DOI: 10.11799/ce202501011
Characteristics of fly ash gangue based paste material and analysis on the goaf filling technology
DONG Haiqing
LI Yabin
GUO Dongmei
HUANG Xianwu
WANG Bo
Abstract：In order to effectively reduce ground subsidence and surface cracks above gob areas of coal mines,and comprehensively utilize coal gangue and fly ash of coal-fired power plants,the coal mines and coal-fired power plants in the Qipanjing mining area were taken as the research objects,and test blocks were prepared with different materials.The filling material of coal mine goaf based on fly ash and coal gangue in Qipanjing mining area was developed,and the filling technology and implementation process of goaf and roadway side in fully mechanized mining face of coal mine were put forward.The results showed that,there are a large amount of coal gangue and fly ash in Qipanjing Mine and its surrounding areas,and their composition is conducive to the preparation of filling materials.The filling materials made from the coal gangue and fly ash is 8～15 MPa,which meets different filling requirements,and the comprehensive utilization of coal-based solid wastes is more than 80%.The low-strength filling material used in the goaf and the high-strength filling used in the roadside along the gob can save the control cost,be conducive to the rapid filling,and realize the full consumption of coal-based solid waste such as fly ash and coal gangue in Qipanjing mining area.
Keywords：gob areafly ashcoal ganguepaste materialzonal filling
Publication Date：2025-01-19
Online Publishing Date：2025-08-15(First online date of this platform, not the publication date of the document)
Pages：6( 77-82 )