Abstract: Analyzing the loose regularity of gateway surrounding is the base for optimum bolting．After analysis of the relationship between surrounding loose characteristics and bolting in non-soft roof and floor gateway，the paper calculates theoretically surrounding loose scope of non-soft floor and roof gateway，obtains the scheme of bolt-mesh-cable coupling supporting in non-soft roof and floor gateway，analyzes surrounding loose regularity of non-soft roof and floor gateway before and after bolting by numerical calculation，and monitors with drilling and detects with ultrasonic surrounding loose scope in test gateway．Results show that surrounding loose scope of non-soft roof and floor gateway lies in both two angles of roof and the middle of two sides．Two sides show semicircle destruction，roof saddle destruction．Surrounding loose scope reduces and surrounding stress transfers from two roof angles to deep in two floor angles along two sides after bolting．Bolt (cable) coupling supporting in roof and floor angles is favorable for stability of gateway surrounding．

Key words: surrounding loose scope, bolting, numerical analysis, drilling peep, ultrasonic