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公开(公告)号：US11718792B2
公开(公告)日：2023-08-08
申请号：US18071653
申请日：2022-11-30
Applicant: CHINA UNIVERSITY OF MINING AND TECHNOLOGY
Inventor： Botao Qin , Quanlin Shi , Mingyue Hao , Shuang Zhao , Yizhen Xu , Xu Shao , Zujie Ma
Abstract: The present invention provides a fly ash-based environmentally-friendly hydrogel with a high water retention for preventing and controlling spontaneous combustion of coal in a mine and a preparation method thereof. The hydrogel includes the following raw materials in the following weight percentages: 10% to 30% of a gel-forming material A, 20% to 45% of a crosslinking material B, and water as a balance, where the gel-forming material A is prepared by physical blending of a biodegradable superabsorbent resin, anionic polyacrylamide, a sesbania gum, and fly ash in a weight ratio of (1-3):(0.5-1):(0.5-1):(95-98); and the crosslinking material B is prepared by subjecting zeolite, expandable graphite, and an aluminum citrate complex in a weight ratio of (60-78):(20-36):(2-4) to mixing, dispersing, adsorbing, and freeze-drying. The gel-forming material A is added to water and stirred at room temperature until homogeneous, and then the crosslinking material B is added and stirred until homogeneous to obtain the hydrogel. In the present disclosure, the environmentally-friendly hydrogel with the high water retention is prepared with wastes such as fly ash as a base material, and can be prepared simply with a low cost. In addition, the hydrogel has the advantages of degradability, strong water retention, and a controllable gelation time. The hydrogel can cover and wet a coal body for a long time, and prevent and control the spontaneous combustion of coal in a mine for a prolonged time.
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142.发明公开公开(公告)号：US20230224021A1
公开(公告)日：2023-07-13
申请号：US18113258
申请日：2023-02-23
Applicant: China University of Mining and Technology
Inventor： Bowen WANG , Yanjing SUN , Song LI , Xiao YUN , Ruirui CHEN , Yonggang XU
CPC classification number: H04B7/18504 , H04W4/90
Abstract: Disclosed is a relay selection method for unmanned aerial vehicles in post disaster emergency scenarios in underground space, comprising the following steps: collecting a maximum rate, a minimum rate and an average rate of data transmission assisted by a D2D user through an unmanned aerial vehicle (UAV) based on a prediction range of the D2D user for the UAV, and obtaining a first uncertain preference order of the D2D user for the UAV and a second uncertain preference order of the UAV for the D2D user; obtaining a preference strategy of the D2D user for the UAV based on the first uncertain preference order and the second uncertain preference order; and exchanging and matching the UAVs matched by any two D2D users based on the many-to-one bilateral matching model, so as to obtain a stable matching result of bilateral exchange.
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143.发明公开公开(公告)号：US20230169471A1
公开(公告)日：2023-06-01
申请号：US17919285
申请日：2021-02-23
Applicant: China University of Mining and Technology
Inventor： Hao LU , Zhencai ZHU , Yuxing PENG , Gongbo ZHOU , Gang SHEN , Yu TANG , Xiang LI , Wei WANG
IPC: G06Q10/20
CPC classification number: G06Q10/20
Abstract: An intelligent reliability evaluation and service life prediction method for a kilometer deep well hoist brake, the method including: the establishment of a digital twin model for a hoist brake, data acquisition and synchronization, and reliability evaluation and service life prediction, wherein the digital twin model for the hoist brake can accurately reflect actual physical characteristics of the hoist brake, the data acquisition and synchronization can realize real-time mapping between a physical entity of the hoist brake and the digital twin model therefor, and furthermore, on the basis of the digital twin model for the hoist brake, the reliability evaluation and service life prediction are realized. Digital twin technology is combined with a reliability analysis method, so that real-time updating of reliability evaluation and service life prediction of the hoist brake are realized.
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144.发明申请公开(公告)号：US20230051333A1
公开(公告)日：2023-02-16
申请号：US17492956
申请日：2021-10-04
Applicant: China University of Mining and Technology
Inventor： Bo Wang , Xiaozhao Li , Guanqun Zhou , Fuqing Li , Qinghong Dong , Ziwei Qian , Siyuan Hu , Hongyun Chen
Abstract: A directional drilling-exploring-monitoring integrated method for guaranteeing safety of an underwater shield tunnel includes: drilling a small-diameter borehole below a water area, and establishing an initial geological model; reaming the small-diameter borehole into a large-diameter borehole, placing a parallel electrical method (PEM) power cable and a monitoring optical fiber cable into the large-diameter borehole, acquiring zero field data, primary field data and secondary field data through carbon rod measurement electrodes before tunnel excavation, and processing the data with an existing inversion method to form an inversion image, thereby obtaining a refined geological model of a stratum; starting the tunnel excavation, and respectively acquiring a disturbance condition of rock and soil and a sedimentation and deformation condition of rock and soil around the tunnel during the excavation, thereby implementing safety excavation of the tunnel; and continuously monitoring the tunnel and the surrounding rock and soil in later use of the tunnel.
