Engineering Loess Landslides Types and some Research Thoughts

2011 ◽  
Vol 90-93 ◽  
pp. 1291-1294
Author(s):  
Dong Qi Tang ◽  
Jian Bing Peng
Keyword(s):  
Economic Development ◽  
Water Activity ◽  
Underground Mining ◽  
Mechanical Vibration ◽  
Mining Activities ◽  
Loess Landslide ◽  
Loess Area ◽  
Vibration Effect ◽  
Loess Landslides ◽  
Main Effects

With the rapid economic development of loess area, engineering loess landslides have become a serious danger to loess area people. It is an important engineering geological problem. Through making classify narrate to the harmful of engineering loess landslides. The main effects of engineering loess landslides are divided into four types. First type is human water activity cause loess landslides. Second is load and unload activities cause the loess landslides. Third is mechanical vibration effect inducing loess landslide. Fourth, loess landslides are induced by underground mining activities. Presents the performance characteristics and take conceive of engineering loess landslides to further research advances.

Lvliang Typical Loess Landslide Mechanism and Characteristics

2011 ◽  
Vol 90-93 ◽  
pp. 1313-1317 ◽  
Author(s):  
Dong Qi Tang ◽  
Jian Bing Peng ◽  
Qi Yao Wang ◽  
Ji Shan Xu
Keyword(s):  
Scientific Basis ◽  
Economic Activities ◽  
Loess Landslide ◽  
Main Research ◽  
Loess Area ◽  
Landslide Mechanism ◽  
Geological Disasters ◽  
Loess Landslides

The loess area ecology environment is very fragile, happening various geological disasters, loess landslides is one of the most mainly the geological disasters in loess area. Lvliang region loess hilly develops common, with the human economic activities increasing, inducing a lot of loess landslides. Taking typical loess landslides as the main research object, the loess landslides of Lvliang region from two aspects of characteristics and mechanism are analyzed. It is considered that the main types of the loess landslides are located within the layer of loess. Landslide is controlled by topography and lithology, landslide mechanism is induced by human economic activities. Through research for the region loess landslides hazard prevention provide the scientific basis.

Characteristic and Stability Analysis for Loess Seismic Landslide in Valley City

2012 ◽  
Vol 594-597 ◽  
pp. 1856-1863
Author(s):  
Wang Nai ◽  
Lan Min Wang ◽  
Zhong Xia Yuan ◽  
Wang Qian
Keyword(s):  
Scientific Basis ◽  
Earthquake Risk ◽  
Disaster Prevention ◽  
Loess Landslide ◽  
Loess Area ◽  
Loess Landslides ◽  
Basic Characteristics ◽  
Seismic Landslide ◽  
Landslide Disaster ◽  
Valley City

In the light of heavy seismic landslide disasters in the valley city of loess area, 104 typical loess landslides caused by the 1654 Tianshui(Ms 8.0), 1718 Tongwei(Ms 7.5) and 1920 Haiyuan(Ms 8.5) earthquakes were studied, main landslide type and basic characteristics of seismic landslide in the valley city were analyzed. The landslides in the valley city of loess area are divided into three types: homogeneous loess landslide, loess interface landslide and loess-mudstone cutting layer landslide. Through the investigation and analysis of earthquake risk, the suggestion about the 22 dangerous landslides in Tianshui is given. The study is expected to supply scientific basis for seismic landslide disaster prevention and reduction in valley city of loess area.

Study of Real-Time Monitoring System on the Underground Mining Activities Based on Explosion Source Location Technology

2012 ◽  
Vol 190-191 ◽  
pp. 1179-1182
Author(s):  
Xiu Zhi Meng ◽  
Zeng Zhi Zhang ◽  
Zong Sheng Wang
Keyword(s):  
Real Time ◽  
Monitoring System ◽  
Underground Mining ◽  
Coal Mines ◽  
Source Location ◽  
Environmental Damage ◽  
Mining Activities ◽  
Real Time Monitoring ◽  
P Waves ◽  
Vibration Sensors

The mining boundary ultra-layer & cross-border of some small coal mines in the profit-driven results in a many of safety accidents, waste of resources and environmental damage while the state can not achieve the full uninterrupted supervision because of the backward monitoring tools and equipment. In this situation the real-time monitoring system for underground mining activities is designed based on explosion source location technology. Small and medium-sized coal mines tunnel by blasting operations. The P waves are picked up by acceleration vibration sensors buried underground that are identified and dealt by using wavelet transform. The bursting point is located by the Geiger algorithm and displayed in the mine’s electronic map. The monitor system has good stability, small positioning error by field-proven.

