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为了在金屬矿山坑內正确的指导探矿方向和探尋平行矿脉的变化情况,避免穿脉巷道的浪費,我們曾进行了100米小型水平鑽机(太原矿山机械厂出品的)金刚砂鑽头鑽进的試鑽工作,取得了一定的成效,且經过一年多以来的实践証明,具有如下优点:(1)效率高,成本低:在6—7度(摩氏硬度)的变質岩区,台班效率一般3—4米,最高达10米多,平均班效6米以上,比坑探快5倍多,每鑽进1米的費用相当于坑探1米成本的10—12％。(2)鑽机小,搬运灵活,安装快,操作輕便,事故少,純鑽时間多,一年多以来从未发生过重大事故。(3)提取岩心完整,采取率一般90％以上,高者100％。(4)用探矿孔可作爆破
In order to correctly guide the prospecting direction in the metal mine pit and explore the change of the parallel ore veins and avoid the waste of the tunneling pass, we have conducted the drilling of a 100-meter small horizontal drilling machine (produced by Taiyuan Mining Machinery Factory) Test drilling work has yielded some results, and after more than a year of practice, it has the following advantages: (1) High efficiency and low cost: In the metamorphic rock area of 6-7 degrees (Mohs hardness) Class efficiency of 3-4 meters in general, up to 10 meters and more, the average efficiency of 6 meters or more than pit exploration more than 5 times the cost of drilling 1 meter is equivalent to pit exploration cost of 1 to 10-12%. (2) small drilling rig, flexible handling, fast installation, easy operation, less accidents, pure drilling time, more than a year has never occurred before a major accident. (3) extraction of core integrity, the rate of more than 90% generally, the highest 100%. (4) with the exploration hole for blasting