摘要
为了揭示坚硬砾岩顶板断裂的应力演化及能量转化规律,根据2334综采工作面工程条件,运用离散元程序UDEC对不同厚度条件下的坚硬顶板开采活动进行模拟。结果表明,随着基本顶厚度的增加,工作面初次来压步距、周期来压步距均随之增加;通过增加基本顶断裂运动过程的能量消耗、降低外部载荷对基本顶的能量输入效率、降低自身的重力势能等措施可以降低基本顶断裂时能量的释放。
According to engineering conditions of 2334 fully mechanized coal face,using the software UDEC to simulate the hard roof mining activities under different thickness,the regularity of stress evolution and energy conversion when the hard conglomerate roof fractured revealing for revealing The results show that,with the increasing of main roof thickness,the first weighting interval and the periodic weighting interval are raising too.The main roof fracture energy was reduced by the measures of increasing the energy consumption in the process of fracturing,decreasing energy input efficiency from external load to the main roof and lessening main roof gravitation energy.
出处
《煤矿安全》
CAS
北大核心
2012年第4期150-153,共4页
Safety in Coal Mines
基金
国际科技合作项目(2008DFB70100)
煤炭资源与安全开采国家重点实验室自主研究项目(SKLCRSM09X01)
中央高校基本科研业务费专项资金资助项目(2010QNB01)
关键词
坚硬顶板
断裂
应力演化
能量转化
数值模拟
hard roof
fracture
stress evolution
energy conversion
numerical simulation
