A simulation test method for mining failure of the bottom floor of mine working face

Abstract

The invention belongs to the technical field of coal mine working face floor damage simulating experiments and relates to a mine working face floor mining damage simulating experiment method. The method comprises, firstly, preparing testing rocks and then testing mine working face floor mining damage simulating experiments; secondly, during the testing process, performing data monitoring and collection, monitoring the fracture development of the testing rocks and monitoring the fracture development depth and the occurrence characteristics of rock samples; lastly, on the basis of the mechanical properties of the testing rocks, performing mining damage digital simulation analysis, computing the stress distribution characterizes of mining floors, analyzing the elastoplasticity partitions of the mining floors, comparing with stress data collected during the simulating experiments, and analyzing the damage mechanism of the mining floors. Devices utilized in the mine working face floor mining damage simulating experiment method are simple in structure, accurate in monitoring data, simple in testing method and convenient to operate and solves the problem of water inrush of existing floors due to mine working face mining damage.

Description

Technical field: [0001] The invention belongs to the technical field of damage simulation test of the bottom plate of a coal mine working face, and relates to a mining damage simulation test method for the bottom plate of a mine working face. Background technique: [0002] At present, with the continuous deepening of coal seam mining, the geological structure and hydrogeology are becoming more and more complex, and the depth of damage to the floor caused by mine pressure and mining stress is increasing. Mining water inrush has increasingly become a major threat to mine water hazards. China began to study the law of floor water inrush in the 1960s. At that time, it noticed the application of the theory of relative aquitards in Hungary. During the war, represented by the Xi’an Exploration Branch of the General Academy of Coal Science and Technology, it was proposed to use the water inrush coefficient as the standard for predicting whether the floor water inrush or not; The th...

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Problems solved by technology

Therefore, in combination with the current status of coal mining technology, a mining failure simulation test device and method for the mine working face floor is developed, which can test and simulate the mining failure behavior of the floor, and combine rock mechanics tests, damage-fracture mechanics theory, numerical values Simulation calculations and other means reveal the mining failure mechanism of the floor and solve the current problem of water inrush on the floor damaged by mining

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