公开(公告)号：US10378327B2

公开(公告)日：2019-08-13

申请号：US15321891

申请日：2015-12-22

Applicant: CHINA UNIVERSITY OF MINING AND TECHNOLOGY

Inventor： Baiquan Lin ,  Quanle Zou ,  Ting Liu ,  Chang Guo ,  Chuanjie Zhu ,  Jia Kong ,  Fazhi Yan ,  Hao Yao ,  Yidou Hong

IPC: E21B36/00 ,  E21B43/24 ,  E21B43/267 ,  E21F7/00 ,  E21B43/114

Abstract: A gas extraction method in which high energy gas fracturing technology is used to form a fracture network in a thermal injection borehole. Then high-pressure, cyclically temperature-changing steam is injected into the borehole using a spinning oscillating-pulse jet nozzle to form oscillating superheated steam, alternatingly impacting and heating the coal body. The high energy gas forms a fracture network that provides channels for passage of the superheated steam, while oscillating changes in steam temperature and pressure also promote crack propagation and perforation of the coal body; the combined effect of alternation of the two enhances gas desorption and extraction efficiency.

公开(公告)号：US10022668B2

公开(公告)日：2018-07-17

申请号：US14898323

申请日：2014-11-05

Applicant: CHINA UNIVERSITY OF MINING AND TECHNOLOGY

Inventor： Baiquan Lin ,  Qingzhao Li

IPC: A61L9/00 ,  F23D14/00 ,  B01D53/86 ,  E21F7/00 ,  B01D53/44

Abstract: Disclosed is a self-regenerative integrated device for the synergetic oxidation of low-concentration gas and ventilation gas in a coal mine. The integrated device comprises a metal shell (5). A honeycomb ceramic oxidation bed (13) is arranged within the metal shell (5) and divided into a regenerative section (40) and an oxidation section (41) by a heat exchange chamber (14). A first cavity between the regenerative section (40) and the inner wall of the metal shell (5) is divided into a first inlet chamber (6) and an exhaust chamber (8) by an inlet partition plate (7), a second cavity between the oxidation section (41) and the inner wall of the metal shell (5) is divided into a second inlet chamber (22) and a mixing chamber (20) by a partition plate (21) for averaging gas, and a plurality of gas nozzles (28) are provided on the partition plate (21) for averaging gas. An internal heat exchanger (35) is arranged within the heat exchange chamber (14), and a heat exchanger inlet (16) and a heat exchanger outlet (15) of the internal heat exchanger (35) are respectively connected with a boiler drum (18). The first inlet chamber (6) is connected with an inlet (1) of the ventilation gas through a proportional control valve (38), the second inlet chamber (22) is connected with an inlet (31) for extracting the low-concentration gas through a proportional mixer (33), and the proportional control valve (38) is connected with the proportional mixer (33) through a connecting pipeline (36). The two ends of an inlet preheating pipe (9) on the honeycomb ceramic oxidation bed (13) are respectively communicated with the first inlet chamber (6) and the mixing chamber (20).

公开(公告)号：US09951597B1

公开(公告)日：2018-04-24

申请号：US15325662

申请日：2015-12-28

Applicant: CHINA UNIVERSITY OF MINING AND TECHNOLOGY

Inventor： Baiquan Lin ,  Fazhi Yan ,  Chuanjie Zhu ,  Chang Guo ,  Quanle Zou ,  Ting Liu ,  Yidu Hong ,  Hao Yao

IPC: E21B43/26 ,  E21B43/30

CPC classification number: E21B43/26 ,  E21B43/30

Abstract: A method for permeability improvement for a downhole coal seam by directional fracturing with pulsed detonation waves, which is applicable to gas control in coal seam areas with high gas concentration and low air permeability. The permeability improvement method is as follows: first, drilling a pulsed detonation borehole and pulsed detonation guide boreholes from a coal roadway to a coal seam respectively; then, pushing a positive electrode connected to a positive output side of an explosion-proof high-voltage electrical pulse generator to the bottom of the pulsed detonation borehole and pushing a negative electrode connected to a negative output side of the explosion-proof high-voltage electrical pulse generator to the bottom of the pulsed detonation guide borehole; connecting the pulsed detonation borehole and the pulsed detonation guide boreholes to an extraction pipeline for gas extraction, after electrical pulsed detonation fracturing for the coal seam is carried out. The method disclosed in the present invention utilizes the high instantaneous energy provided by electrical pulsed detonation waves to fracture a coal mass, so as to form a fissure network in the coal mass between the pulsed detonation borehole and the pulsed detonation guide boreholes; thus, the air permeability coefficient of the coal mass can be increased by 200-400 times, the effective influence scope of gas extraction of a single borehole for gas extraction can be enlarged by 3-4 times, the extracted gas volume from the borehole can be increased by 3-8 times, and the coal seam gas pre-extraction time can be shortened effectively.

