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公开(公告)号：US11365624B2
公开(公告)日：2022-06-21
申请号：US17036015
申请日：2020-09-29
Applicant: CHINA UNIVERSITY OF MINING AND TECHNOLOGY, BEIJING , WUHAN CHANGSHENG MINE SECURITY TECHNOLOGY LIMITED
Inventor： Yifan Zeng , Qiang Wu , Chunsheng Liu , Lina Xing
Abstract: Disclosed is a system and a method for monitoring water inrush, including: a host terminal, a field host, at least one controller and at least one electrode array. Each electrode array is placed in one borehole and to detect electric field signals of surrounding rocks around the borehole; each controller connects with one electrode array and is to control the electrode array to carry out a high-density induced polarization measurement on the surrounding rocks; the field host connects with the controller and is to send control signals to the controller, receive and process the electric field signals output by the electrode array; and the host terminal connects with the field host and is to receive the electric field signals processed by the field host, determine changes on apparent resistivity and apparent chargeability of the surrounding rocks, and determine whether there exists water inrush according to the changes.
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42.发明授权公开(公告)号：US11359999B2
公开(公告)日：2022-06-14
申请号：US16666755
申请日：2019-10-29
Inventor： Shengli Yang , Jiachen Wang , Hao Yue , Fengqi Liu , Yanyao Ma , Junjie Wang
Abstract: The present invention provides an experimental platform for simulating a coal rock disaster of a coal mine extraction, including a base device, a coal simulation device, an immediate roof simulation device, a hydraulic support and a removable impact device. The coal simulation device is fixedly disposed on the base device; the hydraulic support is fixed on the base device and is located at one side of the coal simulation device; the immediate roof simulation device is disposed above the coal simulation device and the hydraulic support; the removable impact device is disposed above the immediate roof simulation device; the immediate roof simulation device is a rectangular frame; the rectangular frame is configured to pave a bulk simulation material and an immediate roof simulation material sequentially from the bottom up; and the removable impact device can impact the immediate roof simulation material and the bulk simulation material.
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公开(公告)号：US11312007B2
公开(公告)日：2022-04-26
申请号：US16095717
申请日：2017-06-23
Applicant: China University of Mining and Technology
Inventor： Chaoquan Tang , Gongbo Zhou , Eryi Hu , Hua Zhu , Bi Ma , Xin Shu , Jian Zhao , Xin Chen , Chusheng Liu
Abstract: The invention relates to a serpentine inspection robot mechanism for lifting cage guide driven by magnetic wheels, comprising a magnetic wheel drive part and a pitching yawing part, wherein the magnetic wheel drive part comprises a worm and gear transmission mechanism (I) and a magnetic wheel driving mechanism (II), and the pitching yawing part comprises a pitching yawing mechanism (III). Magnetic wheels are driven by the worm and gear transmission mechanism (I) and the magnetic wheel driving mechanism (II), while the pitching and yawing control of the robot are realized by the pitching yawing mechanism (III). The serpentine robot driven by the magnetic wheels (22) resolves the problems that the efficiency of ordinary serpentine robot is low, and it is difficult for the simple-wheel-type robot to span the large gap and to reach some concealed corners, with the cage guide of the lifting machine sucked by the magnetic wheels (22).
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44.发明申请公开(公告)号：US20220010680A1
公开(公告)日：2022-01-13
申请号：US16487048
申请日：2018-11-16
Applicant: CHINA UNIVERSITY OF MINING AND TECHNOLOGY
Inventor： Yingchao WANG , Chaoyang LI , Shengqi YANG , Qinglei JIAO , Bo MENG , Hongwen JING , Yueming WANG
Abstract: The present disclosure discloses a multi-functional intelligent tunneling apparatus and method for simulating partial excavation of tunnel. The apparatus comprises an operating platform, a multi-functional rotary tunneling system, a precision power propulsion system, an information acquiring and processing system, a digital display control box and a slurry pumping device, wherein, the multi-functional rotary tunneling system includes a plurality of independent operating channels, and can realize multi-functional simulation of a tunnel construction process, including drilling, slurry injecting, and partial excavation under real-time monitoring; under the control of the digital display control box, the precision power propulsion system can realize the fine control of the multi-functional rotary tunneling system by means of hydraulic monitoring and preset advance distance. The present disclosure can simulate partial excavation steps of tunnel well, ranging from drilling, slurry injecting, different partial excavation methods, supporting and data postprocessing and analyzing of test. The operating and testing method are easy, and with high reliability and high degree of automation and intelligence.
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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
46.发明申请公开(公告)号：US20210348471A1
公开(公告)日：2021-11-11
申请号：US16768889
申请日：2018-11-02
Inventor： Bingxiang HUANG , Luying SHAO , Xinglong ZHAO , Shuliang CHEN
Abstract: Provided is a fracturing relief method for stress concentration of remaining ore pillars in an overlying goaf, including first, performing directional fracturing on a roof to optimize the stress of the roof and reduce the source of force; secondly, performing pulse fracturing on a coal pillar to produce a crack network, weaken the stiffness of the coal pillar and reduce the bearing capacity of the coal pillar; and finally, performing pulse fracturing on a floor strata of the coal pillar to reduce the ability of transferring stress concentration thereof. A drilling machine is used for separately constructing fracturing drill holes in a roadway to a set depth at an interval in a direction oblique to the coal pillar in an upper goaf. The roof, the coal pillar and the floor can be fractured by an oblique fracturing hole in a sublevel retreating manner. The position of the directional fracturing of the roof is approximately 1 m above the middle of a main roof above the coal pillar. The method reduces the width of the lower coal pillar, improves the coal mining rate, reduces the deformation of the lower coal roadway, effectively solves the problems of mine pressure passing through the coal pillar on the working face of the lower coal seam, rock burst, and coal and gas outburst in the mining of the lower coal seam, and simultaneously has the advantages of high safety factor, simple method, convenient construction and low cost.
