Different Methods of Mining Coal

Different methods of coal mining are adapted to dig out the natural coal from the earth. Among them, Surface mining method is applied for producing coal of about nearly 40% in the world. The coal deposits are found on the surface of the earth and make the mining easier for the coal-miners. The various types of coal mining are contour, mountaintop removal and strip mining.

Strip mining is adopted in areas, which has leveled landscape. The surface coal is exposed when the earth covering them is removed in strips. When the whole earth concealing is removed from the surface the coal that lay beneath is exposed. They appear in blocks and are usually extracted either by drilling or blasting. Once the strip is free of coal or goes empty, the strip mining process is continued with the next strip that lay adjacent to the former.

The contour mining is used to remove coal from the layer following the contours found along the ridges of a hill or landscape. The commonly used places for this type of mining are areas with rolling to steep terrain. This method may create landslides and erosion troubles. Using the freshly cut overburden to refill the mined areas rectifies these problems. Strip mining has its own limitations and when the process of strip mining reaches a specific stripping ratio, it may not yield you profit when continued.

Mountaintop removal coal mining can be understood by its name. Removing the mountaintops exposes the coal. This method also involves disposing of mining overburden that is associated with mountaintops removal in nearby valleys. This method is a combination of area and contour strip mining methods. This process creates adverse changes in the topography like creating head of hollow hills and filling valleys with mining wastes.

Latest open cast methods can reveal higher proportion of coal deposit than the underground mining methods.

Deep mining or underground mining is applied to dug out coal that lay underneath the surface of the earth. The primary underground mining ways are Continuous, Longwall, Shortwall, Retreat and Blast Mining.

Longwall mining method is adopted for about 50% of underground mining. This method involves a complex machine with a revolving drum that sways mechanically back and forth across the coal deposit. This method yields high production and ensures safety. This method has sensors that can detect the quantity of remaining coal in the seam and robotic controls contribute to the efficiency of the process.

Continuous mining method is applied for about 45% in underground coal mining. The machine used in this method has a huge revolving steel drum that is facilitated with tungsten carbide teeth to extract the coal from the seam.

Blast mining occupies less than 5% of the whole underground mining in USA. Explosives are used to break the coal seam in this method. The extracted coal is collected and transported to the central area using conveyors or shuttle cars.

Shortwall mining covers 1% and the method is somewhat similar to longwall mining. Retreat mining method employs pillar or coal ribs to support the roof of the mine. This is the most dangerous method as it involves risk of falling roofs that might trap or crush the workers in the mine.

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Why Is Bitcoin Cloud Mining the Way Forward?

Cloud mining allows you to access data centre processing capacity and obtain cryptocoins without the need to purchase the right hardware, software, spend money on electricity, maintenance, and so on. The essence of cloud mining is that it allows users to buy the processing power of remote data centres.

The whole cryptocoin production process is carried out in the cloud, which makes cloud mining very useful for those who do not understand all the technical aspects of the process and do not want to run their own software or hardware. If electricity is costly where you live – for example in Germany – then, outsource the mining process in a country where electricity is cheaper, such as the US.

Types of Bitcoin cloud mining:

There are currently three ways to conduct mining in the cloud:

1. Leased mining. Lease of a mining machine hosted by the supplier.

2. Virtually Hosted Mining. Creating a virtual private server and installing your mining software.

3. Renting hash power. Renting a certain amount of hash power, without having a dedicated physical or virtual equipment. (This is by far the most popular method of cloud mining).

What are the advantages of Bitcoin cloud mining?

– Not dealing with the excess heat generated by the machines.

– Avoiding the constant buzz of the fans.

– Not having to pay electricity.

– Not selling your mining equipment when it is no longer profitable.

– No ventilation issues with the equipment, which is usually heated a lot.

– Avoiding possible delays in the delivery of hardware.

What are the disadvantages of Bitcoin cloud mining?

– The possibility of fraud,

– Operations with bitcoins can not be verified

– Unless you like to build your own Bitcoin hash systems, it might be boring.

– Lower profits – Bitcoin cloud mining services carry expenses.