公开(公告)号：US09869168B2

公开(公告)日：2018-01-16

申请号：US15323272

申请日：2015-12-09

Applicant: China University of Mining and Technology

Inventor： Baiquan Lin ,  Yidou Hong ,  Chuanjie Zhu ,  Hao Yao

IPC: E21B43/24 ,  E21B33/14 ,  E21B43/30

CPC classification number: E21B43/24 ,  E21B33/14 ,  E21B43/30 ,  E21F7/00

Abstract: A method for thermal-displacement-type strengthened extraction in a drill hole, suitable for efficient gas extraction in a coal mine, the method comprising the following steps: arranging an extraction drill hole and a thermal displacement drill hole at intervals in a coal seam; continuously heating coal in the drill hole to form a stable temperature field by using a heat pipe; and significantly reducing gas adsorption potential by utilizing a heat effect, prompting gas desorption, and strengthening gas extraction. The method enlarges a range of effective pressure relief influence of a single hole, increases an extraction efficiency of gas in a coal seam by more than 40%, is safe, reliable and low-cost, and is easy to operate, saving both time and labor.

公开(公告)号：US20170152734A1

公开(公告)日：2017-06-01

申请号：US15323272

申请日：2015-12-21

Applicant: China University of Mining and Technology

Inventor： Baiquan Lin ,  Yidu Hong ,  Chuanjie Zhu ,  Hao Yao

IPC: E21B43/24 ,  E21B43/30 ,  E21B33/14

CPC classification number: E21B43/24 ,  E21B33/14 ,  E21B43/30 ,  E21F7/00

Abstract: A method for thermal-displacement-type strengthened extraction in a drill hole, suitable for efficient gas extraction in a coal mine, the method comprising the following steps: arranging an extraction drill hole and a thermal displacement drill hole at intervals in a coal seam; continuously heating, by using a heat pipe (5), coal in the drill hole to form a stable temperature field; and significantly reducing gas adsorption potential by utilizing a heat effect, prompting gas desorption, and strengthening gas extraction. The method enlarges a range of effective pressure relief influence of a single hole, increases an extraction efficiency of gas in a coal seam by more than 40%, is safe, reliable and low-cost, and is easy to operate, and saves both time and labour.

公开(公告)号：US20150159470A1

公开(公告)日：2015-06-11

申请号：US14416004

申请日：2014-01-27

Applicant: CHINA UNIVERSITY OF MINING AND TECHNOLOGY

Inventor： Baiquan Lin ,  Qingzhao Li

IPC: E21B36/00 ,  E21B43/12 ,  E21B41/00

CPC classification number: E21B36/00 ,  E21B36/006 ,  E21B41/0085 ,  E21B43/122 ,  E21F3/00 ,  E21F7/00 ,  Y02P80/156

Abstract: A distributed combined cooling, heating and power energy system for gas extraction in a coal mining area, which belongs to an energy system for gas production. A gas extraction pump station, a gas storage tank, a water-sealing flame arrester, a wire mesh filter, a first pipeline flame arrester, a wet-type bleeding valve and a cyclone dehydrator are sequentially connected; an outlet of the cyclone dehydrator is divided into two branches, one branch sequentially connected with a second pipeline flame arrester, a proportioning mixer, a gas power machine, a waste heat boiler and a waste heat-type double-effect lithium bromide absorption water chiller/heater unit, and the other connected with a gas-type double-effect lithium bromide absorption water chiller/heater unit; a first power generator is connected with the gas power machine, a water storage tank outlet is connected with a pressurizing pump, a second power generator is connected with a steam turbine and driven by the steam power machine to generate power, and cold/hot water of the waste heat-type water chiller/heater unit and the gas-type water chiller/heater unit is delivered through an energy supply pipeline after collection and mixing. With the power energy system mining area, clean production and utilization of coal-mine gas and economic development of coal mine areas are realized.

Abstract translation: 煤矿区瓦斯抽采分布式联合制冷，供热能源系统，属于天然气生产能源系统。 依次连接气体抽取泵站，储气罐，水封阻火器，丝网过滤器，第一管道阻火器，湿式排气阀和旋风脱水器; 旋风脱水器的出口分为两个分支，一个分支依次与第二管道阻火器连接，配比混合器，燃气动力机，废热锅炉和废热式双效溴化锂吸收式水冷却器 /加热器单元，另一个连接气体型双效溴化锂吸收式制冷机/加热器单元; 第一发电机与燃气动力机连接，蓄水箱出口与加压泵连接，第二发电机与蒸汽轮机连接，由蒸汽动力机驱动发电，冷热水 的废热式水冷却器/加热器单元和气体型水冷却器/加热器单元在收集和混合后通过能量供应管道输送。 随着电力能源系统矿区，煤矿瓦斯清洁生产利用和煤矿经济发展实现。