The Records of Slope Reinforcement Engineering in a Loess City

2012 ◽  
Vol 226-228 ◽  
pp. 1365-1370
Author(s):  
Qi Xia Liu ◽  
Liang Fan
Keyword(s):  
Slope Stability ◽  
Good Practice ◽  
Stability Study ◽  
Practice Effect ◽  
Slope Instability ◽  
Loess Landslide ◽  
Loess Area ◽  
Loess Slope ◽  
Geological Conditions ◽  
Reinforcement Measures

This article selected a typical loess slope engineering as the research object, and through the characteristics of loess landslide, landslide environmental geological conditions, the formation mechanism of the landslide study of the loess area of urban slope instability factors, loess slope stability of the calculation method and reinforcement measures. This paper adopts the theory of Morgenstern-Price to analyzing the stability of the slope, referencing with Sweden finite slice method, Simplified Bishop method, Simplify Janbu method. The reinforcement adopts the technology of possessed anchor to disposing the loess slope, and has good Practice effect. The loess slope stability study area has a large reference.

Evaluation of Mining Activities Using a Scenario Interview Approach

1998 ◽  
Vol 42 (15) ◽  
pp. 1108-1112
Author(s):  
Fred Turin ◽  
Lisa Steiner ◽  
Kim Cornelius
Keyword(s):  
Underground Mining ◽  
Mining Machine ◽  
Mining Activities ◽  
Underground Coal Mining ◽  
Safety Issues ◽  
Safe Work ◽  
Mining Conditions ◽  
Continuous Mining ◽  
Machine Operator ◽  
Scenario Approach

NIOSH researchers have been examining underground coal mining activities in order to evaluate work crew hazards. In 1994 a continuous mining machine operator was killed by falling roof during extended cut mining. Many aspects of the incident were used by NIOSH researchers to develop a scenario interview. The goal was to provide a realistic framework for acquiring frank and detailed insights. The interview consists of two sections. The first describes the underground mining conditions. The second recounts the fatal incident. Each section is supplemented by a diagram and a set of questions addressing relevant safety issues. The interview was administered at three mines that actively take extended cuts. Researchers found the scenario approach to be an effective interview tool as well as an effective hazard awareness and safe work practices training platform.

Study of a New Real-Time Monitoring Method on the Underground Mining Activities

2012 ◽  
Vol 229-231 ◽  
pp. 1402-1405
Author(s):  
Xiu Zhi Meng ◽  
Zeng Zhi Zhang ◽  
Zong Sheng Wang
Keyword(s):  
Real Time ◽  
Underground Mining ◽  
Energy Eigenvalue ◽  
Mining Area ◽  
P Wave ◽  
Signal Acquisition ◽  
Mining Activities ◽  
Real Time Monitoring ◽  
P Waves ◽  
Monitoring Method

This paper presents a new real-time monitoring method based on the explosion source location technique on the underground mining activities in the situation the state can not achieve the full uninterrupted supervision because of the backward monitoring tools and equipment. The supervise mode results in some small coal mines in the profit-driven to ultra-layer or cross-border mining which causes a many of safety accidents. The five acceleration vibration sensors buried underground in the mining area pick up blasting vibration waves coming from blasting tunneling. Every signal acquisition sub-station deals with the according sensor output signals by using wavelet transform to identify the P waves and using energy eigenvalue method to determine the arriving time of P wave to the sensor, then translates the sensor’s spatial and temporal parameters to the principal computer. The principal computer locates the explosion source by the Geiger algorithm and displays the explosion source’s spatial message in the mine’s electronic map. The method is feasible and the positioning horizontal error is less than 10m by field-proven.

scholarly journals Shifts of Trigonometric Points in the area affected by Mining Activities / Posuny Trigonometrických Bodů Na Území Ovlivněném Hornickou Činností

2011 ◽  
Vol 57 (3) ◽  
pp. 63-72
Author(s):  
Marek Mikoláš ◽  
Milan Mikoláš ◽  
Petra Zápalková
Keyword(s):  
Underground Mining ◽  
Mining Activities ◽  
Horizontal Shift ◽  
Area Of Interest

Abstract In the underground mining of deposits, except the subsidence of layers also a horizontal shift occurs. The shift of trigonometric points is detected by the renewal of network. Formerly, the new triangulation of the overall area of interest has been carried out and since 1991 with the onset of modern observation techniques the GNSS technology has been used in full, which is not so time-consuming and economically demanding as triangulation works.

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