Multi-gap combined geological unit seepage simulation material and preparation method thereof

Abstract

The invention belongs to the field of the hydrogeololgy subject, and relates to a multi-gap combined geological unit seepage simulation material capable of simulating the complex seepage characteristics of natural rock mass, and a preparation of the multi-gap combined geological unit seepage simulation material. The multi-gap combined geological unit seepage simulation material is obtained by using isotropic material blocks which can be independently and densely laid and are of a regular shape as base blocks, conducting seepage equivalent processing such as swabbing, drilled through hole sand filling and block seam sand filling on the base blocks, laying the base blocks flat and conducting piling layer by layer according to the advantage crack direction and / or the advantage dissolution pore direction of the development of natural rock mass, and arranging filter layers between the base blocks on the upper layer and the base blocks on the lower layer. Ordinary sintered clay bricks are suitable for being used as the base blocks, and by means of the combined material obtained in this way, dissolution pore flow is simulated through pipeline flow, crack flow is simulated through flat plate narrow seam flow, a water storage structure is simulated through pore media, and the seepage characteristics of natural rock mass which has anisotropy and has the structure characteristics such as pores, cracks and solution cracks can be simulated.

Description

technical field [0001] The invention relates to the subject field of hydrogeology, in particular to a material for simulating multi-void geological units such as karst passages, pores and fissures to study complex seepage characteristics of natural rock mass. Background technique [0002] Most of the natural rock masses have fractured and folded structures in the long geological history evolution process, forming a large number of pores, fissures and dissolved fissures, which are good channels for groundwater seepage. In addition to the great potential threats of water gushing, water inrush, and water permeation to the construction of tunnels and other underground projects, it also affects the stability and structural safety of tunnels. Therefore, it is very realistic to study the seepage characteristics of groundwater in complex geological units with multi-void combinations. significance. [0003] There are three main research methods for rock mass groundwater seepage and ...

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Problems solved by technology

However, using a single pore flow (Darcy's law), fracture flow (open cubic law) or dissolved pore flow (pipe flow formula) to describe the seepage characteristics of rock mass fails to reflect the complex void combination and spatial gradient of natural geological bodies. feature

Therefore, it is very difficult to complete the groundwater seepage characteristics of complex geological units by combining theoretical analysis with computer numerical simulation calculations.

[0006] However, if the aforementioned research is done by means of physical simulation testing, a large amount of rock mass material is required in the laboratory test, and the on-site retrieval is inconvenient due to technical and traffic constraints. Therefore, how to use a non-natural rock mass material with similar seepage characteristics Combining materials of rock mass to simulate complex geological units with pores, cracks and dissolved pores, reflecting the complex void combination and spatial gradient characteristics of natural geological bodies, so as to study its overall seepage characteristics, has become a very practical technology at present question

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