Mining and landslides
This is probably the most important mechanism by which river bank materials fail, being significant after a flood as the river level is declining i.
It is also the country where human-triggered fatal landslides are increasing at the highest rate, followed by Pakistan, Myanmar and the Philippines.
Mining and landslides
As you will see from the above, the most recent landslide occurred in a mining camp in Pantukan last Friday, killing 24 people living on the hillside. The researchers identified a total of fatal landslides, excluding those triggered by earthquakes, that occurred around the world between and and caused a total of about 56, deaths. Bryan Lynn adapted his report for Learning English, with additional material from the Associated Press and other sources. When the slope fills with water, the fluid pressure provides the block with buoyancy, reducing the resistance to movement. One threat that is present at every mine is severe weather. He says he thinks the government should have done a better job enforcing orders for people to leave. Journal Reference: Melanie J. It is worth noting however that deadly landslides are not inevitable in mining areas. Heavy rains and floods are so dangerous because they compromise the structure of mines as well as the surrounding environment. This effect can be especially serious when the warmer weather is accompanied by precipitation, which both adds to the groundwater and accelerates the rate of thawing. Any time plate tectonics move the soil that covers them moves with it.
Blanket bans are not sensible, but proper regulation is essential. Worker safety should be a top priority for all mining operations. Miners who stayed in an old bunkhouse were buried in mud after a mountain slope collapsed due to heavy rains on Sept.
Father Edwin Gariguez, executive secretary of Caritas Philippinessaid copies of the book, Peoples Mine Audit: Documented violations and non-compliance of large-scale mining projects in the Philippines, will be distributed to diocesan centers all over the country.
Emergency workers were able to rescue 10 people from the muddy scene. Mining and Quarrying Summary[ edit ] In the majority of cases the main trigger of landslides is heavy or prolonged rainfall. One rainfall event for example in Sri Lanka in May triggered hundreds of landslides, killing people and rendering overpeople temporarily homeless.
The Natural Hazards and Earth System Sciences study highlights that fatal landslides are more common in settlements, along roads, and at sites rich in precious resources. A landslide of this size would have shown creep behaviour prior to failure; at the very least monitoring should have been in place to detect this. The most tragic event identified by the researchers was the Kedarnath landslide in June in India, which resulted in over deaths. This image, included in this news report , shows the landslide and the adjacent hillsides: There is a good gallery of images of the landslide here as well. Groundwater conditions when the river level is stable Groundwater conditions on the falling limb of the hydrograph. Ending the Cycle We agree that mining companies should be responsible for miner rescues, but we also encourage mining companies to be proactive and stop these weather-related incidents from occurring in the first place. Only this time, civilians in the area lost their lives rather than mine employees. The team, who compiled data on over fatal landslides during the year period, also revealed for the first time that landslides resulting from human activity have increased over time. Miners were operating illegally in an area where extracting activities have been suspended since Generally this takes the form of either an exceptional short lived event, such as the passage of a tropical cyclone or even the rainfall associated with a particularly intense thunderstorm or of a long duration rainfall event with lower intensity, such as the cumulative effect of monsoon rainfall in South Asia. Similarly, horizontal accelerations induce a shearing force due to the inertia of the landslide mass during the accelerations.
In addition, in some cases fluid pressures can act down the slope as a result of groundwater flow to provide a hydraulic push to the landslide that further decreases the stability.
Landslides can also be triggered by snowmelt, changes in ground-water levels, and water level changes along coastline and rivers.
This is currently concentrated mainly on the existing landslide site, although attempts may be made to extend this into other areas.
based on 106 review