Coal bed overburden strata broken coal and rock mass gas transport and extraction experiment system

Abstract

The invention discloses a coal bed overburden strata broken coal and rock mass gas transport and extraction experiment system which comprises four static servo hydraulic control systems and a model base, wherein the model base comprises a bottom plate, front, rear, left and right side walls on the bottom plate, and a top plate, which define a cubic space filled with simulation materials; an air vent pipe is arranged on the rear side wall; the four static servo hydraulic control systems are connected with lifting jacks on the bottom plate, the top plate, the left side wall and the right side wall, respectively; a steel wire corrugated pipe is arranged in the model base; a model base supporting device is arranged at the bottom of the model base. The limitation of conventional computer numerical simulation for solving a discontinuous large deformation problem is eliminated, and a phenomenon that stratum movement caused by mining in a mining process under specific conditions cannot be completely and accurately reflected is avoided. Meanwhile, a gas transport law and a gas extraction law in a pressure relief area can be tested.

Description

technical field [0001] The invention relates to an experimental system for gas migration and drainage of coal seam overburden fractured coal and rock mass. Background technique [0002] With the development of society, more and more mineral resources under complex geological conditions have been explored and developed. Due to the extremely complex geological conditions, the mechanical problems in the mining process of ore deposits are very important for the reasonable selection of mining methods and structural parameters and the improvement of mining intensity. , rational use of mineral resources, ensuring the safety of workers and ultimately improving the economic benefits of mining are particularly important. [0003] In recent years, the widespread application of electronic computers in mineral deposit mining has provided an effective means to solve the above-mentioned complex problems. For example, analysis engineering software has been widely used in the mining industry...

AI Technical Summary

Problems solved by technology

However, due to the complex mining geological conditions, mining problems are mostly large deformation and discontinuous deformation problems, and the current computer numerical simulation has limitations in solving the problem of discontinuous large deformation, and cannot completely and accurately reflect the specific conditions during the mining process. movement of rock

[0004] Therefore, the similar simulation experiment used by the technicians can better solve the above problems, because the similar simulation uses the real physical entity on the site, and can more accurately simulate the impact of the excavation construction process under the satisfied conditions. However, the current similar simulation The experiment cannot carry out continuous pressurization in the horizontal direction, so it cannot simulate the force state of the rock mass in the horizontal direction. During the excavation of the rock mass, purely manual methods are used to remove the collapsed rock mass, and the collapse process of the rock mass is uncontrollable.

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