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research progress and application of deep in-situ condition preserved coring and testing

International Journal of mining Science and Technology 2023年第11期33卷 1319-1337页

作者： Heping Xie Yunqi Hu Mingzhong Gao Ling Chen Ru Zhang Tao Liu Feng Gao Hongwei Zhou Xiaobo Peng Xiongjun Li Jianbo Zhu Cunbao Li Ruidong Peng Yanan Gao Cong Li Jianan Li Zhiqiang He State Key Laboratory of Intelligent Construction and Healthy Operation and Maintenance of deep underground Engineering College of Water Resource and HydropowerSichuan UniversityChengdu 610065China State Key Laboratory of Intelligent Construction and Health Operation and Maintenance of deep Earth Engineering Guangdong Provincial Key Laboratory of Deep Earth Sciences and Geothermal Energy Exploitation and UtilizationInstitute of Deep Earth Sciences and Green EnergyCollege of Civil and Transportation EngineeringShenzhen UniversityShenzhen 518060China School of Mechanical Engineering Sichuan UniversityChengdu 610065China Institute of New Energy and Low-Carbon Technology Sichuan UniversityChengdu 610065China frontier Science research Center for fluidized mining of deep underground resources China University of Mining and TechnologyXuzhou 221116China State Key Laboratory of Coal resources and Safe mining China University of Mining and Technology-BeijingBeijing 100083China

With the depletion of shallow resources,the exploration of deep earth resources has become a global *** study of the different patterns in the physical mechanical properties of rocks at different occurrence depths is the basis for exploring deep into the earth,with the core and premise being the acquisition and testing of deep in-situ core *** on the original idea of deep in-situ condition preserved coring(ICP-Coring)and testing,combined with theoretical modeling,numerical analysis,test platform development,indoor testing and engineering application,the principles and technologies of deep ICP-Coring are *** principle and technology consists of five parts:in-situ pressurepreserved coring(IPP-Coring),in-situ substance-preserved coring(ISP-Coring),in-situ temperaturepreserved coring(ITP-Coring),in-situ light-preserved coring(ILP-Coring),and in-situ moisturepreserved coring(IMP-Coring).The theory and technology of temperature and pressure reconstruction at different occurrence depths and in different environments are proposed,and prototype trial production was completed by following the principle of displacement and tests based on the in-situ reconstructed *** notable advances are as follows:(1)deep in-situ coring system:A pressure-preserved controller with an ultimate bearing capacity greater than 140 MPa,highperformance(temperature-resistant,pressure-resistant,and low thermally conductive)temperaturepreserved materials,an active temperature control system,and high-barrier quality-preserved membrane materials were developed;a deep ICP-Coring capacity calibration platform was independently developed,a deep in-situ coring technology system was developed,and the acquisition of deep in-situ cores was realized.(2)In-situ storage displacement system:Following the dual-circuit hydraulic design idea,a single-drive source push-pull composite grabbing mechanism was designed;the design of the overall structure for the deep in-situ displ

关键词： deep mining deep in-situ Coring Displacement Test

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Theoretical and technological exploration of deep in situ fluidized coal mining

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frontiers in Energy 2019年第4期13卷 603-611页

作者： Heping XIE Yang JU Shihua REN Feng GAO Jianzhong LIU Yan ZHU Institute of deep underground Science and Green Energy Shenzhen UniversityShenzhen 518060China Institute of Clean Energy Shenzhen 518060China Sichuan University Chengdu 610065China State Key Laboratory of Coal resources and Safe mining China University of Mining and Technology(Beijing)Beijing 100083China frontier scientific research centre for Fluidlized mining of deep underground resources China University of Mining and TechnologyXuzhou 221006China China Coal research Institute Beijing 100013China State Key Laboratory for Geomechanics and deep underground Engineering China University of Mining and TechnologyXuzhou 221006China China Coal Technology and Engineering Group Co. Ltd.Beijing 100013China School of Mechanics and Civil Engineering China University of Mining and Technology(Beijing)Beijing 100083China

mining industries worldwide have inevitably resorted to exploiting resources from the deep ***,traditional mining methods can cause various problems,e.g.,considerable mining difficulty,environmental degradations,and frequent disastrous *** exploit deep resources in the future,the concept of mining must be reconsidered and innovative new theories,methods,and technologies must be *** effectively acquire coal resources deeper than 2000 m,new theoretical and technological concepts about deep in situ fluidized mining are *** limits of mining depth need to be broken to acquire deep-coal resources in an environmentally friendly,safe,and efficient *** is characterized by‘There are no coal on the ground and no men in the coal mine’.First,this paper systematically explains deep in situ fluidized coal ***,it presents a new theoretical concept,including the theories of mining-induced rock mechanics,three-field visualization,multi-physics coupling for in situ transformation,and in situ mining,transformation and *** also presents key technological concepts,including those of intelligent,unmanned,and fluidized ***,this paper presents a strategic roadmap for deep in situ fluidized coal *** summary,this paper develops new theoretical and technological systems for accomplishing groundbreaking innovations in mining technologies of coal resources in the deep underground.

