A rapid evaluation method for dissolved seepage channels in formations rich in glauberite

An evaluation method and glauberite technology, applied in the field of engineering geological survey, can solve the problem of the lack of a systematic, comprehensive and complete survey and evaluation method for the dissolution and leakage channels of soluble rocks

Active Publication Date: 2019-04-02
CHINA HYDROELECTRIC ENGINEERING CONSULTING GROUP CHENGDU RESEARCH HYDROELECTRIC INVESTIGATION DESIGN AND INSTITUTE
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  • Description
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Problems solved by technology

[0004] At present, there is no systematic, comprehensive and complete survey and evaluation method for glauberite, which is an easy karst dissolution seepage channel.

Method used

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  • A rapid evaluation method for dissolved seepage channels in formations rich in glauberite
  • A rapid evaluation method for dissolved seepage channels in formations rich in glauberite
  • A rapid evaluation method for dissolved seepage channels in formations rich in glauberite

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Embodiment

[0058] Take the application of the solution of the present invention to a certain river improvement located in Ya'an City as an example. This channel mainly develops a set of red beds, and the lithology of the strata is silty mudstone, argillaceous siltstone, and mudstone interbedded with multiple layers of Glauber's salt in the Mesozoic Cretaceous Guankou Formation. About 3km long river has been dry for a long time.

[0059] Mainly adopt methods such as surface geological survey, connection test, geophysical high-density electrical test, down-the-hole drilling, etc., and establish a system evaluation system for the leakage channel through the application of the present invention. The on-site investigation only takes a few days, and the judgment can be made quickly and accurately. The plane distribution range of the seepage area is about 240m long along the river, of which the large flow cave area is about 20m long along the river, the maximum buried depth is about 24m, and th...

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Abstract

The invention relates to a technique of geological engineering exploration, and discloses a fast evaluation method of dissolution and leakage passages in strata rich in glauberite. The method is capable of quickly and precisely determining the horizontal distribution ranges, developing depth, scale and the like of the glauberite dissolution and leakage passages and providing reliable basic information for engineering processing. The method includes the steps of a, constructing a glauberite developing degree partition system; b, primarily judging the horizontal distribution ranges and leakage paths of leakage areas; c, detecting developing features of dissolution holes; d, setting a developing degree grading standard for the dissolution holes; e, determining the specific positions, shapes and scale of the leakage passages; f, dividing the leakage passages into a mass-flow hole area and a net-shaped hole leakage area. The fast evaluation method of the dissolution and leakage passages in the strata rich in glauberite is applicable to fast and precise reconnaissance and evaluation of glauberite leakage passages.

Description

technical field [0001] The invention relates to engineering geological survey technology, in particular to a rapid evaluation method for formation dissolution and seepage channels rich in glauberite. Background technique [0002] Glauber's salt is a special double salt. Its main components are sodium sulfate which is easily soluble in water and calcium sulfate which is slightly soluble in water. It has complex solubility characteristics. Studies have shown that the glauberite ground into powder is mixed with hydrochloric acid and water respectively, and after reacting with hydrochloric acid within 3 months, it finally dissolves 94% to 97%, and finally dissolves 30% to 70% when it meets water. It can be seen that the dissolution rate of glauberite is very fast, much higher than that of soluble rocks. [0003] In formations rich in glauberite, glauberite dissolves under the condition of groundwater infiltration, forming tiny dissolved pores or pores. With the further developm...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): G01V9/00
CPCG01V9/00
Inventor 马宏冯建明陈卫东游显云黎昌有徐旭
Owner CHINA HYDROELECTRIC ENGINEERING CONSULTING GROUP CHENGDU RESEARCH HYDROELECTRIC INVESTIGATION DESIGN AND INSTITUTE
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