似膏体充填开采防止高承压底板水突出研究

以曹庄煤矿81006工作面为试验研究对象,开展了以防止高承压底板水突出为目的的似膏体充填开采系统及工作面底板破坏深度探测研究。研制了以胶固料、矸石粉、粉煤灰为原料的充填材料,构建了地面及井下2部分充填系统,实现了物料的添加、搅拌、输送的自动控制。采用钻孔双端封堵测漏装置,对似膏体充填开采工作面(81006工作面)和顶板垮落法开采工作面(8812工作面)的底板破坏深度进行了现场实测。结果表明,在似膏体充填开采条件下,矿山压力对工作面底板破坏深度显著减小。基于"下四带"理论,分析了似膏体充填开采条件下矿山压力对底板破坏深度减少的机理,证明了似膏体充填开采是防止高承压底板水突出的有效措施。

On preventing the high pressure water-inrush from floor with paste-like backfill mining

Studies on the paste-like backfill mining system and the floor failure depth of working faces were carried out in the working face 81006 of Caozhuang coal mine to prevent water inrush from floor karst aquifer. The new type of backfill material made up of cementitious material, coal waste and ash was developed. The backfill mining system was divided into the ground backfilling system and the un-derground system. The system achieves automatic control of material’s addition, mixing and transporta-tion. Double-block leak hunting in drill was applied to measure the floor failure depth in the backfill mining face (working face 81006) and the mining face by caving method (working face 8812). It turns out that the past-like backfill mining has a significant effect on decreasing floor failure depth caused by mine pressure. Based on the“lower four-zone”theory, we analyzed the reducing mechanism of floor damaged depth caused by underground pressure under the condition of paste-like backfill mining, prov-ing that the paste-like backfill mining is the effective measure to prevent high pressure water-inrush from floor.