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

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...

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

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