废弃煤矿废弃物地下灌注技术可行性探讨

Feasibility of waste backfilling in abandoned coal mine

为了降低废弃物及废弃煤矿对环境的污染,提出了废弃煤矿废弃物灌注技术的可行性。分析了可灌注废弃物的种类,讨论了目标地层的选择原则。提出采用可控充填、低压充填以及高压灌注等3阶段液力充填方法对废弃煤矿进行废弃物灌注。为保证工程顺利施工,需要检测灌注压力、压裂裂缝、地面隆起等情况,并控制灌注混合物的特性。初步分析表明,对废弃煤矿进行废弃物灌注具有技术可行性。

In order to reduce environmental risk, a possible and environmental technique to dispose the waste in abandoned coal mines is put forward. The types of injectable waste are analyzed. The principles for selection of target strata are discussed. Three hydraulic filling methods to inject waste in abandoned coal mine, i.e., controlled backfilling, low pressure backfilling filling and high pressure injection, are proposed. In order to achieve project performance, injection pressure, fracture propagation, surface uplift should be detected and the features of injected mixture should be controlled. The initial analysis indicates that it is technically feasible to dispose waste into abandoned coal mines.