关键词: 原巷充填, 充填体, 无煤柱掘巷, 围岩控制

Abstract: Based on the engineering background of 62310 return air alley in Xinzhuangzi Coal Mine, this paper introduces the selection and filling process of original road filling materials. The theoretical analysis method analyzes the surrounding rock control of no coal pillar tunneling, using high-strength anchors and anchor cables. The combined support of hollow grouting anchor cable and steel mesh, select reasonable filling wall strength and width, effectively control the surrounding rock deformation and roof separation layer without coal pillar roadway. Using the field measurement method, the actual measurement is carried out in the 1400 m roadway, and the deformation of the roadway roof is between 30 mm and 50 mm, the roof separation is less than 20 mm, and the deformation of the roadway is 40 mm to 50 mm. Between the observations, the roadway support effect is good, and the surrounding rock deformation of the roadway is effectively controlled.