公开(公告)号：US20240159150A1

公开(公告)日：2024-05-16

申请号：US18235899

申请日：2023-08-21

Applicant: China University of Mining and Technology ,  2th Exploration Team of Jiangsu Coal Geological

Inventor： Wanghua SUI ,  Chang ZHOU ,  Shichong YUAN ,  Yuan HANG ,  Shuangcheng TANG ,  Baolei XIE

IPC: E21F17/18

CPC classification number: E21F17/18

Abstract: Provided is an evaluation method of ductility of a grouted rock mass for advanced renovation of a water-sand mixture inrush prevention area including following steps: first, acquiring a spatial distribution law of cracks in overlying strata, and establishing a three-dimensional geological model and a grouted rock mass unit geological model; calculating rock mass quality standard of the target rock strata; performing compression tests on multiple groups of grouted consolidated bodies, and calculating an average value of strain softening indexes of the multiple groups of grouted consolidated bodies; selecting multiple groups of grouted target rock strata, and calculating an average value of unstable fracture ductility of the multiple groups of grouted target rock strata; finally, acquiring a permeability strength of the grouted rock mass, and calculating and grading an evaluation index of ductility of the grouted rock mass,

公开(公告)号：US11930463B1

公开(公告)日：2024-03-12

申请号：US18260532

申请日：2022-09-30

Applicant: CHINA UNIVERSITY OF MINING AND TECHNOLOGY ,  XUZHOU KERUI MINING TECHNOLOGY CO., LTD.

Inventor： Gongbo Zhou ,  Chuansheng Zhang ,  Fan Jiang ,  Lianfeng Han ,  Shudong Wang ,  Xin Liu ,  Duifang Gu ,  Tao Wang ,  Chuansong Wang ,  Libing Wang ,  Niansheng Liu ,  Fuxing Shi ,  Dongrun Liu ,  Lizheng Li ,  Zhencai Zhu

IPC: H04W56/00 ,  H04B10/27 ,  H04W64/00 ,  H04W84/22

CPC classification number: H04W56/001 ,  H04B10/27 ,  H04W64/00 ,  H04W84/22

Abstract: The present disclosure discloses a time service and positioning network system for an underground chain-shaped large space in a coal mine. The system adopts a base station-level network internal time synchronization method which takes an optical fiber time service as a main part and takes a satellite time service as an auxiliary part to construct a time service and positioning network system with an unified time within the ad-hoc network base stations, based on the ad-hoc network base stations linearly arranged in the underground chain-shaped large space in the coal mine. Through the network construction, the network stabilization and the network application, the system unifies the time reference of the base station-level network and improves the positioning accuracy of the network application by utilization of the base station-level network internal time synchronization method. The system integrates the time service and positioning network system suitable for the underground coal mine and expands the network applicability based on an existing underground communication ring network.

公开(公告)号：US11911813B2

公开(公告)日：2024-02-27

申请号：US17585923

申请日：2022-01-27

Applicant: China University of Mining and Technology (Beijing)

Inventor： Yinli Bi ,  Suping Peng

IPC: B09B1/00 ,  E21C41/32

CPC classification number: B09B1/004 ,  E21C41/32

Abstract: An ecological reconstructed sponge structure of a strip mine dump includes a three-layered sponge ecological structure arranged on a groundmass layer of the dump. From bottom to top, the three-layer sponge ecological structure comprises a water-resisting layer, a water-containing layer and a topsoil ecological layer. A thickness of the water-resisting layer is 100˜200 cm, a permeability coefficient of the water-resisting layer is 0.35˜0.7 m/d, and a degree of compaction is 1200˜1400 KPa. A thickness of the water-containing layer is 150˜250 cm, a permeability coefficient of the water-containing layer is 10˜20 m/d, and a degree of compaction is 800˜900 KPa. A thickness of the topsoil ecological layer is 40˜60 cm. Soil layer thicknesses and water content may be monitored through a ground penetrating radar.

公开(公告)号：US11880208B2

公开(公告)日：2024-01-23

申请号：US18022645

申请日：2022-02-23

Applicant: CHINA UNIVERSITY OF MINING AND TECHNOLOGY

Inventor： Chunyu Yang ,  Zhencai Zhu ,  Yidong Zhang ,  Xin Zhang ,  Zhen Gu ,  Qingguo Wang

IPC: G05D1/02 ,  G06V20/56 ,  G06T7/593 ,  G06V20/70 ,  G06V20/40 ,  G06T7/155 ,  G06T7/00 ,  G06T5/20 ,  G06T5/10 ,  G06V20/58

CPC classification number: G05D1/0251 ,  G05D1/0214 ,  G06T5/10 ,  G06T5/20 ,  G06T7/0012 ,  G06T7/155 ,  G06T7/593 ,  G06V20/41 ,  G06V20/58 ,  G06V20/588 ,  G06V20/70 ,  G05D2201/0202 ,  G06T2207/10012 ,  G06T2207/10028 ,  G06T2207/20021 ,  G06T2207/20028 ,  G06T2207/20036 ,  G06T2207/20048 ,  G06T2207/20081 ,  G06T2207/30256 ,  G06T2207/30261

