Drift type coal mining filling method

Abstract

The invention discloses a drift type coal mining filling method. The method comprises the following steps of after one drift stoping work is completed, withdrawing a stoping machine, cutting and pulling a groove along a coal layer top plate at the lower side of a stope, cleaning the stope, building red bricks into a filling blockage wall at an entrance of the stope, enabling the filling blockage wall to be lower than the stope, pouring a cement mortar filling material into a filling area of the stope, solidifying the cement mortar to form a layer plate type adhesive body, then further upwards building the filling blockage wall to the height of the stope, and pouring the dewatered watery sand or yellow mud into a residual space above the layer plate type adhesive body of the filling area of the stope. The drift type coal mining filling method has the advantages that a production system of a coal mining well is simplified, the stoping rate of a working surface is favorably improved, the production is more safe and efficient, and the filling and production cost is saved.

Description

technical field [0001] The invention relates to a filling mining method, which belongs to the improvement of the filling method of the layered stope of steeply inclined coal seams, in particular to the method of coal mining filling by way. Background technique [0002] Measured according to my country's proven reserves and annual output of coal, steeply inclined coal seams (coal seams with an inclination angle greater than 45°) account for less than 5% of the total. Coal areas account for a considerable proportion, but they play an important role in the economic development of these provinces and regions, while the proportion of steeply inclined ultra-thick coal seams is even smaller, and the vast majority of coal seams are thin, medium-thick and thick coal seams. [0003] my country's steeply inclined coal seam has the characteristics of complex geological structure and unstable coal seam occurrence. The coal mining face is arranged in the thin to thick coal seam, the workin...

AI Technical Summary

Problems solved by technology

The choice of filling method is mainly controlled by the stability of the surrounding rock in the stope and the cost of filling. For downward coal mining, the filling body of the upper layer will become the roof of the lower layer. The stability of its mechanical coupling with the roof and floor of the coal seam is the decisive factor for the safe production of coal mines. However, the above-mentioned existing approach coal mining method wastes a lot of filling production costs, and the complexity of the underground coal mining system makes the total cost of coal mining still high.

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