Method for quantitatively speculating heading machine cutter face void ratio

The invention provides a method for quantitatively speculating a heading machine cutter face void ratio, relates to a heading machine equipment design and intelligent construction technology, and belongs to the technical field of underground engineering. The method comprises the five steps of constructing a cutter distribution function, constructing a face rugged function, performing function translation, calculating the number of void cutters, calculating the void ratio and performing application. Starting from actually measured data, a general change rule of the void ratio is obtained through field element function abstraction, a large amount of random tests and statistical analysis, and an application way of a void ratio calculation result in cutter head model selection design is proposed in combination with engineering experience. By using the technical scheme, the real stress conditions of the cutters and the cutter head can be better speculated; and the cutter utilization rate is increased, key load par