Cause Analysis of Synchronous Subsidence of Deep Unconsolidated Layer Shaft and Surface

For explore the reason of synchronous subsidence of surface and industry square shaft of Qianyingzi Coal Mine, according to GB50384-2007 Code for Design of Coal Mine Shaft and Chamber, and combining of statistical analysis of Qianyingzi Coal Mine shaft guide clearance, we comparably illustrate the compression phenomenon of main and auxiliary tank clearance and its developing trend in detail.