Mining Engineering Commons^™

Spatial-Temporal Distribution Of Outburst Accidents From 2001 To 2020 In China And Suggestions For Prevention And Control, Zhang Chaolin, Wang Enyuan, Wang Yibo, Zhou Xifang

Coal Geology & Exploration

Spatial-temporal distribution of outburst accidents from 2001 to 2020 in China and suggestions for prevention and control

Water Inflow Forecasting Method Of Deep Buried Coal Working Face In Northern Ordos Basin, China, Yang Jian, Wang Hao, Liang Xiangyang, Huang Hao

Coal Geology & Exploration

Water inflow forecasting method of deep buried coal working face in northern Ordos Basin, China

Characteristics Analysis Of The Geothermal Water In Heshan Coalfield Based On Hydrogeochemistry, Zhao Guanhua

Coal Geology & Exploration

Characteristics analysis of the geothermal water in Heshan Coalfield based on hydrogeochemistry

Table Of Contents, The Editors

Coal Geology & Exploration

No abstract provided.

Fault Recognition Based On Principal Component Analysis And K-Nearest Neighbor Algorithm, Zou Guangui, Ren Ke, Ji Yin, Ding Jianyu, Zhang Shaomin

Coal Geology & Exploration

Fault recognition based on principal component analysis and k-nearest neighbor algorithm

Love Wave Full Waveform Inversion Via Pseudo-Hessian Gradient Pre-Conditioning Operator, Guan Jianbo, Li Yu, Yin Caiyun, Yang Zhi, Jin Chaobin, Zhao Meng, Yang Hang

Coal Geology & Exploration

Love wave full waveform inversion via Pseudo-Hessian gradient pre-conditioning operator

Research Status And Prospect Of Fault Activation Under Coal Mining Conditions, Tian Yutong, Zhang Pingsong, Wu Rongxin, Liu Chang

Coal Geology & Exploration

Research status and prospect of fault activation under coal mining conditions

Research On The Model Of Accurate Exploitation And Utilization Of Underground Space Resources In Closed/Abandoned Mines, Liu Qinjie, Wang Jinjiang, Yang Ke, Di Shengjun, Dong Zhiyong

Coal Geology & Exploration

Research on the model of accurate exploitation and utilization of underground space resources in closed/abandoned mines

Study On Exploitation And Utilization Mode Of Tourism Resources Of The Underground Space In Abandoned Mines, Han Yun, Liu Qinjie, Wu Benniu, Yang Ke, Dong Zhiyong

Coal Geology & Exploration

Study on exploitation and utilization mode of tourism resources of the underground space in abandoned mines

Key Problems And Countermeasures Of Cbm Development Through Surface Boreholes In Abandoned Coal Mines Of Shanxi Province, Wang Zheng, Li Guofu, Zhou Xianjun, Hu Shengyong, Li Rifu, Chen Wenke, Jiao Pengshuai, Li Chao, Li Jiangbiao

Coal Geology & Exploration

Key problems and countermeasures of CBM development through surface boreholes in abandoned coal mines of Shanxi Province

Coal Body Structure Identification By Logging Based On Coal Accumulation Environment Zoning And Its Application In Mabidong Block, Qinshui Basin, Zhang Jianguo, Han Sheng, Zhang Cong, Chen Yanjun

Coal Geology & Exploration

Coal body structure identification by logging based on coal accumulation environment zoning and its application in Mabidong Block, Qinshui Basin

Mechanism And Applicability Of Increasing Coalbed Methane Well Production By Pre-Positioned Acid Fracturing, Fan Yao

Coal Geology & Exploration

Mechanism and applicability of increasing coalbed methane well production by pre-positioned acid fracturing

Construction And Application Of "Eight In One" Closed-Loop Management And Control Mode Of Roof Water Disaster In Coal Mines, Liu Qingbao, Ding Xiang, Feng Jie, Zhang Kun

Coal Geology & Exploration

Construction and application of "eight in one" closed-loop management and control mode of roof water disaster in coal mines

Introductions And Applications Of A Self-Locking Wire-Line Coring System With A Water-Shielding Bit And A Circlip-Shielded Core Barrel, Liao Yuansu, Hu Qifeng

Coal Geology & Exploration

Introductions and applications of a self-locking wire-line coring system with a water-shielding bit and a circlip-shielded core barrel

Hazard Source Effect And Location Experiment Of Concealed Water Disaster In Coal Seam Floor, Li Panfeng

