摘要
采用RFPA2D对坚硬顶板、坚硬煤层、坚硬底板三体模型进行冲击倾向性数值试验研究。结果表明:坚硬顶板组合体峰值后突然失稳,易发生冲击地压;坚硬煤层组合体峰值前储存大量弹性能且瞬时释放,极易发生冲击地压;坚硬底板组合体峰后曲线呈现阶梯性缓慢下掉,不易发生冲击地压。组合体声发射能量释放分成3个阶段。坚硬顶板组合体和坚硬煤层组合体能量瞬时集中释放,坚硬底板组合体能量缓慢释放。虽然坚硬底板组合体释放总能量大于坚硬顶板组合体,但能量释放机制不同。
RFPA2Dis used to carry out numerical experimental study on three-body model rock burst tendency including hard roof and hard coal seam and hard floor.The study results showed that hard roof combination became suddenly instability after peak,which is prone to rock burst; hard coal seam combination stores a large number of elasticity and releases instantaneously before the peak,it is easy to happen rock burst; the curve of hard floor combination shows a ladder-like slow down trend after peak,that it is hard to appear rock burst.Acoustic emission energy release of combination is divided into three stages：energy instantaneous concentration release of hard roof combination and hard coal seam combination energy,slow release of hard floor combination energy.Though the total energy release of hard floor combination is greater than that of hard roof combination,but it is different in energy release mechanism.
出处
《煤矿安全》
CAS
北大核心
2016年第8期198-200,204,共4页
Safety in Coal Mines
基金
黑龙江省煤矿深部开采地压控制与瓦斯治理重点实验室开放课题资助项目(F2313-03)
国家自然科学基金资助项目(51574115
51374097)
黑龙江科技大学2015年硕士研究生创新科研资金资助项目(YJSCX2015-012HKD
YJSCX2015-109HKD)
关键词
冲击地压
煤岩组合体
冲击能量指数
声发射能量
数值试验
rock burst
coal and rock combination
rock burst energy index
acoustic emission energy
numerical experiment
