Coal measure strata stress distribution simulation device and method under multi-stage tectonic movement function

Abstract

The invention discloses a coal measure strata stress distribution simulation device under a multi-stage tectonic movement function. The coal measure strata stress distribution simulation device comprises a rock stratum simulating and fixing system, a tectonic power simulation system, a tectonic deformation control system, a pressurization system and an information collection testing and analyzing system, wherein multiple layers of rock strata are arranged in the rock stratum simulating and fixing system; the tectonic power simulation system applies longitudinal force and lateral force to the rock strata; the tectonic deformation control system is used for controlling the deformation of the rock strata to enable the rock strata to achieve an anticipative tectonic form; the pressurization system adopts a hydraulic system to provide power for the tectonic power simulation system and the tectonic deformation control system. The invention also discloses a coal measure strata stress distribution simulation method under the multi-stage tectonic movement function. Coal measure strata stress distribution characteristics and an evolution process thereof under an overlapping function of two-stage tectonic movement can be simulated, a scientific basis is provided for the stress distribution prediction of the coal measure strata of different tectonic positions. According to the device, the stresses of different tectonic positions above and below a fold neutral surface can be simulated.

Description

technical field [0001] The invention belongs to the technical field of coal-measure gas development simulation tests, and in particular relates to a stress distribution simulation device and method for coal-measure formations under the action of multi-phase tectonic movements. Background technique [0002] With the increase of coalbed methane mining depth, the heat of coal-measure gas exploration and development gradually rises. However, after the formation of coal-measure strata in my country, most of them have experienced multi-stage tectonic movements. The superposition of multi-stage tectonic movements has led to changes in stress distribution in a small area The complexity of stress conditions restricts the accuracy and effectiveness of permeability prediction, drilling-fracturing-drainage and other projects in the exploration and development of coal-measure gas. Therefore, accurate prediction of in-situ stress is an important task in the exploration and development of c...

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Problems solved by technology

[0004] This invention aims at the problem that the stress distribution characteristics of different layers and different structural parts cannot be accurately predicted after the multi-phase tectonic movement of the coal-measure strata. Provide a stress distribution simulation device and method for coal-measure strata under the action of multi-phase tectonic movements. The simulation device and method can not only simulate the horizontal stress of different rock formations and different structural parts in coal-measure strata after the superposition of two-phase tectonic movements, It can also simulate its evolution process; it can simulate the stress distribution and evolution characteristics of different structural parts when the coal-measure strata is above and below the fold neutral plane

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