Shield and blasting comprehensive tunneling method for ultra-deep vertical shaft

Abstract

The invention discloses a shield and blasting comprehensive tunneling method for an ultra-deep vertical shaft. The shield and blasting comprehensive tunneling method comprises the following steps that S1, a rock-soil layer in the vertical shaft is excavated through a separated cutterhead shield tunneling machine; s2, an annular pilot tunnel is excavated in the tunnel face of the hard rock stratum in the vertical shaft through a separated cutterhead shield tunneling machine; s3, after excavation of the annular pilot tunnel is completed, the telescopic assembly and the annular cutterhead driving assembly are closed; s4, a blast hole is formed in the tunnel face which is not excavated, and a cartridge is installed in the blast hole; s5, a telescopic assembly is started, the telescopic assembly drives the arc-shaped block cutterhead to move upwards, and the arc-shaped block cutterhead is made to return to the tunnel face; s6, initiating explosive cartridges, and removing rock slag generated after the explosive cartridges are exploded; and S7, the step S2 to the step S6 are repeated, and the next tunnel face is excavated till shaft excavation is completed. The method has the advantages that by the adoption of the shaft shield and blasting comprehensive tunneling method, back break and back break can be accurately controlled and eliminated, the number of blasting cartridges can be reduced, and the construction efficiency of the ultra-deep shaft is improved.

Description

Technical Field

[0001] The invention belongs to the technical field of ultra-deep vertical shaft construction, and in particular relates to an ultra-deep vertical shaft shield and blasting comprehensive excavation method. Background Art

[0002] my country's cities are developing rapidly, but in the process of decades of development, due to changes in development concepts at various stages, unreasonable urban planning, economic costs and population growth, urban space utilization and layout are unreasonable, as well as old and dilapidated renovation, urban development cannot meet people's needs, and urban renewal and transformation have become the future development trend. With the acceleration of urban renewal in my country, the problem of underground space utilization has become increasingly prominent. Major cities have built shaft garages to alleviate parking difficulties, underground storage pools to regulate flood disasters and recycle water resources, and shafts as underground energy storage and underground energy storage space, mountain tunnel ventilation shafts, etc. Shaft construction methods are divided into manual excavation construction, semi-mechanical excavation construction and mechanical excavation construction. Shield tunneling is widely used due to its advantages such as fast excavation speed, high safety and little impact on the surrounding environment.

[0003] The mechanized construction of large-diameter ultra-deep shafts has always been a difficult problem in the field of underground engineering. Currently, most construction uses manual excavation of shafts. After the shaft is built on the ground, it sinks as it is excavated. The construction speed is slow, and the shaft is prone to deflection, unsmooth sinking, and the need to add sinking aids. In recent years, with the development of science and technology, some mechanized construction equipment has gradually emerged, but there are problems such as low mechanization, slow slag discharge speed affecting construction progress, severe tool wear and frequent tool changes. Especially in the construction of ultra-deep shafts, the complex strata cannot be fully utilized, and the shield has high safety, little impact on the surrounding environment, and high efficiency in drilling and blasting hard rock excavation. Summary of the invention

[0004] The purpose of the present invention is to provide an ultra-deep shaft shield and blasting integrated excavation method based on the above-mentioned deficiencies of the prior art, utilizing a separate cutterhead shield machine, which is composed of a cutterhead assembly, a telescopic assembly, an annular cutterhead drive assembly, a central cutterhead drive assembly and a shield. The annular cutterhead drive assembly and the central cutterhead drive assembly are both arranged in the shield, the telescopic assembly is installed on the annular cutterhead drive assembly and connected to the cutterhead assembly, the central cutterhead drive assembly is connected to the cutterhead assembly, the cutterhead assembly includes an arc block cutterhead and a central cutterhead, the telescopic assembly drives the arc block cutterhead to perform lifting and lowering movements, the annular cutterhead drive assembly drives the telescopic assembly to perform rotational movements, and the central cutterhead drive assembly drives the central cutterhead to perform rotational movements. During the ultra-deep shaft excavation process, a separate cutterhead shield machine is first used to carry out full-section excavation of the soil or low-strength rock and soil. Then, an arc-shaped block cutterhead shield is used to form an annular guide tunnel for the hard rock stratum, providing a pre-cracking surface and increasing the blasting air surface for the drilling and blasting excavation of large-diameter hard rock shafts. Finally, the drilling and blasting method is used for the core hard rock face rock mass. The use of a comprehensive excavation method of shaft shield and blasting can not only achieve precise control to eliminate over-excavation and under-excavation, but also reduce the number of blasting cartridges, improve the construction efficiency of ultra-deep shafts, and save costs.

