厚煤层综采放顶煤工艺区段小煤柱技术创新分析

Analysis of Technological Innovation of Small Coal Pillar in Thick Coal Seam Fully Mechanized Caving Mining Technology

对于沿空掘巷巷道的位置应力场的特点以及煤柱与巷道关系进行了一系列分析,分析结果显示即使是在特厚煤层开采时,也是可以应用沿空掘巷和小煤柱技术的。通过对于实验数据的具体测算和分析,可以得出以下结论:第一,煤柱侧向应力峰值在距离侧壁3 m左右的位置上。第二,煤柱应力峰值组测应该明显高于右侧。第三,正确的支护系数和方法可以提高煤柱强度。此次实验的成功标志着小煤柱沿空掘巷技术应用范围的进一步扩大,这就可以使得特厚煤层煤矿的安全性得到进一步提高,对于煤炭资源的节约也有一定的帮助。

For roadway driving along goaf roadway location characteristics of the stress field and the coal pillar of roadway and the relationship was analyzed,analysis results show that even in thick coal seam mining,but also can be applied along goaf and small coal pillar technology.Through the calculation and analysis of the experimental data,can draw the following conclusions：first,the lateral pillar stress peak at a distance of about 3 m side wall position; second,the coal pillar stress peak group was significantly higher than that of the right should be measured; third,the right supporting coefficient and the method can improve the coal pillar strength.The success of this experiment marks the further expansion of small coal pillar along the application scope of goaf roadway technology,it the safety of the extra-thick coal seam coal mine can be further improved,and the coal resource saving also has certain help.