Abstract
Aiming at the mining seam with large burial depth, strong geostress, large deformation of the roadway, and fast deformation speed, in order to efficiently recover the coal resources at the working face and effectively protect the surface buildings. Based on analyse of the law of the appearance of the underground roadway pressure in the relevant working face, combined with continuous miner mining technology and equipment technical characteristics, this paper proposes to use a combination of continuous miner mining technology and backfilling technology to mine under high geostress geological conditions. And optimize the mining process parameters according to the field application. The results show that the continuous mining miner with backfilling method can achieve the efficient recovery of coal resources under high geostress and complex conditions.
Highlights
Continuous miner mining technology has been successfully promoted in mining areas where the pressure of the mine is not obvious, and in combination with fluid backfilling methods such as paste filling under good geological conditions has been applied
In order to effectively protect the surface buildings and obtain good mining results, based on the analysis of the appearance pressure of the roadway in this working face, and the control principle of the deformation mechanism of the surrounding rock, this paper has studied the mining technology combining continuous miner mining and backfilling under high geostress geological conditions, and achieved good results
The downhole elevation of the 2-4 working face is from -730 to -820m, which belongs to the deep mining area
Summary
Continuous miner mining technology has been successfully promoted in mining areas where the pressure of the mine is not obvious, and in combination with fluid backfilling methods such as paste filling under good geological conditions has been applied. Many scholars have conducted in-depth research on the deformation mechanism and control technology of surrounding rock in roadways under high geostress geological conditions [2,3], and the control theory and technology of backfill mining [4,5]. In order to effectively protect the surface buildings and obtain good mining results, based on the analysis of the appearance pressure of the roadway in this working face, and the control principle of the deformation mechanism of the surrounding rock, this paper has studied the mining technology combining continuous miner mining and backfilling under high geostress geological conditions, and achieved good results. The hydrological and geological structure of the mine is relatively complicated, with faults developed, and the mine is a low-gas mine
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