Caving coal mining roadway grouting anchor cable supporting structure and advanced supporting method thereof

Abstract

The invention discloses a caving coal mining roadway grouting anchor cable supporting structure and an advanced supporting method thereof. The advanced supporting method of the caving coal mining roadway grouting anchor cable supporting structure includes following steps: step 1, confirming at least one mining roadway to be supported on a current mining face, wherein setting perpetual support on atop plate and two sides of each mining roadway, and using combined anchor-bolt and net support as the perpetual support due to the fact that each mining roadway is dug in advance and the perpetual support is performed in the digging process,; and step 2, performing advanced support on each mining roadway, wherein at the same moment of mining the mining face, constructing anchor cable holes everyother row of anchor bolts in the advancing direction and on the top plate of each mining roadway, mounting grouting anchor cables and anchor trays in the anchor cable holes while constructing the anchor cable holes, and using locksets for pre-tightening. The advanced supporting method of the caving coal mining roadway grouting anchor cable supporting structure and the advanced supporting method thereof have the beneficial technological achievements of 1) greatly improving supporting efficiency on the premise of guaranteeing safe mining; 2) greatly saving the space area of each mining roadway;and 3) being simple in structure, convenient to operate and low in cost.

Description

technical field [0001] The invention relates to the field of active advanced support for a top coal caving recovery roadway, in particular to a grouting anchor cable support structure for a top coal caving recovery roadway and an advanced support method thereof. Background technique [0002] The top-coal caving mining method is the main method for mining thick coal seams at present in my country. When mining near-horizontal, gently inclined or mid-inclined coal seams, the coal of the longwall working face at the bottom of the coal seam is mined first, and then the upper top coal is mined. method. Generally speaking, the strength of the coal seam mined with top-coal caving is low, and the fractures in the coal body are relatively developed, and the mining roadway of the working face is arranged along the lower part of the thick coal seam, and the roadway is surrounded by coal seams with low strength. The range is large, and the range of influence on the roadway is large, and ...

AI Technical Summary

Problems solved by technology

[0004] The purpose of the present invention is to provide a top-coal mining roadway grouting anchor cable support structure and its advance support method to solve the problem of low construction efficiency, high labor intensity and high support cost in the current top-coal mining roadway support The problem

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