Outburst elimination method for surface drilling coal extraction area

Outburst elimination method for surface drilling coal extraction area

The invention discloses an outburst elimination method for a surface drilling coal extraction area. The outburst elimination method comprises the following steps of (1) directional drilling, (2) mechanical reaming, (3) hydraulic jetting, (4) mechanical reaming, (5) hydraulic jetting, (6) drainage an...

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Hauptverfasser: LI WEIJUN, JIAN HEDA, FENG ANXIANG, CAO TENGFEI, SU MINGJIN, DU LEI, YANG WEI, BI BO, HAN XIAOGANG, TONG QIANXIAN, YE CHUNHUI
Format: Patent
Sprache:chi ; eng
Schlagworte:
EARTH DRILLING
FIXED CONSTRUCTIONS
MINING
MINING OR QUARRYING
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creator LI WEIJUN
JIAN HEDA
FENG ANXIANG
CAO TENGFEI
SU MINGJIN
DU LEI
YANG WEI
BI BO
HAN XIAOGANG
TONG QIANXIAN
YE CHUNHUI
description The invention discloses an outburst elimination method for a surface drilling coal extraction area. The outburst elimination method comprises the following steps of (1) directional drilling, (2) mechanical reaming, (3) hydraulic jetting, (4) mechanical reaming, (5) hydraulic jetting, (6) drainage and pressure relief, (7) hydraulic jetting, (8) mechanical reaming, (9) drainage and pressure relief and (10) anti-reflection extraction sealing. The ground drill hole is drilled to a target position through directional drilling construction, and the coal seeing and stopping condition of the drill hole is accurately recorded; a mechanical power reaming coal extraction drill bit is adopted for sequentially extracting coal from a coal seam top plate to a coal seam bottom plate, the diameter of the mechanical power reaming coal extraction drill bit is gradually increased, and reaming coal extraction is conducted step by step; in order to further improve the coal extraction amount, a hydraulic jet and large-aperture mech
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subjects EARTH DRILLING
FIXED CONSTRUCTIONS
MINING
MINING OR QUARRYING
title Outburst elimination method for surface drilling coal extraction area
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