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31.发明授权公开(公告)号：US11673747B2
公开(公告)日：2023-06-13
申请号：US17860063
申请日：2022-07-07
Inventor： Shuzhao Chen , Quansheng Li , Zhiguo Cao , Liu Han
Abstract: Provided herein is a method for constructing a pumping-injection well of a groundwater reservoir in a dump of an open-pit mine. The pumping-injection well includes a bottom pipe, intermediate pipes, and a top pipe in sequence from bottom to top connected from bottom to top. The method includes: arranging a rubble barrier around the pumping-injection well, and installing the bottom pipe of the pumping-injection well at a designed position of the pumping-injection well as a center of circle; continuing to install an intermediate pipe on the bottom pipe, and pile up a rubble pile; continuing to stack multiple intermediate pipes, and starting the construction of the groundwater reservoir; discarding discarded materials from the open-pit mine to form a dump; continuing to stack intermediate pipes to build an inverted trapezoidal surface sump around the pumping-injection well; and installing the top pipe and a well cover to form a complete pumping-injection well.
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32.发明公开公开(公告)号：US20230175398A1
公开(公告)日：2023-06-08
申请号：US17922066
申请日：2021-04-30
Inventor： Jiong Wang , Wenfei Li , Zimin Ma , Guangyuan Yu , Manchao He , Gonghua Chen , Guoqiang Xiao
Abstract: The present disclosure relates to the technical field of mine ventilation, and in particular, to a three-dimensional ventilation method and system for mining by 110 construction method in coal and gas outburst mines. The three-dimensional ventilation method comprises: constructing a first process roadway and/or a second process roadway before stopping the working face; forming a first roof-cutting and roadway retaining section by a part of the working face track gate located in the goaf, and/or forming a second roof-cutting and roadway retaining section by a part of the working face transport gate located in the goaf during the stopping process of the working face, so that the air inlet of the first roof-cutting and roadway retaining section enters the gas drainage air return roadway through the first process roadway to form return air, and/or the inlet air of the second roof-cutting and roadway retaining section enters the gas drainage air inlet roadway through the second process roadway to form return air, the three-dimensional ventilation system is constructed by using the gas drainage air inlet roadway and the gas drainage air return roadway, during the conversion from the 121 construction method to the 110 construction method, a complete ventilation system can be formed in the roadway retaining section, real-time monitoring of the roadway retaining section can be carried while eliminating harmful gas accumulation in the retaining section.
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公开(公告)号：US20230118041A1
公开(公告)日：2023-04-20
申请号：US17802188
申请日：2021-06-15
Applicant: CHINA UNIVERSITY OF MINING AND TECHNOLOGY
Inventor： Hao LU , Hui JIANG , Zhencai ZHU , Guohua CAO , Yuxing PENG , Gongbo ZHOU , Gang SHEN , Fan JIANG , Yu TANG , Xiang LI , Wei WANG
Abstract: The present disclosure provides a system for monitoring a scraper chain based on a measurement on transmittance of a torsion spring and a method thereof. The system includes a sprocket-wheel torsion detection device, a fixing device, a wireless receiver, an A/D converter and an industrial computer. In the method, the relative torsion of the two sprocket wheels is converted into the density change of the torsion spring, the light transmission area is converted into the current value by the laser sensing panel, a varying range of the torsion spring is calculated by the industrial computer through the preset threshold and its own program to monitor the operating conditions of the chain. The method has a novel concept, a stable and reliable system, and a high promotion value.
