A single-channel safe withdrawal method near high-risk coal pillars in short distance without auxiliary roadway

Abstract

The present invention provides a short-distance approaching high-risk coal pillar single-channel safety withdrawal method without auxiliary roadway. The withdrawal method includes the following steps: Step 1. Before stopping mining, support the belt along the groove and the track along the groove on both sides of the working face. support; the tape along the groove and the track along the groove are supported along the front and rear directions of the stoppage line; the tape along the groove is close to the goaf, and the track along the groove is far away from the gob; Mining line; laying multiple rows of anchor cables and bolts; laying anchor rods at the side of the stop production line for support; step 3, when the working face is recovered to the position of the stop production line, the track groove and the coal wall of the working face And the construction of large-diameter drilling in the contact roadway to relieve pressure; step 4, before the working face is withdrawn, use the stress monitoring system and the cuttings method to detect and monitor the early warning; step 5, withdraw the working face equipment. This withdrawal method is not only suitable for large buried depth and strong impact coal seam, but also has good safety.

Description

technical field [0001] The invention belongs to the technical field of mining, and in particular relates to a single-channel safe retraction method for a short-distance non-auxiliary roadway near a high-risk coal pillar. Background technique [0002] The safe withdrawal of working face machinery and equipment is directly related to the normal connection of the mine, and is an important factor affecting the economic benefits of the mine. In the moving technology of deep fully mechanized caving face in my country, conventional moving technology is generally used: when the last few cuts of coal are cut near the stop line of the working face, the shearer and the conveyor move forward as a whole to achieve normal cutting while the hydraulic support keeps Do not move to form enough space for equipment orientation and retraction, and use auxiliary devices such as winches, flatbed trucks, unloading tripods, and iron plates to realize unloading, orientation and installation of fully m...

AI Technical Summary

Problems solved by technology

[0007] The purpose of the present invention is to provide a short-distance single-channel safe withdrawal method without auxiliary roadway near high-risk coal pillars, so as to at least solve the problems of inapplicability of current auxiliary roadway multi-channel retraction technology and large buried depth and strong impact coal seam.

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