TY -的A2 Sarhosis Vassilis AU - Chen Shaojie盟——通用电气,姚明AU -阴,大为AU -杨,Huisan PY - 2019 DA - 2019/11/28 TI - Rock-Coal的单轴失效行为的实验研究与预先存在的裂纹复合样品煤SP - 8397598六世- 2019 AB -煤炭开采过程中遇到许多危险的不稳定和失败可能是由于复合结构的煤层和围岩地层。缺陷存在于煤的结构稳定性影响复合结构。在这项研究中,单轴压缩试验是sandstone-coal复合样品进行的预先存在的裂纹在煤炭、结合测试执行与声发射(AE)设备和数码摄像机。力量,macrofailure起始(MFI),和失败复合样品的特点,影响煤的预先存在的裂纹,进行分析。煤的预先存在的裂纹是降低强度,促进小额信贷机构的出现,影响样本的故障特征。垂直渗透裂缝有更明显的影响强度和MFI发生,特别是垂直渗透裂缝渗透通过煤的中心。水平裂缝渗透率大幅减少的影响强度和MFI发生。MFI造成应力-应变曲线的形状一步伴随着能源指数峰值信号和发生在原始煤裂缝。MFI模型主要展出从预先存在的裂纹萌生煤炭裂缝和表面剥落裂纹扩展所致。完整的复合试样失败作为一个瞬时故障,而包含预先存在的裂纹的复合样品显示进步的失败。 The failures of composite samples occurred predominantly within the coal and displayed an X-typed shear failure accompanied by a small splitting failure. Both the coal and sandstone were destroyed in the composite sample with vertical penetration cracks through the centre of the coal. Failure of the coal occurred through a splitting failure accompanied by a small X-typed shear failure, while the sandstone showed a splitting failure induced by crack propagation in the coal. SN - 1687-8086 UR - https://doi.org/10.1155/2019/8397598 DO - 10.1155/2019/8397598 JF - Advances in Civil Engineering PB - Hindawi KW - ER -