Experimental Study of Concrete Packing Materials in Roadside Packing of Retaining Roadway Along Goaf

First,the proportion test of concrete packing materials were carried out in retaining roadway along goaf with roadside packing.The uniaxial compressive strength of cementation bodys was tested on different ratios of cement-mortar and gangue.Then,the changes of materials strength were analyzed on different ratio of water-cement and specimens with refuse.The results showed that the changes of specimens strength reduced with concentration increase of water-cement,strength of specimens with refuse were more than cement-mortar,the fluidity of packing slurry was certainly limited as the refuse clearance decreased,so as to impact effect of refuse packing and decreased on integral strength of refuse filling bodys.