drilling water soluble salt mine mining subsidence InSAR prediction method

Abstract

The invention provides a drilling water soluble salt mine mining subsidence InSAR prediction method, which comprises the following steps: inverting the surface time sequence settlement of a salt minearea by using a time sequence InSAR technology, and obtaining a radar line-of-sight direction time sequence deformation quantity; extracting reliable deformation sample points near the drilling layoutposition; constructing a traditional static probability integral method model; calculating the settling volume of the high-coherence point in the vertical direction; utilizing unknown parameters of agenetic algorithm estimation model to construct a Weibull time function dynamic probability integral model, substituting all parameter result values obtained through calculation into the Weibull timefunction dynamic probability integral model, the settlement amount of all point positions at any time is calculated, and predicting a mining area time sequence deformation field. The defect that a traditional probability integral method model is mostly applied to a coal mine area and limited to a static sinking basin to mine subsidence prediction is overcome, the application space of the InSAR technology in mining area subsidence prediction is widened, and the ecological environment and production safety of the drilling water soluble rock salt mine are guaranteed.

Description

technical field [0001] The invention relates to the technical field of preventing salt mining subsidence, in particular to an InSAR prediction method for drilling water-soluble salt mining subsidence. Background technique [0002] my country is rich in rock salt mineral resources, of which more than 90% of rock salt is mined by drilling water-soluble method, that is, injecting solvent through drilling, dissolving the chamber of the ore layer, generating brine rich in mined minerals, and then extracting it from the drilling. In mining, because multi-well dissolution cavities are connected, two or more wells are usually mined at the same time. The water-soluble mining method is different from the traditional coal mine roadway mining. Traditional coal mines mainly adopt the directional advancement method of underground mining, while the water-soluble mining method is multi-directional, and its mining depth is greater than that of coal mines. Due to the two factors of brine dis...

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Problems solved by technology

[0004] The purpose of the present invention is to provide an InSAR prediction method for drilling subsidence in water-soluble salt mines, so as to solve the technical problems that the current monitoring and prediction of salt mine subsidence is not accurate enough and easily produces safety hazards

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