A strip-fill mining method for extra-thick coal seams relying on steel formwork trolleys

Abstract

The invention discloses an extra-thick coal seam strip-type filling and mining method relying on steel mould trolleys. The extra-thick seam strip-type filling and mining method is used for 'three-under' extra-thick coal seam mining. After coal seam mining, an upper layer hard roof forms a cantilever plate structure, under the cover of the stable cantilever structure, a row of steel mould trolleys arranged parallel to the stope face jointly form a strip filling template to fill a goaf closely adjacent to the stope face. According to the extra-thick coal seam strip-type filling and mining method, the traditional steel mould trolley for tunnel lining is modified, the construction technology is simplified, the planned filling space of the goaf is filled at full height at one time, and false roof laying of slicing filling is avoided; a partition wall is not needed to be constructed, partial filling can be achieved, and filling materials are saved; a mode of combining filling and mining is adopted, filling and mining are pushed forwards simultaneously, coal pillars are not needed to be reserved and arranged, secondary disturbance caused by recovering the coal pillars is avoided, the subsidence of an overlying rock is strictly controlled, and the safety of ground buildings is ensured; and standardized and high modular steel mould trolleys are selected, and can be adapted to filling spaces with various sections and reused.

Description

technical field [0001] The invention relates to a strip-type filling mining method of an extra-thick coal seam relying on a steel mold trolley, in particular to a mining method of strip-type filling of an extra-thick coal seam under the condition of "three-down" coal pressing, which belongs to the coal mining technology field. Background technique [0002] The "three lower" coal seam mining is a special mining difficulty. Scholars at home and abroad have achieved good results in the research on the "three lower" thin coal seam mining, but there is currently no A better solution, lack of cost-effective and effective control methods for surface settlement control, common construction problems caused by laying false roofs, and problems such as increased lifting and transportation volume caused by a large amount of gangue filling, these problems will cause filling The problem of rising costs. At this stage, it is imminent to propose a method that is cost-effective and can reas...

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Problems solved by technology

[0004] The present invention aims to provide a method for mechanized strip filling mining of extra-thick coal seams by using a steel formwork trolley, using a steel formwork trolley similar to tunnel lining and existing paste filling materials to carry out strip filling mining, solving the problem of The problems of low efficiency and high cost brought about by the mechanization and low degree of modernization of "three down" extra-thick coal seam filling mining

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