Study on Evaluation Method of appliance effect for Exploiting Protection Layer
Abstract：In order to analyze the implementation effect of protection layer exploiting, according as distortion mechanism of wall rock and moving characteristics of gas, evaluation results index system on protection layer exploiting was brought forward, and ap- plication methods of testing evaluation indexes were analyzed in locale practice area. Research result indicated that the measure system includes two pats which one is evaluation of protection scope and the other is protection effect. Those factors of gas pres- sure, gas content, coal seam permeability coefficient, relative deformation of coal seam roof and floor, gas drainage quantity and the change of outburst indexes can be used as the evaluation indexes in fieldwork. In accordance with the steps of effect assess- ment on protective layer, the protection scope should be ascertained firstly, then protection effect can be evaluated in term of coal physical properties, coal seam gas properties and dynamic characteristics in coal mining. The evaluation result can be appraised quantificationally by contrast measured values on-site and index Thresholds.
Keywords：protection layer exploitingcoal and gas outburstindex systemevaluation method
Publication Date：2012-01-01
Online Publishing Date：2025-08-15(First online date of this platform, not the publication date of the document)
Pages：5( 11-15 )