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针对我国建筑物下压煤充填开采技术在实际应用中存在的不足,本文通过对超高水材料基本性能的研究,提出进行采空区开放式充填开采,这可使具有高流动性的超高水材料浆液在岩层活动期内自行流入煤层开采后所形成的“采空”空间并在可控时间内胶结、凝聚,凝固后的充填体与垮矸以及围岩形成一完整的结构体来控制上覆岩层活动,从而达到有效减缓地面沉降的目的.研究结果表明:超高水材料是性能良好的采空区充填材料;超高水材料开放式充填开采技术是解放建筑物下压煤的一种先进的方法,是符合绿色开采方向的成果.
In view of the shortcomings in the actual application of the coal filling technology under the buildings in our country, this paper puts forward the open filling and mining in the goaf by studying the basic properties of ultrahigh water materials. This method can make the ultrahigh During the active period of the rock, the slurry of water material will flow into the “mined-out” space formed after the mining of the coal seam and cemented and coalesced within the controllable time. The filled groud and the collapsed rock and the surrounding rock form a complete structure To control the activity of overlying strata so as to achieve the purpose of effectively reducing the land subsidence.The results show that the ultrahigh water material is a well-behaved gob filling material and the open filling technology of ultrahigh water material is to release coal under the pressure of buildings An advanced method that is consistent with the direction of green mining.