Research On Fault Control Analysis Method And Application Of Perforation Equipment

Mining production equipment is necessary to ensure production capacity of mining enterprises.However, equipment malfunction inevitably exists in the equipment using process. According to the system safety theory, equipment malfunction state cannot be completely ruled out in the production process.We should focus on the control of the fault rate, so that the fault can be reduced to an acceptable level. The effectiveness of the equipment technology and management, namely, reliability, should be improved to reduce the equipment malfunction.In this paper, on the basis of the usage and maintenance records of a specific type of drilling equipment in open-pit mine, the influencing factors and improvement measures of the drilling equipment fault control have been analyzed qualitatively and quantitatively by the method of reliability analysis.The research contents include the statistical analysis of the characteristics of reliability of the drilling equipment, the model establishment of the reliability stochastic simulation, and the verification of the improved reliability index and so on. The main factors influencing the equipment available time are analyzed in accordance with the equipment reliability characteristic. The result of the validity changes caused by the changes of influence factors are analyzed by the stochastic simulation model experiment, which can be used to point out the main way to improve the rate of equipment utilization. The maintenance or replacement strategy of the important unit equipment is selected by the method of failure mode effects and criticality analysis (FMECA) and fault tree analysis (FTA).The fault rate of the equipment can be controlled within the acceptable range, which can improve the equipment production capacity. The results and works are given as follows.(1)The probability of the accomplished footage of KQ-200 rigs within the schedule time is normally distributed, while the probability of the running time, the maintenance time, the awaiting work time and the awaiting repair time is negatively exponentially distributed.(2) The reliability analysis of stochastic simulation model of the equipment is established respectively according to the characteristic of every rig, which has been verified.The simulation results can provide reference for enterprises to improve equipment usage and maintenance work.(3)The simulation results of the drilling equipment fault rate control strategy show that the comprehensive management measures for increasing the utilization ratio of equipment is the most effective.The rig’s annual working days can be increased by 5～9% respectively. The working efficiency of the every rig can be increased obviously by shortening the awaiting work time.(4) The fault type, cause and effect index of the KQ-200 rigs are achieved by FMECA and FTA. The highest harmfulness structure and the fault rate decided by the component failure rate of the down-the-hole drill are determined.(5) The analysis and prediction of the equipment fault events occurring in a stochastic way have been accomplished by the method of stochastic simulation and reliability analysis, which can be used to improve the mining equipment management and increase equipment production capacity effectively.