Patents Assigned to China University of Mining and Technology
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Publication number: 20200003667Abstract: A method for determining a physical similarity simulation material of a solid backfill body is provided. A compaction test is run on a gangue backfill body in a lab, to obtain a ?-? curve regarding the gangue backfill body in the compaction process. Backfill blocks are made by using a thin wood board, sponge, and a paper sheet in different proportions, and then an unconfined compression test is separately run on the backfill blocks used for physical similarity simulation, to obtain ?i-?i curves regarding the backfill blocks in the compression process. A sum of squared errors ?(?i??0)2 is introduced to separately calculate a sum of squared errors of the backfill block and that of the gangue backfill body, and accordingly an error between ?-? curves regarding the test block and the gangue backfill body is determined. Finally, a backfill block for which the sum of squared errors is less than 0.5 is determined as a physical similarity simulation material of the gangue backfill body.Type: ApplicationFiled: November 16, 2017Publication date: January 2, 2020Applicants: China University of Mining and Technology, XUZHOU ZHONAN SCIENCE&TECHNOLOGY CO., LTDInventors: Jixiong ZHANG, Xiaole HAN, Qiang ZHANG, Lixin LAN, Yadong CHEN, Yang TAI
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Patent number: 10487656Abstract: A method for constructing networked preferential gas migration pathways and diverting and extracting gas. The method proposes that a fracture generation hole, a fracture guidance and development hole, a lateral rupture hole, and a fracture connection hole are respectively constructed in a roof in roadways on two sides of a working face in advance of an advance stress change area. Artificial guided fractures are actively constructed and formed inside the hard roof. Under a mining-induced stress effect, the artificial guided fractures and mining-induced fractures intersect with and are connected to each other to form networked preferential gas migration pathways. Meanwhile, boreholes for artificial guided fractures accelerate roof fracturing to form a rupture bed separation fracture area in a roof. Gas flows and migrates in a timely and efficient manner along networked fracture pathways and concentrates in the rupture bed separation fracture area in the roof.Type: GrantFiled: December 1, 2017Date of Patent: November 26, 2019Assignee: China University of Mining and TechnologyInventors: Baiquan Lin, Tong Liu, Ting Liu, Wei Yang, He Li, Rui Wang, Zheng Wang
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Patent number: 10480139Abstract: A stampede preventing method for a pedestrian passage in a confined space of a subway. Pedestrian flow sensors are arranged on a pedestrian passage, where the pedestrian flow sensors are connected to a control unit by means of data transmission lines, the control unit is connected to stampede preventing devices and top ends of the stampede preventing devices are connected to movable walls and handrails; the pedestrian flow sensors transmit a pedestrian number and crowdedness that are monitored in real time; the control unit analyzes signals of the pedestrian flow sensors according to a system program, and determines whether crescent buffer space areas need to be opened in the pedestrian passage; the control unit issues different expansion commands according to different degrees of crowdedness; and the stampede preventing devices control the movable walls and the handrails to start contracting to form the crescent buffer space areas.Type: GrantFiled: November 7, 2017Date of Patent: November 19, 2019Assignees: China University of Mining and Technology, JIANGSU XINCHUANG SAFETY TECHNOLOGY RESEARCH INSTITUTE CO., LTD.Inventors: Fubao Zhou, Chun Liu, Zhongyi Man
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Publication number: 20190344107Abstract: The present invention discloses a gas-powder separation three-phase jet flow fire monitor system, including a gas-powder separation three-phase fire monitor head, a filter, a nitrogen pressurization apparatus and a dry powder tank. The dry powder tank is connected to a powder feeding pipe of the gas-powder separation three-phase fire monitor head through a pipeline. A nitrogen outlet pipe of the gas-powder separation three-phase fire monitor head is connected with one end of the nitrogen pressurization apparatus through the filter. The other end of the nitrogen pressurization apparatus is connected with the dry powder tank. The present invention is simple in structure and convenient to use. A cyclone separation apparatus of a dry powder pipeline of the fire monitor may separate nitrogen from conveyed ultrafine dry powder to enable the ultrafine dry powder to be fully mixed with a water-based fire extinguishing agent, thereby reducing an atomization degree of jet flow and enlarging a range of the fire monitor.Type: ApplicationFiled: August 25, 2017Publication date: November 14, 2019Applicant: China University of Mining and TechnologyInventors: Beibei LI, Xiumei LIU, Jingjing WANG, Ruirui LI, Yaoda YUE, Jie HE, Wei LI
