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1.绪言 在深部盘区超前推进工作面时,为了防止发生冲击地压和瓦斯突出,通常是采用卸压钻孔的方法。本文所要介绍的内容便是根据打卸压钻孔时的排粉量、地响次数和AE波(声发射波)来推断矿压分布状况的。众所周知,在打卸压钻孔时,当钻头钻到高地压带,一般来说地响次数和排粉量都会同时增加,并且还会发生卡钻现象,于是引起钻孔的负载转矩和钻进速度发生变化。因此,本研究的目的就是探讨在现场打卸压钻孔时能否利用连续测得的钻机负载转矩和钻进速度来推断煤层内的矿压分布情况。本文拟介绍在打煤层钻孔时利用转矩测层的结果,以及从理论上来探讨作用在钻机上的几种转矩。
1. INTRODUCTION In the deep plate advance advancing face, in order to prevent the impact of pressure and gas outbursts, usually the use of pressure relief drilling method. This article is to be introduced is based on pressure relief drilling pressure when the discharge volume, the number of ring and AE wave (AE) to infer the distribution of rock pressure. It is well-known that when drilling a drill bit to a high pressure belt, it is known that both the number of ringing and the amount of discharged powder increase at the same time, and the phenomenon of stuck pipe may also occur. Therefore, the load torque and the drill The speed of change has changed. Therefore, the purpose of this study is to explore whether the pressure distribution in the coal seam can be deduced by using the continuous measured load torque and drilling speed of drilling rig when drilling and unloading pressure on site. This article describes the results of using torque tomography to drill holes in coal seams, as well as the theoretical analysis of several torques acting on the rig.