Three-shell collaborative supporting method for surrounding rock of deep well large-section roadway and chamber group

Abstract

The invention relates to a three-shell collaborative supporting method for surrounding rock of a deep well large-section roadway and chamber group. Based on the factors of the section shape, the optimal arrangement axial direction, the section size and aspect ratio, the excavation mode and the soft rock stratum position, the overall arrangement scheme of the deep well large-section roadway and chamber group is preliminarily planned; meanwhile, based on the five principles of preferential arrangement of the main roadway and chamber, parallel arrangement of the main roadway and chamber, mutual perpendicular arrangement of the main roadway and chamber and the auxiliary roadway and chamber, gradual transition of the non-equal-height roadway and chamber, and chamfer transition of sharp corner areas, a deep well large-section roadway and chamber group optimization arrangement scheme is finally formulated; then based on the formulated deep well large-section roadway and chamber group optimization arrangement scheme, the three-shell collaborative supporting method is further formulated, coordinated deformation and unified bearing of a supporting structure and surrounding rock can be achieved through the combined action of a reinforcing bearing shell and a passive bearing shell, and it is ensured that a stress shell is in a steady state; and the problems that the deformation amount of the surrounding rock of the deep well large-section roadway and chamber group is large, and the supporting structure is prone to instability are solved, and long-time stable control over the surrounding rock of the deep well large-section roadway and chamber group is achieved.

Description

technical field [0001] The invention relates to the technical field of deep mining, in particular to a supporting method for the surrounding rock of a large-section roadway group in a deep well. Background technique [0002] At present, the mining intensity of my country's mines is increasing year by year, and the average mining depth is increasing at a rate of 8-12m per year. It can be predicted that deep mining will become the new normal for the development of my country's coal industry and resource development in the future. At the same time, with the gradual development of underground mining, lifting, power supply, drainage, coal preparation and other equipment in the direction of large-scale, intensive, and intelligent, the assembly, maintenance, and placement of these equipment also put forward higher requirements for underground space. The group of deep wells and large cross-section lanes. Due to the joint influence of high ground stress, complex structural stress, a...

AI Technical Summary

Problems solved by technology

Due to the joint influence of high ground stress, complex structural stress, and deep rock rheology, large-section roadway groups in deep mines generally face problems such as large deformation of surrounding rocks and easy instability of support structures, which seriously restrict the safe and efficient mining of deep mines.

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