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Large-section underground cave reducing-span pier structure and use method thereof

A large-section, chamber technology, applied in the direction of earthwork drilling, pillars/brackets, mining equipment, etc., to achieve the effects of reduced caving arch height, easy operation, and stable roadway surrounding rock

Inactive Publication Date: 2010-12-29
CHINA UNIV OF MINING & TECH
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  • Description
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  • Application Information

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Problems solved by technology

[0004] In order to solve the problems existing in the support of large-section tunnels and chambers in coal mines, the present invention proposes a large-section chamber-reduced-span pier structure and its application method

Method used

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  • Large-section underground cave reducing-span pier structure and use method thereof
  • Large-section underground cave reducing-span pier structure and use method thereof

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Embodiment Construction

[0016] In the figure, in the middle of the large-section chamber, 1 to 8 bottom steel cylinders with a diameter of 0.5m to 1.2m are installed, and the upper end of each bottom steel cylinder 1 is fitted with a telescopic steel cylinder 4. There is a corresponding height adjustment through hole 2 between the cylinder 4 and the bottom steel cylinder 1, through which the limit steel bars 3 are interspersed and fixed horizontally, and the steel grid frame is placed in the telescopic steel cylinder 4 and the bottom steel cylinder 1, and then the telescopic steel cylinder 4 Concrete 6 is poured into the bottom steel cylinder 1 to form a span-reducing pier column, and the height of the pier column is adjusted through the limit steel bar 3 according to the height change of the roadway.

[0017] exist figure 1 In this large-section chamber, the span-reducing pier column first processes the bottom steel cylinder 1 and the telescopic steel cylinder 4. The size of the bottom steel cylinde...

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Abstract

The invention relates to a coal mine support structure of a large-section roadway and an underground cave, in particular to a large-section underground cave reducing-span pier structure and a use method thereof. 1-8 base steel cylinders with diameter of 0.5-1.2m are installed in the middle of a large-section underground cave, a telescopic steel cylinder is sleeved in the upper end of each base steel cylinder in a matched way, a regulating through hole with corresponding height is disposed between the telescopic steel cylinder and the sleeved steel cylinder both of which are fixed by transversely inserting a limit reinforced steel bar, reinforced frames are arranged in the telescopic steel cylinder and the base steel cylinders, and concrete is poured in the telescopic steel cylinder and the base steel cylinders to form a reducing-span pier, and the height of the pier can be regulated by the limit reinforced steel bar according to the height change of the roadway. The invention has wide application range, simple structure and easy operation, can provide higher support strength for the roadway and the underground cave, and can realize the efficient span reduction of the large-section roadway and the underground cave.

Description

technical field [0001] The invention relates to a support structure for a large-section roadway and a chamber in a coal mine, in particular to a large-section chamber-reduced-span pier column structure and an application method thereof. Background technique [0002] Coal mine underground roadway intersections, equipment installation chambers and other places have large cross-sections, and their dimensions often reach 30m 2 above. The excavation of large-section roadways and chambers has significantly greater disturbance to rock mass than ordinary roadways, and is prone to large deformation of surrounding rocks. This is more obvious in deep mine soft rock roadways. Some mines have large-section roadways or caverns. The room needs to be expanded and repaired many times to meet the use requirements, which not only wastes a lot of manpower and material resources, but also seriously affects the safe and efficient production of the mine. [0003] Affected by the adaptability of ...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): E21D15/10
Inventor 张农韩昌良李桂臣阚甲广王成梁国栋
Owner CHINA UNIV OF MINING & TECH
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