A method of pulse operation to control the floor drum of roadway

Abstract

A method for controlling the floor drum of a roadway by pulse operation, in which a row of obliquely arranged drill holes are respectively arranged at a certain interval at the junctions between the sides of the roadway and the floor on the left and right sides of the roadway; ; Obtain the pressure and displacement information data of deep rock formations at different depths in turn until the entire drilling process is completed; the data acquisition instrument can be used for the later floor according to the obtained pressure and displacement information data in the drilling, combined with the compression deformation. Formulate reasonable parameters for fracturing; use the electric pulse device to perform fracturing operations on the drilled holes on the floor of the roadway; observe the range of shock wave fracturing, and after the expected effect is achieved, take out the electric pulse device and carry out the impact operation of the next adjacent drilling hole , until the fracturing operation of the entire roadway floor is completed; the drilling and fracturing operation on the other side of the roadway floor is completed; and the grouting bolt reinforcement is performed later. This method has high detection accuracy, fast bottom cutting speed and good repair 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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