Method for supporting roadway with rock burst risk based on double-quilt-cylinder protection theory

Abstract

The invention provides a method for supporting a roadway with a rock burst risk based on a double-quilt-cylinder protection theory, and relates to the technical field of rock burst prevention and control and roadway supporting. The method comprises the steps that when the roadway is tunneled to an area with the rock burst risk, a pressure relief mode and pressure relief parameters are determined according to mining conditions and geological conditions, three-dimensional pressure relief is conducted on a lagging tunneling face or an advance roadway, and a pressure relief and energy absorption quilt cylinder is formed; and according to the coal seam thickness, the roof thickness and the roadway section size, the anchor rod type, the anchor rod row spacing, the anchor cable type and the anchor cable row spacing are determined, the supporting safety coefficient is calculated, the integrity of primary supporting of the roadway is strengthened through an anchor net, anchor rods and anchor cables, and a supporting quilt cylinder is formed. By means of the method, the pressure relief and energy absorption quilt cylinder is formed to form a yielding structure, and the supporting quilt cylinder guarantees the supporting strength. The double-quilt-cylinder structure achieves overall stress and overall shrinkage yielding of the roadway, so that the stability of surrounding rocks is improved, and rock burst is effectively prevented.

Description

technical field [0001] The invention relates to the technical field of rock burst prevention and roadway support, in particular to a rock burst dangerous roadway support method based on the double-quilt protection theory. Background technique [0002] Rock burst is a typical dynamic disaster faced by deep mining of coal mines. It is characterized by the sudden and violent release of elastic energy accumulated in the coal rock mass, and the power throws the coal rock to the roadway or stope, causing strong vibration and damage to the coal rock mass and equipment. damage and casualties. Field practice also shows that the damage and casualties caused by rock bursts are mainly concentrated in the roadway. [0003] The support of the roadway is to ease and reduce the movement of the surrounding rock, so that the section of the roadway will not be excessively reduced, and at the same time prevent the scattered and damaged surrounding rock from falling. Strengthening the support ...

AI Technical Summary

Problems solved by technology

[0004] The existing roadway support methods are difficult to ensure the integrity of the surrounding rock of the roadway through one-time strong support, especially when digging roadways in stress-concentrated areas, and the roadway is in a dangerous area of ​​rock burst

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