Journal Details

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2020

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Brief

Coal Geology & Exploration is one of the most influential scientific and technical journal issued at home and abroad, featuring both academic research and practical technology. It is committed to report scientific research achievements, academic papers, new technologies, methods and experience with high academic level and practical value in coal geology industry. The main columns involve coal geology, mining geology, coalbed methane, shale gas, hydrogeology and engineering geology, environmental geology, coalfield geophysical prospecting, exploration engineering and general message. The journal is published in both paper and electronic forms and it caters to scientific researchers, engineering and technical personnel as well as teachers and students in colleges and universities for communication and exchange of latest and innovative achievements on green, safety and efficient mining.
Editorial Board

Editor in Chief: JIN Xianglan

Development and application of lightweight underground drill rig

FAN Dong;WANG Ruize;TIAN Hongliang;CHANG Jianghua

Coal Geology & Exploration,2020,Vol 48,No. 04

Integrated monitoring technology of water inrush from coal seam floor and its application

DUAN Jianhua

Coal Geology & Exploration,2020,Vol 48,No. 04

Karst water damage in floor is common in North-China-type coalfield. Because of its concealment and emergency, the prevention and control of water is faced with huge challenges, and monitoring and early-warning technology of floor water inrush has become a necessary measure in the process of the safe production in coal mines. The formation and occurrence of floor water disasters have a process of evolution from conception to development and then to occurrence. In this process, the corresponding water inrush symptoms will be released in different stages of the floor fracture and apparent resistivity of the rock layer. Timely, accurate and effective collection of information can give the specific hydrogeological characteristics in the process of water inrush. It laid a foundation for the establishment of water inrush monitoring system. According to the three elements of water inrush, an integrated monitoring system of water inrush from the floor is built in the working face 11916 of the east mine of Gequan Coal Mine by well–ground–borehole microseismic monitoring and apparent resistivity monitoring. Real-time monitoring of water channels and water sources are carried out to provide a scientific basis for the prediction of water inrush from the floor. The monitoring results show that under normal conditions, the depth of floor damage to working face 11916 is 20–25 m. However, when the working face advanced to the middle roadway on September 14, 2019, the superposed pressure of the material haulage roadway and the middle roadway resulted in the increase in the floor failure depth at this location, reaching 30–35 m. Benxi limestone water from the floor entered the material haulage roadway through the water diversion channel, and the water output from the floor of the working face is 2 m 3/h. In addition, from the monitoring results of apparent resistivity, we can see the development of a low resistivity anomaly from the bottom to the top. Research shows that the integrated monitoring system of water inrush from the floor, constructed by well–ground–borehole microseismic monitoring and apparent resistivity monitoring, can capture the symptoms of water inrush from the floor. It is of great significance and practical value to predicting serious water disasters.

Summary of water hazard characteristics and water prevention and control technology in open-pit coal mines in China

HUANG Xuanming;ZHANG Yan;LI Wensong;TIAN Zenglin

Coal Geology & Exploration,2020,Vol 48,No. 04

Model and selection criterion of zonal preact grouting to prevent mine water disasters of coal floor limestone aquifer in North China type coalfield

DONG Shuning;GUO Xiaoming;LIU Qisheng;WANG Hao;NAN Shenghui;ZHENG Shitian;WANG Yuhang

Coal Geology & Exploration,2020,Vol 48,No. 04

Construction technology of vertical concealed laying of anti-seepage membrane for water cutoff curtain in the open-pit coal mine

LI Wensong;DANG Yakun;ZHU Mingcheng;GAO Ya

Coal Geology & Exploration,2020,Vol 48,No. 04