It is shown that small-curvature arch support is very superior to trapezoidal support in mechanical properties, and has higher bearing capacity and better self-stability, so that such problem as short-distance coal gateways and lower branch coal gateways
It is shown that small-curvature arch support is very superior to trapezoidal support in mechanical properties, and has higher bearing capacity and better self-stability, so that such problem as short-distance coal gateways and lower branch coal gateways
结果证明：小曲率拱型支架力学性能远优于梯形支架，支撑能力大，自身稳定性良好，有效解决了近距离和下分层煤层巷道不可锚且在强压下难支护的问题。