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Local excavation pre-supporting raise boring technology

A local excavation and pre-support technology, applied in drilling equipment, wellbore lining, shaft equipment, etc., can solve the problems of instability, weak bedrock, sensitive structures such as uneven settlement, and reduce operating time and labor. The effect of strength and safety improvement

Active Publication Date: 2014-06-04
BEIJING CHINA COAL MINE ENG CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0003] In addition, the prior art raising drilling process cannot be applied to the following conditions: (1) the bedrock at the upper part of the raising well is weak, weathered and unstable, and it is difficult to support the dead weight of the raising drilling machine and the pulling force of the working face when drilling with the drill bit; 2) The upper stratum has fans, air ducts, safety passages and other structures that are sensitive to uneven surface settlement

Method used

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  • Local excavation pre-supporting raise boring technology
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  • Local excavation pre-supporting raise boring technology

Examples

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Embodiment 1

[0029] Such as Figure 1 to Figure 3 As shown, a kind of local excavation pre-supporting raising shaft drilling technology of the present embodiment is carried out auxiliary return air shaft raising shaft construction test in Wangtaipu Coal Mine, Jincheng City, Shanxi Province, including the following steps:

[0030] (a) Geological data analysis

[0031] Analyze the geological data provided by the geology and design departments, drill engineering inspection holes near the wellbore before construction, and collect the geological and hydrological conditions of the nearby wellbore or other basic engineering and water wells. When the thickness of the formation is within 30m, the lower rock is stable, and the water consumption does not exceed 20m 2 / h situation].

[0032] (b) Ground excavation

[0033] Use manual excavation or small excavator to excavate, put the gangue into the bucket, hoist it to the ground for stacking, and transport it out of the site; use shotcrete as the p...

Embodiment 2

[0049] Such as Figure 1 to Figure 3 As shown, a kind of local excavation pre-supporting raising shaft drilling technology in this embodiment is carried out in the Lanhua Baoxin Coal Mine in Guxian County, Shanxi Province to carry out the auxiliary return air shaft raising shaft construction test, including the following steps:

[0050] (a) Geological data analysis

[0051] Analyze the geological data provided by the geology and design department, according to the geological histogram described by the engineering inspection hole near the shaft, drill the engineering inspection hole near the shaft before construction, and collect the geological and hydrological conditions of the adjacent shaft or other basic engineering and water wells, When the thickness of the soil or unstable stratum is within 30m, the underlying rock is stable, and the water consumption does not exceed 20m 2 / h.

[0052] (b) Ground excavation

[0053] Use manual excavation or small excavator excavation,...

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Abstract

The invention discloses a local excavation pre-supporting raise boring technology which includes the technological steps of (a) analyzing geological data, (b) excavating stratums, (c) backfilling concrete, (d) installing a raise boring machine, (e) conducting guide hole drilling, (f) conducting reaming drilling, and (g) conducting well wall supporting. According to the local excavation pre-supporting raise boring technology, excavation, replacement, reinforcement and pre-supporting are carried out on weak stratums in advance before the raise boring machine enters the site to reinforce the foundation bearing capacity or control inhomogeneous deformation of the earth surface, and the raise boring can be safely finished. The local excavation pre-supporting raise boring technology is suitable for the structure that bed rock on the upper portion of a well is weak, efflorescent, instable and incapable of supporting the dead load of the raise boring machine and the pressure on the stratum during reaming drilling, or the structure with a fan, an air flue, a safety channel and like which are sensitive to earth surface differential sedimentation on the stratum on the upper portion.

Description

technical field [0001] The invention relates to a drilling technology, in particular to a local excavation pre-supporting raising well drilling technology. Background technique [0002] Existing mine construction projects in rocky strata mostly use the common method of sinking construction, which requires workers to go down to the narrow and narrow excavation working face hundreds of meters deep, use drilling rigs to drill blast holes, load explosives, blast the working face, and break the blasting. The rock is lifted to the ground through the bucket, the working surface is drained, and then supports and other operations are performed. The level of mechanization is low, the labor input is high, the working environment is difficult, the safety conditions are poor, accidents occur frequently, and the blasting disturbs the surrounding rock greatly, the stress of the original rock changes greatly, and the support is difficult. Among them, rock loading, drainage and other proces...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): E21B15/00E21B21/01E21D11/10
Inventor 刘志强谭昊姜浩亮荆国业李英全王晓健程守业
Owner BEIJING CHINA COAL MINE ENG CO LTD
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