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公开(公告)号：US10301939B2
公开(公告)日：2019-05-28
申请号：US15770500
申请日：2016-11-18
Applicant: CHINA UNIVERSITY OF MINING AND TECHNOLOGY , Pingdingshan Tianan Coal Mining Co., LTD , China Pingmei Shenma Energy and Chemical Industry Group Co., LTD , Xuzhou ZhongAn Science & Technology Co., Ltd.
Inventor： Jixiong Zhang , Jianguo Zhang , Qiang Zhang , Qiang Sun , Wei Yin , WeiQing Zhang , Hao Yan
Abstract: Disclosed is a method for designing supporting parameters of a transition support for a mixed mining face of filling and fully-mechanized mining. The method includes: first, determining a total length of a mixed mining working face and a length of a filling section according to requirements of a coal mining production capacity of the mixed mining working face and a filling capacity of the filling section working face; then, establishing a mixed mining numerical model of filling and fully-mechanized mining by using three-dimensional distinct element software, and simulating and calculating a caving height of a roof of a transition section and a stress influence range of the transition section when a filling rate of a mined-out area of the filling section changes; based on a result of numerical simulation and calculation, performing curve fitting according to a correlation coefficient to obtain a functional relationship between the filling rate and the caving height and a functional relationship between the filling rate and the stress influence range of the transition section; and finally designing supporting parameters of a transition support in combination with actual engineering geological parameters. The method can provide a reference for supporting design of a support, and enables a smooth transition between a filling support and a fully-mechanized mining support for a mixed working face, thereby further enriching filling mining theories and expanding the application range of filling mining.
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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
Applicant: CHINA UNIVERSITY OF MINING AND TECHNOLOGY
Inventor： Nan Zhou , Meng Li , Hao Yan , Jixiong Zhang , Hengfeng Liu
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.
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Patent Agency Ranking
3.发明授权公开(公告)号：US12188339B2
公开(公告)日：2025-01-07
申请号：US18636666
申请日：2024-04-16
Applicant: CHINA UNIVERSITY OF MINING AND TECHNOLOGY
Inventor： Dan Ma , Qiang Li , Wentao Hou , Zhenhua Li , Yuanbo Xue , Xuefeng Gao , Kuirun Zhang , Weihao Huang , Zaixing Zu , Hao Wu , Hao Yan
IPC: E21B43/114 , E21B4/02 , E21B43/26
Abstract: Disclosed are a hydraulic fracturing and cutting cooperative device suitable for a hard rock and a use method thereof, belonging to the technical field of high-efficiency and rapid excavation of hard rock roadway (tunnel). The hydraulic fracturing and cutting cooperative device suitable for a hard rock provided by the disclosure includes a drill pipe, a pneumatic drilling system, a hydraulic fracturing system, a collaborative control system and a cutting head.
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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
Applicant: CHINA UNIVERSITY OF MINING AND TECHNOLOGY
Inventor： Nan Zhou , Jixiong Zhang , Hao Yan , Meng Li , Jiaqi Wang
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.
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公开(公告)号：US10385692B2
公开(公告)日：2019-08-20
申请号：US16088452
申请日：2016-12-01
Applicant: China University of Mining and Technology
Inventor： Jixiong Zhang , Qiang Zhang , Yanlong Chen , Kai Quan , Hao Yan
Abstract: An apparatus for pre-loading a mechanical constant-resistance single prop includes a rhombic stretchable bracket, a screw rod, a first cylindrical sleeve ring, and a second cylindrical sleeve ring. The screw rod is connected to two opposite apex corners of the rhombic stretchable bracket. A tail end of the screw rod is fixedly connected to one apex corner of the rhombic stretchable bracket. An end head of the screw rod passes through another apex corner of the rhombic stretchable bracket. The remaining two opposite apex corners of the rhombic stretchable bracket are respectively fixedly connected to edges of the first cylindrical sleeve ring and the second cylindrical sleeve ring through connecting rods. The screw rod is threadedly connected to the apex corner of the rhombic stretchable bracket through which the screw rod passes. A method for pre-loading a mechanical constant-resistance single prop is also provided.
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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
Applicant: CHINA UNIVERSITY OF MINING AND TECHNOLOGY
Inventor： Nan Zhou , Meng Li , Hao Yan , Jixiong Zhang , Hengfeng Liu
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.
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公开(公告)号：US09938083B2
公开(公告)日：2018-04-10
申请号：US14917817
申请日：2015-04-21
Applicant: CHINA UNIVERSITY OF MINING AND TECHNOLOGY
Inventor： Jixiong Zhang , Qiang Zhang , Rui Gao , Hao Yan , Meng Li
CPC classification number: B65G11/206 , B65G11/088 , B65G65/32 , B65G69/00 , B65G69/16 , B65G2201/045 , B65G2207/28 , B65G2814/0211
Abstract: A mechanical rocker-arm type vertical feeding cushioning device, consisting of two identical cushioning units and a box body (7). The two cushioning units are respectively arranged with a certain height difference on the inner side of the box body (7). Each cushioning unit consists of a cushioning mechanism and a fixing hinge mechanism. The cushioning mechanism is composed of a cushioning plate (1), a spring (5) and a balance weight (6). The fixing hinge mechanism is composed of a hinge plate (2), a right angle circular rod (3) and an elastic limiting device (4). The cushioning plate (1) is fixed to the hinge plate (2) via connection holes and using bolts. The hinge plate (2) is welded to the right angle circular rod (3). The elastic limiting device (4) consists of two elastic limiting plates and a hollow iron ring in a welded manner. The right angle circular rod (3) is connected to the elastic limiting device (4) in a sleeved manner via the hollow iron ring of the elastic limiting device (4). An upper end of the spring (5) is connected to the right angle circular rod (3), and the balance weight (6) is suspended at a lower end of the spring (5). Material is fed to the cushioning plates via a feeding pipe, and falls down after being cushioned twice by the cushioning plates (1). The cushioning device repeatedly cushions and recovers under the joint effect of the cushioning plates (1) and the cushioning balances (6).
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