[0005] The purpose of the present invention is achieved by the following technical solutions: An ultra-deep shaft shield and blasting integrated excavation method, the excavation method comprising the following steps: S1: Use a split cutterhead shield machine to excavate the rock and soil layer in the shaft; Wherein, the separated cutterhead shield machine comprises a cutterhead assembly, a telescopic assembly, an annular cutterhead drive assembly, a central cutterhead drive assembly and a shield, wherein the annular cutterhead drive assembly and the central cutterhead drive assembly are both arranged in the shield, the telescopic assembly is mounted on the annular cutterhead drive assembly and connected to the cutterhead assembly, and the central cutterhead drive assembly is connected to the cutterhead assembly; the cutterhead assembly comprises an arc block cutterhead and a central cutterhead, the arc block cutterhead is arranged on the outer side of the central cutterhead, a plurality of the arc block cutterheads are arranged along the circumferential direction, the central cutterhead comprises a central circular cutterhead and a fan-shaped cutterhead, a plurality of the fan-shaped cutterheads are arranged along the circumferential direction of the central circular cutterhead, slag inlets are formed between adjacent arc block cutterheads and between adjacent fan-shaped cutterheads; the telescopic assembly drives the arc block cutterhead to perform lifting motion, the annular cutterhead drive assembly drives the telescopic assembly to perform rotational motion, and the central cutterhead drive assembly drives the central cutterhead to perform rotational motion; When excavating the rock and soil layer, the telescopic assembly is in a minimum stroke state, the annular cutter disc drive assembly and the central cutter disc drive assembly are started, and the annular cutter disc drive assembly and the central cutter disc drive assembly drive the cutter disc assembly to rotate and excavate; S2: using the split cutterhead shield machine to excavate an annular pilot tunnel on the tunnel face of the hard rock formation in the shaft; Wherein, when excavating the hard rock formation, the central cutter disc drive assembly is turned off, the telescopic assembly and the annular cutter disc drive assembly are started, the telescopic assembly drives the arc block cutter disc to move downward, and the annular cutter disc drive assembly drives the arc block cutter disc to rotate; S3: After the excavation of the annular guide tunnel is completed, the telescopic assembly and the annular cutter head driving assembly are closed; S4: opening a blasthole on the unexcavated tunnel face and installing a charge in the blasthole; S5: starting the telescopic assembly, which drives the arc block cutter disc to move upward, so that the arc block cutter disc retreats to the tunnel face; S6: detonating the explosive roll and removing rock slag generated after the explosive roll is exploded; S7: Repeat steps S2 to S6 to excavate the next tunnel face until the excavation of the shaft is completed.

[0006] The annular cutter disc drive assembly includes a reaction frame, a planetary motor and a gear. A plurality of the planetary motors are arranged circumferentially along the reaction frame, and a gear is provided on the planetary motor shaft of the planetary motor.

[0007] The reaction frame is composed of a fan-shaped support plate, a reaction plate, a radial rib plate and an arc-shaped rib plate. The reaction plate is circular, and a plurality of fan-shaped support plates are arranged along the circumference of the reaction plate. The radial rib plates and the arc-shaped rib plates are arranged along the radial direction and the arc-shaped rib plate respectively.

[0008] The telescopic assembly includes a hydraulic cylinder, a base and a ring gear. The ring gear and the hydraulic cylinder are respectively arranged on the upper and lower sides of the base. The ring gear is meshed with the gear of the driving assembly. The hydraulic cylinders are arranged in multiple groups along the circumference of the base and installed in a protective telescopic tube. The base of the hydraulic cylinder is fixed on the base, and the telescopic rod is connected to the arc block cutter disc. The lower side of the base is sequentially provided with a spiral slag discharge wall and a protective cover from the inside to the outside.

