Stope rockburst pressure relief prevention method

A blasting pressure relief and rockburst technology, applied in the field of rockburst pressure relief prevention and control in stopes, can solve the problems of small diameter and hole depth of post rock drilling, limited pressure relief range, large amount of excavation engineering, etc. The effect of rock drilling tunnel engineering, large diameter and depth, and large pressure relief range

Inactive Publication Date: 2014-01-22
KUNMING UNIV OF SCI & TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Its disadvantage is that it needs to construct a large number of rock-drilling and cutting roadways, and the amount of excavation is large. The hole diameter and hole depth of the post-rod rock drilling gun are small, and the range of pressure relief is limited.

Method used

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  • Stope rockburst pressure relief prevention method
  • Stope rockburst pressure relief prevention method

Examples

Experimental program
Comparison scheme
Effect test

Embodiment approach 1

[0022] Implementation mode one: if figure 1 and 2 As shown, a deep ore body has an average horizontal thickness of 12 meters and an average inclination angle of 65o. In the figure 1 is the delineated rockburst dangerous area, 2 is the stage transportation roadway, 3 is the vein drilling roadway, and 4 is the beam blast hole. 5 is the boundary of the upper and lower plates of the ore body, and 6 is the charge section of the blast hole. The concrete steps of this implementation mode include:

[0023] (1) Delineate the high-stress area as the rockburst dangerous area, and carry out blasting and pressure relief; firstly, conduct rock mechanics experiments to analyze the rockburst tendency of the rock mass in the engineering area, and obtain the stress distribution law through the three-dimensional stress measurement method in the engineering area, and divide Out of the high stress area, predict the specific location where rockburst may occur in the project area, and use it as an...

Embodiment approach 2

[0028] Embodiment 2: The stope rockburst pressure relief prevention and control method of this embodiment is:

[0029] (1) Delineate the high-stress area as the rockburst dangerous area, and carry out blasting and pressure relief; firstly, conduct rock mechanics experiments to analyze the rockburst tendency of the rock mass in the engineering area, and obtain the stress distribution law by means of three-dimensional numerical simulation in the engineering area. In the high-stress area, predict the specific location where rockburst may occur in the project area, and use it as an area for rockburst pressure relief.

[0030] (2) At the stage where the blasting pressure relief area is located, the rock-drilling roadway is transported horizontally, and the rock-drilling roadway is a roadway that meets the working requirements of rock-drilling equipment, and the cross-sectional specification is 3×3.3 meters;

[0031] (3) Drill cluster blastholes with a diameter of 80mm and a depth o...

Embodiment approach 3

[0034] Embodiment 3: The stope rockburst pressure relief prevention and control method of this embodiment is:

[0035] (1) Delineate the high-stress area as the rockburst dangerous area, and carry out blasting and pressure relief;

[0036] First, rock mechanics experiments were carried out to analyze the tendency of rock mass rockburst in the project area. Through three-dimensional ground stress measurement in the project area, three-dimensional numerical simulation and other means, the stress distribution law was obtained, and high-stress areas were divided to predict the possibility of rockburst in the project area. The specific location is used as an area for rock burst pressure relief.

[0037] (2) At the stage where the blasting pressure relief area is located, the rock-drilling roadway is transported horizontally, and the rock-drilling roadway is a roadway that meets the working requirements of rock-drilling equipment, and the cross-sectional specification is 3.5×4 meter...

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Abstract

The invention relates to a stope rockburst pressure relief prevention method, and belongs to the technical field of underground mining. A high-stress rockburst dangerous area is firstly delineated as a burst pressure relief area, a horizontal construction rock drilling tunnel is then conveyed in the section where the burst pressure relief area is located, cluster-shaped blast holes with the diameter of 80-200mm and depth of 15-60m are drilled in rockburst rock mass, under the condition of uncompensated space, explosives are added to the blast holes to perform burst, and pressure relief in the rockburst dangerous area is completed. According to the method, drilling burst is directly performed on the rockburst dangerous area, high stress in the rock mass is relieved, and rockburst danger is eliminated.

Description

technical field [0001] The invention relates to a stope rockburst pressure relief prevention method, which belongs to the technical field of underground mining. Background technique [0002] With the increase in demand for resources and the continuous increase in mining intensity, shallow resources are decreasing day by day, and many mines at home and abroad have gradually entered the state of deep resource mining. Under the conditions of deep and high geostress mining, dynamic disasters such as rockbursts are increasing day by day. Rockburst directly threatens the safety of construction personnel and equipment, affects the progress of the project, and becomes a major geological disaster in deep mining. How to reduce or eliminate rockburst dynamic disasters caused by stress changes in surrounding rocks is an urgent problem to be solved in the safe mining of deep resources. Therefore, continuous exploration and improvement of rockburst prevention methods are of great signif...

Claims

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Application Information

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IPC IPC(8): F42B3/00
Inventor 周宗红强红萍杨安国王昌王海泉
Owner KUNMING UNIV OF SCI & TECH
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