US 12,031,437 B2
Hard rock tunnel boring machine combining microwave heating with high pressure water cutting for assisting in rock breaking
Gaoming Lu, Henan (CN); Kairong Hong, Henan (CN); Dongjiang Pan, Henan (CN); Jianjun Zhou, Henan (CN); Limeng Zhang, Henan (CN); and Yandong Yang, Henan (CN)
Assigned to STATE KEY LABORATORY OF SHIELD MACHINE AND BORING TECHNOLOGY, Henan (CN); and CHINA RAILWAY TUNNEL GROUP CO., LTD., Guangdong (CN)
Appl. No. 17/781,522
Filed by STATE KEY LABORATORY OF SHIELD MACHINE AND BORING TECHNOLOGY, Henan (CN); and CHINA RAILWAY TUNNEL GROUP CO., LTD., Guangdong (CN)
PCT Filed Jun. 10, 2021, PCT No. PCT/CN2021/099270
§ 371(c)(1), (2) Date Jun. 1, 2022,
PCT Pub. No. WO2022/236908, PCT Pub. Date Nov. 17, 2022.
Claims priority of application No. 202110520401.X (CN), filed on May 13, 2021.
Prior Publication US 2023/0080875 A1, Mar. 16, 2023
Int. Cl. E21D 9/10 (2006.01); E21D 9/06 (2006.01)
CPC E21D 9/1073 (2013.01) [E21D 9/0642 (2016.01); E21D 9/1006 (2013.01); E21D 9/1066 (2013.01)] 3 Claims
OG exemplary drawing
 
1. A hard rock tunnel boring machine combining microwave heating with high pressure water cutting for assisting in rock breaking, comprising:
a tunnel boring machine body;
a microwave heating assisted rock breaking system; and
a high pressure water cutting assisted rock breaking system,
wherein the microwave heating assisted rock breaking system is arranged on the tunnel boring machine body, and is used for heating and cracking a rock,
wherein the high pressure water cutting assisted rock breaking system is arranged on the tunnel boring machine body, and is used for performing hydraulic cutting on the rock,
wherein a rock breaking sequence lies in that the microwave heating assisted rock breaking system is used for heating and cracking the rock, then the high pressure water cutting assisted rock breaking system is used for performing hydraulic cutting on the rock, and finally, the tunnel boring machine body is used for squeezing and breaking the rock,
wherein the high pressure water cutting assisted rock breaking system comprises a high pressure water pressurization device, a first high pressure water pipe, a rotation joint, a divider, four second high pressure water pipes and four high pressure sprinkler heads,
wherein the divider is mounted at a center of a cutter head of the tunnel boring machine body, the divider adopts a circular ring structure, the divider concentrically sleeves an outer side of a rotating waveguide of the microwave heating assisted rock breaking system, and the divider is fixedly connected with the cutter head,
wherein the rotation joint adopts a circular ring structure and concentrically sleeves the divider, the rotation joint is in rotary sealing connection with the divider, the divider communicates with the rotation joint, and the divider has a rotation degree of freedom relative to the rotation joint,
wherein the high pressure water pressurization device is fixedly mounted on a main beam of the tunnel boring machine body, and a water outlet end of the high pressure water pressurization device communicates with a water inlet end of the rotation joint through the first high pressure water pipe,
wherein a water outlet end of the divider is divided into four paths for output, each path communicates with one second high pressure water pipe, and one high pressure sprinkler head is connected to a water outlet end of each second high pressure water pipe, and
wherein the high pressure sprinkler heads are fixedly embedded in high pressure water spraying through holes in the cutter head, and spraying ends of the high pressure sprinkler heads are right opposite to a surface of the rock.