The evolution of coal permeability is very complex under the influence of coupled multiple
processes. This is the primary motivation why numerous coal permeability models have …

The low gas extraction concentration is one of the main factors that affect the prevention and
control effect of coal and gas outburst. Based on this, the factors of air leakage around the …

The successful pilot testing of depressurization production for natural gas hydrate reservoir
was conducted at Shenhu Area in the South China Sea. However, pressure changes due to …

Although a series of hypotheses have been proposed, the mechanism underlying coal and
gas outburst remains unclear. Given the low-index outbursts encountered in mining practice …

A triaxial creep model for deep coal considering temperature effect based on fractional
derivative is proposed for the condition of triaxial stress state. In order to study the …

Long-term experiments were performed on red sandstones after different thermal treatments
(25, 300, 700 and 1000° C) under multi-step loading and unloading cycles and a confining …

Coal seam degasification by underground drilling and its effect are directly related to mining
safety and coalbed methane (CBM) recovery efficiency. The coal seam permeability is a …

Air leakage in borehole not only seriously restricts the development and utilization of coal
bed methane (CBM) but also affects gas disaster prevention and underground safety mining …

In coal mining industry, with the depth growing of coal mines, the creep behaviours of coal
and rock can extensively affect the mining safety, coalbed methane recovery and geo …

It is of great significance to quantitatively describe the change in the permeability of the
water-injected coal to improve the effect of the coal seam water injection technology …