复杂地质条件综放工作面沿空巷道位置优选及支护研究

Study on Location Optimization and Support of Gob-side Roadway in Fully Mechanized Top Coal Caving Face with Complex Geological Conditions

为解决华阳二矿复杂地质条件沿空巷道变形破坏严重问题,以21306运输顺槽为例,综合运用数值模拟、理论分析、工程类比等方法,探究上区段工作面采空区影响下侧向支承压力分布规律,确定沿空巷道护巷煤柱最佳宽度为6 m,以“高锚固力-高预紧力-强护表”为理念设计锚网索支护方案,沿空巷道围岩整体稳定,保障了工作面的安全生产。

In order to solve the serious problem of deformation and destruction of gob-side roadway under complex geological conditions in Huayang No.2 Coal Mine, taking the 21306 transport channel as an example, the distribution law of the lateral abutment pressure under the influence of the goaf area in the upper section working face is explored by using the methods of numerical simulation, theoretical analysis and engineering analogy. It is determined that the optimum width of the protection roadway coal pillar in roadway along goaf is 6 m, and the anchor mesh cable support scheme is designed based on the concept of "high anchoring force-high pretension-strong protective table". The surrounding rock of the gob-side roadway is stable as a whole, which ensures the safe production of the working face.