What is a Quarry?

The mining of the deposit may be performed underground or in the open. Work performed underground without natural lighting is called underground work, and quarries are also called underground quarries. A quarry that is mined under natural light is called an open quarry.

1. Lack of scientific justification and planning for quarry sites and deposits

In urban construction projects, a large amount of

At this stage, most of the small and medium-sized quarries in China are hillside quarries, with an annual production scale of 30,000 to 50,000 tons, the mining range is generally less than 0.01KM ² , and the maximum mining height of the quarry is generally 20-50 meters Due to the small mining boundary permitted by the mining right and the steep original slope of the topography and landform of the stope, if multi-step mining is used, it is difficult to arrange mechanical transportation roads between the steps, which is often not technically feasible. Manual transportation is used in the stope. It needs to be transferred many times, which is obviously unreasonable economically. The small-scale open-air quarry has insufficient natural conditions for multi-step mining, and it is difficult to promote.

Most quarries still use bottom mining and caving mining and pot expansion explosion mining, which is prone to various accidents. In addition, most quarries are still mining on "one side of the slope", and there is no safe rock drilling platform. Operators use safety ropes and safety belts on the slopes for a long time to operate, which is inconvenient for walking and is easy to fall and cause accidents. ^[1]