浅谈K_2灰岩支护形式的选择

Discussion on the Choice of the Support Form of K_2 Limestone

针对K2灰岩顶板岩性完好、K2灰岩顶板裂隙、K2灰岩顶板溶洞三种情况,进行了支护形式分析。K2灰岩顶板完好时,顶板不支护;K2灰岩顶板揭露裂隙时,采用锚网梁支护,沿裂隙带布置锚杆;K2灰岩顶板揭露溶洞时,采用锚网梁联合梯形棚支护。

Aiming at three cases of the good lithologic of K2 limestone roof,K2 limestone roof fracture,K2 limestone roof cave,analysis the support form. When K2 limestone roof lithologic is well,the roof don’t support; When K2 limestone roof have fracture,using the anchor net beam support,arranges the bolt along the fracture zone; when K2 limestone cave roof exposed,using the support form of anchor net beam combined trapezoid roof.