Abstract:

Over roadway small rock pillar interchange construction technology is profound and beneficial in coal mining. By applying comprehensive support of advanced pipe shed, rock bolt, meshes and 25U steel support, Xiaojiawa Coal Mine 211304 working face was interchanged with normally operated working area No.21 downwards conveyor. Interlayer is 1.7m thick and 15m wide. Construction section achieved 20.1m2. This construction technology is precious and can be referred by similar project.

Key words:

small rock pillar, through interchange, lead pipe shed;combined support