The present invention relates to a clean and efficient coal mining method, which is applicable to the field of solid waste treatment in mines. The method is characterized in: the width of short-segment working faces is designed according to the discharge volume of solid wastes produced in a mine, including downhole gangue and surface coal ash; first, two adjacent short-segment working faces are mined and backfilled, and the edges of the filling face and the solid coal side are supported with anchor rods while roadways are retained; the roadways retained at the two short-segment working faces and the coal mass in the middle constitute a long-segment working face mining system; the long-segment working face is mined, the short-segment backfilled working faces at the two sides are mined and backfilled at the same time, and the gangue produced at the long-segment working face is transported to the short-segment working faces to fill, so that a continuous mining system that consists of backfill mining at short-segment working faces and efficient stopping at long-segment working faces is realized. The method provided in the present invention can deal with all surface and downhole solid wastes in a mine, reduces the cost of gangue treatment, and mitigates damages to the ecological environment; besides, the method utilizes solid wastes to fill the gobs to form roadways, eliminates coal pillars and improve resource recovery rate.

Treatment technology directed to using mine waste as a raw material to manufacture a mine filling product for use as a suitable precursor product or mine filling product to be used as a backfill material to close a mine. The precursor product or mine filling product retains its metals and is not be able to generate acidity. According to the disclosure, the precursor product or mine filling product, when placed in a mine, may also remove metals from mine fluids in the mine it contacts, and still retain the metals it hosted when it was a mine waste prior to it being used as a raw material to manufacture the precursor stowing backfill product.

A cement silo and feed apparatus for feeding cement to the cement silo of a mining machine includes a receptacle for receiving cement, a transfer tube connected at a first end of the receptacle for guiding the cement from the receptacle to the cement silo connectable at a second end of the transfer tube and transfer means arranged in connection with the transfer tube and arranged to move cement within the transfer tube from the receptacle to the cement silo. The transfer tube includes at least one transfer tube section having a tube-like inner space for cement to be transferred.

A system and a method are provided for drilling pathways to mine for solid natural resources from an elevated terrain. The system includes a drill bit, at least one reamer, and a diverter. The drill bit allows for drilling into a seam of natural resource that is found within a mountain. The at least one reamer enlarges a transversal access hole that is drilled to access the seam of natural resource. The diverter separates cuttings from any waste material as the cuttings are excavated from the seam of natural resource. There are two methods that can be used to mine for solid natural resources from an elevated terrain. The typical auger method drills transversal access holes directly into the seam of natural resource. The directional engineering auger method drills the transversal access hole from a diagonal wellbore into the seam of natural resource.

The present invention discloses a mine exploitation, separation and filling and X exploitation mode, including four “exploitation, separation and filling and X” exploitation modes, namely an “exploitation, separation and filling and retaining” exploitation mode, an “exploitation, separation and filling and treatment” exploitation mode, an “exploitation, separation and filling and extraction” exploitation mode, and an “exploitation, separation and filling and control” exploitation mode. The selection of the “exploitation, separation and filling and X” exploitation mode is determined by actual engineering needs. A goaf filling rate is designed to meet the actual engineering needs of the mine, solve the technical problems in mine resource exploitation, and realize the objective of green, harmonious and safe exploitation of coal resources. Compared with an original “exploitation, separation and filling” exploitation mode, the “exploitation, separation and filling and X” exploitation mode is more systematic and comprehensive and is beneficial to engineering promotion and application.

The present invention discloses a mine exploitation, separation and filling and X exploitation mode, including four “exploitation, separation and filling and X” exploitation modes, namely an “exploitation, separation and filling and retaining” exploitation mode, an “exploitation, separation and filling and treatment” exploitation mode, an “exploitation, separation and filling and extraction” exploitation mode, and an “exploitation, separation and filling and control” exploitation mode. The selection of the “exploitation, separation and filling and X” exploitation mode is determined by actual engineering needs. A goaf filling rate is designed to meet the actual engineering needs of the mine, solve the technical problems in mine resource exploitation, and realize the objective of green, harmonious and safe exploitation of coal resources. Compared with an original “exploitation, separation and filling” exploitation mode, the “exploitation, separation and filling and X” exploitation mode is more systematic and comprehensive and is beneficial to engineering promotion and application.

Disclosed is a paste for use in mining processes, such as backfilling and cemented rock fill, to provide improved early and late-stage strength at a lower overall cost. The paste includes mine tailings, one or binding agents, engineering backfill and water. The engineering backfill fibers are typically plastic fibers obtained from plastic products, partially plastic products, recycled plastic products, or partially recycled plastic products. Also disclosed are methods of backfilling a portion of a mine and uses of the paste in mining processes.

A plug for a void in a mine to divert water having a rigid closed cell foam which fills the void. The rigid closed cell foam having a plurality of pipes disposed within the foam. The pipes distributed throughout the void. The pipes are positioned in the foam so the pipes are staggered in length vertically with respect to various heights in the void, and the pipes are positioned in the foam every 4′ to 6′ horizontally with respect to the void. Each pipe has a mixing stick. A method for diverting water from a void in a mine.

The present invention relates to method for filling deformable karst cave, and the steps are: penetrating a grouting pipe into an elastic silicone tube, penetrating the grouting pipe and the elastic silicone tube into a deformable bracket, and lowering into a karst cave; sealing the elastic silicone tube, injecting silicate resin materials into the grouting pipe, and injecting steel fiber reinforced grout to implement a block stone-like structure; sealing the elastic silicone tube, separating the block stone-like structure from the elastic silicone tube to complete a block stone-like structure; lowering the elastic silicone tube and the deformable bracket, sealing the elastic silicone tube, lowering the elastic silicone tube and the deformable bracket tore construct the block stone-like structure, and completing the filling. The present invention may effectively stabilize the karst cave, ensure safe tunnel construction and stable surrounding rocks, and improve engineering construction speed.

Treatment technology directed to using mine waste as a raw material to manufacture a mine filling product for use as a suitable precursor product or mine filling product to be used as a backfill material to close a mine. The precursor product or mine filling product retains its metals and is not be able to generate acidity. According to the disclosure, the precursor product or mine filling product, when placed in a mine, may also remove metals from mine fluids in the mine it contacts, and still retain the metals it hosted when it was a mine waste prior to it being used as a raw material to manufacture the precursor stowing backfill product.