摘要
作者从瓦斯流动及煤与瓦斯突出的事例研究中发现:采场支承压力对煤与瓦斯突出具有一定的控制作用;煤与瓦斯突出点沿走向的分布与顶板初次来压、周期来压步距有着内在的联系;进而提出了可根据顶板来压规律预报回采工作面煤与瓦斯突出。
amounts of absolute gas emission and relative gasemission after roof weighting are 4.6-4.8 timesof that before roof weighting from the study of gasflow and coal and gas outburst. Therefore, the conclusion was obtained that the stope abutmentpressure has a certain control function for coal andgas outburst. Beause of periodical change ofabutment pressure, the structure of coal mass wasbroken up. It makes the pores in coal mass to closeduring bearing pressure the to open duringdepressurisation, the depressurisation flowingeffect is present. Hance, it creates the condition ofcoal and gas outburst also. At the same time, itwas round that the distribution of coal and outburstat strike has internal relation with first roofweighting and advance of periodical weighting.Further more, the paper proposes that coal and gasoutburst in working face may be predicted based onthe law of roof weighting, as well as the technicalmeasures on eliminating and relexing the abutmertpressure and influence of roof weithing, theexpanding range of gas flow duringdepressurisation, predicting and preventing coaland gas outburst.
出处
《矿山压力与顶板管理》
1990年第1期47-50,72-73,共4页
Ground Pressure and Strata Control
