Semi-Coalstone Roadway Excavation Scheme and Support Design
In order to solve the problem of uncoordinated mining affecting the production efficiency of coal mines,based on the demand of thin coal seam working face,the best and highly efficient way to dig the roadway with picking top was obtained based on the comparison of stress concentration corresponding to different ways of digging;according to the peripheral rock conditions on the site,it was decided to adopt gunning method and the relevant parameters were determined;and the design of the support of the digging face was completed with the use of the combined support method of anchors and anchor ropes.Practice shows that the combined method of picking the top and gunning for semi-coalstone roadway greatly improves the digging efficiency and achieves the effect of rapid digging.
semi-coal rock roadwaypicking top excavationblastingjoint supportdigging footage
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