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High level filling mining method of fully mechanized caving in thick coal seam under railway in coal mine

A thick coal seam and strip technology, applied in the direction of filling, ground mining, mining equipment, etc., to achieve the effect of increasing economic benefits, improving resource recovery rate, and speeding up mining progress

Active Publication Date: 2020-12-04
XINWEN MINING GROUP
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  • Abstract
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Problems solved by technology

[0005] The purpose of the present invention is to solve the problem of safe mining of thick coal seams under coal mine railways, and propose a high-position filling mining method for strips of thick coal seams under coal mine railways

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  • High level filling mining method of fully mechanized caving in thick coal seam under railway in coal mine
  • High level filling mining method of fully mechanized caving in thick coal seam under railway in coal mine
  • High level filling mining method of fully mechanized caving in thick coal seam under railway in coal mine

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Embodiment Construction

[0018] The preferred embodiments of the present invention will be described in detail below in conjunction with the accompanying drawings, so that the advantages and features of the present invention can be more easily understood by those skilled in the art, so as to define the protection scope of the present invention more clearly.

[0019] Such as Figure 1-4 As shown, a coal mine railway under the thick coal seam strip fully mechanized caving high-level filling mining method adopts the strip-type working face mining method, and adopts the comprehensive mechanized top-coal caving process for mining, and also includes the following process steps;

[0020] 1. Before arranging strip work, collect the initial pressing distance of the fully mechanized caving working face near the stope, and use half of the smallest initial pressing distance collected as the inclination length of the strip working face to ensure that the working face will go up after mining The roof covering can b...

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Abstract

The invention discloses a strip fully-mechanized top coal caving high cut and fill mining method of a thick coal seam under a coal mine railway. A strip type working face mining method is adopted; anda fully-mechanized top coal caving technology is adopted for mining. The strip fully-mechanized top coal caving and high-position cut and fill mining method is characterized in that the first weighting distance is taken as the basis of designing the inclination length of a strip type working face; a high filling roadway is constructed before the mining of the working face; a blasthole and a filling drill hole are constructed in the high filling roadway; a top coal area is blasted in advance through the blasthole, and a goaf is filled through the filling drill hole, so that the caving of overlying rocks is reduced, and the ground depression is suppressed; and pressing coal under the railway is converted into recoverable reserves, thus, the recovery rate of resources and the economic benefits are increased, and the length of service of the mine is prolonged.

Description

technical field [0001] The invention relates to coal mining technology, in particular to the "three-down" thick coal seam coal mining technology. Background technique [0002] Coal mining under buildings, water bodies, and railways is called "three under" coal mining. According to Article 60 of the "Code for Coal Pillar Retention and Pressed Coal Mining in Buildings, Water Bodies, Railways and Main Shafts" jointly promulgated by the State Administration of Work Safety, the State Administration of Coal Mine Safety, the National Energy Administration, and the National Railway Administration, the National Second Grade railways (seam lines) are allowed to carry out test mining if they meet the conditions. In order to control ground subsidence after mining and protect ground facilities from being affected, special mining techniques are required. The most important thing in the coal mining technology under the railway is to reduce the amount of surface subsidence, which not only...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): E21C41/18E21F15/00
CPCE21C41/18E21F15/00E21F15/005
Inventor 张殿振耿华峰王东升李先峰刘小龙范文昌
Owner XINWEN MINING GROUP
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