CN102071936A

CN102071936A - Roller internal rotation coal cutting method of thin coal seam roller coal cutter

Info

Publication number: CN102071936A
Application number: CN2010106043318A
Authority: CN
Inventors: 徐冉忠; 林柏泉; 张学军; 杨威; 师永贵; 安赛; 孙辉合; 陈武选
Original assignee: China University of Mining and Technology Beijing CUMTB; Shaanxi Coal Mining Hancheng Mining Co Ltd
Current assignee: China University of Mining and Technology Beijing CUMTB; Shaanxi Coal Mining Hancheng Mining Co Ltd
Priority date: 2010-12-24
Filing date: 2010-12-24
Publication date: 2011-05-25

Abstract

The utility model relates to an internal rotary coal cutting method of a thin coal seam drum shearer, which is most suitable for extremely unstable thin coal seam mining. The internal rotation of the drum shearer can be obtained by reversing the installation of the left and right drums on the rocker arm of the conventional drum shearer, and exchanging any two phases of the three-phase electric phase sequence in the cutting motor wiring cavity of the drum shearer. coal cutting method. In the process of coal mining of extremely unstable thin coal seams, the drum of the roller shearer is changed from the original coal seam tangential to the rock layer to the rock layer tangential to the coal seam, which can effectively reduce dust and improve the working environment; increase the degree of material classification and improve the clean coal Recovery rate; reduce body vibration, reduce equipment failure rate, and improve mining efficiency. The method is simple, convenient to operate, good in use effect, improves the coal mining speed and reduces the labor intensity.

Description

The cylinder inward turning coal cutting method of girdle flitting

Technical field

The present invention relates to a kind of coal cutting method of flitting, especially a kind of cylinder inward turning coal cutting method that is applicable to the flitting of extremely unstable girdle.

Background technology

Coal and gas are outstanding to be the matter of utmost importance that seriously restricts Coal Production.Exploitation protection zone property outburst prevention measures is the outstanding comparatively effective method of control coal and gas.When the protection coal seam belongs to extremely unstable girdle, how to accelerate to protect the exploitation fltting speed in coal seam, become ore deposit factory production distribution and adjusted subject matter with development.Under the digging condition of extremely unstable girdle.Mining height is less than 1.3 meters, and the coal seam average thickness is less than 0.8 meter, 1.2 meters of coal machine cylinder diameters.At present, the fully-mechanized mining working of extremely unstable girdle generally adopts flitting cylinder outward turning coal cutting mode, because during the outward turning coal cutting, flitting cylinder pick is to cut to competent bed by soft coal seam, so rib to the reaction force of cylinder upwards can cause the flitting crank, the vibrations that produce are big, coal of being exploited out and the rock dustization of thereupon adopting, the block ratio has only 40%, causes not only that working environment is seriously polluted, the cleaned coal efficiency of separation.In production application, had a strong impact on the mining progress of fully mechanized coal face.For the production requirement that guarantees ore deposit factory is badly in need of taking corresponding measure or method to solve this practical challenges.

Summary of the invention

The objective of the invention is to overcome the weak point in the prior art, a kind of cylinder inward turning coal cutting method of simple, safe and reliable, girdle flitting that lump coal rate is high is provided.

The cylinder inward turning coal cutting method of girdle flitting of the present invention:

A. arrange flitting at the open-off cut place, extremely unstable girdle zone of pre-exploitation, left and right sides cylinder commutation on the rocking arm of the existing flitting left and right sides is installed, the cylinder that is about on the rocking arm of former flitting left side is installed on the right side rocking arm of flitting, and the cylinder on the rocking arm of flitting right side is installed on the left side rocking arm of flitting;

B. any two-phase transposing in the three-phase electricity phase sequence in the cutting motor wire connection cavity of flitting is connected, the left and right sides cylinder on the rocking arm of the flitting left and right sides is counterclockwise rotated;

C. finish the coal cutting of cylinder inward turning according to the mining way of existing flitting.

Beneficial effect: because the coal seam has frangible preferably compressibilty, left and right sides cylinder commutation on the flitting rocking arm is installed, allow the cylinder reverse rotation of flitting, during exploitation, the cylinder pick is cut to soft coal seam by hard entity rock, rock moves to the coal body extruding and forms block, greatly reduce the dust formation degree of rock coal, improved the worker laboring environment, the block ratio significantly improves, the block ratio is increased to 80%, and clean coal recovery improves about 20%.Because rock mass is downward to the reaction force of flitting, therefore the flitting fuselage can operate steadily, vibratory output obviously reduces, therefore equipment failure rate reduces greatly, greatly improved the coal mining speed of flitting, compared with prior art, the coal mining speed of flitting has improved more than 5%.Its method is simple, easy to operate, effect is remarkable.

Description of drawings

Fig. 1 is the coal cutting structural representation of flitting outward turning in coal seam in the prior art.

Fig. 2 shows the structure intention for flitting inward turning of the present invention coal cutting.

Fig. 3 is an intermediate roll coal-winning machine drive motors wire connection cavity wiring schematic diagram of the present invention.

Among the figure: 1-cutting motor wire connection cavity, 2-three-phase electricity phase sequence, 3-cylinder, 4-coal seam, 5-rock stratum, 6-rocking arm.

The specific embodiment

The invention will be further described below in conjunction with the embodiment in the accompanying drawing:

As shown in Figure 2, the coal cutting method of girdle flitting inward turning of the present invention is the direction of rotation that changes flitting cylinder 3 on the basis of existing flitting, flitting is installed by existing mode by open-off cut place, extremely unstable girdle zone in pre-exploitation, left and right sides cylinder 3 commutations that will have during installation on the left and right sides rocking arm 6 of flitting are installed, be that the cylinder on the rocking arm is installed on the right side rocking arm of flitting on the left of the former flitting, flitting rocking arm right side cylinder is installed on the rocking arm of flitting left side; Before the flitting operation, any two-phase transposing in the three-phase electricity phase sequence 2 in the cutting motor wire connection cavity 1 of flitting is connected, as shown in Figure 3, make left and right sides cylinder 3 rotation counterclockwise on the flitting rocking arm 6.During flitting work, the entity rock stratum 5 that cylinder 3 first cuts are hard, cut to soft coal seam 4 by hard entity rock stratum 5 again, because coal seam 4 has frangible preferably compressibilty, rock stratum 5 is moved to coal seam 4 extruding and is formed block, greatly reduces the dust rate in rock stratum and coal seam, the reaction force of 5 pairs of cylinders 3 of time-parallel strata is downward, push down the flitting fuselage, can alleviate vibrations, held stationary.

Claims

1. A method of rotary coal cutting in the drum of a thin coal seam drum shearer, comprising the use of a drum shearer, characterized in that:

a. Drum shearer is arranged at the cutting hole in the pre-mined extremely unstable thin coal seam area, and the left and right drums (3) on the left and right rocker arms (6) of the existing drum shearer are reversed and installed, that is, the original drum shearer The drum on the left rocker arm is installed on the right rocker arm of the drum shearer, and the drum on the right rocker arm of the drum shearer is installed on the left rocker arm of the drum shearer;

b. Exchange and connect any two phases of the three-phase electric phase sequence (2) in the cutting motor wiring cavity (1) of the drum shearer, so that the left and right drums (3) on the left and right rocker arms (6) of the drum shearer Rotate counterclockwise;

c. According to the coal mining method of the existing drum shearer, the rotary coal cutting in the drum is completed.