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    System and method for monitoring bearing compression rate of filler in coal mine gob area
    1.
    发明授权
    System and method for monitoring bearing compression rate of filler in coal mine gob area 有权

    公开(公告)号：US11414991B2

    公开(公告)日：2022-08-16

    申请号：US17253126

    申请日：2019-06-24

    Applicant: CHINA UNIVERSITY OF MINING AND TECHNOLOGY

    Inventor： Jixiong Zhang ,  Yang Ju ,  A. J. S. (Sam) Spearing ,  Meng Li ,  Nan Zhou ,  Weiqing Zhang

    IPC: E21F15/00 ,  E21F17/18 ,  E21F15/02

    Abstract: Provided are a system and a method for monitoring bearing compression rate of a filler in a coal mine gob area. An ground information processing system, a vibration source control system, and a monitoring system are arranged on the ground according to a buried depth of the filler in the gob area. The vibration source control system generates vibration, and transmits a signal to the filler. The monitoring system on the ground receives different reflected waves according to different elasticities of the fillers under different compaction degrees. Final data is transmitted to the ground information processing system for data processing. The monitoring of the filler starts when the filler is filled in the gob area; the filler is gradually compacted. The filler is monitored until the thickness of the filler does not change. Finally, a bearing compression rate formula is utilized to calculate the bearing compression rate of the filler.

    UNDERGROUND COAL HYPERGRAVITY FIELD SEPARATION SYSTEM AND SEPARATION PROCESS
    3.
    发明申请
    UNDERGROUND COAL HYPERGRAVITY FIELD SEPARATION SYSTEM AND SEPARATION PROCESS 有权

    公开(公告)号：US20220314233A1

    公开(公告)日：2022-10-06

    申请号：US17657004

    申请日：2022-03-29

    Applicant: China University of Mining and Technology

    Inventor： Enhui Zhou ,  Yuemin Zhao ,  Liang Dong ,  Chenlong Duan ,  Yongxin Ren ,  Nan Zhou

    IPC: B03B9/00 ,  B03B5/34 ,  B03B5/44 ,  B03B7/00 ,  B03B13/00

    Abstract: The present disclosure relates to the field of mineral processing and separation, and in particular, to an underground coal hypergravity field separation system and a separation process. The separation system includes a grading hydrocyclone group, hypergravity field separators, feeding pumps, and conveying pumps. Coal collected underground is graded through a grading hydrocyclone first, then is fed into the hypergravity field separators for separation, and finally, is conveyed to a next link for dehydration through the conveying pumps. The separation system of the present disclosure has less supporting equipment, small floor area, and no complex pipeline, and is suitable for a downhole operation. In addition, the hypergravity field separators can provide a high-strength centrifugal acceleration, which can realize rapid separation of coal gangue particles in a radial direction and a tangential direction, and realize effective separation of fine coal gangue particles.

    INCLINED LAYERED SOLID-FILLING MINING METHOD IN ULTRATHICK COAL LAYER
    5.
    发明申请
    INCLINED LAYERED SOLID-FILLING MINING METHOD IN ULTRATHICK COAL LAYER 有权
    在ULTRATHICK煤层中采用层叠式固体填充采矿方法

    公开(公告)号：US20160102553A1

    公开(公告)日：2016-04-14

    申请号：US14891288

    申请日：2014-01-22

    Applicant: CHINA UNIVERSITY OF MINING AND TECHNOLOGY

    Inventor： Jixiong Zhang ,  Nan Zhou ,  Qiang Zhang ,  Jiwei Guo ,  Xiaoming Shen ,  Feng Ju ,  Haiqiang Jiang

    IPC: E21F15/02 ,  E21C41/16

    CPC classification number: E21F15/02 ,  E21C41/04 ,  E21C41/16 ,  E21D23/0481

    Abstract: An inclined layered solid-filling mining method in an ultrathick coal layer is applicable to exploitation in a “three-unders” ultrathick coal layer. In this method, the number of inclined layers is determined based on a principle of layered thickness from 2.5 m to 4.5 m, and a layered-exploitation downward-filling exploitation order is adopted. Tunnels and equipment are arranged according to a conventional solid-filling mining method. A cyclic order of mining, layout of metal meshes (14) and bamboo fences (24), and filling is adopted, so as to accomplish filling and exploitation of a first mining face and a first layer (21). Meanwhile, 4 months after the working face of this layer is finished, at a corresponding position in a second layer (22), under the cover of an artificial ceiling formed by the first layer (21), exploitation is performed by using the same filling mining method; such a cycle is repeated, and exploitation in a current layer is performed under the cover of an artificial ceiling fabricated by an upper layer, until the entire ultrathick coal layer is finished. When this method is adopted to exploit “three-unders” ultrathick coal layer resources, strata movement and earth surface subsidence may be effectively controlled; the method has a high extraction rate, high production efficiency, and low cost.

