Blasting mining to fully mechanized mining process of deeply inclined coal seam breaking roof

Abstract

The invention discloses a blasting mining to fully mechanized mining process of a deeply inclined coal seam breaking roof. The process is composed of a blasting mining process phase and a blasting mining to fully mechanized mining process phase. The blasting mining process phase is composed of determination of basic mining setting, blasting mining, support of a mining working surface and goaf treatment; the blasting mining to fully mechanized mining process phase comprises a tunnel slope expansion process and a supporting treatment process on a tunnel roof. By setting a process flow, blasting mining can be adopted for a plurality of months under the condition that fully mechanized mining equipment cannot be started on time (for example, the fully mechanized mining equipment cannot be mounted immediately), and additional 2 to 4 ten thousand tons of coal can be averagely produced and about ten million yuan can be increased. A blasting mining working surface is directly expanded into fully mechanized mining open-off cut and a safety coal pillar does not need to be reserved, so that the recycling rate of coal resources is greatly improved; compared with newly dug open-off cut, 20m or more of the coal pillar can be reduced, additional 1.0 ten thousand tons of the coal or more can be recycled and 3.5 million yuan or more is directly earned.

Description

technical field [0001] The invention relates to the technical field of coal mine mining, in particular to a fully mechanized blast mining-to-fully-mechanized mining technology under the condition of a broken roof belt in a coal seam with a large dip angle. Background technique [0002] Fully mechanized mining technology is the development direction of coal mining. The development of fully mechanized mining technology means the mechanization of coal dropping, coal loading, coal transportation and roof support. Fully mechanized mining can significantly improve production efficiency and safety status. However, with the gradual improvement of the mechanization level of fully mechanized mining and fully mechanized excavation, the layout of fully mechanized coal mining face is difficult, the coal mining face is short, and the disadvantages of frequent relocation are becoming increasingly prominent. [0003] At present, under the domestic coal mining conditions, due to a system of ...

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Problems solved by technology

[0005] (1) The cutting hole is carried out after all the blasting coal mining faces are withdrawn, which wastes a lot of manpower and material resources, and does not guarantee the continuity of production

[0006] (2) In today's increasingly tense energy environment, opening another eye not only reduces production efficiency, but also wastes resources

[0007] (3) As the production proceeds, the residual coal pillars will leave potential safety hazards and affect production

[0009] (1) The roof of the roadway is suspended in a large area, which increases the risk of roof fracture and collapse, and brings difficulties to the roadway support

[0010] (2) Blast mining is used before cutting, and the impact and disturbance effect of blast mining is strong, which increases the degree of roof fragmentation, and the roof is extremely difficult to manage, which again increases the risk of roof breakage and collapse

[0011] (3) The roof in the cut-out space becomes a large-span cantilever roof, and the length of the cantilever is much larger than that of the general gob-side roadway, and the middle part of the roadway section is prone to fracture; the separation phenomenon caused by the asynchronous movement of the upper and lower rock masses ; The problem of plastic failure of the surrounding rock due to the concentration of stress at the coal wall

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