[0009] The center cutter disc drive assembly includes a cutter disc frame and a center cutter disc motor. The base of the center cutter disc motor is installed on the reaction frame. The center cutter disc motor shaft is connected to the fan-shaped cutter disc of the center cutter disc through the cutter disc frame. The center cutter disc motor drives the center cutter disc to rotate.

[0010] The cutter disc frame is composed of a connecting disc and a support foot. The connecting disc is in a circular ring shape. The two sides of the connecting disc are respectively connected to the central cutter disc motor shaft of the central cutter disc motor and the support foot. The support foot is inclined and arranged in plurality along the circumference of the connecting disc. The support foot is connected to the fan-shaped cutter disc of the central cutter disc.

[0011] The cutter disc assembly also includes rollers and scrapers. A group of scrapers are provided on each of the arc-shaped block cutter disc, a group of rollers are provided in the middle of the arc-shaped block cutter disc, several groups of scrapers are provided on each of the arc-shaped two sides of the fan-shaped cutter disc, several groups of rollers are provided in the middle of the fan-shaped cutter disc, and several groups of rollers are provided on the center circle cutter disc.

[0012] The advantages of the present invention are: (1) The split cutterhead shield machine can achieve continuous ultra-deep excavation in complex strata such as soil, rock and hard rock with the same equipment; (2) During the ultra-deep shaft excavation process, a separate cutterhead shield machine is first used to excavate the soil or rock mass with low strength. Then, an arc-shaped block cutterhead shield is used to form a circular guide tunnel for the hard rock formation, which provides a pre-crack surface and increases the blasting free surface for the large-diameter hard rock shaft drilling and blasting excavation. Finally, the drilling and blasting method is used for the core hard rock face. The use of a shaft shield and blasting integrated excavation method can not only achieve precise control to eliminate over-excavation and under-excavation, but also reduce the number of blasting cartridges, improve the construction efficiency of ultra-deep shafts, and save costs. (3) Shield tunneling is highly safe, but there are problems with severe wear of cutters in hard rock formations and high maintenance costs. The drilling and blasting method is low-cost but less safe. Combining the advantages and disadvantages of the shield method and the drilling and blasting method, only arc-shaped block cutters are used to form the pre-splitting surface of the shaft and increase the blasting free surface, which reduces the number of cutters and the length of time they are used, reduces cutter wear, and saves costs. (4) Using an arc-shaped cutterhead shield machine to construct a vertical shaft can form a temporary support around the shaft wall to ensure the safety of the shaft construction; (5) The spiral slag discharge wall can utilize the rotation of the spiral structure to discharge the slag from the annular guide tunnel. BRIEF DESCRIPTION OF THE DRAWINGS

[0013] Figure 1 It is a structural schematic diagram of a separate cutterhead shield machine of the present invention; Figure 2 for Figure 1 AA section view; Figure 3 for Figure 1 BB cross-section diagram; Figure 4 for Figure 1 CC profile of ; Figure 5 for Figure 1DD profile diagram; Figure 6 for Figure 1 EE profile of Figure 7 for Figure 1 FF cross-section diagram; Figure 8 It is a schematic diagram of the construction process of the present invention; Fig. 9 for Figure 8 GG profile in; Fig.10 for Figure 8 HH profile in ; like Figures 1 to 10 As shown, the marks in the figure represent respectively: 1. Split cutterhead shield machine, 2. Deep strata, 3. Vertical shaft, 4. Blast hole, 5. Charge roll; 11. Cutter head assembly, 12. Telescopic assembly, 13. Ring cutter head drive assembly, 14. Center cutter head drive assembly, 15. Shield; 111. arc block cutter disc, 112. center cutter disc, 113. roller cutter, 114. scraper, 115. slag inlet; 121. hydraulic cylinder, 122. telescopic rod, 123. protective telescopic tube, 124. base, 125. ring gear, 126. spiral slag discharge wall, 127. protective cover; 131. Reaction frame, 132. Planetary motor, 133. Planetary motor shaft, 134. Gear, 141. Cutter head frame, 142. Center cutter head motor, 143. Center cutter head motor shaft; 1411. Connecting plate, 1412. Supporting foot; 1311. fan-shaped support plate, 1312. reaction plate, 1313. radial rib plate, 1314. arc-shaped rib plate; 21. Rock and soil layer, 22. Hard rock stratum, 23. Palm face, 24. Annular pilot tunnel. DETAILED DESCRIPTION

