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CN-121976814-A - Rotary propulsion auxiliary tunneling machine and tunneling method for hard rock mining

CN121976814ACN 121976814 ACN121976814 ACN 121976814ACN-121976814-A

Abstract

The invention relates to a rotary propulsion auxiliary tunneling machine for hard rock mining and a tunneling method, the tunneling machine comprises a frame, a supporting plate is connected to the front side of the frame, a rock digging mechanism is rotatably arranged on the inner wall of the supporting plate, a thrust mechanism for pushing the rock digging mechanism to tunnel is arranged in the frame, and a dust settling mechanism for settling dust of the rock digging mechanism is arranged at the top of the frame; the tunneling method comprises the steps of rotary rock breaking, supporting and fixing, collaborative propulsion, intelligent dust fall and the like. The invention realizes the integral upgrading of the hard rock tunneling technical system by five innovations of rotary hob rock breaking, hydraulic support pushing, reciprocating swing dust fall, intelligent cooperative control and complete machine adaptive design, has high rock breaking efficiency, high complete machine stability and low failure rate, and provides a safe, efficient and reliable mechanized tunneling solution for hard rock mines.

Inventors

  • YANG YONG
  • LIU HAI
  • XU MINJIE
  • SUN CHANGKUN
  • TONG ZHIFU
  • FANG LIN

Assignees

  • 云南黄金矿业集团股份有限公司

Dates

Publication Date
20260505
Application Date
20260306

Claims (9)

  1. 1. The rotary propulsion auxiliary heading machine for hard rock mining is characterized by comprising a frame (1), wherein a supporting plate (101) is movably arranged on the front side of the frame (1), a rock digging mechanism (2) is rotatably arranged on the inner wall of the supporting plate (101), a thrust mechanism (3) for pushing the rock digging mechanism (2) to tunnel is arranged in the frame (1), and a dust settling mechanism (4) for settling dust of the rock digging mechanism (2) is arranged at the top of the frame (1); the rock digging mechanism (2) comprises a round shell (201) rotatably arranged on the inner wall of a supporting plate (101), a plurality of hob (202) are rotatably connected inside the outer end face of the round shell (201), an inner gear disc (204) is circumferentially connected inside the round shell (201), at least three high-power motors (205) are connected to the front side of the supporting plate (101), an output shaft of each high-power motor (205) is connected with a first gear (207) through a first rotating shaft (206), and the first gears (207) are meshed with the inner wall of the inner gear disc (204); The thrust mechanism (3) comprises a plurality of guide rods (301) connected to the inner wall of the frame (1), the guide rods (301) are connected with the same supporting block (302) in a sliding mode, a pushing oil cylinder (303) is arranged in the center of the supporting block (302), the output end of the pushing oil cylinder (303) is connected with a stress plate (305) through a pushing shaft (304), and the other side of the stress plate (305) is connected with the rear side of the supporting plate (101).
  2. 2. A rotary propulsion auxiliary heading machine for hard rock mining according to claim 1, characterized in that a plurality of hydraulic devices (308) are symmetrically arranged on two sides of the supporting block (302), the output end of each hydraulic device (308) is connected with a hydraulic rod (309), and the free ends of all the hydraulic rods (309) on the same side of the supporting block (302) extend to the outer side of the frame (1) and are connected with the same extrusion plate (311).
  3. 3. The rotary propulsion auxiliary heading machine for hard rock mining according to claim 2, wherein a sliding column (310) is further connected between the hydraulic rod (309) and the extrusion plate (311), a sliding block (307) is slidably arranged on the outer surface of the sliding column (310), a plurality of limiting grooves (306) are formed in the side plates of the frame (1), and the sliding block (307) is slidably arranged in the limiting grooves (306).
  4. 4. A rotary propulsion assisted tunneling machine for hard rock mining according to any of claims 1-3, characterized in that said dust settling means (4) comprises two fixed plates (401) arranged on top of the frame (1), a spraying plate (403) is arranged between said two fixed plates (401), the other side of said spraying plate (403) is connected to the water outlet end of a water pump (414) through a water pipe (415), the water inlet end of said water pump (414) is connected to a water tank (413) through a pipe, said water tank (413) is arranged on the outer wall of the frame (1).
  5. 5. A rotary push assisted tunneller for hard rock mining as claimed in claim 4, wherein, The spraying plate (403) is rotatably connected between the two fixing plates (401) through a rotating shaft (402), a second gear (404) is connected to the outer surface of one end of the rotating shaft (402), a rack (410) is meshed with the bottom of the second gear (404), a limiting groove (411) is formed in the rack (410), a limiting L-shaped block (412) is slidably arranged in the limiting groove (411), a horizontal section of the limiting L-shaped block (412) is embedded in the limiting groove (411), a vertical section of the limiting L-shaped block is connected to the top surface of the frame (1), one end, far away from the second gear (404), of the rack (410) is connected with a driven frame body (409), a driving shaft (408) is slidably arranged in the driven frame body (409), the other end of the driving shaft (408) is connected with a disc (407), the center position of the disc (407) is connected with a second rotating shaft (406), and the second rotating shaft (406) is connected with an output shaft of a motor (405) through a coupler.
  6. 6. A rotary push assist heading machine for hard rock mining as defined in claim 1 wherein, The hob cutters (202) are arranged in a double helix.
  7. 7. A tunneling method of a rotary propulsion auxiliary tunneling machine for hard rock mining, which is characterized by comprising the following steps: S1, rotary rock breaking, namely starting all high-power motors (205) to drive all first gears (207) to synchronously rotate at 20-35rpm, enabling a circular shell (201) to rotate through transmission of an internal gear plate (204), and enabling a hob (202) to rotate through rock friction while revolving to realize rolling rock breaking; S2, supporting and fixing, namely starting a hydraulic device (308) to enable a hydraulic rod (309) to extend outwards under the state of standing a propulsion oil cylinder (303), and pushing an extrusion plate (311) to tightly lean against the side wall of a roadway at 12-18MPa to form a propulsion reaction force support; And S3, cooperatively propelling, namely maintaining supporting pressure, starting a propelling oil cylinder (303) to propel at a speed of 3-15mm/min, enabling a propelling shaft (304) to extend to transmit propelling force to a rock digging mechanism (2) through a force bearing plate (305), further driving a hob (202) to be pressed into depth, enabling a circular shell (201) to break rock forwards in cooperation with the hob (202), retracting a hydraulic device (308) after the propelling stroke reaches the maximum limit value, enabling a squeezing plate (311) to be separated from a roadway wall, retracting the propelling oil cylinder (303), and enabling the rock digging mechanism (2) to retract to an initial position, thereby completing one working cycle.
  8. 8. A tunneling method of a rotary push assist tunneling machine for hard rock mining according to claim 7, wherein in stage S3, when the push resistance exceeds a preset threshold, the system automatically decreases the push speed by 10% -20% while increasing the rotational speed by 5-10rpm.
  9. 9. The tunneling method of the rotary propulsion auxiliary tunneling machine for hard rock mining according to claim 7, wherein in the whole process of S1-S3, if a large amount of dust is generated, a dust falling mechanism (4) is started, a water pump (414) supplies water for a spraying plate (403), and meanwhile, the spraying plate (403) drives to swing reciprocally through a motor (405), so that spraying covers the whole working surface, and high-efficiency dust falling is realized.

Description

Rotary propulsion auxiliary tunneling machine and tunneling method for hard rock mining Technical Field The invention belongs to the technical field of mining machinery, and particularly relates to a rotary propulsion auxiliary tunneling machine for hard rock mining and a tunneling method using the same, which are particularly suitable for hard rock tunnel tunneling engineering with compressive strength of 100-150 MPa. Background In the underground roadway tunneling engineering of a hard rock mine, a traditional cantilever type tunneling machine drives a cutting head to swing through a hydraulic arm to break the rock. The rock breaking mode relies on the impact and shearing action of the cutting pick on the rock, and when the rock breaking mode is applied to hard rock (the compressive strength is more than 100 MPa), the rock breaking mode has the advantages that the pushing speed is low, the month footage in hard granite is usually less than 80 m, the mine construction period is seriously affected, the cutting head vibrates severely, the equipment failure rate is high, the maintenance cost is high, the cutting pick loss is extremely high, the service life is short, the tunneling cost is high due to the fact that frequent replacement is needed, the energy utilization rate of the cutting pick is low, most of energy is converted into friction heat, red heat and failure of the cutting pick are caused, a large amount of dust is generated, and the operation environment is affected. Disclosure of Invention Aiming at the problems, the invention aims to provide a rotary propulsion auxiliary tunneling machine and a tunneling method for hard rock mining, which solve the technical problems of low hard rock tunneling efficiency, high cost and poor environment in the prior art by changing a rock breaking mode, optimizing thrust transmission and intelligently suppressing dust. In order to solve the technical problems, the invention provides a rotary propulsion auxiliary heading machine for hard rock mining, which comprises a frame, wherein a supporting plate is movably arranged at the front side of the frame, a rock digging mechanism is rotatably arranged on the inner wall of the supporting plate, a thrust mechanism for pushing the rock digging mechanism to tunnel is arranged in the frame, and a dust falling mechanism for falling dust to the rock digging mechanism is arranged at the top of the frame; the rock digging mechanism comprises a round shell rotationally arranged on the inner wall of a supporting plate, a plurality of hob are rotationally connected inside the outer end surface of the round shell, and an internal gear disc is circumferentially connected inside the round shell; The thrust mechanism comprises a plurality of guide rods connected to the inner wall of the frame, the guide rods are connected with the same support block in a sliding manner, a pushing oil cylinder is arranged in the center of the support block, the output end of the pushing oil cylinder is connected with a stress plate through a pushing shaft, and the other side of the stress plate is connected with the rear side of the support plate. Further, a plurality of hydraulic devices are symmetrically arranged on two sides of the supporting block, each hydraulic device output end is connected with a hydraulic rod, and the free ends of all hydraulic rods on the same side of the supporting block extend to the outer side of the frame and are connected with the same extrusion plate. Further, still be connected with the slip post between hydraulic stem and the stripper plate, the surface slip of slip post is provided with the sliding block, a plurality of spacing recesses have been seted up on the curb plate of frame, the sliding block slides and sets up in spacing recess. Further, dust fall mechanism is including setting up in two fixed plates at frame top, two be provided with between the fixed plate and spray the board, spray the opposite side of board and pass through water piping connection in the water pump play water end, the water inlet end of water pump passes through pipeline and water tank intercommunication, the water tank sets up on the frame outer wall. Further, the spraying plate is rotationally connected between the two fixing plates through a rotating shaft, a second gear is connected to the outer surface of one end of the rotating shaft, a rack is meshed with the bottom of the second gear, a limiting groove is formed in the rack, a limiting L-shaped block is slidably arranged on the limiting groove, a horizontal section of the limiting L-shaped block is embedded into the limiting groove, a vertical section of the limiting L-shaped block is connected to the top surface of the frame, one end, far away from the second gear, of the rack is connected with a driven frame body, a driving shaft is slidably arranged in the driven frame body, a disc is connected to the other end of the driving shaft, a second rotating shaft is connected to the