倾斜煤层的超高水材料混合固结充填法

Super High Water Material Mixed Consolidated Filling Method in Inclined Coal Seam

为解决超高水材料开放式充填受煤层倾角影响较大的缺点,实现倾斜煤层安全、高效的充填开采,创新性地提出了混合充填的新思路,形成了超高水材料混合固结充填技术并深入地进行了可行性分析。给出了相关充填工艺流程:首先填充固体充填物,之后充填高水材料,待浆液液面达到要求高度后,进行二次充填固体充填物。分析了该技术的充填机理和能够控制上覆岩层运动的实质,总结了技术的特色和优点。认为该充填技术合理地利用了煤层倾角,达到了充填不受煤层倾角限制的目地,解决了开放式充填的技术难题,同时还进一步提高了控制地表移动的能力。此外,超高水材料混合固结充填成本低廉,采煤与充填互不影响,为提高倾斜煤层滞压资源采出率、减缓地表损害提供了新的手段,具有广阔的应用前景。

In order to avoid the big influence of inclined angle on open backfill of super high water material and achieve a safe and efficient mining in gently inclined coal seam,the proposal for mixed filling was creatively put forward. The super high water material mixed consolidation technology was formed and its feasibility was deeply analyzed. At the same time,the re-lated backfilling process was proposed：After the consolidated slurry is firstly backfilled,followed by the high water filling mate-rials. When the slurry height reaches a certain level,second filling with consolidated slurry starts. The filling mechanism of the technique and the principals of controlling the overlying strata movement were analyzed. Also,the advantages and characteris-tics of high water material mixed consolidation technology were summarized. The result showed that：this new technology ration-ally utilized the inclined angle of coal seam to receive a breakthrough of filling without being limited by the inclined angle of coal seam and solving the difficulty in super high water material open backfill mining. Meanwhile,the efficiency of limiting rock movement was improved in further. Besides,the super high water material mixed consolidation technology has a lower price and has not a disturbance to mining. It gives a profound application prospect and a new mean to raise the recovery rate of mineral resources under buildings as well as relieve the damage of surface for the inclined coal mine.