公开(公告)号：US20210148228A1

公开(公告)日：2021-05-20

申请号：US16626328

申请日：2019-04-01

Applicant: China University of Mining and Technology ,  XUZHOU ZHONGKUANG BACKFILLING & MINING TECHNOLOGY CO.,LTD

Inventor： Jixiong ZHANG ,  Qiang ZHANG ,  Wenyue QI ,  Meng LI ,  Jianfeng SUN ,  Guohao MENG

IPC: E21C41/18 ,  E21F15/00

Abstract: The present invention discloses a mine exploitation, separation and filling and X exploitation mode, including four “exploitation, separation and filling and X” exploitation modes, namely an “exploitation, separation and filling and retaining” exploitation mode, an “exploitation, separation and filling and treatment” exploitation mode, an “exploitation, separation and filling and extraction” exploitation mode, and an “exploitation, separation and filling and control” exploitation mode. The selection of the “exploitation, separation and filling and X” exploitation mode is determined by actual engineering needs. A goaf filling rate is designed to meet the actual engineering needs of the mine, solve the technical problems in mine resource exploitation, and realize the objective of green, harmonious and safe exploitation of coal resources. Compared with an original “exploitation, separation and filling” exploitation mode, the “exploitation, separation and filling and X” exploitation mode is more systematic and comprehensive and is beneficial to engineering promotion and application.

公开(公告)号：US20210148205A1

公开(公告)日：2021-05-20

申请号：US16759733

申请日：2018-10-29

Applicant: CHINA UNIVERSITY OF MINING AND TECHNOLOGY ,  XUZHOU BOAN SCIENCE & TECHNOLOGY DEVELOPMENT CO.,LTD

Inventor： Baiquan LIN ,  Yang ZHAO ,  Wei YANG ,  Qingzhao LI

IPC: E21B43/247 ,  E21B43/00 ,  E21B43/16 ,  E21B43/26

Abstract: The disclosure provides a method for extracting gas by fracturing a coal seam through a combination of hydraulic slotting and multi-stage combustion impact wave, comprising first cutting slots in an impact borehole using a hydraulic slotting equipment to perform pressure relief and permeability enhancement on a coal seam and enlarge a N2 or CO2 storage space, then injecting a large amount of N2 or CO2 into the borehole by means of a high pressure gas cylinder and a pressure reducing valve through a gas injection and extraction pipe, then injecting a certain amount of methane and dry air into a high-temperature and high-pressure combustion chamber by means of the high pressure gas cylinder and the pressure reducing valve, so that the gases are mixed and combusted to form high-temperature and high-pressure impact wave to push a piston to compress the N2 or CO2, thereby generating a large number of factures on the coal seam around the impact borehole under guiding action of the slots. The impact wave is repeatedly generated to form a multi-stage impact, and the impact of the next stage is based on the impact of the previous stage, so that the fractures on the coal seam around the borehole are further expanded and run through. After the N2 or CO2 is compressed by means of the multi-stage impact, more fracture networks are formed on the coal seam around the borehole under the guiding action of the slots and the fractures, thereby enhancing the borehole-based efficient gas extraction.

公开(公告)号：US10989695B2

公开(公告)日：2021-04-27

申请号：US16760040

申请日：2019-07-01

Applicant: China University of Mining and Technology

Inventor： Zhencai Zhu ,  Hao Lu ,  Shuang Cao ,  Yuxing Peng ,  Gongbo Zhou ,  Guohua Cao ,  Gang Shen ,  Wei Li ,  Dagang Wang ,  Fan Jiang

IPC: G01N29/04 ,  G08C17/02 ,  B66D1/48 ,  G01N29/22

Abstract: Disclosed are an online monitoring system for a crack on a hoist spindle and an operation method thereof. The system comprises: a rope power part, a crack detection part, a wireless transmission part, and a computer. The rope power part comprises two traction ropes, two guide wheels, two stepper motors, and two stepper motor drivers. The crack detection part comprises a spiral tube guide rail, a sliding body, and an ultrasonic generator. The wireless transmission part comprises three zigbee wireless sensing modules. The zigbee wireless sensing modules receive instructions from the computer and transmit the instructions to the stepper motor drivers to control the motors to rotate. The stepper motors drive the guide wheels to rotate to realize the winding of the ropes, so as to pull the sliding body to slide on the spiral tube guide rail. The ultrasonic generator clamped on the sliding body monitors the rotating spindle along the spiral tube guide rail. The zigbee wireless sensing modules transmit the detected data to the computer in real time. The present invention can effectively monitor a hoist spindle in time before a failure occurs, thereby avoiding safety accidents.

