DOI: 10.11799/ce201709020
Research on secondary support parameters of high-stress roadway in Huafeng Coal Mine
GUO Dong-ming
YE Shan-de
WANG Han-jun
LIU Bo
ZHOU Bao-wei
LI Jun
Abstract：In order to obtain the optimum parameters of secondary support in deep high-stress surrounding rock, we took-1180m rock concentrated roadway of Huafeng Coal Mine as an example, and proposed the optimizing method for the secondary support parameters, on the basis of the original support scheme. According to the condition of surrounding rock and the damage reason of instability, we determined that the length and row-line space of anchor cable are sensitivity factors to secondary support effect, and calculated the theoretical value of the length and row-line space of anchor cable, as well as the four preliminary design parameters. FLAC3D was applied to analyze the roof center subsidence, two-side convergence and floor center heave of the 16 secondary support schemes. The result showed that the scheme No. 9 was the optimum scheme, in which the cable length was 8000mm and row-line space was 1200mm × 1200mm. The subsidence of roof was 338mm, two-side convergence was 513. 8mm, floor heave was 468. 9mm. Favorable surrounding rock control effectand reasonable economy were achieved.
Keywords：secondary supporting parametersorthogonal testnumerical simulationsurrounding rock of roadway
Publication Date：2017-01-01
Online Publishing Date：2025-08-15(First online date of this platform, not the publication date of the document)
Pages：5( 75-79 )