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Publication number: 20190346180Abstract: A method for extracting thermal energy in an underground high temperature area of a coalfield fire area, including: determining a thermal extraction target area by a natural potential method and a ground detecting borehole; using an injection borehole to send a gaseous thermal medium to an underground high temperature area of the thermal extraction target area; after the thermal exchange between the gaseous thermal medium and a high temperature coal rock mass, the gaseous thermal medium is extracted through an extraction borehole; continuously monitoring a natural potential of the thermal extraction target area; arranging a casing-type borehole thermal exchanger in a potential anomaly region to complete the thermal exchange between the high temperature coal rocks and a liquid thermal medium; stopping the thermal extraction operations when the temperatures of the extracted gaseous thermal medium and the liquid thermal medium reach 70° C. or below.Type: ApplicationFiled: May 4, 2017Publication date: November 14, 2019Applicant: China University of Mining and TechnologyInventors: Xiaoxing ZHONG, Yan TANG, Xinhao ZHANG, Guangyu LI, Deming WANG
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Patent number: 10472963Abstract: A method for stepwise construction of a preferential gas migration pathway at a stope in a coal seam. First, a gas migration pathway is preliminarily formed at a stope depending on a mining effect of mining in a first mined seam. construction and stabilization method of gob-side entry retaining in deep strata, and a method of manual-guided pre-fracturing boreholes are then used to perform active construction respectively in external space and the outside of coal-rock mass to form preferential gas migration pathways. Eventually, under the effect of mining-induced stress, a system of preferential gas migration pathways connected to each other at the stope is further formed.Type: GrantFiled: December 1, 2017Date of Patent: November 12, 2019Assignee: China University of Mining and TechnologyInventors: Baiquan Lin, Tong Liu, Ting Liu, Wei Yang, He Li, Zhanbo Huang, Rui Wang, Yihan Wang
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Publication number: 20190337773Abstract: An apparatus and a method for measuring a rotational angle of a sinking platform. The apparatus includes a sinking platform being a subject to be measured, suspension ropes and guide ropes connected to the sinking platform, a carriage assembled on the guide ropes, a gyroscope and a gyroscope signal radio transmitter mounted at an upper end of the carriage, and a tilt angle sensor and a radio signal reception processor mounted on the sinking platform. During running of the carriage, the gyroscope keeps measuring a pose of the carriage, and a measured signal is transmitted to the radio transmitter in a wired manner. The radio transmitter transmits a pose signal of the carriage during running to the radio signal reception processor in a wireless manner. A turning angle of the sinking platform in the y direction is accurately obtained by subtracting a pose of the carriage being located at the top of the guide ropes from a pose of the carriage being located at the bottom of the guide ropes.Type: ApplicationFiled: November 13, 2017Publication date: November 7, 2019Applicants: China University of Mining and Technology, XUZHOU COAL MINE SAFETY EQUIPMENT MANUFACTURE CO.. LTDInventors: Guohua CAO, Yandong WANG, Zhencai ZHU, Weihong PENG, Gang SHEN, Shanzeng LIU, Chunli HUA, Zhenhua JIANG, Xuan DONG
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Publication number: 20190337762Abstract: A slope-adaptive inclined special elevator includes a bumper, an elevator car system, a slope guide rail system, a counter-weight system, a traction machine, a governing rope governor, and a traction rope guiding wheel. The two ends of the traction rope are connected to the elevator car system and the counter-weight system respectively, and the traction rope is towed and lifted under the driving action of the traction machine and the guiding action of the traction rope guiding wheel; over-speed protection is realized by means of the governing rope governor and a safety gear linkage and the bumper; to adapt to slope variations, the car body is leveled automatically by an automatic leveling assembly, the traction rope is guided forcibly via traction rope lifting devices and traction rope pressing devices, and the governing rope is guided forcibly via governing rope lifting devices and governing rope pressing devices.Type: ApplicationFiled: December 22, 2015Publication date: November 7, 2019Applicants: Dongnan Elevator Co, Ltd, China University of Mining and TechnologyInventors: Guohua CAO, Zhencai ZHU, Lei WEI, Jiancong QIN, Xiaoguang BO, Weihong PENG, Yiping MA, Lei WANG
