Method for predicting, preventing and controlling earth surface residual movement and deformation caused by newly-built building in mine lot

Abstract

The invention provides a method for predicting, preventing and controlling earth surface residual movement and deformation caused by a newly-built building in an old mining area. The prediction method is based on a mining parameter, which is obtained by geophysical prospecting, of an old mining area by an EH4 conductivity imaging system controlled by taking a mining map or geological drilling as geophysical prospecting analysis before the building is newly built, a traditional strata displacement parameter in Chine and a result of leveling carried out to an earth surface strike line when the newly-built building is about to be built on the earth surface of the old mining area; prediction targets are earth surface residual sinking, earth surface residual tilting deformation, earth surface residual curvature deformation, earth surface residual horizontal movement and earth surface residual horizontal deformation. Problems that parameters are insufficient and new parameters are difficult to popularize when people predict at present are solved, a damage level of the earth surface newly-built building in the old mining area can be evaluated, and a foundation (old mining area) grouting implementation method capable of preventing and treating earth surface residual movement and deformation is adopted for the newly-built building in advance. The method comprises a technological process of goaf grouting engineering by earth, grouting materials, serous fluid ratios and the like.

Description

Technical field [0001] The invention belongs to the field of coal mining subsidence, and relates to a method for predicting and preventing residual movement and deformation of the ground surface caused by newly built buildings above the old mining area of ​​the coal mine. Background technique [0002] Coal mining causes large-scale surface subsidence, causing casualties, damage to urban buildings, lifeline systems and ecological environment, and threatening the safety of people's lives and properties. In 2000, the "Buildings, Water Bodies, Railways, and Main Shaft Coal Pillar Retention and Coal Mining Regulations" published by the Coal Industry Press stipulated that the ground surface movement starts from sinking 10 mm, and the sinking does not exceed 6 months in a row. It ends at 30 mm, and the duration of ground movement is T=2.5H 0 , where, the unit of T: days, generally the number of days in 3 to 5 years; H 0 is the average mining depth, unit: meter. However, foreign ...

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Problems solved by technology

However, at present, the code does not have a definition of residual mobile deformation and a prediction method for residual mobile deformation of the surface; c (x) has been discussed, but the predecessors still exist W c (x) The expression is difficult to accurately express the complex effects of overburden geological and mining factors due to too few parameters, and it is difficult to popularize due to the emergence of new parameters; especially, the predecessors did not apply the existing rock movement parameters in my country to carry out the residual tilting deformation of the surface i c (x), surface residual curvature deformation K c (x), surface residual horizontal movement U c (x), surface residual horizontal deformation ε c A comprehensive study of (x), since there is no i c (x), ε c (x), K c (x), but it is impossible to assess the damage level of new buildings on the surface of the old mining area according to the regulations, and it is impossible to take corresponding disaster prevention and control measures according to the damage level of the new buildings on the surface of the old mining area

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