Roadway heaving floor control method through pulse operation

Abstract

The invention relates to a roadway heaving floor control method through pulse operation. The method comprises the following steps that a row of inclined drill holes are formed at each of two joints ofside parts and bottom plates on the left side and the right side of a roadway at a certain interval; the drill holes are detected by using a drill hole penetrometer; pressure conditions and displacement information data of deep rock stratums with different depths are obtained in sequence until the whole drill hole detection process is completed; according to the obtained drill hole inner pressureand displacement information data, in combination with the compression deformation condition, a data acquisition instrument can formulate reasonable parameters for later-period bottom plate fracturing; an electric pulse device is used for conducting fracturing operation on drilled holes in a roadway bottom plate; a shock wave fracturing range is observed, after the expected effect is achieved, the electric pulse device is taken out, and impact operation of next adjacent drill hole is conducted until the whole roadway floor fracturing operation is completely finished; drilling fracturing operation on the other side of the roadway bottom plate is completed; and later-period grouting anchor rod reinforcement is conducted. The method is high in detection precision, high in bottom cutting speed and good in repairing effect.

Description

technical field [0001] The invention belongs to the technical field of roadway floor drum control in coal mines, and in particular relates to a method for controlling the roadway bottom drum by pulse operation. Background technique [0002] At present, my country's coal mining is mainly in the underground mining mode. In this mode, the hard roof is one of the main factors for the strong mine pressure in the stope. In the process of underground mining, strong mine pressure will appear in the roadway. The occurrence of strong mine pressure in the roadway is mainly due to the extrusion of the side of the roadway to the floor, that is, the problem of extrusive floor heaving. This is mainly because the side and roof rock formations are complete, and the floor is a weak rock formation, so the stress concentration of the floor is high and prone to occurrence The bottom plate bulges, and its support is difficult, the maintenance cost is too high, and it is even difficult to maintai...

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.

In terms of roadway repair and reinforcement, the traditional artificial leveling repair, rigid body pillar support and traditional anchor rod reinforcement are usually used. These methods have disadvantages such as high cost, time-consuming and labor-intensive, and poor support effect.

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