– Bitcoin mining contracts may allow cessation of operations or payments if the Bitcoin price is too low.

– Not being able to change mining software.

Risk of mining in the cloud:

The risk of fraud and mismanagement is prevalent in the world of cloud mining. Investors should only invest if they are comfortable with these risks – as they say, “never invest more than what you are willing to lose.” Research social networks, talk to old clients and ask all the questions you consider appropriate before investing.

Is cloud mining profitable?

The answer to this question depends on some factors that affect the profitability of investments. Cost is the most obvious factor. The service charge covers the cost of electricity, accommodation and hardware. On the other hand, the reputation and reliability of the company is a determining factor due to the prevalence of scams and bankruptcies.

Finally, profitability depends on factors that no company can predict or control: just remember the high volatility of Bitcoin in the last three years. When you buy a mining contract, it is better to assume a constant price for Bitcoin, since your other alternative is to buy bitcoins and wait for the price to rise. Another important factor is the capacity of the entire network, which depends on the number of operations per second. Over the past few years, power has increased exponentially. Its growth will continue to rely on the value of Bitcoin and innovation in the development of integrated circuits for particular applications.

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VT Nonprofit Lender Mulls Life After End of Student Loan Program

The Vermont Student Assistance Corporation (VSAC) was established in 1965 as a public nonprofit agency designed to oversee the issuing of federal education loans to Vermont students. But with the sweeping reforms to the federal student loan program that were passed in 2009, bundled in with the national health care reform bill, VSAC and agencies like it were stripped of their ability to originate new federal education loans.

As of July 1, 2010, all federal parent and college loans are now provided to borrowers directly by the U.S. Department of Education, and VSAC is now facing a staff reduction of nearly two-thirds as it tries to find ways to survive in the age of the Federal Direct Student Loan Program.

The agency had been a lender in the Federal Family Education Loan Program (FFELP), which was discontinued as part of the federal college loan reforms. As part of its lending functions under the FFEL program, VSAC acted as both a lender and servicer of federal college loans.

Under the new world order, with FFELP disbanded, VSAC can still manage (i.e., “service”) all the college loans it had issued in the past, but the agency is no longer able to issue new loans.

Revenues from the repayment of issued loans were used to fund new student loans as well as ongoing financial aid and student loan education programs, so the agency faces a revenue reduction of about 90 percent as its existing loans are repaid.

VSAC still issues a small number of private student loans, non-federal loans funded by VSAC rather than by the Department of Education, but the agency is looking for a new role with the Direct Loan program.

VSAC recently submitted a proposal to the Education Department to service more than the current statutory maximum of 100,000 federal education loans. Under the proposal, the agency is seeking permission to service the student loans of all Vermont students and all non-resident students enrolled at Vermont colleges and universities. Under the new Direct Loan program rules, only four organizations have been authorized so far by the Education Department to service more than the allotted 100,000 federal student loans.

Even if VSAC’s proposal is approved, however, the revenue from servicing the federal direct loans would bring in only a fraction of the revenue the agency once earned as a lender in the FFEL program.

VSAC is also asking the Vermont state legislature to help underwrite its administrative costs by allowing the agency to divert about 7 percent of its $21 million state appropriation from need-based grants and scholarships for students to the agency itself. VSAC is also asking legislators to allow its private student loan borrowers to deduct up to $500 of the interest on its private student loans from their state taxes.

The agency’s future role is unclear and is likely to remain that way until at least April, while it waits for a determination on the expanded servicing of federal college loans made through the Direct Loan program. The state legislature is likely to render a decision more quickly.

But even with its private student loan portfolio, a favorable decision on student loan servicing from Washington, and additional support from the Vermont legislature, VSAC will still need to reduce its budget by about 10 percent a year for the next three years in order to remain solvent.

The agency, which currently employs about 300 people, has already cut about 60 positions through attrition. If the added student loan servicing work doesn’t materialize and legislators don’t agree to support the agency’s administrative costs and financial aid counseling and outreach work, the agency will likely reduce its staff by an additional 200 positions before the start of the next fiscal year.

college loans

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