A ground pressure management method suitable for deep mining in underground mines

Abstract

The invention discloses a ground pressure management method suitable for underground mine deep mining. The method comprises the steps that 1) a ground pressure appearance law is researched and revealed, and a stress elevating area, a stress lowering area, a tension stress area and a rock movement angle in underground mine rocks are obtained; 2) a horizontal roadway cutting and vertical groove cutting mode is adopted in the underground mine rocks, and stress in a mining area is guided to transfer; 3) high stress in the mining area is adopted for spallation, impact disaster hidden dangers of the concentrated stress on a top plate of a worked out section are eliminated, and meanwhile a covering layer which is required by back mining is formed; 4) the modes such as inner strengthening and outer supporting are adopted to support a back mining roadway. According to the ground pressure management method, aiming at rock engineering characteristics, the adjustment of the rock stress state and the comprehensive utilization of the ground pressure are taken as core thoughts, the ground pressure dynamic cycle management of ground pressure law studying (Study)-ground pressure transfer guiding (Transfer)-ground pressure spallation using (Use)-ground pressure emergence controlling (Control) is achieved, the efficiency is greatly improved, and the safety is effectively guaranteed.

Description

technical field [0001] The invention relates to a ground pressure management method for rock mass engineering, in particular to ground pressure management during deep mining of underground mines, and can be widely used in rock mass underground projects such as mines, tunnels, and subways. Background technique [0002] In underground mining of ore deposits, stope pressure management is one of the production processes. Its purpose is to prevent the surrounding rock in the mining work space from moving out of control and threatening the work safety of personnel. It is of great significance to correctly choose the method of stope ground pressure management during mining. [0003] Before excavation, the underground rock mass of the mine bears the weight of the overlying strata and other forces and is in a balanced state, which is called the original stress balance state. Once the ore mass is excavated or there is an excavation project nearby, its original stress balance state w...

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Problems solved by technology

[0006] Although the above literature and other existing achievements have proposed some methods for analyzing the law of ground pressure, controlling ground pressure and unloading mining, these management modes of ground pressure are obviously lacking in systematicness and dynamics, and do not fully reflect the characteristics of rock mass in rock mass engineering. Inherent specificity and complexity of dynamic changes in stress field during excavation

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