Research on Treatment Technology of Roadway Floor Heave in Shallow Depth Mine

In order to solve the serious roadway floor heave problems in fully- mechanized coal mining face of Bulianta Coal Mine, the inverted- arch floor method, concrete precast block method and partition coal pillars method to treatment floor heave under the condition of soft rock and mining pressure respectively were applied. The results showed that the maximal rib- to- rib convergence was 400 mm when inverted- arch floor method was used, and the maximal roof- to- floor convergence was 890 mm. The maximal rib- to- rib convergence was 400 mm when concrete precast block method was used, and the maximal roof- to- floor convergence was 990 mm. T he maximal rib-to- rib convergence was 400 mm when partition coal pillars method was used, and the maximal roof- to- floor convergence was 900 mm.The treatment fl oor heave effect were almost the same when the inverted- arch floor method, concrete precast block method and partition coal pillars method was individually, but consi dered from the aspects of economic benefit, should choose concrete precast block method.