Gob-side entry retaining reinforced filling body structure and filling method thereof

Abstract

The invention discloses a gob-side entry retaining sufficient roof contact reinforced filling body structure and a filling method thereof. The reinforced filling body structure comprises a filling bag, a reinforcing structure and formwork protecting reinforcing meshes, wherein the filling bag is provided with feeding filling ports for filling feeding and exhaust ports for exhausting, the reinforcing structure is arranged in the filling bag and used for reinforcing the filling body, and the formwork protecting reinforcing meshes are arranged around the filling bag in a surrounding manner. The reinforced filling body structure is characterized that the filling bag further comprises an isolation unit inside the filling bag, the isolation unit isolates slurry in the upper portion and the lower portion of an inner cavity of the filling bag, the isolation unit is obliquely arranged in the filling bag, the isolation unit is fixedly connected with the filling bag and can deform along with opening of the filling bag, an isolation face is formed after deformation, and the isolation surface divides the inner cavity of the filling bag into a first filling cavity positioned at the upper part and a second filling cavity positioned at the lower part.

Description

Technical field[0001]The present invention relates to the technical field of bypassing the mechanized construction lane, in particular, for a strengthening of the filling body structure and filling thereof along the empty lane.Background technique[0002]Along along the empty lanes are two uses of roadways, which greatly improves resource recovery rates, alleviating the mining replacement, and is a major reform of coal mine mining and returning roadway arrangement technology. After entering the deep mining, the mine pressure has exacerbated, the roadway is negative, there is a large variation of the filling bodies along the empty lane, and the load failure is increasing, especially during the lexicone, the top of the roadside, the top of the roadside, the roof effect is extremely Poor, thereby further exacerbating its degree of deformation. Therefore, the roof effect and filling body support along the middle alley in the airway are the key to maintaining the stability of the roadway.[...

AI Technical Summary

Problems solved by technology

However, due to the gravitational effect of the slurry itself, the quick-setting effect of the slurry, and the coal cutting during the mining of the working face, the flatness of the floor in the gob-side entry retaining area is poor, and there will be a certain inclination angle overall, that is, the roadway The bottom plate has a certain inclination angle along the radial direction of the roadway, which causes the liquid level of the filling body next to the roadway to be approximately hump-shaped during filling, resulting in a gap between the entire filling body (especially the middle of the filling body) and the roof when the roof is connected later.

The reason is that during the grouting process of the grouting hole above the filling body, due to the grout's own weight and the flow of the slurry, the left and right sides of the filling body will inevitably be higher than the middle part, and the filling body must play a full supporting role. , it must be that the middle core area has a strong load-bearing effect, and the previous operation could easily lead to the failure of the middle core area of ​​the filling body to be fully connected to the top, which in turn reduces the overall bearing capacity of the filling body and ultimately affects the stability of the roadway

When the working face advances to the distance of the initial pressure, the collapse of the roof may easily cause the filling body to be crushed instantly, which brings great safety hazards to the working face

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