Device for increasing face width of forepolings during working face for recovering main roadway coal pillars passing through empty roadway

Abstract

The invention aims to provide a device for increasing the face width of a forepoling during working face for recovering a main roadway coal pillar passing through an empty roadway. Front beams are connected with top beams, and caving shields are connected with the top beams in a hinged mode; the upper end heads of connecting rods are connected with the caving shields in a welding mode, and the lower end heads of the connecting rods are connected with support bases in a hinged mode; the upper end heads of stand columns are connected with the top beams, and the lower end heads of the stand columns are connected with the support bases; and pier columns are connected with the support bases through oil cylinders, and pier column gangue blocking plates are welded to column bodies of the pier columns. Finally, through linkage cooperation of the pier columns and other components, the supporting position is reasonably adjusted, the face width is increased, and on the basis that the normal supporting effect of the forepolings is guaranteed, the purpose that the roof suspension problem when the working face passes through the empty roadway is effectively solved, the face width of main roadways is increased, roof management is perfected, and the stability of the roadways are practically guaranteed.

Description

technical field [0001] The invention belongs to the technical field of advance support of coal mine roadway, and in particular relates to a device for increasing the distance control of the top by recovering the advance support of the coal pillar working face of the roadway through the empty roadway. Background technique [0002] Coal is the main energy source in our country. In the process of coal mining, fully recycling coal resources and reducing the loss of coal resources can promote the healthy development of the mining economy. As one of the main contents of recovery and utilization of underground coal resources - the recovery and utilization of roadway protection coal pillars has huge economic value and practical significance. In actual production work, because both sides of the roadway coal pillar recovery working face have been mined out and will pass through the goaf, it usually leads to severe mine pressure. Empty roadways are supported by advanced supports. The ...

AI Technical Summary

Problems solved by technology

In actual production work, because both sides of the roadway coal pillar recovery working face have been mined out and will pass through the goaf, it usually leads to severe mine pressure. Empty roadways are supported by advanced supports. The forward direction of the advanced supports is consistent with the forward direction of the working face. There will be a large area of ​​empty roof above the top beam of the last group of advanced supports in the main road, resulting in the inability to carry out timely and effective support. It has an adverse effect on roof control, and roof leakage accidents occur from time to time

[0003] When the working face passes through the superelevation section of the wind bridge of the main transport nose, the support height of the support required here varies greatly, and the maximum support height and the minimum support height are quite different, resulting in the leading support below the superelevation section can not achieve complete topping

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