Method for the controlled maintaining of a distance between the roof and the face in longwall mining operations

A technology for coal mining face and operation, which is applied in the field of longwall mining operations, and can solve the problems of inability to cover the support to support the overlying layer and the like.

Active Publication Date: 2011-01-19
BEIJING TIANMA INTELLIGENT CONTROL TECH CO LTD +1
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  • Summary
  • Abstract
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  • Application Information

AI Technical Summary

Problems solved by technology

If the front drum, which is usually leading in the direction of travel of the shearer, cuts the upper layer of the coal seam (Oberbank) and exposes the overlying layer, then the cover support can only advance behind the forward shearer a certain distance, so that the overlying layer cannot be supported by cover supports in this area

Method used

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  • Method for the controlled maintaining of a distance between the roof and the face in longwall mining operations
  • Method for the controlled maintaining of a distance between the roof and the face in longwall mining operations
  • Method for the controlled maintaining of a distance between the roof and the face in longwall mining operations

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Embodiment Construction

[0032] exist figure 1 The longwall equipment shown in includes firstly a cover support frame 10 with a bottom slide 11 on which two struts 12 are arranged in parallel, figure 1 Only one of the columns can be seen in FIG. 2 and these support the top beam 13 at their upper ends. When the top beam 13 stretched out along the direction of the shearer to be explained on its front (left) end, the goaf shield frame 14 was hinged on the right rear end of the top beam 13 by means of a hinge 15, wherein the goaf The field shield is supported by two support guides 16 supported on the bottom carriage 11 in side view. In the illustrated embodiment, three inclination sensors 17 are installed on the shield support frame 10, more precisely, one inclination sensor 17 is installed on the bottom carriage 11, and one inclination sensor 17 is installed on the top beam 13 near the hinge 15. In the rear area and an inclination sensor 17 is arranged on the goaf shield frame 14 . It is not further s...

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Abstract

Disclosed is a method for the controlled maintaining of a mechanically favorable distance (33) between the roof and the face in longwall coal mining operations comprising a face conveyor (20), at least one extraction machine (22), and a hydraulic shield support. In said method, the inclination of the top canopy (13) and the floor skid (11) in the mining direction is determined by means of inclination sensors (17) mounted on at least three of the four main components of each shield support frame (10), such as the floor skid (11), the gob shield (14), the supporting connection rods (16), and in the gob zone of the top canopy (13), the effects on the distance (33) between the roof and the face are determined in a computer unit on the basis of the measured data when the angle of inclination of the top canopy (13) changes, and the parameters that are crucial for the working cycle of the shield support frame (10) are automatically adjusted, said working cycle consisting of a retracting, advancing, and setting process.

Description

technical field [0001] The invention relates to a method for controlling a longwall mining operation with a face conveyor, at least one shearer and hydraulic shield supports in underground coal mining. Background technique [0002] Furthermore, the problem of automating the longwall control is to know the distance from the top beam to the coal face, which is hereinafter referred to as "KaKo" for short. In underground coal mining, it is usually aimed at supporting the overlying layer as soon as possible after the overlying layer is exposed by means of corresponding supports, in order to reduce the presence of the overlying layer due to geomechanics in the unsupported area Risk of collapse. In longwall mining operations, unsupported overburden is bound to occur based on the sequence of operations during mining. Therefore, for example, when using a roller shearer for cutting mining, the shield bracket must first of all keep such a distance from the coal mining face on the end...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): E21C35/24E21C41/16E21D23/00E21D23/03
CPCE21C35/24E21C41/16E21D23/0034E21D23/0004E21D23/03
Inventor M·容克尔A·莫扎尔
Owner BEIJING TIANMA INTELLIGENT CONTROL TECH CO LTD
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