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145.发明申请公开(公告)号：US20230030574A1
公开(公告)日：2023-02-02
申请号：US17860063
申请日：2022-07-07
Inventor： Shuzhao CHEN , Quansheng LI , Zhiguo CAO , Liu HAN
Abstract: The disclosure discloses 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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Patent Agency Ranking
146.发明申请公开(公告)号：US20220381744A1
公开(公告)日：2022-12-01
申请号：US17745077
申请日：2022-05-16
Applicant: CHINA UNIVERSITY OF MINING AND TECHNOLOGY
Inventor： Yanan GAO , Donghao LAN , Yudong ZHANG , Yunlong WANG , Peng GUO , Feng GAO
IPC: G01N29/22
Abstract: Disclosed is a method for determining a whole macro-micro process of rock deformation and failure based on a four-parameter test, including following steps: firstly, obtaining acoustic emission data and deformation data of a sample in a compression test, and then calculating the deformation data according to a finite deformation theory to obtain a mean rotation angle θ at each stress level; using Grassberger-Procaccia (G-P) algorithm to calculate the acoustic emission data, and obtaining a fractal dimension of a temporal distribution DT of an acoustic emission signal and calculating a fractal dimension of a spatial distribution DS; obtaining a microscopic morphology of a fracture surface by scanning electron microscope (SEM) test after the compression test, and calculating a fractal dimension DA of the fracture surface; finally, obtaining a mathematical trend relationship between θ and DT, DS and DA according to a comprehensive analysis of DT, DS, DA and θ.
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公开(公告)号：US20220333486A1
公开(公告)日：2022-10-20
申请号：US17656423
申请日：2022-03-25
Applicant: China University of Mining and Technology , State Energy Investment Group Co. LTD , Jiangsu Vocational Institute of Architectural Technology
Inventor： Shuzhao CHEN , Quansheng LI , Liu HAN , Cangyan XIAO
Abstract: A method for constructing a dam inside a dump of an inner-dump strip mine includes: taking an upper surface connection line of a primary water-resisting layer as upper filling reference datum boundary of an artificial water-resisting layer; arranging a dam foundation pit and a trapezoidal abutment on a midline of the dam foundation pit; building and reinforcing a step-shaped retaining dam core wall on the artificial water-resisting layer; laying a foundation impervious layer, waterproof geotextile, and an earth blanket on one side, close to the primary aquifer, of the retaining dam core wall; strengthening advance of a dumping working face on one side, away from the primary aquifer, of the retaining dam core wall, and dumping overburden of a strip mine to form a support; filling a space between the earth blanket and the primary aquifer to form a blocker; and proceeding with construction and forming a continuous retaining dam.
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公开(公告)号：US11453832B2
公开(公告)日：2022-09-27
申请号：US17100840
申请日：2020-11-21
Applicant: SHANXI COKING COAL GROUP CO., LTD. , CHINA UNIVERSITY OF MINING AND TECHNOLOGY , JIANGSU HYDROCARBON CLEAN ENERGY TECHNOLOGY RESEARCH INSTITUTE CO., LTD.
Inventor： Jinfang Liu , Xiahui Gui , Yin Peng , Linsheng Gong , Tiezhu Zhao , Pengde Zhang , Zijian Ma
Abstract: An experimental method for coal desulfurization and deashing using permeation and solvating power of a supercritical fluid includes the following steps. The coal sample is ground and loaded into an extraction kettle with a cover. An inlet valve and an outlet valve of the extraction kettle are opened to circulate the supercritical CO2 fluid in the extraction kettle. The extraction kettle is sealed. By adjusting a temperature and a pressure in the extraction kettle, the supercritical CO2 fluid is kept at its critical point and permeates the coal sample to dissolve organic sulfur, inorganic sulfur and ash in the coal sample. The extraction kettle is depressurized, and the temperature in the extraction kettle is adjusted to gasify the supercritical CO2 fluid. The organic sulfur, the inorganic sulfur and part of the ash are separated from the supercritical CO2 fluid and precipitated at a bottom of the extraction kettle.
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公开(公告)号：US20220258176A1
公开(公告)日：2022-08-18
申请号：US17432486
申请日：2020-06-22
Applicant: CHINA UNIVERSITY OF MINING AND TECHNOLOGY
Inventor： Liang DONG , Yuemin ZHAO , Yongxin REN , Guanghui WANG , Wei DAI , Enhui ZHOU , Chenlong DUAN , Yanjiao LI
Abstract: An intelligent control method for a dry dense medium fluidized bed separator includes supplying air to fluidize a bed; estimating an initial bed density according to a washability curve of a raw coal; detecting a magnetic material content in the bed to obtain a real-time bed density, and adjusting the real-time bed density according to a result from an analysis on a deviation from the initial bed density; during separation, adjusting a medium addition amount and a scraper discharge speed to maintain a stability of a bed height; separating the raw coal in the dry dense medium fluidized bed separator to obtain a clean coal product; and detecting a product ash content of the clean coal product, comparing the product ash content with a target ash content, and if a difference between the product ash content and the target ash content exceeds an expectation, adjusting the initial bed density.
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150.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
Applicant: CHINA UNIVERSITY OF MINING AND TECHNOLOGY
Inventor： Jixiong Zhang , Yang Ju , A. J. S. (Sam) Spearing , Meng Li , Nan Zhou , Weiqing Zhang
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.
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