窖沟矿区是一个以银铅矿为主的多金属矿床。地层复杂,施工难度较大。因此,工程进度缓慢,生产效率低,工程质量差,孔内事故频繁。通过四年来的工作实践,有些体会,教训尤深,现分别介绍如下。一、地质特征窖沟矿区地质构造表现为一系列东西向的紧闭背、向斜和断裂,在断裂带的不同部位,产生了不同力学性质的层间破碎带。矿区地层主要为中石炭统,南北分别以走向断裂与下二迭统和下石炭统接触。由于受地质构造影响,形成无数裂隙,溶洞以及未胶结的破碎带,层理、片理、节 Cellar ditch mine area is a silver-based polymetallic deposits. Stratum complex, construction more difficult. Therefore, the progress of the project is slow, the production efficiency is low, the quality of the project is poor and the accidents in the hole are frequent. Through the work practice in the past four years, some people have learned more about the lessons learned. The present briefings are as follows respectively. I. Geological Features The geological structure of the Jiaogou Mining Area is characterized by a series of east-west tight-closed backslope, syncline and fault. In different parts of the fault zone, there are interlayer fracture zones with different mechanical properties. The strata of the mining area are mainly the Carboniferous, and the north and south are respectively in contact with the Lower Permian and the Lower Carboniferous with strike faults. As a result of the geological structure, the formation of numerous cracks, caves and unintegrated broken belt, bedding, filming, section