Three-dimensional geological survey testing method of deep portion crustal stress based on loading monitoring data

Abstract

The invention relates to a three-dimensional geological survey testing method of deep portion crustal stress based on loading monitoring data. Through the sequential and special step design of a deep portion crustal stress three-dimensional geological sensing measurement, loading monitoring data collection and survey and testing, and through the special optimization of related parameters, the method overcomes the defects of a traditional hydraulic fracturing and a deep hole trepanning geostress survey technique. The method can carry out measurement with a drill in a production process or in an exploratory boring process, does not need to drill dedicatedly for the geostress survey, and can supply a large amount of data for the analysis of the crustal stress field at the beginning of a project. The three-dimensional geological survey testing method of the deep portion crustal stress based on the loading monitoring data can deal with the rock mass of different geological deep portion under high crustal stress, high groundwater pressure, high ground temperature and other complicated conditions quite well, and has good engineering application value.

Description

technical field [0001] The invention belongs to the technical field of geological energy, mineral resources and geotechnical engineering survey, and more specifically relates to a three-dimensional geological survey and testing method for deep ground stress based on load monitoring data. Background technique [0002] In-situ stress refers to the stress on the underground coal strata, mainly including the self-gravity stress caused by the self-weight of the overlying strata and the tectonic stress caused by the geological structure. Self-gravity stress σv=γZ, γ is the specific gravity of the overlying coal strata, and Z is the vertical depth. [0003] During the underground mining of coal and other resources, mining activities destroy the original stress balance state of coal and rock, causing stress redistribution around the mining space. Therefore, the stress of coal and rock mass around the mining space also includes the mining stress. Around the stope and mining roadway...

AI Technical Summary

Problems solved by technology

In the deep hole above 1000m, it takes a very long time to complete a drilling, and it takes even more time when sampling drilling.