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47.发明申请公开(公告)号：US20210340872A1
公开(公告)日：2021-11-04
申请号：US16624541
申请日：2018-10-29
Applicant: China University of Mining and Technology
Inventor： Nong ZHANG , Zhengzheng Xie , Junyao Zhou , Qun Wei
Abstract: The present invention provides a single-anchor centrally grouted full-length anchored steel wire bundle and a supporting method thereof, which are suitable for use in supporting engineering for the deep dynamic pressure roadway or soft rock roadway. The steel wire bundle consists of parallel steel wires and a central pipe, wherein multiple strands of parallel steel wires are arranged around the central pipe, the central pipe is provided with a slurry output bracket which divides the parallel steel wires into a front part and a rear part, the front part is provided with large stirring jackets, and the rear part is provided with a threaded casing on its tail end. After the coal is cut by a tunneling machine and a roadway is formed, the steel wire bundle is anchored at the ends, and the roadway tunneling speed is increased on a premise of ensuring roadway safety; central grouting is carried out for the steel wire bundle with a pump truck without affecting the quick roadway tunneling, so as to anchor the steel wire bundle in full length and ensure long-time stability of the roadway. The length of the steel wire bundle may be selected according to the geological conditions and the mining environment of the mine, and is not limited by the height of the roadway; the single-anchor centrally grouted supporting method realizes full-length anchoring of the steel wire bundle, and it not only improves the roadway tunneling speed and relieves mining imbalance in the mine, but also solves the problem of large deformation of the roadway.
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公开(公告)号：US20210325285A1
公开(公告)日：2021-10-21
申请号：US16341128
申请日：2018-06-25
Applicant: CHINA UNIVERSITY OF MINING AND TECHNOLOGY
Inventor： Baosheng WANG , Weihao YANG , Jiahui HUANG , Tao HAN , Chi ZHANG , Zhijiang YANG , Tao ZHANG , Yansen WANG , Yanlong REN
Abstract: The present invention relates to a tri-axial mechanical test apparatus and method for simulating the process of freezing the high-pressure water into ice. The tri-axial mechanical test apparatus comprises a main body loading system, a freezing system, and a sample test system; in the main body loading system, a flange, an axial pressure piston and a pressure-bearing shell are constituted to a loading main body, and the axial pressure and confining pressure are controlled directly by a tri-axial servo tester and indirectly by an oil-water separator respectively; in the freezing system, a circumferential freezing liquid circulation channel and a base freezing liquid circulation channel are connected to an external cold source for cooling and freezing, and a dissoluble shell is provided on the periphery of the sample to ensure the shape of ice; in the sample test system, a serial of optical fiber sensors in the sample is connected to an optical fiber data collector, to measure temperature and strain. The present invention cooperates with a tri-axial servo tester, an oil-water separator, an external cold source and an optical fiber data collector, so that the water can be frozen into ice under pressure under the confinement of a dissoluble shell that is dissolved after an ice sample is formed, and then the tri-axial mechanical test can be carried out directly in the original stress state after water is frozen into ice under pressure.
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49.发明申请公开(公告)号：US20210316946A1
公开(公告)日：2021-10-14
申请号：US17042952
申请日：2019-07-26
Applicant: China University of Mining and Technology
Inventor： Hao LU , Zhencai ZHU , Fan JIANG , Wei LI , Yuxing PENG , Gongbo ZHOU , Gang SHEN , Dagang WANG , Yu TANG , Xiang LI
Abstract: The present invention discloses a dynamic reliability evaluation method for coupling faults of a middle trough of a scraper conveyor. Approximation precision of a moment-based saddlepoint approximation method and a function attribute of dynamic t-copula are fully utilized, and the dynamic reliability evaluation method for the coupling faults of the middle trough of the scraper conveyor is provided, so that dynamic correlation between failure modes of the middle trough of the scraper conveyor under a small sample condition is more accurately described, and accuracy of dynamic reliability evaluation of the coupling faults of the middle trough of the scraper conveyor is improved.
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公开(公告)号：US11143025B2
公开(公告)日：2021-10-12
申请号：US16608920
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 , Zhongyu Wu , Feng Ju , Jiaqi Wang , Yang Chen
Abstract: A mine exploitation method based on stoping, separation and filling control is disclosed herein. The method includes deploying a gangue-less coal mining system; choosing a suitable coal and gangue separation method according to a separation requirement; choosing a suitable filling method according to mine geology, production conditions and rock stratum control requirement; reversely calculating a filling rate according to gangue discharge requirement and control indexes by utilizing theoretical calculation, simulation and experiment; determining a filling process and a separation process according to the filling rate; and feeding back and adjusting the filling process and separation process parameters by monitoring filling and control effect indexes.
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