Open AccessCalculating the parameters of the induced hydraulic fracture that moves in hard rock roof of a seam in the vicinity of the installation chamber
Author(s) -
N.V. Cherdantsev
Publication year - 2019
Publication title -
iop conference series. earth and environmental science
Language(s) - English
Resource type - Journals
eISSN - 1755-1307
pISSN - 1755-1315
DOI - 10.1088/1755-1315/377/1/012004
Subject(s) - geology , geotechnical engineering , massif , fracture (geology) , deformation (meteorology) , brittleness , roof , rock mass classification , mechanics , structural engineering , materials science , engineering , physics , oceanography , geochemistry , composite material
The results of solving the task for tracing the movement of a hydraulic fracture in the top rocks situated in the vicinity of a stope are introduced in the paper. The massif is loaded with equally component gravity field of stresses and is in the state of plane deformation. The bedrocks and top rocks (roof rocks) are rather tough and deform resiliently and when reaching the limit state fall as brittle materials. The task is solved in the framework of the model of the geo-mechanical state of the rock massif with the adjacent in-seam working. It is based on fundamental principles of the deformable solids mechanics and fulfilled applying the boundary element method and basic classical concepts about the fracture state, its stable or unstable growth in a brittle material. According to the results of the experiment, the trajectories of the fracture growth for a range of coordinate values, its initial position and the angle of gradient initial towards the horizon are built. The graphs of critical pressure changes while the growing of a fracture are introduced.