Treating method for geological crushed zone of underground water sealing cavern storage cavern area

Abstract

The invention relates to a treating method for a geological crushed zone of an underground water sealing cavern storage cavern area. The treating method comprises the following steps that the characteristics of the geological crushed zone are determined by combining with data of the geology and exploration holes; grouting grout, the technology and the termination standard are determined, through grouting holes, pre-grouting is conducted on the geological crushed zone and rock-soil bodies around the geological crushed zone, a water-stop curtain is formed, the crushed zone is reinforced, and grouting effect detection is conducted; blasting excavation is conducted till the geological crushed zone is exposed, and then the rock-soil bodies, away from the periphery of a cavern within a certain range, of the crushed zone are excavated out and replaced with concrete for filling; the contact surfaces between the concrete and the rock bodies as well as between the concrete are grouted, and the grout, the technology, the termination standard and the effect detection standard which are the same as those of pre-grouting can be adopted; and after construction of a supporting structure is completed, a surrounding rock deformation detecting part is arranged on the surface layer of the original geological crushed zone, and whether a shotcrete and bolt support needs to be reinforced or not is judged. According to the treating method, the difficult problems of water plugging and reinforcing of the geological crushed zone of the storage cavern area can be solved, the step is simple, construction is easy and convenient, the investment cost is saved, and the treating time is short.

Description

Technical field [0001] The invention relates to the technical fields of underground water-sealed cavern storage technology and geological fracture zone treatment in underground engineering, in particular to a method for processing the geological fracture zone in the underground water-sealed cavern storage area. Background technique [0002] Faults and fracture zones are common undesirable geological phenomena in the process of cavern excavation. In most cases, the fault fracture zone has the characteristics of low strength, easy deformation, large water permeability, and poor water resistance, which have significant differences in the physical and mechanical properties of the rock masses on both sides. For the storage area of ​​underground water-sealed caverns, the main technical problems caused by the broken zone are the reduction of the water sealing effect of the water curtain system, the leakage of oil and gas along the broken zone, and the collapse of rock and soil in the br...

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Problems solved by technology

[0005] The purpose of the present invention is to provide a treatment method for the geological fracture zone in the underground water-sealed cavern storage area in order to overcome the above-mentioned defects in the prior art, which can overcome the water blocking sealing and reinforcement stability that are difficult to guarantee in the existing geological fracture zone treatment method problems, so as to meet the needs of underground water-sealed cavern engineering construction

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