study is presented for a proposed southern African coal mine. OPEN-CAST COAL MINING SURFACE EROSION PROBLEMS Soil erosion and sediment transport depend on the following factors: (a) climatic conditions, (b) soil and spoil erositivity, (c) overland slope and slope length, (d) ground cover, (e) soil conservation control practices, (f) catchment drainage characteristics. Open-cast mining
ABSTRACT Many of the coal deposits of Western Canada exhibit intensely folded and/or faulted strata. Geological evaluation of such deposits is often difficult and uncertain, and interpretations are subject to significant modifications throughout the exploration, development and mining phases. Design and excavation of open pit slopes under such conditions can present a variety of operational
Opencast mining on hill slopes, particularly in areas of heavy rainfall, is vulnerable to landslides causing loss of human life, property and deforestation. This can be controlled by geo-technically designed slope of the mine and adequate support system. (E) Unaesthetic landscape. Mining activity changes the land-use pattern and alters the surface topography by increased surface erosion and
Stability Analysis and Design of Open-Pit Mine Slope in China: A review . Zhiqiang Yang 1, 2, Qian Gao 1, Mao-hui Li 1, Guangcun Zhang 1 1. Key Laboratory of High Efficient Mining and Safety of Metal Mine Ministry of Education, University of Science and Technology Beijing, 100083,Beijing China . 2. Jinchuan Group Co. Ltd., Jinchuang 737100, Gansu Province China
resulting slope design. Let's clarify this interaction. Assume an open pit mine with a substantial overall slope height. Now, assume a bench height of 15m, a required catch bench width of 8m with a stability determined face angle of 70°. Assume the inter-ramp slope has been
ABSTRACT This paper describes the on-going development of an advanced computer system for the assessment of geotechnical risk in surface coal mines. In particular it is concerned with detailing the practical problems and solutions involved in linking computerised geological models, specialist mining software packages arid expert systems when applied to slope stability
Figure 2 shows a comparison of the annual produ ction rates and producti vities of US coal mines. Surface mines have very few limitations on the operation of large machines with high capacity, whereas underground operations are considerably restricted by narrow working spaces and rock conditions. Moreover, less commuting time is required at a surface mine, whereas a
during the mine design process. The rock slope design role often incorporates some degree of risk management, either explicitly or implicitly in the design of pit slopes. Nevertheless, unexpected failures have occurred in the past and continue to do so today. These slope failures motivated the development of the slope stability radar (SSR). The SSR system can detect and alert movements of a
Pit design.General design parameters and planning data• Density of seams, total coal column thickness•Thickness of partings• Gradient• Geological disturbances• Strike lengths, shape of property• Geological Reserves• Surface constraints/adjacent habitat• Dump yards availability with lead and lift• Mining system, optimum mining concept• Depth of operation, mineable reserves
undergraduate and postgraduate Surface Mine Design Engineering courses presented in the Mining Engineering degree programmes at the University of Pretoria. Open-Pit Mine Planning and Design Presented by the Department of Mining Engineering, University of Pretoria. For quotations on in-house training, email
base spoil material are affected by slaking in order to design safe spoil pile slope and height, and a safe dewatering rate. In this study, fresh spoil material collected from a coal mine in the Bowen Basin in Queensland, Australia was subjected to high overburden pressure (0 – 900kPa) under saturated conditions and maintained over a period of time (0 – 6 months) allowing the material to
The Surface Pen and Surface Slim Pen are mighty tools that let you get more done on your Surface PC. To maximize the Surface Pen's ability, there are some essential apps you should check out.
Surface water must also be controlled to allow efficient mining operations. Runoff from the surrounding land surface must be diverted away from the mine, for example by using collector drains and diversion bunds. Within a mine any surface water must be controlled by the drains and sumps to collect the water away from working areas.
This methodology was then applied in the design of a mechanized bord-and-pillar mining layout for a given piece of ground (Vlakpoort and Moddergat) using a given selection of machines. This piece of ground contains the PGM bearing UG2 Reef with an average thickness of 124 cm and dipping at 18° with adverse strike and dip changes. Two bord-and-pillar layouts were designed
Figure 1 A near miss over a drop off at a coal mine in the Hunter Valley . SAFETY BULLETIN 2 . Figure 2 Dozer rolled while reversing at a metalliferous mine . Figure 3 A dozer reversed over a light vehicle at a surface coal mine . Recommendations It is recommended mine operators ensure that: 1. planning minimises a requirement for dozers to work on cross grades 2.
surface mines, coal and non-metal, increased to an alarming rate of seven during 1999. To determine the causes of slope failure and successful mining practices, the National Institute for Occupational Health and Safety undertook a study. The study included: 1. A review of accident statistics; 2. A review of Federal and state mining laws pertaining to surface mining; 3. A
Keywords: Rock excavation, Safety analysis, Slope stability, Surface mining Introduction The geotechnical study and slope design was conducted of an open pit copper mine (500 m long, 200 m wide) situated in Rajasthan, India. The ore body is 40 m wide and 313 m long. The ultimate pit depth is 148 m. The ore body is striking NNW-SSE with an average dip of 65° due west. It
during the mine design process. The rock slope design role often incorporates some degree of risk management, either explicitly or implicitly in the design of pit slopes. Nevertheless, unexpected failures have occurred in the past and continue to do so today. These slope failures motivated the development of the slope stability radar (SSR). The SSR system can detect and alert movements of a
Pit and Surface Mining, Aug. 2001. A geotechnical rationale for the design of South African open cast coal mine highwalls - Open (conventional) wall open cast highwalls - Open cast mines using buffer blasted highwalls. Open (conventional) highwalls—classic soil and rock slope failure of the overburden and interburden. Open cast mines using buffer blasted highwalls— highwall subsidence due
Drilling in mining 1. Introduction to Drilling Technology for Surface Mining Prof. K. Pathak Dept. of Mining Engineering, IIT, Kharagpur-721302 1 Introduction Drilling is the process of making a hole into a hard surface where the length of the hole is very large compared to the diameter.
