Mine goaf deformation and stability evaluation method based on Bouguer gravity anomaly

Abstract

The invention discloses a mine goaf deformation and stability evaluation method based on Bouguer gravity anomaly. The mine goaf deformation and stability evaluation method comprises a step1, arrangement of relative gravimeter observation points; a step2, arrangement of base points; a step3, erecting of gravimeters and absolute gravimeters; a step 4, acquisition of relative gravity observation values and absolute gravity observation values; a step 5, the acquisition of the deformation amounts of the relative gravity observation points; a step 6, drafting of a relative gravity observation point deflection curve and acquisition of stable deformation amounts. The mine goaf deformation and stability evaluation method is advantageous in that the steps are simple, a design is reasonable, costs are low, and use operation is convenient; by adopting the Bouguer gravity anomaly, the deformation amounts of the mine goaf is monitored, and monitoring results are accurate; the stability of the mine goaf is evaluated according to the deformation amounts of the mine goaf, and the stable deformation amounts of the mine goaf are acquired, and practicability is strong.

Description

technical field [0001] The invention belongs to the technical field of mine engineering, and in particular relates to a deformation and stability evaluation method of a mine goaf based on a Bouguer gravity anomaly. Background technique [0002] Mined-out areas in mines refer to the hollow areas between underground layers left after a series of artificial mining of underground minerals. The natural rock mass is originally in a state of natural stress balance, but due to the development and mining of mines, various spaces will inevitably be excavated inside the rock mass, such as roadways, stopes, etc., which will inevitably destroy the underground rock layer in the mining area. The stress balance produces secondary stress-strain effects. It is precisely because of this secondary stress-strain effect that the surrounding rock structure in the goaf of the mine is deformed, and even the stress balance structure is destroyed and moved until the structural stress balance of the r...

AI Technical Summary

Problems solved by technology

The main defect of the current method is that these studies are based on specific experiments, and the research methods and conclusions mainly rely on past experience, and the focus of these methods is generally on the geological problems caused by the deformation of the mine goaf. The evaluation of disasters ignores the observation of the overall deformation process and change law of the mine goaf from the mining stage to the post-mining vacant deformation stage.

[0010] Nowadays, there is no method to evaluate the stability of the mine goaf. It cannot comprehensively and effectively monitor the deformation of the mine goaf. Change law and characteristics of goaf

It can be seen from the above that using the traditional deformation monitoring method, due to its inability to avoid its own defects, the deformation monitoring deviates from the actual project, resulting in a large error in the stability assessment of the mine goaf, which cannot meet the needs of the mine goaf. Engineering Accuracy Requirements

Images