Results 61 to 70 of about 291 (154)

Application of long-distance tunneling and detection for advance detection in excavation using shield tunneling machines

Meitian dizhi yu kantan
Objective and MethodDuring the rapid excavation process using shield tunneling machines in coal mines, the advance detection of concealed geological anomalies encounters challenges of limited space and insufficient accuracy.
Chao CHEN, Ping LI, Wei LI, Rong WEI
doaj   +1 more source

High-resolution transient electromagnetic inversion method based on regression tree and gramian constraint

Frontiers in Earth Science
The conventional one-dimensional (1D) inversion of transient electromagnetic method (TEM) data is widely used for subsurface resistivity imaging; however, its vertical resolution is often limited by electromagnetic diffusion and inversion non-uniqueness,
Qiping Jiang, Weihua Yao, Ping Li, Ping Li, Xueyang Sun, Chao Su   +5 more
doaj   +1 more source

Key technologies for artificial intelligence-based inversion of the borehole transient electromagnetic method in coal mining areas

Meitian dizhi yu kantan
BackgroundUsing directional boreholes, the borehole transient electromagnetic (TEM) method enables near-field excitation and the simultaneous reception of three components within a borehole.
Tao FAN, Yue HAO, Peng ZHANG, Ping LI, Zhao ZHAO, Rui ZHAO, Qiang LIU, Junsheng YAN, Xianzhe SONG, Borui LIU, Changyuan CHEN, Bo LI   +11 more
doaj   +1 more source

Three-Dimensional Borehole–Surface TEM Forward Modeling with a Time-Parallel Method

Applied Sciences
The three-dimensional borehole-to-surface transient electromagnetic (BSTEM) method plays a critical role in resolving subsurface conductivity structures under complex geological conditions.
Sihao Wang, Hui Cao, Ruolong Ma
doaj   +1 more source

Forward Modeling Analysis in Advanced Exploration of Cross-Hole Grounded-Wire-Source Transient Electromagnetic Method

Applied Sciences
To address the challenge of accurately detecting hidden water inrush hazards ahead of working faces, a cross-hole transient electromagnetic (TEM) method utilizing a grounded-wire source is proposed.
Jiao Zhu, Zhihai Jiang, Maofei Li, Zhonghao Dou, Zhaofeng Gao   +4 more
doaj   +1 more source

Advances in research and future prospects of borehole geophysical prospecting technology for coal mines

Meitian dizhi yu kantan
Background Borehole geophysical prospecting technology for coal mines integrates the advantages of both drilling and geophysical prospecting. Accordingly, multiple critical advances have been achieved in its applications to the technologies and equipment
Ping LI, Rong WEI, Tao FAN, Rui ZHAO, Bici JIANG, Xiaochao TIAN, Bingchun WANG   +6 more
doaj   +1 more source

Application research of borehole hydraulic fracturing technology for Linhuan Coal Mine

Gong-kuang zidonghua, 2015
In view of problems of low rate of gas extraction, too many drilling and short period of gas extraction in Linhuan Coal Mine, a method using borehole to implement hydraulic fracturing technology was put forward.
JIANG Qian, ZHANG Ruilin
doaj   +1 more source

Self-adaptive inverse wavefield transform and derived pseudo-wavefield characteristics under roadway-borehole observation of transient electromagnetic data

Meitian dizhi yu kantan
Objective To address the challenge of detecting aquifers outside the roadway excavation contour, this study combined the close-range detection via roadway-borehole transient electromagnetic (TEM) method with the wavefield transform.
Kerui FAN, Jianlei GUO, Ruoyu WANG, Ming ZHUANG, Fangze FAN, Sheng XU, Wentao ZHAO   +6 more
doaj   +1 more source

Construction method of a transparent tunneling geological navigation system based on integrated borehole geophysical exploration

Meitan kexue jishu
Accurate acquisition of advanced geological information and experience-based decision-making remain major challenges for intelligent coal mine excavation. This study proposes a construction method for a transparent excavation geological navigation system
Tao FAN, Zaibin LIU, Jianyuan CHENG, Wei LI, Yue HAO, Zhenhua DAI, Xiaofeng DUAN, Wenming LIU, Guihong LI, Yaoquan GAO   +9 more
doaj   +1 more source

A study on the technology of enhancing gas permeability and gas drainage by sectional hydraulic fracturing in directional long boreholes: a case study of the no. 8 coal seam in baode coal mine

Frontiers in Earth Science
Aiming at the technical problem of low efficiency of gas drainage in high-gas and low-permeability coal seams in China, this paper takes the No. 8 coal seam in Baode Coal Mine as the engineering background and conducts a study on the technology of ...
Zenghui Zhang, Jinlin Qiao, Sen Yang, Kaige Zheng, Di Zhang, Jian Zhang   +5 more
doaj   +1 more source