Underground backfilling stands out as a crucial technological strategy for the eco-friendly and effective management of solid waste in mining operations. However, existing backfilling techniques have led to increased production processes at the working face, resulting in a reduction in coal extraction efficiency. Addressing the temporal and spatial interference between mine solid waste backfilling and coal mining is essential. To overcome this challenge, this study introduces a novel post-mining spatial gangue slurry backfilling method. Radar detection was employed to ascertain the typical characteristics of the subsequent space collapse roof shape. Stress monitoring and compaction experiments were conducted to establish the relationship between stress and the bulking coefficient of the overlying rock mass, identifying subsequent spatial void structure characteristics. The development of a CO₂ mineralized coal-based solid waste filling material, utilizing conventional low-calcium fly ash under normal temperature and pressure conditions, was presented. This paper provides a comprehensive understanding of the post-mining spatial gangue slurry backfilling method, outlines the spatial layout approach for the corresponding system, and analyzes research challenges associated with gangue slurry backfilling materials and the technology of slurry injection borehole layout. The research aims to innovate an efficient underground disposal model for gangue, contributing to the refinement of the technical system for the comprehensive disposal and utilization of gangue.

地下回填是采矿作业中固体废物环保和有效管理的一项重要技术策略。然而，现有的回填技术导致工作面生产工序增多，导致采煤效率降低。解决矿山固废充填与煤炭开采之间的时空干扰至关重要。为了克服这一挑战，本研究引入了一种新颖的采矿后空间煤矸石浆回填方法。利用雷达探测来确定随后空间塌陷屋顶形状的典型特征。通过应力监测和压实实验，建立应力与上覆岩体膨胀系数之间的关系，确定后续的空间孔隙结构特征。介绍了利用常规低钙粉煤灰在常温常压条件下研制的CO ₂矿化煤基固体废弃物填充材料。本文全面介绍了采后空间煤矸石浆充填方法，概述了相应系统的空间布局方法，分析了煤矸石浆充填材料和注浆钻孔布局技术的研究挑战。该研究旨在创新煤矸石高效地下处置模式，为完善煤矸石综合处置利用技术体系做出贡献。