公开(公告)号：US20210094045A1

公开(公告)日：2021-04-01

申请号：US15733895

申请日：2019-04-22

Applicant: CHINA UNIVERSITY OF MINING AND TECHNOLOGY

Inventor： Xiahui GUI ,  Min LIU ,  Yaowen XING ,  Yangchao XIA ,  Yijun CAO ,  Jiaqian LUO ,  Peikun LIU ,  Zhigang WANG

IPC: B03B9/00 ,  B03B7/00

Abstract: Disclosed is an underground coal preparation process adopting a water medium, comprising: feeding raw coal into a special underground compact jigging machine to discharge overflow clean coal being dewatered through a φ1 mm fixed screen and screened through a φ13 mm classifying screen, and dewatering powder clean coal with a particle size less than 13 mm to obtain powder clean coal and a centrifugate; grading jigging middling coal by means of a φ13 mm classifying screen into block middling coal and powder middling coal, and dewatering the powder middling coal to obtain powder middling coal and a centrifugal liquid; and sending produced coal slime water to a water medium classifying and separation cyclone, and the obtained coarse middling coal slime and coarse clean coal slime respectively passing through a coarse middling and clean coal slime sieve bends, and then being dewatered.

公开(公告)号：US10941659B2

公开(公告)日：2021-03-09

申请号：US16745650

申请日：2020-01-17

Applicant: China University of Mining and Technology (Beijing)

Inventor： Renliang Shan ,  Haochen Zhang ,  Xiangsong Kong

IPC: E21F17/103 ,  E21F17/16

Abstract: The present invention discloses an I-shaped water-retaining dam for an underground reservoir in a coal mine. The I-shaped water-retaining dam is located between coal pillar dams to isolate an underground reservoir from a corresponding coal roadway. The I-shaped water-retaining dam includes an upper flange plate, a web plate, and a lower flange plate from top to bottom, where a vertical face of a dam body is of an I shape; the upper flange plate extends into a roadway roof; two ends of the web plate are embedded into the coal pillar dams; and the lower flange plate extends into a floor. The I-shaped water-retaining dam is located in an underground coal roadway, and bears complex surrounding rock stress. The present invention effectively overcomes water seepage of a weak part at an upper part of a conventional I-shaped water-retaining dam.

公开(公告)号：US10935084B2

公开(公告)日：2021-03-02

申请号：US16095242

申请日：2017-12-12

Applicant: CHINA UNIVERSITY OF MINING AND TECHNOLOGY ,  XUZHOU ZHIRUN MINING EQUIPMENT SCIENCE AND TECHNOLOGY CO., LTD.

Inventor： Qingrui Meng ,  Fan Jiang ,  Zuzhi Tian ,  Chenghao Zhao ,  Xin Zhang

IPC: F16D25/10 ,  F16D25/12 ,  F16D43/284 ,  F16D43/30

Abstract: A hydro-viscous speed regulating device for heavy-load start of a belt conveyor is provided. An input shaft and an output shaft are connected through a spline tube, an inner friction plate set, and an outer friction plate set. The inner and outer friction plate sets are controlled by an inner oil cylinder and an outer oil cylinder respectively. Oil inlet and oil return of the inner oil cylinder and the outer oil cylinder are controlled by an oil inlet valve core and an oil return valve core automatically. During starting process, pressure oil enters into the outer oil cylinder, and pushes the outer friction plate set to be engaged to provide torque required by the output shaft. After the starting process is completed, the revolving speed of the output shaft rises; the oil inlet valve core and the oil return valve core move outward under the effect of a centrifugal force; the pressure oil enters into the inner oil cylinder and pushes the inner friction plate set to be engaged to provide torque required by the output shaft, and at the same time, oil returns to the outer oil cylinder. That is, during starting process, the outer friction plate set provides large torque required for start, and the inner friction plate set provides small torque during normal operation. The present invention achieves automatic switching between different torque required for start and normal operation. Moreover, the present invention has a compact structure, reliable performance, and low costs, and is applicable in a wide range.

公开(公告)号：US20210010373A1

公开(公告)日：2021-01-14

申请号：US16766712

申请日：2019-06-18

Applicant: CHINA UNIVERSITY OF MINING AND TECHNOLOGY ,  XUZHOU GOLDFLUID HYDRAULIC TECHNOLOGY DEVELOPMENT CO., LTD.

Inventor： Zhongbin WANG ,  Xuliang LU ,  Chao TAN ,  Haifeng YAN ,  Lei SI ,  Xingang YAO

IPC: E21D15/51 ,  G01C21/16

Abstract: A hydraulic support monitoring a support pose in real time based on an inertia measurement unit (IMU) and a detection method thereof. In the hydraulic support, IMU sensors are separately mounted on a roof beam, a rear linkage, and a base, and an auxiliary support pose monitoring system is disposed. Each IMU sensor measures movement states of the roof beam, the rear linkage, and the base of the support in real time, and the support pose monitoring system processes the movement states to monitor a support pose of the hydraulic support in real time. Especially, it can be technically determined whether the hydraulic support is adequately lowered, moved or raised, thereby effectively reducing the labor intensity of workers and improving the working efficiency of the hydraulic support.

