Tester and method for simulating stability of coal pillar group in dynamic load cutter post type residual mining area

Abstract

The invention discloses a tester and a method for simulating stability of a coal pillar group in a dynamic load cutter post type residual mining area. The tester comprises a bottom plate static load compensation system, a vertical dynamic load application system, a dynamic load measuring system, a coal pillar stress dynamic monitoring system, a coal pillar deformation monitoring system, a top plate static load compensation system and a plane experiment table. The upper part of the plane experiment table is provided with the top plate static load compensation system, the lower part of the planeexperiment table is provided with the bottom plate static load compensation system. The top plate static load compensation system comprises a top plate jack and a top plate static load control button, the bottom plate static load compensation system comprises a bottom plate jack and a bottom plate static load control button. The vertical dynamic load applying system comprises a gravity plate, a gravity plate lifting rod and a lifting control button. The method is capable of quantitatively researching the stability and deformation damage characteristics of the coal pillar group left in the cutter post type residual mining area under the action of different impact loads, and is capable of carrying out indoor researches by combining the width and distribution conditions of the coal pillar group in the specific coal mine cutter post type residual mining area and mechanical parameters of each rock stratum.

Description

technical field [0001] The invention discloses a tester and method for simulating the stability of a coal pillar group in a knife-pillar residual mining area under dynamic load, and relates to a tester for testing the stability of a coal pillar group in a knife-pillar residual mining area under the action of simulated dynamic load The method and the method belong to the field of coal mine experimental equipment. In particular, it relates to a test apparatus and method for quantitatively studying the stability and deformation and failure characteristics of a coal pillar group in a knife-pillar residual mining area under different impact loads. Background technique [0002] Coal resources have long dominated my country's energy consumption. However, with the massive mining of coal resources, the contradiction between the limited coal resources and the unlimited consumption demand is increasing. Due to historical and technical equipment reasons, in the initial stage of coal min...

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Problems solved by technology

[0003] The publication number CN106989944A discloses a three-dimensional similar simulation device and application method for the stability of a dynamic pressure roadway, including a test bench, two gang dynamic pressure loading systems, a bottom plate loading system and a third jack. There is a bottom plate loading system, a top plate loading system is set above the bottom plate loading system, and a supporting system composed of a first flexible tempered glass plate and a second tempered glass plate is set between the bottom plate loading system and the top plate loading system; two gang dynamic pressure loading systems It is installed symmet

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