Exploring method for bedrock fissure underground water system flow net

Abstract

The invention discloses an exploring method for a bedrock fissure underground water system flow net. According to the exploring method, on the basis of hydrogeological exploration of a bedrock area, piezometric heads after one-by-one footage per round trip of all drilling holes are measured while well drilling is conducted, observing data of piezometric head values of different depths in the exploratory holes are obtained, then the underground water flow net is drawn, and the runoff intensity of underground water of different depths is analyzed and calculated. According to the exploring method, the actually measured head values of the different depths in the drilled holes are taken as the basis, artificial generalization does not need to be conducted on the geological conditions, the calculation error is avoided, the errors of numerical calculation or indoor experiments in the past are eliminated completely, precision is reliable, the obtained result conforms to the field actual situation, and scientificity is achieved; and in addition, by utilizing the exploring method, water level observation can be carried out with the help of carried-out geological drilling, or hydrogeologicaldrilling work or engineering geological drilling work, and the situation that a special underwater flow net is put in for exploration is not needed, so that the time is saved, the efficiency is improved, and high technological economy is achieved.

Description

technical field [0001] The invention relates to the field of groundwater science and engineering technology, in particular to a method for exploring the flow network of a fissure groundwater system in a brittle bedrock formation. Background technique [0002] Human life and production are inseparable from water resources. The large-scale exploitation and utilization of groundwater and the treatment of many hydrogeological problems often require the identification of groundwater seepage field characteristics and the drawing of regional groundwater system flow network diagrams to solve these problems. Traditional Groundwater System Flow Nets Figure 1 Generally, the schematic diagrams are drawn by means of numerical simulation, analytical solution, or indoor experiments. The existing methods not only need to invest a lot of exploration work to obtain relevant data, but also the drawn flow network diagram is only a schematic diagram with errors from the actual situation. . [...

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Problems solved by technology

[0003] There are main defects: first, the numerical simulation and analytical method are obtained by solving the generalized hydrogeological conditions, and the hydrogeological parameters necessary for calculating the flow network are themselves calculated values, and there are often orders of magnitude errors, so the flow network obtained by theoretical calculation It is only a schematic diagram, and there are great uncertainties; the second indoor experiment is restricted by the time scale and spatial scale, and the scale effect of the indoor experimental method is huge, especially the indoor physical experiment, which is currently unable to simulate the heterogeneous fracture water content in the field system, so the indoor experiment method is divorced from the actual conditions of nature

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