朝川二井煤巷层状顶板锚固孔钻进信号特征研究

Study on Signal Feature of Anchor Hole Drilling in Bedded Roof of Coal Roadways in Chaochuan No.2 Coal Mine

以朝川二井煤巷层状顶板主要岩层类型为对象进行实验室相似模拟试验研究,得到了顶板岩层在锚固孔钻进施工过程中的钻进信号特征。结果表明:阻塞区之前,在同一推力水平下,不同岩性钻进速度不同,泥岩最大,砂质泥岩次之,砂岩最小。

Aiming at the main rock stratum type-bedded roof of coal roadways in Chaochuan No.2 coal mine, laboratory simulation about signal feature of anchor hole drilling are carried out. The result indicated: ahead of the blocked-off region and with the same thrust force, there existed great difference in drilling velocity between different kinds of rock stratum, the highest velocity came from mudstone,the second is sandstone and the lowest is sandstone.