Method for reinforcing return channel

Abstract

The invention relates to a method for reinforcing a return channel. The method comprises the following steps: (1) supporting a roof by utilizing anchor stocks, anchor cables, mesh reinforcements, steel beams, single struts and double-row cribworks jointly; and (2) and injecting Marithan into the roof to solidify the roof. By utilizing the anchor stock-anchor cable-mesh reinforcement-steel beam-single strut-double row cribwork joint support mode, the invention reasonably optimizes the support parameters, thereby ensuring the support strength of the return channel; and by using the Marithan product, the invention effectively enhances the support strength of the coal body, thereby achieving the goal of reinforcing the treated region. The method of the invention greatly ensures the safety andenhances the economic benefit. In addition, the invention has the advantages of simple process, convenient operation and low requirements for on-site construction, and can quickly and efficiently reinforce the roof and effectively support the roof.

Description

technical field [0001] The invention relates to a reinforcement method for a retraction channel, in particular to a reinforcement method for a retraction channel of a fully mechanized mining face in the process of coal mining. Background technique [0002] For underground coal mines (non-open-pit coal mines), if the stratum of the coal mine is a layered structure and is dominated by weak rock formations, it usually encounters the problem of high shale content, shale and calcareous cementation in the rock. That is to say, the roof strata are dominated by fine-grained sandstone and siltstone, and there may be sandy mudstone locally, while the floor strata are dominated by sandy mudstone. [0003] Under the above geological conditions, the roof and floor rock layers themselves are extremely easy to weather and break, which in turn aggravates the instability of the roof and floor rock layers. Especially affected by mining, part of the roof of the roadway may drop, crack, and su...

AI Technical Summary

Problems solved by technology

In particular, in the prior art, when the fully-mechanized mining face reaches the stop production line, the roadway pressure increases, the withdrawal channel sinks as a whole, the roof is broken, the roof caving is serious, the equipment is difficult to withdraw, and supporting materials such as wood The amount of equipment used is doubled, and the efficiency of moving and reversing is reduced. In severe cases, the equipment will be crushed and cannot be retracted, and there is no guarantee for safety.