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以淮北金石矿132采区3煤层为对象,通过实验室试验、现场观察、理论分析研究岩浆顺层侵入煤层对瓦斯赋存规律的影响。通过淮北金石矿地勘数据分析岩浆侵入范围及特征,结合煤体瓦斯基本参数,查明影响瓦斯分布规律的主要因素。结果表明:测定范围内大部分瓦斯含量较小,在0.19~6.69 m3/t,部分点存在以游离状态为主的瓦斯积聚现象;煤层瓦斯压力在0.11~0.25 MPa,没有明显规律,瓦斯仍处于瓦斯风化带或向甲烷带的过渡带;f在0.3~2.04,煤体普遍较硬,Δp在133.3~999.8 Pa,瓦斯放散初速度较慢;灰分、挥发分较大,随埋深有上升趋势,二者是影响该区域瓦斯分布规律的主要因素,煤的变质程度变化较大,部分变为天然焦,但大部分区域为煤焦互层。
Taking the No.3 coal seam in 132 mining area of Huaibei Jinshi Mine as an object, this paper studies the influence of coal seam intrusion into coal seam on gas occurrence law through laboratory test, field observation and theoretical analysis. Based on the geomagnetic survey data of Huaibei gold quarry, the authors analyzed the scope and characteristics of magma intrusions and combined the basic parameters of coal gas to identify the main factors affecting the gas distribution. The results show that most of the gas content is small in the range of 0.19 ~ 6.69 m3 / t, with partial accumulation of gas in the free state. The gas pressure in the coal seam is 0.11 ~ 0.25 MPa, with no obvious regularity and gas still in the Gas weathering zone or transition zone to methane zone; f is between 0.3 and 2.04, the coal body is generally hard, Δp is between 133.3 and 999.8 Pa, gas initial velocity is slower; ash and volatile matter are larger, , Both of which are the main factors affecting the gas distribution in this area. The degree of metamorphism of coal varies greatly and some of it becomes natural coke, but most of the area is interbedded with coal coke.