为了解决深部矿产资源开采所面临的高温问题,降低深部地热开采成本,以基于开挖的增强型地热系统(Enhanced Geothermal Systems Based on Excavation Technology,EGS-E)为基础,提出了一种矿产与地热资源协同开采模式。该模式以围岩温度...为了解决深部矿产资源开采所面临的高温问题,降低深部地热开采成本,以基于开挖的增强型地热系统(Enhanced Geothermal Systems Based on Excavation Technology,EGS-E)为基础,提出了一种矿产与地热资源协同开采模式。该模式以围岩温度为标尺,将地质资源类型分为低温资源(50℃以下)、中温资源(50~100℃)和高温资源(100℃以上),对应的开采模式分别为低温矿产开采模式,中温“热矿共采”模式和高温地热开采模式。低温资源采用传统的矿产开采模式,以矿产资源开采为主。中温资源采用先采热后采矿的热矿共采模式,在对中温型地热资源进行利用的同时,可增加可采矿产资源储量。高温资源采用基于开挖的增强型地热系统(EGS-E),采用独特的热储致裂和热能交换技术实现地热资源大规模开采。研究表明:热矿协同开采模式将传统采矿技术与增强型地热系统相结合,既能消除中高温区域的热害影响,保证矿产资源安全开采,又能实现中温区域地热资源利用以及高温区域地热资源大规模开采;该模式以中高温地热资源的开采弥补矿产资源开采因温度升高引起的成本激增,同时以低温区域矿产资源开采缓解深部地热资源开发的巨额投资压力,为深部矿产和地热资源安全高效开发提供了一种新的方案。展开更多
To gain an understanding of gas occurrence, distribution is the fundamental basis for preventing gas disasters. Presently, how tectonic structures control gas occurrence remains problematic. This study proposes the th...To gain an understanding of gas occurrence, distribution is the fundamental basis for preventing gas disasters. Presently, how tectonic structures control gas occurrence remains problematic. This study proposes the theory and elucidates the mechanism of stepwise tectonic control on gas occurrence according to the characteristics of gas occurrence and the patterns of gas distribution in coal mines in North China. On the one hand, tectonic compression and shearing lead to stress concentration and thus deform the coal and reduce the coal seam permeability, further contributing to gas preservation. On the other hand, tectonic extension and rifting lead to stress release and thus improve the coal seam permeability, further contributing to gas emission. Therefore, the distribution zones of tectonic compression, ubiquitous coal deformation, and gas accumulation have been step-wisely revealed, and the coal-gas outburst proneness zones are finally identified. The proposed theory of step-wise tectonic control on gas occurrence is of practical significance for gas prediction and control.展开更多
对隧道工程中的地质灾害进行总结,通过对真实破裂过程分析方法(realistic failure process analysis,RFPA)在隧道工程模拟中的相应应用进行综述,得到以下主要结论:在隧道工程施工中,隧道工程的主要地质灾害包括固体地质灾害、准流体地...对隧道工程中的地质灾害进行总结,通过对真实破裂过程分析方法(realistic failure process analysis,RFPA)在隧道工程模拟中的相应应用进行综述,得到以下主要结论:在隧道工程施工中,隧道工程的主要地质灾害包括固体地质灾害、准流体地质灾害和流体地质灾害3大类;RFPA数值计算方法在与隧道工程施工相关的岩石力学及破坏特性获取、开挖条件下的隧道破坏模拟、层理岩体隧道开挖模拟、动力条件下隧道破坏模拟、深部围岩分区破裂模拟以及渗流作用下隧道稳定性分析等方面都得到了广泛的应用;目前,RFPA数值计算方法已经在计算精度、计算规模、计算速度、大规模求解过程的并行计算和数值计算云平台建设等方面取得了重大进展。随着技术进步和程序开发的不断深入,RFPA数值计算方法会在隧道工程模拟方面取得更为广泛的应用。展开更多
文摘为了解决深部矿产资源开采所面临的高温问题,降低深部地热开采成本,以基于开挖的增强型地热系统(Enhanced Geothermal Systems Based on Excavation Technology,EGS-E)为基础,提出了一种矿产与地热资源协同开采模式。该模式以围岩温度为标尺,将地质资源类型分为低温资源(50℃以下)、中温资源(50~100℃)和高温资源(100℃以上),对应的开采模式分别为低温矿产开采模式,中温“热矿共采”模式和高温地热开采模式。低温资源采用传统的矿产开采模式,以矿产资源开采为主。中温资源采用先采热后采矿的热矿共采模式,在对中温型地热资源进行利用的同时,可增加可采矿产资源储量。高温资源采用基于开挖的增强型地热系统(EGS-E),采用独特的热储致裂和热能交换技术实现地热资源大规模开采。研究表明:热矿协同开采模式将传统采矿技术与增强型地热系统相结合,既能消除中高温区域的热害影响,保证矿产资源安全开采,又能实现中温区域地热资源利用以及高温区域地热资源大规模开采;该模式以中高温地热资源的开采弥补矿产资源开采因温度升高引起的成本激增,同时以低温区域矿产资源开采缓解深部地热资源开发的巨额投资压力,为深部矿产和地热资源安全高效开发提供了一种新的方案。
基金financially supported by the Major Project of National Science and Technology of China(No.2011ZX05040-005)the Key Program of National Natural Science Foundation of China(No.51234005)+1 种基金the National Natural Science Foundation of China(No.41102094)the Changjiang Scholars and Innovative Research Team in University of China(No.IRT1235)
文摘To gain an understanding of gas occurrence, distribution is the fundamental basis for preventing gas disasters. Presently, how tectonic structures control gas occurrence remains problematic. This study proposes the theory and elucidates the mechanism of stepwise tectonic control on gas occurrence according to the characteristics of gas occurrence and the patterns of gas distribution in coal mines in North China. On the one hand, tectonic compression and shearing lead to stress concentration and thus deform the coal and reduce the coal seam permeability, further contributing to gas preservation. On the other hand, tectonic extension and rifting lead to stress release and thus improve the coal seam permeability, further contributing to gas emission. Therefore, the distribution zones of tectonic compression, ubiquitous coal deformation, and gas accumulation have been step-wisely revealed, and the coal-gas outburst proneness zones are finally identified. The proposed theory of step-wise tectonic control on gas occurrence is of practical significance for gas prediction and control.
文摘对隧道工程中的地质灾害进行总结,通过对真实破裂过程分析方法(realistic failure process analysis,RFPA)在隧道工程模拟中的相应应用进行综述,得到以下主要结论:在隧道工程施工中,隧道工程的主要地质灾害包括固体地质灾害、准流体地质灾害和流体地质灾害3大类;RFPA数值计算方法在与隧道工程施工相关的岩石力学及破坏特性获取、开挖条件下的隧道破坏模拟、层理岩体隧道开挖模拟、动力条件下隧道破坏模拟、深部围岩分区破裂模拟以及渗流作用下隧道稳定性分析等方面都得到了广泛的应用;目前,RFPA数值计算方法已经在计算精度、计算规模、计算速度、大规模求解过程的并行计算和数值计算云平台建设等方面取得了重大进展。随着技术进步和程序开发的不断深入,RFPA数值计算方法会在隧道工程模拟方面取得更为广泛的应用。