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Sandstone stratum vertical shaft freezing construction safety monitoring method

A technology for safety monitoring and formation, applied in the fields of instruments, data processing applications, resources, etc., can solve the problems of insufficient construction experience, inability to freeze wall stability, and formation of regular average temperature wellbore tunneling sections, so as to reduce well construction costs and improve The effect of construction speed

Inactive Publication Date: 2016-06-22
XIAN UNIV OF SCI & TECH
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Problems solved by technology

When the freezing method is used to excavate the wellbore in the deep sandstone formation of the Luohe Formation, due to the lack of specific construction experience, it is impossible to determine the stability of the frozen wall, the formation law, the average temperature and the height of the shaft excavation section through engineering analogy.

Method used

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  • Sandstone stratum vertical shaft freezing construction safety monitoring method
  • Sandstone stratum vertical shaft freezing construction safety monitoring method
  • Sandstone stratum vertical shaft freezing construction safety monitoring method

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Embodiment

[0089] Under the influence of various natural factors and human factors, the factors affecting the safety of the frozen wall of the vertical shaft in the sandstone formation of the Luohe Formation during the construction process are significantly fuzzy and uncertain, and it is difficult to quantify them. The fuzzy comprehensive evaluation method converts qualitative description into quantitative calculation through unified numerical processing of evaluation indicators, eliminates the influence of qualitative judgment and expert subjective arbitrariness, and better considers the interaction and effect of various qualitative and quantitative evaluation indicators .

[0090] (1) Establishment of risk factor set

[0091] When using the method of fuzzy comprehensive evaluation to evaluate the construction safety of the vertical well frozen wall in the sandstone formation of the Luohe Formation, the selected construction safety influencing factors have certain universality and objec...

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Abstract

The invention discloses a sandstone stratum vertical shaft freezing construction safety monitoring method, including the steps of: S1. determination of a factor set; S2. determination of an evaluation set; S3. establishment of a weight set; S4. single factor fuzzy comprehensive evaluation; S5. Determination of a fuzzy composition operator; S6. fuzzy comprehensive judgment; and S7. evaluation index analysis. On the basis of analysis of a common safety evaluation method for engineering construction, a fuzzy mathematical theory is adopted, main risk influence factors such as freezing rock strength, freezing wall thickness, freezing temperature, shaft excavation section height, underground water seepage, freezing stratum pressure, freezing pipe deflection and power failure time are considered, and a Luohe River formation sandstone stratum vertical shaft freezing construction safety comprehensive judgment method is proposed, which is of certain theoretical and practical significance to aspects of reducing shaft building cost, improving construction speed and enriching freezing shaft-sinking theories of our country.

Description

technical field [0001] The invention relates to the field of vertical shaft freezing construction in sandstone formation, in particular to a safety monitoring method for vertical shaft freezing construction in sandstone formation. Background technique [0002] With the further improvement of social and economic development and people's living standards, my country's energy demand is increasing year by year. Traditional energy is not only related to the long-term development of the national economy, but also involves the political security of the country. At present, my country's coal resources still account for about 60% of the non-recoverable energy consumption structure, and this situation will not change fundamentally in a certain period of time in the future. Although my country has adopted a new environmental protection policy in order to control environmental pollution, and the production of raw coal will be compressed and controlled to a certain extent, the possibili...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): G06Q10/06G06Q50/02
CPCG06Q10/0635G06Q50/02
Inventor 卫建军于远祥王兵强
Owner XIAN UNIV OF SCI & TECH
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