公开(公告)号：US10882700B1

公开(公告)日：2021-01-05

申请号：US16967735

申请日：2019-09-12

Applicant: China University of Mining and Technology ,  ANHUI UNIVERSITY OF SCIENCE AND TECHNOLOGY ,  HUAIHAI INSTITUTE OF TECHOLOGY

Inventor： Yu Tang ,  Zhencai Zhu ,  Gang Shen ,  Yongcun Guo ,  Xiang Li ,  Jinsong Chen ,  Tongqing Li ,  Dagang Wang ,  Guohua Cao ,  Wei Li ,  Gongbo Zhou ,  Yuxing Peng ,  Hao Lu

IPC: B65G43/00 ,  B65G19/22

Abstract: The present invention discloses an embedded scraper rotation angle detection device for a scraper conveyor and a detection method. The detection device includes two extensible detection devices, two signal detection units and a remote processing unit. The two extensible detection devices and the two signal detection units are disposed at two ends of a scraper respectively. The signal detection units detect movement displacements of the extensible detection devices in real time and send out signals through wireless transmission modules, the wireless transmission modules and a wireless receiving module are used for data transmission, and a signal display processing module is used to calculate a rotation angle value of the scraper in real time, output and display the rotation angle value simultaneously, compare the rotation angle value measured in real time with a set safety threshold, and send out an alarm indication when the rotation angle value exceeds the safety threshold.

公开(公告)号：US20200377336A1

公开(公告)日：2020-12-03

申请号：US16613806

申请日：2018-09-21

Applicant: China University of Mining and Technology ,  XUZHOU ZHIRUN MINING EQUIPMENT SCIENCE AND TECHNOLOGY CO., LTD. ,  INNER MONGOLIA UNIVERSITY OF TECHNOLOGY

Inventor： Guohua CAO ,  Zhencai ZHU ,  Ying WANG ,  Ke WANG ,  Chunli HUA ,  Gongbo ZHOU ,  Weihong PENG ,  Yuxing PENG ,  Wei LI ,  Yu TANG ,  Shanzeng LIU ,  Xin ZHANG

IPC: B66B5/28 ,  B66B5/02

Abstract: A device for cage jamming buffer of large-tonnage hoisting system of ultra-deep shaft is provided. End cage jamming buffer mechanisms are added at both ends of an automatic wire rope tension balancing mechanism, wherein the end cage jamming buffer mechanisms include an end buffer module and an end fixing module, and the end buffer module and the end fixing module are respectively mounted on shafts of the automatic wire rope tension balancing mechanisms at two ends. The end buffer module mainly consists of a buffer bearing pedestal, a limit block, a buffer block, and a stop block sequentially mounted on the shaft of the automatic wire rope tension balancing mechanism at one end. The end fixing module mainly consists of a fixing bearing pedestal and a fixing block mounted on the shaft, wherein the fixing bearing pedestal is connected to a transmission gear by an adjusting bolt, and the fixing block is located between the transmission gear and the fixing bolt.

公开(公告)号：US10830044B1

公开(公告)日：2020-11-10

申请号：US16632375

申请日：2019-06-18

Applicant: CHINA UNIVERSITY OF MINING AND TECHNOLOGY ,  XUZHOU GOLDFLUID HYDRAULIC TECHNOLOGY DEVELOPMENT CO., LTD.

Inventor： Chao Tan ,  Zhongbin Wang ,  Hongya Zhou ,  Lei Si ,  Xinhua Liu ,  Xuliang Lu ,  Xiaoyu Li ,  Bowen Liu ,  Yue Wu ,  Honglin Wu

IPC: E21D23/12 ,  H04L12/40 ,  E21D23/14

Abstract: A system and method for remotely locating a communication error support for hydraulic supports. The system includes a control panel, a support controller, a data converter, and two support drivers of the same type. Each support driver has two bus interfaces. The control panel transmits a control command to the data converter in a form of a WiFi signal. The data converter converts the WiFi signal into a message signal and transmits the message signal to the support controller. The support controller transmits the control command to the two support drivers, respectively. The support drivers transmit the command through CANH twisted pairs and CANL twisted pairs. When a bus for transmitting the command of a certain node has an error, the support controller calculates the fault node according to a formula n = p ⁢ t 8 ⁢ m , and feeds back the fault node onto the control panel.