同安煤业地面钻孔补勘分析

Analysis of ground drilling supplementary exploration in Tong'an Coal Industry

鉴于同安煤业地质勘探数据比较陈旧,为了保证该矿一采区的安全回采,进行了地面钻孔补充勘探。在勘探时,共施工3个地面钻孔,长度达到了1636 m,采用地质钻探和数字化物理测井。补充勘探结果表明,即将开采的一采区4号煤层以二氧化碳-氮气带为主,开采时涌水量达到530.34 m3/d,顶板的细粒砂岩抗压强度高于初次勘探结果。此次补充勘探为同安煤业未来安全高效开采奠定了基础。

In view of the old geological exploration data of Tong'an Coal Industry,in order to ensure the safe mining of the first mining area of the mine,the supplementary exploration of ground drilling was carried out.During the exploration,a total of three surface boreholes were constructed,with a length of 1636 m.Geological drilling and digital physical logging were used.The results of supplementary exploration showed that the No.4 coal seam in the first mining area was dominated by carbon dioxide-nitrogen zone,and the water inflow during mining reached 530.34 m3/d.The compressive strength of fine-grained sandstone in the roof was higher than that of the initial exploration results.This supplementary exploration laid a foundation for the future safe and efficient mining of Tong'an Coal Industry.