Abstract: A method for drivable area detection and autonomous obstacle avoidance of unmanned haulage equipment in deep confined spaces is disclosed, which includes the following steps: acquiring 3D point cloud data of a roadway; computing a 2D image drivable area of the coal mine roadway; acquiring a 3D point cloud drivable area of the coal mine roadway; establishing a 2D grid map and a risk map, and performing autonomous obstacle avoidance path planning by using a particle swarm path planning method designed for deep confined roadways; and acquiring an optimal end point to be selected of a driving path by using a greedy strategy, and enabling an unmanned auxiliary haulage vehicle to drive according to the optimal end point and an optimal path. Images of a coal mine roadway are acquired actively by use of a single-camera sensor device.

公开(公告)号：US20230416871A1

公开(公告)日：2023-12-28

申请号：US18022571

申请日：2022-10-31

Applicant: China University of Mining and Technology

Inventor： Peng Li ,  Chenlong Duan ,  Guofo Dai

IPC: C22B11/00 ,  B01D61/02 ,  B01D69/02 ,  C23G1/08 ,  C25C1/20

CPC classification number: C22B11/04 ,  B01D61/027 ,  B01D69/02 ,  C23G1/085 ,  C25C1/20 ,  B01D2325/0283

Abstract: The present disclosure provides a method for extracting and recovering gold from an aqueous solution, the method including: (1) gold extraction from an aqueous solution through electrocoagulation, in which an electrocoagulation reaction is performed in an electrolytic cell to produce iron hydroxide in-situ, so as to capture gold in the aqueous solution and reduces the gold into gold nanoparticles in-situ; (2) pickling and liquefaction of the precipitated iron sludge, in which the obtained precipitate is dissolved in nitric acid to dissolve iron flocs after washing treatment; and (3) separation and recovery of gold through a nanofiltration membrane system, in which the resulting solution after pickling the precipitated iron sludge is subjected to cut-off treatment using a nanofiltration membrane to separate nano-sized elemental gold from the solution, and then the resultant is washed with water to obtain elemental gold. The extraction and recovery method of the present disclosure has characteristics of high gold extraction efficiency (up to 100%), low cost, simple process, good stability and environmental protection, and can recover high-grade elemental gold (with a comprehensive recovery rate greater than 95%). The method is of an important significance for technical guidance and practical engineering application for the extraction and recovery of gold in various gold smelting and extraction processes.

公开(公告)号：US11780773B1

公开(公告)日：2023-10-10

申请号：US18300462

申请日：2023-04-14

Applicant: CHINA UNIVERSITY OF MINING AND TECHNOLOGY

Inventor： Jiangyu Wu ,  Dan Ma ,  Hai Pu ,  Qian Yin ,  Haixiang Zhang ,  Zhengfu Bian ,  Liyuan Yu ,  Hongwen Jing ,  Shuo Yang ,  Yiming Wang

IPC: C04B18/14 ,  C04B24/42 ,  C04B14/46 ,  C04B16/06 ,  C04B24/30 ,  C04B24/28 ,  C04B111/70 ,  C04B111/27 ,  C04B111/00

CPC classification number: C04B18/146 ,  C04B14/4643 ,  C04B16/0633 ,  C04B24/282 ,  C04B24/283 ,  C04B24/307 ,  C04B24/42 ,  C04B2111/00008 ,  C04B2111/27 ,  C04B2111/70 ,  C04B2201/50

Abstract: Disclosed are a grouting material for modifying mudstone, a preparation method and an application thereof, belonging to the technical field of material science and geotechnical engineering. The grouting material for modifying mudstone includes the following raw materials: cement, water, superfine micronized powder, water reducer, silane, fiber, diatomite, urea-formaldehyde resin and waterborne polyurethane. The preparation method of the grouting material for modifying mudstone includes steps of: (1) weighing the raw materials in parts by weight, mixing water of 40% of a total amount of water with water reducer, superfine micronized powder, fiber and diatomite, stirring to obtain a material A; (2) adding silane, urea-formaldehyde resin, waterborne polyurethane and residual water into the material A, obtaining a material B after continuous stirring; and (3) adding cement into the material B, and uniformly stirring to obtain the grouting material for modifying mudstone.

公开(公告)号：US11772687B1

公开(公告)日：2023-10-03

申请号：US18029326

申请日：2022-09-30

Applicant: CHINA UNIVERSITY OF MINING AND TECHNOLOGY ,  Xuzhou Kerui Mining Technology Co., Ltd.

