SYSTEM AND METHOD FOR STABILIZING A MINE
    1.
    发明公开

    公开(公告)号:US20240125235A1

    公开(公告)日:2024-04-18

    申请号:US18046335

    申请日:2022-10-13

    CPC classification number: E21F15/06 E21F15/005

    Abstract: An aggregate slinger for an underground void stabilization system, the aggregate slinger comprising a vertically extending shaft and a number of dispersing members. The vertically extending shaft is inserted through a ground hole into an underground void and rotated about a vertical axis in the ground hole. The dispersing members are configured to extend radially from a lower end of the vertically extending shaft in the underground void so that the dispersing members radially spread aggregate descending into the underground void from the ground hole to form a radially enlarged support column of aggregate in the underground void.

    Plug for a Void, System and Method
    2.
    发明公开

    公开(公告)号:US20240093607A1

    公开(公告)日:2024-03-21

    申请号:US18518400

    申请日:2023-11-22

    CPC classification number: E21F15/005 E21F15/06 E21F15/08

    Abstract: 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.

    Plug for a void, system and method

    公开(公告)号:US11828179B2

    公开(公告)日:2023-11-28

    申请号:US17891920

    申请日:2022-08-19

    CPC classification number: E21F15/005 E21F15/06 E21F15/08

    Abstract: 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.

    METHOD FOR ECOLOGICAL FILLING WITH MIXED COAL GANGUE AND FLY ASH

    公开(公告)号:US20230097415A1

    公开(公告)日:2023-03-30

    申请号:US17800575

    申请日:2021-04-25

    Abstract: A method for ecological filling with mixed coal gangue and fly ash includes the following steps: S1: construction of a double-impermeable base layer: leveling a pit or gully, laying a fly ash-based cementitious material, compacting and curing; spraying a layer of polymer waterproof coating on a surface of the fly ash-based cementitious material, and fully curing to obtain a double-impermeable protective structure; S2: three-dimensional layered filling: dumping coal gangue and fly ash in sequence on the double-impermeable protective structure formed in S1, where the coal gangue and the fly ash are three-dimensionally layered and well graded; the coal gangue is coal gangue after coal washing, which is used as an aggregate; the fly ash is used as a filler and cementitious material to achieve a compact filling structure; and S3: rolling: rolling by a roller after the three-dimensional layered filling.

    Plug for a Void, System and Method

    公开(公告)号:US20220389817A1

    公开(公告)日:2022-12-08

    申请号:US17891920

    申请日:2022-08-19

    Abstract: 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.

    MULTI-FUNCTIONAL PLUGGING AGENT FOR COAL MINE AND PREPARATION METHOD THEREOF

    公开(公告)号:US20220362599A1

    公开(公告)日:2022-11-17

    申请号:US17868037

    申请日:2022-07-19

    Abstract: Provided is a multi-functional plugging agent for a coal mine and a preparation method thereof. The preparation method comprises: by taking Ecklonia Kurome Okam as a raw material, mixing an Ecklonia Kurome Okam suspension with phosphorus pentoxide for reaction, then performing biodegradation to obtain an Ecklonia Kurome Okam biological extract, adding urea for neutralization, mixing a neutralization product with an inorganic catalyst and melamine for reaction to obtain a bio-based plugging synergist solution, finally cooling the bio-based plugging synergist solution, and mixing the cooled bio-based plugging synergist solution with a certain amount of pentaerythritol and ammonium polyphosphate to obtain the multi-functional plugging agent for the coal mine based on the Ecklonia Kurome Okam biological extract. According to the invention, not only a coal crack can be effectively plugged for a long time, but also an efficient flame-retardant effect can be achieved in a complete period of coal spontaneous combustion.

    METHOD FOR RECOVERING ROOM-TYPE COAL PILLARS BY CEMENTED FILLING OF RESERVED ROADWAYS

    公开(公告)号:US20210355826A1

    公开(公告)日:2021-11-18

    申请号:US16613926

    申请日:2018-09-20

    Abstract: Provided is a method for recovering room-type coal pillars by cemented filling of reserved roadways, which is especially suitable for safe and efficient recovery of left coal pillars in room-type mining faces in mining areas where the ecological system is fragile, such as in western China. In the method, by constructing reserved roadways in two adjacent rows of room-type goafs, excavating coal pillar roadways in room-type coal pillars, and finally interconnecting the reserved roadways with the coal pillar roadways to form a U-shaped working face, room-type left coal pillars are recovered. Thus, not only the workload of roadway excavation is reduced, but also the recovery ratio of the coal resources is maximized. The method provides a novel technical model for the recovery of room-type left coal pillars in mining areas, such as in western China.

Patent Agency Ranking