Collaborative dynamic prediction method for overlying strata and surface subsidence induced by coal mining

Abstract

The invention relates to a collaborative dynamic prediction method for overlying strata and surface subsidence induced by coal mining. The method comprises the following five steps: mining area working face geological parameter acquisition, prediction parameter determination based on a probability integral method, determination of a time sequence time function model based on an actually measured maximum sinking point, final surface movement deformation, dynamic prediction and final overlying strata internal movement deformation, dynamic prediction and the like. On one hand, the system is simple in construction structure, convenient in data acquisition and high in efficiency and precision, and can effectively improve accurate and continuous prediction of various complex deformation data ofoverlying strata in an underground resource extraction mining area; on the other hand, the efficient data calculation capability is realized; the prediction precision of the overlying strata in the underground resource extraction mining area is improved; in addition, the overlying strata deformation and settlement trend at any position in the range of the mining area can be accurately pre-judged according to existing data, the monitoring precision and efficiency of mining area settlement operation are improved, and meanwhile a reliable reference basis can be provided for mining area construction planning and mining area follow-up repair and utilization.

Description

technical field [0001] The invention relates to a dynamic prediction method of surface subsidence, specifically a method for cooperative dynamic prediction of overlying rock and surface subsidence induced by coal mining. Background technique [0002] When a large number of underground resources such as coal seams are mined and mined for a long time, the original stress structure of the rock stratum will be damaged, resulting in deformations such as caving, breaking, bending, sinking, fracture, layer separation, and movement of the overlying rock, and As a result, deformations such as subsidence, fracture, and subsidence are caused on the surface, causing serious damage to surface structures, buildings on the surface, water bodies, etc., and causing great impact and safety hazards on industrial and agricultural production, commercial activities, and daily life. For this problem, the continuous prediction of settlement and other situations is mainly carried out by using the tr...

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Problems solved by technology

[0002] When a large number of underground resources such as coal seams are mined and mined for a long time, the original stress structure of the strata will be damaged, resulting in deformations such as caving, breaking, bending, sinking, fracture, separation, and movement of the overlying strata, and As a result, deformations such as subsidence, fracture, and subsidence are caused on the surface, causing serious damage to surface structures, buildings on the surface, water bodies, etc., and causing great impact and safety hazards on industrial and agricultural production, commercial activities, and daily life. For this problem, at present, the continuous prediction of settlement and other conditions is mainly carried out by using the transmission leveling method. Although it can meet the needs of use to a certain extent, on the one hand, there are low monitoring efficiency, high operation difficulty and high cost, and on the other hand, the monitoring operation Only the data after subsidence can be summarized, and it is impossible to accurately predict the overall settlement and deformation of the mining area or underground resource mining range. The role of guiding the surface to carry out activities such as industrial and agricultural production and construction is relatively small, and cannot effectively meet the needs of actual work

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