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Publication number: 20190316454Abstract: A stress-transfer method in tunnel with high ground pressure based on fracturing ring. According to the stress source of the tunnel, fracturing by drilling holes to form artificial weaken zones in surrounding rocks, that's named fracturing ring. The fracturing ring is the weaken zone with some width, whose inner boundary is the protective circle. The fracturing ring with small width is called the cutting and interruption circle and the cutting or interruption arc. The radius of the protective circle is determined by setting a certain width of safety coal pillar barriers at the edge of a support body. The radius of the fracturing ring is determined by the surrounding rock structure and the stress conditions as well as the construction technology. Usually, the higher the stress, the wider the radius of the fracturing ring. The cutting and interruption circle or arc could cut off all of the targeted rock which transmits the stress.Type: ApplicationFiled: September 30, 2017Publication date: October 17, 2019Applicants: China University of Mining and Technology, XUZHOU USURE MINING TECHNOLOGY CO.,LTDInventors: Bingxiang HUANG, Jiangwei LIU, Xinglong ZHAO, Shuliang CHEN
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Publication number: 20190293359Abstract: Provided is an energy storage system coupling phase change material(s) and dissipation heat pipe(s). The energy storage system includes several energy storage units serially connected along a same central axis. Each of the energy storage units includes a heat charge flow channel, an annular heat release passage, and an annular energy storage passage disposed concentrically from inside to outside. A dissipation pulsating heat pipe is disposed in the energy storage unit, and the dissipation pulsating heat pipe includes several pulsating-heat-pipe branches uniformly arranged in a circumferential direction.Type: ApplicationFiled: December 1, 2017Publication date: September 26, 2019Applicant: China University of Mining and TechnologyInventors: ZHONGHAO RAO, JIATENG ZHAO
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Publication number: 20190275572Abstract: Disclosed is a method using an environmental-friendly and artificial freezing technique for sealing and displacement of a soil pollutant. The method for displacement of the soil pollutant comprises: performing an artificial freezing technique on an area and depth of a surveyed contaminated site to form a sealed frozen wall along the perimeter of the contaminated site, by using the excellent permeation resistance function of the frozen wall to seal the contaminated site and to prevent the pollutant from spreading further; selecting a freezing temperature of ?10° C. to ?30° C. according to characteristics of the freezing temperature and precipitation rate of the pollutant, by controlling the freezing rate to 1 cm/day to 10 cm/day, and performing freezing displacement of the soil pollutant from outside to inside using a principle of freezing purification, to concentrate the pollutant; and subjecting the remaining high concentration of contaminated soil to chemical treatment.Type: ApplicationFiled: December 1, 2017Publication date: September 12, 2019Applicants: China University of Mining and Technology, CHINA COAL CONSTRUCTION GROUP LIMITED CORPORATIONInventors: Jianzhou WANG, Guoqing ZHOU, Jinhong YANG, Hengchang LIANG, Jie YANG, Tuo CHEN, Guangsi ZHAO, Shuxing LIU, Fengyuan JIU, Heng ZHOU, Haoxuan ZHANG, Dan SONG
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Patent number: 10385692Abstract: 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.Type: GrantFiled: December 1, 2016Date of Patent: August 20, 2019Assignee: China University of Mining and TechnologyInventors: Jixiong Zhang, Qiang Zhang, Yanlong Chen, Kai Quan, Hao Yan
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Publication number: 20190249382Abstract: A stampede preventing method for a pedestrian passage in a confined space of a subway. Pedestrian flow sensors are arranged on a pedestrian passage, where the pedestrian flow sensors are connected to a control unit by means of data transmission lines, the control unit is connected to stampede preventing devices and top ends of the stampede preventing devices are connected to movable walls and handrails; the pedestrian flow sensors transmit a pedestrian number and crowdedness that are monitored in real time; the control unit analyzes signals of the pedestrian flow sensors according to a system program, and determines whether crescent buffer space areas need to be opened in the pedestrian passage; the control unit issues different expansion commands according to different degrees of crowdedness; and the stampede preventing devices control the movable walls and the handrails to start contracting to form the crescent buffer space areas.Type: ApplicationFiled: November 7, 2017Publication date: August 15, 2019Applicants: China University of Mining and Technology, JIANGSU XINCHUANG SAFETY TECHNOLOGY RESEARCH INSTITUTE CO., Ltd.Inventors: Fubao ZHOU, Chun LIU, Zhongyi MAN
