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公开(公告)号：US20210355826A1
公开(公告)日：2021-11-18
申请号：US16613926
申请日：2018-09-20
发明人： Nan Zhou , Meng Li , Hao Yan , Jixiong Zhang , Hengfeng Liu
摘要： 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.
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公开(公告)号：US20200241169A1
公开(公告)日：2020-07-30
申请号：US16756819
申请日：2019-04-18
发明人： Meng Li , Jixiong Zhang , A.J.S. (Sam) Spearing , Zhongya Wu , Nan Zhou , Feng Gao
摘要： The present invention discloses a method for determining internal stress of a solid filling material, comprising the following steps: step 1) acquiring stress data of the solid filling material, and fitting the stress-strain relationship of the solid filling material; step 2) calculating surface subsidence in the solid filling area on the basis of an equivalent mining height theory with a probability integration method; step 3) calculating the expansion height of fractured zones in the area under a solid-backfill coal mining condition; step 4) calculating the strain in the solid filling material at a distance L from the rear of the stope by combing with step 2) and step 3); step 5) calculating internal stress in the solid filling material at distance L from the rear of the working face. The present invention attains the following beneficial effects: the present invention provides a method for calculating the stress in filling mass for solid-backfill coal mining. The method is simple and practical, and is of great significance for reckoning the distribution of the stress in the surrounding rock for solid backfill mining, guiding the backfill mining support design, and enriching the backfill mining pressure theory system.
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公开(公告)号：US10352167B2
公开(公告)日：2019-07-16
申请号：US16084971
申请日：2016-12-01
发明人： Jixiong Zhang , Nan Zhou , Wenyue Qi , Qiang Zhang , Meng Li
摘要： The present invention discloses a process method for withdrawing and recovering a mechanical constant-resistance single prop, specific steps involving: detecting a working resistance and a degree of deformation of a mechanical constant-resistance single prop, releasing lug clamp bolts of a recoverable base, knocking a lower portion of a cylinder body of the mechanical constant-resistance single prop to disengage the mechanical constant-resistance single prop from the recoverable base, and dismantling the mechanical constant-resistance single prop. Parts are classified and recovered based on degree of deformation thereof. By means of the foregoing method, a process of withdrawing and recovering a mechanical constant-resistance single prop is standardized, simple and fast disengagement of the mechanical constant-resistance single prop is achieved, and parts that can still be used can be sufficiently recovered and reused, thereby achieving the objectives of saving energy and reducing costs.
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4.发明授权公开(公告)号：US11414991B2
公开(公告)日：2022-08-16
申请号：US17253126
申请日：2019-06-24
发明人： Jixiong Zhang , Yang Ju , A. J. S. (Sam) Spearing , Meng Li , Nan Zhou , Weiqing Zhang
摘要： 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.
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公开(公告)号：US11021954B2
公开(公告)日：2021-06-01
申请号：US16763426
申请日：2019-02-22
发明人： Nan Zhou , Hengfeng Liu , Meng Li , Zhongya Wu , Jixiong Zhang
摘要： A method of recovering a room-and-pillar coal pillar by using external replacement supports. In the recovery of a room-and-pillar coal pillar, a cement material wall is formed by performing pouring around a coal pillar having a width to height ratio of less than 0.6, by means of a single-pillar sack arrangement technique, such that a coal pillar resource may be mined while a wall made from a cement filling material supports an overlying stratum. After mining is complete, a coal pillar goaf region is filled with the cement filling material, and after the cement filling material solidifies and is stable, the single pillar can be recovered.
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公开(公告)号：US11377952B2
公开(公告)日：2022-07-05
申请号：US16973771
申请日：2019-10-08
发明人： Nan Zhou , Jixiong Zhang , Hao Yan , Meng Li , Jiaqi Wang
摘要： 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.
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公开(公告)号：US10895154B2
公开(公告)日：2021-01-19
申请号：US16088437
申请日：2017-11-02
发明人： Qiang Zhang , Jixiong Zhang , Zhongya Wu , Wenyue Qi , Hong Yan , Meng Li
摘要： Provided is a base mechanism of a single prop capable of being unloaded at reduced pressure, including a base bottom plate and two wedge-shaped support blocks, where one of the wedge-shaped support blocks serves as a fixed wedge-shaped support block and is welded onto the base bottom plate, and the other of the wedge-shaped support blocks serves as a movable wedge-shaped support block and is connected to the fixed wedge-shaped support block by using a screw rod and a nut. The present invention can effectively unload the single prop at reduced pressure or remove the single prop in a contracted manner, is of a simple structure, is convenient to operate, has a good use effect, overcomes the technical problem that it is difficult to unload a single prop at reduced pressure in this technical feature, and is widely applicable in this technical field.
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公开(公告)号：US20160311625A1
公开(公告)日：2016-10-27
申请号：US15101877
申请日：2015-06-12
发明人： Jixiong Zhang , Nan Zhou , Wei Yin , Meng Li
CPC分类号： E21F17/18 , B65G43/00 , B65G43/02 , B65G43/08 , B65G2201/045 , B65G2203/0258 , B65G2203/041 , E21F13/04 , E21F15/06 , H04N7/181
摘要： 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.
摘要翻译： 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。
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公开(公告)号：US11339658B2
公开(公告)日：2022-05-24
申请号：US16613926
申请日：2018-09-20
发明人： Nan Zhou , Meng Li , Hao Yan , Jixiong Zhang , Hengfeng Liu
摘要： 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.
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公开(公告)号：US11313226B2
公开(公告)日：2022-04-26
申请号：US16603832
申请日：2019-02-22
发明人： Nan Zhou , Jiaqi Wang , Jixiong Zhang , Kai Sun , Meng Li
摘要： 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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