Method for side air supply of driving face of large-diameter deep vertical shaft

A large-diameter, vertical shaft technology, applied in mine/tunnel ventilation, earthwork drilling, mining equipment, etc., can solve problems such as the inability to effectively improve the working environment of the driving face, the restriction of conventional ventilation and dust removal functions, and the restriction of the construction of large-scale deep mines, etc. Achieving wide availability, reduced air age, improved thermal environment

Active Publication Date: 2014-07-23
CHINA UNIV OF MINING & TECH
3 Cites 4 Cited by

AI-Extracted Technical Summary

Problems solved by technology

[0005] For large-diameter deep shafts with a diameter of more than 10 meters, because the working area at the bottom of the well is greatly increased compared with the shallow shaft, the air flow cannot be fully convected and diffused in the space of the working face during traditional tunneling ventilation, ...
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Method used

Large-diameter deep shaft excavation face side air supply method of the present invention, comprises setting in vertical shaft and passes through the air supply cylinder of multi-layer hanging plate side, and air supply cylinder comprises sequentially connected main air supply cylinder 1, vertically flexible Air duct 2, vertical flexible air duct hole 3. As the excavation depth of the vertical shaft continues to increase, the ambient temperature of the excavation surface gradually increases. First, the three induction tuyere pipes 8, 9, and 10 are respectively fixed to the bottom of the suspension plate 5 on the last layer through the bracket 7 near the main air supply tube hole 4, and the induced air flow is induced. The tuyere pipes 8, 9, 10 are detachable and adjustable in angle, and can realize air supply in different horizontal and vertical directions according to actual needs; the support 7 is detachable and vertically movable, and can realize the induced tuyere pipe 8, 9 and 10 supply air to different heights. Use three sections of horizontal flexible air cylinders 6 of th...
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Abstract

The invention provides a method for side air supply of a driving face of a large-diameter deep vertical shaft. According to the method for side air supply of the driving face of the large-diameter deep vertical shaft, for a high-temperature driving face of a deep vertical shaft with the diameter larger than ten meters, a vertical flexible air duct is connected with a traditional vertical main air supply duct and a four-way main air inlet pipe fixed to the bottom side of a last-layer hanging scaffold, transverse flexible air ducts are connected with branch air inlet pipes of a four-way device and guiding air inlet pipes installed at the bottom of the last-layer hanging scaffold, and then fresh air flow can be directly supplied to the driving face located below the last-layer hanging scaffold. The guiding air inlet pipes are installed on the lower side of the last-layer handing scaffold through a suspender, both the air supply angle and the air supply height of each guiding air inlet pipe can be adjusted, so that air can be supplied to different areas of the driving face, and the functions of vertical ventilation and dust removal are also achieved. By the adoption of the method for side air supply of the driving face of the large-diameter deep vertical shaft, most areas of the driving face are located on the fresh air flow side, the occupied area of the flexible air ducts and the guiding air inlet pipes is small, normal driving construction of the vertical shaft is not influenced, additional arrangement of a tail-end draught fan is not needed, multiple-angle side air supply with multiple air inlet pipes can be achieved through the air pressure of a main ventilation fan, and the thermal environment of the high-temperature driving face of the deep vertical shaft is remarkably improved.

Application Domain

Technology Topic

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  • Method for side air supply of driving face of large-diameter deep vertical shaft
  • Method for side air supply of driving face of large-diameter deep vertical shaft

Examples

  • Experimental program(1)

Example Embodiment

[0017] An embodiment of the present invention will be further described below in conjunction with the accompanying drawings:
[0018] The method for air supply on the side of the driving face of a large-diameter deep shaft of the present invention includes providing an air supply tube passing through one side of the multi-layer suspension plate in the vertical shaft. The air supply tube includes a main air supply tube 1 and a vertical flexible air tube 2 connected sequentially. , Vertical flexible air duct hole 3. With the continuous increase of shaft excavation depth, the ambient temperature of the excavation face gradually rises. Firstly, three induction ducts 8, 9, 10 are fixed to the bottom of the suspension pan 5 of the last layer through the bracket 7 and near the main air supply cylinder hole 4. The air outlet pipes 8, 9, 10 are detachable and adjustable in angle, which can realize different horizontal and vertical air supply according to actual needs; the bracket 7 is detachable and can be moved vertically, which can realize the induction air outlet pipe 8, 9, 10 Air supply to different heights. Use three horizontal flexible air ducts 6 of the same length to connect the three induction ducts 8, 9, 10 in parallel to the three branch ducts 12, 13, 14 of the four-way 11 along the horizontal direction of the bottom of the last layer of the suspension plate 5; According to actual needs, the number of four-way 11 branch duct ducts 12, 13, 14 and induction ducts 8, 9, 10 can be adjusted. The three sections of horizontal flexible air duct 6 are respectively connected by flanges to the induced air outlet pipes 8, 9, 10 and the four-way branch air outlet pipes 12, 13, and 14. In order to ensure the resistance balance and uniform air volume, the three-section flexible air duct The length is equal. The main air inlet of the four-way 11 adopts the vertical flexible air duct 2 to connect to the main air supply duct 1 along the vertical flexible air duct hole 3, so that the fresh air flow can be sent to the deep shaft from the side of the induction duct 8, 9, 10 The side air supply mode of the face. The vertical flexible air cylinder 2 is connected with the main air supply cylinder 1 by a flange, which facilitates the disassembly and assembly of the multi-layer suspension plate when it is moved.
[0019] In addition, when the air supply angle of the induction ducts 8, 9, 10 is adjusted to the vertical direction, the lateral air supply mode is changed to the vertical air supply mode, and the dust removal function of conventional ventilation can also be realized.
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Description & Claims & Application Information

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