[0014] The features of the present invention and other related features are further described in detail below through embodiments in conjunction with the accompanying drawings to facilitate understanding by those skilled in the art: Example: Figures 1 to 10 As shown, this embodiment specifically relates to an ultra-deep shaft shield and blasting integrated excavation method, which mainly includes the following steps: S1: using the split cutterhead shield machine 1 to excavate the rock and soil layer 21 in the shaft 3.

[0015] Among them, Figures 1 to 7As shown, the separate cutterhead shield machine 1 is used for excavating the deep stratum 2 in the shaft 3. The deep stratum 2 includes a soil layer 21 and a hard rock layer 22 arranged in sequence from top to bottom. The separate cutterhead shield machine 1 mainly includes a cutterhead assembly 11, a telescopic assembly 12, an annular cutterhead drive assembly 13, a central cutterhead drive assembly 14 and a shield 15. The annular cutterhead drive assembly 13 and the central cutterhead drive assembly 14 are both arranged in the shield. The telescopic assembly 12 is installed on the annular cutterhead drive assembly 13 and connected to the cutterhead assembly 11. The central cutterhead drive assembly 14 is connected to the cutterhead assembly 11. The cutterhead assembly 11 includes an arc block cutterhead 111, a central cutterhead 112, a roller cutter 113 and a scraper 114. The arc block cutterhead 111 is arranged on the central cutterhead. On the outside of the disc 112, the arc block cutter disc 111 and the center cutter disc 112 are both equipped with a roller cutter 113 and a scraper 114. The telescopic assembly 12 drives the arc block cutter disc 111 to perform lifting movement, the annular cutter disc driving assembly 13 drives the telescopic assembly 12 (arc block cutter disc 111) to perform rotational movement, and the center cutter disc driving assembly 14 drives the center cutter disc 112 to perform rotational movement. The arc block cutter disc 111 and the center cutter disc 112 are used to excavate the rock and soil layer 21, and the arc block cutter disc 111 is used to excavate an annular guide hole 24 on the tunnel face 23 of the hard rock formation 22.

[0016] There are 6 arc-shaped cutter discs 111 arranged along the circumference, and the center cutter disc 112 includes a center circle cutter disc and a fan-shaped cutter disc. There are 6 fan-shaped cutter discs arranged along the circumference of the center circle cutter disc. The arc-shaped cutter discs 111, the fan-shaped cutter discs and the center circle cutter disc are arranged concentrically, and slag inlets 115 are formed between adjacent arc-shaped cutter discs 111 and between adjacent fan-shaped cutter discs. A group of scrapers 114 are arranged on both sides of the arc of the arc-shaped cutter disc 111, a group of rollers 113 are arranged in the middle of the arc-shaped cutter disc 111, two groups of scrapers 114 are arranged on both sides of the arc of the fan-shaped cutter disc, two groups of rollers 113 are arranged in the middle of the fan-shaped cutter disc, and two groups of rollers 113 are arranged on the center circle cutter disc, and the two groups of rollers 113 of the center circle cutter disc are in a cross shape. The roller cutter 113 and the scraper 114 are used for excavating the deep stratum 2 to form rock slag, and the rock slag can enter the telescopic assembly 12 from the slag inlet 115 .

