Karst ground collapse prediction and forecasting method based on karst water dynamics

A karst water and karst technology, applied in the field of forecasting, can solve the problems of complex calculation methods, such as the inability to make forecasts for several days or even less time, and achieve the effect of high operability

Pending Publication Date: 2019-09-06
SHANDONG UNIV OF SCI & TECH
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  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

Most of the above methods are applied in the macro region, but there are still some limitations. For example, the karst collapse prediction in the macro region is highly subjective in the selection of evaluation factors and weight assignment; or the calculation method is too complicated, or it needs to be calculated in advance. Pre-embedded optical cable, low generalization, not suitable for promotion and practical application, etc.
In addition, most of the above-mentioned methods are based on the analysis of geological conditions, and predict the range of areas where karst ground subsidence may occur. This range is usually relatively large, even

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  • Karst ground collapse prediction and forecasting method based on karst water dynamics
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  • Karst ground collapse prediction and forecasting method based on karst water dynamics

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Embodiment 1

[0035] First of all, through the research on the distribution area of ​​soil collapse, it is found that in the distribution area of ​​soil collapse, the loose soil is not too thick, and the failure of the soil cave roof arch corresponding to the size of the opening of the karst cave on the contact surface between the soluble rock and the soil occurs. Karst ground subsidence; when the thickness of the overlying soil in the karst cave is large enough to form a stable cave arch, the karst ground subsidence will not occur. Due to the strong destructibility of loose soil, the covered carbonate rock karst development area is the area where karst ground subsidence occurs most severely. Cavities are formed, which rapidly develop into ground subsidence. However, no matter what type of collapse occurs, the collapsed body will fall into the karst cave when it occurs, causing the karst water to be disturbed and the water level and water quality to change. Especially for overburden karst ...

Embodiment 2

[0049] In order to further illustrate the forecasting method provided by the present invention, the present embodiment is in a concealed limestone area with a large risk of karst ground subsidence of 2km × 2km, where the karst is developed and the loose deposits are distributed homogeneously and isotropically. The method of arranging observation holes at a certain distance in the vertical and horizontal directions establishes a water level and quality monitoring network and realizes real-time transmission of water levels. Water quality can also be detected through the online water quality monitoring system. - , SO 4 -2 , NO 3 - 、K + 、Na + , Ca 2+ , Mg 2+ content) and transmit in real time. Installing a water level monitor can determine the direction of karst water movement in real time and grasp the dynamics of water quality changes in real time.

[0050] In order to further illustrate the delineation of the subsidence risk area of ​​the karst ground, the principle fol...

Embodiment 3

[0057] In order to further illustrate the practicability and beneficial effects of the forecasting method provided by the present invention, a village is taken as an example to illustrate the application of the method. This area is located in the piedmont denudation plain area, the terrain in the area is open, the landform type is single, the terrain is relatively flat, the terrain is high in the north and low in the south, and slightly inclines towards the river. There have been geological disasters of karst collapse in this area. According to statistics, there were 17 ground collapses in the northwest of the village, and the collapse range was about 60,000m. 2 , there are 3 subsidences in the west, and the subsidence range is about 10000m 2 . The planar shape of the subsidence pits is mostly round-elliptical, mainly in the shape of wells or altars. The diameter of the pit mouth is generally 5-6m, the maximum is 10m, and the visible depth is 5-7m. A total of 50 landslides h...

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Abstract

The invention provides a karst ground collapse prediction and forecasting method based on karst water dynamics, and relates to the technical field of prediction and forecasting, capable of realizing short-time, small-range and high-precision prediction and forecasting in a karst ground collapse dangerous area. The method specifically includes the steps: establishing a water level and water qualitydynamic monitoring grid of karst water; and dynamically monitoring the karst water level, water quantity, turbidity, main chemical components and other indexes in real time, thus being able to combine the karst water movement direction determined by a water level line plane graph, and analyzing the karst ground collapse inoculation process through a water level and water quality joint tracing method, and accurately defining the possible collapse range in time according to the information. The karst ground collapse prediction and forecasting method by the invention is simple and effective, andhas an important practical value for improving the precision and accuracy of karst ground collapse prediction.

Description

technical field [0001] The invention relates to the technical field of prediction and forecasting, in particular to a short-term, high-precision karst ground subsidence prediction method based on karst water dynamics. Background technique [0002] Karst ground subsidence is a ground deformation phenomenon caused by karst action in karst areas. It is a karst geological phenomenon in which the rock and soil above the karst caves are deformed and destroyed under natural or human action, resulting in the formation of subsidence pits on the ground. The disaster is characterized by suddenness, concealment, and strong destructiveness, and it poses a serious threat to the safety of life, property, and infrastructure such as roads. Therefore, accurate prediction and forecast of karst ground subsidence has important economic and social values. [0003] The basic elements of karst ground subsidence are: karst caves are developed in the lower part of the soluble rock, and there are coll...

Claims

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Application Information

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IPC IPC(8): G06F17/50G06Q10/04G01D21/02
CPCG06Q10/04G01D21/02G06F30/20Y02A20/152
Inventor 高宗军邓清海王敏冯建国陈桥夏璐张春荣田红
Owner SHANDONG UNIV OF SCI & TECH
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