Results 11 to 20 of about 3,345,704 (190)

Study on the Ground Pressure Manifestation Patterns of Roof Cutting and Pressure Relief

Applied Sciences (Switzerland)
Pillarless mining technology is of great significance for improving coal recovery rates, but the intense mining-induced stress disturbances on gob-side entries often lead to surrounding rock instability. In this study, we focused on the ground control challenges in the headgate of Panel 81308 at Huayang Mine No. 2.
Zheng, Runhu, Hao, Bingyuan, Shi, Chaoyao, Li, Tongxi   +3 more
exaly   +4 more sources

Study on roof deformation mechanism and control technology of cross-fault roof cutting and pressure relief self-forming roadway [PDF]

Meitan kexue jishu
Aiming at the problem that roof deformation of cross fault roof cutting and pressure relief self-formed roadway is large and difficult to support, the mechanism of roof deformation of self-formed roadway in cross fault roof cutting and pressure-relieving
Zhibiao GUO, Yuanxin ZHAO, Dongshan YANG, Jingwei GAO, Songyang YIN, Xiaohui KUAI   +5 more
doaj   +3 more sources

Key technology of cutting seam drill rig for automatic roadway forming by roof cutting and pressure relief without coal pillar

Meikuang Anquan, 2023
In order to solve the problems such as low efficiency, large deviation of drilling angle adjustment and poor directness of drilling in roof pre-splitting drilling technology, ZDY2-300LM slot-cutting drill was developed.
LI Xutao
doaj   +3 more sources

Mechanism of Roof Cutting and Pressure Relief for Double Roadway Arrangement in Thick Coal Seam

Taiyuan Ligong Daxue xuebao
[Purposes] This research is conducted to exploret the roof movement law of double roadway arrangement in thick coal seam and the abutment pressure distribution mechanism of surrounding rock.
HAN Bingcheng, ZHANG Changsuo, ZHANG Chen, WANG Shiyu   +3 more
doaj   +3 more sources

Study of Reasonable Roof Cutting Parameters of Dense-Drilling Roof Cutting and Pressure Relief Self-Forming Roadway in Non-Pillar Mining

Applied Sciences (Switzerland)
Roof cutting by dense drilling is one of the main methods of gob-side entry retaining. Taking the 203 working face of the Ruineng Coal Mine as the engineering background, a mechanical model is established to clarify the roof breaking mechanism. Numerical simulation is conducted to analyze the roof cutting effects of different parameters, and reasonable
Hongping Yuan, Panshi Xie
exaly   +4 more sources

Floor deformation control for roof cutting and pressure relief in gob-side entry retaining of deep buried mines

Gong-kuang zidonghua
Currently, research and practice on roadway floor heave mainly explore the deformation mechanism and control technology of roadway floor. The mechanical analysis of floor before and after roof cutting and pressure relief in gob-side entry retaining is ...
SUN Jingkang, TU Min, ZHAO Qingchong, DANG Jiaxin, ZHANG Xin, LI Yamian   +5 more
doaj   +3 more sources

Experimental study on mechanical response failure mechanism of dynamic pressure roadway based on roof cutting and pressure releasing technology

Meikuang Anquan, 2021
In this paper, according to the current situation of fast deformation, large deformation amount and complicated deformation method of surrounding rock in dynamic pressure roadway, using field test and theoretical calculation method, the hydraulic roof ...
YANG Zheng, DING Yanxiong, GAO Xiaojun
doaj   +2 more sources

Application of Pre-Splitting and Roof-Cutting Control Technology in Coal Mining: A Review of Technology

Energies, 2022
According to the development requirements of green mining of coal resources, it is imperative to improve the extraction rate of coal and the application of safe and efficient mining technology.
Shengrong Xie, Yiyi Wu, Fangfang Guo, Hang Zou, Dongdong Chen, Xiao Zhang, Xiang Ma, Ruipeng Liu, Chaowen Wu   +8 more
doaj   +2 more sources

Research and application of combined pressure relief technology of roof hydraulic fracturing and deep hole blasting

Meikuang Anquan, 2022
In order to realize the smooth collapse of high-strength composite roof in 1311 working face of Zhaozhuang Coal Industry company and avoid strong ground pressure disaster caused by large-area roof suspension, firstly, the composite pressure relief ...
SI Ruijiang, ZHAO Lulu, ZHANG Guanghui, ZUO Jiehai, XU Lijun, ZHANG Aoze, JIAO Yang, LI Dongliang   +7 more
doaj   +2 more sources

Research on the Deformation and Failure Mechanism of Flexible Formwork Walls in Gob-Side-Entry Retaining of Ultra-Long Isolated Mining Faces and Pressure Relief-Control Technology via Roof Cutting

Applied Sciences
To resolve the critical issues of severe deformation, structural failure, and maintenance difficulties in the advanced reuse zone of gob-side-entry retaining roadways under pillarless mining conditions in ultra-long fully mechanized top-coal caving ...
Heng Wang, Junqing Guo
doaj   +4 more sources