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How to calculate the efficiency of the drilling rig?
Practices in many countries have shown that the high-speed drilling technology of rock drilling rigs is high, and the efficiency of people and the efficiency of shifts are also high. What is important is that several people have a few rock drill problems. The practice of Sweden, Canada and other countries with more developed mining industries shows that the three-machine flat trolley and the double-machine stop trolley operated by one person have the highest efficiency. At present, the development of drilling rigs in China is not ideal.
When drilling with a rock drilling rig, the efficiency of the person's class L can be determined as follows:
L=(KvTn/100)m/person class
N- wherein each simultaneously operate several rock drilling rock drill;
T-time per shift, min;
V-rock drill technology drilling speed, cm/min;
K-rock drill time utilization factor.
Where K is the ratio (%) of the time of the rock drill work (including the auxiliary work time) to the work time of the work shift. It is related to the structure of the boom, the stroke of the propeller, the physical and mechanical properties of the rock, the skill of the operating technique and the organization of the work. When the other conditions are the same, the relationship between the K value and the propulsion stroke is shown in Table 1 (f=10~14, hydraulic amplitude modulation boom, drilling speed v=20cm/min).
Table 1 Time utilization factor (K)
Propeller stroke (mm)
1000
1500
2000
2500
Time utilization factor, K
0.5
0.6
0.7
0.8
Increasing the time utilization of rock drills is critical. In particular, in the case of multiple working surfaces, in short, efforts must be made not only to improve the pure drilling speed and technical drilling speed, but also to improve the production organization and improve the utilization factor of the equipment.