Karst fissure water detection system and method

Abstract

The present invention discloses a karst fissure water detection system and method. According to the karst fissure water detection system and method, a pumping and injection well is drilled at the center of a region to be detected, geological boreholes are drilled with the pumping and injection well as a center; water is pumped from the pumping and injection well, water pumping time, pumped water quantity as well as the water level changes of the pumping and injection well and the geological boreholes are recorded; salinity sensors and water temperature sensors are distributed, and the salinity sensors and the water temperature sensors are connected into a computer through a data acquisition module so as to acquire the initial salinity and water temperature of karst fissure water; the salinity change of the karst fissure water in each borehole is acquired in real time until values acquired by some salinity sensors obviously changes, and hot water is injected into the pumping and injection well, and the temperature change of the karst fissure water in each borehole is acquired in real time until values acquired by some water temperature sensors obviously changes; and the permeability, flow direction, flow rate and main water channels of the karst fissure water are analyzed.

Description

Technical field [0001] The invention relates to a karst fissure water detection system and method, and belongs to the technical field of geotechnical engineering investigation. Background technique [0002] For underground engineering construction in areas with developed karst fissures, it is necessary to consider the impact of karst fissure water on underground engineering. In addition to the topography and topography, the karst fissure water is also controlled by the geological structure, so its migration generally has obvious heterogeneity. The karst fissure water has different forms of karst, and the fissures penetrate vertically and horizontally, so there are many leakage and water outlet points. Most of the karst fissure water is connected to the replenishment source with abundant water resources, forming an intricate underground hydraulic system. During the construction of underground engineering, the influx of karst fissure water will bring great risks to the underground...

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Problems solved by technology

[0003] At present, although some scholars have done a lot of research on karst fissures, such as patent document CN102866417A discloses a kind of underground karst cave seismic cross-hole CT detection and tomographic imaging device and method, the device and method can quickly and effectively detect underground karst caves, but It cannot reflect the water flow in the underground karst cave, and the cost is expensive and the construction period is long; the patent document CN102426384A discloses a method for detecting underground goaf and karst distribution. Effective detection of goaf and karst distribution, but cannot reflect the water flow in goaf and karst areas

[0004] At present, some scholars have also done a lot of research on the migration of karst groundwater. For example, patent document CN104808258A discloses a method of using sugar as a tracer to measure the migration path of karst groundwater. This method has high sensitivity and low cost, and can realize The detection of flow velocity and flow direction of karst groundwater cannot reflect the distribution of karst fissures; patent document CN98114214.1 discloses a chemical tracer inter-well tracer measurement technology. In the practical application of this technology in karst areas, there are Poor stability, unstable detection accuracy and other shortcomings, and can not reflect the distribution of karst fractures

[0005] It can be seen that for the detection of the distribution of karst fissures and the movement of internal water flow, there is no better method proposed so far.

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