Steep-dip sectional extraction integrated top coal caving and coal-mining method

A coal mining method and top-coal caving recovery technology, which is applied to mining equipment, ground mining, mining equipment, etc., can solve the problems of difficult support, large number of tunnels, poor safety, etc., and achieve simple and effective support, reduce Coal seam mining work, the effect of strong adaptability

Active Publication Date: 2018-11-30
HENAN POLYTECHNIC UNIV
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Problems solved by technology

In view of the above method, the excavation work and the coal mining work are separated, the number of excavation roadways is large, the support is difficult, and the safety is poor

Method used

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  • Steep-dip sectional extraction integrated top coal caving and coal-mining method

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Embodiment Construction

[0022] Such as figure 1 Shown, the integrated top-coal caving coal mining method of steeply inclined segmental excavation of the present invention comprises the following steps,

[0023] (1) Select a coal seam with a thickness of 3-4m and a coal seam dip greater than 55° as the coal seam 1 to be mined;

[0024] (2) Divide the coal seam 1 into several mining areas. In one mining area, divide the coal seam 1 into several rectangular sections along the inclination direction of the coal seam 1 in a certain length. The length of each section is 50m. The inclination length of coal seam 1 is 8~10 times the roadway height;

[0025] (3) Mining the lowermost section of the mining area first, arrange the air return roadway 2 and the recovery roadway 3 along the strike length in the upper and lower parts of the section, and arrange the air return roadway 2 and the mining roadway 3 in the left side of the block along the coal seam 1 The first cut roadway 4 is arranged in the inclined dir...

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Abstract

The invention discloses a steep-dip sectional extraction integrated top coal caving and coal-mining method. The steep-dip sectional extraction integrated top coal caving and coal-mining method comprises the following steps: (1) selecting a coal layer; (2) dividing the coal layer into a plurality of mining areas, and dividing one mining area into a plurality of rectangular sub sections in a coal layer tilting direction; (3) mining one sub section on the lowest part of each mining area; (4) performing recovery in a working surface recovery roadway; (5) transferring coal through a reversed loaderand a conveyor after top coal is discharged; (6) mining a coal layer on the second sub section; and (7) discharging top coals for recovery operation on all sub sections in sequence from bottom to topaccording to construction methods of steps (3) to (6). The steep-dip sectional extraction integrated top coal carving and coal-mining method can realize discharging top coals when a coal-mining and heading machine drops out in a process of heading the roadway by the heading machine, effectively improves working efficiency, reduces energy consumption of coal-mining, reduces roadway arrangement, reduces mining cost, and guarantees safe and efficient coal-mining work.

Description

technical field [0001] The invention belongs to the technical field of coal seam mining, and in particular relates to an integrated top-coal caving mining method for steeply inclined segmental mining. Background technique [0002] At present, my country's steeply inclined coal seam reserves account for about 8% of the total coal reserves. Although the proportion is small, 40% of the coal seams in the southern region are steeply inclined coal seams. For the mining of steeply inclined coal seams in my country, the main coal mining methods include horizontal layering and oblique cutting layered mining, steeply inclined coal seam trending longwall mining methods, and horizontal segmental top coal mining methods. In view of the above methods, the excavation work and the coal mining work are separated, the number of excavation roadways is large, the support is difficult, and the safety is poor. Contents of the invention [0003] In order to solve the deficiencies in the prior a...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): E21C41/18E21D15/44E21F1/00E21F17/00
CPCE21C41/18E21D15/44E21F1/006E21F17/00
Inventor 南华曹伟波马光苏发强神文龙
Owner HENAN POLYTECHNIC UNIV
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