为了解决煤矿胶结充填开采成本高、充填工艺复杂、采充矛盾突出等问题，研发了可实现采充并行作业的连采连充采煤工艺，研究了不同配比充填材料的流动特性与龄期强度变化规律，提出了适应于不同煤层倾角的充填料浆井下混合与地面混合输送系统，以及相应的工作面密实充填方法，形成了完善的连采连充式胶结充填采煤成套技术。研究了不同充填开采模式影响下，充填采煤过程采场围岩应力动态迁移规律；基于影响充填采场围岩变形的“三量”特征，提出了充填采场覆岩移动“三度”控制原则，即较快的充填速度、合理的采空区充实度与稳定的充填体强度。阐明了煤柱与充填体交替承载控顶机理，揭示了连采连充分步置换煤炭技术原理：煤柱与充填体交替承载控顶可保证稳定的充填空间，分步置换煤柱可保证充填材料具有合理的胶结固化时间，实现采煤和充填互不干扰，工作面可连续的开采和连续的充填，采充最大限度地平行作业，大幅提高胶结充填采煤效率。研究成果应用于内蒙西部地区四个煤矿-生态园下采煤、复合顶板、处理固体废物、回收遗留大巷保护煤柱，并进行典型工程应用案例分析。现场试验结果表明：连采连充式胶结充填采煤技术在四个煤矿均取得了良好的工程应用效果，可有效控制岩层移动、高效置换遗留煤炭资源，有利于实现煤炭资源的安全、绿色、高效开采。

To solve the problems of high cost of cemented backfilling mining, complex backfilling technology and prominent contradiction between mining and backfilling in underground coal mine, the continuous mining and continuous backfilling technology was proposed, which can realize the parallel operation of mining and backfilling.The flow characteristics and age strength of backfilling materials with different proportions were investigated.Additionally, the underground mixing and surface mixed transportation system of backfilling slurry suitable for different coal seam inclinations and the corresponding dense filling methods of working facewere put forward, forming a complete set of cemented backfilling mining technology with continuous mining and continuous backfilling method.Thedynamic migration law of stress in surrounding rock of stope inthe process of backfilling mining was studied under the influence of different backfilling mining modes.Based on the characteristics of“the amount of roof-to-floor convergence before backfilling, the displacement between the backfilling body and the roof, and the amount of compression of backfilling body”which affect the surrounding rock deformation of the backfilling stope, a triple-control strategy of overburden movement in backfilling stope was adopted.The strategy is composed of a faster filling speed, a reasonable filling degree of goaf and suitable strength of filling body.Therefore, the mechanism of alternating load and roof control of coal pillar and backfilling body was explained,andthe technical principle of replacing coal step by step through continuous mining and continuous backfilling was also revealed.The application found that the alternating load of coal pillar and backfilling body to control the roof can ensure a stable backfilling space.The step-by-step replacement of coal pillar can ensure that the backfilling material with a reasonable curing time, realizing that coal mining and backfilling donot interrupt with each other.Therefore, the working face can realize continuous mining and continuous backfilling, ensuring the maximum parallel operation of mining and backfilling, and then greatly improve the efficiency of cementedbackfilling mining.The research results have been applied to four coal mines in western Inner Mongolia for different application cases, i.e., mining under the ecological park, composite roof, treatment of solid waste and recovery of protective coal pillars ofmain roadways.The field tests show that cemented backfilling mining technology with continuous mining and continuous backfillingmethod has achieved some good engineering application results infourcoalmines, which can effectively control strata movement, and efficiently replace the remaining coal resources.

1 连采连充采煤工艺

   1.1 工作面巷道布置

   1.2 充填采煤工艺

2 充填材料与输送系统

   2.1 充填材料

   2.2 充填料浆井下混合输送系统—（缓）倾斜煤层

   2.3 充填料浆地面混合输送系统—近水平煤层

3 连采连充分步置换煤炭技术原理

   3.1 数值模型

   3.2 采场围岩应力动态迁移规律

   3.3 分步置换煤炭原理

4 典型工程案例

   4.1 裕兴煤矿——生态园下采煤

   4.2 昊源煤矿——复合顶板

   4.3 察哈素煤矿——处理固体废物

   4.4 黄白茨煤矿——回收遗留大巷保护煤柱

5 讨论

6 结论