【摘要】 为研究夹矸-煤组合体结构破坏力学响应及冲击倾向性特征，针对不同夹矸厚度、位置的九组组合体结构开展单轴压缩试验，系统分析了抗压强度、弹性模量、峰前积聚能量、弹性能量指数、冲击能量指数的响应规律，进而提出一种评价含矸煤体冲击倾向性的新指标，并验证了该指标的有效性。研究发现：（1）组合体结构的抗压强度和峰前能量随夹矸厚度的增加而降低，弹性模量随之增加而增大；当夹矸位于下中部时，组合体结构的抗压强度与弹性模量最低，峰前能量最高。（2）夹矸向组合体结构中部变化，破坏形态由“破碎”完全破坏向“点式”不完全破坏逐渐过渡。随夹矸厚度的增加，破坏区域由整体到局部过渡，破坏程度也由完全到不完全转变。与“点式”不完全破坏相比，“破碎”完全破坏对应的K_crc值较大，且具有更强的冲击倾向性。（3）提出的评价夹矸-煤组合体冲击失稳指标K_crc，新指标与抗压强度Rc和冲击能量指数KE呈显著正相关性，进一步验证了K_crc在综合判定含矸煤体冲击倾向性中的合理性。将该指标应用于含矸石煤层的评价，比残余能量指标更能准确地反映其冲击倾向性，具有广泛的潜在应用价值和实际意义。更多还原

【Abstract】 To investigate the mechanical response during failure and the impact tendency characteristics of gangue-coal combined structure,uniaxial compression tests were conducted on nine groups of combined structures,each with varying gangue thicknesses and positions.The response patterns of compressive strength,elastic modulus,pre-peak accumulated energy,elastic energy index,and impact energy index were systematically analyzed.Furthermore,a new index for evaluating the impact tendency of gangue-containing coal was proposed,and its effectiveness was verified.The findings are as follows:（1） As the gangue thickness increases,both the compressive strength and the pre-peak energy of the combined structure decrease,whereas the elastic modulus increases accordingly.When the gangue is located in the lowermiddle position,the combined structure exhibits the lowest compressive strength and elastic modulus but the highest prepeak energy.（2） As the gangue shifts toward the middle position of the combined structure,the failure mode gradually transitions from complete "crushing" failure to an incomplete "point-type" failure.As gangue thickness further increases,the failure region evolves from overall failure to localized failure,with the degree of failure shifting from complete to incomplete.The K_crc value corresponding to "crushing" complete failure is higher and has a stronger impact tendency compared to "point-type" incomplete failure.（3） The proposed comprehensive impact instability evaluation index K_crc for the gangue-coal combined structure has shown a significant positive correlation with compressive strength（R_c） and impact energy index（K_E）, further verifying its rationality in comprehensively assessing the impact tendency of gangue-containing coal bodies.Applying this index to the evaluation of gangue-containing coal seams provides a more accurate reflection of their impact tendency compared with the residual energy index,which has a wide range of potential applications and practical significance.更多还原