煤体冲击倾向性指标与煤体破裂电荷关系试验研究  

Experimental study on relationship between coal bodies burst tendency index and charge of coal bodies fracture

作　　者：王岗[1] 潘一山[1] 肖晓春[1] 吴迪[1] 丁鑫[1] 赵鑫[1] 

机构地区：[1]辽宁工程技术大学力学与工程学院,辽宁阜新123000

出　　处：《中国安全科学学报》2016年第10期139-144,共6页China Safety Science Journal

基　　金：国家自然科学基金面上项目资助(11172121;51374123)

摘　　要：为完善冲击地压灾害的预测判据,在单轴压缩条件下,通过试验研究煤体冲击倾向性指标K与煤体破裂产生的电荷之间的关系。结果表明,随着应力峰后电荷脉冲数减少或累积电荷量减少,K值增大,煤样冲击倾向性增强;随着应力峰后电荷变化率增大,K值增大;煤样K值越大表示相应工程地质煤岩体的临界塑性区深度与临界荷载越小,冲击地压发生的可能性越大;因此,可将应力峰后电荷特征相关参数作为煤体冲击倾向性强弱及冲击地压发生难易程度的初步判定依据。In order to improve the prediction criterion of rock burst, experiments were carried out to study the relationship between burst tendency index K and charge during the failure process of coal bodies. The results showed that with the decrease in charge pulse number or accumulated charge after the stress peak, K value increases and burst tendency of specimens was enhanced, that with the increase in charge rate after the stress peak, K value increases, and that the greater K value of coal bodies, the lower the critical depth of softening zone and the critical load of the corresponding engineering geological coal rock mass are, and the easier occurrence of rock burst is. Given the above, the related parameters of charge characteristics behind the stress peak can be taken as a preliminary basis for judging burst tendency of coal bodies and the tendency for occurrence of rock burst.

关 键 词：冲击地压 煤体 冲击倾向性指标K 电荷信号 量化分析 

分 类 号：X936[环境科学与工程—安全科学]