Secondary utilizations and perspectives of mined underground space

Xie, Heping; Zhao, Jian; Zhou, Hongwei; Ren, Shihua; Zhang, R.X.

doi:10.1016/j.tust.2019.103129

Cited by 67 publications

(29 citation statements)

References 22 publications

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“…Arrangement of measuring points: SWS-b1 to SWS-b5 are stress meters of the surrounding rock of the main tunnel (1) e surrounding rock stress is gradually reduced with the excavation progress of the main tunnel, showing that the tunnel excavation will cause the redistribution of surrounding rock and the stress relief of local layer. (2) As seen in the model test results, the stress of surrounding rock of the main tunnel increases and tends to be stable after the excavation of the crossed secondary tunnel. e stress of the second lining begins to regain stability, gradually increases after the excavation of the main tunnel, and finally tends to stabilize.…”

Section: Stress Analysis For the Surrounding Rockmentioning

confidence: 78%

“…Traffic congestion in large cities has become the norm. Transferring ground roads to underground projects is one of the effective ways to resolve the contradiction between the rapid increase in vehicle ownership and the difficult land expansion [1,2]. erefore, the development of rail transit and urban underground ring roads has become the primary choice for major cities to solve and improve urban transportation, to systematically solve the problem of urban spatial layout and the configuration of transportation network construction, and to fundamentally improve the current urban traffic conditions [3,4].…”

Section: Introductionmentioning

confidence: 99%

“…Disturbances will cause stress redistribution of surrounding rocks, which may easily cause safety accidents such as the decline or even destruction of the bearing capacity of structures, ground subsidence, and pipe network fractures [11][12][13]. (2) Due to the complex relationship between rail transit transfers and rail transit sections, the mutual influence is large, which makes the design and construction difficult [14,15]. erefore, the tunnel excavation technology must be researched in depth to solve the problems existing in the excavation of shallow-buried tunnels with very large cross sections to ensure the safe construction of urban rail transit [16,17].…”

Section: Introductionmentioning

confidence: 99%

See 2 more Smart Citations

Experimental Study on Structural Form and Excavation Model of Urban Metro Cross Transfer Station with Super Large Cross Section and Shallow Excavation

Lin

Chen

Yang

et al. 2020

Advances in Civil Engineering

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The construction of urban underground cross-interchange transfer subway stations often encounters the difficulties of shallow-buried, different surrounding rock, large spans and heights, congested road traffic, and surrounding buildings sensitive to the construction sequence. Therefore, there is a need for an underground project that controls the stability of underground space and ground subsidence. Based on the construction difficulties of a certain station (the maximum excavation area over 760 m2), this paper conducts a comprehensive selection design of the structure, construction mechanics response, and control technology of this type of interchange station structure and construction excavation. First of all, based on the design experience of large-scale underground transfer transportation engineering and taking full consideration of the stratum conditions, an “arch-wall” cross transfer structure method is proposed. The refined numerical analysis shows that the structure can fully utilize the stratum conditions to reduce the ground surface settlement. Then, in view of the stability of surrounding rock during the construction of a large section, based on the traditional large section excavation method, a construction method of “cross rock beam + heading method” was proposed. In order to verify the effect of the construction method, the three-dimensional detailed numerical model was used to simulate the construction conditions, and the mechanical response characteristics and displacement changes of surrounding rock under each excavation step are explored. Simultaneous interpreting with the traditional large section excavation method, the results show that the new method has advantages in controlling the stability of the surrounding rock. Meanwhile, in order to ensure the safe construction of the project, the self-developed multifunctional engineering test system for traffic tunnels is used to carry out a large-scale physical model experiment to simulate the entire process of the “arch-wall” cross transfer structure construction response characteristics. By analyzing the data of measuring points, the results show that the structure form and the excavation method cause the ground surface settlement, stress, and structural forces meet the requirements for safe construction. Finally, the station can be safely constructed under the new structure form and construction method. Therefore, the structure form and method proposed in this paper can be adapted to the large-scale underground structure under construction in complex environments.

