Study Of The Bolting Technique About Entry Of Deep Shaft's Fracture Zones

The entry is the indispensable channels using walking, transport and ventilating inproductive system of coal mining, the quality of surrounding rock's controlling influencesgreatly the coal mine's production. Now according to demarcation about the miningdepth ,many mines have already got into a deep extracting to mine in our country, and thewhole country equally mine depth to deepen gradually by the speed with 8～12m of everyyear. Resolving the timbering question of deep working in the fracture zones to minesbeing deep mining have very active meaning.Fracture is one of the underground rock structure, structure planes had arrangedunorderly in fracture zones, according to the style and distributing character of structureplanes, fracture zones can be divided into joint type, fault type, and joint-fault type. Todeep working in the fracture zones adopt characteristic and mechanics environment of thegeology structure that the wall rock carry on analysis, and listed slip judging rule of rockformation with fracture face. Another on the foundation of summarizing the appearancecharacteristics of deep working in the fracture zones, and make use of a large and the finiteelement software ANSYS of the numerical simulation carried on numerical simulation,deducted the transformative characteristics, the dint distribute characteristic and fault to theinfluence degree that the different position tunnel opens to dig trend, and according to theroadway transform and the characteristic of using by uniform stress, put forward timberingprinciple and reasonable support pattern, this is also say, need to strengthen to Support theunsubstantial position and suit the distortion of surrounding rock of roadway using of highstrength and outstretched bolting.Lastly, combined the industrial experimentation about 1216 air return way ofWangjiazhai coal mine, and designed the support pattern affecting by the F_1-3 fault, verifiedits correctness and dependability.