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公开(公告)号：US20230030467A1
公开(公告)日：2023-02-02
申请号：US17873970
申请日：2022-07-26
Applicant: CHINA UNIVERSITY OF MINING AND TECHNOLOGY
Inventor： Shuzhao CHEN , Liu HAN , Cangyan XIAO , Meng YANG
IPC: E21C41/26
Abstract: A method for slope geological disaster treatment and mineral resource recovery includes the following steps: S1: dividing a mountain top into a plurality of treatment sections and treatment segments; S2, selecting an easy-to-slide area at the upper portion of a first treatment segment and blasting an easy-to-slide body to make the easy-to-slide body roll down to a bottom of the slope; S3, forming a regular initial slope bench; S4, mining coal at the coal seam in a grouped mining adit manner, and laying grouting pipelines in the primary mining adits; S5, forming closed mining adits; S6, excavating secondary mining adits at intervals of the primary mining adits in sequence; S7, continuing mining in an adjacent second treatment segment in the same manner; and S8, continuing mining the first treatment segment of the second treatment section in the same manner.
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公开(公告)号：US11484913B2
公开(公告)日：2022-11-01
申请号：US17598890
申请日：2020-02-29
Applicant: CHINA UNIVERSITY OF MINING AND TECHNOLOGY
Inventor： Yuemin Zhao , Jesse Zhu , Chenyang Zhou , Zhijie Fu , Zhenfu Luo , Chenlong Duan
Abstract: Provided is a gas-solid fluidized bed dry beneficiation process using a beneficiation density gradient, including: in a dry beneficiation system of a gas-solid fluidized bed, selecting coarse particles and fine particles; placing the coarse particles at a bottom of the dry beneficiation system, and placing the fine particles above the coarse particles, wherein the coarse particles and the fine particles are separated under an initial condition; under an effect of a gas flow, the coarse particles and the fine particles being fluidized to form a high-density beneficiation region and a low-density beneficiation region, respectively, and the coarse particles and the fine particles being mixed at a contact interface to form an intermediate-density beneficiation region; and feeding minerals to be beneficiated from an upper portion of the dry beneficiation system to pass through the low-density beneficiation region, the intermediate-density beneficiation region, and the high-density beneficiation region in sequence.
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Patent Agency Ranking
公开(公告)号：US11440740B2
公开(公告)日：2022-09-13
申请号：US17418853
申请日：2019-11-26
Applicant: China University of Mining and Technology
Inventor： Dagang Wang , Ruixin Wang , Zhencai Zhu , Huilong Zhu , Gang Shen , Xiang Li , Yu Tang
Abstract: A frictional force monitoring system for middle troughs of a scraper conveyor, comprising a scraper conveyor system and a sensing detection system. The scraper conveyor system consists of a machine body, middle troughs, thrust lugs, scrapers, a double chain, a sprocket, a speed reducer, an electric motor and a frequency converter. The sensing monitoring system consists of force receiving modules, a three-dimensional force sensor, and a pre-embedded temperature sensor. The frictional force monitoring system is able to monitor impact loads, frictional forces, friction coefficients, temperature, etc. between an annular chain, coal bulk, and middle troughs of the scraper conveyor under complex and severe operating conditions, and to provide the technical means for the design, safety early-warning and health evaluation of the scraper conveyor, and can provide a data basis for studying friction wear and fatigue breaking mechanism of middle troughs of a scraper machine.
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37.发明授权公开(公告)号：US11434444B2
公开(公告)日：2022-09-06
申请号：US16972396
申请日：2019-06-11
Applicant: China University Of Mining And Technology
Inventor： Bo Zhang , Yuemin Zhao , Yadong Zhang , Guanghui Yan , Zhenfu Luo , Chenlong Duan , Liang Dong , Enhui Zhou
Abstract: The present invention is directed towards a process for upgrading lignite comprising: prior to production pre-assess the calorific value of the coal, by selecting a relational expression between a calorific value of lignite and a degree of metamorphism, a moisture content and an ash content thereof based on a ratio of the ash content to the moisture content, pre-assess the calorific value of the coal; combining a relational expression between a production cost and the ash content and moisture content to make a cost budget; determining degrees of deashing and drying; selecting and implementing a lignite ash reduction pretreatment process; and implementing dry sorting first and then drying. The upgrading process has high sorting efficiency, high drying efficiency and low production cost, and meets the requirement for the surface moisture of the raw coal in the dry sorting operation.
