏失稳的力学特性，通过数值试验的方法，开展了单轴压缩试验。结果表明：煤岩组合结

构破坏失稳特征包含2种：一种是破碎失稳，主要表现为煤、岩体的破碎；另一种是滑移失稳，主要表

现为煤、岩体岩结构面的滑移。煤岩组合结构强度与组合中强度小的岩性有关，不受高强度岩性影

响；煤岩小角度接触面主要发生破碎失稳，大角度接触面主要发生滑移失稳。

Due to the difference of strength and dip angle，the mechanical properties of coal-rock

combination will change significantly. In order to explore the mechanical properties of coal-rock combina⁃

tion failure and instability，uniaxial compression test was carried out by numerical test method to analyze its

failure and instability characteristics.The results show that there are two kinds of failure and instability char⁃

acteristics of coal-rock composite structure : one is crushing instability，which is mainly manifested as the

crushing of coal and rock mass. The other is slip instability，which is mainly manifested in the slip of the

structural plane of coal and rock mass.The structural strength of coal-rock combination is related to the li⁃

thology with small strength in the combination，and is not affected by the lithology with high strength.The

small angle contact surface of coal rock mainly occurs crushing instability，and the large angle contact sur⁃

face mainly occurs sliding instability.

1. Shandong Tangkou Coal Co.，Ltd.; 2. School of Civil Engineering，Nanyang Institute of Technology;

3.College of Energy and Mining Engineering，Shandong University of Science and Technology

摘要：

由于煤岩组合材料强度以及组合倾角的不同，其力学性质会发生显著变化。为了探究

煤岩组合破坏失稳的力学特性，通过数值试验的方法，开展了单轴压缩试验。结果表明：煤岩组合结

构破坏失稳特征包含2种：一种是破碎失稳，主要表现为煤、岩体的破碎；另一种是滑移失稳，主要表

现为煤、岩体岩结构面的滑移。煤岩组合结构强度与组合中强度小的岩性有关，不受高强度岩性影

响；煤岩小角度接触面主要发生破碎失稳，大角度接触面主要发生滑移失稳。

Abstract: