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CN-122014265-A - Rapid construction method for large-section horsehead door layered step shallow hole blasting

CN122014265ACN 122014265 ACN122014265 ACN 122014265ACN-122014265-A

Abstract

The invention provides a rapid construction method for large-section horsehead door layering step shallow hole blasting, which relates to the technical field of mine construction and comprises the following steps of firstly, dividing a large-section horsehead door into an upper layering of the large-section horsehead door and a lower layering of the large-section horsehead door; when the shaft is tunneled to the position of the large-section horsehead door, the blasting depth reaches below the elevation of the design bottom plate of the large-section horsehead door, slag is discharged to the layered elevation position on the large-section horsehead door, and the shaft gangue is discharged out of the shaft, and the shaft is completely discharged and supported and protected in the upper layered position of the large-section horsehead door, and the shaft is continuously discharged to the layered elevation position under the large-section horsehead door. The rapid construction method for the layered step shallow hole blasting of the large-section horsehead door is used for rapid digging and building construction of the large-section horsehead door or the large-section chamber of the vertical shaft, is beneficial to shortening the construction period, saving the construction cost and improving the construction efficiency of the large-section horsehead door or the large-section chamber.

Inventors

  • LI YONG
  • HUANG HAIPENG
  • XU KAI
  • FENG HONGBAO
  • FANG YING

Assignees

  • 铜陵有色金属集团铜冠矿山建设股份有限公司

Dates

Publication Date
20260512
Application Date
20260317

Claims (9)

  1. 1.A rapid construction method for large-section horsehead door layered step shallow hole blasting is characterized by comprising the following steps: Dividing a large-section horsehead door (3) into an upper large-section horsehead door layering (4) and a lower large-section horsehead door layering (6); when the vertical shaft (1) is tunneled to the position of the large-section horsehead door (3), the blasting depth reaches below the elevation of the design bottom plate of the large-section horsehead door (3), slag is discharged to the elevation position of the layering (4) on the large-section horsehead door, and the shaft gangue I (2) is discharged out of the shaft; Step three, fully deslagging and supporting protection are carried out in the upper layering (4) of the large-section horsehead door; continuously deslagging a vertical shaft (1) to the level position of a layering (6) below a large-section horsehead door, and discharging shaft gangue II (5) out of the shaft; And fifthly, performing one-time blasting forming on the part of the large-section horsehead door lower layering (6), discharging gangue slag of the large-section horsehead door lower layering (6) to the ground surface after blasting, and finishing the digging and building of the large-section horsehead door (3).
  2. 2. The rapid construction method for large-section horsehead door layered step shallow hole blasting according to claim 1, wherein the height of the upper layered layer (4) of the large-section horsehead door is 1.8 m-3 m.
  3. 3. The rapid construction method for large-section horsehead door layered step shallow hole blasting according to claim 1, wherein rock drilling, charging, wire connection and blasting are performed on the large-section horsehead door layered layer (4) in a circulating manner in the second step, and slag is discharged until the horsehead door design position is reached, so that the large-section horsehead door layered layer (4) is excavated.
  4. 4. The rapid construction method for large-section overhead door layered step shallow hole blasting according to claim 1, wherein the support supporting structure is used for supporting and protecting the inner top of the large-section overhead door upper layered layer (4) during or after the inner excavation process of the large-section overhead door upper layered layer (4) is completed.
  5. 5. The rapid construction method for large-section horsedoor layered step shallow hole blasting according to claim 4, wherein the supporting and supporting structure comprises a top supporting platform (41), the bottom of the top supporting platform (41) is in supporting and limiting connection with the top of the large-section horsedoor lower layered layer (6) through a first supporting rod (43), and the top of the top supporting platform (41) is in supporting connection with the inner wall of the large-section horsedoor upper layered layer (4) through a second supporting rod (44).
  6. 6. The rapid construction method for large-section horsedoor layered step shallow hole blasting according to claim 5, wherein the first support rods (43) are selected into two symmetrical groups, the tops of the two groups of first support rods (43) are connected with the top support platform (41) through the variable connecting device (42), and the bottoms of the two groups of first support rods (43) are crossed towards the outer side and mutually abutted against the edge position of the upper end surface of the large-section horsedoor lower layered layer (6).
  7. 7. The rapid construction method for large-section horsedoor layered step shallow hole blasting according to claim 6, wherein the variable connection device (42) is a state-variable structure, and is in a rigid state during supporting and in a non-rigid state during blasting.
  8. 8. The rapid construction method for large-section horsedoor layered step shallow hole blasting according to claim 6, wherein the variable connecting device (42) comprises a first limiting base, a second limiting base and a hydraulic telescopic structure arranged between the two limiting bases, oil is pumped into the variable connecting device (42) to control the variable connecting device (42) to be in an extending state, and before blasting, the variable connecting device (42) is controlled to be in a conducting and contractible state.
  9. 9. The rapid construction method for large-section horsehead door layered step shallow hole blasting according to claim 8, wherein a plurality of hydraulic telescopic structures are communicated by adopting the same pump liquid structure, and a pressure detection structure is further arranged in the hydraulic telescopic structures.

