Steeply inclined coal seam horizontal segmentation full-mechanized caving mining simulation experiment table and method

Abstract

The invention relates to a steeply inclined coal seam horizontal segmentation full-mechanized caving mining simulation experiment table and method. The experiment table mainly comprises an experiment table frame, a coal support, a support base, organic glass, channel steel, induration materials and bulk materials, wherein the support base and the coal support are placed on the experiment table frame, and the induration materials simulate a steeply inclined coal seam top and a floor stratum; between the organic glass and the channel steel, the bulk materials are used for simulating broken top coal and gangue in an upper-segment goaf. After a model is laid, a coal inlet of the coal support is opened, and the top coal drawing process and the roof fracturing process are observed through the organic glass. According to the particle structural feature of the bulk materials and the characteristic that the strength of the induration materials is controllable, simulation of the top coal drawing process and simulation of the roof fracturing process during steeply inclined coal seam horizontal segmentation full-mechanized caving mining are achieved simultaneously, and conditions are provided for research on increase of the top coal recovery rate and the roof control level.

Description

technical field [0001] The invention relates to the field of mining technology and engineering, in particular to a simulation experiment platform and an experiment method for horizontal subsection fully mechanized caving mining of steeply inclined coal seams. Background technique [0002] The "13th Five-Year Plan" energy plan proposes that the development of coal resources in my country will be further concentrated in the west, and for a large number of steeply inclined thick coal seams and extra-thick coal seams in the west, horizontal segmented fully mechanized caving mining is currently one of the main methods for mining such coal seams. In the production practice of horizontal sub-level fully mechanized caving mining in steeply inclined coal seams, it is found that because the roof and floor are located on both sides of the working face, the law of roof breaking and mine pressure is complicated; and the thickness of the top coal leads to the flow and migration path of the ...

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Problems solved by technology

[0002] The "13th Five-Year Plan" energy plan proposes that the development of coal resources in my country will be further concentrated in the west, and for a large number of steeply inclined thick coal seams and extra-thick coal seams in the west, horizontal segmented fully mechanized caving mining is currently one of the main methods for mining such coal seams. In the production practice of horizontal sub-level fully mechanized caving mining in steeply inclined coal seams, it is found that because the roof and floor are located on both sides of the working face, the law of roof breaking and mine pressure is complicated; and the thickness of the top coal leads to the flow and migration path of the broken top coal Difficult to predict, resulting in low top-coal recovery rate in horizontal sub-level fully mechanized caving mining of steeply inclined coal seams

[0003] Studying the roof fracture characteristics and its influence on the loose top-coal discharge law is the key to solving the low recovery rate of the top-coal in fully mechanized horizontal caving mining. Simulation of Top-coal Release and Roof Breaking Process in Coal Seam Horizontal Sectional Fully Mechanized Caving Mining

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