Goaf mine filling station

d
The working principle of the filling station is briefly described as follows: d
The emergence of the ground filling station makes it possible to efficiently carry out large-scale concrete projects in coal mines. Coal pillar recovery and other aspects have great use value
First of all, the gangue processing process is to transport the coal gangue produced during the mining process to the vibrating screen through a conveyor for screening. The large pieces of gangue are screened and then enter the crusher for crushing. After crushing, the unqualified gangue will be screened by the vibrating screen again and fed back into the crusher until it is qualified. The qualified gangue will be transported to the batching station of the mixing system by the conveyor together with the previously screened finished gangue.
There is a measuring hopper under the storage silo of the batching station. The gangue calibrated according to the control system can be weighed and then the gangue is transported by the conveyor to the gangue waiting hopper on the upper part of the mixer. At the same time, the cementing material and fly ash are transported by the corresponding spiral. The conveyor transports the powder material to the weighing hopper, and the water is transported to the water weighing hopper by the liquid supply system.
After all the materials are weighed, open the pneumatic door of the gangue waiting hopper and the measuring hopper valves of the other three raw materials in a certain order to let each material enter the mixer and start the mixer to mix evenly. The filling material obtained after stirring enters the filling pump through the discharge door of the mixer through the discharge hopper and the rotating material distribution device to complete a mixing cycle. Finally, the filling pump is controlled to unload the mixed filling material to the filling pump and pump the filling material to the goaf area of the fully mechanized mining face in time.
The ground filling station effectively solves the problem of ground subsidence, which has plagued the coal industry for many years, and realizes Sanxia coal mining. It effectively protects groundwater resources and land resources, can save huge village relocation fees and land subsidence compensation, and can greatly improve coal production. The recovery rate creates huge profits.
By backfilling the goaf, the waste rock and fly ash from previous mining have been consumed, greatly reducing the damage to the environment.
The emergence of ground filling stations makes it possible to carry out efficient large-scale concrete projects underground in coal mines. It has great use value in aspects such as gob retention, back-wall filling, and coal pillar recovery.
The basic procedures for filling system design are: Filling method selection and requirements r Filling material selection r Filling volume determination r Filling material transportation method r Mixing and pulping capacity r Feeding and metering r Filling material preparation and storage scale r System management and control requirements to determine equipment, equipment selection machinery, civil engineering design and installation requirements. Therefore, the filling system design involves multiple professional designs such as mining, electromechanical, civil engineering, and information control, which must be closely coordinated with each other.
The design of the filling system should follow the following principles:
The filling material should be selected nearby to make full use of industrial waste to protect the environment and reduce costs.
Give priority to the self-flow transportation method to reduce infrastructure investment and management costs.
Keep the pulping capacity consistent with the pipeline flow rate and set up necessary manual or automatic control measures to achieve full pipeline transportation as much as possible.
The warehouse scale must ensure normal production without frequent material shortages.
Necessary moisture-proof, rain-proof and snow-proof measures are required to prevent the cement material from absorbing moisture and clumping to maintain a stable moisture content of the filling material.
The process flow and control are simple and practical.
Dust and noise comply with environmental protection requirements.