[0017] The telescopic assembly 12 includes a hydraulic cylinder 121, a base 124 and a ring gear 125. The base 124 is annular. The ring gear 125 and the hydraulic cylinder 121 are respectively arranged on the upper side and the lower side of the base 124. Six groups of hydraulic cylinders 121 are arranged along the circumference of the base 124 and installed in the protective telescopic tube 123. Each group of hydraulic cylinders 121 includes two hydraulic cylinders 121. The two ends of the protective telescopic tube 123 are respectively connected to the arc block cutter disc 111 and the base 124 to protect the hydraulic cylinder 121. The base of the hydraulic cylinder 121 is fixed on the base 124, and the telescopic rod 122 is connected to the arc block cutter disc 111. The hydraulic cylinder 121 drives the arc block cutter disc 111 to move up and down through the telescopic rod 122. A spiral slag discharge wall 126 and a protective cover 127 are sequentially arranged on the lower side of the base 124 from the inside to the outside. The protective cover 127 plays a protective role. The spiral structure of the spiral slag discharge wall 126 facilitates the discharge of rock slag from the annular guide hole 24.

[0018] The annular cutter disc drive assembly 13 includes a reaction frame 131, a planetary motor 132 and a gear 134. There are 6 planetary motors 132 arranged circumferentially along the reaction frame 131. A gear 134 is provided on the planetary motor shaft 133 of the planetary motor 132. The gear 134 of the drive assembly 13 is meshed with the annular gear 125 of the telescopic assembly 12. The planetary motor 132 drives the gear 134 to rotate to drive the annular gear 125 to rotate, thereby rotating the telescopic assembly 12, thereby realizing the rotation of the arc block cutter disc 111. The reaction frame 131 is composed of a fan-shaped support plate 1311, a reaction plate 1312, radial ribs 1313 and arc-shaped ribs 1314. The reaction plate 131 is circular. There are 6 fan-shaped support plates 1311 arranged along the circumference of the reaction plate 1312, that is, 6 planetary motors 132 are respectively installed on 6 fan-shaped support plates 1311, and the radial ends of the fan-shaped support plate 1311 are respectively connected to the reaction plate 1312 and the shield 15. The radial ribs 1313 and the arc-shaped ribs 1314 are respectively arranged along the radial direction and arc direction of the fan-shaped support plate 1311, so as to strengthen the fan-shaped support plate 1311.

[0019] The center cutter disc drive assembly 14 includes a cutter disc frame 141 and a center cutter disc motor 142. The base of the center cutter disc motor 142 is installed on the reaction frame 131 (reaction plate 1312). The center cutter disc motor shaft 143 is connected to the fan-shaped cutter disc of the center cutter disc 112 through the cutter disc frame 141. The center cutter disc motor 142 drives the center cutter disc 112 to rotate. The cutter disc frame 141 is composed of a connecting disc 1411 and a support foot 1412. The connecting disc 1411 is annular. The connecting disc 1411 and the base 124 are concentrically arranged. The two sides of the connecting disc 1411 are respectively connected to the center cutter disc motor shaft 143 and the support foot 1412 of the center cutter disc motor 142. The support foot 1412 is inclined and arranged 6 times along the circumference of the connecting disc 1411. The support foot 1412 is connected to the fan-shaped cutter disc of the center cutter disc 112.

[0020] When excavating the rock and soil layer 21, the telescopic rod 122 of the telescopic assembly 12 is in the minimum stroke state, and the planetary motor 132 of the annular cutter disc drive assembly 13 and the central cutter disc motor 142 of the central cutter disc drive assembly 14 are started. The planetary motor 132 of the annular cutter disc drive assembly 13 and the central cutter disc motor 142 of the central cutter disc drive assembly 14 respectively drive the arc block cutter disc 111 and the central cutter disc 112 of the cutter disc assembly 11 to perform rotational excavation.

[0021] S2: using the split cutterhead shield machine 1 to excavate an annular guide tunnel 24 on the tunnel face 23 of the hard rock stratum 22 in the shaft 3.

[0022] When excavating the hard rock formation 22, the central cutter disc motor 142 of the central cutter disc drive assembly 14 is turned off, the hydraulic cylinder 121 of the telescopic assembly 12 and the planetary motor 132 of the annular cutter disc drive assembly 13 are started, the hydraulic cylinder 121 of the telescopic assembly 12 drives the arc block cutter disc 111 to move downward, and the planetary motor 132 of the annular cutter disc drive assembly 13 drives the arc block cutter disc 111 to rotate.

