Parallel digging, mining and filling operation coal mining method for controlling overlaying strata fracture and surface subsidence

Inactive Publication Date: 2018-07-12
CHINA UNIV OF MINING & TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Existing water-preserved mining techniques have a poor mining ratio, or can't attain a good water preservation effect, or don't have high recovery efficiency owing to the filling method.
Coordinated mining utilizes the counter balancing among surface deformations resulted from simultaneous mining at multiple working faces to attain the purpose of reducing surface deformation, but it involves simultaneous mining at multiple working faces and is constrained

Method used

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  • Parallel digging, mining and filling operation coal mining method for controlling overlaying strata fracture and surface subsidence
  • Parallel digging, mining and filling operation coal mining method for controlling overlaying strata fracture and surface subsidence
  • Parallel digging, mining and filling operation coal mining method for controlling overlaying strata fracture and surface subsidence

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Embodiment Construction

[0036]Hereunder the present invention will be further detailed in an embodiment, with reference to the accompanying drawings. The parallel digging, mining and filling operation coal mining method for controlling overlaying strata fracture and surface subsidence provided in the present invention includes the following steps:[0037]a. as shown in FIG. 1, a stope haulage roadway I 1 is arranged along the edge part of a stope, and a stope branch roadway I 2 is dug perpendicularly or obliquely to the stope haulage roadway I 1; or, a stope haulage roadway I 1 can be arranged in the middle of the stope directly, and a stope branch roadway I 2 is arrange at each side of the stope haulage roadway I 1.[0038]b. then, performing multiple two-winged adits mining in the coal mass along the stope branch roadway I 2 from inner side to outer side; the included angle α between the direction perpendicular to stope branch roadway I 2 and the two-winged adit 3 shall meet the requirement of turning of the...

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Abstract

Disclosed is a parallel digging, mining and filling operation coal mining method, in which a stope haulage roadway, stope branch roadways, and two-winged adits are arranged in a stope. The stope haulage roadway and the stope branch roadways serve as haulage passages, and coal mining work is carried out in the two-winged adits. All two-winged adits are mined sequentially and filled timely, and coal mass that has not been mined or two-winged adits that have been filled always exist at the two sides of the two-winged adit that are being mined, to support and control the roof. The two-winged adits can be mined without support or with less supports by controlling the length of the two-winged adits and the number of two-winged adits filled in one time, whereupon pillar-free mining can be realized.

Description

FIELD OF THE INVENTION[0001]The present invention relates to a coal mining method, belongs to the field of coal mining technology, and particularly relates to a parallel digging, mining arid filling operation coal mining method for controlling overlaying strata fracture and surface subsidence.BACKGROUND OF THE INVENTION[0002]Water-preserved mining refers to mining by a reasonable coal mining method and process, so as to ensure the mining disturbance will not cause damage to the water-bearing structure in the water bearing strata; or ensure the water level in the water bearing strata can recover within a certain time period though the water-bearing structure is damaged to some degree and some water loss occurs; or ensure the normal water supply will not be affected and at least the water supply can meet the demand of the ground ecosystem for water resource even though the underground water level can't recover to the original level.[0003]Existing water-preserved mining techniques have...

Claims

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Application Information

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IPC IPC(8): E21C41/16E21F15/00
CPCE21C41/16E21F15/00
Inventor MA, LIQIANGMIAO, QIANKUN
Owner CHINA UNIV OF MINING & TECH
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