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Upper-water-permeable lower-water-resistible type cap rock collapse cause experimental device

An experimental device and cap layer technology, which is applied in the field of experimental devices for the causes of collapse of upper and lower resistance type cap layers, can solve the problems of high cost, unintuitiveness, long time consumption, etc., and achieve the effects of low cost, intuitive phenomenon and convenient movement.

Inactive Publication Date: 2018-11-23
CHENGDU UNIVERSITY OF TECHNOLOGY
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AI Technical Summary

Problems solved by technology

[0009] Karst collapse usually has very strong concealment and suddenness, which brings great difficulties to people's understanding of karst collapse and researchers' analysis of the mechanism of different types of karst collapse, and it is time-consuming and costly. , unintuitive and other shortcomings

Method used

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  • Upper-water-permeable lower-water-resistible type cap rock collapse cause experimental device
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  • Upper-water-permeable lower-water-resistible type cap rock collapse cause experimental device

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Embodiment Construction

[0035] The present invention will be further described below in conjunction with the accompanying drawings and embodiments.

[0036] Such as Figure 3 ~ Figure 7 As shown, the present invention includes a geological body simulation box 1, a measurement system and an injection and drainage system.

[0037] The geological body simulation box 1 is equipped with a horizontally placed partition 2 in its box. The partition 2 divides the geological body simulation box 1 into two parts. Box 11, the lower half area is the karst cave simulation box 12 for simulating the karst caves developed in soluble rocks and karst rocks; the middle part of the partition 2 is provided with holes for simulating the opening of karst caves; Upper transparent and lower resistive caprock, the upper layer of the upper transparent and lower resistive caprock is a relatively water-permeable layer 13, and the lower layer is a relatively water-resistant layer 14, and a water injection well 15 is set in the re...

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Abstract

The invention relates to an upper-water-permeable lower-water-resistible type cap rock collapse cause experimental device and belongs to the karst collapse research technical field. With the upper-water-permeable lower-water-resistible type cap rock collapse cause experimental device of the invention adopted, the whole process of the cause of the collapse of upper-water-permeable lower-water-resistible karst triggered by the rise and fall of groundwater level can be directly expressed, and the variation law of the intensity of pressure in a karst cave and the formation and expansion of a soilcave which are caused by the erosion of lower layer soil by groundwater can be visually showed, and related testing and parameter determination can be performed. Experimental data and experimental rules obtained by the device of the invention are very useful for analyzing and studying essential relationships between the groundwater level and karst collapse geological disasters, especially, a new technical means is provided for studying seepage deformation generated in the variation process of the groundwater level of the karst cave and karst collapse caused by the formation and expansion of the soil cave which are caused by the erosion of the lower layer soil; the development process of such karst collapse is reproduced; the formation mechanism of the karst collapse is revealed; and a certain reference value is provided for work such as the establishment of a karst collapse prevention, disaster reduction and early warning system.

Description

technical field [0001] The invention relates to an experimental device for the cause of collapse of an upper-permeable and lower-resistance caprock, which belongs to the technical field of karst collapse research. Background technique [0002] Karst collapse refers to the phenomenon of collapse and failure of the overlying layer soil in the karst cave with openings in the karst development zone under the action of internal static force and external dynamic conditions. It has always been one of the hotly discussed topics. The area of ​​karst areas in my country is 3.63 million km 2 , accounting for more than 1 / 3 of the total land area of ​​the country, among which the karst area of ​​Yunnan, Guizhou, Sichuan, Guangxi, Hunan, Chongqing, Hubei, Guangdong and other provinces (cities, districts) reached 1.055 million km 2 , is one of the countries with the most developed karst in the world. The soluble rock mountainous areas in southern my country have deep valleys, abundant ra...

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): G09B23/40
CPCG09B23/40
Inventor 肖先煊许模夏强蔡国军郭健杜锋
Owner CHENGDU UNIVERSITY OF TECHNOLOGY
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