Intermittent mining method

A coal mining method and intermittent technology, which is applied in ground mining, earth drilling, underground mining, etc., can solve the problems of uneconomical mining equipment, only 50% of the mining equipment, and large investment in equipment, so as to achieve obvious water retention effect and save energy. The effect of high cost and recovery rate

Inactive Publication Date: 2013-06-12
白如鸿
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Problems solved by technology

[0002] The existing coal mining methods are roughly divided into two types. One is the room-and-pillar mining method, that is, the coal in the roadway is not completely mined during mining. Generally, 50% of the coal is mined and 50% of the coal is left. As a coal pillar to support the upper roof of the coal seam, the recovery rate of this method is low, and the highest can only reach 50%; It is necessary to purchase a large number of hy

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Embodiment Construction

[0039] Such as figure 1 , figure 2 and image 3 A kind of intermittent coal mining method shown, comprises the following steps:

[0040] Step 1. Preparatory work before mining:

[0041] 101. According to the geological survey report and mining design, the mineable range of the coal seam is determined, and the mineable range is divided into a plurality of mining areas 12, and the main transportation road 2 and the return air road 1 are excavated on one side of the mining area 12. Both the main transportation roadway 2 and the air return roadway 1 are perpendicular to the extension direction of the mining area 12;

[0042] 102. On the mining area 12 and along the extension direction of the mining area 12, excavate the air intake slot 4, the return air slot 9 and the transport slot 7, the transport slot 7 is located between the intake slot 4 and the return slot Between the slots 9, on the side of the mining area 12 and away from the main transportation roadway 2, excavate a ...

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Abstract

The invention discloses an intermittent mining method. The intermittent mining method comprises the steps of step 1. preparation work before mining; step 2. roof supporting; and step 3. coal seam mining, wherein in the step 3 of coal seam mining, a coal seam between a coal face I and a first preliminary open-off cut and a coal seam between a coal face II and a second preliminary open-off cut are reserved as coal pillars used for supporting a roof. The intermittent mining method provided by the invention can be used for greatly improving the recovery rate of coal seam mining, and simultaneously ensuring the safety in production.

Description

technical field [0001] The invention relates to a coal mining method, in particular to an intermittent coal mining method. Background technique [0002] The existing coal mining methods are roughly divided into two types. One is the room-and-pillar coal mining method, that is, the coal in the roadway is not completely mined during mining. Generally, 50% of the coal is mined and 50% of the coal is left. As a coal pillar to support the upper roof of the coal seam, the recovery rate of this method is low, and the highest can only reach 50%; It is necessary to purchase a large number of hydraulic supports. Due to the high price of such hydraulic supports, the cost of coal seam mining is increased, and the fully mechanized coal mining method requires a large investment in equipment when mining coal seams. For small and medium-sized coal mines, the investment is expensive. Advanced mining equipment is extremely uneconomical, and the fully mechanized coal mining method has great l...

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Application Information

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IPC IPC(8): E21C41/16
Inventor 白如鸿郝君范立民
Owner 白如鸿
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