Results 31 to 40 of about 9,646,321 (185)

Mechanism and control strategies for asymmetric floor heave in extra-thick coal seam roadways under high stress. [PDF]

Sci Rep
To address the intense stress evolution and severe floor heave in roadways of extra-thick coal seams, this study investigates the catastrophic evolution laws and mechanisms of medium-hard floor strata using the 122,110 working face of Caojiatan Coal Mine
Zhang J, Sun J, Wang B, Yang T, He Y, Gao S, Qin G, Zhang Y.   +7 more
europepmc   +2 more sources

Rock Mass Bolting in Coal Mine Workings for Floor Heave Control

Applied Sciences
This article addresses the problem of floor heave in preparatory mine workings of the Karaganda Coal Basin and proposes technological solutions based on rock mass anchoring systems. Long-term field observations, supported by analytical interpretation and numerical modeling, made it possible to identify the principal factors controlling deformation ...
Nail Zamaliyev, Denis Akhmatnurov, Piotr Małkowski, Vladimir Demin, Kainazarova Ainash, Ravil Mussin, Nikita Ganyukov, Shulepin Andrey   +7 more
openaire   +2 more sources

Control mechanism and technique of floor heave with reinforcing solid coal side and floor corner in gob-side coal entry retaining

International Journal of Mining Science and Technology, 2012
Abstract Floor heave is the most common convergence in gob-side entry retaining. The paper analyzes the form, process and characteristics of gob-side entry retaining with the comprehensive methods of theoretical analysis, numerical simulation and the field trial.
Jian-Biao Bai, Shuqi Ma, Shuai Yan
exaly   +3 more sources

Control of floor heave with rock bolts-steel piles coupling support technology

International Journal of Coal Science & Technology
The uncontrolled floor heave in gob-side entry retaining is the serious problem of underground coal mining. This phenomenon has gravely restricted the application of pillarless mining that has been increasingly used in coal mines in recent years.
Ivan Sakhno, Svitlana Sakhno
doaj   +2 more sources

Floor Heave Mechanism and Control Technique of Water‐Rich Soft‐Rock Roadway in Thick Coal Seam

Energy Science & Engineering
The severe deformation of the surrounding rock of the coal floor in Shanghaimiao mining area is affecting the safe, efficient production of mine wells in this region.
Fulian He, Wenli Zhai, Weixin Liu, Ning Sun, Jiayu Song, Jianlong Zhang, Yanhao Wu   +6 more
doaj   +2 more sources

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

, 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, Zhou, Xuming,, Sheng Wang, Meng, Jingjing,, Zhang, Linhan,, Zhen Li, Li, Xuelong,, Dongdong Pu, Linhan Zhang, Jingjing Meng, Wang, Longkang,, Li, Zhen,, Xuelong Li, Longkang Wang, Wang, Sheng,, Pu, Dongdong,   +15 more
core   +1 more source

Research on Key Technologies of Floor Heave Control in Soft Rock Roadway [PDF]

Advances in Civil Engineering, 2020
Aiming at the floor heave of transportation concentrated roadway on the West Wing (TCRWW) of No. 1 Coal Seam in Danhou Mine, it affects underground coal transportation and mine safety production. First, the lithology and structure of the roadway floor were sampled and tested, and it was found that it contained clay minerals with high hydrophilicity ...
Lei Shi, Haidong Zhang, Peng Wang
openaire   +2 more sources

Numerical study on floor stability control under high bearing pressure in roadway excavation along filling body

Meikuang Anquan, 2022
In order to solve the problem of roadway surrounding rock support caused by roadway floor heave along the filling body, taking Lu’an Changcun Coal Mine as the engineering background, the advantages and disadvantages of two control schemes such as floor ...
WU Jianbiao, WU Rui, XU Hongwei, ZHANG Penghui   +3 more
doaj   +1 more source

Study on failure characteristics and control of soft rock roadway floor

Meitan kexue jishu, 2023
In order to study the regularity of floor heave deformation and instability of soft rock roadway under different horizontal stress boundary conditions, the return air roadway of 50213 working face of Guantun Coal Mine was taken as the engineering ...
ZHANG Jie, GAO Shoushi, LI Tong, HUANG Xiaoping, YANG Tao, WANG Zhanghui, HE Yifeng, HAN Jinbo   +7 more
doaj   +1 more source

Distributed optical fiber measurement of floor heave evolution in mining roadway

Meitan kexue jishu, 2023
With the deepening of coal mining and the upsizing of mining equipment, the floor heave of the mining roadway has become an important problem that restricts the efficient and safe mining of the working face.
CHAI Jing, HAN Zhicheng, LEI Wulin, ZHANG Dingding, MA Chenyang, SUN Kai, WENG Mingyue, ZHANG Youzhi, DING Guoli, ZHENG Zhongyou, ZHANG Yin, HAN Gang   +11 more
doaj   +1 more source