Gold mining machinery includes a variety of equipment that is used to extract gold from the earth. The specific type of machinery required depends on the method of mining being employed, such as placer mining, which extracts gold from stream sediments, or hard rock mining, which involves extracting gold from vein deposits in rock. Below are some common types of gold mining machinery:

　　1. **Draglines**: These are large machines used to remove the top layers of soil and rock to expose the gold-bearing layers underneath.

　　2. **Excavators**: These heavy machines are used for digging and moving large amounts of earth. They can be fitted with a variety of attachments such as buckets, grabs, or hydraulic hammers.

　　3. **Dump Trucks**: These are used to transport the earth and rock removed by excavators and draglines to the processing facility or waste piles.

　　4. **Graders**: These machines are used to create and maintain the roads that are used by the mining vehicles.

　　5. ** Crushers**: Crushers are used to break down the hard rock into smaller pieces so that the gold can be extracted more easily.

　　6. **Ball Mills**: These machines are used to grind the crushed rock down to a fine powder so that the gold can be separated from the rock.

　　7. **Jigs**: These are gravity separators that separate gold from other heavy minerals in the ore.

　　8. **Sluice Boxes**: These are simple devices that use water to wash gold from the gravel and sand.

　　9. **Shaking Tables**: These are used to separate gold from other materials by using a shaking motion that allows the gold to settle to the bottom of the table.

　　10. **Centrifuges**: These machines use centrifugal force to separate gold from other materials in the ore.

　　11. **Gold Panning Equipment**: Simple equipment used by placer miners to manually separate gold from gravel and sand.

　　12. **Dredges**: These are floating platforms equipped with excavation equipment, such as a bucket ladder or a suction dredge, which are used to remove material from underwater placer deposits.

　　13. **Hydraulic Machines**: These use high-pressure water jets to erode the soil and rock and expose the gold-bearing material.

　　14. **Recovery Equipment**: This includes devices such as gold concentrators, jigs, and shaker tables that are used to recover the gold from the ore after it has been processed.

　　15. **Safety Equipment**: Safety is paramount in mining operations, so personal protective equipment (PPE) like helmets, gloves, and safety glasses, as well as environmental controls and monitoring equipment, are also essential.

　　Gold mining is a complex and potentially dangerous operation, and the machinery used must be selected and operated with care to maximize efficiency and minimize environmental impact. Regulations and safety standards are also an integral part of the mining process.