Comprehensive coal mining method

A coal mining method and comprehensive technology, which can be used in surface mining, mining equipment, earthwork drilling, etc., can solve the problems of many technical managers and technical jobs, small coal mining safety factor, and more floating coal in the goaf. , to achieve the effect of less technical work, high coal recovery rate, and prevention of large-scale roof fall

Inactive Publication Date: 2009-06-03
段连权
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  • Abstract
  • Description
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Problems solved by technology

[0003] At present, the coal mining technology in Ordos and other areas is mostly room type mining, which has the disadvantages of small coal mining safety factor, low recovery rate, and many floating coals in the goaf; Continuous Coal Mining Machine Room Pillar Short-wall Mechanized Coal Mining Method", but due to the high initial investment cost and high mechanization intensity of this method, more technical management personnel and technical types of work are required. Reasons (such as power supply system, water supply system, whether the mine field area is regular, equipment investment, production and sales conditions, technical strength, etc.), most mines cannot be invested in the continuous coal mining machine room column type short-wall mechanized coal mining method and the long-wall type proposed by the government. mining

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Embodiment 1

[0034] Embodiment 1: Geological overview: average coal seam thickness 2.2 meters, mining height 2.0 meters; horizontal coal seam; low gas; direct roof is hard sandstone, sandy shale; no false roof; no water spray.

[0035] The comprehensive coal mining method includes the following steps: (1), coal digging room, (2) back mining coal pillar;

[0036] Among them (1), coal excavation room: firstly, a series of coal rooms with a width of 5 meters are excavated in parallel transport chute and return air chute in the cut hole of the working face prepared in the mining area, and the height of the coal room is 2m. As a short working face forward, the coal room is connected with a connecting roadway to form a production system, forming a massive coal pillar with a width of 4 meters and a height of 2 meters. Coal mining is carried out in the coal room, and then the coal that has been mined Anchor rods shall be drilled on the roofs of houses and connecting lanes, and the bolts shall be m...

Embodiment 2

[0043] Embodiment 2: Geological general situation: average thickness of coal seam is 7.5 meters, mining height is 3.5 meters; horizontal coal seam; low gas; direct roof is sandy mudstone, sandy shale; no old roof; no water spray.

[0044] The comprehensive coal mining method includes the following steps:

[0045] (1), coal digging room, (2) mining coal pillar;

[0046] Among them (1), coal digging room: firstly, a series of coal rooms with a width of 5.5 meters are excavated in the cut hole of the prepared working face in the mining area in parallel with the transport channel and the air return channel, and the height of the coal room is 3.5 m . As a short working face forward, the coal room is connected with a connecting roadway to form a production system, forming a massive coal pillar with a width of 5 meters and a height of 3.5 meters. Coal mining is carried out in the coal room, and then the coal that has been mined Anchor bolts are installed on the roof of the building...

Embodiment 3

[0053] Embodiment 3: Geological general situation: average thickness of coal seam is 4.2 meters, mining height is 3.8 meters; horizontal coal seam; low gas; direct roof is sandy mudstone, sandy shale; old roof is arranged; no watering.

[0054] The comprehensive coal mining method includes the following steps:

[0055] Among them (1), coal digging room: firstly, a series of coal rooms with a width of 6 meters are excavated in the cut hole of the prepared working face in the mining area in parallel with the transport channel and the air return channel, and the height of the coal room is 3.8 m As a short working face forward, the coal room is connected with a connecting roadway to form a production system, forming a massive coal pillar with a width of 5 meters and a height of 3.8 meters. Coal mining is carried out in the coal room, and then the coal that has been mined Anchor bolts are installed on the roof of the building and the connecting roadway; the coal mining and the coal...

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Abstract

The comprehensive coal mining process includes the following steps: 1. cutting coal room and mining coal alternately while maintaining mining distance over two rows of coal pillars; and 2. abstracting coal pillar through mounting pit prop, coal falling, mounting rock bolt, filling coal and transporting coal, and prop pulling, caving roof and breaking coal pillar. The coal mining process has the advantages of production safety, being reasonable and economic, high coal recovery rate, etc.

Description

Technical field: [0001] The invention relates to a comprehensive coal mining method, in particular to a comprehensive coal mining method capable of fully recovering coal pillars and recovering top coal. Background technique: [0002] Yulin area, Ordos area and other areas are rich in underground coal resource reserves, and the coal seam occurrence conditions are superior, shallow burial, monocline structure, dip angle 1-3 degrees, wide and gentle undulations, faults and folds are not developed in the area, and it is a simple structural area . The coal seam is stable, the coal quality is good, the gas content is low, and the water inflow is small. [0003] At present, the coal mining technology in Ordos and other areas is mostly room type mining, which has the disadvantages of small coal mining safety factor, low recovery rate, and many floating coals in the goaf; Continuous Coal Mining Machine Room Pillar Short-wall Mechanized Coal Mining Method", but due to the high initi...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): E21C41/18E21D15/00E21D21/00
Inventor 段连权
Owner 段连权
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