Abstract： Gob-side entry retaining technology has significant advantages in improving coal recovery efficiency, alleviating the tension of mining connection and improving the ventilation system of working face. Compared with other roadway filling, high water filling material has the advantages of short solidification time, high early strength, fast resistance increasing speed and large longitudinal deformation ability. Taking the 182605 lower working face of Wutongzhuang Mine as the engineering background, the roof of the gob-side entry retaining roadway was strengthened to ensure the integrity and stability of the roadway roof. The roof of the roadway was cut in advance to release the roof energy by blasting pressure relief, so as to realize the roof cutting along the goaf. Using the mechanical model of gob-side entry retaining, combined with the actual production geological conditions of the working face under 182605 and the mechanical parameters of coal and rock mass, the minimum working resistance of the roadway was 7.2 MN / m. Through the mechanical properties test of the specimens, it wa concluded that the water-cement ratio of high water material was inversely proportional to the uniaxial compressive strength of the specimens. Considering the strength of the filling body, field operation and economic benefits, the water-cement ratio of high water material was 1.8: 1. According to the observation and analysis of the surrounding rock of the roadway on site, the rear of the working face was divided into slow deformation zone, significant deformation zone and stable deformation zone. The successful practice of gob-side entry retaining with high water material in under 182605 working face had achieved good technical and economic benefits and social benefits, and had certain popularization and application value.
牛清海. 大埋深综采工作面高水充填沿空留巷技术研究[J]. 煤炭与化工, 2023, 46(5): 23-27.
Niu Qinghai. Research on gob-side entry retaining technology with high water material filling in large depth fully mechanized mining face. CCI, 2023, 46(5): 23-27.