    Abstract translation: 超薄煤层倾斜层状固体填充开采方法适用于“三低”超薄煤层的开采。 在该方法中，倾斜层的数量根据层叠厚度为2.5μm〜4.5μm的原理确定，采用层叠剥离向下填充开采顺序。 隧道和设备根据常规的固体填充开采方法进行排列。 采用循环采矿顺序，金属网格（14）和竹栅栏布置（24），填充，完成第一采矿面和第一层的灌装开采（21）。 同时，在该层的工作面完成4个月后，在第二层（22）的相应位置，在由第一层（21）形成的人造天花板的盖下，利用相同的填充物 采矿方法; 重复这样一个循环，并且在由上层制造的人造天花板的盖子下进行当前层的开采，直到整个超薄煤层完成。 采用这种方法开发“三低”超薄煤层资源时，可以有效控制地层运动和地表沉降; 该方法提取率高，生产效率高，成本低。

    Method for radially mining open-pit end slope pressed coal
    6.
    发明授权
    Method for radially mining open-pit end slope pressed coal 有权

    公开(公告)号：US11377952B2

    公开(公告)日：2022-07-05

    申请号：US16973771

    申请日：2019-10-08

    Applicant: CHINA UNIVERSITY OF MINING AND TECHNOLOGY

    Inventor： Nan Zhou ,  Jixiong Zhang ,  Hao Yan ,  Meng Li ,  Jiaqi Wang

    IPC: E21C47/02 ,  E21F1/04 ,  E21C41/28

    Abstract: Provided is a method for radially mining open-pit end slope pressed coal, including: L-shaped or U-shaped main tunnel arrangements, and radially mining; branch tunnels are formed by excavating tunnels in directions perpendicular to or obliquely crossing the main tunnel from the L-shaped or U-shaped main tunnel; In the mining method, a coal mining system and a transportation system both adopt a remote control mode, a tunneling machine excavates a tunnel to product coal; a rubber belt conveyor conveys coal; the main tunnel adopts an exhaust ventilation mode, the branch tunnels adopt a blowing ventilation mode; the lengths of the branch tunnels do not exceed a farthest control distance of a remote control system; the length of each main tunnel needs to ensure that all the end slope pressed coal is mined under the premise that the branch tunnels do not exceed the farthest control distance of the remote control system.

    SOLID FILLING COAL MINING FEEDING AND CONVEYING MONITORING SYSTEM
    7.
    发明申请
    SOLID FILLING COAL MINING FEEDING AND CONVEYING MONITORING SYSTEM 有权
    固体填充煤炭采矿和输送监测系统

    公开(公告)号：US20160311625A1

    公开(公告)日：2016-10-27

    申请号：US15101877

    申请日：2015-06-12

    Applicant: CHINA UNIVERSITY OF MINING AND TECHNOLOGY

    Inventor： Jixiong Zhang ,  Nan Zhou ,  Wei Yin ,  Meng Li

    IPC: B65G43/02 ,  E21F13/04

    CPC classification number: E21F17/18 ,  B65G43/00 ,  B65G43/02 ,  B65G43/08 ,  B65G2201/045 ,  B65G2203/0258 ,  B65G2203/041 ,  E21F13/04 ,  E21F15/06 ,  H04N7/181

    Abstract: A solid-filling coal mining feeding and conveying monitoring system, suitable for monitoring of a vertical feeding and conveying system in underground mine solid-filling mining. The monitoring system mainly consists of an industrial control computer, a PLC control box, an operating platform, a liquid crystal display, a color four-picture divider, two video optical receivers and loudspeakers, four cameras, uphole electronic belt scales, downhole electronic belt scales, a radar level meter, a coal level sensor, a vibration sensor, and various matching junction boxes and cables, the components being installed in positions such as a material field, a control room, upper and lower openings of a storage silo, and a gangue transportation lane. The system implements four main functions of a solid-filling material transportation and feeding process, the four main functions being status monitoring, a full silo alarm, centralized control, and recording and querying. The monitoring content of the system is comprehensive; operation of the system is simple; and the system is safe and reliable.

    Abstract translation: 一种固体填充采煤和输送监测系统，适用于地下矿井采矿垂直进料和输送系统的监测。 监控系统主要由工业控制计算机，PLC控制箱，操作平台，液晶显示器，彩色四画面分割器，两个视频光接收器和扬声器，四个摄像头，井下电子皮带秤，井下电子皮带 秤，雷达液位计，煤层传感器，振动传感器和各种匹配的接线盒和电缆，这些部件安装在诸如材料场，控制室，存储筒仓的上部和下部开口的位置，以及 g石运输车道。 该系统实现了固体填充物料运输和进料过程的四个主要功能，四个主要功能是状态监测，全筒仓报警，集中控制和记录和查询。 系统监控内容全面; 系统操作简单; 系统安全可靠。

    Method for recovering room-type coal pillars by cemented filling of reserved roadways
    8.
    发明授权
    Method for recovering room-type coal pillars by cemented filling of reserved roadways 有权

    公开(公告)号：US11339658B2

    公开(公告)日：2022-05-24

    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: E21C41/16 ,  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.

    Internally injected replacement support room-type coal pillar recovery method
    9.
    发明授权
    Internally injected replacement support room-type coal pillar recovery method 有权

    公开(公告)号：US11313226B2

    公开(公告)日：2022-04-26

    申请号：US16603832

    申请日：2019-02-22

    Applicant: CHINA UNIVERSITY OF MINING AND TECHNOLOGY

    Inventor： Nan Zhou ,  Jiaqi Wang ,  Jixiong Zhang ,  Kai Sun ,  Meng Li

    IPC: E21F15/00 ,  E21C41/18 ,  E21D15/00 ,  E21D15/02 ,  G06Q50/02

    Abstract: An internally injected replacement support room-type coal pillar recovery method is provided. During the recovery, the room-type coal pillars with an aspect ratio greater than 0.6 are divided into two parts: reserved coal pillars and pre-mined coal pillars. After the mining of the pre-mined coal pillars, a cemented filling material is injected into a goaf surrounded by the reserved coal pillars, and is stabilized to replace the coal pillars for support, and the reserved coal pillars are recovered. A mechanical model of the reserved coal pillars in a support overburden stage is established based on the Winkler beam theory, to obtain displacement and stress conditions of a roof of the reserved coal pillar in a support stage. A theoretical reserve-width of the reserved coal pillars is obtained according to a first strength theory of the roof and a criterion of ultimate strength of the reserved coal pillars.

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