Results 31 to 40 of about 6,194 (127)

Parameter Optimization of Constant Pressure Grouting Technology for Borehole Sealing with Inorganic Noncondensable Material in Tectonic Coalbed of South China

Geofluids, 2023
To solve the problem of a rapid attenuation of gas concentration along with drainage borehole collapse in the tectonic coalbeds of South China, a constant pressure grouting technology with inorganic, noncondensable material was proposed.
Zhao Pengtao, Wang Haiqiao, Wang Long, Wang Xinlei, Ma Hongyu   +4 more
doaj   +1 more source

Seepage Law of Nearly Flat Coal Seam Based on Three-Dimensional Structure of Borehole and the Deep Soft Rock Roadway Intersection

Energies, 2022
Exploring the evolution characteristics of gas seepage between boreholes during the drainage process is critical for the borehole’s layout and high-efficiency gas drainage.
Lei Zhang, Chen Jing, Shugang Li, Ruoyu Bao, Tianjun Zhang   +4 more
doaj   +1 more source

A Gas–Solid–Liquid Coupling Model of Coal Seams and the Optimization of Gas Drainage Boreholes

Energies, 2018
For a gas–solid–liquid coupling model of coal seams, previous permeability models basically supposed uniaxial strains as the boundary condition for coal reservoirs without considering the deformation caused by changes in humidity.
Yuexia Chen, Jiang Xu, Shoujian Peng, Fazhi Yan, Chaojun Fan   +4 more
doaj   +1 more source

Optimization of multi-hole hydraulic cutting combined extraction parameters under superposition effect

Gong-kuang zidonghua, 2023
In the process of hydraulic cutting in low permeability and high gas coal seams, there are problems such as unclear cutting disturbance range and unclear optimal hole spacing for cutting drilling.
NI Xing
doaj   +1 more source

Permeability enhancement of deep hole pre-splitting blasting in the low permeability coal seam of the Nanting coal mine. [PDF]

PLoS ONE, 2018
To solve the hidden danger of high methane and low permeability gas in the coal mining process, potentially affecting the safety production in an orderly way, we propose the use of deep hole blasting technology to improve the permeability of the coal ...
Zhengyi Ti, Feng Zhang, Jin Pan, Xiaofei Ma, Zheng Shang   +4 more
doaj   +1 more source

A phase transition-induced fracturing permeability enhancement technology using carbon dioxide capsules for low-permeability coal seams and its application

Meitian dizhi yu kantan
Objective and Methods To address engineering challenges like high gas content, high pressure, and low drainage efficiency in the mining of low-permeability coal seams, this study developed a phase transition-induced fracturing and permeability ...
Mao LI, Xinchuan FAN, Hui FU
doaj   +1 more source

The Seepage and Stability Performance Assessment of a New Drainage System to Increase the Height of a Tailings Dam

Applied Sciences, 2018
Effective methods for extending the storage capacity of tailings for a mining company include expanding and increasing the height of the tailings dam. However, this change could lead to an uplift in the phreatic line and a decrease in the slope stability.
Chong Liu, Zhenzhong Shen, Lei Gan, Liqun Xu, Kailai Zhang, Tian Jin   +5 more
doaj   +1 more source

Analyzing the permeability enhancement effect of hydraulic slotting for low-permeability coal seams based on a stress-diffusion-seepage coupling model

Meitian dizhi yu kantan
Objective and MethodsThis study aims to improve the permeability enhancement effect of coal seams for gas drainage. Targeting the soft, low-permeability coal seams with complex gas occurrence conditions in the Baiping mining area and considering the ...
Hongtu ZHANG, Tian ZHOU, Dengke WANG, Botao LI, Yong LUO, Rongsheng PAN, Jiahao TANG, Weiyong LU   +7 more
doaj   +1 more source

The Effect of Drainage Radius Interference on the Design of Infill Well in FA Field

American Journal of Innovation in Science and Engineering
In mature fields like FA Field, addressing production decline involves strategic infill well drilling to boost output from active structures. The location and number of infill wells are determined through bubble map analysis during development planning.
null Herianto, Dyah Rini Ratnaningsih, Umiyatun Choiriah, Fitrah Aulia   +3 more
openaire   +1 more source

Geological characteristics and development effect evaluation of coalbed methane reservoirs in Panguan syncline, Guizhou Province

Shiyou shiyan dizhi
The Upper Permian Longtan Formation in Guizhou Province contains multiple coal seams with abundant coalbed methane (CBM) resources, providing a solid base for CBM development.
Haiyang HU, Fuqin YANG, Jie CHEN, Yi LOU, Yuting WAN   +4 more
doaj   +1 more source