矸石充填的压实特性试验分析

"三下"压煤问题已成为煤矿开采中越来越突出的问题之一,而充填开采技术因其具有控制岩层移动、限制地表沉降的作用,目前已成为解决"三下"压煤问题的重要途径。充填开采技术中,充填体的变形情况可直接反映充填效果。矸石是一种散体材料,因此没有固定的参数对其力学特性进行表征。通过一系列的压实试验进行测试,研究充填材料在受压状态下的变形情况,可以了解充填体的变形情况,掌握充填矸石的压实过程中的本构关系,为研究充填体的变形特征提供理论基础。同时,也可为充填矸石的级配选择提供依据,有利于运输加工设备设施的选型与设计。

Experimental analysis of compaction characteristics filled by coal gangue

" Three " pressing coal mining problem has become one of the increasingly prominent problem,therefore the filling mining technology has become the more important way to solve the "three " pressing coal at present because of its function of control the strata movement,restricting the surface settlement.In the filling mining technology,backfill deformation situation can directly reflect the effect of filling.The coal gangue is a kind of granular materials,so there is no fixed parameters to describe the mechanical properties.Through a series of compacted test and the research of deformation of filling materials under a compression situation we can understand the backfill deformation,master the constitutive relation of filling coal gangue with compaction process.The result can provide a theoretical basis for study on the filling body’s deformation characteristics.At the same time,it can provide the basis for the selection of gradation for filling coal gangue,It is useful for selection and design for the transportation and processing equipments..