Coal Geology & Exploration

Hazard source effect and location experiment of concealed water disaster in coal seam floor

Prediction Of The Height Of Water Flowing Fractured Zone Based On Pso-Bp Neural Network, Lou Gaozhong, Tan Yi

Coal Geology & Exploration

Prediction of the height of water flowing fractured zone based on PSO-BP neural network

Hydraulic Connection Of Aquifers In Barapukuria Coal Mine, Bangladesh, Yu Bo, Wang Hao, Liu Feng, Liu Ji, Wang Qiangmin, Shang Hongbo

Coal Geology & Exploration

Hydraulic connection of aquifers in Barapukuria Coal Mine, Bangladesh

Regularity And Control Of Overburden And Surface Fractures In Shallow-Contiguous Seams, Cao Jian, Huang Qingxiang

Coal Geology & Exploration

Regularity and control of overburden and surface fractures in shallow-contiguous seams

Improvement Of Shear Strength And Anti-Disintegration Performance Of Compacted Loess, Zhu Yanbo, Li Hongfei, Ju Zhitong, Lan Hengxing, Liu Zhenqian, Han Yutao

Coal Geology & Exploration

Improvement of shear strength and anti-disintegration performance of compacted loess

Study On The Strength And Microstructure Of Loess Under Freeze-Thaw Based On Temperature Path, Long Jianhui, Zhang Lingling, Xing Xianli, Guo Xiaojuan

Coal Geology & Exploration

Study on the strength and microstructure of loess under freeze-thaw based on temperature path

Flow Characterization In Mine Ventilation Fan Blade Design Using Cfd, Anwar Endris Hassen

Journal of Sustainable Mining

In axial ventilation fans, the generation of a uniform flow velocity is desirable for better efficiency. To that end, different fan blade types have been developed to achieve better flow uniformity. This article aimed to characterize the flow distribution and its uniformity in four blade designs, namely constant chord, tapered blade, skewed blade, and tapered skewed blade, using Computational Fluid Dynamics (CFD). The study employs an iterative study where key study decisions are made as the study progresses. The study began with the selection of a blade profile for the study. A comparative study between the NACA seven-digit and four-digit …

Findings Report: Virtual Workshop On ‘Resilient Supply Of Critical Minerals’, Marek Locmelis, Angela D. Lueking, Michael S. Moats, Kwame Awuah-Offei, Lana Z. Alagha, Mark W. Fitch, Alanna Krolikowski, Shelby Clark

Geosciences and Geological and Petroleum Engineering Faculty Research & Creative Works

Executive Summary
On August 2-3, 2021, the Thomas J. O’Keefe Institute for Sustainable Supply of Strategic Minerals at Missouri University of Science and Technology (Missouri S&T) hosted the NSF-funded virtual workshop ‘Resilient Supply of Critical Minerals’. The workshop was convened via Zoom and attracted 158 registrants, including 108 registrants from academia (61 students), 30 registrants from government agencies, and 20 registrants from the private sector. Four topical sessions were covered:

A. Mineral Exploration and Source Diversification.
B. Supply Chain and Policy Issues.
C. Improving Mineral Recycling and Reprocessing Technologies.
D. Technological Alternatives to Critical Minerals.

Each topical session was composed …

Application Of Synthetic Aperture Radar Interferometry To Monitor Surface Deformations Of The Trans-European Transport Network (Ten-T) – A Case Study Of The Motorways Crossing Areas Of Mining Operations In The Upper Silesian Coal Basin, Poland, Adam Smoliński, Mariusz Stawinoga, Tomasz Pindel

Journal of Sustainable Mining

Underground hard coal mining causes surface deformations. When the mining operations are conducted beneath linear objects, such as motorways, there is a risk of deformations of the axis of the road and its horizontal and vertical alignment (additional bends and vertical curvatures, longitudinal inclinations, deformations of crosssections). In the areas subjected to mining operations, mining plants conduct geodetic monitoring. Due to their labour intensity and costs, geodetic measurements are usually made only a few times a year. The article discusses the possibility of applying Interferometric Synthetic Aperture Radar (InSAR) to monitor the subsidence of the vertical alignment of motorways caused …

Table Of Contents, The Editors

Coal Geology & Exploration

No abstract provided.

