摘要
随着我国浅部煤炭资源的开发利用,为了提高煤炭资源回收率,响应国家绿色生态开采的号召,西铭矿开发研究了一种新型的高水充填材料,并且在西铭矿42206沿空留巷工作面应用效果良好。实验室内实验测得凝固时间和早期强度均能达到现场要求,在水灰比1.5:1的条件下,高水材料不仅具有一般材料的弹性阶段,同时还有着能够维持的塑性材料强度特征。也即为,在外部施加的载荷达到材料的强度时,材料本身并没有完全丧失它的承载能力。在材料变形达到10%时,抗压强度还可以维持在峰值强度的59%左右[7]。现场表明:材料强度和可缩性设计合理,巷道围岩变形不大,能够满足安全生产和通风需要[1]。
With the development and utilization of shallow coal resources in China,in order to improve the recovery rate of coal resources and meet the call of national green ecological mining,Ximing Mine has developed and studied a new type of high-water filling material,which has been applied in 42206 gob-side entry retaining face of Ximing Mine with good results.Laboratory experiments show that the solidification time and early strength can meet the field requirements.Under the condition of water cement ratio of 1.5:1,the high water material not only has the elastic stage of general materials,but also has the plastic characteristics that can be maintained.That is,the material itself does not immediately lose its carrying capacity completely when the load is large enough.When the deformation of the material reaches 10%,the compressive strength can be maintained at 59%of the peak strength The field shows that the design of material strength and contractibility is reasonable,and the deformation of roadway surrounding rock is small,which can meet the needs of safety production and ventilation.
作者
李磊波
Li Leibo(Tunlan Mine of Xishan Coal and Electricity,Shanxi Coking Coal Group,Shanxi,030206)
出处
《当代化工研究》
2022年第1期102-104,共3页
Modern Chemical Research
关键词
高水材料
充填开采
沿空留巷
high water material
filling mining
gob-side entry retaining
