Onboard continuous grooving pressure relief coal mining equipment and onboard continuous grooving pressure relief coal mining method

Abstract

The invention discloses onboard continuous grooving pressure relief coal mining equipment and an onboard continuous grooving pressure relief coal mining method. The equipment comprises a coal mining machine, an ascending and descending device and a cutting device, wherein a triangular frame is arranged in front of an electric control box of the coal mining machine; a fixing plate is fixed on the electric control box and the triangular frame; the ascending and descending device is arranged on the fixing plate; an operation table capable of ascending and descending is arranged in the middle of the ascending and descending device; the cutting device is arranged on the operation table; a cutting drill pipe is arranged in the cutting device; in the coal cutting walking process of the coal mining machine, a long groove is cut in front of the coal wall by the cutting drill pipe; the continuity of a coal body is cut by the cut long groove; the exposure area of the coal body is increased, so that the coal body around the long groove realizes the pressure relief; the stress gradient is reduced; the elastic potential energy accumulated in the coal bed is released; and a stress concentration region continuously moves to the deep part of the coal body. After a pressure relief groove is dug, a continuous and stable pressure relief region along the production working face inclination direction (trend) can be formed in front of the working face, so that the occurrence of coal and gas outburst and the rock burst can be effectively prevented; and the continuous and stable operation of the coal mining machine can be ensured.

Description

technical field [0001] The invention belongs to the technical field of trough formation and pressure relief in coal mining working faces, and in particular relates to a fully mechanized coal mining face coal cutting and trough formation pressure relief, detection of coal seam structure, prevention of coal and gas outburst and rock burst integration equipment with method. Background technique [0002] Coal and gas outburst and rock burst are one of the serious natural disasters that often occur in the production process of outburst mines and impact mines. In recent years, with the continuous increase of mining depth, the ground stress and gas pressure have been increasing, and the geological conditions and technical conditions of coal mining have become increasingly complex. The number and intensity of coal and gas outbursts and rock bursts in the mining face have gradually increased. Big. Due to the concentration of personnel and complex machinery and equipment in the mini...

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Problems solved by technology

However, water injection in coal seams usually takes a long time, and it cannot be constructed when encountering geological structures such as faults. Simple pressure relief blasting will inevitably cause disturbances, which may easily cause rock bursts induced by human factors.

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