Description

Rapid construction method for large-section horsehead door layered step shallow hole blasting Technical Field The invention relates to the technical field of mine construction, in particular to a rapid construction method for large-section horsehead door layered step shallow hole blasting. Background The construction of the shaft horsehead door is a key work on a key line of shaft digging and building construction, and the speed of the construction directly influences the progress period of the whole key line. The current construction method of the shaft horsehead door comprises the following steps of construction by a one-section full-section drilling and blasting method. The method is quick and efficient, the section is formed at one time, and the method is suitable for horse head doors with smaller sections and two-step and positive-step layered construction methods. According to the method, the upper step part of the horsehead door is firstly drilled and blasted, then the lower step part is drilled and blasted, the lower step is used as a construction platform for drilling and blasting the next upper step, and a certain reserved length is required to be reserved for the lower step. The method is suitable for large-section horsehead door construction, but has the defects of frequent construction procedure conversion of drilling, blasting, supporting, slag discharging and the like, low construction efficiency and long construction period. Disclosure of Invention Aiming at the problems, the invention provides a large-section horsehead door layering step shallow hole blasting rapid construction method which is used for rapid digging and building construction of a shaft large-section horsehead door or a large-section chamber, is beneficial to shortening the construction period, saving the construction cost and improving the construction efficiency of the large-section horsehead door or the chamber. In order to solve the problems, the invention adopts the following technical scheme: A rapid construction method for large-section horsehead door layered step shallow hole blasting comprises the following steps of firstly dividing a large-section horsehead door into an upper layered part and a lower layered part, secondly discharging shaft gangue to the ground surface after the shaft is driven to the position below the design bottom plate elevation of the large-section horsehead door, thirdly, completely discharging and supporting protection in the upper layered part of the large-section horsehead door, fourthly, continuously discharging the shaft gangue to the lower layered elevation position of the large-section horsehead door, and finally discharging the shaft gangue to the shaft, and fifthly, performing one-time blasting forming on the lower layered part of the large-section horsehead door, discharging the gangue slag of the lower layered part of the large-section horsehead door to the ground surface after blasting, thereby completing the driving of the large-section horsehead door. Preferably, the height of the upper layering 4 of the large-section horsehead door is 1.8 m-3 m. Preferably, in the second step, rock drilling, charging, connecting and blasting are carried out on the large-section horsehead door in a layered manner, and then slag is discharged until the horsehead door is designed to finish layered digging and building on the large-section horsehead door. Preferably, the support supporting structure is used for supporting and protecting the inner top of the large-section horsehead door in the process of mining the large-section horsehead door in the layering manner or after the large-section horsehead door is mined. Preferably, the supporting and supporting structure comprises a top supporting platform, the bottom of the top supporting platform is limited by a first supporting rod and a layered top supporting part under the large-section horsehead door, and the top of the top supporting platform is connected with a layered inner wall supporting part on the large-section horsehead door by a second supporting rod. Preferably, the first support rods are selected into two symmetrical groups, the tops of the two groups of first support rods are connected with the top support platform through the variable connecting device, and the bottoms of the two groups of first support rods are crossed towards the outer side and mutually abutted against the edge position of the upper end surface of the lower layering of the large-section horsehead door. Preferably, the variable connection device is a state-variable structure, and is in a rigid state during supporting and in a non-rigid state during blasting. Preferably, the variable connecting device comprises a first limiting base, a second limiting base and a hydraulic telescopic structure arranged between the two limiting bases, oil is pumped into the variable connecting device to control the variable connecting device to be in an extending state, and before blas