Method for relieving pressure of surrounding rock of rock burst roadway

Abstract

The invention provides a method for relieving pressure of surrounding rock of a rock burst roadway. The method comprises the following steps of: horizontally arranging a drill hole in each of the upper parts on the left side and the right side of the roadway; detecting the drill holes by using a drill hole penetrometer to obtain pressure conditions and displacement information data of different depths; analyzing the stress conditions of the upper parts at different depths by using a data acquisition instrument according to the obtained information data of pressure and displacement in the drillholes, and determining the pressure relieving depth of a kerf; arranging a row of drill holes in the middle of the vertical surfaces of the upper parts on the left side and the right side of the roadway at certain intervals according to the obtained kerf depth; operating the drill holes in a bottom plate of the roadway by using an electric pulse device to perform fracturing operation; after an expected effect is achieved, taking out the electric pulse device, and performing impact operation of the next adjacent drill hole until the fracturing operation of the upper parts of the whole roadwayis completely finished; finishing the fracturing operation of the drill holes in the other side of the bottom plate of the roadway; and grouting and reinforcing the fractured surfaces of the upper parts of the roadway. The method is high in detection precision, high in kerf speed and good in pressure relieving effect.

Description

Technical field[0001]The invention belongs to the technical field of prevention and control of rock bursts in mine roadways, and specifically relates to a pressure relief method for surrounding rock of rock bursts.Background technique[0002]At this stage, coal mining in my country is mainly in the mode of underground mining. For deep tunnels, especially kilometer deep wells, rock bursts of different intensities have brought greater harm to the safety of mine production. Therefore, the prevention and control of rock bursts is One of the main problems of deep well mining. In the process of underground mining, the roadway will appear strong shock pressure. The impact of rock bursts in the main roadway will cause large deformations and even damage to the roadway. At present, for the prevention and control of roadway rock burst, there are mainly drilling pressure relief methods, excavation pressure relief roadways, hydraulic fracturing and blasting pressure relief methods. These tradition...

AI Technical Summary

Problems solved by technology

However, because the original borehole penetrating method has only a single probe on the probe to detect the surrounding rock of the borehole, not only the test orientation is deviated during detection, but also the test data is not accurate enough.

In terms of floor control, the traditional roof blasting method has disadvantages such as high explosive consumption, danger, and large power disturbance.

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