The limitation on the missing number of coal cutter picks is a crucial issue concerning coal mining efficiency and safety. First, we need to understand the basic function of coal cutter picks and their importance in the coal mining process.

The picks of a coal cutter are tools used to cut coal seams, and their quantity directly affects the efficiency and quality of coal mining. In normal coal mining operations, the shortage of picks must not exceed the specified upper limit, which is usually determined by the equipment manufacturer based on the equipment design and performance parameters. The specific quantity limit needs to be determined according to the specific equipment Model and usage environment.

Generally speaking, the shortage of picks should not exceed 10%-20% of the number required for normal operation of the equipment, so as to ensure the normal operation of the coal cutter and the efficiency of coal mining. If the number of missing picks is excessive, it may lead to the following problems:

1. Reduced coal mining efficiency: Picks are the direct tools for coal mining. Insufficient quantity will affect the cutting speed and quality, reducing overall mining efficiency.

2. Increased machine load: Insufficient number of picks may cause the machine to bear a greater load during cutting, increasing equipment wear and tear and the risk of failure.

3. Safety risks: If the number of picks is seriously insufficient, it may cause abnormal operation of the machine during mining, thus increasing safety risks.

Therefore, it is very important for coal cutters to maintain an appropriate number of picks. In actual operation, operators should regularly inspect and maintain the equipment to ensure that the number and condition of the picks meet the regulations. If missing or damaged picks are found, they should be replaced and replenished in time.

In addition, different coal cutters and different working environments may require different pick quantity configurations. Therefore, when determining the specific limit of the number of picks, the actual situation and the manufacturer's recommendations should be considered.

In summary, to ensure the efficiency and safety of coal mining, the missing number of coal cutter picks must not exceed the specified upper limit. This upper limit should be determined according to the specific equipment Model and usage environment, and should be adjusted according to the actual situation. In actual operation, operators should closely monitor the condition of the picks to ensure the normal operation of the equipment.