Optimized supporting method for empty roof area of tunneling roadway

Abstract

The invention belongs to the field of roadway supporting methods, and particularly relates to an optimized supporting method for an empty roof area of a tunneling roadway. Comprising the following steps. The method comprises the following steps: S1, acquiring geometric parameters of a dug roadway and mechanical experiment parameters of a coal rock body; s2, selecting five groups of different lengths L1, L2, L3, L4 and L5 of the empty top area; s3, constructing a numerical calculation model in equal proportion, and simulating the deformation of a top plate when a roadway is tunneled for a certain length and then is supported and the length of an empty roof area is excavated; s4, designing an initial supporting scheme of the roof in the empty roof area; s5, an initial supporting scheme is applied to the roadway roof, and after the length of the next empty roof area is excavated in the roadway through simulation analysis, the deformation value d of the roof of the previous empty roof area after supporting is calculated through simulation; s6, if the further deformation value d is smaller than or equal to 10 mm and S is smaller than or equal to 50 mm after the roof of the empty roof area is supported, the supporting scheme is reasonable; if the further deformation value d of the roof in the empty roof area after supporting is larger than 10 mm, it is unreasonable, the initial supporting scheme is improved, the further deformation value d is simulated till the further deformation value d is smaller than or equal to 10 mm and S is smaller than or equal to 50 mm, and the supporting scheme is determined.

Description

technical field [0001] The invention belongs to the field of roadway support methods, in particular to an optimized support method for the empty top area of ​​a tunneling roadway. Background technique [0002] The rapid tunneling of coal roadway is an important guarantee for the mine to increase the speed of single excavation, solve the contradiction of mining, and promote the upgrading of coal mine mechanization. Scientific and reasonable empty head distance is the premise of safe and rapid tunneling. The setting of the empty roof distance plays a vital role in the entire excavation operation. If the empty roof distance is too small, the excavation and support operations will alternate frequently and seriously affect the roadway excavation speed; Safety accidents such as roof falling are prone to occur. Therefore, on the premise of ensuring safe work, determining the reasonable size of the empty roof distance is the premise of rapid excavation. [0003] Coal mines in my ...

AI Technical Summary

Problems solved by technology

The setting of the empty roof distance plays a vital role in the entire excavation operation. If the empty roof distance is too small, the excavation and support operations will alternate frequently and seriously affect the roadway excavation speed; Prone to safety accidents such as roof falling

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