摘要
以淮南潘三矿近水平煤层下保护层开采工程为研究对象,设计试验研究了在结合瓦斯抽采的条件下下保护层开采保护效果。研究表明,高瓦斯抽采条件下,近水平煤层下保护层开采后保护范围存在扩界空间。在瓦斯抽采率达到81.4%的条件下,保护层开采的卸压角由原来的理论卸压角锐角扩大到直角90°;保护范围内的瓦斯压力由2.4MPa下降到0.18MPa;瓦斯含量由7.1m3/t下降到1.94m3/t。
Taking the mining of lower protective seam under the fiat coal seam in Huainan Pansan coal mine as research object, the experiment was designed to study the mining effect of protective seam with gas drainage. The research shows that, with high - efficiency gas drainage, expand space exists in the protective range after the mining of protective seam. When the drainage is 81.4%, the pressure -relieving angle increases from acute angle （theoretical value） to right angle, and the gas pressure in protective range decreases from 2.4MPa to 0. 18MPa, and the gas content decreases from 7. lm3/ t to 1.96m3/t.
出处
《煤炭工程》
北大核心
2014年第3期48-51,共4页
Coal Engineering
基金
国家自然科学基金项目"爆破扰动下高瓦斯低透气性煤体的动态损伤本构关系及应力波传播特征"(51204007)
关键词
瓦斯抽采
高抽采率
下保护层
保护范围
gas drainage
high drainage rate
lower protective seam
protective range
