Research on Grouting Reinforcement Technology of Broken Roof of Fully Mechanized Mining Face
When fully mechanized mining face meets geological structure,it is common for coal wall and roof to fall under the influence of tectonic stress and mining movement.Based on the background of the fully-mechanized mining face of a mine,aiming at the roof problems during the period of igneous rock and fault structure,the causes of roof accidents and the mechanism of grouting reinforcement are analyzed,and the Malisan chemical grouting is adopted to strengthen and fill the area with serious roof falling and caving.Practice has proved that the physical and mechanical properties of crushed coal and rock mass and the integ-rity of coal body have been improved by grouting filling and strengthening in the structural fracture zone,and the maximum wall depth of the working face has been reduced from 1.8 m to 0.4 m,and the maximum roof falling height has been reduced from 2.9 m to 0.6 m,which has improved the safety and efficiency of the working face.
fully mechanized mining facetectonic beltstability of coal and rock massgrouting rein-forcement
NETL
NSTL
万方数据
