Coal Roadway Surrounding Rock Control And Bolting With Mesh Research

Coal Alley is the main form of coal mining roadways, Mining Gateway CoalRoadway generally have the characteristics of "soft" wall rock.Also layer ofmanagement structure, low intensity, prone to destruction and the mining impact, isoften the problem of coal mine support. Bolt support in soft rock roadway support as amajor scientific and technological project is a soft rock. Therefore, the subject ofcombined coal6105fully mechanized caving face roadway,"soft" wall rock boltingtechnology used in roadway was studied. Through field research, experimental rockmechanics, theoretical analysis and numerical simulation studies, off cut, transportalong the trough and back to the wind along the grooves of a comprehensive andsystematic analysis, control and anchor in the coal Roadway support on the basis oftechnical studies, and obtained coal roadway control principle is conducive to the coal6105fully mechanized caving mining face roadway stability, and to determine thetechnical parameters of the bolting with mesh.In this paper,mainly do the following work:（1）Geological Evaluation of mechanical properties. The field investigation ofthe coal seam characteristics, geological structure and the surrounding rock structure,which is the core in a rock mechanics laboratory experimental mechanical properties ofthe surrounding rock and coal.（2）The theoretical analysis. Rock and minerals pressure on the roadway systemanalysis, come to the6105mining roadways fall into two groups than the softsurrounding rock lithology. Basic failure mechanism: The roof curved sinkâ†'two tohelp support the increasing pressureâ†'spalling cross-helpâ†'roof span to increaseâ†'again to increase the two to help support pressureâ†'help in increased roof deformationoccurs.Roadway roof should be guided by timely support bracket with the appropriateflexibility, small deformation principle, and finally at the stage of elastic-plastic stability.The two sides roadway should be guided by timely support, retractable workingresistance principle, the last in a loose stable phase. Corresponding to the boltsupporting the principle is different. Roof bolt support using suspension theory,composite beam theory and less cross-theory. The roadway between two bolt supportextrusion reinforcement principle, zone theory, anchoring theory of dilatancy and theoverall anchoring theory. （3）Numerical Simulation. In the FLAC3D the coal mines6105working faceopen cut eye was simulated destruction without support under the conditions ofdeformation of roadway in the horizontal and vertical direction of the stress and strainanalysis, obtained initial bolt supportprograms. Combination of theoretical analysis, themodified bolt supporting technical parameters. Roadway in support under the conditionsof stress and strain using a modified program on the second simulation, the stress andstrain of the roadway has been improved, the surrounding rock to reach the steady state.（4）Construction process. Wrote in order to ensure the effective application ofthe support program and on-site construction safety, construction technology andquality standards for bolting with mesh.