Degradation effect control method for weak-cementation strong-expansion high-water-rich soft rock

Abstract

The invention relates to the technical field of mineral exploitation, in particular to a degradation effect control method for weak-cementation strong-expansion high-water-rich soft rock. The method comprises the following steps that drainage is conducted in the tunneling working process; top plate water spraying, bottom plate water seepage and production water are managed in the production process, and water is prevented from making contact with rocks; and reinforced support is carried out on a roadway. By means of massive water prevention and control, small water volume management and reinforced support as well as cooperative management of massive water prevention and control, small water volume management and reinforced support, the water yield condition of a stratum and the water catchment time condition of a separation space can be changed through massive water prevention and control, the source treatment effect is obvious, water disasters are avoided, and then the coal mining efficiency is improved; and through small water volume prevention and control, a tunneling working face is not troubled by water any more, the tunneling working face does not return to a rear way for repair during tunneling, and the monthly tunneling footage is stably improved under the condition that the mechanization degree is not obviously improved. The deformation of the roadway is effectively controlled through reinforced support and collaborative management.

Description

technical field [0001] The invention relates to the technical field of mineral mining, in particular to a method for controlling the deterioration effect of weakly cemented, strongly expansive, high-water-rich soft rock. Background technique [0002] The early and middle Jurassic coal fields in Northwest China have many coal layers, large thickness, and rich resources. They are one of the important strategic coal bases in my country. However, during the production and construction process, a large number of weakly cemented expansive soft rock projects have been encountered. problem. The softening and muddying caused the bottom of the fully mechanized mining support to sink, the rapid bottom drum lifted the scraper machine, and the bottom drum of the roadway required repeated manual lifting. The cumulative bottom lifting amount was as high as 20.6m, which seriously restricted the production efficiency. The International Society for Rock Mechanics defines soft rock as rock mas...

AI Technical Summary

Problems solved by technology

However, most of the previous research objects were high-stress soft rocks or expansive soft rocks that were not rich in water. The engineering measures were devoted to the deformation control of the floor heave of the roadway, but did not solve the problem of mining engineering deterioration; the engineering support focused on solving the engineering force problem, The impact of water-rock interaction in the dual-phase medium of rock mass is ignored; the expansive soft rock has poor permeability, and the operability of blocking water incentives through grouting is not strong, and the core control concept and complete system have not been formed. Technology System

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