Working face coal wall stability control simulation experiment table and application method

Abstract

The invention discloses a working face coal wall stability control simulation experiment table and an application method. The working face coal wall stability control simulation experiment table comprises a base mechanism, a bearing mechanism and a pressurizing mechanism, wherein the base mechanism is provided with a base, a slope adjustment jack, connecting groove holes and a connecting shaft; the bearing mechanism is provided with a bearing platform, a side protection plate, an ear ring, a rear cover, an organic glass baffle, a hydraulic support, reverse connecting groove holes, connecting holes, screw holes and screw rod angle steel; the pressurizing mechanism is provided with a cross beam, a longitudinal beam, a loading jack, a loading plate, a pull rod, pull rod connecting holes and a fastening nut. According to the invention, by the efficient matching of the base mechanism, the bearing mechanism and the pressurizing mechanism, coal wall deformation and damage characteristics with different mining height, different coal body intensity, different hydraulic support working resistance and different roof pressure can be obtained in an experiment, and the relationship of the accurate measurement of the coal wall stability with the mining height, the coal body intensity, the hydraulic support operation resistance and the roof pressure is achieved, the basis for the coal wall spalling prevention and control, stope roof load estimation, three-machine matched model selection and the like is provided, and the safe and efficient mining of a coal mining working face is realized.

Description

technical field [0001] The invention relates to the technical field of mine engineering, in particular to a coal wall stability control simulation test platform of a working face and an application method. Background technique [0002] In recent years, with the continuous improvement of the comprehensive mechanization level, the large mining height fully mechanized mining technology has gradually become an important development direction of thick coal seam mining in my country. As the thickness of the longwall working face is gradually increased, the mining intensity is getting higher and higher, and the improvement of the mining intensity has also caused some new problems. Frequent accidents of coal wall slabs and end face roof fall have become restrictions on large-scale mining. The key factor for high working face safety, efficient and rapid advancement. Coal wall slabs will not only affect the normal progress of safe production, but also pose a serious threat to the per...

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Problems solved by technology

Most of the research on coal wall stability at home and abroad focuses on theoretical analysis, numerical simulation and a small number of two-dimensional plane physical models, and there are few systematic studies on the stability of coal walls in working faces under the influence of various factors.

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