Results 31 to 40 of about 1,470,376 (107)

Field investigations of high stress soft surrounding rocks and deformation control

Journal of Rock Mechanics and Geotechnical Engineering, 2015
Field investigations of high stress soft rock deformations show that the high stress soft rock roadway can slide with large deformation. Severe extrusion and floor heave can also be subsequently observed.
Weijian Yu, Weijun Wang, Xinyuan Chen, Shaohua Du   +3 more
doaj   +1 more source

Failure Mechanism Analysis and Support Design for Deep Composite Soft Rock Roadway: A Case Study of the Yangcheng Coal Mine in China

Shock and Vibration, 2015
This paper presented a case study of the failure mechanisms and support design for deep composite soft rock roadway in the Yangcheng Coal Mine of China. Many experiments and field tests were performed to reveal the failure mechanisms of the roadway.
Bangyou Jiang, Lianguo Wang, Yinlong Lu, Shitan Gu, Xiaokang Sun   +4 more
doaj   +1 more source

Study on Stability for Intersection of Deep Soft Rock Roadway

, 2011
With the depth increasing continuously, more complicated of geological conditions, will make intersection in deep soft rock roadway is very difficult to support.
Xue Li Zhao, Yang Zhang, Zhan Jin Li
core   +1 more source

Optimal Support Solution for a Soft Rock Roadway Based on the Drucker–Prager Yield Criteria

, 2021
Through theoretical calculation, the stress and deformation of surrounding rock can be analyzed, providing guidance for the support design and optimization of soft rock roadways.
Meifeng Cai, Minghui Ma, Jiliang Pan, Qifeng Guo, Chi Ma   +4 more
core   +1 more source

Numerical Simulation Analysis of New Steel Sets Used for Roadway Support in Coal Mines

Metals, 2019
The surrounding rock control is a tough issue in the roadway with the swelling soft rock. The steel set is an important material for the control of swelling soft rock roadways.
Qinghai Li, Jingkai Li, Jinpeng Zhang, Changxiang Wang, Kai Fang, Limin Liu, Wenjing Wang   +6 more
doaj   +1 more source

Investigation on Deformation and Failure Characteristics and Stability Control of Soft Rock Roadway Surrounding Rock in Deep Coal Mine

, 2011
Numerical simulation and field measurement were carried out to investigate into laws of deformation and movement and the evolving characteristics of the plastic region around the roadway based on engineering conditions of deep soft rock roadway in ...
Ju Cai Chang, Guang Xiang Xie
core   +1 more source

Fracture evolution of a thick soft protection layer and the water inrush mechanism in overburden under longwall mining

Deep Underground Science and Engineering, EarlyView.
Through shear–tensile creep tests and viscoelastic modeling, the fracture evolution of thick soft protective layers is clarified. Results show thickness‐dependent rheological failure modes that govern four types of roof water inrush, providing a mechanism‐based framework for hazard prediction and control. Abstract In the Jurassic coal‐bearing strata of
Mengnan Liu, Wei Qiao, Xianggang Cheng, Xiangsheng Meng, Peichao Feng   +4 more
wiley   +1 more source

Dynamic prediction of coal and gas outburst risk based on quantitative analysis of stress–energy evolution and adaptive correction

Deep Underground Science and Engineering, EarlyView.
This study quantitatively analyzed the spatiotemporal evolution of stress redistribution ahead of the working face by integrating coal seam distribution, tectonic stress anomalies, gas pressure, and mining‐induced disturbances. An R‐value criterion for coal and gas outburst (CGO) risk assessment was established based on energy principles.
Yingjie Zhao, Xueqiu He, Dazhao Song, Liming Qiu, Minggong Guo, Jie Liu, Qiang Liu, Yi Zhu   +7 more
wiley   +1 more source

Optimization of Blasting‑Induced Roof Cutting Parameters in Key Stratum and Its Application in Gob‑Side Entry Retention Technology

Energy Science &Engineering, EarlyView.
This study addresses hard roof coal seam conditions by optimizing key stratum blasting‐cutting parameters through theoretical analysis, numerical simulation, and field tests. It proposes calculation methods for blast hole spacing and delay timing based on stress wave theory, controlling roadway deformation within 35 mm, thereby enhancing resource ...
Qiong Liu, Duanxiang Fu, Hongbin Li
wiley   +1 more source

Physical model study on the mechanism of floor heave for the deep-buried roadway excavated in soft rock of gently inclined thin strata

Scientific Reports
Strata structure is an important factor affecting floor heave of deep soft rock roadway, however, the mechanism of floor heave induced by the rock structure has not been fully understood, so it is still necessary to study the floor heave of deep-buried ...
Feng Chen, Eryu Wang, Chengyu Miao, Xiaoming Sun, Peng Song, Chengwei Zhao   +5 more
doaj   +1 more source