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我队施工地点河南省洛宁县上宫金矿区,地层复杂,地表裂隙发育,浅部含风化裂隙水。沿脉勘探坑道均布置在断裂蚀变构造带接触面,围岩f值6～8,软弱破碎,且遇水软化、泥化。沿脉主巷约80％需要支护,常常由于掘进后支护不及时以及木支架不足以维护围岩的稳定而发生冒顶和片帮。这不仅影响掘进速度,增加工程成本,而且威胁工人的安全。为此,我们于1986年下半年开始试验,1987年推广使用锚喷支护。在巷道开挖之后,首先进行围岩收敛量测,对量测数据用计算机进行回归分析,得出围岩变形曲线,
Construction site of my team Shangluo gold mining area in Luoning County, Henan Province, stratigraphic complex, surface fissures, shallow fissures with water. Along the vein exploration tunnel are arranged in the fault-alteration tectonic belt contact surface, the surrounding rock f value of 6 to 8, weak and broken, and water softening, mud. Approximately 80% of the main lane along the main road needs support, often due to the tunneling support is not timely and not enough wood support to maintain the stability of the rock roof and the film to help. This not only affects the speed of tunneling, increases the cost of construction but also threatens the safety of workers. For this reason, we started the trial in the second half of 1986 and promoted the use of bolting and shotcreting in 1987. After the excavation of the roadway, firstly, the surrounding rock mass measurement is carried out, the regression analysis of the measured data by the computer is carried out, the deformation curve of the surrounding rock is obtained,