Hole sealing device for coal seam water infusion long hole

Abstract

The invention provides a hole sealing device for a coal seam water infusion long hole, which is low in investing and operating cost and comprises a hole packer, an outer limiting board and an inner positioning board which correspond to each other are connected on the hole packer in a closed way, wherein the outer limiting board is close to the head end of the hole packer, and the inner positioning board is close to the tail end of the hole packer, a grouting pipe and an air outlet pipe are connected on the outer limiting board in a closed way, the head end of the grouting pipe and the head end of the air outlet pipe are positioned at the outer side of the outer limiting board, and the tail end of the grouting pipe and the tail end of the air outlet pipe are positioned between the outer limiting board and the inner positioning board; the head end of the hole packer, the head end of the grouting pipe and the head end of the air outlet pipe are respectively connected with a valve in a closed way. The hole sealing device is used for the hole sealing of the coal seam water infusion, by means of the outer limiting board and the inner positioning board, the cavity between the outer limiting board and the inner positioning board is filled to be a mud filling area through the grouting pipe, so that the hole sealing effect is good, and the investing and operating cost is low.

Description

Technical field [0001] The invention relates to a mining device, in particular to a coal seam water injection long hole sealing device. Background technique [0002] At present, the common coal seam water-injection and hole-sealing process in all coal mines is as follows: water is injected into the borehole and penetrated into the coal body through a water injection pipe sealed in the borehole. Hole sealing means to seal the water injection pipe in the borehole. Sealing is a key issue for water injection. To ensure that pressurized water does not leak from the orifice and the coal wall near it, the orifice must be tightly closed and firm under a certain sealing depth. It is generally believed that the plugging depth of water injection boreholes mainly depends on the water injection pressure, the degree of fracture development of the coal seam, the width of the fracture zone of the coal along the edge of the roadway, the performance of the coal seam and the drilling direction. G...

AI Technical Summary

Problems solved by technology

[0004] At present, the sealing measures mainly adopt two methods: manual cement sealing and hole sealing device, but the investment and operation costs are too high

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