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Section: Stress Analysis For the Surrounding Rockmentioning

confidence: 78%

Section: Introductionmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

See 1 more Smart Citation

Experimental Study on Structural Form and Excavation Model of Urban Metro Cross Transfer Station with Super Large Cross Section and Shallow Excavation

Lin

Chen

Yang

et al. 2020

Advances in Civil Engineering

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show abstract

“…Importantly, a classification performed on the basis of some defined factors should allow for the intended final function of the post-industrial facilities. In particular, the functions of post-mining facilities should not only be restricted to those related to the geographic and tourist contexts, but should also be viewed more widely, e.g., in the context of thermal energy generation [38] and its underground storage [39], as well as pumpedstorage power stations using empty post-mining underground spaces [40]. The concept of "green infrastructure" can contribute to the sustainable development of post-mining areas [41].…”

Section: Post-industrial Facilities As a Resource-reviewmentioning

confidence: 99%

Sustainable Social and Environmental Evaluation of Post-Industrial Facilities in a Closed Loop Perspective in Coal-Mining Areas in Poland

2020

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The article discusses issues related to the circular economy ideas applied to post-industrial facilities and infrastructure in Polish coal-mining areas. The aim of the article is to indicate directions for sustainability-oriented actions on reusing the remnants of closed mining plants and reshaping the areas which will be transformed under the just transition principles. For this purpose, the article reviews the terminology related to inventories of such facilities and their classification, and also indicates some locations of such facilities. The authors discuss the problem of legal regulations related to the process of closing a mining plant in Poland and also to EU guidelines on the allocation of financial resources from the Just Transition Fund (addressing the EU coal industry, climate change and the potential for clean energy solutions). This research aims at reviewing current research on the above aspects and at raising the problem of managing post-industrial facilities in light of their discontinued function due to mine closure. The article offers a preliminary diagnosis of the scale of research required to investigate the above problems in the view of the expected coal-exit in the Polish economy.

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“…Within the framework of clean energy production and ecological restoration of the post-mining areas, considerable efforts have been made worldwide on utilizing geothermal energy, water, and spaces in abandoned coal mines. For example, some scholars have suggested constructing underground reservoirs of abandoned coal mines (Bian et al 2021;Gu et al 2015), developing geothermal resources (Pu et al 2021;Jardon et al 2013), and building pumped storage power stations (Fan et al 2020;Xie et al 2020).…”

Section: Introductionmentioning

confidence: 99%

Energy Evolution and Water Immersion-Induced Weakening Mechanism in the Sandstone Roof of Coal Mines

Liu

Yang

Zhang

et al. 2021

Preprint

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The instability of underground spaces in abandoned coal mines with water-immersed rocks is one of the main hazards hindering the geothermal energy utilization and ecological restoration of post-mining areas. This study conducted graded cyclic loading-unloading tests of five groups of sandstone samples with different water contents. The evolution laws of input, elastic, dissipated, damping, and plastic energies were explored in detail, taking into account the damping effect. The normalized plastic energy was used to characterize the damage evolution of sandstone samples, which failure modes were analyzed from both macroscopic and microscopic perspectives. The X-ray diffraction technique and scanning electron microscopy were used to reveal the softening mechanism of sandstone's strength and elastic energy storage limit. The results showed that the graded cyclic loading's input, elastic, and dissipated energies increased gradually. The elastic energy share first increased and then stabilized, while dissipated energy share variation had the opposite trend. In each cycle, the input energy was primarily stored in the form of elastic energy, while the dissipated energy was mainly used to overcome the damping of sandstone. When the normalized number of cycles approached unity, the plastic energy share sharply increased, while that of the dampening energy featured an abrupt drop. Such change indicated an inevitable instability failure of the water-bearing sandstone. As the water content increased, the pore water exhibited more substantial lubrication, water-wedging, and dissolution effects on mineral particles. As a result, the latter obtained a round form, and the elastic energy storage limit of the sandstone decreased. When the water content was increased, the damage factor of sandstone after the same number of cycles increased at a relatively higher rate, and there was a transition of failure mode from brittle to ductile.

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Secondary utilizations and perspectives of mined underground space

Cited by 67 publications

References 22 publications

Experimental Study on Structural Form and Excavation Model of Urban Metro Cross Transfer Station with Super Large Cross Section and Shallow Excavation

Experimental Study on Structural Form and Excavation Model of Urban Metro Cross Transfer Station with Super Large Cross Section and Shallow Excavation

Sustainable Social and Environmental Evaluation of Post-Industrial Facilities in a Closed Loop Perspective in Coal-Mining Areas in Poland

Energy Evolution and Water Immersion-Induced Weakening Mechanism in the Sandstone Roof of Coal Mines

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