Modeling geomechanical processes in underground longwall and shortwall mining of thick coal seams with elements of robotization

Challenges for Development in Mining Science and Mining Industry

Fryanov, V.N.^1 ; Pavlova, L.D.^1

Siberian State Industrial University, Novokuznetsk, Russia^1

关键词: Coal caving;    Coal pillar;    Optimum dimensions;    Short wall mining;    Technological scheme;    Thick coal seam;    Thick layers;    Top-coal caving;   

Others  :  https://iopscience.iop.org/article/10.1088/1755-1315/262/1/012016/pdf
DOI  :  10.1088/1755-1315/262/1/012016

来源: IOP

【 摘 要 】

A variant of the technological scheme for thick layer mining with top coal caving and pre-destruction of coal by means of advanced parallel chambers is proposed. Based on the results of numerical modeling, the optimum dimensions are justified for chambers, interchamber coal pillars as well as crown pillar between the chambers and immediate roof rocks. It has been proved that after the advanced chambers are made, the strength roof coal is reduced by a factor of 2 to 2.5, and therefore the conditions are created for uniform coal caving without dilution. A variant of the technology of unmanned coal mining in the chambers is proposed.