According to the damage floor heave and rock chracteristics of soft rock roadway under high stress in Hua-ting Coal Mine,whole section supporting techonogy with high strengh cable anchor,reinforced concrete and floor bolt-grouting is researched and used to prevent floor heave in soft rock roadway and solve the supproting problem.

The paper proposes the fundamental and use method of laser profiler,and it also presents the targets and the engineering examples in tunnel excavation and preliminary bracing profiled outline that using laser profiler to detect.

Application of Double Shield TBM in Wanjiazai Diversion Works;

In recent years,bolt support was spreaded and applied rapidly in coal support because of active support,support in time and initial support,but all bolt support can′t be extensively spread in large overhead intersection of floor roadway.

Based on stresses in Fenghuangshan coal mine,testing and designing bolt support in 2315 air return roadway roof adopt all bolt support of high strong screwsteel,side adopt bolt support of bamboo,it keeps rockstrata stabilization of roadway rockstrata has just small deform gains good eoonomic returns and social effect.