Cutter head for microwave presplitting type hard-rock tunnel boring machine

A cutter head for a microwave presplitting type hard-rock tunnel boring machine, wherein the cutter head defines an outer circumference near an outer periphery thereof and an inner circumference near an axis thereof, a diameter of the outer circumference is greater than that of the inner circumference, a plurality of microwave transmitting ports are formed in a front surface of the cutter head, a wave-transparent protection plate is mounted at external-end holes of the microwave transmitting ports, internal-end holes of the microwave transmitting ports communicate with the cutter head, a plurality of microwave generating mechanisms are arranged in the cutter head, and the microwave generating mechanisms are the same in number as the microwave transmitting ports and are in one-to-one correspondence;

• the microwave generating mechanisms are distributed in the cutter head in one of two distribution manners, wherein a first distribution manner is as follows:
• the microwave generating mechanisms are uniformly arranged in the cutter head;
• a second distribution manner is as follows:
• the microwave generating mechanisms are the same in number as hobbing cutters on the cutter head and are arranged in one-to-one correspondence, one microwave generating mechanism and the microwave transmitting port corresponding to the microwave generating mechanism are arranged beside each hobbing cutter;
• and when the microwave generating mechanisms are distributed in the cutter head in the first distribution manner, all the microwave generating mechanisms have the same microwave radiation power, and the number of the microwave generating mechanisms on the outer circumference and the inner circumference of the cutter head is calculated according to the following formula:
• Q
• R
• L
• R
• =
• Q
• r
• L
• r
• N
• R
• ⁢
• PT
• θ
• ⁢
• ⁢
• R
• =
• N
• r
• ⁢
• PT
• θ
• ⁢
• ⁢
• r
• N
• R
• N
• r
• =
• R
• r
• wherein QR is a total microwave energy radiated by the microwave generating mechanisms on the outer circumference when the cutter head rotates by an angle of θ, Qr is a total microwave energy radiated by the microwave generating mechanisms on the inner circumference when the cutter head rotates by the angle of θ, LR is an arc length that the microwave generating mechanisms rotate on the outer circumference when the cutter head rotates by the angle of θ, Lr is an arc length that the microwave generating mechanisms rotate on the inner circumference when the cutter head rotates by the angle of θ, P is a microwave radiation power of each of the microwave generating mechanisms, T is a microwave radiation time of each of the microwave generating mechanisms, R is a radius of the outer circumference of the cutter head, r is a radius of the inner circumference of the cutter head, NR is the number of the microwave generating mechanisms on the outer circumference of the cutter head, Nr is the number of the microwave generating mechanisms on the inner circumference of the cutter head, and θ is a rotation angle of the cutter head.