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Patent number: 10370942Abstract: A method for combining integrated drilling, flushing and slotting with thermal injection to enhance coalbed gas extraction, applicable to managing gas extraction from microporous, low-permeability, high-adsorption coalbed areas. A gas extraction borehole is drilled within a certain distance of a predetermined drilling, flushing and slotting borehole, and, once sealed, is used for gas extraction. An integrated drilling, flushing and slotting drill bit is used to sink the borehole, which is then sealed. Concentration variation in the gas extraction borehole is monitored in real time, and when concentration is below 30%, borehole is opened and high-temperature steam is injected by means of a steam generator, after which the borehole is again closed.Type: GrantFiled: December 21, 2015Date of Patent: August 6, 2019Assignee: China University of Mining and TechnologyInventors: Baiquan Lin, Ting Liu, Quanle Zou, Chang Guo, Chuanjie Zhu, Hao Yao, Fazhi Yan, Jia Kong, Yidu Hong
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Patent number: 10352167Abstract: 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.Type: GrantFiled: December 1, 2016Date of Patent: July 16, 2019Assignee: China University of Mining and TechnologyInventors: Jixiong Zhang, Nan Zhou, Wenyue Qi, Qiang Zhang, Meng Li
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Publication number: 20190145260Abstract: A method for constructing networked preferential gas migration pathways and diverting and extracting gas. The method proposes that a fracture generation hole, a fracture guidance and development hole, a lateral rupture hole, and a fracture connection hole are respectively constructed in a roof in roadways on two sides of a working face in advance of an advance stress change area. Artificial guided fractures are actively constructed and formed inside the hard roof. Under a mining-induced stress effect, the artificial guided fractures and mining-induced fractures intersect with and are connected to each other to form networked preferential gas migration pathways. Meanwhile, boreholes for artificial guided fractures accelerate roof fracturing to form a rupture bed separation fracture area in a roof. Gas flows and migrates in a timely and efficient manner along networked fracture pathways and concentrates in the rupture bed separation fracture area in the roof.Type: ApplicationFiled: December 1, 2017Publication date: May 16, 2019Applicant: China University of Mining and TechnologyInventors: Baiquan LIN, Tong LIU, Ting LIU, Wei YANG, He LI, Rui WANG, Zheng WANG
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Publication number: 20190145259Abstract: A method for stepwise construction of a preferential gas migration pathway at a stope in a coal seam. First, a gas migration pathway is preliminarily formed at a stope depending on a mining effect of mining in a first mined seam. construction and stabilization method of gob-side entry retaining in deep strata, and a method of manual-guided pre-fracturing boreholes are then used to perform active construction respectively in external space and the outside of coal-rock mass to form preferential gas migration pathways. Eventually, under the effect of mining-induced stress, a system of preferential gas migration pathways connected to each other at the stope is further formed.Type: ApplicationFiled: December 1, 2017Publication date: May 16, 2019Applicant: China University of Mining and TechnologyInventors: Baiquan LIN, Tong LIU, Ting LIU, Wei YANG, He LI, Zhanbo HUANG, Rui WANG, Yihan WANG
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Patent number: 10273091Abstract: A fracture detection system and method for a dumbbell pin of a scraper conveyor. The system comprises a scraper conveyor, a wireless ranging apparatus (2), a wireless communication device, a support controller and a monitoring center. The wireless ranging apparatus (2) is mounted on a ramp plate ledge of a scraper conveyor chute (1), and has a laser range finder and a reflection target plate (24) for detecting a relative displacement between any two adjacent chutes. The wireless communication device realizes communication between the wireless ranging apparatus (2) and the support controller, and transmits the displacement of the laser range finder to the support controller in a wireless transmission manner. The support controller controls an action of the scraper conveyor chute (1). A monitoring center is electrically connected to the support controller, and can perform storage processing on relative displacement data of any adjacent chutes.Type: GrantFiled: December 29, 2015Date of Patent: April 30, 2019Assignee: China University of Mining and TechnologyInventors: Wei Li, Xing Zhang, Zhencai Zhu, Mingquan Qiu, Yong Ren, Gongbo Zhou, Yuxing Peng, Guohua Cao
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Publication number: 20190085691Abstract: 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.Type: ApplicationFiled: December 1, 2016Publication date: March 21, 2019Applicant: China University of Mining and TechnologyInventors: Jixiong ZHANG, Nan ZHOU, Wenyue QI, Qiang ZHANG, Meng LI
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Publication number: 20190085690Abstract: 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.Type: ApplicationFiled: December 1, 2016Publication date: March 21, 2019Applicant: China University of Mining and TechnologyInventors: Jixiong ZHANG, Qiang ZHANG, Yanlong CHEN, Kai QUAN, Hao YAN