for the exploitation of coal and CBM as the input conditions for decision-making, optimal combined spatiotemporal schemes for the coordinated exploi-tation of coal and CBM in the coal mining faces of each mine were obtained. These schemes can be used to guide subsequent eorts for the coordinated exploitation of coal and CBM in coal mining faces
A method for classifying eco-geological environment types based on coal resource exploitation solves the problem in the prior art of a lack of combined consideration of different geological and ecological environments on the surface in a to-be-mined area before coal mining.
Abstract Coal seam mining causes movement and deformation of the overlying rock mass and ground surface, directly resulting in serious damage to the surface construction facilities. To investigate the deformation mechanism and characteristics of the overlying rock mass, three-dimensional numerical simulation and model test are carried …
theory, a method of multisource information fusion, the proposed model combined the results of different forecasting approaches, including conventional techniques and an emerging method ... Energy Exploration & Exploitation 2020, Vol. 38(5) 1320–1348! The Author(s) 2020 ... called index methods, directly contact the coal mass to measure …
Although numerous studies regarding the risk a ssessment methods of coal and gas outburst have been conducted, the assessment methods and mathe matical models proposed remain restricted. First, the weighting method is relativel y simple, which renders it difficult to consider both subjectivity and objectivity.
Coal exploration encompasses a broad range of activities aimed at finding coal-bearing sediments and deposits that can be exploited [].The process relies on a variety of geological techniques to determine the location and quality of coal, estimate resources, and identify geological factors that will facilitate or constrain coal exploitation and …
Validation was carried out based on the knowledge of existing coal seam locations, exploitation sites, coal outcrop areas and ancillary data such as the mineral map, geological map, historical information of the area, including past field campaign information and site visit. NDVI, lineament and temperature maps were also produced.
This paper uses a neural architecture search (NAS) algorithm based on Bayesian optimization (BO), a version of neural architecture search adapted for network morphism, is proposed to automatically seek an optimized cell-based architecture approximation for CNN to classify the coal and gangue. Besides, we defined the cell-based search space, …
Fig. 21 Six typical coal seam crossing methods, modified from Zhao (2017) Fig. 22 Trajectory tracking methods in the presence of faults, modified from Zhao ( 2017 )
The triggering factors of coal and gas outburst disasters are complex and influenced by the coupling of gas, in situ stress, and mechanical properties of coal (Wang et al., 2022, Xue et al., 2020; Zhou et al., 2020a).At the early stage of mining, the basic parameters that are easy to test and directly related to the outburst risk are usually …
Wang et al. [36], [37] proposed a coal recognition method (C-SVM) based on SVM and coal spectral characteristics. Their results prove that the C-SVM is stronger than the traditional coal classification method. Random forest (RF) is a combined learning method [24]. RF is an improved method of decision tree, it utilizes the bootstrap …
Coalbed methane (CBM) drilling and completion technologies (DCTs) are significant basis for achieving efficient CBM exploration and exploitation. Characteristics …
Simultaneous extraction of the coal and gas is an effective method of eliminating coal mine gas disasters while safely exploiting the coal and achieving …
The process relies on a variety of geological techniques to determine the location and quality of coal, estimate resources, and identify geological factors that will …
Due to the characteristics of serious coal-rock fragmentation, large roof deformation, and integration of top coal and side coal. Therefore, the combined support method of "high prestressed long ...
The quantitative identification of the coal texture is of great importance as a crucial parameter for coalbed methane (CBM) reservoir evaluation. This study combined drilling core data, electrical imaging logging data, and four conventional logging data, namely, compensation density (DEN), natural γ (GR), deep lateral resistivity (RD), and …
The thermal utilization of low-rank coal with high sodium content easily leads to severe fouling and slagging in actual boilers. To alleviate this problem, a combined method of thermal pre-activation and intercalation-exfoliation was developed in order to modify the kaolinite and thus control the release of sodium vapor during the combustion …
The mechanism of coal and gas outburst disasters is perplexing, and the evaluation methods of outburst disasters based on various sensitive indicators often have some imprecision and fuzziness.
