Surrounding Rock Deformation Mechanism and Bolts Supporting of the Cracked Roadways
The surrounding rock of the cracked roadways which is very weak, usually can not be self-stable, and its stability is affected by many factors. So, the supporting of this type roadway is very difficult. The surrounding rock deformation mechanism of the cracked roadways was analyzed in detail under the conditions of the 3 factors which were stress, geology and time in this paper. Based on the mechanism, the supporting mechanism of improving stress state and supplying timely, initiative and effective supporting were proposed, and then, the quaternary supporting system of roof-floor-sides-support unit was built. Self-supporting properties of surrounding rock can be improved better by these ways. In addition, bolt supporting mechanism of the cracked roadways was deeply analyzed. The roadway can be stable by combined supporting. In site experiment, the floor heave value and sides deformation were reduced 72％ and 55％ separately.
cracked roadways surrounding rock deformation supporting mechanism bolt supporting
Zhang Zhen Kang Hong-pu Wang Jin-hua
Coal Mining and Design Branch,China Coal Research Institute
国际会议
大连
英文
419-422
2009-10-20（万方平台首次上网日期，不代表论文的发表时间）