古城煤矿原岩应力测试分析及与岩爆关联性研究

Study on Test Analysis and Rock Burst Correlation of In-Situ Rock Stress in Gucheng Mine

为分析古城煤矿32采区围岩岩爆现象频繁发生的原因,采用应力解除法,对采区原岩应力进行测量,得到该采区原岩应力场的分布特点,分析研究原岩应力与岩爆现象频发的关联性。结果表明:古城煤矿32采区原岩应力场中,水平应力占优势地位,并且巷道水平应力方向性显著,最大水平主应力与工作面巷道走向夹角为55°左右,在掘进方向右侧产生应力集中,这是导致岩爆现象频发的一个重要原因。

In order to analyze the frequent occurrence cause of the rock burst phenomenon in No.32 Mining Block of Gucheng Mine,a stress released method was applied to measure the in-situ rock stress of the mining block.The distribution features of the in-situ rock stress field in the mining block were obtained and the correlation between the in-situ rock stress and the rock burst phenomenon frequent occurrence was analyzed and studied.The results showed that in the in-situ rock stress field of No.32 mining block in Gucheng Mine,the horizontal stress was in a dominant position and the horizontal stress orientation of the mine roadway was obvious.The max horizontal principal stress had an included angle of 55 oto the gateway strike of the coal mining face.In the heading orientation,the stress concentration would be occurred at the right side and was the important cause would cause the rock burst phenomenon frequently occurred.