Study On The Drilling And Slag Discharge Of Floor Small Aperture Anchorage Hole In Deep Roadway

In the process of drilling holes in the bottom of the roadway,the difficulty of the hole drilling is an important factor which restricts the efficiency of the hole.The drilling anchor hole is the necessary step to realize the bottom of the roadway anchor cable support.Thus,this problem needs to be solved.The paper Using the method of theoretical analysis,numerical simulation and laboratory experiments combined with the determination of the object of drilling slag of floor strata starting from the analysis,to study the structure of the floor strata and rock types,analyzed the composition of roadway floor rock firmness and drillability,and by means of numerical simulation of various types of drilling characters rock analysis.Through the analysis of roadway anchor hole drilling force and drill rock in the process of research on rock broken mechanism and particle size distribution;combined with the knowledge of fluid mechanics analysis of drilling slag particles flow characteristics in the discharge of solid-liquid two-phase anchoring holes in the process of calculating the drill slag particles was promoted in vertical pipe along the process of energy loss.The design of slag drill pipe model and numerical simulation method of cross-section size parameters of inlet channel and discharge channel optimization,analyzes the influent flow rate,pump pressure,anchor hole depth and drilling slag particle size of slag particles in drilling effect can be eliminated by external migration and anchorage hole discharge efficiency,determine the the optimal design and the corresponding slag slag pipe drilling construction conditions.