关键词： coal resource deep in situ fluidized mining theoretical system key technologies strategic roadmap

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fluidized mining and in-situ transformation of deep underground coal resources: a novel approach to ensuring safe, environmentally friendly, low-carbon, and clean utilisation

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International Journal of Coal Science & Technology 2019年第2期6卷 184-196页

作者： Yang Ju Yan Zhu Heping Xie Xiaodong Nie Yong Zhang Chang Lu Feng Gao State Key Laboratory of Coal resources and Safe mining China University of Mining & Technology Beijing D11 Xueyuan Road Beijing 100083 China frontier scientific research centre for fluidized mining of deep underground resources China University of Mining & Technology 1 University Ave Xuzhou 221006 China School of Mechanics and Civil Engineering China University of Mining & Technology Beijing D11 Xueyuan RD Beijing 100083 China Institute of deep Earth Science and Green Energy Shenzhen University Shenzhen 518060 China School of Energy and mining Engineering China University of Mining & Technology Beijing D11 Xueyuan RD Beijing 100083China

Traditional coal mining and utilisation patterns are severely detrimental to natural resources and environments and significantly impede safe, low-carbon, clean, and sustainable utilisation of coal resources. Based on the idea of in situ fluidized coal mining that aims to transform solid coal into liquid or gas and transports the fluidized resources to the ground to ensure safe mining and low-carbon and clean utilisation, in this study, we report on a novel in situ unmanned automatic mining method. This includes a flexible, earthworm-like unmanned automatic mining machine (UAMM) and a coal mine layout for in situ fluidized coal mining suitable for the UAMM. The technological and economic advantages and the carbon emission reduction of the UAMM-based in situ fluidized mining in contrast to traditional mining technologies are evaluated as well. The development trends and possible challenges to this design are also discussed. It is estimated that the proposed method costs approximately 49% of traditional coal mining costs. The UAMM-based in situ fluidized mining and transformation method will reduce CO2 emissions by at least 94.9% compared to traditional coal mining and utilisation methods. The proposed approach is expected to achieve safe and environmentally friendly coal mining as well as lowcarbon and clean utilisation of coal.

关键词： In-situ fluidized mining Unmanned automatic mining machine Mine layout Coal resources Low-carbon Environmental protection

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research on in-situ condition preserved coring and testing systems

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Petroleum Science 2021年第6期18卷 1840-1859页

作者： He-Ping Xie Tao Liu Ming-Zhong Gao Ling Chen Hong-Wei Zhou Yang Ju Feng Gao Xiao-Bo Peng Xiong-Jun Li Rui-Dong Peng Ya-Nan Gao Cong Li Zhi-Qiang He Ming-Qing Yang Zhi-Yu Zhao Guangdong Provincial Key Laboratory of deep Earth Sciences and Geothermal Energy Exploitation and Utilization Institute of Deep Earth Sciences and Green EnergyCollege of Civil and Transportation EngineeringShenzhen UniversityShenzhen518060GuangdongChina Shenzhen Key Laboratory of deep underground Engineering Sciences and Green Energy Shenzhen UniversityShenzhen518060GuangdongChina MOE Key Laboratory of deep Earth Science and Engineering College of Water Resource and HydropowerSichuan UniversityChengdu 610065SichuanChina School of Mechanical Engineering Sichuan UniversityChengdu610065SichuanChina Institute of New Energy and Low-Carbon Technology Sichuan UniversityChengdu610065SichuanChina State Key Laboratory of Coal resources and Safe mining China University of Mining and Technology(Beijing)Beijing100083China frontier Science research Center for fluidized mining of deep underground resources China University of Mining and TechnologyXuzhou221116JiangsuChina

As shallow resources are increasingly depleted,the mechanics'theory and testing technology of deep insitu rock has become *** coring technologies obtain rock samples without retaining the in-situ environmental conditions,leading to distortion of the measured ***,a coring and testing systems retaining in-situ geological conditions is presented:the coring system that obtains in-situ rock samples,and the transfer and testing system that stores and analyzes the rocks under a reconstructed *** ICP-Coring system mainly consists of the pressure controller,active insulated core reactor and insulation layer and sealing *** ultimate bearing strength of 100 MPa for pressurepreservation,temperature control accuracy of 0.97%for temperature-retained are ***_(4)and CO permeability of the optimized sealing film are as low as 3.85 and 0.33 ppm/*** average tensile elongation of the film is 152.4%and the light transmittance is reduced to 0%.Additionally,the pressure and steady-state temperature accuracy for reconstructing the in-situ environment of transfer and storage system up to 1%and±0.2 is *** error recorded of the noncontact sensor ring made of lowdensity polymer is less than 6%than that of the contact *** system can provide technical support for the deep in-situ rock mechanics research,improving deep resource acquisition capabilities and further clarifying deep-earth processes.

关键词： deep mining In-situ environmental conditions In-situ condition preserved coring and testing In-situ transfer deep-earth processes ICP-Coring In-situ condition-preserved coring

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