| With pine deep coal mining town continued to increase mining depth has reached nearly 600m deep, shallow excavation work is transferred from the deep, large changes occurred in the mine geological conditions, the original form and supporting arguments are applicable to the deep mine geological conditions are not certain.Papers by Songshuzhen mine roadway bolt working resistance and roadway surface displacement monitoring of roadway loose circle test, combined with the physical and mechanical properties of coal and rock roadway, the existing support in the form of evaluation, the result is due to the the top of the main roadway rock stress borne by the two groups, the top bolting has failed, shallow roadway roof separation has occurred, the floor heave is very serious, because after many pull the bottom, leading to further expand the roadway loose circle critical load ring is destroyed, critical distance from the load ring surrounding roadway further expansion, load height increases, it becomes difficult to maintain the roadway, indicating that the original support method has failed.Paper test method using sonic technology to test roadway loose circle. When a loose circle of a certain thickness, you can use a combination of theoretical design arch bolting parameters in the design. Then use numerical simulation technology, vertical stress peaks obtained through simulation, the horizontal and vertical displacement values displacement values were analyzed in the study roadway perpendicular to reach the minimum amount of stress and deformation effect is best to determine the optimal support programs to achieve development for the town of pine mine roadway support technology for the realization of mine safety and efficient production. Research papers supporting design Songshuzhen mine roadway provides a theoretical basis for, but also provides a reference for the roadway other similar geological conditions. |