Inventor： Zhencai Zhu ,  Fan Jiang ,  Xingtao Huang ,  Gongbo Zhou ,  Niansheng Liu ,  Libing Wang ,  Chuansheng Zhang ,  Junfeng Guo ,  Gang Shen ,  Shuman Cheng ,  Jinlei Ma ,  Chaofan Zhang ,  Wenwen Yi

IPC: B61D11/00 ,  G05D1/02 ,  E21F17/18

CPC classification number: B61D11/00 ,  E21F17/18 ,  G05D1/02 ,  G05D2201/021

Abstract: The present disclosure discloses a low-energy-consumption grading and positioning method and system for a coal mine auxiliary transportation vehicle, which belongs to the technical field of mine tunnel transportation. The method comprises the following steps: S10, determining an optimal transportation route of a vehicle, and dividing the optimal transportation route into a plurality of locked intervals; S20, determining an initial velocity v0 of the vehicle passing through each locked interval; S30, constructing a discretization mileage estimation model to update a real-time position of the vehicle, and obtaining dynamic track information of the vehicle in each locked interval; S40, constructing a [v0, t] prediction model, and obtaining a theoretical time t0 of the vehicle passing through each locked interval through the prediction model; S50, comparing a actual time t and the theoretical time t0 of the vehicle passing through each locked interval, and selecting whether to start overtime early warning or overtime alarm; and S60, repeating S30 to S50 after the vehicle enters the next locked interval. The low-energy-consumption grading and positioning method and system for the coal mine auxiliary transportation vehicle provided in the present disclosure realizes on-demand positioning of the underground vehicle and reduces the consumption and cost of positioning.

公开(公告)号：US20230285953A1

公开(公告)日：2023-09-14

申请号：US18147140

申请日：2022-12-28

Applicant: CHONGQING UNIVERSITY ,  CHINA UNIVERSITY OF MINING AND TECHNOLOGY, BEIJING

Inventor： BAISHENG NIE ,  FANBEI KONG ,  XIANFENG LIU ,  XIANGCHUN LI ,  JUNQING MENG ,  TAO ZHU

IPC: B01J37/34 ,  B01J37/02 ,  B01J23/89 ,  B01J21/06 ,  B01J35/02

CPC classification number: B01J37/341 ,  B01J21/063 ,  B01J23/89 ,  B01J35/023 ,  B01J37/0217

Abstract: The present disclosure provides a noble metal-transition metal-based nano-catalyst thin film and a preparation method thereof, belonging to the fields of energy development and pollutant emission reduction. Based on a micro-nano processing technology, a noble metal-transition metal-based nano-catalyst thin film is loaded on a semi-cylindrical pipe with an inner thread structure, and heat generated is quickly accumulated on an upper surface of the catalyst to establish a large temperature gradient. By the insulation and high roughness of an alumina carrier layer and the inner thread structure of the pipe, a catalyst loading area is maximized and dispersion of noble metal atoms is enhanced. A transition metal-transition metal oxide thin film protects a noble metal nano-catalyst by core-shell wrapping, and a transition metal oxide prevents catalyst deactivation caused by oxygen occupying too many metal active sites.

公开(公告)号：US20230271833A1

公开(公告)日：2023-08-31

申请号：US17775736

申请日：2021-06-11

Applicant: China University of Mining and Technology

Inventor： Lang XU ,  Jiawei QI ,  Haishen JIANG ,  Peiyao BAI ,  Weiqi LIU ,  Bailin JIN ,  Wendu ZHANG

IPC: C01B32/05

CPC classification number: C01B32/05 ,  C01P2006/12 ,  C01P2006/40 ,  C01P2006/14 ,  C01P2004/03 ,  C01P2004/04 ,  C01P2002/70 ,  C01P2002/82 ,  C01P2002/85

Abstract: A preparation method of nitrogen-phosphorus doped porous carbon for oxygen reduction electrocatalysis within a wide pH range, which uses natural mineral-based carbon sources as raw material and uses a sequential nitrogen and phosphorus doping process for synthesizing in two paths. The method provided may be highly cost-effective, sustainable, and suitable for large-scale utilization.

公开(公告)号：US20230258083A1

公开(公告)日：2023-08-17

申请号：US17922128

申请日：2021-04-30

Applicant: China University Of Mining And Technology, Beijing

Inventor： Jiong Wang ,  Wenfei Li ,  Zimin Ma ,  Guangyuan Yu

IPC: E21C41/18 ,  E21F1/00 ,  E21F16/00

CPC classification number: E21C41/18 ,  E21F1/00 ,  E21F16/00

Abstract: The present disclosure relates to the technical field of coal mining, and in particular, to a mining method without coal pillars with roof-cutting and roadway retaining, comprising: constructing a gas drainage roadway and eliminating outbursts in a working face transport gate area and a working face track gate area on opposite sides of a first mining working face; constructing the working face track gate, the working face transport gate, a first process roadway and a second process roadway, one end of the working face track gate is communicated with an air return roadway, the other end is communicated with the gas drainage roadway by the first process roadway, one end of the working face track gate is communicated with the air return roadway, the other end is communicated with the gas drainage roadway by the second process roadway; stoping the working face, forming an roadway retaining section, the roadway retaining section is communicated with the gas drainage roadway by the first process roadway and the second process roadway, forming a ventilation system. Make full use of the existing gas drainage roadway to meet the roadway layout requirements using the 110 construction method, increasing the use function of the roadway and increasing the reuse rate of the roadway, reducing the roadway engineering quantity before production, shortening the construction period and reduce the cost.