A Potential Method for Predicting Coal-Mine Floor Heave: ABSTRACT

AAPG Bulletin ◽  
1982 ◽  
Vol 66 ◽  
Author(s):  
Robert C. Speck, John D. Rockaway
Keyword(s):  
Coal Mine ◽  
Potential Method ◽  
Floor Heave ◽  
Mine Floor

A new coal mine floor rating system and its application to assess the potential of floor heave

2020 ◽  
Vol 128 ◽  
pp. 104241 ◽  
Author(s):  
Sungsoon Mo ◽  
Hamed Lamei Ramandi ◽  
Joung Oh ◽  
Hossein Masoumi ◽  
Ismet Canbulat ◽  
...  
Keyword(s):  
Coal Mine ◽  
Rating System ◽  
Floor Heave ◽  
Mine Floor

The Causes Analysis and Control Measures about Rapid Floor Heave in Deep Mine

2011 ◽  
Vol 94-96 ◽  
pp. 786-790 ◽  
Author(s):  
Sheng Zhang ◽  
Zheng Bei ◽  
Yi Fei Zhang
Keyword(s):  
Reference Values ◽  
Coal Mine ◽  
Control Measures ◽  
Deep Mine ◽  
Mine Production ◽  
Floor Heave ◽  
Short Time ◽  
And Control

With the depth of coal mine increasing, it appeared a phenomenon of rapid floor heave in some roadways in a short time, which threaten greatly to the normal mine production and the lives safety of workers. The causes and control measures about rapid floor heave are analyzed in this paper. Which has a certain reference values for preventing and controlling rapid floor heave in deep mine.

scholarly journals Research on Mechanism and Control of Floor Heave of Mining-Influenced Roadway in Top Coal Caving Working Face

Energies ◽  
2020 ◽  
Vol 13 (2) ◽  
pp. 381 ◽  
Author(s):  
Xingping Lai ◽  
Huicong Xu ◽  
Pengfei Shan ◽  
Yanlei Kang ◽  
Zeyang Wang ◽  
...  
Keyword(s):  
Coal Mine ◽  
High Efficiency ◽  
Soft Rock ◽  
Surrounding Rock ◽  
High Yield ◽  
Geological Investigation ◽  
Geological Conditions ◽  
Floor Heave ◽  
Damage Depth ◽  
Squeeze Effect

The stability of the surrounding rock is the key problem regarding the normal use of coal mine roadways, and the floor heave of roadways is one of the key factors that can restrict high-yield and high-efficiency mining. Based on the 1305 auxiliary transportation roadway geological conditions in the Dananhu No. 1 Coal Mine, Xinjiang, the mechanism of roadway floor heave was studied by field geological investigation, theoretical analysis, and numerical simulation. We think that the surrounding rock of the roadway presents asymmetrical shrinkage under the original support condition, and it is the extrusion flow type floor heave. The bottom without support and influence of mining are the important causes of floor heave. Therefore, the optimal support scheme is proposed and verified. The results show that the maximum damage depth of the roadway floor is 3.2 m, and the damage depth of the floor of roadway ribs is 3.05 m. The floor heave was decreased from 735 mm to 268 mm, and the force of the rib bolts was reduced from 309 kN to 90 kN after using the optimization supporting scheme. This scheme effectively alleviated the “squeeze” effect of the two ribs on the soft rock floor, and the surrounding rock system achieves long-term stability after optimized support. This provides scientific guidance for field safe mining.

scholarly journals STUDY ON STABILITY CONTROL OF COAL MINE TUNNEL EXCAVATED IN WEAK ROCK MASS IN INDONESIA

2021 ◽  
Vol 6 (4) ◽  
Author(s):  
Phanthoudeth Pongpanya ◽  
Takashi Sasaoka2 ◽  
Hideki Shimada ◽  
Vongsavanh Soysouvanh
Keyword(s):  
Rock Mass ◽  
Numerical Simulations ◽  
Coal Mine ◽  
Support Systems ◽  
Stability Control ◽  
Weak Rock ◽  
Support Design ◽  
Floor Heave ◽  
Weak Rock Mass ◽  
The Stability

This paper focuses on the stability analysis and support design of the coal mine tunnel excavated in weak rock mass in an Indonesian underground coal mine through numerical simulations using the FLAC3D software. The PT Gerbang Daya Mandiri (GDM) coal mine situated in Indonesia was selected as a mine site in this study. According to the results of a series of numerical simulations, the stability of the mine tunnel decreases by increasing the depth and stress ratio. Ground control problems, for example falling roof, sidewall collapse, and floor heave are expected unless an appropriate support system is anticipated. Three support systems, including friction rockbolt, steel arch, and shotcrete are discussed as methods to stabilize the roof and sidewalls of the mine tunnel. From the simulated results, the steel arch is considered to be the most effective support method when compared with other support systems. The steel arch which is installed with closer space and larger crosssection delivers a better stability control to the roof and sidewalls of the mine tunnel. Although the stability of the roof and sidewalls of the mine tunnel can be maintained effectively by the steel arch support, the occurrence of floor heave is expected when the mining depth is increased. To control the floor stability of the mine tunnel, three techniques by applying cablebolt, invert-arch floor, and grooving method are therefore investigated and discussed. Based on simulated results, the heaving of the floor is well controlled after the cablebolt, invert-arch floor, and grooving methods are applied. Nevertheless, it is found that controlling the floor heave by cablebolt support could be the most suitable method comparing with other support systems in terms of the installation process, providing flat and safe working conditions of the floor, and economy. Additionally, the cablebolt with closer row space and longer length works more effectively to control the heaving problem of the floor. Keyword

Sign in / Sign up

Export Citation Format

Share Document