Fully mechanized caving top coal caving three-dimensional simulation experiment method

Abstract

The invention discloses a fully mechanized caving top coal caving three-dimensional simulation experiment platform and an experiment method. The platform and the method are used for researching the influences of elements in coal mine fully mechanized caving working face, such as mining-caving ratio, caving manner, caving technology, bracket tail beam inclination angle, coal caving port size, and broken top coal particle sizes, upon fully mechanized caving working face top coal recovery rate, and for verifying the influence of the spatial arrangement of an onsite top coal tracker upon onsite actual measurement precision of top coal recovery rate. According to the experiment platform provided by the invention, a mobile immediate roof is arranged, such that the influence of roof caving during an experiment process upon the recovery rate can be avoided. Coal pillars are preserved on the boundary, and only central-area recovery rate is counted, such that the influence of experiment method boundary conditions upon recovery rate statistics can be basically eliminated. Experimental-area residual coal amount can be obtained by using sheet metal inserts, such that top coal recovery rates under different conditions can be obtained. Therefore, guidance can be made for actual engineering, and an optimal fully mechanized caving scheme can be selected.

Description

technical field [0001] The invention relates to a three-dimensional simulation experiment platform and experimental method for top coal discharge in fully mechanized caving mining, which are used to study the mining and caving ratio, coal caving method, coal caving process, support tail beam inclination angle, and coal caving opening size in fully mechanized caving mining working faces The influence of factors such as particle size of broken top-coal on the top-coal recovery rate of fully mechanized caving face and the influence of the spatial layout of the top-coal tracker on the field measurement accuracy of the top-coal recovery rate. Background technique [0002] The movement law of top coal in fully mechanized caving face is a complex process of bulk mechanics and motion, which makes it impossible to make a good pre-evaluation of the top coal recovery rate of working face under different conditions at this stage. On-site measurement of the top-coal recovery rate is gene...

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Problems solved by technology

Although some scholars have carried out similar simulation experiments in the laboratory, the simulation process has not been able to avoid the roof fall caused by the experiment process and eliminate the influence of the test bench boundary on the recovery rate of the top coal, let alone the space for the on-site top coal tracker. Position optimization to judge

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