Drilling Spacing Optimization Design Based on Relationship Between Pre-pumping Time and Extraction Radius

ZHOU Houquan

Safety in Coal Mines > 2016 > 47(4): 150-153.

ZHOU Houquan. Drilling Spacing Optimization Design Based on Relationship Between Pre-pumping Time and Extraction Radius[J]. Safety in Coal Mines, 2016, 47(4): 150-153.

Citation:

ZHOU Houquan. Drilling Spacing Optimization Design Based on Relationship Between Pre-pumping Time and Extraction Radius[J]. Safety in Coal Mines, 2016, 47(4): 150-153.

Citation:

ZHOU Houquan. Drilling Spacing Optimization Design Based on Relationship Between Pre-pumping Time and Extraction Radius[J]. Safety in Coal Mines, 2016, 47(4): 150-153.

Drilling Spacing Optimization Design Based on Relationship Between Pre-pumping Time and Extraction Radius

ZHOU Houquan

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Published Date: April 19, 2016

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Abstract

Abstract

While ensuring gas extraction to meet the requirements before working face mining, to maximally save borehole engineering quantity, by establishing gas extraction radius and pre-pumping time model at working face, and field measurement of the drainage radius, this article analyzes and grasps the dynamic relation between the borehole spacing and pre-pumping time. On the basis of this, in Liyazhuang Mine 2-609 face, borehole spacing is designed for subregional combined with roadway construction speed and working face mining speed. Field application showed that drilling engineering quantity reduced by 27.8%, which still met the requirements of gas extraction.
- gas extraction,
- haulage gateway,
- numerical simulation,
- extraction radius,
- drilling engineering optimization

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