摘要
以某矿11503大采高工作面片帮冒顶事故为背景,通过理论分析和数值模拟,分析受背斜控制大采高工作面片帮冒顶机理。结果表明,大采高开采矿压显现剧烈,受地质因素影响工作面初次来压步距减小,煤体抗剪强度降低,初采阶段极易发生片帮冒顶。数值模拟结果与现场实测数据变化规律保持一致,验证了地质因素是诱发片帮冒顶事故的重要因素,并对大采高工作面片帮冒顶防治提出了针对性建议。
Taking the roof fall accident of No.11503 large mining height working face in a mine as the background,through theoretical analysis and numerical simulation,the mechanism of wall caving and roof falling in large mining height working face controlled by anticline is analyzed.The results show that under the influence of geological factors,the ground pressure behavior is intense in large mining height mining,the first weighting step distance of working face is decreased,the shear strength of coal body is reduced,and the wall caving and roof falling accident is easy to occur in the initial mining stage.The field measured data are consistent with numerical simulation result,which shows that the geological factors are the important factors to induce the wall caving and roof falling accident.At last,some suggestions are put forward for the prevention and control of wall caving and roof fall in large mining height working face.
作者
张佳佳
ZHANG Jia-jia(Jinsheng Yixin Coal Industry Co.,Ltd.,Shanxi Jincheng Anthracite Mining Group Co.,Ltd.,Jincheng 048000,China)
出处
《陕西煤炭》
2020年第6期96-99,112,共5页
Shaanxi Coal
关键词
背斜
大采高开采
片帮
冒顶
数值模拟
anticline
large mining height mining
wall caving
roof fall
numerical simulation
