公开(公告)号：US20240125235A1

公开(公告)日：2024-04-18

申请号：US18046335

申请日：2022-10-13

Applicant: Drill Tech Drilling & Shoring, Inc.

Inventor： Patrick Hugh Carr ,  Clay Robert Rathbun

IPC: E21F15/06 ,  E21F15/00

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.

公开(公告)号：US20240093607A1

公开(公告)日：2024-03-21

申请号：US18518400

申请日：2023-11-22

Applicant: Joshua Stephen Behling

Inventor： Joshua Stephen Behling

IPC: E21F15/00 ,  E21F15/06 ,  E21F15/08

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.

公开(公告)号：US11828179B2

公开(公告)日：2023-11-28

申请号：US17891920

申请日：2022-08-19

Applicant: Joshua Stephen Behling

Inventor： Joshua Stephen Behling

IPC: E21F15/06 ,  E21F15/08 ,  E21F15/00

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.

公开(公告)号：US11795106B2

公开(公告)日：2023-10-24

申请号：US17800575

申请日：2021-04-25

Applicant: SHANXI UNIVERSITY

Inventor： Fangqin Cheng ,  Jianfang Wu ,  Huiping Song ,  Peihua Zhang

IPC: C04B18/12 ,  E02D31/00 ,  E21F15/00 ,  C04B24/26 ,  C04B28/02 ,  C04B28/04 ,  C04B28/08 ,  C04B111/00 ,  C04B111/27

CPC classification number: C04B18/12 ,  C04B24/2641 ,  C04B24/2676 ,  C04B28/021 ,  C04B28/04 ,  C04B28/08 ,  E02D31/004 ,  E21F15/005 ,  C04B2111/00508 ,  C04B2111/00612 ,  C04B2111/00724 ,  C04B2111/27

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.

公开(公告)号：US20230097415A1

公开(公告)日：2023-03-30

申请号：US17800575

申请日：2021-04-25

Applicant: SHANXI UNIVERSITY

Inventor： Fangqin CHENG ,  Jianfang WU ,  Huiping SONG ,  Peihua ZHANG

IPC: C04B18/12 ,  E21F15/00 ,  E02D31/00 ,  C04B28/02 ,  C04B28/08 ,  C04B28/04 ,  C04B24/26

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.

公开(公告)号：US20220389817A1

公开(公告)日：2022-12-08

申请号：US17891920

申请日：2022-08-19

Applicant: Joshua Stephen Behling

Inventor： Joshua Stephen Behling

IPC: E21F15/00 ,  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.

公开(公告)号：US20220362599A1

公开(公告)日：2022-11-17

申请号：US17868037

申请日：2022-07-19

Applicant: SHANDONG UNIVERSITY OF SCIENCE AND TECHNOLOGY

Inventor： Xiangming HU ,  Weimin CHENG ,  Bingrui YAN ,  Yanyun ZHAO ,  Di XUE ,  Mingyue WU ,  Zhenglong HE ,  Guangxing BAI ,  Zonglei MOU

IPC: A62D1/00 ,  C09K21/06 ,  C09K21/02 ,  E21F15/00 ,  B01D11/02

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.

公开(公告)号：US20210355826A1

公开(公告)日：2021-11-18

申请号：US16613926

申请日：2018-09-20

Applicant: CHINA UNIVERSITY OF MINING AND TECHNOLOGY

Inventor： Nan Zhou ,  Meng Li ,  Hao Yan ,  Jixiong Zhang ,  Hengfeng Liu

IPC: E21C41/18 ,  E21F15/00

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.

公开(公告)号：US11143025B2

公开(公告)日：2021-10-12

申请号：US16608920

申请日：2019-04-01

Applicant: China University of Mining and Technology ,  Xuzhou Zhongkuang Backfilling & Mining Technology Co., Ltd.

Inventor： Jixiong Zhang ,  Qiang Zhang ,  Zhongyu Wu ,  Feng Ju ,  Jiaqi Wang ,  Yang Chen

IPC: E21F15/00 ,  E21C41/18 ,  E21C39/00 ,  E21F15/06

Abstract: A mine exploitation method based on stoping, separation and filling control is disclosed herein. The method includes deploying a gangue-less coal mining system; choosing a suitable coal and gangue separation method according to a separation requirement; choosing a suitable filling method according to mine geology, production conditions and rock stratum control requirement; reversely calculating a filling rate according to gangue discharge requirement and control indexes by utilizing theoretical calculation, simulation and experiment; determining a filling process and a separation process according to the filling rate; and feeding back and adjusting the filling process and separation process parameters by monitoring filling and control effect indexes.

公开(公告)号：US11111787B2

公开(公告)日：2021-09-07

申请号：US15752093

申请日：2016-08-12

Applicant: EVOLUTION RESOURCE GROUP PTY LTD

Inventor： Gregory Moore

IPC: E21F15/00 ,  E21F15/04 ,  E21C41/16 ,  E21F15/02 ,  E21C37/16 ,  E21C41/22

Abstract: A method and an apparatus for creating a void, low-density fill or combination of void and low-density fill for underground mining having at least one module of formwork to be positioned in an open slope of an underground mine prior to carrying out a backfilling operation.