Results 1 to 10 of about 8,123 (220)

Effect of bolting on roadway support in extremely weak rock [PDF]

SpringerPlus, 2016
In mine roadway support operations, floor bolting not only played a role in floor heave control, but also in reinforcing roof and its two sides. Correspondingly, bolting of roof and two sides also played a part in floor heave control. To quantify the effect of such bolting, based on roadway support in extremely weak rock, three physical models were ...
Li, Qinghai, Shi, Weiping, Qin, Zhongcheng   +2 more
openaire   +3 more sources

Study on bearing capacity characteristics of steel structure support in soft rock roadway

Energy Science & Engineering, 2021
When the soft rock roadway in underground mine is supported by steel frame, the bearing capacity of steel structure is the key to the success of roadway support.
Ya‐bin Wu, Jian‐hua Hu, Xu‐yang Zhang, Ya‐guang Qin, Zhi‐bo Zhang, Xing‐chang Zhao   +5 more
doaj   +2 more sources

Study on deformation characteristics and support technology of roadway in deep complex stress field [PDF]

Scientific Reports
The deformation of deep roadway is more severe under the influence of high stress, especially in the complex stress field, which is difficult to support and seriously affects the safety.
Sheng-jun Li, Wei-yong Lu, Xiao-chuan Ma, Jing-feng Mao, Xiao-dong Zheng, Chang-de Yang, Jian-ye Feng   +6 more
doaj   +2 more sources

Case study on the secondary support time and optimization of combined support for a roadway under high in-situ stress

Geomechanics and Geophysics for Geo-Energy and Geo-Resources
Roadway support can effectively improve the stability of roadway excavation and ensure the safety of underground mining. This study investigates the secondary support time and parameter optimization of combined support for a deep roadway in the stage of ...
Weile Geng, Wensong Wang, Gun Huang, Changbao Jiang, Zhenlong Song, Shengli Guo, Ziwen Dong   +6 more
doaj   +2 more sources

Control for the large section roadway under small abandoned mines in the same coal seam by secondary support

Energy Science & Engineering, 2020
To control roadway under small abandoned mines in ultrathick coal seam, this paper analyzed its deformation and failure characteristics. As a result, the roadway occurred roof leakage and right rib extrusion. Based on above characteristics, the secondary
Yang Tai, Hongchun Xia, Hongjie Liu, Zhanyuan Ma, Yanqun Zhang   +4 more
doaj   +2 more sources

Continuous Support for Roadways [PDF]

Energies, 2021
Opening deeper coal seams requires constructing underground mine roadways in difficult geological conditions. Supporting of such roadways is subjected to a very high load from the rock mass. The types of roof supports used so far do not provide immediate support for the rock mass, which tends to converge the roadway, allowing for a rapid build-up of ...
Krzysztof Mazurek, Marek Szyguła, Andrzej Figiel, Krzysztof Filipowicz   +3 more
openaire   +2 more sources

Advanced Support Technologies in Roadway

Applied Sciences, 2022
In the continuous development and application of underground spaces (such as roads, tunnels and underground caverns), safe and efficient support technology is an important means to maintain the stability and integrity of roadways [...]
Jiahao Sun, Guoming Liu, Xiangming Hu
openaire   +3 more sources

Investigation of the evolution and control of fractures in surrounding rock under different pressure relief and support measures in mine roadways prone to rockburst events [PDF]

Royal Society Open Science, 2021
This paper studies the evolution and control of surrounding rock under different pressure relief support conditions in mine roadways in which rockburst events have occurred.
Yongliang He, Mingshi Gao, Dong Xu, Xin Yu   +3 more
doaj   +1 more source

Research on surrounding rock control technology of deep roadway based on butterfly failure theory

Meitan kexue jishu, 2023
At present, roadway surrounding rock control is still one of the major problems in deep mining of coal resources. The formation and development of the plastic zone of the surrounding rock is the main cause of large deformation and failure of roadway.
WANG Weijun, FAN Lei, MA Yujie, YUAN Chao   +3 more
doaj   +1 more source

Research on Theory and Technology of Floor Heave Control in Semicoal Rock Roadway: Taking Longhu Coal Mine in Qitaihe Mining Area as an Example

Lithosphere, 2022
As one of the most common disasters in deep mine roadway, floor heave has caused serious obstacles to mine transportation and normal production activities. The third section winch roadway in the third mining area of Qitaihe Longhu coal mine has a serious
Xuming Zhou, Sheng Wang, Xuelong Li, Jingjing Meng, Zhen Li, Linhan Zhang, Dongdong Pu, Longkang Wang   +7 more
doaj   +1 more source