Research On Green Coal Mining Strategy In Hedong Coalfield Based On Resource And Geological Environment Characteristic, Liu Hanbin, Cheng Fangqin

Coal Geology & Exploration

Hedong Coalfield is located in the Loess Plateau of western Shanxi province at the western foot of the Lvliang Mountains in the middle reaches of the Yellow River. It is an important coking coal producing area, with severe soil erosion, fragile ecological environment, frequent occurrence of geological disasters and karst spring distribution in China. Through the analysis of resource and geological environment characteristics of Hedong Coalfield, it is found that the scarce coking coal reserves in Liliu mining area in the middle of the coalfield account for 70.8% of the total reserves. But its development intensity is higher than the …

Organic Geochemistry Of The Jurassic Tar-Rich Coal In Northern Shaanxi Province, Zhang Ning, Xu Yun, Qiao Junwei, Ning Shuzheng

Coal Geology & Exploration

The organic geochemical characteristics of tar-rich coal are of great significance to study the paleosedimentary environment and evolution of coal seams. Taking coal samples from 6 main coal seams of Yan’an Formation in Northern Shaanxi Province as the research object, this paper analyses the organic geochemical characteristics of coal seams by coal quality analysis and gas chromatography-mass spectrometry. The results showed that coal samples had a high abundance of chloroform asphalt "A" and a low saturated hydrocarbon/aromatic hydrocarbon ratios, characterized by the unimodal pattern of n-alkanes and dominated by medium chainsaturated hydrocarbons. The ratios of Pr/C₁₇, Ph/C_{18 …}

Occurrence Characteristics Of Carboniferous-Permian Tar-Rich Coal And Its Influencing Factors In Northern Shaanxi, Yao Zheng, Luo Qianzhou, Li Ning, Li Huabing, Wang Qiang, Gao Jun

Coal Geology & Exploration

The rational development of tar-rich coal is of great significance to promote clean and efficient utilization of coal, improve the independent guarantee ability of oil and gas, and achieve carbon emission peak and carbon neutrality. In order to find out the occurrence characteristics of tar-rich coal in the typical mining areas of Carboniferous-Permian coalfield in Northern Shaanxi, based on coal exploration data and sample test results, this paper compares the tar yield of mineable coal seams, summarizes the spatial-temporal distribution rules of tar-rich coal, and discusses the occurrence influential factors. The results show that the average tar yield of mineable …

Gas Drainage Borehole Completion Technology Of Directional Long Hole Drilling With Negative Angle, Ma Zan, Chen Dongdong, Xie Hengxing, Chen Tianzhu, Wang Bin, Jia Bingyi

Coal Geology & Exploration

Pre-drainage of coal seam gas with directional long boreholes is an effective technical means to achieve advanced control of coal mine gas area. Affected by mining deployment, negative-angle boreholes(downward holes) are widely used in production. Medium-hard coal seams have good porosity and usually do not require hole protection. However, the existing conventional methods can not effectively solve the problem of water accumulation in negative angle long boreholes. This paper takes the downward long boreholes in the No. 9 medium-hard coal seam of Longfeng Coal Mine in Guizhou as the research object. Two sets of directional long boreholes are constructed in …

The Concealed Small Faults Detection Based On Gas Drainage Boreholes Along And Cross The Coal Seam, Xue Honglai, Wen Zhe

Coal Geology & Exploration

The faults have great influence on coal and gas outburst disasters, and accurate detection of faults location is very important to prevent such disasters. At present, large number of gas drainage boreholes were drilled in coal mines, but the geological information contained in these boreholes is not fully paid attention to, thus the method to detect concealed faults by gas-drainage boreholes was proposed. In this paper, by establishing a mathematical model for fault detection based on gas drainage drilling, a three-dimensional coordinate of fault planes and coal seam floors is calculated, and basic parameters such as fault location, drop, attitude …

Quantitative Study Of 3d Numerical Simulation On Optimizing Borehole Layout Spacing Of Gas Drainage, Chen Yuexia, Chu Tingxiang, Chen Peng, Tang Yang

Coal Geology & Exploration

In order to optimize the spacing of boreholes and realize efficient drainage, based on the fluid solid coupling model, a three-dimensional geometric model was established to make it closer to the field reality, the gas drainage processes of a coal mine with different borehole spacing were simulated using COMSOL software. The results show that: the effective drainage area was visualized by the three-dimensional diagram of the isobaric surface with gas pressure of 0.74 MPa, and the influence of borehole spacing on the extraction efficiency was discussed. The results show that: the effective extraction radius is about 1.5 m during gas …