Coal mining two-dimensional physical simulation experimental device using solid filling method and experimental method

Abstract

The invention discloses a coal mining two-dimensional physical simulation experimental device using a solid filling method and an experimental method, relating to the technical field of test or analysis of materials by measuring the chemical or physical properties of the materials. The experimental device comprises a two-dimensional physical simulation experimental table and multiple solid filling similar material molds, wherein rock physical models are stacked on the two-dimensional physical simulation experimental table; a simulation bracket is arranged in a coal mining layer of the rock physical models; the solid filling similar material molds are arranged in a goaf of the coal mining layer; pressure sensors are arranged on the simulation bracket and the solid filling similar material molds; and displacement monitoring points are formed in the rock physical models on the upper and lower sides of the goaf. The method is easy to operate and convenient to measure, and the compaction degree of the solid filling similar materials can be accurately set in advance.

Description

technical field [0001] The invention relates to the technical field of testing or analyzing materials by means of measuring their chemical or physical properties, in particular to a two-dimensional physical simulation experimental device and method for coal mining by solid filling method. Background technique [0002] Solid filling coal mining is to mix and fill one or more materials such as gangue, fly ash, slag, tailings, construction waste, soil, etc. into the space formed after mining to control the movement of surrounding rock and the strength of mine pressure. coal mining method. Solid filling coal mining has obvious effects on protecting surface engineering buildings and preventing roof and floor water inrush. It can consume a large amount of solid waste, cause less damage to the ecological environment, and cost less than other filling coal mining methods. Use more. [0003] Physical simulation experiment is a common method to study the movement of coal and rock lay...

AI Technical Summary

Problems solved by technology

In addition, affected by the movement of the roof beam during the actual coal mining process, it is difficult to achieve a 100% roof connection rate, and not all fillings require a high filling rate

In addition, in the process of pushing and pressing solids to fill similar materials, it may cause changes in the orientation and position of the pressure sensor, which will reduce the accuracy of the experiment.

Therefore, these simulation methods have certain limitations

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