Study On Reasonable Position Of Roadway Under The Influence Of Mining And Confined Water

This article applies the methods of theoretical analysis, experiment and numerical simulation, studies the reasonable position of floor rock rise under the joint action of the overlying mining face and the pressure of bottom pressure water.Firstly, stress of an arbitrary point at the bottom, which is induced by joint action under three different states of confined water pressure and the bearing pressure interaction, is deduced by the theory of elasticity in half plane by distributed force at any point of the stress distribution on the roof. It gets the stress state of the bottom plate, which is gotten by pulsing stress caused in the floor and confined water pressure under the same state, and then determines rock plastic zone of floor by using Mohr criteria. Also, design and process device of the rock water experiment of water pressure loading and confined water, rock uniaxial compressive strength, tensile strength, elastic modulus and other mechanical parameters on different conditions were tested. By analyzing it, it is concluded that different soaking confining pressure and soaking time effects the rock mechanical properties of different rock properties, it gives the parameter basis for numerical simulation analysis. In the face of numerical simulation, firstly, using the FLAC3D geotechnical engineering simulation software to analyze the floor rock stress state, failure regularity and its influence on floor roadway of different mining methods and find out the reasonable position of roadway under mining conditions. And then use the COMSOL Metaphysics multi-physics coupling simulation software based on the analysis the effect of floor rock beam on confined water pressure distribution, and accordingly determines the reasonable position of floor roadway.After all, it is confirmed that the position of roadway under the influence of mining and confined water. After verification, the conclusion is believed be correct.