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公开(公告)号：US20220275726A1
公开(公告)日：2022-09-01
申请号：US17604113
申请日：2020-04-15
Inventor： Jiong WANG , Manchao HE , Guangyuan YU , Han SUN
Abstract: The present disclosure relates to a technical field of coal mining, particularly to a method of no-pillar mining with gob-entry retaining adapted for fully-mechanized top coal caving in a thick coal seam, which comprises the following steps: reinforcing support on a roof and two sides of a roadway; performing roof slitting blasting to form a pre-splitting slit; erecting a temporary support device and a gangue retaining device in the roadway along the retained entry; performing no caving within a range of a preset distance at an end of the working face near the retained entry side; and removing the temporary support device in the roadway after entry forming stabilizes, and closing the goaf to complete entry retaining. The roof slitting blasting is more beneficial to collapse of strata in the goaf, so that the strata in the slit can better fill stoping space after collapse, and the roof of the retained entry forms a short arm beam structure laterally, which avoids forming a long suspended roof in the goaf, and improves the stress of surrounding rock of gob-side entry retaining; coal caving is not performed in a certain range at the end of the working face of the retained entry side, which further ensures the filling effect of the goaf on the retained entry side, effectively limits the rotary sinking of blocks of the main roof, and greatly reduces effect on the stability of the retained entry.
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公开(公告)号：US11371522B2
公开(公告)日：2022-06-28
申请号：US17425334
申请日：2020-07-02
Inventor： Fangwei Xie , Shupeng Fang , Zuzhi Tian , Gang Shen , Zhencai Zhu , Haifang Zhang , Honglei Li , Chunjie Xu , Wancai Zhou
IPC: F04D29/22 , F04D29/68 , F04D7/04 , F04D13/06 , F04D29/62 , F04D29/20 , F04D29/043 , F04D29/12 , F04D29/58 , F04D29/06 , F04D13/08 , F04D29/28 , F04D29/10 , F04D13/02 , F04D29/66 , F04D29/24
Abstract: Disclosed is a permanent magnet direct-drive slurry pump based on gas film drag reduction, which includes a permanent magnet motor, a main shaft, an impeller, and a valve block. The permanent magnet motor includes a housing, a stator core, stator windings, a rotor core, and a permanent magnet. The rotor core and the impeller share the main shaft, and an airflow channel is provided inside the main shaft. The impeller includes a front cover plate, a back cover plate, and blades. The blades are modularly manufactured, and blade gas jet holes and hemispherical pits are provided on the pressure surface. The airflow channel in the main shaft is communicated with the blade gas-jet holes. The valve block is disposed at the tail end of the main shaft so as to control gas exhaust and prevent liquid from entering the shaft. The present invention has such advantages as a small size, high efficiency, and strong wear resistance.
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40.发明授权公开(公告)号：US11371320B2
公开(公告)日：2022-06-28
申请号：US17296224
申请日：2020-04-24
Inventor： Yang Ju , Jinxin Song , Peng Liu
Abstract: An experimental method and system for simulating the evolution of reservoir fracture stress field, the experimental method comprises the following steps: (S1) preparing horizontal well fracturing model (100); (S2) applying boundary loads and constraints to the horizontal well fracturing model (100); (S3) injecting fracturing fluid or fracturing gas into a fracturing wellbore (130) of the horizontal well fracturing model (100) after loading for fracturing; in a fracturing stage, a photoelastic fringe image of the horizontal well fracturing model (100) is obtained by an optical phase shift method; the fracturing stage comprises an initial state before fracturing fluid or fracturing gas is injected and an end state after fracturing is completed. The experimental method and system can effectively simulate the whole process of horizontal well fracturing, and accurately obtain the variation law of reservoir stress field and its influence on crack propagation during horizontal well fracturing.
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