矿业科学技术学报(英文版)2023，Vol.33Issue(11) ：1397-1410.DOI:10.1016/j.ijmst.2023.07.003

Study of a low-disturbance pressure-preserving corer and its coring performance in deep coal mining conditions

Wei Huang Jianan Li Zhiqiang Liu Mingqing Yang Zhenxi You Heping Xie
矿业科学技术学报(英文版)2023，Vol.33Issue(11) ：1397-1410.DOI:10.1016/j.ijmst.2023.07.003
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  • NETL
  • NSTL
  • 维普
  • 万方数据

Study of a low-disturbance pressure-preserving corer and its coring performance in deep coal mining conditions

Wei Huang 1Jianan Li 2Zhiqiang Liu 3Mingqing Yang 2Zhenxi You 1Heping Xie4
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作者信息

  • 1. School of Mechanical Engineering,Sichuan University,Chengdu 610065,China
  • 2. College of Water Resource and Hydropower,Sichuan University,Chengdu 610065,China
  • 3. Jin Shi Drill Tech Co.,Ltd,Tangshan 063004,China
  • 4. College of Water Resource and Hydropower,Sichuan University,Chengdu 610065,China;Guangdong Provincial Key Laboratory of Deep Earth Sciences and Geothermal Energy Exploitation and Utilization,Institute of Deep Earth Sciences and Green Energy,College of Civil and Transportation Engineering,Shenzhen University,Shenzhen 518060,China
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Abstract

With the increasing depth of coal mining,the requirements for coring devices that maintain pressure are increasing.To adapt to the special environment in deep coal seams and improve the accuracy of testing gas content,a low-disturbance pressure-preserving corer was developed.The measurement of gas con-tent using this corer was analyzed.The coring test platform was used to complete a coring function test.A pressurized core with a diameter of 50 mm was obtained.The pressure was 0.15 MPa,which was equal to the pressure of the liquid column of the cored layer,indicating that the corer can be successfully used in a mud environment.Next,a pressure test of the corer was conducted.The results showed that under conditions of low pressure(8 MPa)and high pressure(25 MPa),the internal pressure of the corer remained stable for more than 1 h,indicating that the corer has good ability to maintain pressure.Therefore,the corer can be applied at deep coal mine sites.The results of this research can be used to promote the safe exploitation of deep coal mines and the exploitation of methane resources in coalbeds.

Key words

Pressure-preserving corer/Low-disturbance/Coring performance/Deep coal mining conditions

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基金项目

National Natural Science Foundation of China(51827901)

National Natural Science Foundation of China(52225403)

Program for Guangdong Introducing Innovative and Entrepreneurial Teams of China(2019ZT08G315)

Sichuan Science and Technology Program of China(2023NSFSC0780)

出版年

2023
矿业科学技术学报(英文版)
中国矿业大学

矿业科学技术学报(英文版)

CSTPCDCSCDEI
影响因子：1.222
ISSN：2095-2686
参考文献量17
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