A physicochemical combined roofing method for stope filling

Abstract

The invention provides a physicochemical combined roofing method for stope filling, belonging to the technical field of filling. In this method, firstly, according to the actual production situation of the mine, determine the filling process parameters and the physical and mechanical performance indicators of the filling body, select the appropriate type of expansion agent, the amount of expansion agent added, determine the addition method of the expansion agent, and calculate the expansion rate; secondly, according to the structural parameters of the goaf , establish the structure model of the goaf and the three-dimensional rectangular coordinate system, select the calculation parameters of the topping rate and establish the mathematical model; then according to the established mathematical model of the topping rate, through the comparison of different schemes, determine the number of cutting points and two The distance between the blanking points; finally arrange the pipeline, and perform filling and topping. The method combines the multi-point cutting method (material) and the adding expansion agent method (chemical) to form a high-quality and high-efficiency filling and topping method, which is safe, reliable, low in cost, and can control and adjust the topping rate. Topping work for various mining methods.

Description

technical field [0001] The invention relates to the field of filling technology, in particular to a physical-chemical combined roofing method for stope filling. Background technique [0002] With the continuous development of the industry, the demand for mineral resources has gradually increased. After the underground ores are mined, a large number of goafs are formed, which destroys the stress balance of the original rock and causes deformation and damage to the surrounding rock. Backfill mining is one of the most important technologies in the green mining technology system. Backfilling is an important factor affecting the filling effect of stopes. If the backfilling effect is not good, the exposed area of ​​the stope roof will be too large. When the maximum exposed area of ​​the stope roof is reached or exceeds the allowable maximum exposed area to maintain the stability of the roof, disasters such as roof caving, surrounding rock shards, and backfill collapse will follow...

AI Technical Summary

Problems solved by technology

However, manual roofing is labor-intensive and low in efficiency; although pressurized pumping filling and roofing efficiency is high, it requires a set of special mortar pressurized pumping facilities, which has great limitations; forced caving and roofing will cause ground damage. Local subsidence, not applicable where the surface needs to be protected

Due to the above disadvantages, it may waste a lot of financial and material resources to achieve high-quality filling and topping, and may not achieve the target filling and topping effect

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