大采深倾斜薄煤层底板采动破坏形态的连续探测

详细信息

CONTINUOUS EXPLORATION FOR THE MINING FAILURE FORM OF THE INCLINE AND THIN COAL SEAM'S FLOOR UNDER THE HIGH DEPTH

摘要: 利用多回路钻孔注(放)水连续探测系统,结合断裂力学分析,研究了大采深倾斜薄煤层底板采动破坏特征与形态,结果表明底板破坏形态为一匙形,与厚煤层开采所形成的破坏形态相比其破坏特征的差异在于,底板采动裂隙主要是原生节理裂隙的扩展,而工作面推过压实后,绝大部分裂隙又趋于闭合。
- 煤层 /
- 底板 /
- 破坏形态 /
- 连续测量
Abstract: In this paper, the mining failure feature and form of the incline and thin coal seam's floor is researched by using the test result of the continuous exploration system with multi pipeline in the borehole and the analyses of fracture mechanics.The result indicates that the floor's failure form likes a spoon.The difference between the failure feature of thin coal seam and the ones of thick coal seam is that the mining fractures in the floor are mainly the expansion of original joints and fractures, and the most fractures tend to close after the working face passed and the floor's rock strata are compacted.
- coal seam /
- floor /
- failure analysis /
- continuous measurement