[0023] S3: After the excavation of the annular guide hole 24 is completed, the telescopic rod 122 of the telescopic assembly 12 is in the maximum stroke state, and the hydraulic cylinder 121 of the telescopic assembly 12 and the planetary motor 132 of the annular cutter head drive assembly 13 are turned off.

[0024] S4: a blast hole 4 is opened on the unexcavated tunnel face 23 , and a charge roll 5 is installed in the blast hole 4 .

[0025] The blast holes 4 are arranged along the circumferential direction and radial direction of the unexcavated tunnel face 21 .

[0026] S5: Start the hydraulic cylinder 121 of the telescopic assembly 12, which drives the arc block cutter disc 111 to move upward, so that the arc block cutter disc 111 retreats to the tunnel face 23. At this time, the telescopic rod 122 of the telescopic assembly 12 is in the minimum stroke state.

[0027] S6: Detonating the explosive roll 5 and removing the rock slag produced after the explosive roll 5 is blasted.

[0028] S7: Repeat steps S2 to S6 to excavate the next tunnel face 23 until the excavation of the shaft 3 is completed.

[0029] The beneficial effects of this embodiment are: (1) The split cutterhead shield machine can achieve continuous ultra-deep excavation in complex strata such as soil, rock and hard rock with the same equipment; (2) During the ultra-deep shaft excavation process, a separate cutterhead shield machine is first used to excavate the soil or rock mass with low strength. Then, an arc-shaped block cutterhead shield is used to form a circular guide tunnel for the hard rock formation, which provides a pre-crack surface and increases the blasting free surface for the large-diameter hard rock shaft drilling and blasting excavation. Finally, the drilling and blasting method is used for the core hard rock face. The use of a shaft shield and blasting integrated excavation method can not only achieve precise control to eliminate over-excavation and under-excavation, but also reduce the number of blasting cartridges, improve the construction efficiency of ultra-deep shafts, and save costs. (3) Shield tunneling is highly safe, but there are problems with severe wear of cutters in hard rock formations and high maintenance costs. The drilling and blasting method is low-cost but less safe. Combining the advantages and disadvantages of the shield method and the drilling and blasting method, only arc-shaped block cutters are used to form the pre-splitting surface of the shaft and increase the blasting free surface, which reduces the number of cutters and the length of time they are used, reduces cutter wear, and saves costs. (4) Using an arc-shaped cutterhead shield machine to construct a vertical shaft can form a temporary support around the shaft wall to ensure the safety of the shaft construction; (5) The spiral slag discharge wall can utilize the rotation of the spiral structure to discharge the slag from the annular guide tunnel.

[0030] Although the above embodiments have described in detail the concepts and embodiments of the present invention with reference to the accompanying drawings, ordinary technicians in this field can recognize that various improvements and changes can still be made to the present invention without departing from the scope of the claims, so they are not described one by one here.

