Downhole mining, screening, mixing and filling integrated gangue cement structure filling system and method

Abstract

The invention discloses an underground selection, screening and stirring integrated gangue cementation construction filling system and method. The system comprises an underground coal and gangue separating device, an underground gangue crushing and screening device, an underground filling material weighing and stirring device, an underground filling material slurry conveying device, an underground filling material slurry casting device and a PLC control device. The filling method comprises the steps that raw coal mined from a driving working face and a mining working face is transported to a raw coal bunker of a mining area, separated clean coal is transported to a clean coal bunker and is lifted by a main well, separated gangues are fed into a gangue crushing machine, and the gangues undergoing secondary smashing are fed into a gangue screening device; various raw filling materials are respectively fed into a burdening hopper, and filtered mine water is added to obtain filling material pulp through stirring after even and drying stirring; the filling material pulp is transported to a filling working face by a stirring transportation truck, then is cast into a filling formwork by a movable filling pump truck and is evenly vibrated by using a vibration device. By adopting the system and method, the mine transportation and lifting pressure is reduced, the working efficiency is improved, and the mining-filling balance of coal mine waste is achieved.

Description

technical field [0001] The invention relates to an underground mining, screening, mixing and filling integrated gangue cement structure filling system and method, belonging to the field of mine mining; it is suitable for mining mines using cemented filling, especially suitable for gangue cement structure filling mining mines. Background technique [0002] Many coal mines in my country have a large number of "three-down" coal pressing. The traditional caving method is easy to cause damage to the overlying strata and subsidence of the surface, which in turn leads to the destruction of surface vegetation, the drop of groundwater level, and the destruction of the ecological environment. In recent years, with the continuous expansion of filling mining, the environmental problems caused by underground resource mining, including gangue discharge, surface subsidence and groundwater loss, have been well resolved. However, with the continuous consumption of ground gangue by filling an...

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Problems solved by technology

However, with the continuous consumption of ground gangue by filling and mining, the unbalanced mining and filling of solid waste caused by filling mining will increase the cost of filling coal mining, and the mutual interference between coal mining and filling processes will reduce the production efficiency of coal mines. , the use of partial filling can reduce the amount of filling materials, reduce filling costs, and at the same time reduce the time of filling process and improve production efficiency

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