煤巷迎头深部瓦斯赋存规律的实验数据分析

根据近两年来对不同矿区、不同煤层的不同煤巷掘进工作面迎头深部瓦斯赋存量以及突出预测数据的现场及实验室测定结果,得出一个在动态应力场作用下的工作面(掘进、回采)迎头深部瓦斯赋存量随深度变化的一个驼峰曲线,即工作面迎头深部的瓦斯赋存量受采动的影响而在不太深的位置处(如5~10m)会产生一个赋存峰,随着深度的增加瓦斯赋存量并非随之一直增大,其分布特征也与现有认识不尽相同。该测定结果为解释和研究工作面迎头深部的瓦斯运移、应力场分布、突出预测等提供了一个现场数据结论,为煤岩体流变模型的建立提供了相应的参考,也提出针对测定结果的疑问。

Test Data Analysis on Gas Accumulating Rule behind Digging Working Face

According to the recent two-year test data from different digging working faces in different coal mines, a rule about the gas accumulating quantity of working faces under dynamic stress field was gotten. A hump-curve was established through this rule. The hump-curve shows that the gas accumulating quantity behind digging working face is not increasing along with the adding of the depth, but there is a hump (peak value) in a certain depth (for example, in 5-10 meters). This rule is not completely in line with the current cognition. The rule not only offers field data test result for the research on gas moving, stress field distribution and gas outburst mechanism, but also provides references for the establishment of rheological model of coal rock mass. Finally, some questions are also presented for the monitoring results.