Development and application of drilling measurement system under impulse spin action
The properties of hard rock tunnel rock mass are crucial for the design of blasting parameters,and the rapid acquisition of rock mechanics parameters is essential for tunnel excavation efficiency.Drill parameters are closely related to rock properties.In-drill measurement systems are important tools for monitoring drilling parameters during the drilling process.Through in-drill monitoring systems,real-time engineering parameters such as drilling pressure,rotation speed,and drilling speed can be obtained,al-lowing for the analysis of actual rock mass properties.This analysis serves as a reference for blasting pa-rameter design and optimization.To rapidly and accurately obtain hard rock mechanics parameters,this study,based on rotary-percussive drilling machines,developed an intelligent in-drill measurement system with impact functionality.This system primarily consisted of an intelligent drilling control system and an intelligent sensing system.It enabled intelligent control and real-time monitoring of various in-drill parameters,including drilling speed,bit rotation speed,thrust pressure,rotation pressure,and im-pact pressure.Using this system,the experiments were conducted on high-strength rock samples of dif-ferent grades under various drilling parameter conditions.The study analyzed the responsiveness of the drilling tools and the interrelationships among various drilling parameters.The experimental results dem-onstrated that the rotary-percussive intelligent in-drill measurement system exhibited stable control per-formance,and the monitoring data from the intelligent sensing system were valid and reliable.There was a significant regularity in the response relationship between in-drill parameters and rock properties.A-mong different strength rocks,drilling speed exhibited the most noticeable response,showing a negative correlation with specimen strength.This proved that the system effectively identified different strength rocks and quantitatively evaluated rock mechanics parameters.The research results provided a new meth-od for real-time acquisition of in-situ rock mechanics parameters in engineering.
percussive rotary drillingmeasurement while drillingsystem developmentrock mass pa-rametershard-rock tunnel
万方数据
维普
