Method for topping and entry remaining of tunneling-along-top ultrahigh mining roadway for inclined thick coal seam

Abstract

The invention relates to a method for topping and entry remaining of a tunneling-along-top ultrahigh mining roadway for an inclined thick coal seam. The method adopts a staged combined tunneling and control technology, and specifically comprises the steps that the mining roadway is tunneled, and bolt-mesh-anchor combined supporting is adopted; before the working face is mined, topping anchor cables and topping drills are formed for the mining roadway in front of the working face, dinting extended brushing of the fracture is conducted, roadside supports are supplemented, meanwhile, a mesh is hug on the high side, and a single hydraulic prop, a hinge top beam, a U-shaped steel shed and wood cribs are arranged for the roadway to reinforce the supporting; and during mining of the working face, anchors on the high side are removed, trianglecoal at the tip is recovered, a mesh is laid after a framework and connected with the mesh on the high side, topping and entry remaining are formed, and reuse is achieved. The method is simple and easy to implement, the effect that the supporting structure prevents pushing over and coal side spalling can be effectively achieved, roadway reuse and recovery of supporting materials are achieved, the recovery rate of the trianglecoal at the tip is increased, the production cost is reduced, and good economic and social benefits are achieved.

Description

technical field [0001] The invention relates to coal mine mining and roadway excavation and support technology, in particular to a method for excavating a super-high mining roadway along the top of an inclined thick coal seam by cutting the top and retaining the roadway. Background technique [0002] Gobside entry retaining, as a layout method without coal pillars, has the advantages of improving the recovery rate of coal resources, reducing the rate of roadway excavation, and alleviating the tension of continuous excavation at the working face, etc., and is widely used in coal mine production. However, for gob-side entry retention in high gassy thick coal seams, in order to facilitate the mining of the working face, the mining roadway is often excavated along the bottom, which can easily cause problems such as gas accumulation in the upper corner and roof sinking, which has brought serious problems to mine safety. challenge. If the method of tunneling along the top is adop...

AI Technical Summary

Problems solved by technology

However, for gob-side entry retention in high gassy thick coal seams, in order to facilitate the mining of the working face, the mining roadway is often excavated along the bottom, which can easily cause problems such as gas accumulation in the upper corner and roof sinking, which has brought serious problems to mine safety. challenge

If tunneling along the top is adopted, there will be a large loss of triangular coal at the end of the working face, which will increase the loss of coal resources

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