Mechanical Analysis And Stability Controlling Technology Of The Surrounding Rock Around Roadway In Floor Stratas Influenced By Mining Of Yangliu Coal Mine

In our country mostly mine in the select of roadway arrangement, the mining area on the downhill, gas drainage tunnel mining, roadway layout in the higher stability of the floor strata. The majority of floor roadway is affected by the mining disturbance, so it is important to study the deformation mechanism and control technology of surrounding rock. In this paper, taking Huaibei mining area in Yangliu Coal Mine 10416 working face floor by gas pressure under the influence of the tunnel drainage tunnel as the engineering background,10416 roadway drainage lane for the liberation of 10416 machine lane and 104 mining area of 82 coal seam gas pressure exceed the standard of great significance. At the same time, the extraction Lane will serve as a mining area of total return air roadway these lots, once after cross mining severely damaged, repair work will cause huge losses to the mine production, according to the deformation mechanism of surrounding rock of floor roadway of Mining Roadway Surrounding Rock Stability Control Technology launched a series of research, understand the dynamic pressure at the end plate roadway instability mechanism, is important to reduce the cost of support and guarantee the safety of mine production, at the same time has a certain reference value for engineering practice safe mining of floor roadway under similar conditions.The according to the engineering geological characteristics of floor roadway mining, using elastic and plastic mechanics and damage mechanics by establishing the anchor grouting zones in the surrounding rock of the tunnel, will be the end of the anchor head anchoring force, pre tightening force is introduced into the differential equations of equilibrium, characterization, grouting is sprayed concrete support supporting parameters of cohesion, friction angle were increase or reduction, etc., leading to the formation of surrounding rock supporting coupling process embodied in the theoretical derivation.Analysis of mining floor roadway surrounding rock destruction, established two branch support conditions, mined out area, filling conditions of surrounding rock stress field, displacement field and plastic zone scope etc. nonlinear computer simulation and analysis. Based on the two different supporting scheme simulation, determine the cable anchor and related technical parameters of the injection combined support scheme plays an important role in the control of mining floor roadway surrounding rock stability.Combined with theoretical analysis and numerical simulation results, in mining roadway floor of engineering application, the field supporting effect observation shows, roadway surrounding rock obtained stable control, mining floor roadway surrounding rock deformation mechanism and stability control technology applied to the engineering practice.