Experimental study on reaming drilling rate and rock slag characteristics of raise-boring machine under different drilling parameters
SONG Zhaoyang
CUI Zesheng
LIU Zhiqiang
LI Shuchen
LIU Richeng
WAN Zeen
Abstract：The rock breaking drilling rate and rock slag characteristics of reaming bit under different drilling parameters were analyzed through field engineering test and indoor rock slag screening test of reaming drill under different drilling parameters.The results show that in sandstone formation with u-niaxial compressive strength of 41.6 MPa,the correlation between drilling parameters such as reaming weight,rotational speed,torque and drilling efficiency of inclined reverse drilling rig is obtained.In the test range,the reaming drilling rate increases with the increase of weight on bit.When the weight of bit is 14 MPa and the rotating speed is 9 r/min,the maximum reaming drilling rate is 1.41 m/h.Under the same rotating speed,the torque also increases with the increase of bit weight,and the torque is linearly positive correlated with the drilling rate.Through the analysis of rock slag screening,the proportion of rock slag in the range of 10.00～20.00 mm is relatively high.The rock slag formed by the reaming drill is divided into four categories:powder less than 0.50 mm,granular 0.50～＜5.00 mm,thin sheet 5.00～40.00 mm,and large slab or rib larger than 40.00 mm.The re-search results can provide theoretical support for rapid identification of reaming drilling effect of re-verse drilling rig and stability state of surrounding rock.
Keywords：raise-boring machinedrillingmechanical cuttingreaming drillingdrilling parametersrock slag
Publication Date：2024-06-25
Online Publishing Date：2025-08-15(First online date of this platform, not the publication date of the document)
Pages：7( 68-73,67 )