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公开(公告)号：US12091972B1
公开(公告)日：2024-09-17
申请号：US18596373
申请日：2024-03-05
发明人： Yifan Zeng , Aoshuang Mei , Qiang Wu , Huaming Wei , Yashuai Cui , Shihao Meng , Weihong Yang , Kai Pang , Liang Yang , Yidi Xing
CPC分类号： E21C41/18 , E21C39/00 , E21C2100/00 , E21F17/18
摘要： Disclosed are a method and a related device for determining a development status of a separation layer in a coal mine. The method includes: obtaining surface subsidence variation data of the coal mine within a preset time interval, rock stress variation data of a caving zone of the coal mine and water pressure variation data; determining a height decrease of the caving zone based on the rock stress variation data and the water pressure variation data; and determining the development status of the separation layer of the coal mine based on the height decrease and the surface subsidence variation data.
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公开(公告)号：US12091971B2
公开(公告)日：2024-09-17
申请号：US18346104
申请日：2023-06-30
发明人： Yifan Zeng , Shihao Meng , Qiang Wu , Lu Wang , Shijie Tang , Xuedong Kan , Chao Yu , Han Bao
IPC分类号： E21B47/11 , E21B33/124 , E21C39/00 , E21F16/00
CPC分类号： E21C39/00 , E21B33/1243 , E21B47/11 , E21F16/00
摘要： A tracer diffusion device includes: a first container, a second container, a drilling pipe, a unidirectional driving device, and a bidirectional driving device. The first container holds a first fluid containing a tracer. The second container holds a second fluid. A first end of the drilling pipe is connected to the first container; a second end of the drilling pipe is extended into a borehole and equipped with a first sealing capsule and a second sealing capsule. A plurality of through holes are arranged on the drilling pipe between the first sealing capsule and the second sealing capsule. The unidirectional driving device is arranged on the drilling pipe, for injecting the first fluid from the first container into the borehole between the first sealing capsule and the second sealing capsule. The bidirectional driving device is arranged between the second container and the first sealing capsule.
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公开(公告)号：US12037905B2
公开(公告)日：2024-07-16
申请号：US17604113
申请日：2020-04-15
发明人： Jiong Wang , Manchao He , Guangyuan Yu , Han Sun
摘要： The present disclosure relates to a technical field of coal mining, particularly to a method of no-pillar mining with gob-entry retaining adapted for fully-mechanized top coal caving in a thick coal seam, which comprises the following steps: reinforcing support on a roof and two sides of a roadway; performing roof slitting blasting to form a pre-splitting slit; erecting a temporary support device and a gangue retaining device in the roadway along the retained entry; performing no caving within a range of a preset distance at an end of the working face near the retained entry side; and removing the temporary support device in the roadway after entry forming stabilizes, and closing the goaf to complete entry retaining. The roof slitting blasting is more beneficial to collapse of strata in the goaf, so that the strata in the slit can better fill stoping space after collapse, and the roof of the retained entry forms a short arm beam structure laterally, which avoids forming a long suspended roof in the goaf, and improves the stress of surrounding rock of gob-side entry retaining; coal caving is not performed in a certain range at the end of the working face of the retained entry side, which further ensures the filling effect of the goaf on the retained entry side, effectively limits the rotary sinking of blocks of the main roof, and greatly reduces effect on the stability of the retained entry.
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公开(公告)号：US11976914B1
公开(公告)日：2024-05-07
申请号：US18370545
申请日：2023-09-20
申请人： UNIVERSITY OF SCIENCE AND TECHNOLOGY BEIJING , CHINA UNIVERSITY OF MINING AND TECHNOLOGY, BEIJING
发明人： Renshu Yang , Yanbing Wang , Chengxiao Li , Zhaoran Zhang , Xinmin Ma , Hang Zhang , Zhouqi Bao
摘要： An efficient blasting method for similar cutting in a rock tunnel is provided, which relates to the technical field of rock tunneling. The method includes the following steps: drilling: drilling central holes, lower cutting holes, upper cutting holes, auxiliary holes and peripheral holes in a cross section area for tunnel construction; filling explosives: filling explosives into the central holes, the lower cutting holes, the upper cutting holes, the auxiliary holes and the peripheral holes; and blasting: blasting following blast holes in turn to complete full-face one-time blasting in a millisecond delay blasting mode. The method is applicable for construction scenes of drilling and blasting methods.
