Open AccessResidual mining caving face over the roadway and the key technology of deformation
Author(s) -
Jun He
Publication year - 2020
Publication title -
iop conference series. earth and environmental science
Language(s) - English
Resource type - Journals
eISSN - 1755-1307
pISSN - 1755-1315
DOI - 10.1088/1755-1315/508/1/012066
Subject(s) - residual , mining engineering , face (sociological concept) , deformation (meteorology) , coal mining , intersection (aeronautics) , geotechnical engineering , coal , stack (abstract data type) , position (finance) , geology , engineering , computer science , transport engineering , business , social science , oceanography , algorithm , sociology , programming language , waste management , finance
Multi layer multi angle face roadway of coal mining face of residual mining brings technical challenges to the safety of the working face mining. With the background of the 6212 residual coal mining face in a mine in Shanxi, the deformation laws of the surrounding rock in the slanted roadway, the bottom coal slanting roadway and the intersection point are analyzed by numerical simulation. The simulation results show that at least the reinforcement measures should be carried out by 20m in the empty lane, and the plastic zone in the floor of the roadway along the top is obviously developed, and the stress concentration of the surrounding rock is high, and the support and management should be strengthened. In view of the space position of the site, the key technical measures are put forward, such as dense support or wood stack, anchor net cable, and super high water material grouting pre-filling, so as to ensure the safe recovery of the residual mining face.