The evaluation and intelligent deployment method established in this study could improve the existing evaluation method for coal and CBM coupling coordinated exploitation, which helps to understand the level of coupling coordination for coal mines …
5 Figure 1 gives a flow chart of the emission processes from oil, gas, and coal exploitation as resolved in our inventory. The emissions characterized here correspond to the IPCC (2006) category "fugitive emissions from fuels" (category code 1B). Here and elsewhere we refer to "sectors" as oil, gas, or coal.
Che-Min Cheng presents a mechanical-thermal combined recovery method, utilizing the heat of seawater, convective heat transfer, and pipe transportation, considering the stratum safety similar to ...
1.1. Environmental impacts associated with coal mining methods. Coal mining can be done by two methods, open-pit and underground, where each one has a list of environmental impacts. First, open-pit mining involves digging for coal near the ground surface. Open-pit mining destroys trees, plants, soil, forests, and wildlife habitats.
Large city-scale coal-fired combined heat and power (CHP) plants are one of the main contributors to greenhouse gas emissions. The motivation is to find a way to decrease the contributions in the most feasible way possible. The importance of this study is that it presents a methodology for comparing scenarios from both environmental and …
This study aimed to investigate the internal dislocation law of coal seam working face under coal pillars with different widths and evaluate the safety of using the combined mining of close-distance coal seams under different layer spacing. Based on elastic–plastic mechanics and mine pressure theory, theoretical calculation and …
The coal used were Tiebei coal (TB coal), Zhundong coal (ZD coal) and Yimin lignite (YM coal). Their elemental analysis and industrial analysis were obtained by vario MACRO cube Elemental analyzer and SANDE proximate analyzer, as shown in Table 1. The analytical pure K 2 CO 3 and KOH were purchased from Sinopharm Chemical …
In order to avoid the destruction of underground aquifers in the eco-environment frangible area caused by the exploitation of coal resources, a new coal mining method with near-zero impact on aquifers (MNIA) was proposed according to the advantages of strip mining and backfill mining methods to effectively control …
Pressure-relieved coal mining method has been successfully carried out in many mines in China, especially in high gassy mines. The motivation for the paper is to help engineers fill the knowledge gap on how to evaluate how the permeability changes and effect on improving low permeability prior to its construction. A new method is proposed …
The Chenbaerhuqi coal field in Hulunbuir City, Inner Mongolia Autonomous Region of China, is where the Baorixile open-pit coal mine is situated (as shown in Fig. 2) 7,28.The mine's external ...
DOI: 10.1061/(asce)ey.1943-7897.0000809 Corpus ID: 244584162; Geothermal Energy Exploitation and Power Generation via a Single Vertical Well Combined with Hydraulic Fracturing @article{Cui2022GeothermalEE, title={Geothermal Energy Exploitation and Power Generation via a Single Vertical Well Combined with …
Influence of the extra-thick coal seam exploitation on the deformation characteristics of the overlying rock mass in an open-pit mine slope ... Coal mining method is one time full height mining technology, and roof management method is all caving method. ... Grossman PA, Rubinstein JH, Thomas DA. 2018. Combined optimisation of …
Modeling of Gas Desorption and DiffusionKinetics in a Coal Seam Combined with a Free Gas Density Gradient Concept Yueping Qin, Hao Xu, Daoyong Yang,* Yu Sun,* Mingyan Guo, Fengjie Zhang, Fan Wu ...
Coalbed methane (CBM) drilling and completion technologies (DCTs) are significant basis for achieving efficient CBM exploration and exploitation. Characteristics of CBM reservoirs vary in different regions around the world, thereby, it is crucial to develop, select and apply the optimum DCTs for each different CBM reservoir. This paper firstly …
Considering the coal structural system, the task of this study was to investigate the structural spreading of the coal mass in the target area using a multi-attribute 3D seismic fusion method.
open access. Abstract. Sustainable mining practices is a concept that embeds the principles of sustainable development into the whole mine life-cycle, from …
