Results 51 to 60 of about 361,142 (196)

Control Technology of Soft Rock Floor in Mining Roadway with Coal Pillar Protection: A case study

Energies, 2019
This study considered the mining roadway with coal pillar protection in the fully mechanized caving face of the Dananhu No.1 Coal Mine, China. Theoretical analysis, numerical simulation, and field tests were conducted, and the stress environment ...
Housheng Jia, Luyao Wang, Kai Fan, Bo Peng, Kun Pan   +4 more
doaj   +1 more source

Strengthening urban resilience in China through underground infrastructures management: Addressing global climate challenges with technological solutions

Deep Underground Science and Engineering, EarlyView.
This paper explores how climate‐resilient technologies, such as smart grids, digital twins, and self‐healing materials, can enhance urban resilience. It highlights the urgent need for proactive planning, public‐private collaboration, and data‐driven innovation to future‐proof underground infrastructure amid accelerating climate and urban pressures ...
Kai Chen Goh, Tonni Agustiono Kurniawan, Christia Meidiana, Abdelkader Anouzla, Faissal Aziz, Imran Ali, Joan Cecilia C. Casila, M. Imran Khan, Dongdong Zhang, Meihui Jiang, Mohd Hafiz Dzarfan Othman, Md Munir Hayet Khan, Kasun Kumara Dissanayake   +12 more
wiley   +1 more source

Stress-Relief–Anchor-Grouting, a Collaborative Control Technology for Severe Extrusion Floor Heave in a Deep Roadway: A Case Study

, 2023
Severe extrusion floor heave is the most common type of failure of floors in deep roadways, and it is also a major problem restricting the safe and efficient mining of deep coal resources.
Liuan Zhao, Dawei Li, Shiyi Huang, Sijiang Wei, Chunsheng Yu, Meng Wang, Jie Li, Donghuang Shang   +7 more
core   +1 more source

A Study on the Floor Heave Characteristics of a Gob-Side Entry in Deep-Thick Coal Seam During Longwall Mining

Geofluids
Floor heave control becomes more and more prominent in engineering practice with the increased mining depth of the working face. The gob-side entry of the 21404 working face in Hulusu Coal Mine was taken to be the engineering background to study the gob ...
Yinghao Hao, Jinhai Liu, Xiaodong Miu, Guoli Ding, Pei Qi, Hao Wu, Linsheng Gao   +6 more
doaj   +1 more source

Advancing mine pillar design: Evaluating traditional methods and integrating AI for enhanced stability of pillars in the Great Dyke, Zimbabwe

Deep Underground Science and Engineering, EarlyView.
B1 is bord width 1, B2 is bord width 2, L is the pillar length, W is the pillar width, red color and letter A represent the pillars, and white color and number 1 represent excavated areas. Pstress is the average pillar stress; σv is the vertical component of the virgin stress, MPa; and e is the areal extraction ratio. e = B o B o + B P ${\rm{e}}=\frac{{
Tawanda Zvarivadza, Hendrik Grobler, Peter Apata Olubambi, Moshood Onifade, Manoj Khandelwal   +4 more
wiley   +1 more source

Data from: Strain energy analysis of floor heave in longwall gateroads

, 2018
Floor heave in longwall gateroads is a severe issue that affects the mining safety and efficiency. Researchers, however, have limited understanding on the floor heave mechanism because the deformation of the post-failure rocks in the floor is seldom ...
Wang, Kewei, Li, Wenfeng, Wang, Meng, Zheng, Dongjie   +3 more
core   +2 more sources

Study of Floor Heave Mechanism in Deep Soft Rock Roadway

DEStech Transactions on Environment, Energy and Earth Science, 2017
Flac3D is utilized to study floor heave mechanism and propose corresponding solving method of floor bolt-grouting in roadways under 550m in Longmei company. In addition, Flac3D can perform the simulation of stress field and displacement field and plastic zone in order to improve rationality of the scheme.
Xiaoyu Zhang, Tao Li, Gang Chen, Hongwei Liu   +3 more
openaire   +2 more sources

Mechanism and disaster control new technology of strong ground pressure manifestation in ultra‐large mining face

Deep Underground Science and Engineering, EarlyView.
In response to the problem of strong mining pressure manifestation along the goaf roadway in a thick coal seam mining area, this study uses a new type of combined blasting roof cutting technology to effectively control the manifestation and deformation of mining pressure along the goaf roadway.
Xiaoding Xu, Manchao He, Jun Yang, Yubing Gao, Qiang Fu, Qing Ma, Yajun Wang   +6 more
wiley   +1 more source

Mechanisms and control of mine floor heave. [PDF]

, 1996
Floor heave has been one of the important ground control problems in the underground coal mining industry. However, the mechanisms of floor heave have not been fully understood although some efforts have been made by many researchers.
Wang, Yajie
core  

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