极近距离煤层回采巷道布置及支护技术研究

In order to study the problem of rational gateway position of lower coal seam of Tangshangou mine in Datong，Shanxi Province,the paper analyzed and calculated with Elasticity、 rock mechanics and Soil Mechanics.the calculations show that the maximum strain in the floor from the 10 seam mined is 13.48m. Taken Inner crossing layout of the 13seam gateway in low stress region was determined qualitatively. The stress distribution law in the floor around the pillar was analyzed.the reasonable inner stagger distance for the gateway in the number 13 seam is 9.45m under uniform load.a mean of support pattern,bolt +belt+ wire-netting+ grouting anchor cable+ truss,was adopted.Field studies show the inner stagger distance of 9.45m is suitable, the supporting result is good and strong pressures do not appear after mining.