Surrounding rock control method for large-deformation mining roadway with anchor removal and expansion roadway replacement shed

Abstract

The invention discloses a surrounding rock control technology for a large-deformation stoping roadway after anchor removing, roadway enlarging and shed substituting. The surrounding rock control technology mainly comprises the steps that the roadway enlarging mode of the large-deformation stoping roadway is designed to be a roof-brushing roadway enlarging mode, and the section of the large-deformation stoping roadway is in a vertical wall arch shape; according to the design requirements of a repairing section of the large-deformation stoping roadway, anchor cables and anchor rods of the firstrow and the second row of surrounding rock of the stoping roadway are removed through an anchor removing machine; in the area where the anchor cables and anchor rods of the first row and the second row are removed, the surrounding rock of the roadway is subjected to manual coal side brushing and roof-brushing roadway enlarging through a pneumatic pick; after the roadway enlarging section is formed, a U-shaped steel shed is erected timely, and the U-shaped steel shed and the wall surface of a shed-substituting roadway body are compacted through back plates; anchor cables and anchor rods of thethird row are removed through the anchor removing machine, roadway enlarging and erecting of another U-shaped steel shed are conducted in the area where the anchor cables and anchor rods on the thirdrow are removed, and the U-shaped steel shed is located between the anchor rods of the second row and the anchor rods of the third row; and anchor removing, roadway enlarging and shed substituting ofthe areas of anchor cables and anchor rods of the fourth row, the fifth row and the sixth row are conducted till anchor removing, roadway enlarging and shed substituting of the large-deformation stoping roadway are completed.

Description

technical field [0001] The invention relates to a method for controlling the surrounding rock of a large-deformation roadway. The active support of bolts and the secondary passive support of section steel are mainly coordinated to realize the stability of the surrounding rock in the large-deformation mining roadway after removing anchors, expanding roadways and replacing sheds. The field of stability control of surrounding rock in deformed mining roadway. Background technique [0002] After the excavation of the coal mine underground roadway, the original rock stress around the roadway is destroyed and the surrounding rock stress is redistributed. In the process of stress rebalancing, the coal rock mass around the roadway is moved, deformed and destroyed. When the deformation of the surrounding rock exceeds the allowable deformation of the roadway, the roadway cannot be used normally and affects the normal work of the underground. At this time, the roadway is generally calle...

AI Technical Summary

Problems solved by technology

[0004] The present invention proposes a large-deformation mining roadway for removing anchors and expanding roadway based on the problems that it is difficult to form a matching standard process for large-deformation mining roadway bolt removal, roadway expansion forming and shed replacement reinforcement, the support strength cannot be fully utilized and the construction cost of a single process is high. Surrounding rock control method for replacement shed, aimed at solving the problem that it is difficult to effectively support the bearing body after a large-deformation mining roadway is enlarged

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