Repairing and reinforcing method for vertical shaft wall collapsed fiercely

Abstract

The invention discloses a repairing and reinforcing method for a vertical shaft wall collapsed fiercely. The method includes the steps that a retaining wall is arranged outside an ingate at the bottom of the shaft and provided with a few drain holes; a collapsed fracture region of the shaft wall is detected; according to the detection result of a three-dimensional laser scanner of a goaf, the collapsed vertical shaft wall is divided into a collapse region, an upper cracking region, an upper affecting region, a lower cracking region and a lower affecting region, and elevation ranges of all the regions are determined; the shaft is grouted in a layered mode; an auxiliary temporary ventilating system is set up; tunneling and temporary supporting are carried out; a permanent shaft wall is constructed; collapse objects are cleared. The new reinforced concrete shaft wall is poured again to serve as the permanent support of a collapsed vertical shaft, a high-strength spring compressible layer is arranged on the lower portion of the new reinforced concrete shaft wall in the collapse region and allows the new shaft wall in the collapse region to deform vertically within a certain range, and long-term stability of the new shaft wall can be achieved. The repairing and reinforcing method for the vertical shaft wall is safe, reliable, short in construction period, practical and efficient.

Description

technical field [0001] The invention relates to a method for repairing and strengthening a shaft wall of a vertical shaft, in particular to a method for repairing and strengthening the shaft wall of a severe collapsed shaft. Background technique [0002] Underground mining causes the overlying strata to move and deform up to the surface, often under the premise of protecting coal pillars, it still affects the surrounding of the shaft, seriously affecting the safety of the shaft, resulting in deformation and damage of the shaft, which directly affects the normal operation of the mine. Production, shaft rupture and collapse phenomenon occur from time to time in many mining areas across the country. The vertical shaft is the throat of the coal mine, and the destruction of the shaft wall has brought a great threat to the safety production of the coal mine. According to preliminary statistics, the rupture of the well wall has caused economic losses of hundreds of millions of yua...

AI Technical Summary

Problems solved by technology

If the vertical shaft in the period of severe collapse activity is not repaired and reinforced in time, as the collapsed area increases, if the shaft wall and surrounding rock collapse cannot be controlled as soon as possible, then the shaft dislocation, the derrick deflection, the industrial square sinking, the ground construction (Structure) damage equal to catastrophic accidents may occur at any time, the consequences are un...

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