Multi-parameter response characteristics of coal seam stress distribution patterns and gas dynamic parameters under multiple mining disturbances
QIU Haisheng
ZHANG Kaiwen
ZHANG Hongzhen
NI Xing
ZHANG Kaijia
Abstract：In deep coal mining,multiple mining disturbances(MMI)from the upper protective layer and adja-cent goaf lead to a complex reconstruction of the coal seam stress field,significantly affecting gas occurrence and desorption behavior.Traditional single-disturbance theory is inadequate for accurately guiding gas disaster prevention and control under such conditions.Therefore,clarifying the spatial response relationship between stress distribution and gas parameters under multiple mining disturbances has become a theoretical bottleneck and an urgent practical need for achieving precise early warning of gas disasters.This study focuses on the 11063(lower)return air roadway in Majiatian Coal Mine as the engineering background.Utilizing field meas-urement methods,it quantitatively analyzes the evolution of key indicators—such as drilling cuttings quantity(S),gas desorption index(K1),and residual gas content(W)—with spatial position(ranging from 6.9m to 27.4m from the goaf).The experimental results show that:(1)The distribution of drilling cuttings exhibits a"double-peak" stress characteristic under multiple mining disturbances,with a pronounced pressure-relief stress elevation zone located near the goaf(Zone B2)and a closed stress elevation zone approximately 21.4m from the goaf(Zone B1).(2)The peak values of the gas desorption index K1 and residual gas content are both observed in Zone B1 rather than in Zone B2 where the absolute stress is higher.This indicates that gas pa-rameters are closely associated with related to the"closure" of stress rather than its absolute magnitude,revea-ling a non-monotonic response mechanism.(3)By integrating the three indicators—S,K1,and W—Zone B1 can be accurately identified as a "three-high" hazard zone characterized by high ground stress,high gas con-tent,and high desorption potential.Theoretically,this study elucidates the response mechanism of "multiple mining disturbances-stress field evolution - gas desorption and migration," correcting the traditional that focu-ses solely on absolute stress values.In practice,it clarifies that the second stress concentration zone(Zone B1)is the key target for gas disaster prevention and control.The findings provide critical theoretical support and data for establishing a multi-parameter coupling-based precise early warning method and formulating targeted control measures under similar mining conditions.
Keywords：multiple mining - induced disturbancesstress distributiondrilling cuttings quantitydrilling cuttings gas desorption indexgas pressure relief
Publication Date：2026-02-28
Online Publishing Date：2026-03-12(First online date of this platform, not the publication date of the document)
Pages：10( 47-56 )