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A Method for Judging the Influence Range of Sand Mining Goaf Based on the Principle of Grain Size Analysis in Sedimentology

A particle size analysis and influence range technology, applied in the field of engineering geological exploration, can solve problems such as engineering difficulties, no sand mining goaf judgment process, etc., and achieve the effects of reliable scientific basis, efficient judgment, and convenient operation.

Active Publication Date: 2022-03-18
SOUTHEAST UNIV
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Problems solved by technology

However, there is no unified judgment process for sand mining goafs at present, which brings difficulties to the actual engineering. At the same time, in actual engineering, a clearer judgment should be made on the scope of influence of special geological phenomena as soon as possible, in order to carry out special governance work. gain time

Method used

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  • A Method for Judging the Influence Range of Sand Mining Goaf Based on the Principle of Grain Size Analysis in Sedimentology
  • A Method for Judging the Influence Range of Sand Mining Goaf Based on the Principle of Grain Size Analysis in Sedimentology
  • A Method for Judging the Influence Range of Sand Mining Goaf Based on the Principle of Grain Size Analysis in Sedimentology

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Embodiment

[0049] According to the given judgment method, a specific case analysis is made to prove the validity of this application. The specific case is that the proposed bridge section of the 344 Provincial Highway Beijing-Hangzhou Grand Bridge is located in the goaf of the Quaternary sand layer. The specific steps of the invention to determine the scope of influence of the sand mining goaf are as follows:

[0050] (1) On the basis of engineering survey and drilling, select 9-1 layer soil samples of 1-1′ section ( figure 2 ) to carry out the sieving experiment, and measure the content data of the particle size components of each soil sample.

[0051] ⑵Convert the particle size value into Φ format, among which the sieved part smaller than 62 microns is all treated as 6Φ, as shown in Table 1 for arrangement.

[0052] Table 1 Statistical table of mass fraction greater than a certain particle size (Φ)

[0053]

[0054] (3) Draw a particle size cumulative frequency map according to t...

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Abstract

The invention relates to a method for judging the range of influence of sand mining goafs based on the grain size analysis principle in sedimentology. Using the grain size analysis method in sedimentology to comprehensively analyze the particle size composition characteristics and laws of the sand layer soil samples, and give the distribution limit, it is judged that the source of the sand layer soil samples belongs to the unmined sand area, sand mining area, etc. The disturbed area is still a sand mining area, and then the distribution and influence range of the sand mining goaf can be inferred; the present invention can directly use the particle component data measured by engineering survey drilling sampling to analyze, based on the particle size analysis data, combined with the principle of sedimentary environment type discrimination, Comprehensive application of these results can quickly determine the scope of influence of sand mining goaf, which has the advantages of convenient operation and high efficiency of discrimination, and provides a more reliable scientific basis for carrying out special governance work, which has practical engineering application value.

Description

technical field [0001] The invention relates to a method for judging the influence range of a sand mining goaf based on the grain size analysis principle in sedimentology, and belongs to the technical field of engineering geological survey. Background technique [0002] In the survey and design of highway bridges, the determination of the boundary and influence range of the goaf, the evaluation of the deformation of the goaf and the stability of the foundation, and the formulation of the technical plan for the treatment of the gob directly affect the selection, optimization and engineering of the whole plan. Investment estimates. The safety of highway bridges not only involves huge engineering costs, but also involves the safe operation of the overall road and personal safety. It is a technical difficulty that must be solved in road construction to scientifically and rationally analyze the foundation evaluation and treatment methods in the goaf. The existence of gobs plays...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): G01N15/02
CPCG01N15/02
Inventor 方磊雷丁琳
Owner SOUTHEAST UNIV
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