School of Geosciences and Surveying Engineering,China University of Mining and Technology( Beijing) Kailuan
Group Corporation Limited School of Resources and Geosciences,China University of Mining and Technology

为了揭示钱家营矿深部-850 m水平瓦斯动力现象及其地质控制因素的关系,基于该矿井深部瓦斯实测数据,研究了煤厚、构造、地应力、瓦斯压力及含量等地质控制因素。结果表明:瓦斯突出区域5号煤层煤厚异常,其变异系数大于90%;多条逆断层使煤体结构更加破碎;地应力大且水平主应力最大达43.87 MPa;瓦斯突出区域中瓦斯含量较高且瓦斯压力高达到4.6 MPa。鉴于以上结果,依据《防治煤与瓦斯突出规定》的瓦斯压力临界值0.74 MPa,在褶曲发育区、构造简单区及断层发育区选择不同煤层变异系数作为界限值,对5号煤层瓦斯动力危险等级进行区划,结果显示在矿井北部存在2个瓦斯突出危险区,而矿井其他区域属于瓦斯突出重点防治区。

In order to reveal a relationship between a deep- 850 m gas dynamic phenomenon and the geological control factors in Qianjiaying Mine,based on the deep gas measured data of the mine,the paper studied the seam thickness,mine structure,geostress,gas pressure and content, and other geological control factors. The results s howed that a thickness of No. 5 seam in the gas outburst area was abnormal and the variation coefficient of the thickness was higher than 90%. Many reverse faults made the seam structure more broken,the geostress was high and the horizontal main stress was 43.87 MPa in max. In gas outburst area,the gas content would be high and the gas pressure measured in the outburst area reached at 4. 6 MPa. Based on the above results,according to the' Regulations of the coal and gas outburst prevention" ,the gas pressure critical value was 0. 74 MPa. In the fold development area,structure simple area and fault development area,the variation coefficient of different seam would be se lected as a threshold. A danger grade division was conducted on the gas dynamic of No. 5 seam. The division results showed that there were two gas outburst danger area s in the north part of the mine and other area of the mine was an important prevention area of the gas outburst.