Claims

1. A super-deep shaft shield and blasting integrated excavation method, characterized in that The excavation method comprises the following steps: S1: Use a split cutterhead shield machine to excavate the rock and soil layer in the shaft; Wherein, the separated cutterhead shield machine comprises a cutterhead assembly, a telescopic assembly, an annular cutterhead drive assembly, a central cutterhead drive assembly and a shield, wherein the annular cutterhead drive assembly and the central cutterhead drive assembly are both arranged in the shield, the telescopic assembly is mounted on the annular cutterhead drive assembly and connected to the cutterhead assembly, and the central cutterhead drive assembly is connected to the cutterhead assembly; the cutterhead assembly comprises an arc block cutterhead and a central cutterhead, the arc block cutterhead is arranged on the outer side of the central cutterhead, a plurality of the arc block cutterheads are arranged along the circumferential direction, the central cutterhead comprises a central circular cutterhead and a fan-shaped cutterhead, a plurality of the fan-shaped cutterheads are arranged along the circumferential direction of the central circular cutterhead, slag inlets are formed between adjacent arc block cutterheads and between adjacent fan-shaped cutterheads; the telescopic assembly drives the arc block cutterhead to perform lifting motion, the annular cutterhead drive assembly drives the telescopic assembly to perform rotational motion, and the central cutterhead drive assembly drives the central cutterhead to perform rotational motion; When excavating the rock and soil layer, the telescopic assembly is in a minimum stroke state, the annular cutter disc drive assembly and the central cutter disc drive assembly are started, and the annular cutter disc drive assembly and the central cutter disc drive assembly drive the cutter disc assembly to rotate and excavate; S2: using the split cutterhead shield machine to excavate an annular pilot tunnel on the tunnel face of the hard rock formation in the shaft; Wherein, when excavating the hard rock formation, the central cutter disc drive assembly is turned off, the telescopic assembly and the annular cutter disc drive assembly are started, the telescopic assembly drives the arc block cutter disc to move downward, and the annular cutter disc drive assembly drives the arc block cutter disc to rotate; S3: After the excavation of the annular guide tunnel is completed, the telescopic assembly and the annular cutter head driving assembly are closed; S4: opening a blasthole on the unexcavated tunnel face and installing a charge in the blasthole; S5: starting the telescopic assembly, which drives the arc block cutter disc to move upward, so that the arc block cutter disc retreats to the tunnel face; S6: detonating the explosive roll and removing rock slag generated after the explosive roll is exploded; S7: Repeat steps S2 to S6 to excavate the next tunnel face until the excavation of the shaft is completed.

2. The ultra-deep shaft shield and blasting integrated excavation method according to claim 1 is characterized in that The annular cutter disc drive assembly includes a reaction frame, a planetary motor and a gear. A plurality of the planetary motors are arranged circumferentially along the reaction frame, and a gear is provided on the planetary motor shaft of the planetary motor.

3. The ultra-deep shaft shield and blasting integrated excavation method according to claim 2 is characterized in that The reaction frame is composed of a fan-shaped support plate, a reaction plate, a radial rib plate and an arc-shaped rib plate. The reaction plate is circular, and a plurality of fan-shaped support plates are arranged along the circumference of the reaction plate. The radial rib plates and the arc-shaped rib plates are arranged along the radial direction and the arc-shaped rib plate respectively.

4. The method of ultra-deep shaft shield and blasting integrated excavation according to claim 2, characterized in that The telescopic assembly includes a hydraulic cylinder, a base and a ring gear. The ring gear and the hydraulic cylinder are respectively arranged on the upper and lower sides of the base. The ring gear is meshed with the gear of the driving assembly. The hydraulic cylinders are arranged in multiple groups along the circumference of the base and installed in a protective telescopic tube. The base of the hydraulic cylinder is fixed on the base, and the telescopic rod is connected to the arc block cutter disc. The lower side of the base is sequentially provided with a spiral slag discharge wall and a protective cover from the inside to the outside.

5. The ultra-deep shaft shield and blasting integrated excavation method according to claim 2, characterized in that The center cutter disc drive assembly includes a cutter disc frame and a center cutter disc motor. The base of the center cutter disc motor is installed on the reaction frame. The center cutter disc motor shaft is connected to the fan-shaped cutter disc of the center cutter disc through the cutter disc frame. The center cutter disc motor drives the center cutter disc to rotate.

6. The method of ultra-deep shaft shield and blasting integrated excavation according to claim 5, characterized in that The cutter disc frame is composed of a connecting disc and a support foot. The connecting disc is in a circular ring shape. The two sides of the connecting disc are respectively connected to the central cutter disc motor shaft of the central cutter disc motor and the support foot. The support foot is inclined and arranged in plurality along the circumference of the connecting disc. The support foot is connected to the fan-shaped cutter disc of the central cutter disc.

7. The ultra-deep shaft shield and blasting integrated excavation method according to claim 1, characterized in that The cutter disc assembly also includes rollers and scrapers. A group of scrapers are provided on each of the arc-shaped block cutter disc, a group of rollers are provided in the middle of the arc-shaped block cutter disc, several groups of scrapers are provided on each of the arc-shaped two sides of the fan-shaped cutter disc, several groups of rollers are provided in the middle of the fan-shaped cutter disc, and several groups of rollers are provided on the center circle cutter disc.

Images