National Key Lab for Deep Geomechanics and Underground Engineering,China University of Mining and Technology
(Beiing) School of Mechanics and Civil Engineering,China University of Mining and Technology (Beiing)

基于动载诱发冲击地压是静载和动载共同作用所致,推导了静载和动载共同作用条件下圆形巷道围岩应力的计算公式,并采用对带孔石膏模型试件施加动静复合荷载,模拟了动载诱发冲击地压过程,通过图像采集系统实时拍摄动载诱发冲击地压过程现象,通过数据采集系统实时采集孔口附近应力数据。试验发现,动载诱发冲击地压经历了裂纹产生、裂纹扩展、碎屑剥落和巷道大面积破坏4个阶段。通过试验和计算结果对比发现,孔口附近应力试验实测值与理论计算值一致,表明该计算方法可以用于现场动载诱发冲击地压巷道围岩应力的估算,进而为现场防冲支护设计提供理论依据。

Based on a mine pressure bump occurred by the dynamic load would be the static load and dynamic load joint role,a calculation formula of the surrounding rock stress in a circular roadway under the static load and dynamic load joint role was derived. A dynamic and static complex load was conducted on the gypsum model wit h boreholes. A mine pressure bump process occurred by the dynamic load was simulated. An image collection system was applied to real time shoot the mine pressure bu mp process phenomenon caused by the dynamic load and the data collection system was applied to real time collect stress data near borehole mouth. The test showed tha t the mine pressure bump occurred by the dynamic load would pass four stages of the cracking produced,cracking expansion,utting spalling and large area failure of the「 oadway. The comparison between the test and calculation results showed that the real measured value of the stress test at the borehole mouth was the same to the theoret ical calculation. Thus the calculation method could be applied to the estimation of the surrounding rock stress of the gateway with mine pressure bump and could provide th e theoretical basis to the site pressure bump prevention support design.

国家自然科学基金资助项目(51404278)；中央高校基本科研业务费专项资金资助项目(2015QB01)；北京市共建专项资助项目(80044810)；