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5.发明公开公开(公告)号：US20240141783A1
公开(公告)日：2024-05-02
申请号：US18346104
申请日：2023-06-30
发明人： Yifan ZENG , Shihao MENG , Qiang WU , Lu WANG , Shijie TANG , Xuedong KAN , Chao YU , Han BAO
摘要： A tracer diffusion device includes: a first container, for holding a first fluid containing a tracer; a second container, for holding a second fluid; a drilling pipe; wherein, a first end of the drilling pipe is connected to the first container; a second end of the drilling pipe is extended into a borehole; and the second end of the drilling pipe is equipped with a first sealing capsule and a second sealing capsule; a plurality of through holes are arranged on the drilling pipe between the first sealing capsule and the second sealing capsule; a unidirectional driving device, arranged on the drilling pipe, for injecting the first fluid from the first container into the borehole between the first sealing capsule and the second sealing capsule; and a bidirectional driving device, arranged between the second container and the first sealing capsule.
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6.发明公开公开(公告)号：US20230175398A1
公开(公告)日：2023-06-08
申请号：US17922066
申请日：2021-04-30
发明人： Jiong Wang , Wenfei Li , Zimin Ma , Guangyuan Yu , Manchao He , Gonghua Chen , Guoqiang Xiao
摘要： The present disclosure relates to the technical field of mine ventilation, and in particular, to a three-dimensional ventilation method and system for mining by 110 construction method in coal and gas outburst mines. The three-dimensional ventilation method comprises: constructing a first process roadway and/or a second process roadway before stopping the working face; forming a first roof-cutting and roadway retaining section by a part of the working face track gate located in the goaf, and/or forming a second roof-cutting and roadway retaining section by a part of the working face transport gate located in the goaf during the stopping process of the working face, so that the air inlet of the first roof-cutting and roadway retaining section enters the gas drainage air return roadway through the first process roadway to form return air, and/or the inlet air of the second roof-cutting and roadway retaining section enters the gas drainage air inlet roadway through the second process roadway to form return air, the three-dimensional ventilation system is constructed by using the gas drainage air inlet roadway and the gas drainage air return roadway, during the conversion from the 121 construction method to the 110 construction method, a complete ventilation system can be formed in the roadway retaining section, real-time monitoring of the roadway retaining section can be carried while eliminating harmful gas accumulation in the retaining section.
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公开(公告)号：US20220275726A1
公开(公告)日：2022-09-01
申请号：US17604113
申请日：2020-04-15
发明人： Jiong WANG , Manchao HE , Guangyuan YU , Han SUN
摘要： The present disclosure relates to a technical field of coal mining, particularly to a method of no-pillar mining with gob-entry retaining adapted for fully-mechanized top coal caving in a thick coal seam, which comprises the following steps: reinforcing support on a roof and two sides of a roadway; performing roof slitting blasting to form a pre-splitting slit; erecting a temporary support device and a gangue retaining device in the roadway along the retained entry; performing no caving within a range of a preset distance at an end of the working face near the retained entry side; and removing the temporary support device in the roadway after entry forming stabilizes, and closing the goaf to complete entry retaining. The roof slitting blasting is more beneficial to collapse of strata in the goaf, so that the strata in the slit can better fill stoping space after collapse, and the roof of the retained entry forms a short arm beam structure laterally, which avoids forming a long suspended roof in the goaf, and improves the stress of surrounding rock of gob-side entry retaining; coal caving is not performed in a certain range at the end of the working face of the retained entry side, which further ensures the filling effect of the goaf on the retained entry side, effectively limits the rotary sinking of blocks of the main roof, and greatly reduces effect on the stability of the retained entry.
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8.发明授权公开(公告)号：US11371320B2
公开(公告)日：2022-06-28
申请号：US17296224
申请日：2020-04-24
发明人： Yang Ju , Jinxin Song , Peng Liu
摘要： An experimental method and system for simulating the evolution of reservoir fracture stress field, the experimental method comprises the following steps: (S1) preparing horizontal well fracturing model (100); (S2) applying boundary loads and constraints to the horizontal well fracturing model (100); (S3) injecting fracturing fluid or fracturing gas into a fracturing wellbore (130) of the horizontal well fracturing model (100) after loading for fracturing; in a fracturing stage, a photoelastic fringe image of the horizontal well fracturing model (100) is obtained by an optical phase shift method; the fracturing stage comprises an initial state before fracturing fluid or fracturing gas is injected and an end state after fracturing is completed. The experimental method and system can effectively simulate the whole process of horizontal well fracturing, and accurately obtain the variation law of reservoir stress field and its influence on crack propagation during horizontal well fracturing.
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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
申请人： CHINA UNIVERSITY OF MINING AND TECHNOLOGY, BEIJING , WUHAN CHANGSHENG MINE SECURITY TECHNOLOGY LIMITED
发明人： Yifan Zeng , Qiang Wu , Chunsheng Liu , Lina Xing
摘要： 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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10.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
发明人： Shengli Yang , Jiachen Wang , Hao Yue , Fengqi Liu , Yanyao Ma , Junjie Wang
摘要： 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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