Results 11 to 20 of about 1,488 (167)

Study on deformation law of surrounding rock of gob side-entry retaining by roof cutting and pressure relief

Meikuang Anquan, 2022
The severe mining pressure of surrounding rock along goaf retaining roadway has become the bottleneck of safe and efficient production of coal mine.
LYU Weibin, LU Kai, REN Zhuoxin, LIAN Qiang   +3 more
doaj   +2 more sources

Key Parameters of Surrounding Rock Roof Cutting and Pressure Relief Control in Soft Rock Roof Roadway of Deep Mine Stope and Its Engineering Application

Lithosphere, 2022
In this study, the movement and failure law of working face overburden and the distribution characteristics of mining stress are analyzed using laboratory test and numerical calculation methods to address the problems of large deformation, failure ...
Jucai Chang, Tenggen Xiong, Chao Qi, Chuanming Li, Dongdong Pang   +4 more
doaj   +2 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   +2 more sources

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

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   +2 more sources

The influence of hard roof cutting and pressure relief technology on the deformation law of surrounding rock in roadways

Gong-kuang zidonghua
The goaf roadways have problems of high surrounding rock stress and large deformation under the conditions of hard roof and wide coal pillars in thick coal seams.
ZHAO Changxin, LI Xiaoxu, SHI Meng, JI Ruifeng, ZHANG Yan   +4 more
doaj   +2 more sources

Application research on roadway protection technology by hydraulic fracturing roof cutting pressure relief in underground coal mine

Gong-kuang zidonghua, 2019
The gas concentration of No.8 coal seam in north 3 panel of Duerping Coal Mine is high, the direct roof and the basic roof are both hard limestone, and it is easy to form a large area of hanging roof in the upper corner after stoping on working face ...
DONG Zhiyong
doaj   +2 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   +2 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   +2 more sources

Application of pre-splitting blasting roof-cutting pressure relief technology for roadway protection under hard roof. [PDF]

Sci Rep
The 360,606 working face of Xinji 1# Mine was taken as an engineering case to address the significant safety hazards associated with coal mining under hard roof. A key technical scheme for pre-splitting blasting roof-cutting pressure relief was developed by theoretical analysis, numerical simulation, and field experiments.
Li Y, Chang G, Hu D, Song W.
europepmc   +3 more sources

Overlying strata movement and surface deformation through roof cutting and pressure relief: Geomechanics model and field tests

International Journal of Coal Science & Technology
The Self-formed roadways by roof cutting and pressure relief (SF-RCPR) represents a novel approach that eliminates the need for coal pillars by naturally creating roadways through Roof Cutting Pressure Relief (RCPR) technology.
Jiong Wang, Peng Liu, Jian Jiang, Lei Ma, Zhen Yang, Zimin Ma, Manchao He   +6 more
doaj   +2 more sources