Determination of the reasonable support working resistance
Support working resistance, as an important basis on choosing support, although has many determination methods, all of them have shortages due to lots of complicated influencing factors. Based on extensive reference on relative material of both home and abroad and according to the rock strata control theory, this paper compare support working resistance required in large height mining with that in slicing mining under the same geological condition by using theoretical analysis and field measurement, and successfully explains why the working resistance identified by the commonly 4-8 times High-density method in the large height mining is often lower. That is, the block can not meet the condition of voussoir beam but form cantilever beam, resulting in the roof-hanging distance is equivalent to the periodic weighting distance instead of roof-control distance. On this basis a new method called model method, which establish different mechanical models according to different geological condition, is put forward. The research results have been successful applied in Shendong mining area.
rock strata control working resistance large height mining roof-hanging distance
Hao Xian-jie Xu Jia-lin Zhu Wei-bing Wang Xiao-zhen
State Key Laboratory of Coal Resources and Mine Safety, Xuzhou 221116, China School of Mines, China University of Mining and Technology, Xuzhou 221116, China
国际会议
The 6th International Conference on Mining Science & Technology ICMST 2009(第六届国际矿业科学技术大会)
徐州
英文
1-8
2009-10-18（万方平台首次上网日期，不代表论文的发表时间）