Research on Actual Measurement of Surrounding Rock Fracture and Deformation Law of Mining Roadway in Fully Mechanized Working Face

To study the surrounding rock deformation law of mining roadway in fully mechanized mining face, and provide a reasonable basis for the protection of mining roadway, this paper takes the 2088 working face of Donghuantuo Mine as the engineering background, and uses the field measurement method to analyze 2088 lower air channel through borehole TV detection. The surrounding rock rupture of the roadway is analyzed by analyzing the displacement of the roadway. The results show that there are serious rupture zones in the lower rock stratum of the roadway. The rupture zone is about 2.0 m, and the roadway surrounding rock of 8^# coal seam at the lower 2088 working face belongs to the range of middle and large loose circles; the maximum displacement of the top and bottom plates and the two sides of roadway in the unaffected area is only 84 mm, 34 mm, and the advanced influence range is about 90 m, the maximum amount of the top and bottom plates and the two sides of roadway has reached to 1 280 mm and 1 869 mm. It can be seen that the deformation of the roadway under the disturbance of the working face is more serious. The distance of the working face is 80 m to 0 m before the measuring point, and the displacement of the top and bottom plates and the two sides of roadway are increased to 243 mm, 206 mm, the approach speed increased to 19.1 mm/d and 14.7 mm/d, respectively, both produced significant growth, indicating that the closer the mining face is from the measuring point, the larger the roadway is affected by the mining; when the mining roadway is protected, it is required that the roadway bracket support must be able to effectively support the rock mass and the overburden strata in this range.