Method for controlling collapse of roof of cantilever beam by liquid explosion
A cantilever beam and liquid explosion technology, which is applied in the field of mine pressure and rock formation control in mining engineering, can solve problems such as cantilever rock mass beams that are difficult to collapse, and achieve the effects of wide application range, high safety, and strong reliability
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[0048] The present invention will be further described with reference to the accompanying drawings.
[0049] The method of controlling the cantilever beam top plate is used, including borehole, hydraulic tube, liquid-explosive hydraulic tube, sealing tube, sealing nip tube, emulsion pump and other means.
[0050] The drilling angle is 60 °, the pores and drilling diameters determines according to the one-shaft compressive strength of the top plate rock body, the plum size is less than 70 MPa, and the pore distance is 6m when the rock mass is less than 70 MPa; the aperture resistance intensity is greater than 70MPa but less than 120MPa, the aperture is φ60mm, the hole distance is 5m; the aperture compressive strength is greater than 120 MPa, the aperture is φ80mm, the hole distance is 4m;
[0051] The hydraulic tube is a rubber material resistant to acid and anti-corrosion, and the expansion ratio of the rubber tube should not be less than 12%, which is not broken when it is greate...
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